数字配流与调速式液压马达的建模与实现

Modeling and Implementation of Hydraulic Motor with Digital Distribution and Speed Adjusting Mechanism

研究了一种采用高速电磁开关阀组实现配流与调速的新型液压马达.介绍了液压马达的工作机理及结构特点;建立数学模型,并对液压马达不同负载下的调速特性和换向特性进行了仿真.结果表明,新型液压马达不仅可以通过改变高速电磁开关阀控制信号占空比来调节液压马达的转速,而且可以通过切换配流状态表实现换向.最后,通过新型液压马达样机上的实验研究,证明了该新型液压马达数学模型是合理和有效的.

A new type of hydraulic motor with digital distributor on which ten high speed solenoid on/off valves are mounted was investigated.The operating principle and the structure characteristics are introduced.The mathematical model of this hydraulic motor is established and the simulation about speed adjusting and direction change characteristics is conducted.The simulation results show that the new digital distributor can not only realize the speed adjusting by varying the duty cycle of the control signal but also change the rotary direction of the new hydraulic motor by switching the distribution tables.Finally,the model machine of this new type of hydraulic motor was developed and experiments were carried out to validate the simulation results.The experimental results show that the model of the new hydraulic motor is correct and effective.