How To Disassemble Ina Bearing Scientifically
How To Disassemble Ina Bearing Scientifically
2021年12月28日
Correct Use And Common Faults Of Rolling Bearing
Correct Use And Common Faults Of Rolling Bearing
2021年12月29日

Disassembly Of Bearing

Disassembly Of Bearing

The disassembly of the bearing shall be carried out with the same care as the installation. Pay attention not to damage the bearing and parts, especially the disassembly of interference fit bearing, 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, Disassembly Of Bearing the disassembly method and sequence shall be studied according to the drawings, and the matching conditions of the bearing shall be investigated to ensure the safety of the disassembly operation.

1. Removal of outer ring

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. Disassembly Of Bearing These screw holes are usually covered with blind plugs, tapered roller bearings and other separate bearings. Several cuts are set on the housing shoulder. Use cushion blocks, disassemble with a press, or knock gently.

Disassembly Of Bearing

2. Disassembly of cylindrical bore bearing

The inner ring can be easily removed by pressure machinery. At this time, pay attention to make Disassembly Of Bearing the inner ring bear its pulling force.

The inner ring of large 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. Disassembly Of Bearing For the 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. Disassembly Of Bearing It is a method of drawing after heating part in a short time to expand the inner ring.

3. Disassembly of tapered bore bearing

Disassemble the relatively small bearing with fixed sleeve, support the inner ring with the stop fastened on the shaft, turn the nut back Disassembly Of Bearing several times, use the cushion block and knock it with a hammer for disassembly.

For large bearings, it is easier to disassemble by oil pressure. Disassembly Of Bearing Pressurize and send oil in the oil hole on the taper hole shaft to expand the inner ring and disassemble the bearing. During operation, the bearing may suddenly come out. It is better to use the nut as a stop.

Correct use and common faults of rolling bearing

The Reason Why The Installation Of Iko Self-Aligning Roller Bearing Indirectly Affects Its Service Life

There are dozens of rolling bearings in cars, including almost all common bearing types, large and small. The crash and damage of rolling bearings are also common. Since rolling bearings are generally installed insiDisassembly Of Bearing de the mechanism, it is inconvenient to conduct visual inspection. Only a brief judgment can be made according to the fault phenomenon, and then disassembled for inspection.

The correct use of rolling bearing is a reliable guarantee to reduce bearing failure and prolong Disassembly Of Bearing bearing life, including correct installation and reasonable lubrication.

The following describes the use requirements, Disassembly Of Bearing common faults and damages of rolling bearings.

Correct use of rolling bearing

1. Disassembly and assembly of bearing

The bearing shall be cleaned before installation. During installation, the auxiliary bearing shall be pressed straight and evenly with special tools. Do not knock with a hand hammer. In particular, it is forbidden to knock directly on the bearing. When the fit between the bearing race and the seat hole is loose, the seat hole shall be repaired or the bearing shall be replaced.

Do not reluctantly use the method of pitting or padding copper skin on the bearing mating surface. When disassembling the bearing, use a suitable puller to pull out the bearing, and do not knock the bearing with a chisel, hammer, etc.

2. Bearing lubrication

There are two kinds of lubricants commonly used in rolling bearings: lubricating oil and grease. When the circumferential speed of the shaft is less than 4-5m / s, or the parts on the vehicle that cannot be lubricated with lubricating oil, grease shall be used for lubrication. The advantage of grease lubrication is that the sealing structure is simple, the grease is not easy to lose, and it is not affected by temperature. Adding grease once can be used for a long time.

Two problems should be paid attention to when using grease. One is to select the appropriate brand of grease according to the requirements of the automobile manual. For example, nano base grease should not be selected for automobile water pump bearing because of its poor water resistance.

Second, the amount of lubricating grease added to the bearing should be appropriate. Generally, it is appropriate to fill only 1 / 2-L / 3 of the bearing cavity. Too much is not only useless, but also increases the running resistance of the bearing and heats it up.

Special attention should be paid to the automobile hub bearing. It is necessary to advocate “empty hub lubrication”, that is, only apply an appropriate layer of grease on the bearing. Otherwise, it will not only waste and poor heat dissipation, but also cause the grease to overflow due to heating, which may affect the braking performance.

The advantages of lubricating oil lubrication are low friction resistance and heat dissipation. It is mainly used for bearings with high speed and high working environment temperature. The brand of lubricating oil shall be selected according to the requirements of the vehicle manual, and shall be replaced in time after the vehicle maintenance cycle.

After discharging the old oil, the mechanism shall be cleaned before adding new oil. The oil shall be added to the specified marking line or flush with the oil filler (depending on the specific structure and requirements of the vehicle), and no more oil shall be added.