内曲线行星齿轮泵非圆行星轮系的研究

发布时间：2018-04-30 13:00

本文选题：内曲线行星齿轮泵 + 非圆齿轮　；参考：《安徽理工大学》2015年硕士论文

【摘要】：普通齿轮泵传动部分是一对圆柱齿轮,两个齿轮相互啮合,齿轮啮合的进出两侧分别于泵体和端面形成两个密闭的容腔。齿轮转动过程中,两腔的体积的变化使得啮合处两侧排油和吸油。这种齿轮泵有结构简单、自吸性好、寿命长等优点,但它产生的噪声比较大、流量和压力的脉动大、排量不具有可变性。接着人们发明了一种利用行星齿轮机构传递动力的行星齿轮泵。这种泵结构紧凑、噪声小,并克服了径向力不平衡的缺点,但它的泄漏比较大。但在较高压和大排量的条件下,以上齿轮泵都不适合。于是,非圆行星齿轮机构被用于泵的传动系统中,这种新型的泵叫做内曲线行星齿轮泵。内曲线行星齿轮泵主要由内齿圈、太阳轮和行星轮组成。一方面,多个行星轮在内齿圈和太阳轮之间沿某一节曲线作平移运动；另一方面行星轮在绕着它的质心作转动。非圆行星轮系这种运动关系使它们之间形成的多个密闭腔的体积发生周期性变化,从而完成吸油和排油。这种泵具有耐高压、耐油污、脉动小、排量大等优点,符合现代液压机械趋于向高压化发展的方向。因此,这种泵具有很大的研究意义。本文主要研究的是一种内曲线行星齿轮泵的非圆行星轮系部分,拓展对非圆齿轮的研究,希望在非圆行星轮系的设计、太阳轮和内齿圈参数的计算、非圆齿轮的模型的建立、非圆齿轮的静力学分析和模态分析以及非圆齿轮的加工方面在前人的基础上进一步研究。 (1)简述了内曲线行星齿轮泵的的结构和原理,分析了非圆齿轮的研究成果、非圆行星轮系的应用和发展现状,本课题研究的背景和意义。 (2)研究了非圆行星齿轮机构的运动特点,先确定内曲线行星齿轮泵的类型,初选模数。根据非圆行星轮系的运动特性,应用MTLAB软件和其他计算软件,求出太阳轮和内齿圈的各个参数及节曲线方程,为下面非圆齿轮的三维模型的建立打下基础。 (3)以一个类型的内曲线行星齿轮泵为实例,建立非圆行星轮系的三维模型,研究非圆齿轮的建模方法,为非圆齿轮的仿真和分析提供实体模型,也为非圆齿轮的加工提供条件。 (4)对非圆行星轮系的太阳轮、内齿圈和行星轮进行静力学分析和模态分析,校核在一定的油压下齿轮受到的最大应力和最大变形量。然后与实际比较,看选择的材料的强度和设计的参数是否符合要求,得出齿轮各阶的振动频率和振型,以便有效的避免机构或零件发生共振。 (5)简述目前条件下非圆齿轮的加工方法,研究线切割加工非圆齿轮的方法。通过这篇文章的研究,可以找到一种求解非圆节曲线参数及方程的方法,及非圆齿轮的建模和结构分析,为设计制造出结构合理、性能优越且寿命长的内曲线行星齿轮泵提供条件。
[Abstract]:The transmission part of the common gear pump is a pair of cylindrical gears, the two gears meshing each other, the two sides of the gear meshing form two closed cavities in the pump body and the end face, respectively. During the gear rotation, the volume of the two cavities changes so that the two sides of the meshing place drain oil and absorb oil. This gear pump has the advantages of simple structure, good self-priming and long life, but it produces more noise, larger pulsation of flow rate and pressure, and no variability of displacement. Then a planetary gear pump using planetary gear mechanism to transmit power was invented. The pump is compact in structure, low in noise and overcomes the shortcoming of radial force imbalance, but its leakage is relatively large. But under the condition of high pressure and large displacement, the above gear pump is not suitable. Thus, the noncircular planetary gear mechanism is used in the drive system of the pump, a new type of pump called the inner curve planetary gear pump. The inner curve planetary gear pump is mainly composed of inner gear ring, solar gear and planetary gear. On the one hand, the inner gear ring and the sun wheel move along a certain curve, and on the other hand, the planetary wheel is rotating around its center of mass. The motion relation of non-circular planetary gear trains periodically changes the volume of several closed cavities formed between them, thus accomplishing oil absorption and oil expulsion. This kind of pump has the advantages of high pressure resistance, oil pollution resistance, small pulsation, large displacement and so on, which is in line with the development trend of modern hydraulic machinery towards high pressure. Therefore, this kind of pump has the very big research significance. This paper mainly studies the non-circular planetary gear system of a kind of inner curve planetary gear pump, and extends the research on non-circular gear. It is hoped that the design of the non-circular planetary gear system, the calculation of the parameters of the solar wheel and the inner gear ring, the establishment of the model of the non-circular gear, the design of the non-circular planetary gear system, the calculation of the parameters of the solar gear and the inner gear ring, The static and modal analysis of non-circular gears and the machining of non-circular gears are further studied on the basis of previous studies. 1) the structure and principle of inner curve planetary gear pump are briefly introduced, the research results of non-circular gear, the application and development status of non-circular planetary gear train, and the background and significance of this research are analyzed. In this paper, the kinematic characteristics of non-circular planetary gear mechanism are studied. The type of inner curve planetary gear pump and the primary modulus are determined. According to the motion characteristics of the non-circular planetary gear train, the parameters and the nodal curve equations of the solar wheel and the inner gear ring are obtained by using MTLAB software and other calculation software, which lays the foundation for the establishment of the three-dimensional model of the lower non-circular gear. Taking a type of inner curved planetary gear pump as an example, the three-dimensional model of non-circular planetary gear train is established, and the modeling method of non-circular gear is studied, which provides a solid model for the simulation and analysis of non-circular gear, and also provides conditions for the machining of non-circular gear. (4) static analysis and modal analysis of solar gear, inner gear ring and planetary gear of non-circular planetary gear train are carried out to check the maximum stress and maximum deformation of the gear under certain oil pressure. Then compared with the practice, the strength of the selected material and the design parameters meet the requirements, and the vibration frequency and mode shape of the gear are obtained, in order to effectively avoid the resonance of the mechanism or parts. In this paper, the machining methods of non-circular gears under current conditions are briefly described, and the methods of wire cutting for non-circular gears are studied. Through the research of this paper, we can find a method to solve the parameter and equation of non-circular curve, and the modeling and structure analysis of non-circular gear, and make the structure reasonable for the design and manufacture. Superior performance and long life of the inner curve planetary gear pump to provide the conditions.
【学位授予单位】：安徽理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TH132.41;TH325

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