1. Bearing parts

The water pressure test is carried out for the bearing lining cooling system, the test water pressure is set to 0.6MPa, and the water pressure is maintained for 1 hour. During the period, there is no leakage as the inspection is qualified. Flush the high-pressure oil chamber channel, then set the inlet oil pressure to 25MPa and maintain the oil pressure for 20 minutes. If there is no leakage, it is deemed qualified. The main bearing bottom plate needs to be hoisted to the position of the square box. The coal mill has two bearing bottom plates, and their processing surfaces need to be kept on the same horizontal plane. A level gauge is selected for calibration and the levelness is controlled at 0.1mm/m. In the inspection of the center lines of the two bearing bottom plates, the drawing method can be selected to control the error within 1mm. Hoist the main bearing to the bearing bottom plate to ensure uniform contact between the bearing and the bottom plate. Check the contact gap with a 0.1mm feeler gauge at intervals. If there is a large gap, make appropriate adjustments. Clean the bearing lining, saddle seat and other parts, apply lubricant, and put the bearing lining into the saddle seat.

2, rotation part

Rotate the left spiral tube to the fixed end cover, and rotate the right spiral tube to the movable end cover. For the inspection of the fit gap, choose a 0.55cm feeler gauge. When installing the end cover and the cylinder flange, in order to facilitate the installation, the mating surface can be brushed with lead oil to improve the contact effect of the mating surface, and then the fixed end cover and the movable end cover, M30 bolts are installed on the cylinder body After fixing, determine the matching clearance of the circumferential spigot, make appropriate adjustments to ensure that the two points of the cross are equal, then tighten the bolts and drive the pins. After the assembly of the cylinder body and the end cover is completed, the whole is hoisted to the main bearing bush to ensure that the inner hole of the main bearing and the end cover journal are not clamped. After completing the installation of the transmission part, it is necessary to calibrate the gap between the oil sling ring of the movable end cover journal and the bearing bush. The gap needs to exceed 20mm. Use a static level to check the level of the installation of the rotating part.

3, transmission part

On the one hand, check the lateral clearance between the small gear and the large gear. According to the position of the large gear, select the appropriate center distance to install the small gear. Check the parallelism deviation of the small gear and the large gear central axis to ensure that the error per meter is within Within 0.15mm, in addition, it is necessary to conduct a detailed inspection of the meshing of the large and small gears in conjunction with the lateral clearance, and check that the clearance is within 1.24~2.19mm. There are several inspection methods for the inspection of tooth side clearance: ①Use a feeler gauge to measure the inter-tooth clearance, rotate the pinion gear to ensure that the pinion gear and the large gear have a driving tooth surface contact, and then insert the feeler gauge into the driven surface , Measure the side clearance, and then measure the side clearance again at both ends of the tooth surface. If the large and small gears are installed correctly, then the two measured values ​​are the same; ②Choose the lead wire for measurement, and place the lead wire on the two gear tooth surface width ends , During the slow rotation of the gear, the lead wire can be meshed, and then use a micrometer to measure the thickness of the lead wire at the flattened part; ③There is not enough space near the bearing seat of the large and small gears of some equipment, and it is difficult for the feeler gauge to smoothly fit into the gear surface. The submeter is installed on the top of the pinion gear tooth surface, and then the pinion gear is rotated in both directions. In this way, the gear gap is measured. The gap value is the sum of the dial indicator readings. On the other hand, to test the meshing contact rate of the small gear and the large gear, the inspection of the meshing contact rate can be carried out by painting. Paint on the tooth surface of the large gear, apply 10 or so tooth surfaces continuously, and then rotate two After the gear is turned back to the painted position, observe the position of the dyed part of the tooth surface of the other gear. If the two gears mesh correctly, the dyed spots of the dyed part will be evenly distributed in the middle of the gear tooth surface. If the dyed spot of the dyed part is in the middle of the gear tooth surface The upper position of the gear surface indicates that the center distance is too large. If the dyeing point of the dyed part is lower than the middle of the gear surface, the center distance between the two gears is too small. If the dyeing point of the dyeing part is at the edge of the gear surface, It is necessary to adjust and calibrate the two gears.