bearing

Bearings, as an extremely important part of mechanical equipment, play a key role in ensuring the efficient operation of equipment for a long time. Bearing life is a key index to analyze bearing performance and durability, which has a significant impact on the reliability and maintenance cycle of equipment. In this paper, the concept of bearing life and influencing factors will be deeply analyzed.

1. Bearing life overview

Bearing life refers to the time that bearings can maintain normal operation before reaching a certain fatigue limit under certain working conditions. Fatigue limit refers to the load that cracks occur when the load borne by the bearing reaches its strength limit in continuous reciprocating motion.

Bearing life is generally expressed by rated life, which is the number of cycles in which 90% of bearings in the bearing assembly can reach or exceed the life under standard test conditions. The rated life is generally assessed by the number of cycles (L10), that is, the number of cycles that the bearing can run continuously in 90% of cases.

2. Factors affecting bearing life

Bearing life is affected by many factors, and understanding these factors is beneficial to evaluate the bearing life more accurately.

(1)Load: The load borne by the bearing is one of the main factors affecting its life. Excessive or uneven load will lead to bearing fatigue and shorten life.

(2)Speed: High-speed operation will increase the friction and heat of the bearing, so the speed has a significant impact on the bearing life.

(3)Lubrication: Good lubrication can effectively reduce friction and wear, extend bearing life. Suitable lubricating oil selection and timely replacement are the key to maintaining life.

(4)Operating temperature: The high temperature environment will accelerate the wear of the bearing, so maintaining a proper operating temperature is crucial to the life of the bearing.

(5)Environmental conditions: The environmental conditions of the bearing, such as dust, moisture, etc., will also have an impact on its life.