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What should be paid attention to when installing the lifting chain?

Sep,07,2022

The lifting chain is an indispensable and important picking device for the crane. The length of the chain can be adjusted according to the lifting height of the lifting object, which plays an important role in improving the working efficiency of the crane and expanding the working range of the crane. So what should be paid attention to when installing the  lifting chain?

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First, keep the two axles balanced and the two wheels in the same plane. The sprocket should be mounted on the shaft without skew and wobble. In the same transmission assembly, the end faces of the two sprockets should be in the same plane. When the center distance of the sprockets is less than 0.5 meters, the allowable deviation is 1 mm; when the center distance of the sprockets is more than 0.5 meters, the allowable deviation is 2 mm. However, it is not allowed to have the phenomenon of friction sprocket teeth. When replacing the sprocket, care must be taken to check and adjust the offset,

Secondly, check whether the sprocket and the shaft are connected reliably, and the key strip is not allowed to be over-tensioned. The tightness of the lifting chain should be appropriate, too tight will increase power consumption, and the bearing will be easy to wear; The tightness of the chain is: lifted or pressed from the middle of the chain, the center distance of the two sprockets is about 2%-3%.

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Thirdly, keep a certain gap between the chain and the chain cover, and do not use the new chain with the severely worn sprocket. After the sprocket is seriously worn, it should be replaced with a new sprocket and a new chain at the same time to ensure good meshing. You can't just replace a new chain or a new sprocket alone. Otherwise, it will cause poor meshing and accelerate the wear of the new chain or the new sprocket. After the sprocket tooth surface is worn to a certain extent, it should be turned over and used in time (referring to the sprocket used on the adjustable surface) to prolong the use time.

Finally, connect the arrowhead ring reliably, and the opening of the circlip is opposite to the direction of rotation. If the new hoisting chain is too long or stretched after use, it is difficult to adjust. The key section can be removed according to the situation, but it must be an even number. The link should pass through the back of the chain, the cleat should be inserted outside, and the opening of the cleat should be in the opposite direction of rotation.

The correct installation of the lifting chain can ensure the correct use of the lifting chain. The lifting chain should remember to add lubricating oil in time during work. The lubricating oil must enter the matching clearance of the roller and the inner sleeve in order to improve the working conditions and reduce the damage.