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装置扬程
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  unit head
     On the base of real instance, the Transducer Velometer is recommended in large scale pump station and those of large energy waste and unit head change.
     依据实例提出:对于大型泵站和耗电量大且装置扬程变化较大的泵站最好采用变频调速。
短句来源
  “装置扬程”译为未确定词的双语例句
     Based on similarity theory and expressions of water head and efficiency curves of pumps and pump sets,a mathematical model for predicting water head and efficiency of prototype pumps and pumping sets is put forward.
     根据相似理论,分析和表达了模型泵及泵装置扬程特性曲线和效率特性曲线,提出了预测原型泵及泵装置扬程特性和效率特性的数学模型,作为泵站技术改造水泵选型预测的理论依据;
短句来源
     In order to grasp synchronous motor starting process in the large-scale bulb type tubular pumping station, the parameter of dynamic capacity, equipment lifts, voltage, current, rotational speed along with the starts process time, the starting process theory of pump set was detailed analyzes and the simulation computation was carried on.
     为掌握大型贯流泵站同步电动机起动过程中水泵动态流量、装置扬程等水力量及同步电动机的起动电压、起动电流、机组转速等电气量、机械量参数随机组起动历时的变化过程,对贯流泵机组起动过程进行了详细的理论分析并进行了仿真计算。
短句来源
  相似匹配句对
     Determination of the Pumping Installation Characteristic
     低扬程装置性能的决定因素
短句来源
     Study on a Low lift and Two way Pumping System
     低扬程双向流道泵装置研究
短句来源
     What's Dada?
     什么是装置?
短句来源
     Autotransfusion Units
     自身输血装置
短句来源
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  unit head
After several meetings in which the peers advised the unit head's team, the unit bought three tankers and took options on another three.
      
Cook>amp;1980, Journal of Occuoational Scopeof Changequestions If you arein a msition or are a unit head, pleasecompletethe following.
      
Each department or unit head is required to facilitate the review process.
      
Each unit head reports directly to the Vice Chancellor Business and Administrative Services.
      
Each clinical diagnosis was associated in the developed software with a set of best practice pathology tests selected by the clinical unit head.
      
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As one of the imported valves in axial pumping stations, the moment characteristics of flap valve is related to hydraulic transient of turbine, time dependent flow of pipe system and dynamic characteristics of hydraulic hoist. Combined with the flap valve model test of Fankou pumping station, the simulation method of flap valve and hydraulic hoist model are introduced, the dynamic characteristics of two different schemes with variant pumping head is tested and studied. With computer measure system,dynamic parameter...

As one of the imported valves in axial pumping stations, the moment characteristics of flap valve is related to hydraulic transient of turbine, time dependent flow of pipe system and dynamic characteristics of hydraulic hoist. Combined with the flap valve model test of Fankou pumping station, the simulation method of flap valve and hydraulic hoist model are introduced, the dynamic characteristics of two different schemes with variant pumping head is tested and studied. With computer measure system,dynamic parameter and dash power of flap valve and change course of oil pressure in hydraulic buffer are obtained. It can be shown that suitable channel square with section change can realize reliable cushion and eliminate bump force. The results not only provides the necessary basis for flap valve reconstruction of Fankou pumping station, they also has the function of guiding and referring for the similar flap valve and hydraulic buffer.

拍门是轴流泵站主要截流闭锁装置之一,其动态特性与泵装置停泵过渡过程中泵机组动力学特性、管路系统瞬交流及液压启闭机构动态特性等有关。文中结合湖北樊口泵站大型拍门模型试验,介绍了拍门及液压启闭系统模型相似设计方法,运用微机动态测试系统实测了不同装置扬程下两种不同渐变缓冲方案的拍门动态参数及启闭机油缸内压力变化过程,根据模型试验结果合理确定了樊口泵站拍门技术改造中截流渐变回油口槽道面积方案。该研究成果不仅为樊口泵站拍门技术改造提供依据,同时也对同类截流闭锁装置设计、改造具有参考价值。

Combined with the flap valve model test of Fankou pumping station, the simulant method of flap valve and hydraulic hoist model is introduced and dynamic characteristics of two different schemes with variant pumping head is tested and studied. With computer measure system,dynamic parameters and dash power of flap valve and change course of oil pressure in hydraulic buffer are given. From the study, it can be shown that suitable channel square with section change can realize reliable cushion and eliminate bump...

Combined with the flap valve model test of Fankou pumping station, the simulant method of flap valve and hydraulic hoist model is introduced and dynamic characteristics of two different schemes with variant pumping head is tested and studied. With computer measure system,dynamic parameters and dash power of flap valve and change course of oil pressure in hydraulic buffer are given. From the study, it can be shown that suitable channel square with section change can realize reliable cushion and eliminate bump force. The results not only have provided the necessary basis for flap valve reconstruction of Fankou pumping station, but also have the function of guiding and referring for the similar flap valve and hydraulic buffer.

结合湖北樊口泵站大型拍门模型试验 ,介绍了拍门及液压启闭系统模型相似设计方法 ;运用微机动态测试系统实测了不同装置扬程下两种不同渐变缓冲方案的拍门动态参数及启闭机油缸内压力变化过程 ,根据模型试验结果合理确定了樊口泵站拍门技术改造中截流渐变回油口槽道面积方案

The continuum functional relationships among system efficiency, blade angle, static head and flow rate of pumps are established based on the performance curve surface fitting method. According to these functional relationships the pumping station efficiency and other parameters under certain static head and flow rate can be determined quickly and accurately. Since no interpolation is needed, it accelerates the calculation for seeking optimized operation scheme and improves the calculation precision. Furthermore,...

The continuum functional relationships among system efficiency, blade angle, static head and flow rate of pumps are established based on the performance curve surface fitting method. According to these functional relationships the pumping station efficiency and other parameters under certain static head and flow rate can be determined quickly and accurately. Since no interpolation is needed, it accelerates the calculation for seeking optimized operation scheme and improves the calculation precision. Furthermore, the optimized dispatch scheme of the pumping station is obtained by adopting the dynamic planning method. This method is suitable to the pumping stations having various types of pumps with adjustable blade angle and rotational speed. An example of application is given. The result shows that the optimized operation scheme not only save a lot of electric power but also accelerate the calculation speed.

本文基于曲面拟合构造了装置效率、叶片角度与装置扬程和流量的连续函数关系,可以迅速准确地确定某一装置扬程和流量所对应的装置效率等参数。由于不需要反复插值计算,可以大大提高寻优计算的速度和精度。进而本文利用动态规划建立了泵站优化调度模型,可用于考虑时间因素、具有多种型号泵且能调角或调速运行的泵站优化调度。为了检验本方法,特对某泵站进行了优化调度。结果表明,优化后的方案比现有运行方案要节省大量电费。

 
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