What are the common failures of roller chains in the metallurgical industry?
In the metallurgical industry, Roller chains are a common transmission component, and their stability and reliability are crucial to the entire production process. However, roller chains may have various failures during long-term operation, affecting the normal operation of the equipment. The following are some common failures of roller chains in the metallurgical industry and their causes and countermeasures:
1. Chain plate fatigue failure
The chain plate may suffer fatigue failure after a certain number of cycles under the repeated action of loose side tension and tight side tension. This is caused by the fact that the fatigue strength of the chain plate is not enough to cope with long-term cyclic stress. To solve this problem, the fatigue life of the chain can be improved by using heavy series chains, increasing the overall chain size, or reducing the dynamic load on the chain.
2. Impact fatigue failure of roller sleeves
The meshing impact of the chain drive is first borne by the rollers and sleeves. Under repeated impacts, the rollers and sleeves may suffer impact fatigue failure. This form of failure often occurs in medium and high-speed closed chain drives. In order to reduce this kind of failure, the chain should be reselected, the impact force should be reduced by using a buffer device, and the starting method should be improved.
3. Bonding of the pin and the sleeve
When the lubrication is improper or the speed is too high, the working surface of the pin and the sleeve may bond. Bonding limits the maximum speed of the chain drive. Removing impurities in the lubricating oil, improving the lubrication conditions, and replacing the lubricating oil are effective measures to solve this problem.
4. Chain hinge wear
After the hinge is worn, the chain link becomes longer, which is easy to cause tooth skipping or chain derailment. Open transmission, harsh environmental conditions or poor lubrication and sealing can easily cause hinge wear, thereby sharply reducing the service life of the chain. Improving lubrication conditions and increasing the sprocket material and tooth surface hardness are effective ways to extend the service life of the chain.
5. Overload breakage
This breakage often occurs in low-speed heavy load or severe overload transmission. When the chain drive is overloaded, it is broken due to insufficient static strength. Reducing the load and using a chain with a large load force are measures to prevent overload breakage
6. Chain shaking
Chain shaking may be caused by chain wear and elongation, heavy impact or pulsating load, severe wear of sprocket teeth, etc. Replacing the chain or sprocket, properly tightening, and taking measures to make the load more stable are effective ways to solve chain shaking
7. Severe wear of sprocket teeth
Poor lubrication, poor sprocket material, and insufficient tooth surface hardness are the main reasons for severe wear of sprocket teeth. Improving lubrication conditions, increasing sprocket material and tooth surface hardness, removing the sprocket and turning it 180° and then installing it can extend the service life of the sprocket
8. Loosening of chain locking components such as circlips and cotter pins
Excessive chain shaking, collision with obstacles, and improper installation of locking components are the reasons for the loosening of chain locking components such as circlips and cotter pins. Appropriate tensioning or considering adding guide plate support plates, removing obstacles, and improving the installation quality of locking parts are measures to solve this problem
9. Severe vibration and excessive noise
Sprockets are not coplanar, loose edge sag is not appropriate, poor lubrication, loose chain box or support, and severe wear of chain or sprocket are the causes of severe vibration and excessive noise. Improving the installation quality of sprockets, proper tensioning, improving lubrication conditions, eliminating loose chain box or support, replacing chains or sprockets, and adding tensioning devices or anti-vibration guides are effective ways to reduce vibration and noise
Through the analysis of the above fault types, we can see that there are many types of roller chain failures in the metallurgical industry, involving wear of the chain itself, lubrication problems, improper installation and other aspects. Through regular inspection, maintenance and proper operation, the occurrence of these failures can be effectively reduced to ensure the normal operation and production efficiency of metallurgical equipment.
Post time: Dec-13-2024