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Crane chain
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The crane chain can adjust the length of the chain according to the lifting height of the crane. It is an indispensable and important fetching device of the crane. It plays an important role in improving the efficiency of the crane and enlarging the operation scope of the crane. So how on earth should the crane chain be maintained and maintained?
1. Crane chain tightness should be appropriate, too tight to increase power consumption, bearing wear too loose chain easy to jump and release. The degree of tightness of the chain is: lifting or pressing from the middle of the chain, the center distance of the two sprockets is about 2% - 3%.
2. The new crane chain is too long or elongated after use, which is difficult to adjust. It can be disassembled according to the situation, but it must be even. The chains should pass through the back of the chain, the locking plates are inserted outside, and the opening of the locking plates should be in the opposite direction of rotation.
3. After serious wear and tear of sprockets, new sprockets and new chains should be replaced at the same time to ensure good meshing. New chains or sprockets should not be replaced alone. Otherwise, it will cause bad meshing to accelerate the wear of new chains or sprockets. When the sprocket tooth surface is worn to a certain extent, it should be turned over in time (refers to sprocket with adjustable surface). To extend the use time.
4. Sprockets should be installed on axles without skewing or swinging. In the same transmission assembly, the end faces of two sprockets should be located in the same plane. When the center distance of sprockets is less than 0.5 meters, the tolerance of 1 mm sprockets is more than 0.5 meters, and the tolerance of 2 mm. But there is no side phenomenon of friction sprocket teeth. If the two wheels move too much, it will easily lead to chain-breaking and accelerated wear. When replacing sprockets, attention must be paid to checking and adjusting the offset.
5. Old crane chains can not be mixed with some new chains. Otherwise, it is easy to produce impact and break chains in transmission.
6. The lifting chain should be filled with lubricant in time. The lubricant must enter the clearance between the roller and the inner sleeve in order to improve working conditions and reduce wear.
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