多级行星传动构型与效率分析及在轮边减速器中的应用

发布时间：2018-02-21 23:37

本文关键词： 多级行星传动构型分析传动效率轮边减速器　出处：《湘潭大学》2013年硕士论文　论文类型：学位论文

【摘要】：多级行星齿轮传动作为经典的机械传动形式，应用在众多工业领域。现代机械装备对多级行星传动机构提出了更高的要求，高效率的传动类型、多样化的传动装置成为追求的目标。构型分析是机构创新设计的重要手段，本文将图论-邻接矩阵法应用于多级行星齿轮传动机构的构型分析，以NGW型两级行星齿轮机构为研究对象，总共得到了60种机构构型。根据手册对效率与传动比关系的定义完善了行星齿轮传动系统效率计算的方法，重点分析了传动机构、输入输出构件、传动比以及传动比分配对传动效率的影响，并绘制出了各种情况下的传动比与效率的关系曲线图，，可指导于工程中多级行星传动系统的设计。最后，本文以22吨液压挖掘机轮边减速器为设计实例，验证本课题研究的意义。本文主要工作如下：结合了基本的图论法与邻接矩阵法，将多级行星齿轮传动机构转化为数学表达形式，并且有效地对运动链进行了同构判断。以NGW型两级行星齿轮传动机构为研究对象，分析了其构型综合。列举了所有构型结果，其中包含了24种串联型两级行星齿轮机构和36种封闭差动式两级行星齿轮机构。通过该方法推导可以得到完整的NGW型行星齿轮传动机构的各种构型，可为多级行星齿轮传动创新设计提供新的方法。整理和总结了可以应用于所得到的串联型行星齿轮传动机构的传动效率计算的啮合功率法。完善两级差动封闭式行星轮系的效率计算方法，具体计算了相同传动比条件下，所有差动封闭行星机构的传动效率大小，优选出传动效率高且结构紧凑的行星传动构型。分析了输入、输出构件和传动比对传动效率的影响，发现在合适的传动比区间内，输入输出机构对于传动效率的影响更大。最后重点探讨了行星机构各级间的传动比分配对传动效率的影响，总结出多级行星齿轮传动机构传动比分配方法——“高速级应略大于低速级”。给出了各类型传动机构传动比分配与效率的关系曲线图，作为设计该种行星轮系时分配传动比的参考。将上述分析应用于液压挖机轮边减速器设计，该减速器采用NGW型两级差动封闭行星传动机构，通过分析现有产品效率，传动比重新分配以获得更高的传动效率。通过机构动力学仿真，计算了轮边减速器的效率，证明多级行星传动机构构型分析和效率计算的设计方法在工程实际应用中是实用的。
[Abstract]:As a classical mechanical transmission, multistage planetary gear transmission is applied in many industrial fields. Configuration analysis is an important means of mechanism innovation design. In this paper, graph theory-adjacency matrix method is applied to the configuration analysis of multistage planetary gear transmission mechanism. Taking the NGW type two-stage planetary gear mechanism as the research object, 60 kinds of mechanism configurations are obtained. According to the definition of the relationship between efficiency and transmission ratio in the manual, the method of calculating the efficiency of planetary gear transmission system is improved, and the transmission mechanism is emphatically analyzed. The effects of input and output components, transmission ratio and transmission ratio distribution on transmission efficiency are also drawn. The curves of the relationship between transmission ratio and efficiency are drawn, which can be used to guide the design of multi-stage planetary transmission system in engineering. This paper takes the wheel side reducer of 22 ton hydraulic excavator as an example to verify the significance of the research. The main work of this paper is as follows:. Combining the basic graph theory method with the adjacency matrix method, the multistage planetary gear transmission mechanism is transformed into the mathematical expression form, and the kinematic chain is effectively judged. Taking the NGW type two-stage planetary gear transmission mechanism as the research object, The configuration synthesis is analyzed. All the configuration results are listed. There are 24 kinds of series type two stage planetary gear mechanism and 36 kinds of closed differential two stage planetary gear mechanism. By this method, we can get the complete configuration of NGW type planetary gear transmission mechanism. It can provide a new method for the innovative design of multistage planetary gear transmission. The meshing power method, which can be used to calculate the transmission efficiency of the series planetary gear transmission mechanism, is arranged and summarized. The efficiency calculation method of the two-stage differential closed planetary gear train is improved, and the calculation of the efficiency of the two stage differential closed planetary gear train is concretely calculated under the condition of the same transmission ratio. The transmission efficiency of all differential closed planetary mechanism is large, and the planetary transmission configuration with high transmission efficiency and compact structure is selected. The effects of input, output components and transmission ratio on transmission efficiency are analyzed, and it is found that the transmission efficiency is in the appropriate transmission ratio range. The input-output mechanism has a greater influence on the transmission efficiency. Finally, the effect of the transmission ratio distribution among the planetary mechanisms on the transmission efficiency is discussed. This paper summarizes the distribution method of transmission ratio of multistage planetary gear transmission mechanism-"the high speed level should be slightly larger than the low speed level". The curve diagram of the relation between transmission ratio distribution and efficiency of each type of transmission mechanism is given, which can be used as a reference in the design of the planetary gear train. The above analysis is applied to the design of hydraulic excavating wheel side reducer. The reducer adopts NGW type two-stage differential closed planetary transmission mechanism. By analyzing the existing product efficiency, The efficiency of gear side reducer is calculated by dynamic simulation of mechanism, which proves that the design method of configuration analysis and efficiency calculation of multistage planetary transmission mechanism is practical in engineering practice.
【学位授予单位】：湘潭大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH132.46

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