摘要
轴流泵叶轮选型不当会导致泵站运行工况的偏离,降低使用效率,增大机组振动,影响泵站的高效、安全和稳定运行,合理地进行轴流泵叶轮的选型,对轴流泵的运行具有实际意义。以立式轴流泵模型试验为基础,分析了轴流泵叶轮的选型办法,在传统选型办法基础上增加了以泵站的流量加权平均值、效率加权平均值和临界汽蚀余量加权平均值作为参考的泵站选型办法,可以更加合理地优选出适合泵站运行的水泵叶轮。优选出方案3叶轮,此时泵装置在叶片安放角6°时,流量为398.5 L/s,扬程为6.07 m,效率达到75.5%,临界汽蚀余量达到7.4 m,设计点性能最优,高效区较宽,同时泵装置流量加权平均值为414.25 L/s,效率加权平均值为71.385%,临界汽蚀余量加权平均值为8.435 m,综合性能最优。
The selection of impeller of axial flow pump has a direct impact on the flow,head,and efficiency of the pump device; whether the impeller matches the actual working conditions of the axial flow pump device is the most important part as far as the design and energy saving are concerned.The improper selection could result in deviation of operating conditions of pump,the reduction of service efficiency,and the increase of unit vibration; consequently further influenced the efficiency,safety and stable operation of the pump station.Thus it is of great significance to choose a proper type of impeller for the operation of axial flow pump.Based on the vertical axial flow pump model test,the method of selection of pump impeller was analyzed; on the basis of the traditional method,the method with reference to the weighted average flow rate,weighted average efficiency and weighted average NPSH of the pump station was added.Finally,test program 3 was chosen： the blade placement angle was 6°,the flow rate was 398.5 L/s,the head was 6.07 m,the efficiency was 75.5%,the NPSH was 7.4 m,the performance was the optimal at design points,the high efficiency area was wide,the weighted average flow rate was 414.25 L/s,the weighted efficiency was 71.385%,the weighted average NPSH was8.435 m,and the overall performance was the best.The chosen program 3,given the guaranteed design parameters of the pump device,can give full play to the pump more effectively and generate greater economic and social benefits,thus providing reference for future similar projects.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2017年第6期94-99,131,共7页
Transactions of the Chinese Society for Agricultural Machinery
基金
国家自然科学基金项目(51376155
51609210)
中国博士后科学基金项目(2016M591932)
江苏高校优势学科建设工程项目(PAPD)
江苏省科研创新计划项目(KYZZ16_0492)
关键词
立式轴流泵
叶轮
泵站
选型
模型试验
vertical axial flow pump
impeller
pumping station
selection
model test
