Steel Roller Chain

The steel roller chain can be divided into short pitch precision roller chain, short pitch precision roller chain, bending plate roller chain for heavy load transmission, cement machinery chain, plate chain and high-strength chain.

Chains are divided into four types according to different purposes and functions: drive chain, conveyor chain, traction chain and special chain.

1. Transmission chain: mainly used to transmit power.

2. Conveying chain: mainly used for conveying materials.

3. Traction chain: mainly used for pulling and hoisting.

4. Special chain: It is mainly used for chains with special functions and structures on special mechanical devices.

Dynamic load of chain drive 

The main reasons for the dynamic load of chain drive during operation are: 

(1) The steel roller chain speed and the angular speed of the driven sprocket change periodically, resulting in additional dynamic load. The greater the acceleration of the chain, the greater the dynamic load will be. 

(2) The partial speed of the chain along the vertical direction also changes periodically, causing the chain to produce transverse vibration, which is also one of the reasons for the dynamic load of the chain drive. 

(3) When the steel roller chain link enters the sprocket, the chain link engages with the sprocket teeth at a certain relative speed, and the sprocket and teeth will be impacted and produce additional dynamic load. As shown in Figure 6.11, according to the principle of relative motion, if the sprocket is regarded as stationary, the chain link will enter the gear teeth at an angular speed -w to produce impact. This phenomenon intensifies with the increase of sprocket speed and chain pitch. Make the transmission produce vibration and noise. 

(4) If the chain tension is not good and the chain is loose, inertia impact will occur under the conditions of starting, braking, reversing and load change, resulting in great dynamic load of chain transmission.

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