双转子三凸起凸轮转子叶片马达的理论与实验研究

发布时间：2019-04-02 00:42

【摘要】：液压马达是液压系统中重要的执行元件，而现有的定量马达在输入定流量和定压力液压油时，只能输出一种转速和转矩，很明显当这种定量马达应用在变速或变转矩较大的系统中时，系统的效率较低。双转子凸轮转子叶片马达是一种新型结构的液压马达，它在一个马达的壳体内形成了内、外多个马达，且内、外马达工作相互独立，通过改变内、外马达油口的连接方式可以实现马达的多级定排量输出。即一台双转子凸轮转子叶片马达在输入定压力、定流量液压油的条件下，不通过辅助调节控制阀就能够实现多种转速和转矩输出。本文首先介绍了国内、外液压元件的现状与发展趋势和国内专家、学者对凸轮转子叶片马达的研究方向。在分析了现有马达存在问基的础上，提出了一种新型结构的“双转子”凸轮叶片马达，并对马达的结构特点，工作原理和创新应用进行了详细的介绍，对马达内转子和外转子的受力进行了分析，推导出了马达瞬时转矩公式，找出了影响马达转矩脉动的参数。运用仿真软件solidworks建立了连杆和内转子的三维模型并对其强度进行了仿真，主要包括：对连杆滚柱运动学分析和对连杆磨损前和滚柱直径磨损0.5mm后的连杆抗弯应力强度仿真，以及内马达单独组合工作时，连杆径向抗压强度仿真。建立了马达的泄漏数学模型，找出了影响马达泄漏的主要因素，提出了提高马达容积效率的方法。最后，，通过样机的实验，验证了新型结构马达工作原理的可行性，并针对得出的结论进行了分析和对以后工作的展望。以上所做的工作，只是马达设计初级阶段工作，这些结论和参数的获取，为双转子凸轮叶片马达的优化设计，以便更好地应用于实际奠定了基础。
[Abstract]:Hydraulic motor is an important executive element in hydraulic system, and the existing quantitative motor can only output one kind of rotational speed and torque when input constant flow and constant pressure hydraulic oil. It is obvious that the efficiency of the system is lower when the quantitative motor is used in the system with high speed change or variable torque. The double-rotor cam-rotor blade motor is a new type of hydraulic motor. It forms inner and outer motors in the shell of a motor, and the inner and outer motors work independently of each other by changing the inside. The multi-stage fixed displacement output of the motor can be realized by the connecting mode of the oil port of the outer motor. That is, a double-rotor cam-rotor blade motor can achieve multi-speed and torque output without auxiliary adjusting control valve under the condition of constant pressure and constant flow of hydraulic oil. In this paper, the present situation and development trend of hydraulic components at home and abroad are introduced firstly, and the research direction of cam rotor vane motor by domestic experts and scholars is also introduced. Based on the analysis of the existing motor, a new type of "double rotor" camshaft blade motor is proposed, and the structure characteristics, working principle and innovative application of the motor are introduced in detail. The force on the inner and outer rotors of the motor is analyzed and the instantaneous torque formula of the motor is derived. The parameters affecting the torque ripple of the motor are found out. The three-dimensional model of connecting rod and inner rotor is established by using simulation software solidworks, and its strength is simulated. The main contents are as follows: kinematic analysis of connecting rod roller and simulation of bending stress intensity of connecting rod before wear and after 0.5mm wear of roller diameter. The radial compressive strength of the connecting rod is simulated when the internal motor is combined with each other. The mathematical model of motor leakage is established, the main factors affecting motor leakage are found out, and the method to improve motor volume efficiency is put forward. Finally, the feasibility of the working principle of the new structure motor is verified by the experiment of the prototype, and the conclusion is analyzed and the future work is prospected. The work done above is only in the initial stage of motor design. The obtaining of these conclusions and parameters has laid a foundation for the optimization design of double-rotor cam vane motor in order to better apply it to practice.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2012
【分类号】：TH137.51

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