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Faults and troubleshooting methods in the use of chain drives
Nov 13, 2018

The following ten are frequently encountered in the chain drive process:


1. The parallelism of the front and rear axles and the coplanarity of the sprocket: For wear life, the performance of the chain depends to a large extent on whether the front and rear axles and the sprocket are installed correctly. The requirement is that the parallelism of the front and rear axles is Within 1/300. The coplanarity of the front and rear wheels is 0.5-1.0 mm / m. If the chain finds the above problems during operation, it should be adjusted in time.

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2. Chain tension: The tension of the chain is related to the drooping distance of the chain. For horizontal and tilting transmissions with adjustable center-to-center distance, the sag of the chain's loose side should be 2% of the centerline. The centerline is vertically driven or subjected to shock loads, and the reverse drive should make the chain more tensioned.


3. Chain and sprocket cooperation: If the chain and the sprocket do not cooperate well, the chain hinge may wear and the pitch is elongated. If there is a tooth skipping phenomenon, the chain should be replaced in time if the sprocket wears out, so as not to damage the new chain.


4. Chain Jitter: The reason for chain jitter is that the chain is too loose, the load is too large or there is one or more links that are not flexible. The solution is to install the chain tensioner or adjust the center distance to reduce the load if possible.


5. Chain running noise is too large: the cause of excessive noise is that the sprocket is not coplanar; the chain is too tight or too small; the lubrication is insufficient; the chain and sprocket are worn out; or the chain pitch size is too large. The solution is: Check the front and rear axis parallel and sprocket coplanarity to correct the center distance and tensioning device to obtain proper tightness and ensure lubrication to the workpiece.


6. Chain plate side grinding: If the inner surface of the inner chain link plate is seriously worn, it means that the transmission is not aligned. The solution is to check the alignment of the shaft and the sprocket. If there is no problem in the installation, check whether the load is due to the load during the operation. Excessive deformation causes insufficient rigidity.


7. Chain plate fatigue: When the load is too large to exceed the fatigue limit of the chain plate, the chain plate will fatigue damage, and micro cracks will be generated around the hole until the solution to the fracture is to reduce the load or replace the chain with large carrying capacity.


8. Pin wear: Usually the pin wear is caused by insufficient lubrication, and it is necessary to check whether there is abrasive or change the lubrication in the lubricating oil.


9. Pin gluing: pin gluing is generally caused by insufficient oil supply. If only one end is glued, then check the shaft and sprocket installation, whether the shaft is parallel, whether the sprocket is coplanar, and the shaft and chain during operation. Whether the wheel is moving.


10. Sprocket tooth wear: If the sprocket teeth have obvious wear on both sides, the transmission alignment is not good. If the "curved groove" indicates excessive wear, the sprocket should be changed, or the sprocket can be reversed to make the wearer face lighter. Chain. The excessively worn sprocket is preferably replaced with the chain.