Device and method for detecting dynamic-static rigidity of rolling bearing

Abstract

The invention relates to a device for detecting the dynamic-static rigidity of a rolling bearing. The device comprises a rotating motor, center shaft head displacement sensors I and II, a to-be-detected rolling bearing displacement sensor, center shaft tail displacement sensors I and II, a flexible coupler, a center shaft, a supporting bearing seat, a to-be-detected bearing, a pressure sensor, a jack and a variable frequency vibrator. The rotating motor is connected with the central shaft; two displacement sensors are respectively mounted above and below two ends of the central shaft; a to-be-detected bearing is fixedly installed in the middle of the center shaft, the to-be-detected rolling bearing displacement sensor is arranged at the lower end of the to-be-detected bearing, the jack and the variable-frequency vibrator provide a load with vibration frequency for the to-be-detected bearing, and the pressure sensor is used for detecting the size of the load. According to the detection device, the dynamic stiffness and the static stiffness of the rolling bearing are measured under the same device, the influence of the load frequency and the rotating frequency of the bearing is fully considered, and the measurement of the dynamic stiffness of the bearing is more accurate.

Description

technical field [0001] The invention relates to the technical field of bearing quality detection, in particular to a rolling bearing dynamic-static stiffness detection device and method. Background technique [0002] Bearing is an essential part of the mechanical mechanism, it can effectively reduce the friction during the movement of the mechanical rotating body, and the stiffness of the bearing is related to the load, speed, service life and other characteristics of the bearing, so the measurement of the bearing stiffness is of great importance to the bearing Selection has played an essential reference role. At present, the measurement of bearing stiffness mainly has two different forms according to different measurement requirements. One is to measure the static stiffness of the bearing by taking the bearing to stand still and applying external pressure, and finally measuring the bearing deformation to obtain the ratio of load to bearing deformation to measure the bearing...

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Problems solved by technology

[0003] The present invention aims at measuring the static stiffness and dynamic stiffness of the bearing in the prior art, requiring two completely different experimental devices, which not only have low efficiency, time-consuming assembly and disassembly, expensive device costs, but also have large measurement errors and low precision. The problem is to provide a rolling bearing dynamic-static stiffness detection device and method, which realizes the measurement of the dynamic and static stiffness of the rolling bearing under the same device, and fully considers the influence of the load frequency and the bearing rotation frequency, so that the measurement of the dynamic stiffness of the bearing is more accurate. precise

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