Device for measuring axial and radial comprehensive dynamic stiffness of rolling bearing

Abstract

The invention discloses a device for measuring the axial and radial comprehensive dynamic stiffness of a rolling bearing and relates to the field of machining and manufacturing. The device can measurethe dynamic stiffness of different types of rolling bearings, and is accurate in measurement and easy to manufacture. The device comprises: an electric main shaft, a drive shaft, a test bearing, an axial test device, and a radial test device. The electric main shaft is connected to the drive shaft. The test bearing is mounted on the drive shaft. The axial test device tests the axial relative displacement of the inner and outer rings of the bearing. The radial test device tests the radial relative displacement of the inner and outer rings of the bearing. Then, the loading analog quantity and the deformation analog quantity of a sensor are acquired. The device solves the problem that the relative displacement of the inner and outer rings of the bearing cannot be accurately measured.

Description

technical field [0001] The invention relates to the technical field of mechanical processing and manufacturing, in particular to a measuring device for axial and radial comprehensive dynamic stiffness of rolling bearings. Background technique [0002] Stiffness is one of the important indicators to measure the dynamic characteristics of bearings. Bearing stiffness includes static stiffness against deformation under static load and dynamic stiffness against deformation under dynamic load. The currently widely used stiffness measurement method is the static stiffness measurement method, but the static stiffness cannot truly reflect the ability of the bearing to resist deformation during high-speed operation. Only the dynamic stiffness can scientifically reflect the dynamic load-carrying characteristics of the bearing. Moreover, there are few researches on the influence of the existing bearing stiffness measurement devices on the factors of elastohydrodynamic lubrication. Due...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the axial compression of the shaft and sleeve is ignored, and this method can only roughly measure the axial stiffness

The disadvantage of this method: the shaft here is a cantilever beam structure, and there will be a certain radial displacement under the force, resulting in errors in the measurement results

Disadvantages of this method: the shaft is constrained, and the mass and acceleration of the shaft alone cannot be equivalent to the force between the shaft and the inner ring; the displacement of the shaft measured by the displacement sensor cannot be equivalent to the relative displacement of the inner and outer rings of the bearing

Disadvantages of this method: there is a certain distance between the eccentric disc and the bearing, the force between the shaft and the bearing is difficult to determine, and when the main shaft rotates at a high speed, the device is unstable, and the long running time will also affect the accuracy of the shaft. Reusability and maintainability

[0009] Therefore, there is a lack of a test device for the radial and axial comprehensive dynamic stiffness of rolling bearings in the prior art, which can accurately measure the radial and axial stiffness of the rolling shaft

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