通过交流变频调速改变电机的转速来调节液压泵的输出流量。控制液压执行元件的运动速度。
Changing the speed of electric motor by using ac frequency conversion is to regulate output flow of hydraulic pump to control the velocity of the motion of hydraulic actuator.
液压缸具有结构简单，工作可靠，制造容易和使用维护方便等优点，是应用最广的液压执行元件。
Hydraulic cylinder is simple, reliable, easy to manufacture and use of the advantages of easy maintenance, is the most widely hydraulic actuators.
开式系统是指液压泵从油箱吸油，油经各种控制阀后，驱动液压执行元件，回油再经过换向阀回油箱。
Open system is the pump suction from the tank, the oil through a variety of control valves, the drive hydraulic actuators, valve oil return back for another fuel tank.
执行元件：把液压能转换为机械能的各种装置。
Actuator: a device for converting hydraulic energy into mechanical energy.
三位换向阀滑阀机能不但影响液压系统的工作状态，也影响执行元件换向时的工作性能。
Slide valve function of three position directional valve not only affects the working state of hydraulic system but also affects the working performance of implement part when changing direction.
集成块的推广，除执行六面体元件安装管讨论，另一边三个面板液压阀可以安装。
Integrated block is a generalization of hexahedron around, except to execute components installed side pipe fittings, the other three face plate hydraulic valves can be installed.
介绍了一种以液压油缸为执行元件的新型无极绳牵引车的自动张紧装置，并对其系统的结构和工作原理进行了分析。
A new-type automatic take-up of the endless rope towing vehicle with the hydraulic cylinder as actuator was introduced, and the configuration and operational principle of the system were analysed.
压力阀是用来控制液压系统的压力和防止油泵及执行元件的过载。根据功能可分为溢流阀、减压阀、顺序阀、卸荷溢流阀等。
Pressure control valves are used for controlling the pressure in a hydraulic system and protect its hydraulic pump and actuators from over-load.
闭式系统中，液压泵的进油管直接与执行元件的回油管相连，工作液体在系统的管路中进行封闭循环。
Closed system, the hydraulic pump directly into the pipe return pipe connected to the implementation of components, working fluid in the system for closed loop pipeline.
液压系统的设计又主要包括了动力源，控制元件，执行元件，辅助元件的设计。
The hydraulic system design has mainly included the power supply, checks the part, the functional element, auxiliary part design.
并联系统中，当一台液压泵向一组执行元件供油时，进入各执行元件的流量只是液压泵输出流量的一部分。
Parallel system, when a hydraulic oil supply to the actuator when a group entered the implementation of the components of the flow is only part of the hydraulic pump output flow.
并联系统中，当一台液压泵向一组执行元件供油时，进入各执行元件的流量只是液压泵输出流量的一部分。
Parallel system, when a hydraulic oil supply to the actuator when a group entered the implementation of the components of the flow is only part of the hydraulic pump output flow.
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