wire rope anti vibration mounts free sample

To ensure safe and continuous operation, or for instance flawless and safe transport of (highly) sensitive equipment, adequate shock and vibrationprotection is essential. The adequate level of protection is typicallypredominated by combining the appropriate shock mounts, thoroughcalculation and understanding of the application. The advantage of a wire rope isolators (WRI)lies in its ability to combine a high levelof isolation while taking up relatively little space. WRI are captive by theirconstruction and may, for this reason, be loaded in any direction withoutthe risk of malfunctioning. WRI are not subject to aging due to externalfactors such as oil, saltwater, chemicals, and heat or cold. Mostapplications of WRI can be found in situations where equipment needs tobe mounted against shocks or vibration, but where sound isolation is ofminor importance.

Our R&D work on GG Series All-Metal Wire Cable Vibration Isolator started in year 1983. In 1990, the product was listed as one of top national R&D achievements.

On top of the R&D work, we also took the leadership in making several military standard for electronic and marine industry, i.e., The General Specifications For All-Metal Wire Cable Vibration Isolator (SJ20593-96) and Specification For Wire-Cable Vibration Isolator Of Ships (GJB6412-2008),Which was published on 1st Octoboer.2008.

This product can maintain good vibration isolation performance under maximum safe shock (including earthquake). It can work in all kinds of adverse working environment classified by national as well as international military standard. It comes with long life span and can adapt to displacement in all dimensions. Various installation methods can be adopted.

This product can maintain good vibration isolation performance under maximum safe shock. It can work in all kinds of adverse working environment defined by national as well as international military standard.

The vibration and noise emitting from the machines and equipment in operation may appear to be harmless on the surface. The people may get perturbed by the noise but may get used to working in the noisy industrial environment over a period of time. However, vibration and noise are the most destructive agents in the industrial environment and their effects are known in the form of machine breakdowns, fatigue failures, and health deterioration in human beings. By the time we realize these damages it is already too late. Products in the form of vibration wire rope isolators and rubber vibration dampening mounts are available today to stem the vibrations and prevent them from causing damage. Let us look at these products.

Wire cable isolators: The vibration isolation wire rope plays the crucial role in the selection of the right kind of isolator for the equipment. If you choose the right wire

characteristics like the wire diameter, number of strands, wire length, wire twist, and the number of strands per section you can get the wire isolator that is most suited for your requirement. Sufficient literature is available onsite to help you make this choice. It is right to call them as wire rope insulators as they shield the equipment from the harmful effects of vibration. As a passive vibration insulation system, the wire isolators require no maintenance, occupy little space, and perform even in changing temperature conditions and harsh environments.

Rubber mounts and isolators: The rubber mounts for vibrations are crucial components in the machinery and equipment, and help in dampening the noise levels and vibrations while safeguarding the sensitive parts from the impact of the external vibrations.

Rubber mounts with studs: These types of rubber vibration absorbers are compact and highly effective in applications like compressors, pumps, motors, generators, and air conditioners. The stud type rubber vibration dampers can be used for load applications in both compression and shear.

Rubber shock mounts: The shock mount type rubber vibration isolator is designed to absorb shock for static equipment. Another product in the rubber vibration isolation mounts category is suitable for the marine application such as propulsion engines and diesel generator sets where damping of low frequencies is required.

Rubber vibration bushings: The cylindrical metal to rubber bonded bushings are used where shock absorption, noise reduction, and elimination of lubrication is required. Some of the applications include wheel suspensions and vibratory feeders.

As a leading rubber mount manufacturer, Andre HVAC International Inc. has led the way to develop solutions to isolate vibrations and reduce noise over the past 13 years. They not only have a wide range of wire rope ISO mounts and rubber vibration isolation mountsbut also partner with you in developing a new application or capitalizing on their existing technology. You can be sure of finding the answer to your vibration damping needs from them.

People who are aware of the damage caused by vibrations always include anti-vibration products in their portfolio, whenever they are creating a new infrastructure or installing a new machine or a piece of equipment. The preference is always been for products that are fit and forget type, requiring the least possible maintenance and care. One such product is the nimble wire rope isolator anti-vibration mount. The product is very rugged and a silent performer.

The wire isolators exhibit non-linear stiffness behavior. The type of deflection will help in the selection of the wire rope insulators. The spring rate is different for larger shock deflections and small deflections. The average stiffness values of the wire isolators for full loop versions are normally listed on the website or catalogues. The damping values are typically around 10 per cent, depending on the input level and size. In the case of unstable high structures, it is recommended to use stabilizers. A typical example is a piece of equipment where the height is more than twice the base width.

In the places where there is a limitation of space, the compact wire rope isolators provide the ideal solution. As the name suggests, these vibrationwire rope isolators provide the cost-efficient, shock and vibration isolation in cringed spaces. The single point installation makes it easy for the compact wire rope isolators to be installed in precise and sensitive applications like electronics and lab equipment. The compact vibration wire rope isolators provide the adequate reliability that is unaffected by temperature or substrate requirements.

The wire rope isolator CAD models are available for download from a number of websites. It is also possible to join forums for the model downloads.  The CAD modeling makes it easy to select the wire rope isolator suited for the required application. The armed forces have the requirement of the wire rope isolator for vibration damping in rough terrains and in heavy-duty applications. They can counter the impacts from collisions and poor road conditions. You will also find them in shipping containers, aircraft, and medical equipment etc. While in the air they can withstand high-G maneuvering, turbulent air and hard landings. The wire cable isolators are free from creeping or ageing and have a long lifespan. It is also possible to do quick and economical prototyping for specific requirements.

The wire rope isolator anti-vibration product can be used in a variety of load conditions that include compression, shear, and rolling mode etc. The wire isolators also withstand the combination of loads like the 45-degree compression and rolling. The cable that is looped through the retaining bars is responsible for the elasticity in the wire rope isolators giving it the spring function. On the other hand, the relative friction between the strands of the wire rope provides the damping function in thewire rope isolator. To get the right kind of performance and for proper selection of the wire rope isolator for vibration damping, it is important to understand the spring behavior and damping function.

Andre HVAC International Inc. is a leading supplier of a diversified range of wire rope isolators for vibration damping. It provides customized technology solutions and highly engineered wire rope isolators for the growing industrial markets in the world. The solutions from AHI are well accepted and recognized as the preferred products for vibration isolation. The customized solutions have performed well in challenging applications and harsh industrial environments.

As a leading specialist in rubber vibration mounts, we offer our extensive expertise using a step by step guide to help you choose the correct rubber mounts. Read on to read our easy to follow guide to choosing the best anti-vibration mount to suit you.

Anti-vibration mounts are fastened to machines to eliminate vibration and noise. Machinery vibration from equipment can be transferred to the supporting structure and travel large distances to be emitted as noise elsewhere in a building or structure. The mounts are typically made of rubber or a combination of rubber and other materials. Rubber vibration mounts are particularly effective in preventing the transfer of vibrations that machines generate.

Anti-vibration mounts have excellent shock absorption and vibration dampening properties. Pieces of equipment and machinery subjected to noise, shocks and vibrations can be extremely damaged, affecting their lifespan, efficiency and safety. An increased risk of damage can often lead to more frequent repairs and replacements, increasing costs for the company or individual. With this in mind, it’s not surprising that these mounts are so widely used, found in industries ranging from the defencesector to renewable energy and power generation.

For example, if the machinery weighs 340 kg, the equipment would require rubber mounts with a weight of 85 kg each if four mounts were purchased to distribute the weight evenly. Check the centre of gravity to ensure an even distribution of load as different mounts may be required in different locations.

Static deflection is simply the amount that a vibration dampening mount compresses under the weight of the equipment. The more static deflection, the more work the mount has to do. For example, if a spring is 10 cm high when unloaded and compresses to 9 cm when carrying the weight of the equipment, the static deflection is 1 cm. This is how static deflection is calculated.

Take into account specific application requirements and the reduction in vibration required. Graphs showing vibration isolation against deflection can be used to determine the levels of vibration reduction – please contact us for guidance or further details.

Rubber vibration isolation mounts have several benefits and offer great overall value for money. They not only serve to protect the machinery by reducing the impact of machines power but also benefit the life of equipment, vehicles and structures. Without rubber vibration mounts on the machinery, the sheer impact of the vibrations can cause weakening and even result in failure. It is, therefore, crucial to protect not only your equipment but also the well-being of the workers using the machinery with suitable mountings. Vibration damping mounts are easy to install and are available in a variety of sizes, designs and load capabilities.

By utilising the correct type of mount, you can increase the lifespan of machinery whilst reducing the adverse effects of vibration, noise and shock. GMT design, manufacture and supply a wide variety of specialised mounts, offering both stock and custom solutions for a multitude of industrial applications:

Vibration isolators have many applications, such as in machinery for the food and pharmaceutical industries. Specific examples of use include heating and ventilation equipment, fans and power generators.

Unlike vibration isolators, rubber mountingscan provide vibration and shock protection in three separate directions. They also provide high levels of resistance to grease and oil, making them a popular choice in both the automotive and marine industry. Rubber vibration mounts are often found in both engines and generators.

Corrosion-resistant and completely manufactured from stainless steel, our specialist selection of wire rope mounts are designed to withstand the toughest environments. They isolate shock and vibrations from all directions and offer a maintenance-free solution to the most demanding tasks.

This resilience makes our range of wire rope mounts ideal for military use, certified to standards MIL-STD-167 for vibration, MIL-STD-810 for environmental conditions and MIL-S-901 for shock. They can be found in rough terrain vehicles, aircraft and vehicle carriers.

Conical mounts are also referred to as rubber cone mounts. With the correct washers, these mounts are suited to both compression and shear loadings. Featuring a failsafe capacity and a high load capacity, they are designed to suit mobile applications for the automotive, commercial vehicle and marine industries.

Machine feetwork to reduce vibrations whilst dampening shock loads. With the option of rebound control and a variety of rubber hardness options to suit each application, it isn’t difficult to see why machine feet are used so extensively in industries such as renewable energy, power generation and agriculture and forestry. Common applications include marine mountings, engine mountings and generator mountings.

As a leading specialist in rubber vibration mounts, we have a number of trusted advisers who can help you with finding the best vibration isolation mounts to suit your requirements. If you do need further guidance regarding any of our specialist anti-vibration mountings or to enquire about our bespoke service, please don’t hesitate to get in touch today.

A wire rope isolator is a very high performance shock absorber and vibration isolator that can used in endless applications. Wire rope isolators are very useful vibration dampers because they maintain excellent vibration isolation performance under maximum shock in severe environmental conditions such as chemical pollution or extreme temperatures. They have a long life span and can adapt to elastic displacement in all dimensions, allowing multi-directional vibration isolation and they can be installed in many different ways.

There is elastic support 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 maximum dynamic displacement is over 70 percent of the space the mount takes up, the dynamic stiffness decreases when the displacement increases.

Vibration is undesirable in many domains, primarily engineered systems and habitable spaces, and methods have been developed to prevent the transfer of vibration to such systems. Vibrations propagate via mechanical waves and certain mechanical linkages conduct vibrations more efficiently than others. Passive vibration isolation makes use of materials and mechanical linkages that absorb and damp these mechanical waves. Active vibration isolation involves sensors and actuators that produce disruptive interference that cancels-out incoming vibration.

"Passive vibration isolation" refers to vibration isolation or mitigation of vibrations by passive techniques such as rubber pads or mechanical springs, as opposed to "active vibration isolation" or "electronic force cancellation" employing electric power, sensors, actuators, and control systems.

Passive vibration isolation is a vast subject, since there are many types of passive vibration isolators used for many different applications. A few of these applications are for industrial equipment such as pumps, motors, HVAC systems, or washing machines; isolation of civil engineering structures from earthquakes (base isolation),

These are bladders or canisters of compressed air. A source of compressed air is required to maintain them. Air springs are rubber bladders which provide damping as well as isolation and are used in large trucks. Some pneumatic isolators can attain low resonant frequencies and are used for isolating large industrial equipment. Air tables consist of a working surface or optical surface mounted on air legs. These tables provide enough isolation for laboratory instrument under some conditions. Air systems may leak under vacuum conditions. The air container can interfere with isolation of low-amplitude vibration.

These are heavy-duty isolators used for building systems and industry. Sometimes they serve as mounts for a concrete block, which provides further isolation.

The focus on negative-stiffness isolators has been on developing systems with very low resonant frequencies (below 1 Hz), so that low frequencies can be adequately isolated, which is critical for sensitive instrumentation. All higher frequencies are also isolated. Negative-stiffness systems can be made with low stiction, so that they are effective in isolating low-amplitude vibrations.

Tuned mass dampers reduce the effects of harmonic vibration in buildings or other structures. A relatively small mass is attached in such a way that it can dampen out a very narrow band of vibration of the structure.

In less sophisticated solutions, bungee cords can be used as a cheap isolation system which may be effective enough for some applications. The item to be isolated is suspended from the bungee cords. This is difficult to implement without a danger of the isolated item falling. Tennis balls cut in half have been used under washing machines and other items with some success. In fact, tennis balls became the de facto standard suspension technique used in DIY rave/DJ culture, placed under the feet of each record turntable which produces enough dampening to neutralize the vibrations of high-powered soundsystems from affecting the delicate, high-sensitivity mechanisms of the turntable needles.

Every object on a flexible support has a fundamental natural frequency. When vibration is applied, energy is transferred most efficiently at the natural frequency, somewhat efficiently below the natural frequency, and with increasing inefficiency (decreasing efficiency) above the natural frequency. This can be seen in the transmissibility curve, which is a plot of transmissibility vs. frequency.

Here is an example of a transmissibility curve. Transmissibility is the ratio of vibration of the isolated surface to that of the source. Vibrations are never eliminated, but they can be greatly reduced. The curve below shows the typical performance of a passive, negative-stiffness isolation system with a natural frequency of 0.5 Hz. The general shape of the curve is typical for passive systems. Below the natural frequency, transmissibility hovers near 1. A value of 1 means that vibration is going through the system without being amplified or reduced. At the resonant frequency, energy is transmitted efficiently, and the incoming vibration is amplified. Damping in the system limits the level of amplification. Above the resonant frequency, little energy can be transmitted, and the curve rolls off to a low value. A passive isolator can be seen as a mechanical low-pass filter for vibrations.

In general, for any given frequency above the natural frequency, an isolator with a lower natural frequency will show greater isolation than one with a higher natural frequency. The best isolation system for a given situation depends on the frequency, direction, and magnitude of vibrations present and the desired level of attenuation of those frequencies.

All mechanical systems in the real world contain some amount of damping. Damping dissipates energy in the system, which reduces the vibration level which is transmitted at the natural frequency. The fluid in automotive shock absorbers is a kind of damper, as is the inherent damping in elastomeric (rubber) engine mounts.

Passive isolation operates in both directions, isolating the payload from vibrations originating in the support, and also isolating the support from vibrations originating in the payload. Large machines such as washers, pumps, and generators, which would cause vibrations in the building or room, are often isolated from the floor. However, there are a multitude of sources of vibration in buildings, and it is often not possible to isolate each source. In many cases, it is most efficient to isolate each sensitive instrument from the floor. Sometimes it is necessary to implement both approaches.

In Superyachts, the engines and alternators produce noise and vibrations. To solve this, the solution is a double elastic suspension where the engine and alternator are mounted with vibration dampers on a common frame. This set is then mounted elastically between the common frame and the hull.

Magnetism: Some experimentation which requires vibration isolation also requires a low-magnetism environment. Some isolators can be designed with low-magnetism components.

Acoustic noise: Some instruments are sensitive to acoustic vibration. In addition, some isolation systems can be excited by acoustic noise. It may be necessary to use an acoustic shield. Air compressors can create problematic acoustic noise, heat, and airflow.

is basically the weight of the isolated object with low-amplitude vibration input. This is the environment of apparently stationary objects such as buildings (under normal conditions) or laboratory instruments.

involves accelerations and larger amplitude shock and vibration. This environment is present in vehicles, heavy machinery, and structures with significant movement.

Cost of providing isolation: Costs include the isolation system itself, whether it is a standard or custom product; a compressed air source if required; shipping from manufacturer to destination; installation; maintenance; and an initial vibration site survey to determine the need for isolation.

Relative costs of different isolation systems: Inexpensive shock mounts may need to be replaced due to dynamic loading cycles. A higher level of isolation which is effective at lower vibration frequencies and magnitudes generally costs more. Prices can range from a few dollars for bungee cords to millions of dollars for some space applications.

Frequencies: If possible, it is important to know the frequencies of ambient vibrations. This can be determined with a site survey or accelerometer data processed through FFT analysis.

Amplitudes: The amplitudes of the vibration frequencies present can be compared with required levels to determine whether isolation is needed. In addition, isolators are designed for ranges of vibration amplitudes. Some isolators are not effective for very small amplitudes.

Vibration specifications of item to be isolated: Many instruments or machines have manufacturer-specified levels of vibration for the operating environment. The manufacturer may not guarantee the proper operation of the instrument if vibration exceeds the spec.

Not For Profit Organizations such as ASHRAE (American Society of Heating, Refrigerating and Air-Conditioning Engineers) and VISCMA (Vibration Isolation and Seismic Control Manufacturers Association) provide specifications / standards for isolator types and spring deflection requirements that cover a wide array of industries including electrical, mechanical, plumbing, and HVAC.

Negative-Stiffness-Mechanism (NSM) vibration isolation systems offer a unique passive approach for achieving low vibration environments and isolation against sub-Hertz vibrations. "Snap-through" or "over-center" NSM devices are used to reduce the stiffness of elastic suspensions and create compact six-degree-of-freedom systems with low natural frequencies. Practical systems with vertical and horizontal natural frequencies as low as 0.2 to 0.5 Hz are possible. Electro-mechanical auto-adjust mechanisms compensate for varying weight loads and provide automatic leveling in multiple-isolator systems, similar to the function of leveling valves in pneumatic systems. All-metal systems can be configured which are compatible with high vacuums and other adverse environments such as high temperatures.

These isolation systems enable vibration-sensitive instruments such as scanning probe microscopes, micro-hardness testers and scanning electron microscopes to operate in severe vibration environments sometimes encountered, for example, on upper floors of buildings and in clean rooms. Such operation would not be practical with pneumatic isolation systems.

The theory of operation of NSM vibration isolation systems is summarized, some typical systems and applications are described, and data on measured performance is presented. The theory of NSM isolation systems is explained in References 1 and 2.

A six-DOF NSM isolator typically uses three isolators stacked in series: a tilt-motion isolator on top of a horizontal-motion isolator on top of a vertical-motion isolator. Figure 3 shows a schematic of a vibration isolation system consisting of a weighted platform supported by a single six-DOF isolator incorporating the isolators of Figures 1 and 2. Flexures are used in place of the hinged bars shown in Figure 1. A tilt flexure serves as the tilt-motion isolator. A vertical-stiffness adjustment screw is used to adjust the compression force on the negative-stiffness flexures thereby changing the vertical stiffness. A vertical load adjustment screw is used to adjust for varying weight loads by raising or lowering the base of the support spring to keep the flexures in their straight, unbent operating positions.

The equipment or other mechanical components are necessarily linked to surrounding objects (the supporting joint - with the support; the unsupporting joint - the pipe duct or cable), thus presenting the opportunity for unwanted transmission of vibrations. Using a suitably designed vibration-isolator (absorber), vibration isolation of the supporting joint is realized. The accompanying illustration shows the attenuation of vibration levels, as measured before installation of the functioning gear on a vibration isolator as well as after installation, for a wide range of frequencies.

This is defined as a device that reflects and absorbs waves of oscillatory energy, extending from a piece of working machinery or electrical equipment, and with the desired effect being vibration insulation. The goal is to establish vibration isolation between a body transferring mechanical fluctuations and a supporting body (for example, between the machine and the foundation). The illustration shows a vibration isolator from the series «ВИ» (~"VI" in Roman characters), as used in shipbuilding in Russia, for example the submarine "St.Petersburg" (Lada). The depicted «ВИ» devices allow loadings ranging from 5, 40 and 300 kg. They differ in their physical sizes, but all share the same fundamental design. The structure consists of a rubber envelope that is internally reinforced by a spring. During manufacture, the rubber and the spring are intimately and permanently connected as a result of the vulcanization process that is integral to the processing of the crude rubber material. Under action of weight loading of the machine, the rubber envelope deforms, and the spring is compressed or stretched. Therefore, in the direction of the spring"s cross section, twisting of the enveloping rubber occurs. The resulting elastic deformation of the rubber envelope results in very effective absorption of the vibration. This absorption is crucial to reliable vibration insulation, because it averts the potential for resonance effects. The amount of elastic deformation of the rubber largely dictates the magnitude of vibration absorption that can be attained; the entire device (including the spring itself) must be designed with this in mind. The design of the vibration isolator must also take into account potential exposure to shock loadings, in addition to the routine everyday vibrations. Lastly, the vibration isolator must also be designed for long-term durability as well as convenient integration into the environment in which it is to be used. Sleeves and flanges are typically employed in order to enable the vibration isolator to be securely fastened to the equipment and the supporting foundation.

Branch pipe a of isolating vibration is a part of a tube with elastic walls for reflection and absorption of waves of the oscillatory energy extending from the working pump over wall of the pipe duct. Is established between the pump and the pipe duct. On an illustration is presented the image a vibration-isolating branch pipe of a series «ВИПБ». In a structure is used the rubber envelope, which is reinforced by a spring. Properties of an envelope are similar envelope to an isolator vibration. Has the device reducing axial effort from action of internal pressure up to zero.

Active vibration isolation systems contain, along with the spring, a feedback circuit which consists of a sensor (for example a piezoelectric accelerometer or a geophone), a controller, and an actuator. The acceleration (vibration) signal is processed by a control circuit and amplifier. Then it feeds the electromagnetic actuator, which amplifies the signal. As a result of such a feedback system, a considerably stronger suppression of vibrations is achieved compared to ordinary damping. Active isolation today is used for applications where structures smaller than a micrometer have to be produced or measured. A couple of companies produce active isolation products as OEM for research, metrology, lithography and medical systems. Another important application is the semiconductor industry. In the microchip production, the smallest structures today are below 20 nm, so the machines which produce and check them have to oscillate much less.

US4397069A, Camossi, "Device and process for the manufacture of vibration-damping and shockproof mountings incorporating at least one helically arranged metal cable and mounting thereby obtained", published 1983

Platus PhD, David L., SPIE International Society of Optical Engineering - July 1999, Optomechanical Engineering and Vibration Control Negative-Stiffness-Mechanism Vibration Isolation Systems

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.

This will give you an idea of how many mounts you’ll need, or the size of those mounts. The heavier the machine, the larger the mounts – or number of mounts – will be required.

Let’s say your machine weighs 800 lbs. and you’ll be using four mounts. If the weight of the machine is distributed equally, you’ll want mounts weighing 200 pounds each. If the machine’s weight is not distributed equally, you’ll want heavier mounts where it’s needed.

This is how much your mount will compress under the weight of the machine. Using the chart below, let’s return to your machine that weighs 800 lbs, including the fan. Your degree of vibration isolation is 85%. Let’s now say the machine’s fan works at a speed of 1400 RPMs. Draw a line on the chart starting at 1400 RPMs and go across until you hit the 85% diagonal line. Now draw the line straight down. You’ll land on 3.5mm at the bottom. That’s your static deflection.