You don't know the knowledge about bearing preload

In most of the running situation of rolling bearing preload, rolling bearing has a moderate clearance application. According to different purpose, also is to have when installing a bearing, in advance to make bearing cause internal stress, it is convenient to be used in bearing under negative clearance, this kind of operation method called preloaded. Most such as angular contact bearings and tapered roller bearings, bearing can use two opposed, clearance adjustable bearing. The purpose of bearing preload in shaft axial and radial precise positioning and to suppress the vibration of shaft and improve the precision of rotation. Such as lathe spindle bearing and testing instruments. Improve the bending stiffness. Each bearing preloaded bearing, there is a roller support, and has a certain amount of prestressed tensioning, bear the load of rolling number more than have a clearance, thus can improve the bending stiffness. Such as car differential with bearings. To improve the service life of rolling bearing. Preloaded, bearing roller for ascension, each rolling element load reduced, load can relatively well-balanced spread on each rolling element and can improve the service life of bearing. To improve the bearing vibration and noise reduction. Preloaded roller and cage to create a stable oil, improve the vibration between the rolling element and cage, reduce noise. Such as small motor bearings. Improve dynamic characteristics of angular contact bearings. In high speed angular contact bearings, moderately preloaded gyro image rotation to avoid the steel ball, avoid or reduce the rotation of the ball, wandering, also can control the ball the magnetic moment of a drag. Keep rolling body relativity appropriate parts of the ring. Thrust ball bearings, thrust spherical roller bearings, etc. , when used in standard axle. Damaged in the operation. Bearing in operation caused by damage to the clearance of the ascension, this kind of situation according to the preloaded to compensate. Way of rolling bearing preload bearing pre-tightening way is divided into two categories: precision positioning preloaded and the practical significance of the uniform preloaded bearing pre-tightening beyond the required level, if the pre-tightening force may cause abnormal hot, friction torque, tired to reduce the service life. Above is today give you share the contents of the author, to learn more about bearing small knowledge, pay attention to the bearing's official website.