多作用力偶液压马达的理论与实验研究

发布时间：2019-01-08 12:53

【摘要】：液压马达是把由液压泵提供的液压能转换成机械能的转换装置，其在工作介质的作用下，输出转矩和转速。液压马达的径向受力不平衡，限制了液压元件的发展，制约其应用领域。目前在各种领域广泛应用的液压马达在实际应用中还存在不能实现多级定转矩和定转速的输出。多作用力偶液压马达由一个转子对应于两个定子，，形成内、外多个相互独立的液压马达共用一个输出轴，可以通过切换马达之间的连接，在不改变液压马达输入流量和压力的情况下，实现液压马达多级定转速和定转矩调节的输出，并且马达的转子受力平衡。本文首先介绍了国内外的液压技术的发展局势，并介绍了现在广泛应用的液压马达的受力情况。其次，在形成的多个内、外相互独立液压马达中，一内一外液压泵与液压马达有14种连接方式就可以满足不同的工况。从而提出并定义了多作用力偶液压马达的设计理念及定义，并对多作用力偶液压马达的工作原理、结构特点等做了详细的介绍，利用Solidworks对液压马达三维实体建模。再次，推导出多作用力偶液压马达在4种工况下的排量、瞬时流量、瞬时转矩和瞬时转矩的关系式。由于液压马达在输出时有波动，并且外马达(内马达)是由多个完全相同的马达组合而成，组合成的液压马达相互叠加影响了液压马达整体的输出特性，因此在分析马达输出特性的基础上，得出使得马达输出脉动最小时的进出油口的位置。进一步分析由于多作实现联合工作和差动工作，其滞后角和滚柱连杆组的个数对整体马达的输出特性的影响。而后对液压马达的关键零件包括转子、滚柱连杆组作了动力学分析，得到其受力的周期性变化，通过Simulation对转子的受力进行仿真，确定作用数为偶数时马达的受力较好。最后，分析侧板与定子端面间隙中油液温升情况，为改善液压马达的泄漏情况，提出利用浮动侧板改善液压马达的轴向泄漏并分析浮动侧板结构与受力。搭建实验平台，测量、记录、分析马达空载排量、容积效率等实验数据，验证多作用力偶液压马达的可行性。为以后优化多作用力偶液压马达提供依据。
[Abstract]:Hydraulic motor is a conversion device that converts hydraulic energy provided by hydraulic pump into mechanical energy. It outputs torque and rotational speed under the action of working medium. The unbalanced radial force of hydraulic motor limits the development of hydraulic components and restricts its application field. At present, the hydraulic motor, which is widely used in various fields, can not realize the output of multi-stage constant torque and fixed speed in practical application. The multi-force couple hydraulic motor is composed of a rotor corresponding to two stators, forming an output shaft shared by a plurality of independent hydraulic motors inside and outside, which can be connected by switching the motors. Without changing the input flow and pressure of the hydraulic motor, the output of the multi-stage constant speed and torque regulation of the hydraulic motor is realized, and the rotor force of the motor is balanced. This paper first introduces the development situation of hydraulic technology at home and abroad, and introduces the force situation of hydraulic motor which is widely used now. Secondly, in the forming of many internal and external independent hydraulic motors, one internal and external hydraulic pump and hydraulic motor have 14 kinds of connection mode can meet the different working conditions. The design concept and definition of the multi-force couple hydraulic motor are put forward and defined. The working principle and structure characteristics of the multi-force couple hydraulic motor are introduced in detail. The three-dimensional solid model of the hydraulic motor is modeled by Solidworks. Thirdly, the relationship between displacement, instantaneous flow rate, instantaneous torque and instantaneous torque of multi-force couple hydraulic motor under four working conditions is derived. Since the hydraulic motor fluctuates in output, and the outer motor (inner motor) is composed of several identical motors, the combined hydraulic motor superimposed on each other affects the output characteristics of the hydraulic motor as a whole. Therefore, on the basis of analyzing the output characteristics of the motor, the position of the inlet and outlet when the output pulsation of the motor is minimized is obtained. The effects of the lag angle and the number of roller connecting rod on the output characteristics of the whole motor are analyzed. Then the key parts of the hydraulic motor including the rotor and the roller connecting rod are analyzed dynamically and the periodic variation of the force is obtained. The force of the rotor is simulated by Simulation and the force of the motor is better when the action number is even. Finally, the oil temperature rise in the clearance between the side plate and the stator is analyzed. In order to improve the leakage of the hydraulic motor, the floating side plate is used to improve the axial leakage of the hydraulic motor and the structure and force of the floating side plate are analyzed. The experimental data of no-load displacement and volumetric efficiency were analyzed to verify the feasibility of multi-force couple hydraulic motor. It provides the basis for optimizing multi-force couple hydraulic motor in the future.
【学位授予单位】：燕山大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TH137.51

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