Bearing temperature is too high will reduce the service life of bearings, and even cause bearing burnout.Therefore, to quickly determine the cause of the failure and take appropriate measures to solve it is the guarantee of the continuous and safe operation of the equipment.

1, the amount of oil is not appropriate, too much or too little lubrication grease:

The bearing box shall be regularly refueled according to the requirements of the work.The bearing will sometimes have high temperature after refueling, mainly because of too much refueling.At this time, the phenomenon is that the temperature continues to rise, and after reaching a certain point (generally about 10℃~15℃ higher than the normal operating temperature), it will remain unchanged, and then it will gradually decline.

2, the added oil does not meet the requirements or is contaminated:

The selection of lubricating oil is not appropriate, it is not easy to form a uniform lubricating oil film, can not reduce the internal friction and wear of the bearing, insufficient lubrication, and the bearing temperature rises.

When different types of grease are mixed, chemical reactions may occur, resulting in deterioration and caking of the grease, reducing the lubrication effect.

Oil pollution will also increase the bearing temperature. Dust falls into the grease in the process of greasing, resulting in oil pollution, deterioration of the oil inside the bearing box and damage to bearing lubrication, and the temperature rises.

Therefore, appropriate grease should be selected. The bearing box and bearings should be cleaned during maintenance, and the refueling pipeline should be checked and cleared. Different types of grease should not be mixed.When replacing other types of grease, the original grease should be cleaned up first.Add grease regularly during operation and maintenance, and the grease should be properly kept for moisture-proof and dust-proof measures.

3. Insufficient cooling:

Check whether the pipeline is blocked and whether the inlet oil temperature and return water temperature exceed the standard.

If the cooler is not selected properly, the cooling effect is poor, and the operation requirements cannot be met, it should be replaced in time or a new cooler should be installed in parallel.The axial induced draft fan should also check the heat preservation and sealing of the core barrel.

4. When there is no problem in the above aspects, check the coupling:

The coupling must be found according to the process standard.In the alignment of axial induced draft fan and hydraulic coupler, the problem of thermal expansion of equipment in operation should also be considered.The impeller side of the induced draft fan expands due to heat, and the bearing box rises;The temperature of the hydraulic coupler increases in the operation of the bearing box, and the bearing bearing rises, so the alignment motor should be higher, and the size of the reserve should be determined according to the characteristics of the equipment and the temperature parameters in the operation.