塑料斜齿轮钢制蜗杆传动强度与传动性能研究

发布时间：2018-05-26 13:36

本文选题：斜齿轮 + 蜗杆　；参考：《吉林大学》2016年硕士论文

【摘要】：斜齿轮蜗杆传动机构传动比大、传动平稳、可自锁,用来传递空间交错两轴的动力。塑料斜齿轮设计简单、易于加工、重量轻、自润滑性好、噪音小、制造成本低,广泛应用于汽车、机械、家电等领域。因此,关于塑料斜齿轮钢制蜗杆传动机构的研究,有重要的应用价值。本文以“小型乘用车自动控制离合器系统”项目为基础,项目编号为:2012GH710902,主要对塑料斜齿轮钢制蜗杆传动机构设计参数、传动效率、自锁性进行理论与试验研究,对其齿面应力进行动态有限元分析,为斜齿轮蜗杆传动机构的参数设计、材料选择、工艺选取等提供指导,具有实用价值。通过分析斜齿轮蜗杆传动输入、输出功率的方法,研究了斜齿轮蜗杆传动效率、传动条件、自锁条件,分析了压力角、螺旋角、摩擦系数对传动效率和自锁性的影响。进行了传动效率、自锁性能测试试验。研究结果表明,摩擦系数增大,传动效率降低,自锁性增强;螺旋角增大,传动效率提高,自锁性减弱;压力角增大,传动效率降低,自锁性增强。当螺旋角约为5.2°,摩擦系数约为0.09时,是斜齿轮蜗杆传动自锁的临界参考值。斜齿轮蜗杆传动设计参数对传动效率、自锁性影响的研究结果在参数设计阶段对衡量蜗杆传动机构传动效率、自锁性有指导意义。本文对某车型自动控制离合器系统塑料斜齿轮钢制蜗杆传动机构进行了动态有限元分析,研究了塑料斜齿轮啮合过程中齿面应力分布、变化情况。斜齿轮齿数为69,压力角为10.5°,螺旋角为5.16°时,斜齿轮蜗杆传动机构有三个齿为主要啮合齿,齿面最大应力变化较小;斜齿轮齿面啮合点由齿顶向齿根移动,临近齿根后又沿啮合点轨迹向齿顶方向移动较小位移,啮合点轨迹与斜齿轮端面呈一定角度;斜齿轮在靠近齿根部位接触应力较高;斜齿轮材料弹性模量越小,轮齿完成啮合的时间越长。本文的研究工作可为企业开展齿轮、蜗杆传动产品的仿真分析工作提供参考。按本文参数选择方法设计的塑料斜齿轮钢制蜗杆传动机构,已应用在企业某车型自动控制离合器系统中,在机械强度、传动性能上都能满足使用要求。本文研究的斜齿轮蜗杆传动设计参数对传动效率和自锁性的影响规律、动态接触有限元分析流程,已应用于企业蜗杆传动新产品研发中,对齿轮、蜗杆传动系列产品的开发有指导意义。
[Abstract]:The helical gear worm drive mechanism has the advantages of large transmission ratio, stable transmission and self-locking, which is used to transfer the power of space staggered two axes. Plastic helical gears are simple in design, easy to process, light in weight, good in self-lubricity, low in noise, low in manufacturing cost, and widely used in automobile, machinery, household appliances and other fields. Therefore, the study of plastic helical gear steel worm transmission mechanism has important application value. Based on the project of "automatic clutch control system for small passenger cars", the project number is: 2012GH710902. The design parameters, transmission efficiency and self-locking property of worm drive mechanism made of plastic helical gear and steel are studied theoretically and experimentally in this paper. The dynamic finite element analysis of tooth surface stress provides guidance for parameter design, material selection and process selection of helical gear worm drive mechanism. It is of practical value. By analyzing the input and output power of helical gear worm transmission, the transmission efficiency, transmission conditions and self-locking conditions of helical gear worm drive are studied. The influence of pressure angle, spiral angle and friction coefficient on transmission efficiency and self-locking property are analyzed. The transmission efficiency and self-locking performance were tested. The results show that the friction coefficient increases, the transmission efficiency decreases and the self-locking property increases; the spiral angle increases, the transmission efficiency increases and the self-locking property weakens; the pressure angle increases, the transmission efficiency decreases, and the self-locking property increases. When the helical angle is about 5.2 掳and the friction coefficient is about 0.09, it is a critical reference value for helical gear worm drive self-locking. The results of the study on the influence of the design parameters of helical gear worm drive on transmission efficiency and self-locking are of guiding significance in the stage of parameter design for measuring the transmission efficiency and self-locking of worm transmission mechanism. In this paper, the dynamic finite element analysis of the plastic helical gear steel worm drive mechanism in the automatic control clutch system of a vehicle is carried out, and the stress distribution and variation of the tooth surface during the meshing process of the plastic helical gear are studied. When the number of helical gear teeth is 69, the pressure angle is 10.5 掳, and the helical angle is 5.16 掳, the helical gear worm drive mechanism has three teeth as the main meshing teeth, the maximum stress of the tooth surface is small, and the meshing point of the helical gear tooth surface moves from the top of the tooth to the root of the tooth. Near the root of the tooth, it moves a little displacement along the trajectory of the meshing point to the top of the tooth, and the trajectory of the meshing point is at a certain angle with the end face of the helical gear, the contact stress of the helical gear near the root of the tooth is higher, the elastic modulus of the helical gear material is smaller, The longer the teeth finish meshing. The research work in this paper can provide a reference for enterprise to carry out the simulation analysis of gear and worm transmission products. The worm drive mechanism of plastic helical gear and steel which is designed according to the method of parameter selection in this paper has been applied to the automatic clutch control system of a certain vehicle in an enterprise. The mechanical strength and transmission performance can meet the requirements of application. The influence of helical gear worm drive design parameters on transmission efficiency and self-locking, dynamic contact finite element analysis flow, has been applied to the research and development of new products of worm drive in enterprise. The development of worm transmission series is of guiding significance.
【学位授予单位】：吉林大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：U463.2;TQ320.79

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