阿尔法新型传动机构设计及试验研究

发布时间：2018-12-13 00:58

【摘要】：空间站是人类开发和利用空间资源的平台,也是载人航天的重要里程碑。目前空间站阿尔法传动机构采用的是标准渐开线直齿传动方式,存在负载低速运行状态下结构振动、能源系统总重量较重、传动装置磨损影响整机寿命、传动链传动元件抗冲击和疲劳能力较弱、传动链误差自适应能力较差等问题。因此,开展阿尔法机构新型高性能传动方案研究,对于提高整机传动性能具有重要的理论意义和工程实用价值。渐开弧面齿轮传动结合了渐开线齿轮传动和圆弧齿轮传动两者的优点,既具有渐开线齿轮的中心距可分性,还具有圆弧齿轮凸凹接触强度高的优点,其接触过程为点接触,近似于纯滚动,具有良好的误差适应性。本文在渐开弧面齿轮传动研究基础上,针对阿尔法机构实际运用需求提出一种新型内啮合渐开弧面齿轮传动方案,重点开展误差分析及试验研究。本文的主要内容包括:(1)介绍了空间站阿尔法传动机构,分析了目前空间站阿尔法传动机构的缺陷,阐述了内啮合渐开弧面齿轮的推导过程,结合图例说明了内啮合渐开弧面齿轮的成形原理,分析了内啮合渐开弧面齿轮的误差补偿能力和不发生根切的条件。(2)基于阿尔法传动机构的性能指标,设计了新型传动方案,并对其中心距补偿能力、侧隙及齿面接触应力进行校核计算,结果均满足要求。通过有限元进行仿真分析,得到分析结果与理论计算一致,均表明设计的新型传动机构达到所需的性能指标。(3)根据试验的性能要求,对试验台整体结构方案进行了设计,并对试验台关键部分进行了结构分析,选取了试验各装置,使其满足试验台性能满足要求。(4)共进行了两轮1:2缩比方案误差补偿能力验证试验以及疲劳寿命试验,试验表明新型传动方案即渐开弧面齿轮具有中心距误差补偿能力,能够达到寿命所需要求。
[Abstract]:Space station is a platform for the development and utilization of space resources and an important milestone for manned space flight. At present, the Alpha transmission mechanism of the space station adopts the standard involute straight tooth transmission mode. It has structural vibration under the condition of low speed running load, the total weight of the energy system is heavy, and the wear of the transmission device affects the whole machine's life. Transmission chain transmission components have weak impact and fatigue resistance and poor adaptive ability of transmission chain error. Therefore, it is of great theoretical significance and practical value to study the new high performance transmission scheme of the alpha mechanism for improving the transmission performance of the whole machine. The involute arc gear drive combines the advantages of involute gear transmission and circular arc gear transmission. It not only has the advantages of separating the center distance of involute gear, but also has the advantage of high contact strength between convex and concave of circular arc gear. The contact process of involute gear is point contact. It is similar to pure rolling and has good error adaptability. Based on the study of involute arc gear transmission, a new type of internal meshing involute arc gear transmission scheme is proposed in this paper, which focuses on error analysis and experimental study. The main contents of this paper are as follows: (1) the paper introduces the Alpha transmission mechanism of the space station, analyzes the defects of the Alpha transmission mechanism of the space station at present, and expounds the derivation process of the internal meshing involute arc gear. The forming principle of internal meshing involute arc gear is explained with legend. The error compensation ability of internal meshing involute arc gear and the condition of no root cutting are analyzed. (2) based on the performance index of alpha drive mechanism, A new transmission scheme is designed, and its compensation ability of center distance, clearance and contact stress of tooth surface are checked and calculated, and the results meet the requirements. The simulation results obtained by finite element method are in agreement with the theoretical calculation. The results show that the new transmission mechanism has achieved the required performance index. (3) according to the performance requirements of the test, the overall structure scheme of the test bed is designed. The structure of the key parts of the test bed is analyzed, and the test devices are selected to meet the requirements of the test bench performance. (4) two rounds of error compensation tests and fatigue life tests are carried out. The test results show that the new transmission scheme, I. e., the involute arc gear, has the ability to compensate for the center distance error, and can meet the requirement of service life.
【学位授予单位】：重庆大学
【学位级别】：硕士
【学位授予年份】：2016
【分类号】：V476.1

【参考文献】