Decoupling measurement method for dynamic rigidity of hydrodynamic thrust bearing

A technology of thrust bearing and hydrodynamic pressure, which is applied in mechanical bearing testing and other directions, and can solve problems such as applying dynamic stiffness testing

Inactive Publication Date: 2011-04-27
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
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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 condition

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  • Decoupling measurement method for dynamic rigidity of hydrodynamic thrust bearing
  • Decoupling measurement method for dynamic rigidity of hydrodynamic thrust bearing
  • Decoupling measurement method for dynamic rigidity of hydrodynamic thrust bearing

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Embodiment Construction

[0020] The present invention will be further described in detail below in conjunction with accompanying drawings and examples.

[0021] The design idea of ​​the present invention is as follows: since the dynamic stiffness of the oil film obtained by the thrust bearing in the dynamic stiffness test is the overall stiffness of the thrust bearing system externally, for the hydrodynamic thrust bearing specifically referred to in the present invention that adopts hydrostatic axial loading , the measured value of the dynamic stiffness must be the joint result of the oil film stiffness of the hydrostatic loading oil chamber and the oil film stiffness of the bearing dynamic pressure oil chamber. Therefore, in order to accurately measure the dynamic stiffness of the hydrodynamic thrust bearing, the inventor proposed: by replacing the dynamic pressure oil cavity of the tilting pad on the right side of the original hydrodynamic thrust bearing thrust plate with the same cavity structure as...

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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...

Claims

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Application Information

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IPC IPC(8): G01M13/04
Inventor 徐华张贝
Owner XI AN JIAOTONG UNIV
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