基于热网络法的行星减速器热分析

发布时间：2018-06-11 22:41

本文选题：行星减速器 + 摩擦生热　；参考：《南京航空航天大学》2011年硕士论文

【摘要】：行星减速器采用动轴线传动,合理应用内、外啮合,多个行星轮同时承受载荷,因此与普通齿轮减速器相比,在传动性能上具有较大优势,在很多场合被用来代替定轴减速器作为增速、减速等装置。然而,由于行星减速器结构紧凑,散热面积小,因此其传动的可靠性和效率会受到较大影响,所以,研究行星减速器工作过程中的温度场分布及变化在其传动设计中越来越重要。本论文主要完成以下几个方面的工作:对行星减速器中齿轮、轴承的相对运动及受力情况进行详细分析,给出各齿轮啮合点所受到的载荷及运动速度的计算公式,同时给出滚动轴承滚动体的接触载荷及滚动体与套圈的相对运动速度,用作研究减速器内热源分析的基础;通过对行星减速器内摩擦副的研究,根据摩擦功率损失原理建立摩擦副热源的热流功率模型,比较各方法的优劣性,确定各自的适用场合。建立高速旋转零件的风阻损失模型、搅油损失模型及联轴器的生热模型;根据传热学原理建立零件表面对流换热系数的计算模型,包括齿轮表面和油气混合物的对流换热系数,轴承内外圈及滚动体与润滑油或油气混合物的对流换热系数等;在此基础上,分析行星减速器内部零件之间的传热关系,建立减速器系统热流传递的网络模型,并用MATLAB语言编制交互式程序界面以及热网络求解程序,给出减速器稳态以及瞬态温度的分布变化规律;搭建行星减速器传动平台,通过对减速器实际工作中的温度数据采集实验,测量关键节点的温度,经与计算结果比较,发现两者结果一致,证明了理论分析方法的合理性以及计算模型的正确性。
[Abstract]:The planetary reducer adopts the moving axis transmission, reasonably applies the internal and external meshing, and many planetary gears bear the load simultaneously. Therefore, compared with the common gear reducer, the planetary reducer has a great advantage in the transmission performance. In many cases is used to replace the fixed-axis reducer as a speed-up, deceleration and other devices. However, because of the compact structure and small heat dissipation area of the planetary reducer, the reliability and efficiency of its transmission will be greatly affected. It is more and more important to study the distribution and change of temperature field in the working process of planetary reducer. The relative motion and force of the bearing are analyzed in detail, and the calculation formulas of the load and velocity of the gear meshing point are given. At the same time, the contact load of the rolling body of the rolling bearing and the relative velocity of the rolling body and the ring are given. It is used as the basis for the analysis of the internal heat source of the reducer, and through the study of the internal friction pair of the planetary reducer, the heat flux power model of the heat source of the friction pair is established according to the principle of friction power loss, the advantages and disadvantages of each method are compared, and their respective applicable situations are determined. The wind drag loss model, oil stirring loss model and heat generation model of coupling for high speed rotating parts are established, and the calculation model of convection heat transfer coefficient on the surface of parts, including the convection heat transfer coefficient of gear surface and oil and gas mixture, is established according to the heat transfer principle. Based on the analysis of the heat transfer relationship between the inner parts of the planetary reducer and the inner parts of the planetary reducer, a network model of the heat flux transfer of the reducer system is established, and the heat transfer coefficient between the inner ring of the bearing and the rolling body and the lubricating oil or oil / gas mixture is analyzed. The interactive program interface and thermal network solution program are compiled with MATLAB language, the steady and transient temperature distribution of reducer is given, and the transmission platform of planetary reducer is built. The temperature of the key nodes is measured through the temperature data acquisition experiment in the actual work of the reducer. The comparison with the calculated results shows that the two results are in agreement with each other, which proves the rationality of the theoretical analysis method and the correctness of the calculation model.
【学位授予单位】：南京航空航天大学
【学位级别】：硕士
【学位授予年份】：2011
【分类号】：TH132.46

【引证文献】