What is the role of bearing preload,

What is the way and its mechanism of action of high temperature bearing preload is what ordinary rolling high temperature bearing under working state has certain gap. In order to achieve a specific purpose, however, when high temperature bearing, after a certain high temperature bearing adjustment method of get certain internal load, gaps in a negative state, this method is called the preloaded. For rolling bearing high temperature, the proper preload can be used for the following purposes: 1, the rotation accuracy of progress. High temperature bearing load, in order to eliminate internal clearance, to accept a certain amount of preloading, the roller support ring from all directions, can improve the rotation accuracy, shaft can be absolutely is axial and radial location, as described in the rotation of the axis precision, such as the temperature of the machine tool spindle bearing measuring instruments, etc. 2, progress and stiffness. Rolling element and raceway contact point is conducted through the elastic contact, the rolling element is regarded as a spring. There are high temperature bearing clearance, as long as according to the research direction of forces a few spring support. Preloaded after the high temperature of bearing, the developing direction of students have spring support, and has a certain amount of preloading, accept the working load of rolling number more than have a game, so we can progress with stiffness. High temperature ball bearings, ball contact with the channel distortion and the relationship between the load data management is nonlinear, with the increase of pre-load, contact stiffness requirements of progress. 3, to reduce the friction and wear, chatter. Spherical bearing is deep groove ball bearing temperature variation, high temperature practice is characteristic of its outer diameter of the spherical appearance, can coordinate the alignment of the corresponding concave spherical bearing shell temperature effect of the function. Spherical bearing is mainly used for temperature accept the combination of radial load mainly radial and axial load, should not be individually receive normal axial load. No flutter lower roughness of machine tools, or frequent start and stop the control mechanism of the friction and abrasion. 4, control rolling body of revolution and rotation of the sliding failure phenomenon. Set-contained bearing spherical temperature using high temperature bearing such research on the design also has a certain adjustable mind, easy processing equipment, has a dual structure of sealing equipment installation society, able to work under harsh environment. High temperature bearing common is to use type cast formation. Arrange ushering high temperature bearing is smooth grease seal type high temperature deep groove ball bearing and all kinds of different shape of high temperature bearing combination development of technology products and high precision components. High temperature bearing components can simultaneously after we a few part of the bolt is directly related to the device to the body of the mechanical engineering installation, with the heart function, can choose to stop smooth fat supplement, etc. , is an important device is need to use very complex troublesome products. As used in the analysis of high-frequency motor use high temperature angular contact ball bearings and cylindrical roller bearing high temperature, etc on the jet. 5. Improve the high temperature bearing life. Preloaded, increased Numbers of the rolling element load, load on each roller, load can be evenly distributed on each roller, to improve the service life of high temperature bearing. Figure 6. Improve the damping and noise reduction performance of high temperature bearing. Between the rolling element and raceway preloaded oil film stability, improve the damping between the rolling element and raceway, improved the dynamic characteristics of supporting structure, reducing the noise. 7, to improve the dynamic characteristics in the high temperature of angular contact ball bearings. A: what is the purpose of bearing lubrication to the next: no