The disassembly of the inlet bearing shall be carried out with the same care as the installation. Pay attention not to damage imported bearings and parts, especially the disassembly of interference fit imported bearings, which is difficult to operate.
Therefore, in the design stage, it is necessary to consider the convenience of disassembly in advance, and it is also very important to design and manufacture disassembly tools according to needs. During disassembly, the disassembly method and sequence shall be studied according to the drawings, and the matching conditions of imported bearings shall be investigated, so as to ensure the safe disassembly operation.
Remove the outer ring of the interference fit. Set several outer ring extrusion screws on the circumference of the shell in advance. Tighten the screws equally while removing. These screw holes are usually covered with blind plugs, tapered roller bearings and other separate imported bearings. Several cuts are set on the housing shoulder. Use cushion blocks, disassemble with a press, or knock gently.
The inner ring can be easily removed by pressure machinery. At this time, pay attention to make the inner ring bear its pulling force.
The inner ring of large imported bearing is disassembled by oil pressure method. Oil pressure is applied through the oil hole arranged on the shaft to make it easy to pull out. For the imported bearing with large width, the oil pressure method is used together with the drawing fixture for disassembly.
The inner ring of Nu and NJ cylindrical roller bearings can be disassembled by induction heating. It is a method of drawing after heating part in a short time to expand the inner ring.
Disassemble the relatively small inlet bearing with fixed sleeve, support the inner ring with the stop fastened on the shaft, turn the nut back several times, and knock it with a hammer with a cushion block.
For large imported bearings, it is easier to disassemble them by oil pressure. Pressurize the oil in the oil hole on the taper hole shaft to expand the inner ring and disassemble the imported bearings. During operation, the inlet bearing may suddenly come out. It is better to use the nut as a stop.