辛安泵站供水工程停泵水锤计算与防护研究  

Study on Protection and Pump-stopping Water Hammer Calculation of Water Supply Project for Xin'an Pump Station

作　　者：王丽 吴建华[1] 杨德明[1] 高洁[1] 刘亚明[1] 

机构地区：[1]太原理工大学水利科学与工程学院,山西太原030024

出　　处：《水电能源科学》2018年第1期168-171,共4页Water Resources and Power

基　　金：山西省国际科技合作项目(201603D421011);山西省社会发展科技攻关计划项目(20140313023-4)

摘　　要：以辛安泵站供水工程停泵水锤为例,采用数值模拟的方法计算泵站4台机组并联运行工况下的管路的压力状况,发现4台机组并联运行工况下发生停泵水锤时管路正负压及水泵最大倒转转速不满足泵站规范要求,提出了安装两阶段液控蝶阀、增加进排气阀、增大机组转动惯量3种防护措施保证供水系统安全运行并进行数值模拟计算。结果表明,仅安装两阶段液控蝶阀时,管路最大正压、水泵最大倒转转速可满足规范要求,但管路负压仍不满足规范要求;两阶段液控蝶阀加进排气阀联合防护时,可有效改善管路负压问题,但仍不满足规范要求;两阶段液控蝶阀加进排气阀并提高机组转动惯量10%联合防护措施时,可有效改善管路正负压问题及水泵最大倒转转速,且辛安泵站可以安全运行。Taking the pump-stopping water hammer of water supply project in Xin＇ an pump station as an example, numerical simulation was used to calculate the pressure fluctuation of the pipeline under the parallel operation of four units in the pump station. It is found that at the pump-stopping water hammer under the parallel operation of the four units, the positive and negative pressure of the pipe and the maximum reverse rotation speed of the pump do not meet the re- quirements of the pump station. Three kinds of protective measures, such as installing the two-stage liquid-controlled butterfly valve, increasing the intake and exhaust valves and increasing the unit moment of inertia, were put forward to ensure the safe operation of water supply system. Numerical simulation calculation was carried out. The results show that when only two-stage pilot butterfly valve is installed, the maximum positive pressure of the pipeline and the maxi- mum reverse rotation speed of the pump can meet the specifications, but the negative pressure of the pipeline still does not meet the standard requirements. On this basis, increasing 10% unit inertia can effectively improve the pipeline posi- tive and negative pressure problems and the maximum reverse rotation speed, and Xin＇an pump station can .be safe operation.

关 键 词：辛安泵站 供水工程 停泵水锤计算 防护 

分 类 号：TV674[水利工程—水利水电工程]