In many mechanical equipment, the spindle bearings are mostly angular contact ball bearings. Compared with other types of spindle bearings, this kind of bearing has the advantage of being able to carry both radial and axial forces. However, the heating problem is related to other types of spindle bearings. Spindle bearings still exist, so is it normal for angular contact ball bearings to heat up? What is the cause of heat generation?
Is it normal for angular contact ball bearings to heat up?
Under normal circumstances, as long as the temperature is within the range of use requirements, the heating of angular contact ball bearings is a normal phenomenon, especially when used in a spindle environment that rotates at high speeds, heating is inevitable, and friction is the main reason for the heating of angular contact ball bearings. reason.
The friction of angular contact ball bearings is very complex, mainly including differential sliding friction on the channel contact surface, spin sliding friction, friction caused by external loads, and viscous friction of lubricating oil, etc. Among them, the interactive influence of frictional heating and heat-induced load It has a greater impact on the heat generation of the bearing.
During the operation of angular contact ball bearings, thermally induced load and frictional heating interact with each other. The bearing generates frictional heating under the action of radial load, axial load, initial preload force and rotational speed, which increases the bearing temperature and generates heat-induced load. The thermally induced load affects the frictional heat of the bearing, causing the bearing temperature to further increase until the bearing temperature tends to a stable state.
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