The tightness of the industrial chain sprocket should be appropriate. Too tight will increase power consumption and the bearings are easy to wear; too loose sprocket will easily jump and fall off the chain. The tightness of the sprocket is as follows: lift or press down from the middle of the sprocket, and the center distance between the two sprocket is about 2%-3%. The sprocket sprocket should not swing and skew when installed on the shaft. In the same transmission assembly, the end faces of the two sprockets should be in the same plane. When the center distance of the sprocket is less than 0.5 meters, the deviation can be 1 mm; when the center distance of the sprocket is more than 0.5 meters, the deviation can be 2 mm. However, there must be no friction on the side surfaces of the sprocket teeth. If the two wheels offset too much, it will easily cause chain disconnection and accelerated wear. When replacing the sprocket, check and adjust the offset. After the sprocket is severely worn, the new sprocket and the new sprocket should be replaced at the same time to ensure good meshing. It is not possible to replace only a new sprocket or a new sprocket alone. Otherwise it will cause poor meshing and accelerate the wear of new sprocket or new sprocket. When the tooth surface of the sprocket is worn to a certain degree, it should be turned over and used in time (referring to the sprocket used with adjustable surface) to extend the use time.

The new sprocket is too long or stretched after use, which is difficult to adjust. You can remove the chain link depending on the situation, but it must be an even number. The chain link should pass through the back of the sprocket, the lock piece should be inserted outside, and the opening of the lock piece should face the opposite direction of rotation. The sprocket should be filled with lubricant in time during work. Lubricating oil must enter the matching gap between the roller and the inner sleeve to improve working conditions and reduce wear. The old sprocket cannot be mixed with some new sprocket, otherwise it is easy to produce impact in the transmission and break the sprocket. When the machine is stored for a long time, the sprocket should be removed and cleaned with kerosene or diesel oil, and then coated with oil or butter and stored in a dry place. First find out the part with larger offset error, so first measure the side offset of the coupling, that is, measure the level and coaxiality of the main shaft and the level and coaxiality of the reducer main shaft, and then press the quality again. Standard copy leveling can eliminate the fault. The reason for the gear wear of the coupling gear of the lifting accessories is basically similar. In addition to the normal force, the connecting bolt is also subjected to an additional bending moment, which causes it to break. If such failures have been found, the hoist is a JK-2.5/11.5 single-rope winding hoist. At that time, the concentricity deviation of the coupling was measured to be 2n, and the reducer side was low, resulting in the coupling of lifting accessories The gear can't work, the axial displacement of the inner gear ring exceeds the tooth width. After surveying and mapping, the reducer should be re-calibrated according to the quality standard. After adjustment, it runs normally and the fault is eliminated. In addition, the horizontality and concentricity of the two shafts have a large error, which causes the coupling to be awkward when rotating.