Analyses the characteristics and load regulation method of secondary pumping variable water flow rate air conditioning systems . Treats the issues about constant pressure difference control in variable pump frequency regulating .

分析了空调二次泵 变 水量系统的特点及其负荷调节方法，探讨了 水泵变速调节中系统定压差控制的相关问题。

Air-pressure water equipment and frequency variable speed regulation equipment are the main furnishment . Pressure control point and flow of water pump should be considered during designing .

建筑恒压供水系统供水设备主要有气压水设备和 变频调速供水设备，设计选择恒压供水设备时，应着重考虑压力控制点和 水泵 的 流量这两项内容。

Analyses the effects of variable flow operation of primary pump water systems based on the temperature difference control method on the operation of air conditioning systems .

分析了一级 泵水系统采用温差控制法实现 变 流量运行对空调系统运行的影响。

Discussion about Pulsation of Stator Radial Force in Variable Flow Vane-type Pump

变量 叶片 泵定子径向力脉动分析

Distributed by pump arrangement with the aid of mixed water hydraulic divider the system can realize variable flow operation system in the whole operation process reducing the flow of pipe network traffic reducing the power consumption of the water pump .

通过水泵分布式布置，借助水力分压器的混水作用，系统在整个运行过程中 变 流量运行，减少了管网的流量，降低了 水泵的电耗。

This paper analyses the flow characteristics of the variable axial piston pumps through flow pulsation resource putting forward a method to reduce the reduction of pressure pulsation and the test result of a pump .

分析了 变量轴向柱塞泵的流量特性，从该类泵 流量脉动源出发，提出了减少泵压力脉动双幅值误差的方法.给出了该类泵减小压力脉动的数学模型及某 泵的试验结果。

Developing Technical of Variable Shift Speed so as to Realize Variable of Flow Adjust of Water Pump

实现 水泵 变 流量调节发展水泵变转速技术

Again at cold and hot medium transport aspect variable flow system is potential bigness in energy saving compare with constant flow system and primary pump system in variable flow the movement is higher the efficiency .

另外，通过对冷热介质在输送过程中的分析比较分析得出 变 流量系统节能潜力巨大，而且一次 泵系统变流量在运行中效率更高。

A general scheme of a high pressure variable flow and variable pressure aircraft intelligent hydraulic pump system is proposed in this paper .

提出了一种高压 变 流量变压力机载智能 泵 源系统的总体方案。

Ltd. as an example compares the energy consumption between primary pump and primary-secondary pump systems with variable flow rate . The result shows that the electricity consumption of primary pump system is only 68 % of that of the primary-secondary pump system .

以上海通用汽车有限公司制冷站为例，比较了一次泵和二次泵 变 流量系统的能耗，结果表明，一次 泵系统的耗电量仅为二次泵系统的68%。

Taking a rotor shape parameter as a variable the minimum volumes of rotor cavity and pump flow as the design objectives as well as some constraints on rotors and gears cavity structures an optimization design model of un-contact rotor pump was constructed .

以转子形状参数为 变量，以 流量和转子腔体积最小为设计目标，考虑齿轮腔和转子腔结构的有关约束，建立了非接触式转子 泵的优化设计模型，给出了优化设计步骤。

In this paper it analysised the application conditions of pump similarity against the variable flow pump system compared the pump energy consumption in different forms of control and does energy consumption and economic comparison between the fist pump system and the secondary pump system .

本文针对 变 流量系统进行了水泵相似律应用条件的分析，水泵转速不同控制方式的能耗比较，以及一次泵系统与二次泵系统的能耗和经济性比较。

The heat-supply system with distributed variable frequency pump is a heat-supply system in which the flow rate is regulated with return-water pressured pump instead of valve set at return water pipe on the high-temperature side of heat exchange in substation .

分布式 变频泵供热系统是指在热力站换热器一次侧回水管上设置回水加压 泵，代替阀门完成 流量调节的供热系统。

A system design of a miniature variable flow electromagnetic pump based on pressure control

基于调压的微小型 变 流量电磁 泵控制系统设计

A Method to Reduce Noice of Variable Flow Pump

降低 变量 叶片 泵噪声的方法

With velocity moment V_ur as the command variable the shape of blade is developed by iterating computation of positive and inverse question which ensures full coincidence of blade shape with real flow status through the impeller and creation of a mixed-flow pump with good performance .

以速度矩Vur为控制 变量，通过正反问题迭代计算从而构制出叶片，力求使叶轮叶片形状与叶轮 内实际 流态相吻合，从而得到性能优异的混流 泵。

Factors Affecting by-pass Flow rate of Variable Flow Rate System With Single Pump

单式 泵 变 流量系统旁通流量的影响因素

By calculating presents that the variable flow system can save energy efficiently when the energy consumption proportion of pump to the whole water system of air conditioning is more than 20 % .

通过计算得出了 水泵能耗占 空调 水系统总能耗20%以上时可以达到节能效果。

Analyses and confirms the practicability of variable water flow operation for the primary pump system and illustrates its obvious energy saving effects .

分析了一级 泵系统实现 变 流量运行的可行性，并通过实例说明了其显著的节能效果。

So it is necessary to study the variable rules of flow and advance method to forecast flow of individual pump and the system in order to determine the regulating method systems design and equipment choosing and instruct system operation .

研究 调节过程中，单机 流量 的 变化规律，提出单机 流量和系统流量的预测方法，对于这种调节方式的决策，对于设备选型、系统设计以及运行指导是很有意义的。

Based on the incompressible primitive variable Navier Stokes equations a numerical method was employed to simulate successfully the axis symmetric flow field of jet pump . The iterative and time matching algorithms of Galerkin finite element method and Baldwin Lomax two layer algebraic turbulent model were used .

以原 参数形式的Navier-Stokes方程为基础，采用Galerkin有限元迭代解法和时间推进解法，在Baldwin-Lomax二层代数湍流模型下，对射流 泵内部轴对称 流场进行数值模拟。

Variable Angle adjustment from the structure the axial flow pump impeller with enormous wheels easy to install adjustable angle blade .

变角调节从构造来看，轴 流 泵叶轮具有巨大的轮毂，便于安装可调角度的叶片。

In this paper the control strategies of variable flow in secondary pump system and primary pump system in air conditioning were also discussed .

本文还探讨了空调二次 泵系统和一次泵系统 变 流量的控制策略。

Variable vane pump is used as flow control element in the system whereas two electrohydraulic proportional valveacts as leading valve controlling the eccentricity of the vane pump .

系统使用 变量叶片泵作为 流量控制元件，使用两个电液比例阀作为先导阀控制叶片 泵的偏心量。

Discussion on variable flow energy saving control of water-loop heat pump air conditioning water system

水环 热泵空调水系统 变 流量节能控制探讨空调一次 泵变频系统运行特点及设计重点