Journal of Jilin University(Engineering and Technology Edition) ›› 2020, Vol. 50 ›› Issue (2): 483-493.doi: 10.13229/j.cnki.jdxbgxb20181080

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Analysis of nonlinear dynamic characteristic of elliptic gear transmission system

Chang-bin DONG(),Yong-ping LIU,Yong-qiao WEI,Hai-qing DENG,Jie Xu   

  1. School of Mechanical & Electronical Engineering, Lanzhou University of Technology, Lanzhou 730050, China
  • Received:2018-10-25 Online:2020-03-01 Published:2020-03-08

Abstract:

In order to obtain the vibration law of elliptic gear pair and realize its stable and efficient transmission, the nonlinear dynamic characteristics of elliptic gear were studied based on the analysis of the inherent characteristics of elliptic gear. Based on the theory of gear dynamics, a nonlinear dynamic model of elliptic gear with time-varying meshing stiffness, backlash, static transmission error and viscoelastic damping is established. The nonlinear dynamic equation of elliptic gear transmission system is solved by the fourth-order variable step Runge-Kutta numerical method, and the displacement response, phase trajectory and Poincaré mapping of the system are plotted. The effects of excitation frequency, damping ratio, time-varying mesh stiffness, and internal excitation parameters on the dynamic response of the transmission system are obtained. The establishment, solution and parameter analysis of dynamic model of elliptic gear pair can provide a theoretical basis for subsequent dynamic design, vibration response trend prediction and noise reduction under different parameters.

Key words: machinery manufacturing automation, elliptic gear, dynamic characteristics, nonlinear response

CLC Number: 

  • TH132.424

Fig.1

Reversing device of planetary gear train with non-circular gears"

Table 1

Elliptic gear design parameters"

参数数值
模数m3
齿数Z47
中心距a/mm150
齿顶高系数ha*1
顶隙系数C*0.25
齿宽B/mm30
偏心率e0.3287
节曲线方程rr=64.6671±0.3287cosφ

Fig.2

Inherent characteristics of elliptic gears"

Fig.3

Elliptic gear pair model with single degree of freedom"

Fig.4

Influence of excitation frequency on dynamic characteristics of system"

Fig.5

Influence of damping on dynamic characteristics of system"

Fig.6

Influence of time varying meshing stiffness on dynamic characteristics of system"

Fig.7

Influence of internal excitation on dynamic characteristics of system"

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