Electromagnetic drive device for measuring rolling bearing friction torque and its measuring method

Abstract

The invention discloses an electromagnetic driving device for measuring friction torque of a rolling bearing, and a measuring method thereof. Aiming at the problems that the existing rolling bearing friction torque measuring method is low in precision and difficult to assess the performance of a rolling bearing precisely, the electromagnetic driving device comprises a fixed bottom plate, a fixed base, a chuck, a photoelectric detecting device, an annular electromagnet, a bearing inner shaft, a sleeve and a grating disc. The electromagnetic driving device provides a sustained and stable external magnetic field by means of the electromagnet, so that a charged metal lead wire at the edge of the sleeve outside the bearing is forced to drive an external bearing to rotate, a number of pulse signals of a photoelectric encoder at the outer edge of the sleeve is recorded by means of a counter to obtain a rotation angle at which a bearing to be tested rotates, and the precise bearing friction torque can be calculated indirectly according to the conservation of energy.

Description

technical field [0001] The invention belongs to the field of rolling bearing detection, and in particular relates to an electromagnetic drive device and a measuring method for measuring friction torque of rolling bearings. Background technique [0002] At present, rolling bearings are widely used in various fields due to their simple structure, low friction, and easy maintenance. With the rapid development of industrial technology, the performance requirements for rolling bearings continue to increase. How to further improve the performance of rolling bearings while maintaining the original advantages? Performance has become a common problem in the machinery industry. The friction torque of the bearing is a comprehensive reflection of the stability and lubricity of the bearing. Excessive friction torque will not only generate vibration and noise, reduce the stability of the system, but also lead to a sharp rise in temperature during operation, and accelerate the deterioratio...

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Problems solved by technology

[0004] Aiming at the problems of low measurement accuracy and inaccurate measurement of rolling bearing friction torque, which makes it difficult to accurately evaluate the performance of rolling bearings, the present invention proposes an electromagnetic drive device for measuring rolling bearing friction torque and its measurement method, and abandons the use of torque sensors as the main measurement method. The traditional method innovatively proposes an electromagnetic drive method, which provides a continuous and stable external magnetic field through the electromagnet, so that the charged metal wire on the edge of the outer sleeve of the bearing is forced to drive the outer bearing to rotate, and at the same time, the counter records the photoelectricity of the outer edge of the sleeve. The number of pulse signals of the encoder can be used to obtain the rotation angle of the bearing to be tested, and then the accurate bearing friction torque can be calculated indirectly according to energy conservation

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