Common faults and maintenance methods of gantry crane

[BONOVO]

Gantry crane refers to a full-turn boom crane with a gantry base. Gantry crane is a deformation of bridge crane, mainly used for loading and unloading operations in outdoor freight yards. The metal structure of the Gantry crane is like a gantry frame, carrying two supports under the main beam, which can be directly walked on the ground track, and the main beam can have overhanging cantilever beams at both ends.

Gantry crane has been widely used in railway freight yard because of its high site utilization rate, wide operating range, wide application and strong versatility, and plays an important role in ensuring the normal operation of railway transportation. The Gantry crane has a large amount of exercise, needs to be moved frequently in actual work, and the working environment is complex and changeable, so its safety is concerned. In the process of use often encounter some faults, if the fault is not handled in time, it may delay the work and bring security risks. Therefore, Shandong Jintong Lifting Equipment Co., Ltd. reminds you that in order to ensure the safe use of Gantry crane and play a good role, attention should be paid to the common failures of Gantry crane.

Gantry crane common faults are:

1, wire rope fault

Steel wire rope is an important mechanical part of the crane, the operation, the force of the steel wire rope is more complex, will produce extrusion stress, bending stress, tensile stress, etc., in the pulley, reel, will also be subjected to extrusion stress, bending stress, so it is difficult to calculate the force of the steel wire rope. When passing through the drum and pulley, the wire rope will be repeatedly bent, and after the number of winding increases, the wire rope is prone to wear. In addition, the wire rope fault is also related to the maintenance situation, work intensity, and whether the diameter of the drum is appropriate. The maintenance methods for the above faults are as follows: add lubricating oil on the surface of the wire rope, stop using the wire rope that is knotted and broken; Replace the rope with a new one.

2, reducer gear failure

The reducer is an important transmission construction in the crane. When working, the reduction gear can adjust the running motor to the right speed and produce greater torque. However, in the process of transmitting torque, gear is prone to failure, such as gear deformation, break, gear surface fatigue pitting and so on. The possible causes of these failures are: the gear fatigue crack, the load between years is too large, resulting in the gear break; When the load is large, the friction force of the transmission gear is too large, resulting in plastic deformation of the teeth. There is more dust on the tooth surface, and the effect of cleaning agent is not good. The maintenance methods for the above faults mainly include: repair or replace the gear; Adjust the transmission installation clearance; Replacement of bearings, replacement and replacement of lubricants; Replace the seal ring.

3, wheel, track failure

Crane gnawing rail is a common fault. Rail gnawing will reduce the crane service life, serious may lead to safety accidents. The reasons for crane gnawing rail may be: the installation quality of the trolley rail is not up to standard, the balance is not up to standard; The altitude difference between the two tracks is too large; The driving wheel and driven wheel are not synchronized, which will lead to the occurrence of rail gnawing failure. The maintenance methods for the above faults are as follows: replace or tighten the bolt of the pressure plate and weld the pressure plate again; Adjust the gauge and joint clearance to the specified value; Replace the track.

Therefore, regarding the use of Gantry crane, it is necessary to analyze the cause of the fault in actual work and take appropriate maintenance methods.

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