Friction is one of the ubiquitous basic physical phenomena. As long as there are surfaces in relative motion, friction will occur and may cause wear. Friction is one of the main ways of mechanical energy consumption and one of the main causes of mechanical failure. As servo products and energy equipment continue to develop towards high speed and high power, reasonable lubrication design plays a decisive role in the accuracy and reliability of high-end intelligent equipment. High-end bearings are indispensable basic components in mechanical equipment and are widely used. In many industries such as energy, power, manufacturing, chemical industry, and shipbuilding. Bearing technology often determines the performance and life of the main engine. It has a large radiation effect and strong driving force, and has an important impact on the development of the national economy and national defense construction.