Decoupling measurement method for dynamic rigidity of hydrodynamic thrust bearing

Abstract

The invention discloses a decoupling measurement method for testing the dynamic rigidity of a hydrodynamic thrust bearing. For realizing the decoupling measurement of the hydrodynamic thrust bearing of which the axial static load is implemented by hydraulic loading, the method comprises the following steps that: firstly, before performing dynamic rigidity test, a static rigidity test with simple operation and accurate measurement is performed by using an auxiliary device, and the influence of the oil film of a static pressure oil cavity and the influence of the oil film of a dynamic pressure oil cavity on the overall rigidity of the thrust bearing are obtained from static rigidity; and secondly, the dynamic rigidity test of the bearing system is performed, and the dynamic rigidity of the thrust bearing is calculated by using the rate of the influence of the dynamic pressure oil film on the overall rigidity of the thrust bearing, which is obtained in the static rigidity test.

Description

technical field [0001] The invention relates to a method for testing the dynamic stiffness of a hydrodynamic thrust bearing, in particular to a decoupling measurement method for testing the dynamic stiffness of a hydrodynamic thrust bearing using hydrostatic axial loading. Background technique [0002] Reliability concerns increase with increased emphasis on energy issues. Therefore, it is more and more important to limit and reduce the vibration of various machines. Since the dynamic characteristics of the support bearing play a major role in the vibration state of the rotor, it is very important to study the dynamic characteristics of the support bearing. Correctly predicting the coefficient of dynamic characteristics of oil film is the basis and key to study the dynamic characteristics of the rotor-sliding bearing system. [0003] As a thrust bearing that balances the thrust and fixes the axial position of the rotor, it is difficult to decouple its dynamic characteristi...

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Problems solved by technology

[0006] The purpose of the present invention is to solve the problem of testing the dynamic stiffness of a hydrodynamic thrust bearing that requires a large axial static load, especially for a specific bearing structure that meets the requirements of working conditions, that is, a hydrodynamic thrust bearing with a hydrostatic axial loading structure. Pressure thrust bearings, providing a measurement method that can decouple the characteristics of the static pressure and dynamic pressure oil film on both sides of the thrust plate

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