The rolling bearing preloading method is divided into two categories: axial preloading method and radial preloading method. The high temperature bearing factory () will briefly introduce the following for you: 1. Axial preloading method Axial preloading method can be roughly divided into positioning There are two kinds of preload and constant pressure preload. In the positioning preload, the appropriate preload can be obtained by adjusting the size of the bushing or gasket; the appropriate preload can also be adjusted by measuring or controlling the starting friction torque; the preload can also be directly adjusted by using To achieve the purpose of preloading, the user does not need to adjust again at this time. In short, any bearings that have been axially preloaded will definitely not change their relative position during use. Constant pressure preload is a method of using coil springs, disc springs, etc. to make bearings properly preloaded. The rigidity of the preload spring is generally much smaller than the rigidity of the bearing, so the relative position of the bearing with constant pressure preload will change during use, but the preload amount remains roughly the same. The comparison between positioning preload and constant pressure preload is as follows: (1) When the amount of preload is equal, the effect of positioning preload on the increase of bearing rigidity is greater, and the effect of rigidity change on bearing load during positioning preload is also much smaller. . (2) Positioning preload During use, the influence of the axial length difference caused by the temperature difference between the shaft and the bearing seat, the radial expansion caused by the temperature difference between the inner and outer rings, and the displacement caused by the load will cause the preload to be affected. When the constant pressure preload is in use, the change of the preload can be ignored. 2. Radial preloading method The radial jacking method is mostly used in tapered bore bearings bearing radial loads. A typical example is a double row precision short cylindrical roller bearing. The nut is used to adjust the bearing relative to the tapered journal. The axial position is so that the inner ring has a suitable amount of expansion to obtain radial negative clearance. This method is mostly used in machine tool spindles and jet engines. For more bearing technology, please pay attention to our company's official website: high temperature bearing http://
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