1) stopped pumping water hammer calculation
停泵水锤计算
2) pump-stopping water hammer
停泵水锤
1.
In light of the harm of water hammer in building water-supply system,the author introduces the causes of water hammer,analyzes the theoretical calculation of water hammer s pressure changing value,and proposes the measures should be adopted to avoid the damage from pump-stopping water hammer,in order to increase safe reliability of water hammer protection functions of building water-supply system.
针对建筑给水系统的水锤危害,介绍了水锤现象产生的原因,分析了水锤增压值的理论计算,提出了避免停泵水锤危害应采取的措施,以提高建筑给水系统水锤防护功能的安全可靠性。
3) pump-failure water-hammer
停泵水锤
1.
<Abstrcat> A simple and practical direct alternative format for calculation of the characteristic line equations and boundary condition equations of pump-failure water-hammer were proposed.
对停泵水锤数值计算的特征线方程和边界条件方程,设计了一种简单实用的直接迭代格式,编写了计算软件。
2.
The basic numerical calculation theory for pump-failure water-hammer was researched systematically in this paper.
较系统地研究了水泵站停泵水锤数值计算概念模型。
4) water hammer calculation
水锤计算
5) numerical simulation of water hammer caused by stopped pumping
停泵水锤数值模拟
1.
This paper analyzes how control valve in the multi-function pump simulate its closure process in the numerical simulation of water hammer caused by stopped pumping on the basis of numerical simulation of water hammer caused by stopped pumping.
文章从停泵水锤数值模拟的角度,分析了多功能水泵控制阀在停泵水锤数值模拟中如何模拟其关闭过程。
6) hydraulic ram
水锤泵
1.
Application of hydraulic ram technology in mountainous rural area;
水锤泵技术在山区农村的应用
2.
This study was aimed to optimize the ratio of length of in water pipe and water head, the results show that when the ratio is 4∶1～6∶1, the installation material and the expenditure can be reduced and the capacity of dilivery water by hydraulic ram can also be increased.
该文针对水锤泵安装使用中存在的进水管费用太高，进水池水位高度无一定标准等问题，对安装系统中的进水管长度与水落差比（通常为８∶１），水位高度等技术参数进行了优化调整。
3.
This paper describes the working principle of the hydraulic rams, and emphases on the installation site selection, operation frequency adjustment and necessary measure for avoiding the frozen in winters and block in the operation.
本文论述了水锤泵技术的工作原理、安装要点和频率调节、防冻、防堵等运行管理以及在松阳县的应用实例。
补充资料：水锤泵
利用流动中的水被突然制动时所产生的能量，使其中一部分水压升到一定高度的一种泵。图为水锤泵的工作示意。沿进水管向下流动的水流至单向阀A(静重负载阀)附近时,水流冲力（只要流动速度足够大，就有足够的冲力）使阀迅速关闭。水流突然停止流动，水流的动能即转换成压力能，于是管内水的压力升高,将单向阀B 冲开,一部分水即进入空气室中并沿出水管上升到一定的高度。随后，由于进水管中压力降低，阀A在静重作用下自动落下,回复到开启状态。同时空气室中的压缩空气促使阀 B关闭，整个过程遂又重复进行。利用水锤泵可以使进水管中流动的水大约15％压升到相当于5倍进水管落差的高度。水锤泵的效率η＝ε·嗞。式中嗞为压升水流量与向下流动的工作水流量之比；ε为压升高度加上出水管中损失水头与工作水落差之比。好的水锤泵效率可达86％。进水管的安装倾斜度在1:9至1:4的范围内，以便使水流制动效果最好。水锤泵没有运动的工作元件，结构简单，而且不需要外部动力源，也无须专人看管。设计泵时须考虑泵构件的强度，避免因水锤作用而破裂。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条