Axial dynamic stiffness measuring device, radial dynamic stiffness measuring device and measuring system

By introducing an adjustable axial excitation structure into the bearing measuring device, the problem that the prior art cannot accurately measure the axial dynamic stiffness of the bearing is solved, and the accurate evaluation of the dynamic characteristics of the bearing is achieved.

CN119394555APending Publication Date: 2025-02-07HENAN UNIV OF SCI & TECH
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Patent Information

Application Number
CN202411637818.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-15
Publication Date
2025-02-07

AI Technical Summary

Technical Problem

The prior art cannot apply excitation force that can be adjusted separately and can be used to the bearing, resulting in the inability to accurately measure the relationship between the axial dynamic stiffness of the bearing, the rotation speed, the excitation force magnitude and the excitation force frequency.

Method used

Axial dynamic stiffness measuring device is designed, including a frame, an axial displacement sensor, a driving structure, a translation stop clutch head and an axial excitation structure. The axial excitation structure can independently adjust the magnitude and frequency of the excitation force to separate it from the speed of the bearing.

Benefits of technology

Accurate measurement of the axial dynamic stiffness of the bearing is achieved, and the relationship between the excitation force, the excitation force frequency, the rotation speed and the axial relative displacement of the inner and outer rings can be studied.

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Abstract

The invention belongs to the field of bearing measurement, and particularly relates to an axial dynamic stiffness measuring device, a radial dynamic stiffness measuring device and a measuring system. In order to more accurately measure the relationship between the dynamic stiffness and the rotating speed, the magnitude of the exciting force and the frequency of the exciting force, the invention provides a measuring system which comprises an axial dynamic stiffness measuring device and a radial dynamic stiffness measuring device. The axial dynamic stiffness measuring device comprises a driving structure and a bearing fixing structure which are respectively fixed with an inner ring and an outer ring, and an axial excitation structure is used for applying an axial excitation force of which the size and the frequency can be independently adjusted to the bearing fixing structure. The radial dynamic stiffness measuring device comprises a radial excitation structure, and the radial excitation structure is used for applying radial excitation force of which the size and the frequency can be independently adjusted to a driving structure or a bearing fixing structure fixedly connected with the outer ring. By independently controlling the magnitude and frequency of the exciting force, the relationship between the dynamic stiffness and the rotating speed, the magnitude of the exciting force and the frequency of the exciting force can be analyzed more accurately.
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Citation Information

Patent Citations

  • A loading device integrating axial load loading and rotational load loading

    CN109855867B

  • A method and testing equipment for dynamic testing of bearing axial stiffness

    CN109855868B

  • Rolling bearing radial dynamic stiffness testing device based on piezoelectric actuator

    CN110567718B

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