Miniature bearing friction torque test device and test method

Abstract

The miniature bearing friction torque testing device includes a mounting mechanism, a loading mechanism and a detection mechanism; the mounting mechanism includes a main shaft, the test bearing is installed on the upper end of the main shaft, the outer ring of the test bearing is provided with a bearing sleeve, and the bearing sleeve is fixedly connected with a horizontally extending A transfer rod, the end of the transfer rod away from the bearing sleeve is fixedly connected with a thin iron needle, the upper end of the bearing sleeve is fixedly connected with a loading end cover, and the upper surface of the loading end cover is fixedly provided with mirror glass; the loading mechanism includes a The loading mandrel of the load, several loading weights are detachably sleeved on the loading mandrel, the lower end of the loading mandrel is provided with a tapered blind hole, and a high-precision steel ball is arranged between the loading mandrel and the mirror glass, and the high The upper part of the precision steel ball is movable in the tapered blind hole; the detection mechanism includes a force sensor and a permanent magnet, and the probe of the force sensor is located between the permanent magnet and the thin iron needle. The invention can accurately realize the test of the miniature bearing friction moment.

Description

technical field [0001] The invention relates to the technical field of miniature bearing testing, in particular to a miniature bearing friction torque testing device and a testing method. Background technique [0002] In recent years, precision miniature bearings used in all kinds of precision machinery, especially in instrumentation, satellites, rockets and other aerospace aspects, as well as ground laboratory equipment guidance systems, need to have good friction performance in order to achieve reliable monitoring and tracking, thus Guarantee the accuracy of the main engine, so that the instruments can work reliably and efficiently. With the continuous development of my country's machinery industry, all kinds of machinery, especially precision rotating machinery, are gradually developing in the direction of high speed, large load, good stability, and long life. Therefore, miniature bearings are also developing in the direction of high speed and large load, and have Good st...

AI Technical Summary

Problems solved by technology

However, for high-sensitivity miniature bearings, due to the complex application environment and the interference of other factors, it brings great difficulty to the actual research and testing of the friction torque of miniature bearings.

[0003] Due to the small friction torque of high-sensitivity miniature bearings, the traditional friction torque measurement method is difficult to meet the measurement needs of high-sensitivity miniature bearing friction torque in terms of measurement range and measurement accuracy. There are few related studies

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