The temperature of the bearing can generally be measured by the temperature outside the bearing. If the oil hole can directly measure the temperature of the bearing outer ring, it is more suitable. Usually, the temperature of the bearing rises slowly as the bearing starts to run, and reaches a steady state after 1-2 hours.
The normal temperature of the bearing varies with the heat capacity, heat dissipation, speed and load of the machine. If the lubrication and installation are not suitable, the bearing temperature will rise sharply and an abnormally high temperature will occur.
At this time, it is necessary to stop the operation and take necessary precautions. The thermal sensor can be used to monitor the operating temperature of the bearing at any time, and automatically alarm or stop the occurrence of a burning shaft accident when the temperature exceeds the specified value.
High temperatures often indicate that the bearing is in an abnormal condition. High temperatures are detrimental to the lubricant of the bearing, and sometimes the bearing overheating can also be attributed to the lubricant of the bearing. Long-term continuous rotation of the bearing at temperatures above 125 °C will reduce bearing life.
Causes of high temperature in the bearing include: insufficient lubrication or excessive lubrication, impurities in the lubricant, excessive load, loss of bearing damage, insufficient clearance, and high friction caused by the oil seal.