Speed Regulation Performance and Test of Large Bidirectional Pump Device for Xinchuansha Pump and Sluice
The performance of the pump device in bidirectional operating conditions is need to be balanced in the pum-ping station which has low head,large flow and large head difference between water diversion and drainage.The perform-ance and operation mode adaptability of the pump devices suitable for the pumping station is necessary to be studied.Tak-ing Xinchuansha Pump and Sluice Hub Project,the bidirectional shaft tubular pump station with the largest water diver-sion scale till now in China,as the research object,the design and adjustment of pump units have been studied.The de-sign net heads of the pump station under the water diversion and drainage conditions are 0.68 m and 2.79 m,respective-ly.The improvement degree of pump characteristic under different regulation modes has been compared and analyzed.The rationality of the pump design has been verified by CFD numerical simulation and device model test.And the per-formance of the pump device at different speeds has been tested.In terms of performance regulation,the adjustment effect of variable frequency speed regulation is better than that of blade adjustment,and it is more suitable for various working conditions.The overall efficiency of the pump device decreases when the rotational speed decreases.But when the speed is reduced to 0.8 times the rated speed,the efficiency of the high efficiency zone only decreases by about 1%.According to the result of pump performance test,the control scheme of variable speed operation in different head ranges is proposed.It provides reference for the selection of pump type and the adjustment mode of operation in large bidirection-al pump stations in the future.
bidirectional shaft tubular pumphead differencevariable frequency speed regulationhydraulic per-formancemodel test
万方数据
维普
