高分子齿轮寿命预测及其疲劳磨损试验装置设计

发布时间：2018-04-23 20:14

本文选题：高分子齿轮 + 磨损曲线　；参考：《济南大学》2016年硕士论文

【摘要】：随着高分子材料的迅速发展,高分子齿轮在机械性能、力学性能方面有了很大提高,推动高分子齿轮从传递运动向传递动力领域发展。由于在高速、重载时高分子齿轮温升较快,当超过材料的临界温度时,齿轮极易软化、磨损严重,最终磨损失效,因此预测高分子齿轮的寿命对齿轮发展有重要意义。目前,高分子齿轮设计以金属齿轮参数作为设计依据,这些参数是从金属齿轮试验中得出,这与高分子齿轮实际工况不同存在较大误差。为此开发设计高分子齿轮疲劳磨损试验装置,以便于高分子齿轮动力传输和失效机理的分析,以及研究齿轮设计参数,为高分子齿轮设计制造提供理论依据和试验数据。本文通过高分子齿轮的摩擦磨损原理,研究出适用于高分子齿轮的寿命预测方法。分析高分子齿轮失效形式、磨损规律及磨损机理,建立高分子齿轮摩擦学、动力学耦合模型,基于该模型分析高分子齿轮受力情况。根据Archard磨损计算模型建立高分子齿轮磨损率与转数的数学模型,利用最小二乘法拟合出高分子齿轮磨损曲线,研究高分子齿轮疲劳磨损试验装置工作原理。通过有限元软件对高分子齿轮进行应力分析,得出齿轮啮合最大应力及最大应力出现位置,利用力学公式计算得到齿轮能承受的最大扭矩32N?m,即高分子齿轮疲劳磨损试验装置加载最大扭矩为30N?m。根据高分子齿轮疲劳磨损试验装置的设计要求得出试验装置的设计思路;根据该试验装置的性能指标要求确定试验装置的总体结构;根据单轴支撑原理设计柔性加载系统;根据封闭功率流原理设计该传动系统,并计算该封闭系统功率Ps为1.1 KW。分析高分子齿轮试验装置整体结构,总结出结构特点及该试验装置的优势。根据试验装置总体设计、布局设计制备出试验装置的本体部分;根据试验装置的工作原理制定了试验步骤。
[Abstract]:With the rapid development of polymer materials, the mechanical and mechanical properties of polymer gears have been greatly improved, which promotes the development of polymer gears from the transfer of motion to the transfer of power. Due to the high speed and heavy load, the temperature rise of polymer gears is faster. When the material temperature exceeds the critical temperature, the gears are easy to soften, wear is serious, and the final wear failure, so it is important to predict the life of polymer gears for the development of gears. At present, the design of polymer gears is based on the parameters of metal gears. These parameters are derived from the experiments of metal gears, which are different from the actual conditions of polymer gears. In order to facilitate the analysis of the dynamic transmission and failure mechanism of polymer gears, and to study the design parameters of the gears, the fatigue wear test device of polymer gears is developed, which provides the theoretical basis and experimental data for the design and manufacture of polymer gears. Based on the principle of friction and wear of polymer gears, a method for predicting the life of polymer gears is developed in this paper. The failure form, wear law and wear mechanism of polymer gear are analyzed, and the coupling model of tribology and dynamics of polymer gear is established. Based on the model, the mechanical behavior of polymer gear is analyzed. According to the Archard wear calculation model, the mathematical model of the wear rate and rotation number of polymer gears was established. The wear curve of polymer gears was fitted by least square method, and the working principle of the fatigue wear test device for polymer gears was studied. Through the finite element analysis of polymer gear, the position of maximum stress and maximum stress in gear meshing is obtained. The maximum torque of the gear can be calculated by using the mechanical formula, that is, the maximum torque of the high molecular gear fatigue wear test device is 30 Nm. According to the design requirements of the high molecular gear fatigue wear test device, the design idea of the test device is obtained, the overall structure of the test device is determined according to the performance requirements of the test device, and the flexible loading system is designed according to the principle of uniaxial support. According to the principle of closed power flow, the transmission system is designed, and the power Ps of the closed system is calculated as 1.1 KW. The overall structure of the polymer gear test device is analyzed, and the structural characteristics and advantages of the test device are summarized. According to the overall design of the test device and the layout design, the body part of the test device is prepared, and the test steps are made according to the working principle of the test device.
【学位授予单位】：济南大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：TH132.41;TQ317

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