Method for measuring non-contact type bearing startup friction torque and measuring instrument thereof

Abstract

An apparatus for measuring non contact type bearing start friction torque, is composed mainly of a loading cylinder (1), a force transducer (2), a loading housing (3), an air main shaft (5), an air bearing (6), a torque generator (7), a disk drive (8), an optoelectric transducer (9), an electrical system. The torque generator generates induction electromagnetic torque as drive torque, the optoelectric transducer monitors bearing start running state automatically; when being measured, the measured bearing is installed on the air main shaft, the disk drive is linked with the air main shaft and placed in the torque generator, the electrical system applies input power to the torque generator step by step after throwing axial load, when the induction electromagnetism drives the air main shaft to rotate through the disk drive, the optoelectric transducer matching-installed by the disk drive monitors the measured bearing from static state to start running state, and outputs signal to stop applying input power, and records current power value which is the start friction torque value of the measured bearing.

Description

technical field [0001] The invention belongs to the technical field of bearing friction torque measurement, and in particular relates to a non-contact bearing starting friction torque measurement method and a measuring instrument. Background technique [0002] The starting friction performance of the bearing is one of the important technical indicators of the dynamic performance quality of the bearing. It is an important factor affecting the life of the bearing and the reliability and accuracy of the host system. Under normal starting conditions, the magnitude and fluctuation of the friction torque directly affect the life, stability and reliability of the system, so there are extremely strict requirements for the starting friction torque. Foreign countries pay more attention to the research of bearing starting friction, but domestically there is no technical requirement for bearing starting friction torque, and there is still a big gap in this respect. In recent years, wit...

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Problems solved by technology

[0003] At present, domestic bearing manufacturers measure the starting friction torque of bearings, mostly based on theoretical calculations or simple measurement methods using hanging weights, resulting in large errors in estimation and measurement, especially some main engine manufacturers require bearing starting friction Accurate technical parameters,

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