Influence of rotating speed change to the performance of centrifugal pump
PEI Yi1, TIAN Li2, YANG Xiao-zhen1, SHI San-ming2
1.College of Engineering, Hunan Agricultural University, Changsha, Hunan 410128, China; 2.Central South University of Forestry and Technology, Changsha, Hunan 410004, China
Abstract：The rotating speed has an influence on the pump performance.The operating point of centrifugal pump is affected by the characteristics of both pumps pipelines.By changing the rotating speed of pump in both open and closed pipelines,together with experimental data and calculated results for 50-160 type pumps,the effects of power are studied in detail.The effects of energy saving of variable speed pumps in the closed circuit are different from those in the open pipeline system.The reason is that there is a static head in the open system causing the pump efficiency varying.The energy saving effects of variable speed pumps in open systems are discussed and calculation examples are provided.According to the calculated result of 50-160 type pumps,the pump power in closed system is 76.47% of that in open system.
裴毅；田莉；杨晓珍；石三铭. 转速变化对离心泵性能的影响[J]. 排灌机械工程学报, 2007, 25(4): 9-13.
PEI Yi, TIAN Li, YANG Xiao-zhen, SHI San-ming. Influence of rotating speed change to the performance of centrifugal pump. Journal of Drainage and Irrigation Machinery Engin, 2007, 25(4): 9-13.
