Multi-physics dynamic parameter testing device for rolling bearing cage

Abstract

The invention belongs to the technical field of rolling bearing test, and particularly relates to a multi-physical field dynamic parameter test device for a rolling bearing cage. The device comprisesa rolling bearing cage dynamic parameter test device, a sensor test system, a driving device, a radial loading device, an axial loading device and a bearing box, and the experimental test of the rolling bearing cage under a certain complex load and a rotation speed can be realized. The rolling bearing cage dynamic parameter test device comprises a fiber grating sensor, a fiber grating signal transmission device, a test and compensation ring, an eddy current sensor, and a to-be-tested bearing. Multi-test point distributed synchronous test of strain and temperature of the rolling bearing cage under the condition of limited structure space can be realized, and the device is used for studying the relationship among multiple degrees of freedom, multi-point strain and temperature; by adopting the fiber grating sensor, one-line multi-point, high-sensitivity and small-size advantages are achieved; and by adopting a smooth ring and a special transmission bracket, sensor signal transmission is realized, and the impact on the cage test result can be reduced.

Description

technical field [0001] The invention belongs to the technical field of rolling bearing testing, and in particular relates to a rolling bearing cage multi-physics field dynamic parameter testing device. Background technique [0002] Rolling bearings are important basic components of major equipment, and their performance and life directly affect the working performance, reliability and safety of the equipment. Rolling bearings are usually composed of four parts: outer ring, inner ring, steel ball and cage. The cage is its core part, which evenly separates the steel balls in the circumferential direction and guides the steel balls to bear the load in turn. During the operation of the bearing, the cage has spatial movement, contact force, and frictional heat generation; and its motion, stress-strain, and temperature characteristics interact and couple with each other, and change with the speed, load, lubrication, and cage structure , the relationship is extremely complex, and...

AI Technical Summary

Problems solved by technology

Due to the structural space limitation of the cage and the difference between the rotational speed and the inner and outer rings, it is very difficult to arrange the cage test sensor arrangement and the rotation state signal transmission, resulting in the existing cage temperature test mostly being a single point, and the strain using multiple strain sensors (SKF, TIMKEN) for multi-point testing, but multi-channel electric slip ring transmission is required, resulting in large volume and mass, increasing the additional mass of the cage

In the actual process, in addition to being in contact with multiple rolling elements, the cage also has friction and contact with the guide ring. There are differences in strain and temperature between the cage and each rolling element and guide ring. Single temperature and strain test Does not reflect cage characteristics

[0004] Therefore, the current test methods for rolling bearing cages are mostly independent tests of parameters such as individual motion, strain, or temperature, which cannot realize the simultaneous testing of multiple physical field parameters of the cage, and it is difficult to obtain synchronous data of multi-degree-of-freedom motion, multi-point strain, and temperature. As a result, the relationship between cage motion, strain, and temperature under complex motion conditions is unclear. Therefore, there is an urgent need for a simultaneous testing method and experimental device that can realize the multi-degree-of-freedom motion of the bearing cage, multi-point strain, and temperature multi-physical field dynamic parameters.

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