From which aspects should the ball mill overhaul proceed

1. maintenance cycle:

1 month after repair; 1~3 months for minor repair; 12~24 months for medium repair; 60~120 months for major repair.

Contents of 2. overhaul:

1. After repair: mainly check the oil quantity, adjust the clearance of each part, strengthen each bolt, replace individual lining board or check the wear of lining board, and repair the feeder.

2. minor repair: check, clean and measure the wear of tooth surface, check the wear of lining plate, and replace it if necessary.

3. Medium repair: replace the parts of the feeding part, replace the small gear wheel and bearing of the transmission, and disassemble the reduction gearbox for inspection. The large gear can be adjusted and used according to the situation in 3~5 years of operation, and the hollow shaft should be measured in 3~5 years of operation.

4. Overhaul: disassemble, inspect, clean and measure, repair or replace large gears, hollow shafts, spherical tiles, transmission shafts, small gears and cylinders according to wear conditions, repair and replace electrical components, and conduct trial operation after overhaul of electrical equipment. Acceptance work.

3. overhaul standard:

1. The processing surfaces on the two bearing bases are on the same horizontal plane, with the center spacing tolerance of 1mm, the non-parallelism deviation of the longitudinal center line of 0.5mm, and the deviation of the transverse center line of 0.5mm per meter.

2. The spherical contact surface of the shoe seat shall have uniform joint angle. Not less than 1~2 points per 50 × 50mm2; The contact surface between the hollow shaft and the tile shall be 90~100 not less than 2 points per square inch, and the clearance between the journal and the bearing is approximately the same.

3. The mating surface of the cylinder flange and the front end cover shall ensure good contact, and no gasket shall be added. The tolerance of different axial degrees of the two hollow shafts shall be less than 0.8mm. When connecting, assembling and correcting the large gear ring and the cylinder end cover, the thrust shall be firm and the positioning pin shall be installed. The radial swing of the gear ring shall not be more than 0.5mm, and the axial swing shall not be more than 0.84mm.

4. When installing the liner, the end cover should be installed first. The liner of the cylinder should start from the population and be carried out according to the assembly requirements. The screws should be tightened evenly without water leakage. There shall be no gap between the rubber lining plate and the gap shall be blocked with sponge.

5. The center line of the small gear shall be parallel to the center line of the large gear, and the deviation shall not be more than 0.2mm per meter. The top clearance is 1/4 modulus, the side clearance is 1.06~1.8mm, the contact area of the tooth surface is not less than 50 of the tooth length and 40 of the tooth height.

6, reducer, motor and drive shaft transmission coupling should maintain a high degree of coaxiality, the center line of different axis is not more than 0.3mm, the center line inclination is less than 1/1000. As long as you pay attention to the above three points, it is easy to improve the working performance of the ball mill, increase the grinding fineness, and prepare for the next flotation.