wire rope isolators damping factory

Look to Enidine for high performance Wire Rope Isolators and Compact Wire Rope Isolators. The wire rope isolators have stainless steel cable and RoHS compliant aluminum retaining bars, which provides excellent vibration isolation. The isolators are corrosion resistant, which makes them environmentally stable and high-performance in a variety of applications. The isolators are completely unaffected by oil, chemicals, abrasives, ozone, and temperature extremes.

The compact wire rope isolator is smaller than a traditional wire rope and can absorb shock and vibration in small spaces. Single point mounting offers flexibility for integration into existing products.

Both compact wire rope isolators and wire rope isolators can be used on galley components where motors and fans produce vibrations onto surrounding structures. They can also be used to control vibration and thermal expansion.

An isolator’s primary purpose is to protect valuable equipment by reducing incoming vibrational wave energy. Because vibration and shock are everywhere, unprotected devices could be at risk of damage from a large number of potential sources, such as hazards during transport and handling, vibration generated by other equipment, or even seismic events. Wire rope isolators use premium metals to provide heavy-duty protection to this equipment with minimal maintenance requirements while offering a long product life.

A shock and vibration isolator acts as a buffer and stabilizer between an object and a vibration or shock source. When the surface on one side of an isolator receives a shock, the isolator re-distributes the shock into a lower amplitude and longer duration acceleration, reducing the stress experienced by supported equipment on the other side. In some applications, isolators use friction damping to absorb and dissipate energy in the form of heat.

Isolation Dynamics Corp. offers the very best vibration engineering solutions like our mechanically fastened wire rope isolators and isolation assemblies for a variety of applications – including architectural foundations, oil pumps, compressors, and rugged naval electronics enclosures. Learn more about our IDC isolators below!

VMC Group offers a variety of wire rope isolators that resolve shock and vibration issues in virtually any application. By selecting wire rope with the proper characteristics - wire diameter, number of strands, cable length, cable twist or lay, and the number of cables per section, we have created isolators that provide superior equipment protection. Ideally, passive isolation systems require no maintenance, use little space and keep functioning under varying temperatures and in corrosive environments.

As an elastic element, wire rope isolators will afford attenuation of vibration disturbances in much the same manner as they attenuate shock inputs. Wire rope isolators provide inherent damping by virtue of relative motion between wire strands. This damping limits vibration response peaks and limits responses to start-up and shut-down transients.

Isolators must also attenuate shock with minimum dynamic travel. A design that buckles under heavy shock loads without bottoming or permanent deformation provides the large deflection needed to bring the impacts within acceptable limits. When shock load is applied, the isolators soften and deform. This displacement reduces the acceleration level, through the controlled buckling of the wire rope loops.

This wire rope design handles both shock and vibration. In addition, three-plane, all-axes isolation permits installation in any attitude - vertically, horizontally or laterally.

Vibration is undesirable in domains like engineered systems and habitable spaces, and methods have been developed to prevent the transfer of vibration to such systems. One of the ways to mitigate those vibrations is by “active vibration isolation” by employing electric power, sensors, actuators, and control systems. The other way is to use “passive vibration isolation” with techniques such as rubber pads or mechanical springs orwire rope isolators.

Wire Rope Isolatorsare durable and can withstand extreme environments. They are utilized in a variety of industrial and military devices. While such isolators are intended to protect the mounted item from shock and vibrations occurring along all three spatial dimensions or axes, as a practical matter the configuration of the isolators results in substantially greater stiffness and damping effect along one axis. Accordingly, a choice must be made as to the type of vibration of primary concern, with a response along the other axes being severely compromised.

The wire rope isolators have stainless steel cable and aluminum retaining bars, which provides excellent vibration isolation. The isolators are corrosion resistant, which makes them environmentally stable and high-performance in a variety of applications. The wire rope mounts are unaffected by harsh environmental conditions and temperatures, oils, abrasives, mycosis, humidity, ozone, grease, chemicals, nuclear radiation, ozone, dust and erosion of organic solvent. The compact wire rope isolator is smaller than a traditional wire rope and can absorb shock and vibration in small spaces. Single point mounting offers flexibility for integration into existing products. With versatile mounting options, crimping patterns, and size variation, wire rope shock absorber products can help your systems meet all requirements for industrial, defense, and commercial uses. Both compact wire rope isolators and wire rope isolators can be used on galley components where motors and fans produce vibrations onto surrounding structures.

A wire rope vibration isolator includes a coil of wire rope having a predetermined number of individual consecutive coils, a first crimp bar, and a second crimp bar. Each of the crimp bars is rectangular in shape and has a pair of opposing side surfaces. A series of lateral holes extending from one side surface to the other side surface of each of the bars is provided so that the predetermined number of individual consecutive coils may be threaded through the series of lateral holes of each of the bars. In this manner, when a crimping force is applied to each of the two crimp bars at a point where each of the individual coils passes through a respective bar, the coils are thereby secured in a fixed position relative to one another while remaining elastically deformable. A spring-like quality is thus imparted to the coil of wire rope so that the first crimp bar and the second crimp bar may move relative to each other to dissipate vibrational energy. This elastic support is for heavy-duty machinery such as generators and vibration isolation for delicate applications such as precision instruments, transportation of missiles and satellites, processors, communication units, protection for navigation and launching systems as well as large scale construction. The working temperature for wire rope isolators is -75°C－+175°C, up to +370°C and each wire rope isolator comes with softened non-linear stiffness. The performance of a wire rope isolator is dependent on its inherent elasticity and damping. The elastic spring function is created by the flexing of the cable that is wound and clamped into a loop. The damping function is the result of friction between the individual wires as the rope flexes. The exceptional advantages are:

There are manufacturers out there offering a variety of wire rope isolators. Select a company who is specialized in the same and opt for wire rope isolators that best fits the applicational requirement. Consult with the specialist to help you with the selection of the wire rope isolators.

Wire rope mounts also commonly known as wire rope isolators are efficient vibration isolation equipment’s made with heavy-duty, stainless-steel wire rope cables that are

threaded through aluminium alloy retaining bars, crimped and mounted for maximum shock and vibration isolation. Designed as the best quality corrosion resistant, stainless-steel metal construction, wire rope mounts are easily resistant to harsh environmental conditions, varied temperatures, oils, abrasives, humidity, ozone, grease, chemicals, nuclear radiation, ozone, etc.

A wire rope vibration isolator is undoubtedly the highest performance shock absorber and vibration isolator used in a number of industrial applications. They are very useful vibration dampers used in the industry to maintain vibration isolation performance under maximum shock in severe environmental conditions. Featuring long life span and ability to adapt to elastic displacement in all dimensions and with the capability of multi-directional vibration isolation these versatile pieces of equipment can be installed in different ways.

Wire rope isolators for vibration dampening provides great elastic support for heavy duty machinery such as generators and vibration isolation for delicate applications like precision instruments, satellites communication units, navigation and launching systems to name a few. One of the major benefits of a wire rope isolator is its ability to provide high level shock and vibration isolation, in combination with relatively small dimensions. Their ingenious construction makes them the best equipment for shock absorption and vibration dampening Although these compact wire rope isolators are limited by their own construction, but they can be loaded in any direction without having to worry about malfunctioning. Additionally, these wire rope isolators are maintenance-free and are not subject to aging due to any external forces or environmental conditions.

Generally, the wire rope isolatorsare constructed in a way that can be fine-tuned with the exact requirement of the application. Applications that need to be mounted against shock or vibration, and have no requirement for sound isolation, wire rope isolator dampening system makes for the best equipment. These equipment’s work in temperature ranging from -75°C－+175°C, up to +370°C with maximum dynamic displacement of over 70 percent. The dynamic stiffness of the equipment tends to decreases when the displacement increases. You will find a wide range of applications in which wire rope vibration isolators are used. Some of general applications of wire rope isolators are electronics, HVAC equipment, fans, electronics, airborne equipment, motors, generators, pumps, blowers, marine equipment, industrial vehicles, mechanical devices, fuel tanks, mounted cameras, drones, rough terrain vehicles, industrial and medical equipment, computer cases and hard disc drives, industrial and military application, aircraft and much more.

Vibrations arising from machines tend to damage them and eventually lead to the wear and tear of the machine parts. Besides, we all know how expensive it is to keep equipment’s perfectly balanced. Further it is often inefficient to add structural reinforcements to solve the issue. However, for situations like these wire-rope isolators are cost-effective way for addressing vibration and fatigue caused by machine structures from fatigue.No just that these wire rope vibration isolators also helpattenuate shock.

Wire Rope Isolators are equipment’s used commonly in industrial machines for effectively isolating the system from high frequency vibrations. In general, wire rope isolator is categorised as a passive type of isolator that exhibits nonlinear behaviour. They are strong versatile equipment’s made of stranded wire rope place between two metal retainer bars offering excellent vibration isolation. Designed and built strong, these isolators are corrosion resistant and high-performanig equipment’s applicable to a wide a variety of industrial machines. They are industrial equipment resistant to oil, chemicals, abrasives, ozone, and even temperature extremes.

Wire rope isolators or wire rope mounts as we call them are available in wide variety. Manufacturers offer compact wire rope isolators which are smaller than a traditional wire rope and are designed specially to absorb shock and vibration even from the smallest piece of equipment. Their single point mounting feature offers flexibility for integration into any existing products. Further, with their versatile mounting options, crimping patterns, and size variation, these helical isolator products can help the system meet all requirements for industrial, defence, and commercial usage. Both compact wire rope isolators and the traditional type of wire rope isolators can be used in small machines or equipment’s that produce vibrations onto surrounding structures. They can also be used for controlling vibration and thermal expansion.

Even in case industries have a non-standard application one can still use the traditional wire rope isolators. These standard wire vibration isolators can be used nearly in any applications. What’s even better they can be customized as per requirement of the application to suit one’s industrial needs. These vibration isolators are easy for installation and capable of static load deflection. Further their cost effective and durable metal design is suitable for even hostile environment. The equipment is perfect for small equipment’s and suitable with temperatures ranging from -100 to 260 C. Common applications in which wire rope isolators are used includes medical equipment’s, small motors and pumps, drives, mobile electronics, electronic containers etc to name a few.

As we all call it, the compactwire rope isolatorsare equipment’s used for isolation of vibration and dampening of shock from machines. Similar to the traditionalwire rope isolatorsthey possess isolation capabilities that protects machines from the impact of shock and vibration.Compact Wire Rope Isolators are equipment’s known for the best performance in vibration isolation.Their compact design which is smaller than the traditional wire ropesoffers both shock and vibration absorption especially in places where package space is an issue. They are often used in applications that have space constrain and yet need an equipment to support and solve the shock and vibration issues.

A number of manufacturers offer vibration wire rope isolators to meet the standard industrial requirements of consumers in the industry. Most of the Wire Rope Isolator is made of all-metal, which probably offers the best multi-axis shock and vibration isolation.These wire ropes isolateand perform even in the most hostile environmental conditions, making it the mostreliable equipment for shock and vibration issues.Compact wire rope isolators are products that do not generally require much of maintenance and are highly resistant to oil, ozone, abrasives, and chemicals.Compact Wire Rope Isolatorsare a proven solution, best known for their vibration isolation and shock dampening capabilities.Their unique capabilities of simultaneous shock and vibration attenuation makes them the best equipment to be used in any given industry where vibration and shock is a major issue. Using these equipment’s can help reduce the amount of premature machine failure and probably even an expensive machine downtime.

In case you have a non-standard application, you may still be able to use regular wire Rope Isolators to resolve the issue of vibration and shock. These standard products of wire rope vibration isolators can suit nearly any application. In fact, in cases where customization is required, professional manufacturers like the Andre HVAC Inc can offer you the solution and create a custom isolator as per your requirement. The vibration wire rope isolators that these manufactures provide, offer exceptional multi-axis shock and vibration isolation. Durable and reliable, these products second to none in the industry. By using the compact wire rope isolatoroffered by Andre HVAC Inc, the effects of shock and vibration incurred by machinery in your industry can be significantly reduced, prevented or even eliminated. This can prevent any form of premature equipment failure that could affect the machine and its adjoining equipment’s as well.

Compact wire rope isolators find a in wide variety of application in equipment’s like medical equipment, disk drives, small motors and pumps, electronic gadgets, electronic containers to name a few.

Equipment’s and machineries in general are hard to maintain and be kept in perfectly well-balanced condition. Not just that, it is also at times difficult to add structural reinforcements to the machines due to space constrains or probably being expensive. However, using a wire-rope isolator will probably be just the right thing for your industrial machines. Vibration wire rope isolators are cost-effective ways to address vibration and shock issues. If done rightly, they will surely save a lot of machines and structures from premature failure and fatigue.

A number of industries use vibration isolation pads on machines and electronics for attenuation of vibration and noise levels, however, they do not really isolate the heavy shock loads. So, for equipment’s or machines that just need attenuation of vibration and shock, Wire rope isolators are the best option.  Wire rope isolators come in standard and compact form. While the compact wire rope isolators are used in small devices and equipment’s that have space limitation, the standard wirerope isolators can be used in any machines or equipment’s in general. Most applications of wire rope isolators are in machines or equipment’s which need to be mounted against shock or vibration, but where sound isolation is of minor importance.

Standard wire-rope isolators from anti-vibration isolator manufacturers are made of stainless-steel cable that threads through aluminium-alloy retaining bars. Changing the thickness of the cable, the number of loops and the angle of mounting results in specific behaviour under a given shock and vibration load. This way one can fine-tune the construction of the wire rope isolator to specific customer requirements, even in case of low quantities. In general, the wire vibration isolatorsare available in an array of mounting options and size with different versions to meet commercial, industrial, and defence standards

One of the main benefits of a wire rope isolator is its ability to combine a high level of both shock and vibration isolation in combination to relatively small dimensions. The construction of vibration wire rope isolators is ingenious. Wire rope isolators are equipment’s designed in a way that can be loaded in any direction without having to worry about its malfunctioning. Further, these equipment’s are Corrosion-resistant and practically unaffected by extreme temperature, ozone, chemicals, oils, and abrasives. Not just that, they are maintenance-free equipment’s making it the most durable and reliable equipment.

General application of vibration wire rope isolators includes military applications, electronics, medical equipment, avionics, generators, motors and pumps, shipping containers, aircraft, radar communication equipment, mobile vehicles, fuel tanks to name a few. The standard wire rope isolators are applicable for any machines or devices however, if not you can get them customized to even suit your requirement. For this you’d probably need to speak to a professional manufacturer who is ready to even customize small quantities for you. You need to first discuss and figure out what best fits your requirement and then accordingly place an order of wire rope isolators as per the configuration required by you.

Every wire rope isolator has specific response and characteristics determined by the diameter of the wire rope, the number of strands, the length of cable, twist or lay of the cables to the number of cables per section. Helical Wire Rope Isolatorsare equipment’s made up of helical stranded wire rope that are held with rugged metal retaining bars. This equipment is designed in a way to provide excellent shock and vibration isolation for subcomponents of various types of equipment. Helical wire rope isolators are typically ideal isolation equipment for machines and devices that have space constrains. They are isolation equipment’s typically suited for sensitive mobile equipment, avionics and shipboard electronics, and satellite related equipment.

Generally, the series of Helical Wire Rope Isolatorsare made of stainless steel wire rope and corrosion resistant aluminium alloy retainer bars.You also get these equipment’s in other materials which include galvanized wire rope and stainless-steel retainer bars.The isolators offered are mullti-axis isolators that can be used in any vertically, horizontally and laterally altitude.The large dynamic displacement, the more it attenuates heavy shocks, and the inherent damping offered by these wire rope isolators enable the Isolators to minimize post-shock noise and lowers the levels of vibration. The performance of these equipment’s are measurable and predictable. So, depending on the requirement one could probably select the right wire rope isolator for their machines and equipment’s

The Helical Wire Rope Isolators are designed to function in any temperature from -400⁰F to +700⁰F.not just that, these isolators resist ozone, oil, grease, and organic solvents making it to resilient to even harsh environment of the industry.What makes these wire rope isolators so special is that once they are installed, they need little or no maintenance and many times they tend to outlast the machine in which they are installed.

Helical wire rope isolators are made up of special cable materials which is galvanized steel and other stainless-steel alloys that are corrosion resistant and have special bar materials made of stainless steel, titanium finish plating’s and special mounting configurations in which they are available.

The general application of helical wire rope isolators includes Power generation, Truck, bus and recreational vehicles, Shipping transports/containers, Railroad, Off-Highway construction equipment, Offshore, Commercial marine, Mining, Industrial machinery

Wire rope isolators are high performance isolation equipment’s used in a number of industries to curb the problem of vibrations from machines. These equipment’s are one of a kind instruments designed with an intention to offer maximum vibration isolation to machines in which they are installed. Generally, Wire Rope vibration Isolators are made-up of stainless steel cables and aluminium retaining bars that provides excellent vibration isolation to industrial machines. Not just that, being a corrosion resistant equipment, they are highly resistant to harsh environmental conditions, providing high performance on a variety of applications in which they are installed.These vibration wire rope isolators are completely unaffected by any liquid, oil, chemicals, abrasives, ozone, and temperature extremes.Wire rope isolatorsalso comes in a compact form known as thecompact wire rope isolators.These are no different than the general ones except for the fact that compact wire rope isolators are smaller in size. Further, as compared to the traditional ones, thesewirerope isolatorsare known for their capabilities of efficiently absorbing shock and vibration in spaces between machines and the equipment.Compact isolators offer single point mounting which makes them highly flexible and easy for integrating into existing products. As a versatile piece of equipment, it offers different mounting options, crimping patterns, and size variation.In fact, thehelical wire rope isolator can help your systems meet all standard requirements for industrial, defence, and commercial uses.Both compact wire rope isolators and the tradition wire rope isolators can be used on components or machine in which their motors and fans produce vibrations onto surrounding structures.

We all know that shock and vibration can together or individually influence the performance and life expectancy of nearly all kind of mechanical and electrical device, be it large or small. However, with isolation equipment’s like the vibration wire rope isolators, it can really make the difference. Wire rope isolators have found numerous applications in the shock and vibration isolation of military hardware and industrial machinery. However, most applications of wire rope isolators are equipment’s that needs to be mounted against shock or vibration, but where sound isolation is typically a minor issue and given not much of importance.

The wire rope company vibration isolation dampeners are products designed to effectively reduce transmitted shock and vibration and provide means and ways of adjustment up to the precise level, aligning, and supporting the industrial machinery. These products generally provide protection to systems like the industrial machinery and building structures from incoming vibration and shocks caused by machinery. It is rightly said in today’s industry that no other isolator in the market can match the versatility and performance characteristics of the wire rope Isolator. So, if you have plans of buying one for your industrial machines, do consider consulting specialists of the industry before purchasing one. Understand from the manufacturers how best wire rope isolators will help you solve vibration and shock issues for your machineries and then accordingly invest in what best suits your requirement.

vibrations could affect the life, stabilityandperformance of any engineering system or structure. But with right isolation equipment’s like thewire rope isolatorsfor vibration dampeningcan help you control or rather limit the levels of vibration in a given system.

The mechanism of vibrations is to generate mechanical waves which travels or transfer to the mechanical chains to the elements of mechanical linkages. Technological advancements have devised two separate approach to tackle this undesirable vibration and reduce its effect for improved stability and performance. One of the approach which involves high investments of installing sensors and expensive actuators that generate disruptive interference to counters the mechanical vibrations. The method of countering mechanical vibration through sensors and actuators is grouped under Active vibration isolation. On the other hand, the second approach involves installation of material and mechanical elements that absorb and damp the undesirable vibrational energy. The method of isolating vibration by installation of dampening element is grouped under Passive vibration isolation. Passive vibration isolation offers minimum vibrational energy transfer at extremely low cost as compared to active vibration isolation. Various materials and mechanical elements that come under the passive vibration isolators includes equipment’s like the vibration isolation pads and wire rope isolators.

Wire rope isolators are devices that offers maximum resistance to the flow of vibration energy.  Standard wire rope isolators are constructed from stainless steel stranded cables, threaded through aluminium alloy retaining bars that are mounted for effective shock and vibration isolation. Its high corrosion resistant property and all metal construction makes wire rope isolators stable, high performing vibration isolators that are resistant to temperature extremes, chemicals, oils, ozone and abrasives. Design and construction of wire rope isolator ensure maximum performance and stability in industrial and defence applications. Applications which require high vibrational isolation in minimum space, compact wire rope isolators are adopted.  Compact wire rope isolators are generally lesser in dimensions as compared to the standard wire rope isolators, these uniquely designed wire rope isolatorsprovide cost-effective, shock and vibration attenuation in areas where space is a major constraint.

While selecting a vibration isolator take in to account the level of shock and the average stiffness and deflection required in a Wire Rope Isolator. While robust construction of standardwire rope isolators offers complete stability to the entire mechanical system, the compact wire rope isolator is capable of providing isolation to the smallest element in system. Such wide range of flexibility offers free hand to designer for building a highly stable, effective and efficient system.

Vibrations in industrial system is usually termed as the undesired mechanical energy generated due to rotating or sliding motions mechanical parts which when transmitted to the other elements of mechanical system results in inefficiency and loss. Vibrations tend to damage machine and sensitive electronics installed in the system. hence it becomes a challenge for any designer to reduce it to the maximum possible extent. Designers while designing any system often incorporate one of the most effective devices, which isolates the source of vibrations from the receiver and restricts the flow of energies by acting as a barrier. Modern day system designs widely incorporate equipment’s like the wire rope isolators, air springs, or elastomers.  However, the inherent property and construction of elastomers restrict its application to attenuate noise and vibration levels. On the other hand, wire rope isolator proves to be very effective and efficient to attenuate noise, vibration levels and shock too.

Wire rope isolators distinguish itself with the capability to tackle shock along with undesired vibrations, which affects the system to the maximum extent and assists designer in building noise free, vibration free and shock free system. One of the most widely adopted construction of wire rope isolators is made up of stranded stainless-steel cable that thread through aluminium-alloy retaining bars know as mounting brackets in industrial terminology. It is observed that for a specific application in specific environment, split bar is clamped on to the cables to offer required stability and strength for better vibrational control.

Application and compatibility of wire rope isolators have extended its use in every industry that makes it essential to be constructed for all working environments. In case of chemical industry where highly corrosive and volatile chemicals tend to showcase its effects on all metal component wire rope isolators need to be built with specific corrosive resistant material. Corrosion resistant metal construction gives the wire rope isolators a design strongly unaffected by temperature extremes, ozone, chemicals, oils, and abrasive environment. In modern day industry, it is very challenging and expensive to keep equipment perfectly balanced to get consistent results. Just by adding wire rope isolators on the required element, it protects machine structure, machine welds and brackets from fatigue regaining structural strength and improving performance life of the machine.

Wire rope isolators not only improves machine life, machine stability and machine welds but it also helps in building a system that can deliver consistent and reliable results with accuracy and precision. Wire rope isolators prove to be very effective and efficientbecause of its below mentioned characteristics which enable designer to build a strong and reliable system. Read the below given characteristics to better understand the features of wire rope isolators.

Wire Rope Isolation equipment’sare high performance equipment’s used for the purpose of vibration isolation of industrial machines. TheWire rope isolators for vibration isolation of equipmentare designed and made of stainless steel cable and aluminium retaining bars, which provides excellent vibration isolation.In addition to this, these isolators are corrosion resistant equipment’s that are ideal for any environment and perfect for high-performance in wide range of industrial applications. Well coated, these wire rope isolation equipment’ are completely unaffected by oil, chemicals, abrasives, grease, nuclear radiation, ozone, dust, erosion of organic solvent or for that matter even extreme temperature.

Wire Rope Isolation equipment’sact as an effective shock absorber and vibration isolation equipment that is used in number of applications. They are useful vibration dampers that often maintain excellent vibration isolation performance under maximum shock even in the most severe environmental conditions such as chemical pollution or extreme temperatures.What really makes them so special is their long-life span and capability of adapting to elastic displacement in all dimensions, allowing multi-directional vibration isolation.In addition to this, their versatile features allow its installation in many different ways.

The construction of these dynamic Wire Rope Isolation equipment’s is absolutely ingenious. Designed with stainless steel wires that are twisted into a cable and mounted between two bars these equipment’s are made for rugged use.The thickness of the cable, the number of loops and the angle of mounting, can be customized as per the requirement of results in specific behaviour under a given shock and vibration load.They are constructed in a way that specifically meet customer requirements to suit varied industrial use. Mostly wire rope isolators are used in equipment’s that need to be mounted against shock or vibration, and where sound isolation is of minor importance.

Wire rope isolators for industrial use come in a wide variety namely the compact wire rope isolator, heavy duty wire rope isolator, and circular wire rope isolator. While the compact wire rope isolator is smaller than a traditional wire rope, but they do absorb shock and vibration from small spaces. With versatile mounting options, crimping patterns, and size variation, these products meet the system requirements for industrial, defence, and other commercial uses. In fact, Wire rope isolator for military use and wire rope isolators for vehicle use are very common. In general, both compact wire rope isolators and wire rope isolators are used in galley components, where motors and fans produce vibrations and transmit them to the surrounding structures. They can also be used in controlling of vibration and thermal expansion.

Wire rope isolators for vibration isolation of equipment are also used for heavy duty machinery such as generators and also for delicate applications such as precision instruments, processors, transportation of missiles and satellites, communication units, protection for navigation and launching systems and large-scale construction. They are used in application like electronics, airborne equipment, avionics, motors, pumps, blowers, fans, HVAC equipment’s to name a few.

By their nature, wire rope isolators are self-snubbing, fail-safe, and captive to the ultimate limits of the metals. They are insensitive to temperature from cryogenic up to near anneal. They resist most industrial and natural environments. The VMC Group’s manufacturing process is set up to create special winding configurations to customize spring rate and deflection.

The tables referenced are not a substitute for proper analysis of system requirements. The key elements to performing a meaningful selection and analysis are:Payload weight, geometry, center of gravity, isolator location

Quite often, we size the isolation system to do the best job within reasonable size constraints. Any theoretical isolator selection must be reconsidered in light of real-world limitations on equipment sway space and the isolator’s physical size and stability. Some very simple equations are used in selecting wire rope isolators. When considering shock, we use an energy method. We reduce a shock pulse to an equivalent velocity step. For a few typical shock inputs, the velocity steps are as follows:

With the spring rate (K) and dynamic displacement (Dd) established, we can now select an isolator. However, designers should take caution: The spring rates published are average. The placement of the static load on the load-deflection curve modifies the spring rate, available dynamic deflection capability, and cross-axes stability. The load-deflection curves for the principal and cross axes should be requested and considered when making any selection. VMC Group’s modeling software takes both the full third-order curve and damping into account.

Particularly with wire rope isolators, a robust system should be designed such that variances in the effective natural frequency due to dynamic damping do not significantly alter performance in the desired band.

VMC Group pioneered the wire rope isolator more than fifty years ago. Steel wire rope is strong, flexible, and fatigue-resistant because it is made up of many individual strands of high-tensile strength drawn wire. When bent or buckled, it is as much an elastic element as any tempered coil spring or elastomeric mount. Due to frictional forces between the individual strands, wire rope can provide a significant level of dynamic damping — typically 15% to 20% of critical damping. This level of damping makes wire rope isolators attractive for applications that involve sweeps through resonance and transients such as shock.

To create a shock and vibration isolator from wire rope, VMC Group creates buckling elements either in the form of helical loops (Helical Series isolators), or individual arcs (Arch and Circular Arch Series). Like any buckling element, a third-order force-deflection curve results. This can also be called a “softening curve.” Graphically, the curve starts from zero and is nearly linear. As load and deflection increase, the curve eventually begins to flatten. At some further point along the load-deflection curve, it becomes steeper, creating an inherent snubbing effect.

Shock is attenuated by spreading the input energy over time and distance. The flattened section of the curve is excellent for this. The load-deflection curve of a wire rope is very long given the isolator’s physical size. The isolator is a hollow, slender device capable of collapsing in on itself. For its size, it can deflect far more than elastomer and more than a coil spring. This is not to say that wire rope isolators are strictly shock attenuators and not vibration isolators. As an elastic element in a spring-mass system, it will exhibit a natural frequency and thereby form a low-pass filter for vibration energy in the same manner as any coil spring or elastomeric isolator. VMC Group does not list load ratings for individual wire rope isolators and we publish two different average spring rates. We have average static load-deflection curves available in both hard copy and electronic form for the principal isolator directions. They are always available on request. We have also chosen not to include load-deflection curves for wire rope isolators and encourage you to obtain assistance from VMC Group’s Engineering Services Division at 1-800- 569-8423. In almost all cases, application assistance, including analysis and modeling, is performed free of charge and without obligation to the customer.

To determine how much load can be placed on a wire rope isolator, we must first ask what the customer intends to do with the isolator. If small amplitude vibration is the input, we can place the static load along much of the lower two- thirds of a typical load-deflection curve. The effective static spring rate is the tangent of the curve at that load point. If large amplitudes, particularly deep shocks, are to be the input, we place the static load down in the linear first third of the curve. This allows the load to ride high up onto the curve in response to the shock. In this case, the effective average spring rate is a global straight-line, end-to-end slope of the curve over the excursion. To provide average values in the catalog for design purposes, we take the vibration spring rate as the tangent slope near zero and the shock spring rate as the overall end-to-end straight-line slope over the curve. VMC Group’s modeling software takes the entire third-order curve into account. The non-linear nature of the response curve and the presence of input-dependent damping are good reasons to work with our engineering department when selecting an isolator.

Another reason to consult with VMC Group before selecting your wire rope isolators is the interrelationship between the axes of the isolator. Wire rope isolators are elastic elements in all directions simultaneously. This makes them suited for all-attitude and mobile applications and applications that involve complex, off-axis inputs. The physics of the isolator is such that most inputs produce a response with components in more than one direction.

We can manage this characteristic using properly engineered solutions that take all axes into account. It should be noted that use of the tension direction for primary shock attenuation is not recommended. This is due to the predominance of tensile loading within the cable that results in a stiffening curve.

As the world leader in wire rope technology, our custom plate assemblies, and custom-designed isolators have been used in various applications for over 50 years. Whether for avionics and aerospace equipment, electronics apparatus, engine gensets, auxiliary power supplies, or other sensitive equipment requiring isolation, our engineering group will work with you throughout the entire design process to provide the custom solution you require. Our modeling software has an excellent reputation in the industry for its accuracy and will ensure your project is designed correctly from the beginning. Our plate assemblies and custom isolators have been designed to support weights from just a few pounds to over 100,000 pounds and take the form of special length bars, differing diameter wire, and winds, custom rail systems, plate assemblies, trays, and skids. Our helical wire rope isolators have been qualified on numerous military projects requiring the following typical specifications for shock and vibration:

Wire rope isolators are mainly used to isolate vibration and protect precise equipment. However, the issue of regulation of vibration isolators taking into account the nonlinearity of their characteristics was poorly understood in the modern literature. In this paper, the influence of structural parameters (diameter ratio and lay pitch of the single strand, and lay pitch and bending radius of the wire rope) on stiffness-damping characteristics of the Polycal WRI was investigated by the simplified finite element analysis method. The stiffness and damping prediction models including structural parameters and material properties were established. The results showed that the stiffness-damping characteristics were the best; when the diameter ratio of wire strand was 1.1, the inside layer wire pitch length was 6 times the diameter of the wire strand, the outside layer wire pitch length was 11 times the diameter of the wire strand, the pitch length of the wire rope was 7.5 times its diameter, and the bending radius was equal to 46.5 mm. The errors of the prediction for prestiffness and softened stiffness were within 5%, and the errors of prediction for the energy dissipation coefficient were within 10%.

Vibration is common in our lives. Especially in many industries, vibration is caused by the equipments operation, fluid flushing in pipes, and aero engine. This is harmful for operation safety [1–3]. Many vibration reduction and vibration suppression methods have been studied. Vibration isolators are widely applicable to production and living. Particularly, it is widely used in equipments with high load and vibration reduction requirements. In recent years, new type of vibration isolators and design of vibration isolation systems are hot topic for scholars. Wire rope isolator (WRI) has excellent rigidity damping characteristics, especially with high bearing capacity. It is widely used in mechanical manufacturing and construction. Therefore, it is necessary and significant to study the characteristics of the WRI with different structural parameters.

The characteristics of the WRI are studied through the experimental and theoretical methods [4–11]. Chen et al. [12] investigated the contact statues of a steel wire rope from the perspective of theoretical analysis. The result shows that the effect of the lay angle on the stiffness of the wire rope is different under different loads. Tinker and Cutchins [13] obtained the data of stiffness and damping characteristics of the WRI through dynamic experiment. It is also found that the damping of the WRI is related to coulomb-type friction. Demetriades et al. [14] studied the response characteristics under different loads for different structures of the WRI. The result indicated that the WRI exhibits the same characteristics under shear and roll loads. Wang et al. [15] experimentally investigated the effects of load frequency, amplitude and structural parameters on the dynamic characteristics of O-type WRIs. He found that the loading amplitude and geometric parameters of the isolator directly affects the dynamic characteristics of the isolator, while the loading frequency has no effect on it. Gerges [9] investigated the tension-compression mode of the wire rope spring. He presented a semianalytical model for a wire rope vibration isolator through experiment. Rashidi and Ziaei-Rad [7] investigated the quasi-static and dynamic characteristics of the WRI. It is suggested that there is not obviously relationship between hysteresis loops and loading velocity under quasi-static load. The dynamic results indicated that by increasing the frequency of excitation, the area of the hysteresis loop starts decreasing. Finally, a hysteresis analytical prediction model with high coincidence degree was established.

The finite element analysis method can reduce the cost of the experiment, and thus has been widely used in studying the characteristics of the WRI and wire ropes. Jiang et al. [16] found effective simplified finite element analysis method of analyzing the contact statues of wire ropes. It was found that the local contact deformation affects the accuracy of the results. Wang et al. [17] investigated the mechanical behavior of the YS9-8 × 19 braided wire rope under tensile load. By comparing the results of finite element analysis and experiment, the error between them was small, and the accuracy of the model was verified. By the finite element method, Xiang et al. [18] obtained the elastic-plastic contact stresses under axial and torsion loads of wire ropes, and investigated the elastic-plastic behavior of it. The finite element analysis results have a good agreement with the experimental test results, and a new prediction model was proposed. Yu et al. [19] applied the beam finite element method to analyzing axial tensile properties of the 91-wire strand. By comparing with the experiment results, the beam FEM could be used to predict the tensile properties of the steel wire rope. Song et al. [20] analyzed distributions of stress and deformation in the braided wire rope subjected to torsional loading. He found that the wires in the strands have the tendency to be screwed tightly and are in a stretched state when the lay direction of the strand coincides with its torsion direction. Cao and Wu [21] established the finite element model of wire ropes with different structural parameters and analyzed the stress distribution and deformation under cantilever beam state. The accuracy of the results of finite element analysis was slightly lower than the theoretical calculation results. Du et al. [22] presented a simulation of the 6 × 36 + WS RHRL wire rope. It is found that the stress of the wire rope was uneven, and the maximum stress occurs at the side of the wire. Yong et al. [23] conducted a finite element analysis of the IWRC636WS wire rope, and the elastic behavior of the wire rope under tensile loads was simulated. It is reported that nonlinear relationship between the axial tension and the axial elongation of the wire rope. Cen et al. [24] found effective simplified finite element analysis method by combining finite element method with experimental test. This method can be used to analyze the characteristics of the Polycal WRI. The above studies have studied the characteristics of wire ropes and vibration isolators by experiments and finite element methods and obtained some results. Considering the complexity of the wire rope isolator structure, there is less research on the relationship between the structural parameters of the WRI and the stiffness and damping characteristics of the WRI. Therefore, it is necessary to study the relationship between them, and provide guidance for practical engineering applications.

In this paper, the stiffness and damping characteristics of WRIs with different structural parameters were investigated. These structural parameters were number of wire ropes, material of wire, rope diameter (D), rope lay pitch (), single wire rope diameter (d), single wire strand lay pitch (), and wire rope diameter ratio (nr). A stiffness-damping prediction model consists of structural parameters of the Polycal WRI were established, which aims to provide powerful help for the structural design and wire rope selection of the Polycal WRI.

The energy dissipation coefficient is a key parameter evaluating the effective vibration isolation property of a WRI. It is an important reference for evaluating the damping characteristics of the WRI. Because of sliding friction between the wire strands and the internal friction of wires, the isolators exhibit nonlinear hysteretic behavior. Typical load-displacement curve of the WRI is shown in Figure 1. The damping characteristics of the WRI are related with the area which is enclosed by the loading and unloading curve of the WRI under compression. The energy dissipation coefficient C was calculated as follows:where Aloop was the area of the hysteresis loop (N·mm), Fmax and Fmin were the maximum and minimum loads (N), respectively, of the WRI in the compression loading-unloading process. Xmax and Xmin were the maximum and minimum displacement (mm) in the loading-unloading process.

In most of the wire rope isolators, during the load-bearing process, the upper and lower pallets are mainly supported by the curved steel wire rope, and the bending stiffness and deformation process of the steel wire rope play a decisive role. Therefore, this paper mainly uses the stiffness and energy dissipation coefficient as indicators to measure the effectiveness of the wire rope isolators.

As shown in Figure 2(a), the WRI was composed of two pallets and twelve 6 × 19 IWS wire ropes. In this paper, the simplified finite element method is used to obtain the WRI load-displacement hysteresis loop, and the WRI stiffness damping of different structural parameters is discussed. We have referenced the simplified finite element method which was established by Cen et al. [24]. This method mainly simplified the single strand into a single wire. The 6 × 19 IWS wire rope was simplified into the 1 × 7 wire rope, as presented in Figure 2(b). Based on the simplified method, this paper studies the stiffness and damping characteristics of the isolators with different structural parameters and establishes the prediction model of the stiffness damping of the wire rope isolator with structural parameters as variables.

This paper is mainly based on the GGQ-99 Polycal WRI. By changing structural parameters, the diameter ratio and lay pitch of the single strand and lay pitch and bending radius of the wire rope, different finite element models were set.

In this presented model, the data source of the simulation of the WRIs refers to papers of Cen et al. [24], Jiang et al. [25], and Erdonmez and Imrak [26]. The material properties of the center and side wires are defined by the bilinear elastic-plastic kinematic hardening model in the ABAQUS material library, as shown in Table 1. By compression of corresponding strands, the max equivalent compression stress of the strand and equivalent compression elastic modulus are equal to and Ep, respectively. Ee is equal to the equivalent tension elastic modulus which is measured by the tension of the strands. The density is ρ = 7850 kg·m−3, and the Poisson’s ratio is μ = 0.3 [24].

The stiffness of the WRI determines the load-bearing capacity of the vibration isolation system, regardless of whether the WRI is subjected to a static load or a strong impact load. The softening load of the WRI and the subsequent softening stiffness both affect the efficiency of vibration isolation and stability of the entire isolator system. The damping characteristic reflects the ability to absorb shock vibration energy of the isolator in the vibration isolation system. There are many factors that affect the static stiffness and damping characteristics of the WRI, including the selection of the wire rope, number of wire ropes, material of steel wire, wire rope diameter (D), rope lay pitch (), single wire rope diameter (d), single wire strand lay pitch (), wire rope diameter ratio (nr), and arc wire rope bending radius (R).

As shown in Figure 3, the diameter ratio (nr) of the 1 + 6 + 12 center strand or the lay strand is defined as follows:where rc and rs are the diameters of the center wire and lay wire in the single strand, respectively.

Figure 3 shows the 1 + 6 + 12 single-strand wire rope. It was stipulated that the 1 + 6 + 12 single-strand wire rope has the same other structural parameters; the first layer wire pitch length was 6 times the diameter of the single wire rope, and the second layer wire pitch length was 11 times the diameter of the single wire rope. The diameter of the wire rope was 8 mm in the study of the GGQ-99 Polycal WRI. The diameter of the center strand was 2.839 mm, and the diameter of the lay strand was 2.581 mm. Obviously, the former was 1.1 times more than the latter. The lay pitch length was 60 mm (7.5 times diameter of the wire rope), and the bending radius was 46.5 mm of the arc wire rope. The diameters of the center wire and lay wire in different strands with different diameter ratios of the GGQ-99 are listed in Table 2.

According to the simplified FEM model, the tensile and compression of the single strand with different diameter ratios were calculated. The elastic tensile and compression modulus and compression ultimate load of the single strand were obtained. These mechanical parameters were used to calculate the stiffness-damping characteristics of the WRI. It is presented in Table 3. It could be seen that the elastic tensile modulus significantly reduced with increased diameter ratio. But the elastic compression modulus increased with increased diameter ratio. The compression ultimate load is kept steady basically with increased diameter ratio. The reason is that the compression ultimate load indicated the friction properties between the center wire and lay wire. The friction between the center wire and lay wire was retained about the same during calculating the model with different diameter ratios. So, the compression ultimate loads showed little changes.

According to the simplified FEM model, the compression loading-unloading processes of the GGQ-99 WRI with different diameter ratios were simulated. Different load-displacement hysteresis loop curves of the WRI are shown in Figure 4. The ratio between the prestiffness K1 and softened stage stiffness K2 indicated the impact resistance for the WRI. The smaller this value, the better the impact resistance. The energy dissipation coefficient was used to evaluate the damping characteristic. The higher this value, the better the damping characteristic. The results are shown in Figure 5.

As shown in Figure 4, the compression load of the WRI increased with increasing of the diameter ratio of the wire strand. This result is related to the elastic compression modulus of the single strand. As shown in Figure 5, the ratio of K1 to K2 was increased with increasing of the diameter ratio of the wire strand. The ratio of K1 to K2 reached the minimum when the diameter ratio was equaled to 1.1. It means that the GGQ-99 WRI was easier to maintain the stability of the vibration isolation system through large deformation. The energy dissipation coefficient for the WRI decreased with increasing of the diameter ratio of the wire strand. When the ratio of the strand was equaled to 1.1, the energy dissipation coefficient reached maximum. These results indicate that the Polycal WRI has better damping characteristics, which could effectively consume the impact load and eliminate the vibration from the isolation system.

Based on the diameter ratio of the wire strand to 1.1, the main purpose of this section is to study the effect of the outer layer side wire pitch length () on the stiffness-damping of the Polycal WRI. During the process of creating the simulation model, the first layer side wire of the strand steel wire rope () was unchanged and equal to 6 times the diameter of the wire strand. The was 7 times, 8 times, 9 times, 10 times, and 11 times the diameter of the wire strand. The relation between the pitch length and diameter of the wire strand (d) is expressed in equation (3). The geometric dimensions of the single wire strands with different pitch lengths are shown in Table 4.

As shown in Table 5, the equipment tensile modulus, compression modulus, and softened stress of the wire strands with different were obtained by axial tension and compression. The modulus of the tension was continuously increased with increasing of the outer layer side wire pitch. The modulus of the compression had a small variation with increasing of the outer layer side wire pitch basically, and the maximum load of the corresponding compression process decreased.

The equipment tensile and compression performance of wire strands with different were used to define the bilinear elastic-plastic kinematic hardening material properties of the center and lay strand assembled in the GGQ-99 WRI. As shown in Figure 6, the load-displacement hysteresis loops of different lay pitches had a small variation. Besides, the modulus of the compression was not changing with increasing of the outer layer side wire pitch. Combined stiffness-damping characteristics of the GGQ-99 WRI with the different wire strand pout are shown in Figure 7. When the was 11 times the diameter of the wire strand, the ratio of K1 to K2 reached the minimum. At the same time, the Polycal WRI had large prestiffness and the most obvious softening characteristics, not only could withstand large loads but also could easily maintain the stability of the vibration isolation system through large deformation under the action of large loads. The energy dissipation coefficient of the WRI remained basically unchanged, when the ratio of the outside lay pitch and the diameter of the strand increased.

In the process of compression loading-unloading of the Polycal WRI, not only the slippage of the wires exists in the strand but also the overall slippage of the strands in the rope. Therefore, the influence rule of the pitch length on the wire rope is discussed in this section. The diameter ratio, the inside layer wire pitch length and outside layer wire pitch, was equaled to 1.1. It was 6 times the diameter of the wire strand and 11 times the diameter of the wire strand, respectively. The relation between the pitch length and diameter of the wire rope (D) is expressed in equation (4). Table 5 lists the geometric dimensions of the single wire strands with different pitch lengths. The load-displacement hysteresis loops of the GGQ-99 WRI with different pitch lengths are shown in Figure 8.

As shown in Figure 8, the compression load of the WRI increased with increasing of the pitch length of the wire rope. The increase of the pitch length contributed to the increase of the angle between the center strand and lay strand. The bearing axial load of the lay strand increased with angle between center strand and lay strand decreasing. So, the compression load of the WRI was increased with the increasing of the pitch length of the wire rope.

The stiffness-damping characteristics of the GGQ-99 WRI with different pitch lengths of wire ropes are shown in Figure 9. As shown in Figure 9, both the ratio of K1 to K2 and the energy dissipation coefficient of the WRI fluctuated with the increase of the pitch length of the arc rope. When the rope pitch was equaled to 7.5 times the diameter of rope, the ratio of K1 to K2 was the smallest and less than 0.2 and the energy dissipation coefficient was the biggest.

The characteristics of the Polycal WRI depend on the structure of the wire rope, including the diameter of the single strand, the pitch length of the single strand, and the bending radius of the wire rope. In this section, the influence of the bending radius (R) of the arc rope on the stiffness-damping characteristics of the Polycal WRI is studied. The diameter ratio of the wire strand was 1.1. The inside layer wire pitch length was 6 times the diameter of the wire strand. The outside layer wire pitch length was 11 times the diameter of the wire strand, and the pitch length of the wire rope was 7.5 times its diameter. The bending radius was equal to 46.5 mm, and the bending radius of the wire rope was 50 mm, 55 mm, 60 mm, and 65 mm, respectively. The FEM models of the GGQ-99 WRI with different bending radii are shown in Figure 10. The load-displacement hysteresis loops of the GGQ-99 WRI with different bending radii of arc ropes are shown in Figure 11.

As shown in Figure 11, the compression load of the WRI increased with increasing bending radius of arc ropes. Because the compression load of the WRI was inversely proportional to the curvature of the wire rope, the curvature of the wire rope decreased with increasing bending radius of arc ropes. The compression load of the WRI increased with increasing bending radius of arc ropes.

The stiffness-damping characteristics of the GGQ-99 WRI with different bending radii of the wire rope are shown in Figure 12. The ratio of K1 to K2 increased with increasing bending radius. However, the energy dissipation coefficient of the WRI decreased with increasing bending. When the bending radius was equal to 46.5 mm, the ratio of K1 to K2 was the smallest and the energy dissipation coefficient was the biggest.

In conclusion, the stiffness-damping characteristics were the best; when the diameter ratio of the wire strand was 1.1, the inside layer wire pitch length was 6 times the diameter of the wire strand, the outside layer wire pitch length was 11 times the diameter of the wire strand, and the pitch length of the wire rope was 7.5 times its diameter. The bending radius was equal to 46.5 mm.

In the previous section, the influence rules of the diameter ratio of the wire strand (nr), the pitch length of the wire strand (), the pitch length of the wire rope (P), and the bending radius (R) for the stiffness-damping performance of the Polycal WRI were discussed. The prediction model of the stiffness-damping characteristic of the WRI was established by using the dimensionless diameter ratio of the wire strand (nr), the pitch length of the wire strand (), the pitch length of the wire rope (P), and the bending radius (R). The theo