基于参数化多体动力学模型的内齿式回转支承动态优化设计OA北大核心CSTPCD
Dynamic optimization design of internal toothed toothed slewing bearing based on parametric multi-body dynamic model
内齿式回转支承兼有滚动轴承的回转支承特点和齿轮啮合传动特点,在联合载荷作用下其动态性能的影响因素众多,容易出现轮齿磨损或断齿、套圈滚道磨损和运行精度变差等问题.综合考虑钢球与内外套圈滚道、保持架兜孔的动态接触作用及内齿圈轮齿间的啮合传动作用,建立了内齿式回转支承参数化多体接触动力学模型.分析了沟道曲率半径、保持架兜孔孔径、初始接触角和轮齿变位系数等关键设计参数对回转支承齿轮啮合力、1号钢球与N1滚道的接触力、内齿圈质心轴向和径向振动位移的影响规律.在此基础上,采用试验设计(design of experiment,DOE)方法,对内齿式回转支承的关键设计参数进行全因子试验设计及计算,获得了多参数影响下回转支承的动态性能.结合线性加权法,运用统一量纲法和权系数法构造新的多目标优化函数,提出了回转支承动态性能的多变量多目标优化设计方法,得到回转支承的轮齿啮合力下降了49.27%,1号钢球与N1滚道的接触力下降了29.6%,内齿圈质心轴向振动位移减小了5.41%,内齿圈质心径向位移减小了15.88%,回转支承的性能得到了优化.研究结果为回转支承的动态设计提供了参考.
The internal toothed slewing bearing has both the slewing bearing characteristics of rolling bearing and the gear meshing transmission characteristics.Under the action of combined load,its dynamic performance is affected by many factors,and it is easy to suffer from tooth wear or broken teeth,ring raceway wear and poor running accuracy.Considering the dynamic contact between the steel ball and the inner and outer ring raceway,the cage pocket hole and the meshing transmission between the inner ring teeth,the parametric multi-body contact dynamic model of an internal toothed slewing bearing was established.The influence of key design parameters such as radius of curvature of groove,hole diameter of cage pocket,initial contact angle and tooth displacement coefficient on the gear meshing force of slewing ring,contact force between No.1 steel ball and N1 raceway,and the axial and radial vibration displacement of the center of mass of the inner ring were analyzed.On this basis,the design of experiments(DOE)method was used to design and calculate the key design parameters of the toothed slewing bearing,and the dynamic performance of slewing bearing under the influence of multiple parameters was obtained.Combined with linear weighting method,a new multi-objective optimization function was constructed and solved by using unified dimension method and weight coefficient method,and a multivariate multi-objective optimization design method for the dynamic performance of slewing bearings was proposed,which provides a reference for the dynamic design of slewing bearings.The gear meshing force of slewing ring decreased by 49.27%,the contact force between No.1 steel ball and N1 raceway decreased by 29.6%,the axial vibration displacement of the center of mass of the inner ring decreased by 5.41%,the radial vibration displacement of the center of mass of the inner ring decreased by 15.88%.The performance of the rotary bearing was optimized.The research results provide a reference for the dynamic design of slewing bearing.
曹望城;韩佳轩;姚廷强
昆明理工大学 机电工程学院,云南 昆明 650500
机械工程
回转支承多体动力学试验设计动态优化设计多目标优化
slewing bearingmulti-body dynamicsexperimental designdynamic optimization designmulti-objective optimization
《工程设计学报》 2024 (002)
168-177 / 10
国家自然科学基金资助项目(12162016)
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