Analysis of disassembly techniques of bearings

 

Bearing disassembly should be carried out as carefully as installation. Pay attention to the bearing and all parts without damage, especially the disassembly of the interference fit bearing, which is difficult to operate. Therefore, in the design stage to take into account the convenience of disassembly in advance, according to the needs of the design and manufacture of disassembly tools is also very important. During disassembly, study the disassembly method and sequence according to the drawings, and investigate the matching conditions of bearings, so as to obtain the foolproof disassembly operation.

 

1. Disassembly of the outer ring

 

Remove the outer ring of the interference fit, set several screws for the outer ring extrusion screw on the circumference of the shell in advance, tighten the screw equally on one side, and remove at the same time. These screw holes are usually covered with blind plugs, tapered roller bearings and other separated type bearings, and several cuts are arranged on the shoulder of the housing block, and the pad is used to remove it with a press or gently knock it off.

 

2. Disassembly of cylindrical bore bearings

 

The inner ring can be removed with the latest simple pressure machine pull out. At this time, we should pay attention to let the inner ring bear its pulling force.

 

The inner ring of large bearing is disassembled by oil pressure method. Oil pressure is applied through an oil hole arranged in the shaft to make it easy to pull. For bearings with large width, the hydraulic method and the drawing fixture are used for disassembly.

 

The inner ring disassembly of NU type and NJ type cylindrical roller bearings can be performed by induction heating. In a short time to heat the local, so that the inner ring expansion after pulling method.

 

3. Disassembly of taper bearing

 

Remove the smaller bearing with a fixed sleeve, support the inner ring with the baffle that is fastened to the shaft, turn the nut back several times, and remove with a hammer using the pad.

 

Large bearing, the use of oil pressure disassembly is easier, in the cone hole shaft in the oil hole pressure oil, so that the inner ring expansion, disassembly bearing method. During operation, there is the possibility of the bearing coming out suddenly. It is better to use the nut as a gear block.