纯水液压换向阀；
由电液比例换向阀和轴向变量泵组成的比例变量泵系统是一种新型液压动力机构。
The proportional variable pump system made up with electrohydraulic proportional reversing valve and axial variable pump is a new kind of hydraulic dynamic structure.
介绍一种能够在工程机械液压系统中改变两个定量马达连接方式的液控换向阀。
The author introduces a kind of hydraulically controlled direction valve to change the connecting mode between two fixed displacement motors in hydraulic systems of construction machinery.
提出了一种采用旋转式换向阀及弹簧蓄能器模拟发动机负载的液压负载模拟系统，详细介绍了该系统的工作原理；
A new hydraulic load simulation system, adopting a rotation directional valve and using a spring accumulator simulating the starter load, is proposed and working principles are described.
液压系统中阀门(换向阀等)突然关闭时，液压泵的流量脉动频率和管道的基本频率相互作用，可能发生谐振。
In hydraulic transmission system, the pump's flow pulse frequency and the pipes base frequency affects each other, if the valves shut suddenly, resonance oscillation may take place.
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.
换向阀与液压油源间、换向阀与转阀间和转阀与截止阀间均相连接。
The reversing valve and the hydraulic oil source, the reversing valve and the rotating valve, the rotating valve and the stop valve are all connected.
一种应用于远程气动控制液压系统的大、小流量并存的多气控换向阀。
The utility model discloses a pneumatic control multi-way directional valve applied to a remote pneumatic-control hydraulic system with the coexistence of large flow rate and small flow rate.
通过液压冲击现象的机理研究，找到其影响因素，设计的旋转换向阀及液压系统。
Via the mechanism research of the phenomenon of hydraulic shocks, the shock factors are found and designs of the rotating reversing valve and hydraulic system are finished.
设计了液压负载模拟系统中的关键元件旋转式换向阀，建立了其数学模型和仿真模型，并仿真分析其关键参数对液压负载模拟系统的影响规律。
The rotation directional valve, key component of the system, is developed. Influence principles of structural parameters are analyzed based on the mathematical and simulation model.
在不操作多路换向阀手柄时，油泵排出的液压油经多路换向阀回到油箱。
When we don t operate the multiple directional value handle, the hydraulic oil that pump discharge back to oil box by multiple directional value.
本实用新型提供了一种改良的液压多路换向阀，属于机械技 术领域。
The utility model provides an improved hydraulic multichannel conversion valve and belongs to the technical field of machinery.
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.
液压油缸可单独使用，也可串联使用，它一端与机动式换向阀连接，另一端与抽油杆柱连接。
The hydraulic cylinder can be used alone or connected in series. One end of the hydraulic cylinder connects to the motor driven change valve, the other end connects to the rod string.
现有液压实验台可以做通用液压元件的实验，却不能满足特殊液压元件（如插装阀和多路换向阀）的测试。
The existing hydraulic test bench can test experiments of general hydraulic components while as can't test special hydraulic components(such as cartridge valves and multi-way directional valve).
针对液压缸差动回路输出速度受管道液阻及差动工作时换向阀工作状态影响的问题，分析了这些影响因素。
This paper points out the influence on the start-up circuit of the differential-voltage protection when the capacitors primary connection is changed.
针对液压缸差动回路输出速度受管道液阻及差动工作时换向阀工作状态影响的问题，分析了这些影响因素。
This paper points out the influence on the start-up circuit of the differential-voltage protection when the capacitors primary connection is changed.
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