The method of cooling the bearing
Source:未知Author:hyzc Addtime:2022-09-16 Click:
1 When the amount of refueling is improper and the lubricating oil is too much or too little
The bearing housing should be regularly refueled as required by the job. After the bearing is refueled, sometimes the temperature will be high, mainly due to excessive 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 gradually decrease.
2 When the added grease does not meet the requirements or is contaminated
The selection of lubricating grease is not suitable, it is not easy to form a uniform lubricating oil film, it cannot reduce the friction and wear inside the bearing, the lubrication is insufficient, and the bearing temperature rises.
When different types of grease are mixed, a chemical reaction may occur, causing the grease to deteriorate, agglomerate, and reduce the lubricating effect.
Contamination of the grease will also increase the bearing temperature, and dust will fall into the grease during the process of adding grease, causing grease pollution, resulting in the deterioration of the grease inside the bearing housing, destroying the bearing lubrication, and increasing the temperature.
Therefore, appropriate grease should be selected, the bearing housing and bearing should be cleaned during maintenance, and the refueling pipeline should be checked and dredged. Different types of grease should not be mixed; if other types of grease are replaced, the original grease should be cleaned first; Regularly add grease, grease should be properly stored for moisture-proof and dust-proof measures.
3 When the cooling is insufficient
Check whether the pipeline is blocked, and whether the inlet oil temperature and return water temperature exceed the standard.
If the selection of the cooler is inappropriate, the cooling effect is poor and cannot meet the requirements of use, it should be replaced in time or a new cooler should be installed in parallel. The axial flow induced draft fan should also check the insulation and sealing of the core cylinder.