变量泵可在长的保压时间内节省能源。
A variable displacement pump could save energy during the long holding time.
双作用式变量叶片泵是一种新型变量泵。
The double-acting variable-vane pump is a new type of variable pump.
最后对系统中的变量泵进行了动静态性能试验。
Finally, the static and dynamic test of the variable pump had been taken.
变量泵的多功能控制是一种泵的新的控制方式。
The multifunctional control of variable pump is a new type of control means.
介绍了电反馈电液比例恒压变量泵的计算机PID控制。
The computer PID control for electro hydraulic proportional constant presure variable displacement pump with electric feedback is introduced.
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 variable displacement pump operates in only one of the first and second pump displacement settings.
在步进梁速度电液比例控制系统中，比例变量泵是关键组成部分。
In the walking beams velocity electro-hydraulic control system, proportional variable pump is the key components.
现在，国产大中型液压挖掘机一般采用柴油机驱动变量泵进行工作。
Now, the domestic large-and-middle-scale hydraulic excavator generally adopts the diesel engine to urge the variable pump to carry on the work.
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。
Variable displacement servo pump in the small variable phase, likely to cause the low efficiency of the system, heat large shortcoming.
变量泵的控制方式有恒压力、恒流量、恒功率、电液比例和负荷敏感控制等。
Variable displacement pump's control style has many ways, such as constant pressure, constant fluid, constant power, electrohydraulic proportional and load-sensing etc.
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 hydraulic system with variable displacement pump-constant displacement motor has the function of overload protection.
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.
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。
The paper proposes a new method to realize constant power control for electrohydraulic proportional load-sensing radial piston variable displacement pump.
所以选择限压式变量泵为宜，因为这种类型的泵的流量随系统压力的变化而变化。
So, the selection of variable pump pressure limit is appropriate, because this type of pump flow with the system pressure varies.
试验研究结果表明，前馈自适应控制是实现变量泵源阀控系统高精度跟踪控制的有效方法。
The tests results show that the controller is the effective control method for the variable pump & valve controlled system.
当水开关关闭时变量泵不供油，电流下降使电机处在空载待机状态，这样就有效达到节能。
When the switch is closed, the variable pump has no oil supply, the current decline will keep the motor in empty waiting state, thus effectively save energy.
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；
The improved digital variable displacement pump possesses such merits as strong antipollution ability, good repeatability, convenient interfacing with computer, and low cost.
仿真结果表明，基于自适应模糊PID控制器的电液比例排量变量泵具有良好的动态性能。
Simulation results show that the dynamic characteristic of electro-hydraulic proportion controlling radial piston pump using this self-adapting fuzzy PID controller is very good.
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；
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.
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。
Servo variable displacement pump because of its compact structure, small size, rigidity, fast response, etc., are widely used in various industrial applications.
本文首先分析了发动机的全负荷速度特性、部分负荷特性和变量泵在不同的工况下的效率特点。
This dissertation has analyzed the full-load speed characteristics of the diesel engine, some load tempo characteristics and characteristics of variable pump at first.
本文根据变量泵的具体情况，为其设计了自适应的神经网络模糊控制器，实现了变量泵的智能控制。
This paper describes that the combination of neural networks and fuzzy controller make the designing an intelligent controller for variable piston pumps become feasible and realistic.
本文从液压泵与负载匹配的角度出发，将负载敏感变量泵应用到装载机工作装置液压系统的设计中。
This paper applies load-sensing variable pump to the hydraulic system of loader considering the matching of pump and the load.
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；
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.
仿真结果表明，基于自适应模糊pid控制器的电液伺服控制径向柱塞变量泵具有良好的动态性能。
Simulation results show that the dynamic characteristic of electro-hydraulic servo controlling radial piston pump using this self-adapting fuzzy PID controller is very good.
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。
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.
径向柱塞变量泵可以采用手动控制、电液比例控制或负载敏感控制等多种控制方式，实现恒流量、恒压力、恒功率的控制。
The radial piston pump can adopt manual-control or electro-hydraulic proportional control to realize the control of constant flow, constant pressure, constant power and load sensitivity etc.
为避免上述问题白勺出现，文章利用MATLAB软件对伺服变量泵白勺小排量变量阶段停止了分析，结合试验对仿真结论停止了分析。
To avoid these problems, this variable using MATLAB software, the servo variable stages of small-displacement pumps have been studied with the simulation test results are analyzed.
液压阀开启有响应时间，定量泵系统启动时，瞬间压力冲击特别大，油管容易爆裂。变量泵启动时只有3mpa左右的待命压力，消除了爆管的隐患。
As there is certain response time for hydraulic valve startup, constant pump has to bear the momentary extremely high pressure impact with a high risk of oil pipe explosion.
液压阀开启有响应时间，定量泵系统启动时，瞬间压力冲击特别大，油管容易爆裂。变量泵启动时只有3mpa左右的待命压力，消除了爆管的隐患。
As there is certain response time for hydraulic valve startup, constant pump has to bear the momentary extremely high pressure impact with a high risk of oil pipe explosion.
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