Antifriction bearing dynamic rigidity detector

Abstract

The invention provides an antifriction bearing dynamic rigidity detector. The antifriction bearing dynamic rigidity detector includes a motor, a rotor spindle, an antifriction bearing, a radial loading electromagnetic bearing, an axial loading electromagnetic bearing, a thrust disc, and a displacement sensor, wherein the motor drives the rotor spindle to rotate; the axial loading electromagnetic bearing applies radial load to the rotor spindle; the axial loading electromagnetic bearing applies axial load to the thrust disc; the rotor spindle and the thrust disc load the radial load and the axial load to the antifriction bearing; the displacement sensor measures the radial deflection and the axial deflection; and the motor, the rotor spindle, the antifriction bearing, the radial loading electromagnetic bearing, the axial loading electromagnetic bearing and the thrust disc are configured to be highly concentric.

Description

Technical field [0001] The present disclosure relates to a device for detecting dynamic stiffness of a rolling bearing. Background technique [0002] The dynamic stiffness of the rolling bearing characterizes the dynamic coupling relationship between the rolling bearing and the rotor. The dynamic stiffness of the rolling bearing is a function of frequency and is an inherent characteristic of the system. The dynamic stiffness of rolling bearings is very different from the static stiffness of rolling bearings. In the actual working process of the rotor, the stiffness of the rolling bearing will change with the change of the rotor speed. However, accurate analysis of the stiffness of the bearing has important theoretical significance for improving the dynamic performance of the rotor. Therefore, it is necessary to design a set of dynamic stiffness for the rolling bearing. Detection device. [0003] For the traditional mechanical loading method of measuring the stiffness of rolling b...

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Problems solved by technology

[0003] For the traditional method of mechanical loading to measure the stiffness of rolling bearings, the test device is too complicated, the loading accuracy is too rough, the testing conditions are too simple, and the dynamic stiffness of rolling bearings cannot be accurately obtained due to frictional heat generation and mechanical wear caused by mechanical contact.

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