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提出一种新型液压变压器配流副结构以扩展其输出压力,建立了恒压网络实验系统以测试液压变压器的性能.通过仿真和实验研究来探讨液压变压器的输出压力、排量特性及速度稳定性.研究结果表明:所设计的液压变压器能够实现压力调节功能,输出压力由配流盘控制角度决定同时受负载的影响,负载压力与油源压力之比的变化范围大致为0～1.2.液压变压器是一个变排量液压元件,排量由配流盘的控制角度决定,而不受负载的影响.液压变压器的速度稳定性随着配流盘控制角度的增加而提高,当配流盘控制角度小于15°时,液压变压器存在运动死区.液压变压器的高瞬时驱动扭矩波动是其速度稳定性差的主要原因.研究结果将有助于进一步提高液压变压器的性能.
A new type of distribution structure of hydraulic transformer was proposed to expand its output pressure and a constant voltage network experimental system was set up to test the performance of the hydraulic transformer.The output pressure, displacement characteristics and speed stability of the hydraulic transformer were discussed through simulation and experimental research. The results show that the designed hydraulic transformer can realize the function of pressure regulation, the output pressure is determined by the control of the distribution board and influenced by the load at the same time, and the ratio of load pressure to oil pressure is about 0 ~ 1.2. The hydraulic transformer is a Variable displacement hydraulic components, the displacement is determined by the control of the distribution plate angle, without being affected by the load.Hydraulic transformer speed stability increases with the increase of the control angle of the distribution plate, when the control angle of the distribution plate is less than 15 °, Hydraulic transformers have a dead zone of motion.The high transient torque ripple of hydraulic transformers is the main reason for the poor speed stability.The results of the study will help to further improve the performance of hydraulic transformers.