Angular contact ball bearing preloaded and the comparison of constant pressure preload

Angular contact ball bearing, 轴承) Positioning of preloaded with constant pressure preload is as follows: ( 1) Located in equals the quantity of preloaded, preloaded diagonal contact ball bearing, 轴承) The effect of the rigidity increase ( 效果) Is larger, and positioning when the preloaded the influence of the stiffness change diagonal contact ball bearing load are much smaller. ( 2) In the use of (position preload 使用) , due to the shaft and angular contact ball bearings ( 轴承) The temperature of the seat, 温度) Difference caused by the axial length, radial expansion caused by the difference in temperature between inside and outside the circle ( 膨胀) Quantity and displacement caused by load, the effect of prestressing quantity will make changes; In use, and the constant pressure preload preload changes can be neglected. Radial pre-tightened radial top tight method use (more 使用) In bear radial load cone hole Angle contact ball bearing, 轴承) The classic example is a double row precision ( precise) Short cylindrical roller angular contact ball bearing, using the nut to adjust the angular contact ball bearing axial position relative to the cone axis neck, the inner ring with the expansion of the right ( 膨胀) Quantity and get negative radial clearance, this approach ( 方法) Used for machine tool spindle and jet engines (more 引擎) In the. Methods of axial pre-tightening axial preload in general can be divided into two locating preloaded and constant pressure preload. Such as cross section thin-walled bearing thin wall bearing ring can be a deep groove ball bearings ( C) At four o 'clock, contact bearing ( X) , angular contact ball bearings ( E) 。 Provide more various design in different series. Series depends on the size of the cross section. The ball and matching series. Deep groove ball bearings can support two-way axial load and radial load. In positioning preloaded, can be adjusted through sleeve or the size of the gasket, obtain proper preload; Can also be measured by ( cè liáng) Or control ( 控制) Starting friction torque to a tuning of preloaded right, Can also be used directly, 使用) Advance amount adjusted the preload of duplex angular contact ball bearing in pairs to achieve the purpose of the pre-tightening, generally do not need to users adjust any right now, all in all, by axial pre-tightening of angular contact ball bearing, using its relative position ( 位置) Won't change. Constant pressure is preloaded with the coil spring ( 春天) Etc, disc springs make angular contact ball bearing, 轴承) The proper preload method ( 方法) 。 Bearing the use of clean environment for bearing is very important. Such as cross section thin-walled bearing ring rotation surface and rough surface precision of the rolling element is about 1/10 microns, this smooth surface of the ball if polluted, its influence is very serious. Preloaded spring rigidity than angular contact ball bearing of much smaller rigidity, so constant pressure on the relative position of angular contact ball bearing in use will have change, but the preloaded were roughly the same amount to provide precision leadscrew angular contact bearings, the previous: there was a scar of angular contact ball bearing installation process under a: angular contact ball bearing installation and removal