Planetary gearbox sun gear gradient pitting corrosion time-varying meshing stiffness analysis method

A time-varying mesh stiffness, planetary gearbox technology, applied in the field of dynamic modeling and signal analysis, can solve problems such as increased impact, increased tooth surface erosion, difficult to distinguish, etc., to achieve the effect of improving accuracy

Inactive Publication Date: 2018-02-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

However, most studies on pitting corrosion focus on the analysis of pitting vibration signals, and there are still few studies on the vibration mechanism of gear tooth pitting corrosion faults; The situation is quite different from the gradual change characteristics of pitt

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  • Planetary gearbox sun gear gradient pitting corrosion time-varying meshing stiffness analysis method
  • Planetary gearbox sun gear gradient pitting corrosion time-varying meshing stiffness analysis method
  • Planetary gearbox sun gear gradient pitting corrosion time-varying meshing stiffness analysis method

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Embodiment Construction

[0064] In order to facilitate those skilled in the art to understand the technical content of the present invention, the content of the present invention will be further explained below in conjunction with the accompanying drawings.

[0065] Such as figure 2 Shown is the scheme flow chart of the present invention, the technical scheme of the present invention is: planetary gear box sun gear gradual change pitting time-varying meshing stiffness analysis method, comprises the following steps:

[0066] S1. Judgment of pitting degree: According to the running time of the planetary gearbox, the tooth surface pitting is divided into two stages: early pitting and extended pitting.

[0067] In the early stage of pitting, the pits or small fatigue pits on the tooth surface occur at the root of the tooth near the pitch line; when they continue to expand, the fatigue pits along the contact line increase and the number increases, and Interconnected to form denudation scars and change th...

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Abstract

The present invention discloses a planetary gearbox sun gear gradient pitting corrosion time-varying meshing stiffness analysis method and belongs to the dynamic modeling and signal analysis field. According to the planetary gearbox sun gear gradient pitting corrosion time-varying meshing stiffness analysis method, with an easily-damaged sun gear in a planetary gearbox adopted as an object, the pitting corrosion of the sun gear is divided into an early pitting stage and an extended pitting stage according to gradient pitting corrosion on the teeth of the sun gear; a calculation method of the time-varying meshing stiffness of the sun gear during a pitting fault is inferred on the basis of a potential energy law and according to the stress and deformation of the gear caused by pitting of different levels; and on the basis of the calculation method, the dynamic characteristic and vibration response of gradient pitting corrosion can be precisely analyzed. The method of the present invention can be applied to the dynamics research of other gearboxes of which the structures are similar to that of the sun gear.

Description

technical field [0001] The invention belongs to the field of dynamic modeling and signal analysis, in particular to a method for analyzing the meshing stiffness with gradual pitting and time-varying meshing stiffness of the sun gear of a planetary gearbox. Background technique [0002] Planetary gearboxes have been widely used in mechanical transmission systems in industries such as aerospace, ships, wind power, and manufacturing because of their small size, large load-carrying capacity, and stable operation. Due to factors such as harsh working environment and high load, the key components such as the sun gear and planetary gear are easily damaged, thus affecting the safety and reliability of the entire system. During the transmission process, the time-varying meshing stiffness is one of the main excitation sources for the vibration response of the gear transmission system. Especially when the gear is faulty, the meshing stiffness decreases, causing greater noise and vibrat...

Claims

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Application Information

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IPC IPC(8): G01M5/00G01M13/02
CPCG01M5/0033G01M5/005G01M5/0066G01M13/021G01M13/027G01M13/028
Inventor 郭伟程鹏肖宁聪
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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