Selecting the best bearing clearance The working clearance of the rolling bearing should be able to guarantee the safety of operation first, followed by obtaining the longest possible service life under this condition, thus establishing that the smaller the working clearance is, the better the working conditions are. Select the principle. There are six main factors that affect the bearing clearance: machining accuracy, bearing inner ring interference, bearing outer ring installation conditions, motor end cap assembly interference, working temperature and bearing load.

Correctly grasp the following three principles, so as to obtain the best free clearance range, and finally select the best working clearance. 1) Safe operation principle Working clearance is the decisive factor for safe and stable operation. The ball bearing is 0.005mm and the roller bearing is 0.01mm. It is the basic guarantee that in the worst operating conditions, it will not cause vicious accidents and cause major economic losses. condition. 2) Grasping the principle of environmental temperature The main factor affecting the working clearance is the working temperature, and the other factors affect the proportion of the operating environment. There is only a small proportion, and only comprehensive consideration is needed. No specific calculation is required. It is worth pointing out that the operating temperature is a statistical average value under certain operating conditions. It is different for different regions of the thermal equilibrium conditions, and usually focuses on the economic principle of the longest integral lifetime in order to obtain higher economic benefits. This means that each operating unit can appropriately reduce the clearance according to the average temperature or maximum temperature of its specific working environment. 3) Simplify the principle of management The free clearance of the bearing of the process document is set. Usually, relevant factors such as measurement accuracy, tooling equipment, and personnel technical level are also considered. In combination with practical experience, the calculation results are simplified and rounded to facilitate management. Practical and practical principles.

The mechanism of fatigue failure of rolling bearing and the fatigue failure process are analyzed in detail. The principle of choosing the best clearance of the bearing is put forward. This has a certain guiding effect on fatigue diagnosis of the bearing and prolonging the life of the bearing.

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