锥—行星立磨减速机非线性振动特性研究

发布时间：2018-05-22 15:09

本文选题：立磨减速机 + 非线性振动　；参考：《重庆大学》2011年硕士论文

【摘要】：立磨减速机是大型立式磨机的核心部件,其齿轮传动系统通常由锥齿轮传动、平行轴齿轮传动、行星齿轮传动等多种传动形式组成。由于立磨减速机传动形式的复杂性,在运转过程中各级齿轮副所产生的内部激励以及外部激励相互耦合作用,使整个装置的振动特性非常复杂。因此,开展立磨减速机齿轮传动系统的动力学研究,对解决其减振降噪问题具有重要理论意义和工程应用价值。论文课题来源于国家科技支撑计划项目。综合应用齿轮啮合原理、非线性振动理论以及动力接触有限元仿真方法,对锥-行星立磨减速机非线性振动特性进行研究。本文的主要研究工作如下: ①采用集中参数法建立了考虑多对齿轮副时变啮合刚度、啮合阻尼、轮齿综合误差、齿侧间隙和外部激励的立磨减速机齿轮传动系统17自由度非线性动力学模型,并推导了模型的量纲一化方程。 ②利用4-5阶变步长Runge-Kutta数值积分方法对量纲一化微分方程组进行数值仿真。基于非线性振动理论,分析其时间历程曲线、频谱图、相轨迹、庞加莱截面、分岔图,研究了系统参数对非线性动力学特性的影响规律。 ③采用ANSYS/LS-DYNA软件,对弧齿锥齿轮进行动力接触有限元分析,得出不同啮合位置轮齿的啮合刚度、啮合冲击及动态应力,并将刚度激励、误差激励和冲击激励合成为齿轮副内部动态激励。 ④借助ANSYS的瞬态响应有限元分析模块,采用直接积分法计算立磨减速机的动态响应,并将APDL语言编程提取的节点动态响应进行数值特征分析。分析表明,有限元法与集中参数法计算结果吻合良好。
[Abstract]:Vertical mill reducer is the core part of large vertical mill. Its gear transmission system is usually composed of bevel gear drive, parallel shaft gear transmission, planetary gear transmission and so on. Due to the complexity of the transmission form of vertical mill reducer, the internal and external excitations produced by gear pairs at all levels are coupled in the process of operation, which makes the vibration characteristics of the whole device very complex. Therefore, the research on the dynamics of gear transmission system of vertical mill reducer has important theoretical significance and engineering application value to solve the problem of vibration and noise reduction. The thesis comes from the National Science and Technology support Program. Based on gear meshing principle, nonlinear vibration theory and finite element simulation method of dynamic contact, the nonlinear vibration characteristics of bevel and planetary vertical mill reducer are studied. The main work of this paper is as follows: In this paper, a 17 DOF nonlinear dynamic model of gear transmission system of vertical mill reducer is established by means of the lumped parameter method, which takes into account the time-varying meshing stiffness, meshing damping, gear tooth synthesis error, tooth side clearance and external excitation of several pairs of gear pairs. The dimensionalization equation of the model is derived. 2 numerical simulation of dimensionally homogeneous differential equations is carried out by using 4-5 order variable step Runge-Kutta numerical integration method. Based on the theory of nonlinear vibration, the time history curve, spectrum diagram, phase locus, Poincare cross section and bifurcation diagram are analyzed, and the influence of system parameters on nonlinear dynamic characteristics is studied. Using ANSYS/LS-DYNA software, the dynamic contact finite element analysis of spiral bevel gear is carried out, and the meshing stiffness, meshing impact and dynamic stress of gear teeth with different meshing positions are obtained, and the stiffness is excited. The combination of error excitation and shock excitation is internal dynamic excitation of gear pair. With the help of the transient response finite element analysis module of ANSYS, the direct integration method is used to calculate the dynamic response of the vertical mill reducer, and the node dynamic response extracted by APDL language is analyzed. The analysis shows that the finite element method is in good agreement with the lumped parameter method.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH132.46

【引证文献】