MULTI-STAGE IMPELLER PUMP FOR OPERATION ON GAS-LIQUID MIXTURE WITH INCREASED GAS CONTENT (VERSIONS) Russian patent published in 2012 - IPC F04D1/06 F04D13/10 F04D31/00 

FIELD: engines and pumps.

SUBSTANCE: pump consists of packs of stages of impellers and guide vanes of various type. Impellers of stages are put on shafts with possibility of being rotated together with them. Pack of stages with radial guide vanes is installed at pump inlet before pack of stages with axial-radial guide vanes. According to the other design version, stages with axial-radial guide vanes equipped with additional vanes arranged on internal walls of the housing are installed at the pump inlet before stages with axial-radial guide vanes having flat surfaces of the housing walls.

EFFECT: invention improves stability of multi-stage impeller pump operation on gas-liquid mixture.

2 cl, 5 dwg