High precision gyro motor bearing loading method

Abstract

The invention relates to a high precision gyro motor bearing loading method. The loading can be achieved by using of a gyro motor loading device, and the gyro motor loading device consists of a machine frame, a platform surface, a horizontal guide rail system, a lifting guide rail system, two displacement sensors, an air bearing support, weights, an air shaft, a bearing centering sleeve and a bearing centering base. The centring can be achieved through a shaft at one end of the gyro motor, and the positioning can be achieved on an outer ring of a bearing, weights are placed in a weight plate, and required loads (namely, preloads) are added on an outer ring of a bearing at the other end through the air bearing. Then the size between two sets of bearing outer ring shaft shoulders is measured with a method of differential measurement through a displacement sensor 1 and a displacement sensor 2 which are calibrated. The height size of an outer rotor of the gyro motor is matched according to the measured size, and the post-installed preload of the gyro motor is guaranteed. The loading precision is greatly improved, errors caused by that the loading force does not pass through the center line of the motor bearing are eliminated, and the displacement measurement accuracy is improved.

Description

technical field [0001] The invention relates to a high-precision gyro motor bearing loading method, which can be used for high-precision loading of the gyro motor bearing of an inertia attitude sensor, and belongs to the technical field of gyro motors. Background technique [0002] Common gyro motors (or called gyro motors) are generally composed of four parts: bearings, rotors, hysteresis ring components and stator components, such as figure 1 As shown, 1 is a bearing, 2 is a stator part, 3 is a hysteresis ring part, and 4 is a rotor. [0003] Among them, the motor bearing adopts ordinary angular contact bearing or end cover angular contact bearing, which is one of the most important and critical components in the gyro motor, and plays the role of rotation guarantee and installation shell at the same time. In addition, the rotating part can achieve the effects of the smallest possible rotational friction torque, the highest possible rotational accuracy, and the longest pos...

AI Technical Summary

Problems solved by technology

[0014] This method is greatly affected by the accuracy of the current low-speed friction torque testing equipment, and the reflected bearing preload is sometimes too large and sometimes too small

And the low-speed friction torque test itself is also an indirect test, and the friction torque is also affected by factors such as the lubricating oil content inside the bearing

Therefore, the current method of measuring low-speed friction torque has low accuracy, and it is impossible to give specific bearing loading values ​​and accuracy

Images