As an important mechanical transmission device, roller chains are widely used in industrial equipment, agricultural machinery, automobile transmission, and other fields. However, in actual use, roller chains may have abnormal noise problems, which not only affect the smoothness of equipment operation but also may shorten the service life of roller chains. This article will analyze in detail the reasons why roller chains produce abnormal noise, and provide corresponding solutions to help users better maintain and use roller chains.
1. Common causes of abnormal noise in roller chains
Insufficient or overtightened chain tension
If the chain tension is insufficient, the chain may relax during operation, resulting in unstable meshing between the chain and the sprocket, resulting in a knock or shaking sound.
An overtightened chain will increase the friction between the chain and the sprocket, increase the running resistance, and make a harsh friction sound.
Insufficient or improper lubrication
Roller chains require proper lubrication to reduce friction and wear. If the amount of lubricating oil is insufficient or the quality of the lubricating oil is poor, the chain will produce dry friction during operation and emit sharp friction noise.
Improper lubrication may also cause uneven lubrication in certain parts of the chain, causing local noise.
Poor engagement between chain and sprocket
The engagement accuracy between chain and sprocket directly affects the transmission effect. If the chain pitch does not match the sprocket pitch, or the sprocket tooth tip is worn, it will cause poor engagement and abnormal noise.
The chain and sprocket axis are not parallel, which will also cause the chain to deviate and make abnormal noises during operation.
Chain wear or aging
With the extension of use time, the chain rollers, pins, and inner and outer chain plates will gradually wear due to long-term friction. The worn chain may loosen or deform during operation, causing noise.
The aging chain has reduced elasticity and is also prone to abnormal sounds.
Chain installation problem
If the chain is not installed correctly, such as not installing it in the prescribed order or method, it may cause uneven force during chain operation and make irregular noise.
Incorrect installation may also cause chain tooth skipping, further exacerbating the noise problem.
External environmental influence
When roller chains are exposed to harsh environments (such as dusty, high humidity, or corrosive gas environments), impurities will accumulate on the chain surface, resulting in increased friction and additional noise when the chain is running.
Temperature changes may also cause thermal expansion and contraction of the chain material, thereby changing the tension of the chain and inducing noise.
2. Solutions to abnormal noise in roller chains
Adjust chain tension
Check the tension of the chain regularly to ensure that it is appropriately tight. The chain should have an appropriate amount of sag, generally within the range of 1%-3% of the center distance.
Use a tensioning device or adjust the sprocket position to ensure that the chain maintains appropriate tension.
Properly lubricate the chain
Select lubricating oil or grease suitable for roller chains and add lubricants regularly according to the recommended lubrication cycle.
Use an oiler or automatic lubrication system to ensure that the lubrication covers all parts of the chain evenly.
For high-temperature or corrosive environments, special lubricants that are resistant to high temperatures or corrosion should be selected.
Replace worn parts
Check the wear of the chain and sprocket regularly. Once the chain pitch is found to be too large, the roller is loose, or the sprocket tooth tip is severely worn, it should be replaced in time.
Avoid mixing old and new chains or sprockets to avoid aggravating wear and meshing problems.
Ensure correct installation
When installing the chain, follow the correct operating steps to ensure that the meshing position of the chain and the sprocket is accurate.
Perform a running test after installation to confirm that the chain is evenly stressed and there is no tooth skipping.
Clean the chain
Clean the chain surface regularly to remove attached dust, dirt, or rust.
Reapply lubricating oil after cleaning to prevent the exposed surface of the chain from being corroded by air or moisture.
3. Measures to prevent abnormal noise from roller chains
Choose high-quality roller chains and sprockets
High-quality roller chains have better materials and manufacturing accuracy, which can significantly reduce operating noise.
Choose sprockets that match the equipment to ensure meshing accuracy.
Follow correct operating procedures
Before starting the equipment, ensure that the chain is in normal condition to avoid overload operation.
Check and maintain the chain after shutdown to extend its service life.
Reasonable design and selection
During the design stage, select the appropriate roller chain model and size to ensure that it can meet the actual load and operating conditions.
For occasions with high noise requirements, consider using low-noise chains or chains with buffer devices.
There are many reasons why roller chains produce abnormal noise, involving chain tension, lubrication status, wear degree, installation accuracy, and external environment. Through reasonable maintenance and care measures, such as adjusting tension, proper lubrication, replacing worn parts, and cleaning chains, the noise problem of roller chains can be effectively reduced, and the reliability and life of equipment operation can be improved. In actual use, users should formulate scientific maintenance plans based on the working environment and use conditions of roller chains, and take corrective measures in time to ensure the efficient operation and safety of roller chains.
As a professional roller chain distributor, we not only provide high-quality and durable roller chains, but also provide customers with a full range of technical support, including chain selection guidance, installation training, and maintenance recommendations. Help customers optimize equipment operation efficiency, reduce maintenance costs, and ensure the stability and efficiency of production lines.
www.qj-chain.com
Hangzhou Qianjiang Chain Industries Co., Ltd.
