The radial spherical plain bearing has many advantages, such as it can withstand a large load, and also has strong impact resistance, and has excellent performance in the impact resistance, corrosion resistance, wear resistance and so on. Because of its excellent performance, the radial spherical plain bearing is usually used to bear the radial load.
In practical applications, because of their different contact angles, they can be divided into different types. Normally, when the nominal contact angle is 0 degrees, it belongs to the radial contact radial spherical plain bearing, which is usually used to bear the radial load. In some cases, it can also be used to withstand both the radial load and the smaller axial load.
There is also a kind of angular contact radial spherical plain bearing. The nominal contact angle of the bearing is usually between 0 and 45 degrees, which may bear the combined load of both radial and axial loads.
It should be noted that in the installation of the radial spherical plain bearing, taking into account the use requirements, it is necessary to pay attention to the reasonable choice of the clearance. This is because on the one hand, it needs to meet the high precision installation requirements. On the other hand, it needs to meet the requirements of high temperature conditions. Therefore, the two problems should be considered: 1. The size change and hardness change in the process of rising from the ordinary temperature to high temperature. 2. The force system changes and shape changes caused by the centrifugal force in the high speed running state.
However, in the actual work, it is difficult to meet both conditions at the same time. In order to minimize the rollaway nest deformation after the installation of the radial spherical plain bearing. The interference fit shrink range is generally controlled within a small range.
In addition, in the selection of the radial spherical plain bearing clearance, we also need to take into account the thermal elongation of the shaft and other impact on the clearance. Under normal conditions, the radial spherical plain bearing should achieve the best clearance at the normal operating temperature, and the clearance is determined in the state of accurate alignment of the inner and outer ring groove center.