The influence of the change of centrifugal pump rotating speed on the efficiency of the whole pump-unit which due to the variation of the pump efficiency and pipeline efficiency is studied.
讨论了离心泵的运行转速改变后，由于泵效率和管路效率的变化而给整个果装置效率带来的影响，由此可以判断离心泵改变转速后，泵装置的运行是否合理，并可确定泵装置运行的最佳转速范围。
The base shall be of adequate height to provide suitable clearance between the pump suction elbow and the mounting floor and of sufficient strength to accept all forces imposed by the pump unit.
这个基座应该具有适当的高度，使得泵吸入弯头与安装地面具有适当的间隙，并有足够的强度承受泵设备所产生的所有压力。
Through piping model test and pump unit trial it is shown that with the two types of isolating shims the vibration acceleration of the piping system can be reduced evidently.
经管路模型试验和水泵机组试验证明，这两种隔振垫可使管路系统振动加速度级明显下降。
The characteristics of centrifugal pump unit given by pump specimen are obtained by testing with water.
泵样本上给出的离心泵组的特性都是用水试验得出的。
The maintainability of large pump unit influences the maintenance time, maintenance expense, and maintenance quality directly.
大型水泵机组的维修性直接影响维修时间、维修质量和维修费用。
Pump unit is widely used in industrial and mining enterprises, urban construction, fire safety, environmental protection, farmland irrigation, landscape irrigation, and other aspects.
水泵机组广泛用于工矿企业、城市建设、消防安全、环境保护、农田排灌、园林喷灌等多方面。
In recent years, is committed to water, ground source, air source heat pump unit development and use.
近年来致力于水源、地源、空气源热泵机组开发和利用。
The dynamic system model is coupled with geothermal heat exchanger model and heat pump unit model, which is based on the conservation of mass and energy.
采用确定性模型法建立了热泵机组的模型，然后通过能量和质量守衡方程序建立了系统动态耦合模型。
The authors point out that only after selecting rational operating mode and control mode of pump unit can the safe and steady operation of pipeline be ensured.
提出只有选择工艺合理的泵机组运行方式和控制方式，才能实现成品油管道的安全平稳运行。
The experiments for different airflow were conducted on an air-to-water heat pump unit and discussed.
采用试验方法研究了风量变化对中大型风冷热泵机组结霜工况性能的影响。
Foreign advanced pump unit, efficiency can exceed 90%.
国外先进的水泵机组，效率可超过90%。
Therefore to understand a single pump or more transmission characteristics of the noise, heat pump unit base to explore ways to control noise, has a practical significance in general.
因此了解单台或多台热泵的噪声传播特性，探讨热泵机组群噪声防治的方法，具有一定的普遍现实意义。
Results are significant to reasonable design and selection of large step pump stations, structures and functions of pump unit equipments.
成果对大型梯级泵站形式和机组设备结构功能的合理设计选型有重大意义。
The results show that guide bearing load of large vertical water pump has something to do with inlet passage of pump station, pump unit manufacture and installation quality, structure pattern.
研究结果表明：大型立式水泵导轴承荷载与进水流道和机组制造安装质量、结构形式有关。
Based on the characteristics of pump assembly, the influences of hydraulic resistance of trash rack and feculence on pump unit operation are investigated.
根据水泵装置特性研究了拦污栅及其污物阻水对泵机组运行的影响。
Presents main reasons of the compressor damaged in winter by analyzing an accident of the wind cooling heat - pump unit. Gives some Suggestions for the user and the producer.
通过对一起风冷热泵机组压缩机损坏事故的分析，提出机组冬季损坏的主要原因，并提出一些意见和建议供用户和生产厂家参考。
Imersion oil electric pump unit is a kind of oil jack with rodless deep extraction, large discharge capacity and high lift.
潜油电泵机组是一种无杆深抽、排量大、扬程高的抽油设备。
Result calculated by the mathematics model indicates that pipeline capacity decreases as the length of pipeline increases and reliability of pump unit reduces.
该数学模型计算的结果表明，管道的输送能力随泵机组可靠度的降低和管道长度的增加而减小。
This paper presents associated technology design and application of a dredge pump unit in the rehabilitation project in Cline Shipyard, Sierra Leone.
在塞拉利昂克莱恩船厂滑道改建工程中，对吸泥泵组的配套工艺设计及使用情况作以介绍。
The circulating pump unit can measure the return water temperature and determine whether to start the circulating pump.
循环泵装置可测量回收到的循环水温度，而且根据测量的温度决定是否启动循环泵。
The cause for the vibration of the pump unit was discussed.
针对泵机组的各部件存在的振动，分析了产生振动的原因。
This paper introduced a new type and special structured vacuum pump unit suitable for dry type reduced-pressure distillation.
本文介绍适用于干式减压蒸馏的特殊结构真空抽气设备。
Centrifugal pumps are used usually as pump unit in crude oil transportation engineering.
在原油输送工程中，常用离心泵作为原油输送泵组。
Heat pump unit has been widely used both at home and abroad for its characteristics of economy and energy saving.
热泵机组以其明显的节能意义和经济价值在国内得到了广泛的应用。
This paper presents the principle of MDV system and explains its advantages in architecture energy saving through comparing with air-cooled heat pump unit in operation economy.
本文阐述了MDV系统的原理，通过与风冷热泵机组在运行经济性方面的比较，充分说明了MDV系统在建筑空调中的优势。
So it cannot accurately show the property of gasoline pump unit.
这就不能准确地反映机组性能。
When repairing the pump unit, install the plug attached to the service part to prevent ink from spilling.
当修理泵部件时，要安装泵的附件，以防止墨水泄漏。
The differential equation of pump station start-up transient is established and derived from discharge balance and moment equation of pump unit.
本文从水量平衡及水泵机组力矩方程出发，建立起水泵从起动到同步的微分方程序。
But all this depend on the steady, safe and highly efficient running of ground source heat pump unit.
但是，这又依赖于热泵机组的稳定、安全、可靠、高效的运行。
But all this depend on the steady, safe and highly efficient running of ground source heat pump unit.
但是，这又依赖于热泵机组的稳定、安全、可靠、高效的运行。
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