Motor bearing design 1 Special structural type and high-speed design of motor bearing According to the bearing elastic contact theory, the curvature of the rolling element and the ring are reasonably matched to meet the high-speed requirements of the 2-pole motor. Improve the bearing accuracy reserve rate, increase the bearing limit speed, and meet the high-speed requirements of the 2-pole motor. The guiding method of the cage is innovated, and the limit speed of the bearing is increased to meet the high-speed requirements of the 2-pole motor. Reduce the weight of the cage and the ferrule, reduce the moment of inertia of the bearing, and achieve high-speed requirements. Cooperate with relevant research institutions to conduct comprehensive research and take corresponding countermeasures in combination with bearing model structure, friction between bearing friction pairs, and bearing internal lubrication (grease).

The special structure of the motor bearing and the noise reduction design select reasonable radial and axial clearance to reduce the noise of the bearing. Reduce the waviness of the raceway, reduce the edge roundness, reduce the roundness of the raceway, and the noise reaches the Z3 group. Optimize the raceway superfinishing times and parameters, reduce the waviness of the raceway, make the noise reach the Z3 group, and reduce the influence of the geometrical error of the pocket hole of the solid frame on the bearing performance. Reduce noise. Improve bearing cleanliness and reduce bearing noise. The special structure of the motor bearing and the design of eliminating abnormal noise reduce the influence of the geometrical error of the punching frame pocket on the abnormal noise of the bearing. The influence of the radial and axial string momentum of the steel ball in the pocket of the stamping frame on the abnormal sound of the bearing is controlled. Reduce the impact of the geometric error of the pocket hole of the solid frame on the bearing performance and reduce the noise.

Other aspects of the motor bearing design fully consider the lubrication problem in the structural design. A special oil circuit type suitable for high-speed operation is adopted to reduce friction during high-speed rotation and improve lubricating performance. According to the bearing elastic contact theory, match the height of the inner and outer ring ribs to meet the heavy load requirements of the pole motor. Increase the variety of non-contact sealed ball bearings for motor bearings. For the contact form of sealed ball bearings, the coefficient of friction is reduced. Design bearing with dust cover and fluorine rubber seal ring, use high temperature grease, and meet the bearing for high temperature motor working conditions. Various types of cages are used to apply to various motors such as nylon, stamping, and copper. A variety of structure types are available for various motors. Such as deep groove ball bearings, cylindrical roller bearings, spherical roller bearings. ZWZ’s highest design and production of DT products are used in motors to replace imported bearings.