高扬程长爬坡泵系统水锤的防护  

Water hammer protection of pump system with high head and long climb

作　　者：梁兴[1] 李燕[1] 刘梅清[2] 王云龙 崔世杰 LIANG Xing;LI Yan;LIU Meiqing;WANG Yunlong;CUI Shijie(Nanchang Key Laboratory of Low Grade Energy Conversion and Systematic Energy Saving Technology,Nanchang Institute of Techno-logy,Nanchang,Jiangxi 330099,China;School of Power and Mechanical Engineering,Wuhan University,Wuhan,Hubei 430072,China)

机构地区：[1]南昌工程学院南昌市低品位能源转化与系统节能技术重点实验室,江西南昌330099 [2]武汉大学动力与机械学院,湖北武汉430072

出　　处：《排灌机械工程学报》2023年第12期1232-1236,1282,共6页Journal of Drainage and Irrigation Machinery Engineering

基　　金：国家自然科学基金资助项目(51969017);江西省教育厅科技项目(GJJ211941)。

摘　　要：针对“高扬程、长爬坡”输水系统事故停泵水锤防护问题,以某供水工程为例,基于特征线算法,分析单向调压塔、空气罐、空气阀等不同水锤防护措施联合下的过渡过程特性,重点探讨了空气罐的水锤防护特点.结果表明:在泵后布置空气罐能在爬坡段有效提高最小水锤压力,且随着空气罐体积增加,水泵倒转转速虽略有增加,但总体水锤防护效果较好;单向调压塔对安装点之后高程低于塔内水位的管线保护作用较强,对安装点之前爬坡管线几乎无保护作用;采用以空气罐-单向调压塔-空气阀相结合可以有效减小空气罐体积,最优方案下最大水锤压力为348.98 m,最小水锤压力为-2.87 m,满足水锤防护要求;对“高扬程、长爬坡”的泵系统,以空气罐为主进行联合水锤防护是一种安全、经济的防护方案.In view of the water hammer protection problem of accidental pump showdown in″high head and long climb″water delivery systems,by taking a water supply project as an example,the transition process characteristics of different water hammer protection measures such as one-way surge tank,air tank and air valve were analyzed based on the characteristic line algorithm,and the water hammer protection characteristics of air tank were focused on.The results show that the arrangement of air tank after the pump can effectively raise the minimum water hammer pressure in the climbing section,and as the volume of the air tank increases,the overall water hammer protection effect improves greatly,although the reverse rotation speed of the pump increases slightly.The one-way pressure regulating tank has a strong protective effect on pipelines when elevation is lower than the water level in the tank after the installation point,but has almost no protective effect on the climbing pipelines before the installation point.The combined water hammer protection measures based on air tanks,one-way surge tank and air valves are adopted,for which the maximum water hammer pressure under optimal solution is 348.98 m and the minimum water hammer pressure is-2.87 m,which meets the water hammer protection requirements.For pump systems with"high head and long climb",a combined water hammer protection using air tanks is a safe and economic protection scheme.

关 键 词：事故停泵 水锤 空气罐 单向调压塔 

分 类 号：TV134.1[水利工程—水力学及河流动力学]