Thrust bearing friction torque measurement method and measurement apparatus

Abstract

The invention relates to a method for measuring friction torque of a thrust bearing according to a torque balance method. The method comprises the steps as follows: a thrust bearing (7) to be measured is placed between a load unit (15) and a drive unit (16), the load unit is connected with a torque sensor (2), a measurement rotating speed is firstly set in a computer to initiate a load command to exert axial load on an upper end of the thrust bearing to be measured, then a rotating command is initiated to the drive unit. The thrust bearing to be measured has friction torque M, when the lower end of the thrust bearing rotates, the upper end thereof also rotates, friction torque M0 produced by the torque sensor obstructs rotation of the upper end of the thrust bearing and maintains dynamic equilibrium with M, so that M0 of the thrust bearing produced by the torque sensor is equal to M of the thrust bearing to be measured and the method is called the torque balance method. Conversion, filtration, amplification are carried out on a measured M0 signal by the torque sensor by a front end circuit in a data processing system, the processed signal is output to the computer, an M dynamic curve is depicted by appraisal and analysis, and finally a maximum value, an average value and an undulating value are given.

Description

technical field [0001] The invention belongs to the technical field of bearing measurement, and in particular relates to a method and a measuring instrument for measuring thrust bearing friction torque. Background technique [0002] The friction torque of the thrust bearing is an important technical indicator for comprehensively evaluating the dynamic performance of the thrust bearing, that is, the magnitude and dispersion of the friction torque of the thrust bearing are quality indicators that users are very concerned about. However, the friction torque value of a thrust bearing is not a fixed value, but a variable, and its influencing factors are quite complicated, including the structural design parameters of the thrust bearing, the machining accuracy of each part, the manufacturing and assembly process, lubrication and cleanliness, etc. A comprehensive reflection of factors, including stable factors, but also many uncertain factors. It is reflected in the measurement re...

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Problems solved by technology

Since its loading has always been a difficult point in the measurement, there is no good direct measurement thrust bearing friction torque instrument in China

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