摘要
对扭矩达到40 000 N·m重载传动轴进行优化设计。针对右端输出花键根部应力过大,裂纹从花键扩散到右侧光轴,进而导致断裂的情况,提出优化方案为减少右端光轴直径,采用等强度的抛物线回转体的形式,优化原传动轴,并通过研究用函数对其加以修正,进而得出最优的抛物线回转体形式。最后,进行了优化前后传动轴的模态分析结果对比。采用这种优化方式后,传动轴右端花键应力降低了25%,在满足疲劳寿命的同时,减少了传动轴整体质量,对车辆动力性和燃油经济性也产生提升。
Optimize the design of the heavy-load transmission shaft with a torque of 40000 N·m.In view of the fact that the stress at the root of the output spline on the right end is too large,and the crack spreads from the spline to the right optical axis,which leads to fracture,an optimization scheme is proposed to reduce the diameter of the right end optical axis and optimize the original transmission shaft in the form of a parabolic slewing body of equal strength.And through research,modify it with function to get the best parabolic slewing form.Finally,the modal analysis results of the transmission shaft before and after optimization are compared.After this optimization method is adopted,the spline stress at the right end of the transmission shaft is reduced by 25%.While satisfying the fatigue life,the overall mass of the transmission shaft is reduced,and the power and fuel economy of the vehicle are also improved.
作者
王恺
Wang Kai(School of Mechanical Engineering,University of Shanghai for Science and Technology,Shanghai 200093,China)
出处
《农业装备与车辆工程》
2021年第5期95-98,111,共5页
Agricultural Equipment & Vehicle Engineering
关键词
重载传动轴
应力
右端花键
模态分析
heavy-load transmission shaft
stress
right spline
modal analysis
