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兵工学报 ›› 2018, Vol. 39 ›› Issue (6): 1239-1248.doi: 10.3969/j.issn.1000-1093.2018.06.026

• 研究简报 • 上一篇    

考虑轮辐刚度和齿廓修形的渐开线直齿轮动载荷研究

李春明1, 王成1, 杜明刚1, 赵志刚2   

  1. (1.中国北方车辆研究所 车辆传动重点实验室, 北京 100072; 2.陆军装备部 项目管理办公室, 北京 100072)
  • 收稿日期:2017-09-08 修回日期:2017-09-08 上线日期:2018-07-29
  • 作者简介:李春明(1964—),男,研究员,博士。E-mail: chmli@noveri.com.cn;
    杜明刚(1973—),男,研究员。E-mail:mgdu@noveri.com.cn
  • 基金资助:
    国家国防科技工业局基础产品创新科研项目(2018年);武器装备预先研究项目(41402050202)

Analysis of Dynamic Load of Spur Gears Considering the Gear Body Stiffness and Tooth Profile Modification

LI Chun-ming1, WANG Cheng1, DU Ming-gang1, ZHAO Zhi-gang2   

  1. (1.Science and Technology on Vehicle Transmission Laboratory, China North Vehicle Research Institute, Beijing 100072, China; 2.Project Management Office, Department of Army Equipment, Beijing 100072, China)
  • Received:2017-09-08 Revised:2017-09-08 Online:2018-07-29

摘要: 为解决高速重载车辆渐开线直齿轮功率密度低和振动载荷大问题,开展轮辐刚度和齿廓修形对齿轮动载荷影响规律研究。考虑轮辐刚度、齿廓修形和齿轮实际运动状态,结合解析法建立了齿轮啮合刚度模型,将该模型与10自由度横-扭-摆耦合非线性动力学模型进行耦合计算。结果表明:随着转速增加,齿轮动载荷均呈驼峰状变化,多数转速下薄壁轮缘齿轮动载荷较大,其中,动态啮合力第2阶和第6阶啮频对应的幅值明显增加;随着转矩增加,齿轮动载荷总体均呈抛物线减小,但薄壁轮缘齿轮存在局部峰值;随着修形量增加,齿轮动载荷均呈U形变化;存在最优修形量使动载荷达到最小,当修形量超过最优值时薄壁轮缘齿轮动载荷变化平缓;当修形量超过某临界值时修形齿轮动载荷大于无修形齿轮,且薄壁轮缘齿轮临界修形量较大;短修形齿轮动载荷总体均呈U形变化,长修形齿轮动载荷急剧减小,说明长修形可更有效地减弱齿轮振动。

关键词: 渐开线直齿轮, 啮合刚度, 齿廓修形, 动载荷

Abstract: The influences of gear bodies, input speed, torque and tip relief on dynamic load of gear pair are studied to solve the low power density and high dynamic load of spur gear for high speed heavy-duty vehicles. A gear mesh stiffness model is established for spur gear, in which the gear body stiffness, profile modification and actual motion state of gear are considered. The gear mesh stiffness model is coupled into the 10 degrees-of-freedom lateral-torsional-rocking nonlinear dynamic model of a single stage gear system. The results show that the dynamic load of gear changes in the form of hump-like shape with the increase in speed, and the change trend of dynamic load remain almost the same at many rotating speeds. While the dynamic load of light-weight gear are much larger at various speeds, especially the amplitudes corresponding to the second- and sixth-order harmonics of mesh frequency of dynamic mesh force are obviously increased. With the increase in torque, the dynamic load of gear body is reduced in the form of a parabola, while the dynamic load of light-weight gear reaches to its local maximum. With the increase in tip relief amount, the dynamic load changes in the form of “U” type, and an optimal amount of tip relief exists to make the dynamic load reach to the minimum. While the amount of tip relief exceeds the optimal value, the dynamic load of light-weight gear changes more slightly. For short length of tip relief, the dynamic load appears in the form of “U” type. For long length of tip relief, the dynamic load factor is sharply reduced, which means that the long length of tip relief can more effectively reduce the dynamic load.Key

Key words: spurgear, meshstiffness, profilemodification, dynamicload

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