A device and method for measuring rolling bearing friction torque

Abstract

The invention discloses a device and a method for measuring friction torque of a rolling bearing. 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 device comprises a motor, a lead screw sliding table, an S-type force sensor, friction block mounting angle aluminum, a friction block, a chuck, a shaft, a sleeve, a linear guide rail, a grating disc, a photoelectric detecting device and a bottom plate. According to the device, the motor drives the lead screw sliding table to drive the friction block to move, the friction energy in the bearing is equivalent to the friction work between the friction block and the sleeve, the variation of a frictional force is measured by means of the strain type force sensor, such that the measurement of the friction work is more precise, a number of pulse signals of a photoelectric encoder at the outer edge of the sleeve isrecorded by means of a processor to obtain a rotation angle at which a bearing to be measured rotates, the traditional mode of directly measuring the friction torque is changed into indirect calculation of friction torque according to an energy conservation mode, thus the result is more reliable and the accuracy rate is improved.

Description

technical field [0001] The invention belongs to the technical field of bearing testing, and in particular relates to a device and method for measuring rolling bearing friction torque with simple structure and high precision. Background technique [0002] With the improvement of my country's industrial level, bearings are widely used in aerospace, precision machine tools, high-speed electric spindles, rail transit, ultra-precision medical machinery and other fields. The friction torque of the bearing is the comprehensive performance of the bearing lubrication state and operating performance. Excessive friction torque will lead to excessive temperature rise of the bearing during operation, thereby reducing lubrication performance, increasing friction loss, and eventually accelerating bearing fatigue damage. At the same time, the friction torque is also a major cause of bearing vibration and noise, which seriously affects the dynamic performance of the bearing. Therefore, how ...

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the problem of low precision and inaccurate measurement of the existing rolling bearing friction torque measurement method, which makes it difficult to achieve precise measurement, and proposes a device and method for measuring rolling bearing friction torque with high precision and simple structure, which avoids the traditional direct use of torque Insufficient sensor measurement, the motor drives the ball screw slide table to drive the friction block to move, the friction energy in the bearing is equivalent to the friction work between the friction block and the sleeve, and the change of the friction force is measured by the strain gauge force sensor. Make the measurement of frictional work more accurate, and at the same time record the number of pulse signals of the photoelectric encoder on the outer edge of the sleeve through the processor to obtain the angle of rotation of the bearing to be tested, and change the traditional method of directly measuring friction torque to an indirect method of energy conservation Calculated to make the results more reliable and improve the accuracy

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