Face-to-face pairing miniature ball bearing friction torque test method under application axial direction load

Abstract

The invention provides a face-to-face pairing miniature ball bearing friction torque test method under application axial direction load. A system of the method comprises an auxiliary apparatus which comprises a preload bolt (1), a load ring (2) and a back shaft (6). A first detected miniature ball bearing (3) and a second detected miniature ball bearing (4) are paired and are installed in the auxiliary apparatus. Through applying axial direction load to an outer ring axial direction transverse plane of the second detected miniature ball bearing by using the preload bolt, and the assembled auxiliary apparatus is installed on a miniature ball bearing friction torque tester, a total weight of the preload bolt (1), the load ring (2) and a raster rotor forms axial force of the first detected miniature ball bearing and the second detected miniature ball bearing in a friction torque test. Under an effect of the axial force, through different rotating speeds or different rotation directions of a measuring head center pin (7), starting friction torque or dynamic friction torque of face-to-face pairing miniature ball bearing is measured. The method of the present invention has the characteristics of correctness, feasibility, a reliable result and easiness, and has a practical application effect.

Description

technical field [0001] The invention belongs to the technical field of friction torque testing of paired miniature ball bearings, and in particular relates to a method for testing friction torque of face-to-face paired miniature ball bearings under axial load. Background technique [0002] Some mechanisms in the fields of aerospace, aviation, and navigation require that the miniature ball bearings used have low friction torque, high positioning accuracy, and high axial and radial rigidity when working at low speed or swinging under strong vibration and impact conditions. . In order to meet these requirements, miniature ball bearings installed in pairs and with axial preload are mostly used. The friction torque of paired miniature ball bearings is a key factor to ensure the precise and reliable operation of some of the above mechanisms. Therefore, it is very important to accurately test the friction torque of paired miniature ball bearings. [0003] The method of axially fa...

AI Technical Summary

Problems solved by technology

[0004] At present, the miniature ball bearing friction torque tester used in the bearing industry can only be used to test the friction torque of a single set of miniature ball bearings. It is not possible to directly use the miniature ball bearing friction torque tester for the test of the friction torque of face-to-face paired miniature ball bearings. Through the cooperation of a set of auxiliary devices, the friction torque test of miniature ball bearings with face-to-face matching can be realized in the miniature ball bearing friction torque tester.

Images