How to deal with the problem of overheating of tapered roller bearings

In the practical application of tapered roller bearings, the problem of bearing heating is often encountered, how to deal with it?

First of all, it is necessary to understand the cause of the heating of the column roller bearing.

The reasons why tapered roller bearings exceed the normal temperature during operation may be as follows:

1. The contact surface between the bearing and the journal is too small (the fit clearance is too small), and the specific pressure per unit area is too large, which mostly occurs after the trial operation of the new machine or the replacement of the new bearing bush.

2. Bearing deflection or crankshaft bending or distortion.

3, the quality of the bearing bush is not good, the quality of the lubricating oil is not consistent (low viscosity), or the oil road is blocked. The oil supply pressure of the gear oil pump is too low and the oil supply is interrupted, resulting in a lack of oil in the bearing bush and dry friction.

4. The bearing has sundries or lubricating oil too much, too dirty.

5. The bearing bush has uneven excessive wear.

6. when the compressor is installed, the spindle and the motor (or diesel engine) spindle coupling are not aligned, and the error is too large, resulting in the tilt of the two shafts.

After knowing the cause of bearing fever, we can prescribe the right medicine to the case.

Exclusion method:

1. Scrape and grind the bearing bush by painting method to make its contact surface meet the requirements and improve the specific pressure per unit area.

2. Properly adjust the fit clearance, check the bending and distortion of the crankshaft, replace the crankshaft or repair it as appropriate.

3. Use the quality bearing bush, check the oil pipe and gear oil pump, use the lubricating oil that meets the quality requirements, check and adjust the oil pump to make the pressure meet the requirements.

4. Clean and replace the new oil and adjust the oil pressure.

5. Replace the new bearing bush.

6. The concentricity of the two machines should be correct, and the leveling tolerance should conform to the value specified in the machine manual. Especially when the rigid connection is used between the compressor and the motor, more attention should be paid to the alignment.