轮边减速器齿轮传动参数优化设计及其齿顶修形研究

发布时间：2018-05-30 21:21

本文选题：轮边减速器 + 优化设计　；参考：《湖南科技大学》2011年硕士论文

【摘要】：随着我国煤炭、铁矿石等矿产资源开采行业的高速发展,我国对先进矿山开采运输设备的需求也越来越大,矿用电动轮自卸车就是其中的代表性产品。轮边减速器作为矿用电动轮自卸车的核心部件,要求其结构紧凑、重量轻、运行平稳,因此对轮边减速器齿轮传动系统参数进行优化设计并改善其力学特性,对于提高矿用电动轮自卸车的运行性能具有重要意义。该文以某公司矿用电动轮自卸车轮边减速器为研究对象,从齿轮传动参数优化设计建模、优化模型求解方法、轮齿动态载荷分析、齿顶修形参数优化四个方面对轮边减速器进行了理论分析与数值仿真。主要研究工作如下: (1)轮边减速器齿轮传动参数优化建模。根据轮边减速器的设计要求和实际加工条件,建立以模数、齿数、变位系数、工作齿宽为设计变量,以配齿约束、基本设计变量约束、传动性能约束、齿轮强度约束、齿顶厚度及其它约束为设计约束条件,以齿轮传动系统总质量最小为设计目标的单目标优化设计数学模型。 (2)优化模型求解方法及轮边减速器优化设计。针对轮边减速器优化设计模型中离散变量与连续变量共同存在的特点,提出可行枚举法与遗传算法相结合的求解方法。通过运用MATLAB编程计算得到相应的优化参数值和目标函数值,获得轮边减速器齿轮传动参数的优化设计方案。 (3)齿轮多体动力学仿真及其轮齿动载系数分析。基于多体动力学仿真软件ADAMS,建立轮边减速器齿轮传动系统中心轮和大星轮啮合轮齿动态载荷仿真模型。通过仿真获得了轮齿的动态载荷时间历程及其动载系数,与理论分析基本吻合,为齿轮齿顶修形提供了理论分析基础。 (4)齿轮齿顶修形参数优化。运用试验设计方法,建立齿轮齿顶修形量与动载系数之间的二阶响应面模型。以动载系数最小为优化目标,获得最优齿顶修形量。与未修形时相比,改善了齿轮传动的轮齿动态载荷特性。该文通过建立轮边减速器齿轮传动参数优化模型,对轮边减速器进行了优化设计;通过齿轮多体动力学仿真和齿轮齿顶修形量优化设计,改善了轮边减速器轮齿动态载荷特性。为轮边减速器齿轮传动系统参数优化和齿顶修形量优化提供了理论依据和实践参考。
[Abstract]:With the rapid development of mining industry of coal, iron ore and other mineral resources in China, the demand for advanced mining and transportation equipment in China is increasing, and the electric wheel dump truck is one of the representative products. The wheel side reducer, as the core component of the mine electric wheel dump truck, requires its compact structure, light weight and smooth operation. Therefore, the parameters of the gear transmission system of the wheel side reducer are optimized and its mechanical properties are improved. It is of great significance to improve the performance of mine electric wheel dump truck. This paper takes the wheel side reducer of a mine electric wheel dump truck as the research object, modeling the gear transmission parameter optimization design, solving the optimization model, and analyzing the dynamic load of the gear tooth. Theoretical analysis and numerical simulation of gear side reducer are carried out in four aspects of tooth top modification parameter optimization. The main work of the study is as follows: Model optimization of gear transmission parameters of wheel side reducer. According to the design requirements of the wheel side reducer and the actual processing conditions, the design variables such as modulus, tooth number, modification coefficient and working tooth width are established, and the gear matching constraints, basic design variables constraints, transmission performance constraints, gear strength constraints are established. The tooth top thickness and other constraints are the design constraints, and the mathematical model of single objective optimization design takes the minimum total mass of the gear transmission system as the design objective. 2) the method of solving the optimization model and the optimal design of the wheel side reducer. In view of the co-existence of discrete and continuous variables in the optimal design model of wheel reducer, a feasible enumeration method combined with genetic algorithm is proposed. The optimal design scheme of gear transmission parameters of wheel reducer is obtained by using MATLAB programming to calculate the corresponding optimization parameters and objective function values. Simulation of gear multi-body dynamics and analysis of gear tooth dynamic load coefficient. Based on the multi-body dynamics simulation software Adams, the dynamic load simulation model of the meshing gear teeth of the center wheel and the large star wheel in the gear drive system of the wheel side reducer is established. The dynamic load time history and the dynamic load coefficient of the gear teeth are obtained by simulation, which are in good agreement with the theoretical analysis, and provide the theoretical analysis basis for the gear tooth top modification. Gear top modification parameter optimization. The second order response surface model between gear top modification and dynamic load coefficient is established by means of experimental design method. With the minimum dynamic load coefficient as the optimization objective, the optimal tooth top modification is obtained. Compared with the unmodified shape, the dynamic load characteristics of gear drive are improved. In this paper, the optimal design of the gear reducer is carried out by establishing the gear transmission parameter optimization model of the gear side reducer, and the dynamic load characteristics of the gear tooth is improved by means of the multi-body dynamics simulation of the gear and the optimum design of the gear top profile modification. The theoretical basis and practical reference are provided for the optimization of gear transmission system parameters and tooth top profile modification of wheel reducer.
【学位授予单位】：湖南科技大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH132.41

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