Rolling bearing
According to different friction properties, bearings are divided into rolling bearings and sliding bearings. Rolling bearing plays a very important role in heat conduction oil pump, it is mainly used to support the rotor.
1) The structure of rolling bearings
(1) The basic structure of rolling bearings typical rolling bearings are usually composed of four components: inner ring, outer ring, rolling body and cage. The inner ring is arranged on the journal, and the outer ring is arranged in the bearing hole of the frame. Usually the inner ring is fixed externally with the rotation of the journal, but there are also fixed by the rotation of the outer ring and the inner ring. When the inner and outer rings rotate relative to each other, the rolling body rolls in the raceway of the inner and outer rings. The cage is used to evenly separate the rolling body. Rolling body is an indispensable part of rolling friction in bearings. Figure 6-20 shows the common scroll forms.
2) Clearance, contact Angle and offset Angle of rolling bearing The clearance, contact Angle and offset Angle of rolling bearing are the elements of jutuo E bearing's working performance.
(1) Clearance between the rolling body and the inner and outer raceway of the clearance bearing. Bearing clearance is divided into radial clearance and axial clearance. When a seat in the bearing is fixed, the other seat along the radial (or axial) from one extreme position to another extreme position of the amount of movement, called the radial (or axial) bearing swim
Gap. Clearance has a great influence on the working life, temperature rise and noise of bearings. Clearance of bearings of all levels of accuracy are standardized.
(2) Contact Angle The included Angle between the contact line of the bearing and the radial plane of the bearing is called contact Angle, as shown in Figure 6-22. It can be seen from the figure that the contact Angle of the centripetal ball bearing is when it is not subjected to load or pure radial load. When the axial load is applied, the contact Angle increases to a,. The change of bearing contact Angle is usually related to axial load, clearance, the ratio of raceway groove to ball radius and the elastic deformation of bearing parts.
(3) Because of the radial clearance of the offset Angle bearing, it can allow the deflection of the inner and outer rings caused by the shaft to have a certain relative deviation.
Common types of rolling bearings
There are many types of rolling bearings, and they are standard parts, which are mass-produced by professional bearing factories. So we are mainly through familiar type, standard and its application characteristics to choose reasonably.
