查询词典 pump

When pump starts, the lower impeller lifts the solution up step by step. And the extreme centrifugal force from the enlarged higher impeller stops the solution as it entering the higher impellr. At the same time, the full solution in the chamber stops the air mixed with the solution in the chamber to go down. This way masterly eliminates both big problems of vertical sealless pump, overflow at high pressure and bubbles at big flow.

塑宝SV泵剖面结构SV Super Series Analytical cross section SV泵剖面结构泵开始运转时，底部叶轮将液体逐步上推，待液体进入上部叶轮时，即受加大之背叶的强大阻力而无法上升，但上部叶轮所卷入液体中的空气，却受阻於水室中贮满的液体而无法下降，如此巧妙地排除了立式无轴封泵高压时溢流，或大流量时吸入空气的两大难题。

The dissertation theoretically analyses software direct compensating motor speed loss of open loop pump-control-motor speed governing system with inverter. The motor speed loss formula and compensating coefficient formula are given, and this provides the theoretic foundation for using software direct compensating method. The dissertation puts forward the control scheme of software direct compensating motor speed loss of open loop pump-control-motor speed governing system with inverter, and the method of "load sectionalization linear compensation".

具体来说，本文的主要贡献包括如下几个部分：(1)对软件直接补偿开环变频泵控马达调速系统的马达转速降落进行了理论分析，给出了马达转速降落公式和补偿系数公式，为软件直接补偿开环变频泵控马达调速系统的马达转速降落提供了理论依据；提出了变频泵控马达调速系统的负载补偿控制方法和&负载分段线性补偿&方法，由此提高了调速系统的速度刚性和调速精度。

The large-scale finite-elenent software ANSYS was scroll vacuum pump, thus analyzing simulatively the stress and deformation of the pump in its running process.

在对涡旋真空泵运行温度场采用大型有限元分析软件ANSYS进行模拟与研究的基础上，对其工作过程的应力与变形进行了模拟分析。

Slusher's new implant is known as the world's smallest heart pump, it's only half the size of a pencil, but it can pump two and a half liters of blood a minute.

斯鲁施尔的新植入是世界上最小的心脏泵的支持，这只是一半大小，一支铅笔，但它可以泵两年半血升1分钟。

The main products are the United States Milton metering pumps, pump-up due to magnetic force, Dalian Sool TING centrifugal pumps, all kinds of pneumatic diaphragm pump, processors and Canadian drug pipeline system.

主要产品有美国米顿罗计量泵、胜达因磁力泵，大连苏尔寿离心泵、各种气动隔膜泵、管道处理器及加药系统等。

Research content and research object. The Coagulant Dosage Automatic Control System is discussed emphatically. Including the relation is put up between target standard and the infection factor by date analyzed chart and educational established and sum up the best working point. The target standard including SS COD and OIL .The infection factor including the dosage of PAC PH Mill INTENSION and TIME. On the basis of craft character and control request, it makes a selection of scheme to the whole control system. Finally a scheme is chosen and described as follows: CPU222 of SIEMENS PLC S7-200 is used as the control kernel. V606IC TOUCHER is used as communication man and machine. Controlling pump, compressor, metric pump of system by gathering andanalyzing the flow, PH of raw water .

重点探讨系统的投药自动化，包括系统的数学模型建立的过程，通过数据分析，采用图表和方程式建立系统排放指标(SS、CODcr、含油量)，与各种因素(PAC用量、PH值、搅拌强度、时间)的关系，确定系统的最佳工作点；根据系统工艺特点以及控制要求，对控制系统设计方案进行了选择，确定以西门子PLC(S7-200 CPU222)为控制核心，V606IC10触摸屏作人机界面，通过对原水流量和PH计采样、分析，实现系统中的泵、风机、计量泵等控制；文中从功能上简要地介绍监控系统和给出了自动化原理构成图、PLC软件流程图及部分主要程序。

After comprehensive analysis, we can conclude that the given design method of trapeziform labyrinth screw pump is practical and design parameters are reasonable. The educed result has the directive significance for engineering practice of this kind of pump.

综合分析后发现，本文针对梯形迷宫螺旋泵给出的设计方法切实可行，设计参数合理，对实际生产有指导意义。

Differential pressure compensating pump is a new one that can generate underbalance low pulse, it is also called underbalance pulse deep oil well pump.

压差补偿泵是一种能产生负压低脉冲的新型结构的抽油泵，又名负压脉冲深井采油泵。

Metering rooms in Daqing oilfield adopt microcom puter to meter and LQR-50 type gas meter and float ball joint control pipeline pump. In operation, oil en tering gas meter or float ball malfunction to make pump unstarting or ceaseless frequently.

大庆油田计量间采用微机控制计量，选用的LRQ-50型气表和浮球接点控制管道系在运行时，经常发性气表进油以及浮球失灵造成泵不启动或启不停等现象。

This paper has mainly analysedvertical oblique flow circulating pump operation properties. Through monistic flowdesign theory, carried out preliminarily design for impeller, and completedthree-dimensional model analysis through CAD software. With the aid of CFD-FLUENTsoftware platform, have carried out value for flowing imitation in pump, the SIMPLECmethod on unstructural grid has realized pressure the couple of speed, which verified theresult of preliminary design.

本文主要分析了立式斜流循环水泵运行特性，通过一元流设计理论，对叶轮进行初步设计，并通过 CAD 软件进行立体三维模型分析，借助 CFD-FLUENT 软件平台，对水泵内流场进行了数值模拟，利用非结构网格上的 SIMPLEC 方法实现压力-速度的耦合，对初步设计进行计算结果的验证。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。