Bearing design and structure of double-interior diameter support high speed gyro motor

Abstract

The invention discloses a bearing structure of a dual-inner diameter supported high-speed gyro motor. In the bearing structure, the section of an outer ring 6 takes a symmetrical Z shape, a plurality of rolling elements 9 are arranged in a unilateral skewed slot of the outer ring, the unilateral skewed slot is separated by a retainer 8, matched with the diameters of the rolling elements and supported by a bearing inner ring 7 with a concave circular race, both the width of the inner ring and the total width of the retainer are shorter than the inner width of the unilateral skewed slot of the outer ring and a straight line segment, a small inner diameter of the outer ring adjacent to the inner width is shorter than a big inner diameter of the inner ring, and the big inner diameter and the width of the inner ring are closely matched with an L-shaped end cover 10 which is matched with a step surface of an outer rotor 3 of the gyro motor. The big inner diameter of the inner ring is increased to rotate together with the matched L-shaped end cover with the movement of the outer rotor, the small inner diameter of the outer ring keeps relatively still along with a gyro motor shaft, which causes that the speed ratio of the rolling elements is 1.25 / 0.75=1.67 when the outer ring rotates, the inner ring keeps still, the relative bearing inner ring rotates and the outer ring keeps still, the rotation speed of the rolling elements is reduced, the times of friction with the race is reduced by 67%, and the wear life of the bearing is prolonged by 50%.

Description

technical field [0001] The invention belongs to the technical field of bearings, in particular to a bearing design method for a high-speed gyro motor supported by double inner diameters. Background technique [0002] Liquid floating gyro motors are often used in aviation, navigation, and space navigation systems. The motor shaft of the gyro motor is supported by two sets of separate angular contact ball bearings. For specific structures, see figure 1 . The gyro motor is composed of a motor shaft 1, a coil 2, an outer rotor 3, and a magnetic steel 4. Angular contact ball bearings 5 ​​are installed at both ends of the gyro motor. The outer ring of the bearing 5 rotates with the outer rotor 3 of the gyro motor. When installing, the inner diameter of the bearing 5 Cooperate with motor shaft 1, outer diameter and outer rotor 3. Since the structure of the motor shaft 1 is two symmetrical steps, the inner diameter of the installed bearing 5 is also relatively small. [0003] The...

AI Technical Summary

Problems solved by technology

Due to the weight requirements of the gyro motor and the main engine, the bearing 5 is not allowed to be attached to other external oil supply devices, so there is a problem of insufficient lubrication of the bearing 5 at high speeds, and its service life is also greatly affected. Therefore, this structure The service life of the bearing 5 is generally not high, and it is difficult to meet the requirements of use

Images