Rolling Bearing Installation and Heating Installation Method
Rolling bearings are widely used in various fields of the machine. Rolling bearings must be accurately installed with strict attention to details and precise measurements to ensure their performance. The installation of rolling bearings includes mechanical and heating installation methods. This article will discuss the installation and heating installation method of rolling bearings in detail.
The mechanical installation of rolling bearings is to place the rolling bearing directly into the mating fit of the bearing, and then press the rolling bearing into the component. The pressing force should be uniform and evenly distributed during the installation process. This method is very suitable for small-sized rolling bearings with not too tight fit. During the installation process, the correct pressed fit is when the axial clearance between the rolling bearing and the component is 0.2-0.4mm, and the radial clearance between the rolling bearing and the component is about 0.4mm.
The heating installation of rolling bearings uses the principle that the thermal expansion of the rolling bearing is greater than the thermal expansion of the component, so when the rolling bearing is heated, the clearances of the inner and outer diameters of the rolling bearing and the component can be obtained. When the temperature of the rolling bearing reaches about 100-150°C, the rolling bearing can be directly installed in the component.
For rolling bearings with large diameter and rigid fit, thermal expansion installation is the most effective installation method. When the outside diameter of the rolling bearing is larger than the inner diameter of the component, the advantage of this method is that it can reduce the interference fit and easily complete the installation with a hammer.
In order to ensure the good performance of the rolling bearing, in the process of installation, the clearance and assembling of speed must be strictly controlled. First, the action should be quick and various factors must be avoided to ensure that the inner and outer rings of the bearing do not twist and the rolling elements do not roll out of the seat. Rolling bearings cannot be over-tightened when pressed. Third, to check the wheel case. If it is found that the wheel case is damaged, the wheel case should be destroyed immediately and replaced. Finally, the installation should always check and maintain the normal assembly clearance and not skew the inner and outer rings of the bearing.
In conclusion, the installation of rolling bearings must be done with strict attention to details and precise measurements. There are two common methods of installation, mechanical installation and heating installation. The mechanical installation method is used for small-sized rolling bearings with not too tight fit, and the heating installation method is used for large-sized rolling bearings with rigid fit. Proper installation of rolling bearings is the key to satisfactory operation of mechanical equipment.
