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In the troubleshooting of double row sprocket faults, the common problems and solutions are as follows:

1. Chain tooth skipping

– Reason: The chain is too loose, causing the sag to be too large; The chain or sprocket is severely worn; Severely overloaded.

Solution: Tighten the chain appropriately, replace the worn chain or sprocket, and select high-strength chains to eliminate the cause of overload.

2. The chain cannot be separated from the sprocket

– Reason: The sprocket is not aligned properly; The sprocket is severely worn.

Solution: Realign the sprocket and replace the worn sprocket.

3. The chain plate broke

– Reason: The load is greater than the dynamic load capacity of the chain.

Solution: Select large-pitch chains or reduce the dynamic load.

4. The teeth of the chain plate or sprocket are severely side worn

– Cause: The sprockets are not coplanar or the end faces of the sprockets have severe runout; The stiffness of the sprocket support is poor. The chain is severely distorted.

Solution: Enhance processing and installation accuracy, increase the rigidity of supporting components, and replace the chain with a suitable one.

5. The outer side of the external link is scratched

– Reason: The chain was not taut and jumped, thus colliding with adjacent objects. The chain box is deformed or contains foreign objects.

Solution: Tighten the chain appropriately, eliminate the deformation of the chain box, and remove any debris.

6. Wear of the pin shaft or adhesion between the pin shaft and the sleeve

– Reason: Poor lubrication; The chain speed is too high or the load is too large.

Solution: Provide an appropriate lubrication system to reduce speed or load.

7. The teeth of the sprocket are severely worn

– Reason: Poor lubrication; The material of the sprocket is poor and the hardness of the tooth surface is insufficient.

Solution: Improve the lubrication conditions.

8. Chain locking components such as retaining rings and cotter pins are loose

– Reason: The chain shakes too violently; There are obstacles bumping into it. The locking element is improperly installed.

Solution: Appropriate tension or consider adding guide plates and support plates to eliminate obstacles and improve the installation quality of the locking elements.

9. The chain fails to mesh with the sprocket correctly

– Reason: The size of the chain and the sprocket does not match; Overload Chain wear or sprocket tooth wear; Insufficient winding Angle; Insufficient backlash The distance between the center of the chain and the sprocket is inappropriate.

Solution: Replace the chain or sprocket with a suitable one, reduce the load, increase the number of chain teeth or enlarge the size, adjust the winding Angle to over 120° or more than 3 teeth, set up and adjust the Carterier and removal device, and check and correct the center distance.

10. The system makes abnormal noises

– Cause: Improper installation of the sprocket or shaft; Poor lubrication of the chain The tension of the chain is too high or too low; The chain or sprocket is severely worn; Improper lubrication The chain or moving parts interfere with the shell. The guide rail is improperly set.

Solution: Inspect and correct the installation, tighten all bolts and nuts, adjust the shaft spacing to the optimal tension, replace a complete set of chains and sprockets, apply appropriate lubrication according to the usage conditions, inspect and correct the interference, and inspect and correct the guide rail Settings.

11. Chain shaking

– Reason: The chain tension is too high or too low; Chain wear or sprocket wear; The dimensions of the chain and the sprocket do not match. Improper lubrication or harsh environment.

Solution: Adjust the chain length or shaft spacing, replace with new products, replace the chain and take appropriate lubrication and protection measures.

12. The sprocket is deformed

– Cause: Overloading or excessive impact force causes the sprocket to deform.

– Manifestation: The sprocket fails to mesh normally with the chain, and the transmission is unstable.

Solution: Turn off the power of the equipment, use a dial indicator to measure the degree of deformation of the sprocket, and replace it with a new sprocket after confirming that the deformation is severe.

13. Sprocket corrosion

– Reason: Damp environment or erosion by chemical substances.

– Manifestation: Rust or corrosion spots appear on the surface of the sprocket, affecting its service life.

Solution: Regular lubrication, selection of corrosion-resistant materials, and avoidance of damp environments.

14. The tension of the chain is inappropriate

The reason is that the tension of the chain is related to the sag distance of the loose edge. It should be kept appropriately taut to avoid being too loose or too tight.

Solution: Install a tensioning device or adjust the center distance to ensure that the drooping distance of the loose side of the chain is approximately 2% of the center distance.

15. The sprocket and the chain do not fit well

– Cause: Chain hinge wear, pitch elongation and tooth skipping phenomenon.

Solution: Check the wear of the chain hinge and replace the chain and sprocket in time.

16. The noise from the chain operation is too loud

– Reasons: The meshing impact between the sprocket tooth surface and the chain, the operating noise of the bearing, and the resonance of the entire transmission system.

Solution: Enhance the manufacturing accuracy of sprockets and chains, optimize the tension of chains, select appropriate lubricants and lubrication methods, and reduce the noise generated by friction. When selecting bearings, give priority to low-noise bearing products and ensure their correct installation and appropriate preload. For transmission systems that are prone to resonance, the resonant frequency can be avoided by changing the number of teeth or diameter of the sprocket or adjusting the structural parameters of the transmission system, thereby effectively reducing the noise level.

17. Side grinding of chain plates

– Cause: Poor alignment of the shaft and sprocket, and insufficient rigidity due to excessive load.

Solution: Check the alignment of the shaft and sprocket, and verify if the load is too large, resulting in insufficient rigidity.

18. Chain plate fatigue

– Cause: Frequent starts and stops, overloading operation.

Solution: Reduce the load or replace the chain with one that has a greater load-bearing capacity.

19. Pin shaft wear

– Reason: Poor lubrication.

Solution: Check the quality of the lubricating oil to ensure adequate lubrication.

20. Pin shaft bonding

– Cause: Improper installation of the shaft and sprocket results in parallel shafts and coplanar sprockets.

Solution: Check the installation of the shaft and sprocket to ensure that the shafts are parallel and the sprockets are coplanar.

21. The sprocket teeth are worn

– Reason: Poor alignment of the transmission. Adjust the installation direction of the sprocket.

Solution: Check the alignment of the transmission, adjust the installation direction of the sprocket, and replace the sprocket and chain if necessary.

22. The chain is loose

– Reason: Insufficient or overly tight chain tension.

Solution: Adjust the tension of the chain to ensure good meshing between the chain and the sprocket.

23. The chain broke

– Reason: Severe overloading, with the load exceeding the chain's carrying capacity.

Solution: Eliminate the cause of overload or reselect a chain with a larger specification and stronger load-bearing capacity.

24. The chain comes loose

– Reason: The tension on both sides is unbalanced; The guide rail clearance is too large; The pitch of the chain increases; The scraper is deformed. The drive sprocket is severely worn. Foreign object jamming.

Solution: Regularly inspect and adjust the tensioning device, check the wear of the chain and sprocket, remove foreign objects after maintenance, and check and adjust the guide rail clearance.

25. The chain was damaged prematurely

– Reasons: Insufficient lubrication, inappropriate chain tension, and asymmetrical sprockets.

Solution: Lubricate as required, readjust the chain length, and adjust the sprocket.

26. The drive chain falls off

– Reason: The sprockets in the same transmission circuit are not coplanar, and the tensioning wheel is too loose.

Solution: Adjust the two sprockets to be coplanar and moderately adjust the tensioning wheel.

27. The chain and sprocket do not fit well

– Reason: Chain wear, pitch elongation.

Solution: Replace the chain and sprocket.

28. Insufficient chain tension

– Reason: The tension of the chain is related to the distance that the loose edges sag.

Solution: Adjust the chain tension to ensure that the drooping distance of the loose side of the chain is about 2% of the center distance.

29. The noise from the chain operation is too loud

– Reason: The sprocket chain is not coplanar; The chain is too tight or too small; The chain is not smooth enough. Chain and sprocket wear; The pitch of the chain is too large.

Solution: Check the coplanarity between the front and rear shafts and the sprocket, adjust the center distance and tensioning device to achieve the appropriate tightness and ensure the smoothness of the workpiece.

30. The chain has loose edges and droops

– Reason: Insufficient chain tension.

Solution: Install the tensioning device or the adjustable center distance of the device.

http://www.qj-chain.com
Hangzhou Qianjiang Chain Industries Co., Ltd.

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