Abstract：Linjiaba Pump Station is the first station which adopts large-scale gear-driven bulb tubular pump set.In order to obtain optimum hydraulic performance of the pump set,its hydraulic loss was calculated by Computational Fluid Dynamics(CFD),and the results were compared with the model pump set test.The structures of bulb tubular pump supports,vane angle adjustment,main shaft seal apparatus,bearing arrangement,gearbox and synchronous motor were analyzed.The conclusion indicates that,the testing efficiency of the model pump set is 78%,the cavitation characteristic is fine at the net head(2.4 m) of pump station,and its hydraulic performances reach the index of the eastern route project of the South-to-North Water Diversion.The application of large-scale gear-driven bulb tubular pump set provides reference for type selection,design and manufacture of other pump stations of low lift and large flow capacity.
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