A variable displacement pump could save energy during the long holding time.
变量泵可在长的保压时间内节省能源。
The variable displacement pump operates in only one of the first and second pump displacement settings.
变量泵仅运行在第一和第二泵排量位置中的一个位置上。
The hydraulic system with variable displacement pump-constant displacement motor has the function of overload protection.
由变量泵-定量马达组成的液压系统具有超载保护，防止电缆被强行拉断的功能。
The computer PID control for electro hydraulic proportional constant presure variable displacement pump with electric feedback is introduced.
介绍了电反馈电液比例恒压变量泵的计算机PID控制。
The paper proposes a new method to realize constant power control for electrohydraulic proportional load-sensing radial piston variable displacement pump.
本文提出了对电液比例负载敏感径向柱塞变量泵实现恒功率控制的新的控制方法。
Servo variable displacement pump because of its compact structure, small size, rigidity, fast response, etc., are widely used in various industrial applications.
伺服变量泵因为其构造紧凑、体积小、刚性大、响应速度快等优点，广泛用于各种工业场合。
The improved digital variable displacement pump possesses such merits as strong antipollution ability, good repeatability, convenient interfacing with computer, and low cost.
改进后的数字变量泵具有抗污染能力强，重复性好，与计算机接口方便，价格低廉的优点；
There are mainly two problems caused by long pipes in load sensing system. One is the stability of load sensing variable displacement pump and another is the response lag of feedback pipe.
从中发现了长管道给负载敏感系统所带来的两个主要问题，即负载敏感变量泵的稳定性问题和反馈油路响应滞后问题，从而确定了本文的理论研究方向。
Through a study in characteristic curve of the engine and hydraulic pump, the matching efficiencies between engine and fixed and hydraulic variable displacement pump were analyzed respectively.
综合发动机和液压泵的特性曲线，分别对发动机与液压变量泵、定量泵进行了匹配效率分析；
Additionally, the coordinate principle of variable displacement pump with constant power control and load-sensing control system is demonstrated, and establish the constant power control model.
针对液压泵恒功率调节系统，建立了动态数学模型并对恒功率调节与负载传感系统的控制协调机理进行分析。
This paper calculates, analyses and determines the pressure point of maximum of ouput power and saving-energy efficiency of differential pressure and Limited pressure variable displacement pump.
本文计算、分析、确定了限压式变量系和差压式变量泵输出功率最大值和节能效率最大值的压力点；
Pretty flow pressure characteristics are being realized in the variable displacement pump with valve adjuster. But more violent flow pulse was proved by experiment at the range of higher pressure.
阀式变量泵具有理想的静态流量压力特性，实验发现在高压变量区具有较强的流量脉动甚至脉冲现象。
At present, digital variable displacement axial piston pump has some problems.
目前，数字变量轴向柱塞泵还存在着很多问题。
Variable displacement servo pump in the small variable phase, likely to cause the low efficiency of the system, heat large shortcoming.
伺服变量泵在小排量变量阶段，容易造成系统效率低、发热量大等缺点。
This paper presented the working principle and structure of the double-action vane pump, analyzed its mechanism of variable displacement and characteristics of energy saving.
本文介绍了双作用叶片式二次元件的结构和工作原理，分析了其节能原理和特点。
The characteristic is similar to that of the constant pressure variable displacement regulation for the pump.
这一特性和泵的恒压变量调节特性相类似。
By the new model, a variable displacement hydraulic pump is simulated by the ordinary hydraulic component with hydraulic resistance, abrupt pressure change and invariable flow.
该模型将变量液压泵等效为液阻、压力突变、恒流源构成的一般液压元件。
The pump controlled variable displacement hydraulic system works together with the electronic proportional control system, high efficiency, energy saving and precise control.
泵控变量液压系统，与电比例操作系统紧密结合，节能高效，控制精确。
The main content is as follows: 1. The supporting way of the axial variable displacement piston pump is researched.
论文主要完成以下研究内容：1。对轴向变量柱塞泵的支撑方式进行了研究。
At the present, the key technology of the axial variable displacement piston pump is grasped by the foreign companies, the research and manufacture level in our country are on the elementary stage.
目前，轴向变量柱塞泵的关键技术掌握在国外公司手中，国内的研究、生产、制造均还处于初级阶段。
Modeling accurately the hydrostatic unit is the key of simulation of stepless steering performance of vehicle. The dynamic analysis of displacement control mechanism of variable pump affected by c…
本文通过试验和仿真两个方面，分析了排量控制阻尼孔对排量控制机构响应特性的影响。
Modeling accurately the hydrostatic unit is the key of simulation of stepless steering performance of vehicle. The dynamic analysis of displacement control mechanism of variable pump affected by c…
本文通过试验和仿真两个方面，分析了排量控制阻尼孔对排量控制机构响应特性的影响。
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