双头螺杆泵比单头螺杆泵工作腔室多，泄漏少，泵的排量大，效率高。
The twin screw pump is of the properties of less leakage, big displacement and effectivity.
这种系统不是靠改变泵的排量而是靠改变泵的转速来改变其输出流量，从而实现对液压系统的控制。
This hydraulic system is controlled by different pump's flux, which is realized by changing the speed of pump, instead of changing pump's displacement.
我们的带有排气消声器和进出口过滤器的正排量泵为您保证顶端缺口的可靠性能。
Our positive displacement pumps with exhaust silencer and inlet and outlet filters assure you top notch reliable performance.
提出了一种以一对共轭轮为工作元件的新型大排量液体泵。
A kind of novel large liquid discharge pump that takes a pair of conjugate wheel as the working component has been put forward.
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.
根据钻井水力学理论，在各井段最小排量确定的基础上，建立了泥浆泵泵压、泵功率预测模型。
According to the theory of drilling hydraulics, prediction model for mud pump was established on the basis of ensuring minimum flow rate.
在含水率较高的大排量浅井中，流体的惯性效应使设备负荷增加，并降低了泵效。
Fluid inertia effects increase equipment loading and reduce efficiency in high rate shallow Wells with high water production.
详细分析了斜齿齿轮泵的瞬间排量、单齿排量、困油区容积的瞬间变化率及变化量、螺旋角的影响。
Analyze the Helical Gear Pump for the instant displacement, single gear displacement, theinstant change ratio and change value of trapping volume and the influnce of screw angle in detail.
并以一台较大排量的轴向柱塞泵为被试泵，建立了流量脉动测试系统，实现了多种压力下被试泵流量脉动的测试。
An axial piston pump with large displacement has been used as the pump under test, a measurement system has been put forward and flow ripples at different pressures have been determined.
对比渐开线齿轮泵，单圆弧齿轮泵的瞬时排量与齿轮角速度成正比，且稳定，无脉动。
Comparing with involute gear pump, the instant displacement is in direct proportion to the angular velocity of the gear and stable without pulsation.
根据摆线泵的啮合线方程，建立了用几何法求解摆线泵的瞬时流量、排量、流量脉动率的数学模型。
Based on the equation of action line for cycloidal pump, a geometrical mathematical model is built to solve instantaneous flow, displacement, average flow and the pulsation of the pump.
为了降低三缸单作用钻井泵的压力和排量波动，通常在排出管线上安装有空气包。
In order to reduce the fluctuation of pressure and discharge capacity of the triplex drilling pump, the air accumulator is often fixed on the discharge pipe.
同时，发动机转速的恒定也使液压泵输出排量稳定，进而保证了行走速度和振动频率的稳定，提高了压实质量。
At the same time, constant engine speed stabilizes output displacement of hydraulic pump and then stabilizes travel speed and vibratory frequency in turn, so that compaction quality is increased.
首先根据液压活塞式混凝土泵的工作原理，阐述了混凝土泵排量的基本数学模型，指出模型中的实时泵送效率是解决问题的关键。
The basic mathematic model of the output of hydraulic piston concrete pump was described in terms of its working principle, the influence on real-time pumping efficiency was analyzed.
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.
设计了一个盾构掘进机的刀盘驱动液压系统，该系统是开式液压系统，应用电液比例控制技术实现了泵排量实时调节。
A hydraulic drive system of cutter head in shield tunneling machine was designed, which is open type hydraulic system and controlled in open-ring.
泵的设计应满足排量要求，并能够按照清洗管线系统所要求的速度来循环化学品。
The pump design shall be such to have the desired capacity and shall be capable to circulate the chemical at velocity required for cleaning of piping system.
根据建立的函数关系式，可直接计算泵的容积效率和所需的泵的体积排量，或迭代求出地面产液量。
Based on the established functional relation, the V_e and the required P_d can be calculated directly, or the total liquid production rate at surface can be calculated indirectly.
往复式正排量泵可能使用带有固定密封的活塞；带有动密封的活塞；或隔膜来运行水泵。
Reciprocating Positive Displacement pumps may use plungers with static seals pistons with dynamic seals or liquid diaphragms to achieve their pumping action.
在此基础上，采用数值积分方法分析了凸轮泵的理论排量、容积利用系数等特性。
On this basis, the theoretical flow and effective volumetric rate are calculated with digital integration.
改变活塞和缸体的直径可改变泵的压力和排量范围。
The capacity and pressure rating can be varied easily by changing the diameter of the piston and cylinder lines.
泵结构简单，效率高，有确定的排量且无波动，具备较为理想运行特性。
The structure of pump is simple; the efficiency is high, with certain exhaust quantity and with no motion, having the movement character which is more ideal.
现场的实际应用情况说明，LB1600大排量螺杆泵采油系统与95泵、电泵相比，排量降低有限，节电效果明显。
The practical application of LB1600 large displacement screw pump systems showed that the displacement reducing are limited and energy-saving are effect compared with 95 pumps.
由于这些限制，齿轮泵制造商将提供一系列产品，即不同的规格及排量(每转一周所排出的量)。
Due to the limit, the gear pump manufacturers will provide a series of products of different specifications, and emissions per week turned out (of the).
结合先前的设计经验，本文对大排量lb1600螺杆泵采油系统进行了设计计算。
In this paper, LB1600 screw pump system has been designed and calculated combination of the previous design experience.
两个发动机驱动的电控液压泵（排量可变），四个大型和四个小型的液压控制马达（排量可变）。
The systems comprise two engine-driven, electrically controlled, variable displacement hydraulic pumps and four large and four small hydraulically controlled, variable displacement hydraulic motors.
研制的活动热洗车利用变频技术和柱塞泵，具有压力及排量可调节的特点，可以随时随地实施油井热洗。
Moving hot washing truck made by us use converter technique and plunger displacement pump. Its pressure and flow rate can 'be adjusted easily. It can do hot washing anywhere at any times.
J EFRI正向高压驱替泵具有排量大、精度高的特点，已广泛应用于石油科研部门。
The JEFRI high pressure displacement pump has of large flow rate and high accuracy, so it is widely used in petroleum scientific institutions.
J EFRI正向高压驱替泵具有排量大、精度高的特点，已广泛应用于石油科研部门。
The JEFRI high pressure displacement pump has of large flow rate and high accuracy, so it is widely used in petroleum scientific institutions.
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