定日镜传动系统精度分析与实验研究

发布时间：2018-03-07 03:23

本文选题：定日镜传动系统　切入点：传动精度　出处：《重庆大学》2012年硕士论文　论文类型：学位论文

【摘要】：定日镜传动是由行星齿轮传动、新型移动基圆变厚齿轮传动副以及双环面蜗杆副组合而成的一种新型传动机构，其中，双环面蜗杆副和新型变齿厚齿轮传动副具有实现小体积、高精度、大刚度、小侧隙（侧隙可调）和大承载能力的特点，并发挥环面蜗杆传动具有大速比，高效率，长寿命，结构紧凑，运动平稳，噪声低，对上游误差有收敛作用，平均分度误差小，常用于精密圆分度机构等特点，且环面蜗杆传动随工作时间的延伸，齿面接触状态更佳。根据定日镜传动精度实验系统的功能要求，本文设计了一套以角位移传递为基础的动态测量实验系统。系统主要由伺服系统、传动系统、检测系统三部分组成，以电机内置编码器信号作为标准信号，以数显自准直仪测量信号作为输出信号，两者差值的变化反映传动系统精度的变化情况。通过理论计算与实验数据结果的对比分析，可以寻找精度变化规律，以及为误差溯源提供可靠的依据。论文针对变厚齿轮副和双蜗杆副对定日镜传动系统传动精度的影响，利用统计计算的方法进行了传动链传动精度的理论计算，并开展了系统动、静态传动精度的实验研究。论文主要做了以下工作： ①研究了定日镜传动精度实验系统的总体设计以及工作原理，介绍了伺服系统的工作原理以及控制模式的选择和实验参数的设置，分析了减速齿轮箱及系统加载装置的设计，对测试系统的选型进行了说明。 ②基于统计计算的方法，对传动系统中的变厚齿轮副和蜗轮蜗杆副传动误差与回差进行了理论计算，确定了传动误差与回差的规律特征，从理论上分析了影响传动精度的主要因素。 ③为了验证理论计算得到的结论，，开展了定日镜传动系统的传动精度实验研究。介绍了传动精度的测试方法；分析了所获得的实验测试数据；最后对理论计算结果与实验结果进行了对比分析，从而为定日镜传动系统的传动精度研究提供了参考依据。
[Abstract]:The helioscope transmission is a new type of transmission mechanism composed of planetary gear transmission, new moving base circular thickened gear transmission pair and double toroidal worm gear pair, in which the double torus worm gear pair and the new type variable tooth thick gear transmission pair have the ability to achieve small volume. The characteristics of high precision, large stiffness, small side gap (adjustable side gap) and large load carrying capacity. The toroidal worm gearing has the advantages of large speed ratio, high efficiency, long life, compact structure, steady motion, low noise, and convergent effect on upstream error. The mean indexing error is small, which is often used in precise circular indexing mechanism, and the contact state of tooth surface is better with the extension of the working time of the toroidal worm gearing. According to the functional requirements of the precision experiment system of helioscope transmission, a dynamic measuring system based on angular displacement transfer is designed in this paper. The system consists of three parts: servo system, transmission system and testing system. Taking the signal of motor built-in encoder as standard signal and measuring signal of digital display autocollimator as output signal, the variation of the difference between them reflects the change of transmission system precision. We can find the law of accuracy change and provide reliable basis for error tracing. Aiming at the influence of thickening gear pair and double worm gear pair on the transmission accuracy of the helioscope transmission system, the theoretical calculation of the transmission chain transmission accuracy is carried out by using the statistical calculation method, and the experimental study of the system dynamic and static transmission accuracy is carried out. The main work of this paper is as follows:. The main contents are as follows: 1. The general design and working principle of the precision experiment system of helioscope transmission are studied. The working principle of the servo system, the selection of control mode and the setting of experimental parameters are introduced. The design of the decelerating gear box and the loading device of the system is analyzed. The selection of test system is explained. 2 based on the statistical calculation method, the transmission error and return difference of the variable thickness gear pair and the worm gear pair in the transmission system are calculated theoretically, and the regular characteristics of the transmission error and the return error are determined. The main factors affecting transmission accuracy are analyzed theoretically. (3) in order to verify the conclusion of theoretical calculation, the transmission accuracy of helioscope transmission system is studied experimentally, the testing method of transmission accuracy is introduced, the experimental test data obtained are analyzed. Finally, the theoretical calculation results and the experimental results are compared and analyzed, which provides a reference for the study of the transmission accuracy of the helioscope transmission system.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH132.41

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