水力发电学报2012，Vol.31Issue(3)：209-216,8.
泵段、水泵模型测试段与泵段效率修正
Pump segment,model pump test section and pump segment efficiency modification
徐磊 1陆林广 1王刚 1董雷 1梁金栋1
作者信息
- 1. 扬州大学水利科学与工程学院,江苏扬州225009
- 折叠
摘要
Abstract
Pump segment（PS） is redefined to meet the requirements on hydraulic design of flow passages of large-size low-head pump system,and PS efficiency is modified by the measured head losses in the inlet and outlet pipes of model pump.By the modified efficiency,calculation is made to verify the relationship between PS efficiency,conduit efficiency and pump system efficiency for three pump stations on the eastern route of south-to-north water diversion（SNWD）.Results indicate that PS should be defined as two basic components,pump impeller and guide vane.The integrated characteristic curves provided by a model pump test on the same test stand as the SNWD model pumps,represents the hydraulic performance of model pump test section（MPTS） including the head losses in the inlet and outlet pipes of test section,and thus the PS performance of a large pump system should be modified to account for the head losses in the inlet and outlet pipes of MPTS.As both the modified values of head and efficiency of a PS are greater than those of MPTS,head modification is roughly 0.15m under the design flow rate.Efficiency modification in the range of 1-4% depends on the head of MPTS,with greater modification for lower head cases.Conduit efficiency is calculated using conduit loss and pump head.By using this efficiency and modified PS efficiency,the pump system efficiency of design condition may be estimated.The difference between such an estimation and the tested value is usually less than 1%.关键词
水力机械/泵段/水泵模型测试段/水力损失/效率修正Key words
hydraulic machinery/pump segment/model pump test section/hydraulic loss/efficiency modification分类
建筑与水利引用本文复制引用
徐磊,陆林广,王刚,董雷,梁金栋..泵段、水泵模型测试段与泵段效率修正[J].水力发电学报,2012,31(3):209-216,8.
