The allowable maximum temperature of domestic rolling bearings does not exceed 80 °C, and the maximum allowable temperature of imported bearings such as SKF bearings can reach 110 °C. During the normal operation and inspection, the hand touch is used to judge whether the bearing is hot or not, which is an irregular judgment.
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The common reasons for the high temperature rise of the water pump bearing are as follows:
(1) Too much lubricating oil (grease);
(2) The two shafts of the pump are misaligned, causing the bearing to be subjected to extra load;
(3) Machining errors of parts, especially the verticality of the end face that matches the bearing body and the pump seat, will also cause the bearing to be heated by additional interference force;
⑷ The pump body is interfered by the push-pull of the discharge pipe, which destroys the concentricity of the two shafts of the pump and causes the bearing to heat up;
⑸ Poor lubrication of the water pump bearing or the presence of sand or iron filings in the lubricating grease will also cause the bearing to heat up;
⑹ Insufficient bearing capacity of the water pump is a problem of water pump design selection, and mature products generally do not have this problem.
Treatment measures: Find out the cause of the fever and take corresponding improvement measures.
