摘要
为解决现有液压马达径向力不平衡造成马达易损坏的问题,基于双定子思想,设计了一种力偶型径向柱塞马达,该马达通过力偶输出转矩,输出轴的径向力平衡,不受侧向力的作用。在马达的一个壳体内形成了内、外两个马达,通过不同的配流方式可以输出3种转矩和转速。本文阐述了马达的结构特点和工作原理,分析了导轨曲线与马达转矩转速脉动的关系,通过对马达瞬时转矩的分析,得出了马达转矩转速无脉动的条件,及转矩转速脉动为零时导轨曲线的幅角分配规律。对马达样机进行了加工、实验,测试了马达在3种工作方式下的输出特性。结果表明,转矩转速脉动与进油区段柱塞的速度之和有关,若速度之和为常数,理论上无转矩转速脉动。
In order to solve the problem that the existing hydraulic motor is easy to be damaged due to unbalanced radial force,a couple force-type radial piston motor was designed based on the idea of double stators. The radial force balance of motor output shaft was not affected by the lateral force,and the torque was output through the force couple. The inner and outer motors were formed in one shell of the motor,and three kinds of torque and rotational speed can be output through different flow distribution modes.The structural characteristics and working principle of the motor were introduced,and the relationship between curve of guide rail and pulsation of motor torque and rotational speed were analyzed through the analysis of instantaneous torque of motor,the condition that torque and rotational speed of the motor without pulsating was obtained,and the law of angle distribution of guide rail curve when the torque ripple was zero was obtained. A motor test bench was built to test and measure the output characteristics of the motor. When the inner motor worked alone,the output torque was low and the rotation speed was high; when the outer motor worked alone,the torque was high and the rotation speed was low; when the inner and outer motors worked together,the maximum torque and minimum rotation speed were output.The motor prototype was processed and tested,and the output characteristics of the motor under three working modes were tested. The results showed that the torque pulsation was related to the sum of velocities of plungers in the oil inlet section. If the sum of the velocities was constant,there was no torque-speed pulsation in theory.
引文
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