The main rolling line equipment after the transformation of Shuigang No. 2 Rolling Mill has used a large number of bevel gear transmissions and pairs of tapered roller bearings. After more than one year of operation, we have certain transmission performance for bevel gears and pairs of tapered roller bearings. Understand the understanding, some adjustment methods during maintenance and repair, explain the meshing side clearance of the bevel gear and the adjustment method of the pair of tapered roller bearing clearance. The meshing side clearance between the two gears directly affects the transmission quality. Improper adjustment can cause vibration, abnormal sound, and reduced gear life. The adjustment of the meshing side clearance and the contact surface of the spiral bevel gear: the assembly of the helical bevel gear shaft I and the adjustment principle of the clearance and the contact surface of the bevel gear meshing and the installation position of the gearbox body, and the broken line is the speed reduction casing body. The adjustment principle of the meshing side clearance and the contact surface of the bevel gear is as follows: a gasket is arranged between the right end surface of the bearing sleeve and the speed reduction casing body, and the axial displacement of the bevel gear shaft I is adjusted by increasing or decreasing the thickness of the gasket to change the shaft. The purpose of meshing the side clearance with the bevel gear on the shaft II. Adjustment of contact surface and side clearance when helical bevel gears are engaged: requirements of contact surface when helical bevel gears mesh. The shape, size and position of the contact surface on the helical bevel gear teeth are important factors affecting the operation of the helical gear. Deviations or assembly errors will concentrate the load on the tooth end faces, causing premature wear of the gears. In the maintenance inspection, it is generally required that the contact surface reaches 60 to 80 of the tooth length along the tooth length direction, and the tooth height is 50 to 70 along the tooth height direction. When the load is small, the contact should be increased in order to improve the stability and reduce the noise. The relative area of ​​the face. When the load is heavy, the contact area is relatively reduced due to the influence of the contact surface offset under heavy load. Under the full load of the bevel gear, the contact surface will be extended and moved to the big end of the tooth. Therefore, during maintenance and repair, the contact surface should be biased toward the small end of the tooth, but it should have a distance of 2~4mm away from the edge of the small end. The required value of the side clearance of the spiral bevel gear is due to the axial force exerted by the spiral bevel gear to increase the tooth side clearance. When we measure the flank clearance by the pressure lead method, they mesh with each other through gear transmission. Measured, therefore the measured flank clearance must be greater than the true side clearance of the gear. The adjustment of the contact surface should pay attention to the contact position of the tooth surface while adjusting the side clearance. The adjustment method is similar to the adjustment of the tooth side clearance. The specific method is as follows: firstly, the shaft I small bevel gear is colored, and then meshed with the shaft II large bevel gear. Then check the contact surface of the large bevel gear. When the contact surface is too close to the small end, the gasket should be thickened. When the contact surface is close to the big end, the gasket should be thinned and adjusted according to this until it is adjusted to the ideal position.
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