(1) The chain speed and the angular velocity of the driven sprocket change periodically, thus generating additional dynamic loads. The greater the acceleration of the chain, the greater the dynamic load will be. As can be seen, the higher the rotational speed of the sprocket, the larger the pitch of the chain and the smaller the number of teeth of the sprocket, the dynamic load will increase. (2) The velocity of the chain along the vertical direction also changes periodically, which makes the chain vibrate transversely, and this is also one of the reasons for the dynamic load of chain transmission. (3) When the chain link enters the sprocket, the chain link and the sprocket...

The main failure forms of chain transmission are as follows: (1) Fatigue damage of chain plate Chain will be fatigued after a certain number of cycles under the repeated action of loose side tension and tight side tension. Under normal lubrication conditions, fatigue strength is the main factor that limits the load carrying capacity of chain transmission. (2) Impact fatigue damage of roller sleeve The impact of chain transmission is firstly borne by roller and sleeve. Under repeated impacts, after a certain number of cycles, the roller and sleeve...

1. Failure of chain transmission 1) Fatigue damage of chain When the chain is working, the chain on both sides of the sprocket is tensioned and slackened at the same time. The chain is constantly moving from the loose side to the tight side, so its components are working under variable stress. After a certain number of cycles, the chain plate will be fatigued and broken, or the surface of sleeve and roller will be fatigued and pitted (impact fatigue caused by polygon effect). Therefore, the fatigue strength of chain becomes the main factor in determining the load bearing of chain drive...

Failure: One of the main functions of the scraper conveyor in the synthesized mining face is to transport the lumps of coal cut by the coal mining machine, and this function is realized by the chain installed on the scraper conveyor. The chain itself is an elastomer, and the uncertainty of the amount of coal cut by the coal mining machine leads to inconsistency in the weight of the coal blocks carried by the scraper conveyor chain. After a long time of operation, the chain of the scraper conveyor will slacken, if not dealt with in time, it will lead to safety accidents such as broken chain, stuck chain, stacked chain, etc., and in serious cases, it will affect the...

First, the number of teeth of the sprocket Z is calculated according to the transmission ratio ι: ι = n1/n2 = Z2/Z1 where: n1: small sprocket rotational speed n2: large sprocket rotational speed Z1: small sprocket teeth Z2: large sprocket teeth. Second, the sprocket's indexing diameter of the circle D D = P / [sin (180 degrees / Z)], sprocket is not more than gears, as long as you give the "number of teeth, the row and the type of chain" can be. The number of teeth, the number of rows and the type of chain can be given. Because the tooth type of the sprocket and some other important dimensions and so on...

The main failure forms of chain wheel and chain transmission are as follows: (1) Fatigue damage of chain plate Chain in the repeated action of loose side tension and tight side tension, after a certain number of cycles, the chain plate will be fatigue damage. Under normal lubrication conditions, fatigue strength is the main factor that limits the bearing capacity of chain transmission. (2) Impact fatigue damage of roller sleeve The impact of chain transmission is firstly borne by roller and sleeve. Under repeated impacts, after a certain number of cycles, the roller...