Motor bearing design 1 The special structure and high-speed design of motor bearings are based on the elastic contact theory of the bearing, and the curvature of the rolling elements and rings are reasonably matched to meet the high-speed requirements of the 2-pole motor. Improve the bearing accuracy reserve rate and increase the limit speed of the bearing to meet the high-speed requirements of the 2-pole motor. Innovate the guiding method of the cage, increase the limit speed of the bearing, and meet the high-speed requirements of the 2-pole motor. Reduce the weight of the cage and the ring, reduce the moment of inertia of the bearing, and meet the high-speed requirements. Cooperate with relevant research institutions to conduct comprehensive research and take corresponding countermeasures in combination with the bearing model structure, the friction between the friction pairs of the bearing, and the internal lubrication (grease) of the bearing. Motor bearing special structure type and noise reduction design choose reasonable radial and axial clearance to reduce bearing noise. Reduce the raceway waviness, reduce the edge roundness, reduce the raceway roundness, and the noise reaches the Z3 group. Optimize the number and parameters of the raceway super-precision, reduce the waviness of the raceway, make the noise reach Z3 group, and reduce the influence of the geometric error of the solid frame pocket on the bearing performance. Reduce noise. Improve the cleanliness of the bearing and reduce the noise of the bearing. The special structure of the motor bearing and the design to eliminate the abnormal sound reduce the influence of the geometric error of the punching frame pocket on the abnormal sound of the bearing. Control the influence of radial and axial string momentum of the steel ball in the pocket of the punching frame on the abnormal sound of the bearing. Reduce the influence of the geometric shape error of the solid frame pocket on the bearing performance and reduce the noise. The design of other aspects of the motor bearing fully considers the lubrication problem in the structural design. The special oil circuit type suitable for high-speed operation is adopted to reduce the friction during high-speed rotation and improve the lubrication performance. According to the elastic contact theory of the bearing, the height of the ribs of the inner and outer rings is matched to meet the heavy load requirements of the pole motor. Increase the variety of non-contact sealed ball bearings, and select power supply bearings. For the contact form of the sealed ball bearing, reduce the friction coefficient. The bearing is designed with dust cover, fluororubber seal ring, and high temperature grease to meet the high temperature motor working condition. Various types of cages are used to suit various motors such as nylon frames, stamping frames, and copper frames. A variety of structure types are suitable 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.