Method for analyzing vibration characteristics of bearing retainer based on finite elements

A technology of bearing cage and analysis method, applied in the field of vibration characteristic analysis of bearing cage based on finite element, can solve the stress of cage vibration circumferential direction, the fracture of aero-engine bearing cage, and the automatic analysis program without vibration characteristics And other issues

Inactive Publication Date: 2015-01-07
AVIC HARBIN BEARING
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Problems solved by technology

[0002] In recent years, studies have found that the structural resonance of the cage caused by the external excitation force is the main reason for the fracture of the bearing cage of the aero-engine. When the cage is working, the large internal stress load mainly comes from the gap between the rolling elements and the cage. The effect of collision, friction and centrifugal stress causes the cage to vibrate and produce circumferential stress. In the bearing design process, there is no automatic analysis program for the vibration characteristics of the bearing cage.

Method used

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  • Method for analyzing vibration characteristics of bearing retainer based on finite elements
  • Method for analyzing vibration characteristics of bearing retainer based on finite elements
  • Method for analyzing vibration characteristics of bearing retainer based on finite elements

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specific Embodiment approach 1

[0021] Specific Embodiment 1: A method for analyzing the vibration characteristics of a bearing cage based on finite elements in this embodiment is specifically prepared according to the following steps:

[0022] Step 1. Use 3D software to create a 3D model of the bearing cage based on the structural parameter information of the bearing cage. Figure 3(a) ~ Figure 3(b) shown, and use the format recognizable by the finite element software to store it in the working directory set by the finite element software, that is, the location specified by the computer; among them, the design of the bearing cage is a part of the bearing design, and the bearing structure is based on the used speed, The structural parameters of the cage include inner diameter, outer diameter, width, pocket diameter, number of pockets and number of lightening holes determined by the load, installation position and service temperature; the structural parameters and material performance parameters directly affec...

specific Embodiment approach 2

[0029] Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step one, using three-dimensional software to create a three-dimensional model of the bearing cage according to the structural parameter information of the bearing cage is to use CAD three-dimensional design software (Solidwork, Ug, Catia , Inventer, etc.) established. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0030] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the finite element software in step 1 is a calculation method commonly used in engineering at present. Engineering technical problems; theoretically speaking, that is, the process of idealizing a continuum with infinite degrees of freedom into a unit body assembly with only a limited number of degrees of freedom, and using structural analysis methods to find its numerical solution; the current finite element software includes ANSYS , ABQUES, and PERMAS. The APDL language in the ANSYS software is used here to import the three-dimensional graphics into the finite element software through programming, set the material properties of the bearing cage, select the solid unit, and divide the grid. Using the APDL language in the ANSYS software Command streams written in languages ​​such as Figure 4 As shown, the finite element mesh model divided by solid elements is as follows Figure 5 shown. ...

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Abstract

The invention relates to a method for analyzing the vibration characteristics of a bearing retainer based on finite elements and aims at solving the problem that no automatic analysis procedure for the vibration characteristics of the bearing retainer is developed at present to prevent the frequency range of resonance of the bearing retainer of an aero-engine. The method is implemented through a step 1 of creating the three-dimensional model of the bearing retainer and saving the three-dimensional model under the working directory set by finite element software, a step 2 of establishing a finite element model and applying the rotating speed of the bearing to the finite element model for performing statics analysis and modal analysis, a step 3 of obtaining the stress and the strain as well as the inherent frequency and the corresponding formation thereof under the action of the rotating speed of the bearing, a step 4 of determining whether the stress and the deformation of the bearing retainer under the action of the centrifugal force meet the design requirements, and the like. The method for analyzing the vibration characteristics of the bearing retainer based on the finite elements is applied to the field of the vibration characteristics of the bearing retainers.

Description

technical field [0001] The invention relates to a vibration characteristic analysis method of a bearing cage based on finite element. Background technique [0002] In recent years, studies have found that the structural resonance of the cage caused by the external excitation force is the main reason for the fracture of the bearing cage of the aero-engine. When the cage is working, the large internal stress load mainly comes from the gap between the rolling elements and the cage. The effect of collision, friction and centrifugal stress causes the cage to vibrate and produce circumferential stress. In the bearing design process, there is no automatic analysis program for the vibration characteristics of the bearing cage. Contents of the invention [0003] The purpose of the present invention is to solve the problem that there is no automatic analysis program for the vibration characteristics of the bearing cage so as to prevent the resonance frequency range of the bearing ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 公平张静静马芳董金龙李海涛翁世席任天翔郑艳华张瑞生韩东海
Owner AVIC HARBIN BEARING
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