Open AccessPhysical model experimental analysis of bidirectional shaft tubular pump device
Author(s) -
Ye Yuan,
Y Q Zhang,
Xingyu Xu,
Fan Yang
Publication year - 2020
Publication title -
iop conference series. earth and environmental science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.179
H-Index - 26
eISSN - 1755-1307
pISSN - 1755-1315
DOI - 10.1088/1755-1315/612/1/012053
Subject(s) - npsh , head (geology) , axial flow pump , cavitation , mechanics , flow (mathematics) , variable displacement pump , centrifugal pump , axial piston pump , progressive cavity pump , impeller , rotodynamic pump , vortex , engineering , radial piston pump , reciprocating pump , physics , geology , geomorphology
Based on the two-way cross flow pump station of Dingbo water conservancy project in Jiangyin City, the energy characteristics, cavitation characteristics and runaway characteristics of the model device of the two-way shaft cross flow pump are tested, and the performance test data of the two-way shaft cross flow pump device in the forward and reverse operation are obtained. The results show that the flow pattern of the two-way cross flow pump is stable without vortex and the operation of the pump is stable. When the blade angle is - 4 °, the physical model efficiency of the two-way Shaft Tubular pump is 70.95% under the condition of 3.05 m forward design head and 57.39% under the condition of 1.43 m reverse design head; the cavitation performance of the pump near the forward and reverse design heads is the best, and the critical necessary NPSH is less than 8 m. When the maximum positive net head is 2.99 m, the maximum runaway speed of the prototype pump is 1.50 times of the rated speed of the pump; when the maximum negative net head is 2.57 m, the maximum runaway speed of the prototype pump is 1.13 times of the rated speed of the pump; the smaller the blade angle, the higher the unit runaway speed.