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Aero-engine main spindle bearing rated life calculation method considering backlash change

A technology for aero-engine and main shaft bearings, applied in the field of aviation components, can solve the problems of inaccurate calculation of bearing working life and other problems

Inactive Publication Date: 2019-10-18
UNIV OF ELECTRONIC SCI & TECH OF CHINA
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  • Abstract
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  • Application Information

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Problems solved by technology

[0004] In view of the above-mentioned deficiencies in the prior art, the method for calculating the rated life of the main shaft bearing of the aero-engine considering the change of the clearance provided by the present invention solves the problem of inaccurate calculation of the actual working life of the bearing

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  • Aero-engine main spindle bearing rated life calculation method considering backlash change
  • Aero-engine main spindle bearing rated life calculation method considering backlash change
  • Aero-engine main spindle bearing rated life calculation method considering backlash change

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Embodiment Construction

[0085] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0086] A specific embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0087] Such as figure 1 As shown, in one embodiment of the present invention, a method for calculating the rating life of an aero-engine main shaft bearing considering clearance changes includes the following steps:

[0088] S1. Analyze the influence of interference fit, operating tempera...

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Abstract

The invention discloses an aero-engine spindle bearing rated life calculation method considering backlash change, which comprises the following steps: analyzing the influence of interference fit, working temperature and rotating speed on a working backlash, and obtaining the working backlash by establishing a radial working backlash calculation equation of an aero-engine spindle bearing; based ona Hertz elastic contact theory, carrying out load distribution analysis of the main shaft bearing through a working clearance, and establishing a load distribution model; analyzing the motion states of the spindle bearing inner ring, the main shaft bearing outer ring and the rolling body to obtain a motion model of the main shaft bearing; and correcting the L-P fatigue life model through the loaddistribution model and the motion model, and calculating the rated life of the aero-engine main shaft bearing.. The method enables the prediction of the rated life of the aero-engine main shaft bearing to be more accurate.

Description

technical field [0001] The invention belongs to the field of aviation components, and in particular relates to a method for calculating the rated life of a main shaft bearing of an aero-engine considering clearance changes. Background technique [0002] Aeroengine main shaft bearings are key components of aeroengines, which usually operate under high speed, high temperature and complex load conditions, which have a direct impact on the quality, performance, life and reliability of aeroengines. Traditional studies on the life prediction of aeroengine main shaft bearings usually do not consider the effect of clearance variation. However, this kind of neglect is untenable in actual operation, because the clearance is an important parameter of rolling bearings, and the size of the working clearance will directly affect the load distribution, vibration, noise, friction torque and life in the bearing. It is very necessary to predict the life of aeroengine main shaft bearings unde...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/15G06F30/17G06F2119/06
Inventor 黄洪钟余奥迪黄土地李贺李彦锋曾颖柏松
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
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