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What to pay attention to when choosing a chain Sep 12, 2020

What to pay attention to when choosing a chain

 

  The tightness of the chain should be suitable. Too tight increases power consumption and bearings are easy to wear; too loose chain is easy to jump and fall off. The tightness level of the chain is as follows: lifted or pressed down from the middle of the chain, the center distance between the two sprockets is about 2%-3%. The new chain is too long or stretched after use, and it is difficult to adjust, depending on the condition, remove it to the chain link , But it must be an even number. The chain link should pass through the reverse side of the chain, the lock piece should be inserted outside, and the opening teeth of the lock piece should face the opposite direction of rotation.

   After the sprocket is severely worn, the new sprocket and the new chain should be replaced at the same time to ensure good meshing. It is not possible to just change to a new chain or new sprocket alone. Otherwise it will cause poor meshing and accelerate the wear of the new chain or new sprocket. When the tooth surface of the sprocket wears to a certain level, it should be turned over and used in time (referring to the sprocket with adjustable surface). To extend the use time.

   The old chain cannot be mixed with the local new chain, otherwise there will be an impact in the transmission and the chain will be broken. The chain should be filled with lubricating oil in time during work. The smooth oil needs to enter the matching gap between the roller and the inner sleeve to improve working conditions and reduce wear. When the machine is stored for a long time, the chain should be removed and cleaned with kerosene or diesel, and then coated with oil or butter and stored in a boring environment.

Compared with belt transmission, chain transmission has no elastic sliding and slippage, and can adhere to a precise and uniform transmission ratio. The required tension is small and the pressure acting on the shaft is also small. It can reduce the friction loss of the bearing. It can be used at higher temperatures and Work under harsh environmental conditions such as oil pollution; Compared with gear transmission, the manufacturing and device accuracy requirements of chain transmission are lower, and the transmission structure is simple when the center distance is large. Because of the above advantages, chain drives are commonly used in various mechanical equipment.


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