wire rope drum groove design made in china

Crane drum is the component to wind wire rope in the lifting mechanism.Cranedrum consists of drum shaft, flange type annular gear,drum hub,bearings,bearing pedestal.

When one end of drum is equipped with the switch of rotary type position limitation limiter,it must ensure to make drum shaft and rising limit switch rotate synchronously.

Modern Crane co.,Ltd.focuses on lifting resolutions for customers .We provide design ,production and service of different lifting equipment ,which covers electric wire rope hoist ,china hoist ,jib crane ,bridge crane ,gantry crane ,port crane etc.

Crane Drum for Electrical Winch and Hoist Just as the crane wheel is the most vulnerable part in traveling unit, the rope drums are also a vulnerable part in hoisting part due to the long-time wear of grooves. Besides, when the rope drum is worn out, the wire rope will be worn out quickly, which is very dangerous....

Crane Lifting Hook A lifting hook is a device for grabbing and lifting loads by means of a device such as a hoist or crane. A lifting hook is usually equipped with a safety latch to prevent the disengagement of the lifting wire rope sling, chain or rope to which the load is attached.

Crane Wire Rope, Made of High-toughness Steel Wires Wire rope is a preferred lifting device for many reasons. It is a more important Crane Parts. Its unique design consists of multiple steel wires that form individual strands laid in a helical pattern around a core. This structure provides strength, flexibility, and...

The crane rail is what guides a crane to travel along the pre-designated route while transferring pressure energy coming from wheels to the foundation where the rail is built. It mainly comes in three types: heavy, light and specialized. Advantages 1. Maximum load bearing capacity: 120t 2. Light weight and high...

Double Girder Gantry Crane Description Leading Technology and Reliable Performance Compact Structure and Modular Design for Optimized Customer Investment Environmentally Sustainable Design for Space-and Energy-Saving Safe, Reliable, and Easy-to-Maintain Packing and Shipping Packing: 1. Electrical components, trolleys...

Long Distance Wireless Remote Control The Gantry Crane remote control has a flexible operating distance, which allows the operator to observe the working status of the spreader within an appropriate distance, facilitates communication with other operators, and can participate in the operation of the cable, thereby...

Best selling workshop used steel drumsXinxiang Degong Machinery Co., Ltd is located in Xinxiang City Henan Province, the biggest crane manufacturing base in China. Specialized in crane design and manufacturing, we have passed ISO 9001:2000, CE, SGS.

When one end of drum is equipped with the switch of rotary type position limitation limiter,it must ensure to make drum shaft and rising limit switch rotate synchronously.

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Product specifications: custom design based on the requirements wire rope diameter (mm) the main drum diameter (mm) the main drum length (mm) drum groove rotation: lefthand �righthand processing equipment: cnc machining center product material: nylon polymer, carbon steel, all kinds of high-strength steel q345, q420, q460, 20grmo, 42grmo, etc product application: 1. The petroleum industry: petroleum drilling rig, petroleum tractor hoist, petroleum workover rig, trailermounted pumping unit winch , etc 2. Crane: the bridge lifting machine, tower crane 3. The hoist: building wipe wall machine, winding machine 4. Engineering machinery: tower crane, piling machine 5. Marine machinery: offshore petroleum crane winch, drawworks and hoist product advantage: lebus grooved drum, solve the mess in the process of winding rope, wire rope bit rope major problems. Lebus groove system smooth of wire rope winding, uniform distribution of load between each layer, the technology greatly prolong the service life of wire rope, extend the service life of wire rope can be more than 500%, reduce the wire rope damage to improve the safety, and reduce the mechanical equipment in line outage problem.

3. The material of wire rope drum is usually no less than HT20-40 cast iron, ZG25,ZG35 or Q235B, Q345B welding steel plate is also able to be the material for special needs.

1. The surface of the single-layer winding drum is cut with a spiral groove with an arc-shaped section to increase the contact area between the wire rope and the drum body, and to fix the winding position of the wire rope on the drum to avoid the influence of adjacent wire ropes rubbing against each other.

2. The surface of the drum body of the multi-layer winding drum is usually a smooth surface without spiral grooves, and there are flanges at both ends of the drum body to prevent the wire rope from slipping out. The disadvantage is that the wire ropes are closely arranged, and the layers are stacked and rubbed against each other, which has a great impact on the life of the wire rope. Among the structural dimensions of the reel, the key dimension that affects the life of the wire rope is the calculated diameter of the reel.

3. In order to ensure the reliable fixation of the wire rope tail and reduce the stress on the pressure plate or wedge, when the pick-up device is lowered to the lower limit position, in addition to the fixed loop of the wire rope, 1.5 to 3 safety loops should be reserved on the reel. Known as the load-relief ring, this has been taken into account in the design of the reel. In use, the more loops of the wire rope tail are retained, the smaller the force on the pressure plate or wedge of the rope tail, and the safer it is. If the lower limit position of the pick-up device is too low and the remaining number of wire ropes on the drum is less than the designed number of safe loops, the force on the tail of the wire rope will exceed the pressing force of the pressure plate or wedge, resulting in the wire rope was pulled off and the heavy object fell.

Generally, we recommend grooved drums only. The rope is spooled properly and positively. Depending on the drum/rope diameter relationship helix-grooved drums can be used for up to 3 layers without excessive rope wear. For applications with more than 3 layers (e.g. Mobile cranes) we recommend ‘Lebus’ grooving.

It has to be remembered, however, that rope service life on multiple layer drum systems will always only be a fraction of that compared with single layer helix-grooved drums.

If these values are applied to single layer grooved drums the maximum permissible rope-deflection angle for regular wire rope constructions is 4°. For non rotating /rotation-resistant ropes the maximum permissible deflection angle is 1.5° only.

The majority of wire rope problems occurring during operation actually begin during installation, when the rope is at its greatest risk of being damaged. Proper installation procedures are vital in the protection and performance of wire rope products.

Until the rope is installed it should be stored on a rack, pallet or reel stand in a dry, well-ventilated storage shed or building. Tightly sealed and unheated structures should be avoided as condensation between rope strands may occur and cause corrosion problems. If site conditions demand outside storage, cover the rope with waterproof material and place the reel or coil on a support platform to keep it from coming directly in contact with the ground.

While lubrication is applied during the manufacturing process, the wire rope must still be protected by additional lubrication once it is installed. Lubricants will dry out over a period of time and corrosion from the elements will occur unless measures are taken to prevent this from happening. When the machine becomes idle for a period of time, apply a protective coating of lubricant to the wire rope. Moisture (dew, rain, and snow) trapped between strands and wires will create corrosion if the rope is unprotected. Also apply lubricant to each layer of wire rope on a drum because moisture trapped between layers will increase the likelihood of corrosion.

Always use the nominal diameter as specified by the equipment manufacturer. Using a smaller diameter rope will cause increased stresses on the rope and the probability of a critical failure is increased if the rated breaking strength does not match that of the specified diameter. Using a larger diameter rope leads to shorter service life as the rope is pinched in the sheave and drum grooves which were originally designed for a smaller diameter rope. Just as using a different diameter rope can create performance problems, so can the use of an excessively undersized or oversized rope.

Measure the wire rope using a parallel-jawed caliper as discussed in Measuring Rope Diameter at the top of this page. If the rope is the wrong size or outside the recommended tolerance, return the rope to the wire rope supplier. It is never recommended nor permitted by federal standards to operate cranes with the incorrect rope diameter. Doing so will affect the safety factor or reduce service life and damage the sheaves and drum. Note that in a grooved drum application, the pitch of the groove may be designed for the rope’s nominal diameter and not the actual diameter as permitted by federal standards.

Wire rope can be permanently damaged by improper unreeling or uncoiling practices. The majority of wire rope performance problems start here.Improper unreeling practices lead to premature rope replacement, hoisting problems and rope failure.

Place the payout reel as far away from the boom tip as is practical, moving away from the crane chassis. Never place the payout reel closer to the crane chassis than the boom point sheave. Doing so may introduce a reverse bend into the rope and cause spooling problems. Follow the guidelines highlighted under Unreeling and Uncoiling and Drum Winding. Take care to determine whether the wire rope will wind over or under the drum before proceeding. If the wire rope supplier secured the end of the rope to the reel by driving a nail through the strands, ask that in the future a U-bolt or other nondestructive tie-down method be used; nails used in this manner damage the rope.

Take extra precaution when installing lang lay, rotation-resistant, flattened strand or compacted ropes. Loss of twist must be avoided to prevent the strands from becoming loosened, causing looped wire problems.

The end of the rope must be securely and evenly attached to the drum anchorage point by the method recommended by the equipment manufacturer. Depending on the crane’s regulatory requirements, at least two to three wraps must remain on the drum as dead wraps when the rope is unwound during normal operations. Locate the dead end rope anchorage point on the drum in relation to the direction of the lay of the rope. Do not use an anchorage point that does not correspond with the rope lay. Mismatching rope lay and anchorage point will cause the wraps to spread apart from each other and allow the rope to cross over on the drum. Very gappy winding will occur resulting in crushing damage in multilayer applications.

Back tension must be continually applied to the payout reel and the crewman installing the rope must proceed at a slow and steady pace whether the drum is smooth or grooved.Regardless of the benefits of a grooved drum, tension must be applied to ensure proper spooling. An improperly installed rope on a grooved drum will wear just as quickly as an improperly installed rope on a smooth drum. If a wire rope is poorly wound and as a result jumps the grooves, it will be crushed and cut under operating load conditions where it crosses the grooves.

Every wrap on the first or foundation layer must be installed very tightly and be without gaps. Careless winding results in poor spooling and will eventually lead to short service life. The following layers of rope must lay in the grooves formed between adjacent turns of the preceding layer of rope. If any type of overwind or cross-winding occurs at this stage of installation and is not corrected immediately, poor spooling and crushing damage will occur.

On a multilayer spooling drum be sure that the last layer remains at least two rope diameters below the drum flange top. Do not use a longer length than is required because the excess wire rope will cause unnecessary crushing and may jump the flange. Loose wraps that occur at any time must be corrected immediately to prevent catastrophic rope failure.

The use of a mallet is acceptable to ensure tight wraps, however a steel-faced mallet should be covered with plastic or rubber to prevent damage to the rope wires and strands.

Rotation-resistant ropes of all constructions require extra care in handling to prevent rope damage during installation. The lay length of a rotation-resistant rope must not be disturbed during the various stages of installation. By introducing twist or torque into the rope, core slippage may occur—the outer strands become shorter in length, the core slips and protrudes from the rope. In this condition the outer strands become over- loaded because the core is no longer taking its designed share of the load. Conversely, when torque is removed from a rotation-resistant rope core slippage can also occur. The outer strands become longer and the inner layers or core become overloaded, reducing service life and causing rope failure.

The plain end of a wire rope must be properly secured. If the entire cross section of the rope is not firmly secured, core slippage may occur, causing the core to pull inside the rope’s end and allowing it to protrude elsewhere, either through the outer strands (popped core) or out the other end of the line. The outer layer of the outside strands may also become overloaded as there is no complete core-to-strand support.

Secure the ends of the rope with either seizing or welding methods as recommended under Seizing Wire Rope. It is imperative that the ends be held together tightly and uniformly throughout the entire installation procedure, including attaching the end through the wedge socket and the drum dead end wedge

When installing a new line, connect the old line to the new line by using a swivel-equipped cable snake or Chinese finger securely attached to the rope ends. The connection between the ropes during change-out must be very strong and prevent torque from the old rope being transferred into the new rope.Welding ropes together or using a cable snake without the benefit of a swivel increases the likelihood of introducing torque into the new rope. A swivel-equipped cable snake is not as easy as welding the ropes, but this procedure can be mastered with a little patience and practice.

Deep resource extraction is an effective method for today’s energy crisis, and it is also an important strategic goal of China [1,2]. Deep resource mining relies on the safe work of mine hoists. For mine hoists where rope hoisting is dominant, the failure of rope arrangement is an important factor affecting the safe and stable operation of hoists [2]. For ultra-deep mines, high speed and heavy load will be common conditions, which generally means that a thicker and longer wire rope is required. This can lead to the width of the rope winding area of the drum and the number of layers of wire rope on the drum increasing. Then, the possibility of rope winding errors is larger, and the risk is greater, making the rope fault detection a problem that must be solved for the ultra-deep mine hoist. However, currently, the detection of the status of the rope arrangement mostly relies on manual inspections or manual guards. The rope tension sensors and displacement transducer installed on the wire rope or drum can tell us some signs of the rope arrangement status, but it is not direct enough, easy to be disturbed, with low accuracy and is unable to find the rope arrangement fault in time. Therefore, a sensor or a detection method for accurate full-time automatic detection of the rope arrangement state is very necessary.

At present, machine vision is increasingly being used for the testing and calculation of specific targets in large-scale projects, and has achieved good results. Such as the calculation and measurement of large-scale structural parts [3], the calculation of the vibration mode of cable-stayed bridges [4,5], and the deformation monitoring [6,7] and geometric shape detection [8] of bridge structures. Using machine vision to detect the status of the wire rope is becoming an effective method.

In the use of machine vision to detect the position of the wire rope, Chen et al. [9] use a customer grade camcorder and an ordinary tripod to detect the frequency of steel wire ropes on a cable-stayed bridge, achieving the same order of accuracy for cable frequency identification as that of high-resolution velocimeters. Winkler et al. [10] use digital image correlation to obtain measurement of local deformations in steel mono strands. Yao et al. proposed a non-contact video-based measurement for transverse displacements of hoisting catenaries in mine hoist using mean shift tracking [11,12] and digital image processing techniques [13]. Wu et al. [14] proposed a non-contact and unmarked machine vision measurement method for measuring the transverse vibration displacement of hoisting vertical ropes. In the hoisting cape area, because the video of the rope detection is shot with the sky as the background, the target and the background are very distinguishable, so the recognition effect is obvious, and the background of the wire rope to be detected in the reel area is the same wire rope (such as Figure 1a) and the target and the background are very similar, thus the same recognition method will be much worse.

Flowchart of the rope arrangement detection method based on optical projection and machine vision. (a) Take a video of the rope arrangement projection, (b) the image of projection area in each frame is binarized, (c1) extracting edge curve of graph (b), (c2) smoothing the edge curve of graph (c1), (d) feature extraction, (e) clustering, assessment and obtain the results.

Table 1 shows the current existing detection methods for rope arrangement detection. Wu et al. [15] used the method of adaptive gray threshold segmentation on the same horizontal line to achieve the distinction between the target wire rope and the background, but this method is based on the difference in the reflective performance of the wire rope and the rope groove. For the oily wire rope, the tightly wound wire rope and multi-layer steel wire rope on the drum are not applicable. Xue et al. [16] proposed the method of using template matching and limiting the size of the target selection area making the target and the background better to distinguish, and realized the video tracking of the position of the wire rope. Other video tracking methods, like KCFs (kernelized correlation filters) [17] and Staple [18], can be used for rope arrangement detection. However, because the target selection area is limited, the algorithm is easy to lose the target when the rope winding speed is fast or the skipping span is large. At the same time, when shooting a wide reel, the image will inevitably be distorted (as shown in the Figure 1a). In addition, because the target is deformed greatly, part of the texture information is lost and cannot be retrieved through distortion correction, thus the video tracking of the position of the wire rope is very difficult. To sum up, the difficulties of rope detection in ultra-deep mine hoist based on machine vision are summarized as follows:The target is extremely similar to the background;

Therefore, this study aims at detecting and diagnosing the problems of rope arranging faults in ultra-deep mines with wide drums and high speeds, and proposes a new method for arranging rope detection based on machine vision and optical projection. In this study, edge projection image is used to detect the state of rope arrangement to make the rope separated from its complicated and similar background. Using approximate parallel light irradiation and quantitative calculating, the installation position of the point light source required by the drum, with different widths to solve the problem of distortion of the wide reel, is found. For higher detection speed and more accurate detection results, unlike other video tracking methods that require a comparison of several frames, we get the rope arrangement at that moment with just the current single frame and consider the detection results of current frames to judge the rope arrangement fault. In both the laboratory and the simulation test bed, the purpose of error-free identification of the rope fault is achieved, and the processing speed exceeds 150 fps (for narrow reels, it can reach 300 fps or more).

The flow of the novel method is shown in Figure 1. First, illuminate the edge of the reel rope with parallel light, place a pure white background board at its projection position, then use an industrial camera to shoot the projection of the rope on the background board, process the projected image, and extract the characteristic value corresponding to each wire rope. Finally, the unsupervised clustering method is used to classify and get the rope status detection result.

The arrangement of this paper is as follows: At present, there are few introductions of the reel-rope projection model, which has a greater impact on the setting of the relevant parameters of this study. Therefore, this article will describe (in Section 2) how to choose the drum-rope projection model and the installation position of the point light source, (in Section 3) how to quickly obtain the boundary curve from the binarized image and then extract the feature value to ensure that each feature value corresponds to a wire rope or a rope groove; and (in Section 4) how to use the unsupervised clustering method for such features’ values for effective and robust classification. And in Section 5, the application effects in the model machine and the real mine are described.

dist()A function to calculate the distancerThe radius of the section circle of torus or the radius of the ropeHlightThe installation height of the point light source

Referring to Fig. 1-Fig. 6; A kind of multiple wraps spiral drum slot reel; Comprise reel 1, spiral drum slot 2, steel rope 13, reel side plate 14; Said reel 1 two ends are mounting interface 6; Open rope through 7 at reel side plate 14 upper edge steel ropes 13 winding directions; Described spiral drum slot 2 extreme ends are provided with rope climbing piece 3; Steel rope 13 initiating terminals are provided with wedge 4; The cornerite

time rope climbing piece 3 the height value be designed to 2 millimeters, the welding of fillet weld during convenient dress weldering; The width of rope climbing piece 3 equaled steel rope 13 from 0 o"clock diameter diminish gradually promptly be smoothly transitted into 270

time equal 1/9 of steel rope 13 diameters.Wedge 4 roles are to be absorbed in the space between ground floor steel rope 13 and the reel side plate 14 when avoiding second layer steel rope 13 to be wound into here, thereby this space is filled.

Described spiral drum slot 2 directly shapes through lathe turning on reel 1.After being shaped through numerical control machining with wedge 4, rope climbing piece 3 is welded on the reel 1 by the external diameter bending of reel 1 again.Described rope through 7 and reel side plate 14 plane included angles be 10

, the diameter of rope through 7 is 1.2～1.25 times of steel rope 13 diameters.Said reel side plate 14 arranged outside that have rope through 7 have cord-pressing block 5, and cord-pressing block 5 is fixed on the side side plate 14 through binding bolt 8; Said cord-pressing block 5 is provided with the pressure grooving 15 that section is an equicrural triangle, and the angle of two trough rims is 90 ° on the said pressure grooving 15, and the angle of two trough rims seamlessly transits.Press the angle of two trough rims on the grooving 15 to be designed to 90 °; Can be under the situation of certain binding bolt 8 predetermincd tensions; The pressure that makes cord-pressing block 5 act on the steel rope 13 is bigger; Friction force between steel rope 13 and reel 1 and the cord-pressing block 5 is also just bigger, and steel rope 13 also just is not easy to be pulled more.Binding bolt 8 can select a little bit smaller bolt, reserves more space for reel side plate 14.Described mounting interface 6 is provided with the flange plate structure of small sircle hole for the outer ring, and the mounting interface 6 at reel 1 two ends is designed to symmetrical structure.

Referring to Fig. 1, in practical application, reductor 10 is a Purchased Item, and mounting interface 6 confirms according to the interface size of reductor 10 in advance, mounting flange 9 according to the interface size of reductor 10 from processing and fabricating; The mounting interface 6 at reel 1 two ends is designed to symmetrical structure, when needs change rope outlet direction, can transfer a direction to install on reel 1 easily, to satisfy the demand of different rope outlet directions.After reel 1 machines; Reel 1 all is fixedly mounted on the winch support 12 after installing with mounting flange 9 and reductor 10; HM Hydraulic Motor 11 is installed in reductor 10 1 sides; By 10 motions of HM Hydraulic Motor 11 drive speed reducer, reductor 10 is with reel 1 rotation, thus the winding of realization steel rope 13.Reel 1 can twine compound steel silk rope 13 without special processing, during test, twine compound steel silk rope 13 after, the phenomenon of disorder cable does not appear in steel rope 13 marshallings, shows that this multiple wraps spiral drum slot reel is to confirm with feasible.

Above content is to combine concrete preferred implementation to the further explain that the present invention did, and can not assert that practical implementation of the present invention is confined to these explanations.For the those of ordinary skill of technical field under the present invention, under the prerequisite that does not break away from the present invention"s design, can also make some simple deduction or replace, said structure all should be regarded as belonging to protection scope of the present invention.

The crane drum is one of the most crucial components in the crane equipment , with unique functions to wind steel ropes of the hosting or towing mechanism whereby converting the rotary motion of the driving unit into the linear motion of the rope .

Rope drum is usually made of cast iron. However, on special occasions or based on your special requirements, crane rope drum can directly weld with cast steel or steel plate. Customized rope drum is available from DQCRANES.

The rope drums of DQCRANES can be used on all types of industrial cranes. We provide a wide ranges of rope drums with different sizes and designs, which can meet your cranes of any capacities. DQCRANES’ rope drum is robust, durable and reliable.