MULTIPHASE SCREW PUMP Russian patent published in 2010 - IPC F04C2/16 

FIELD: engines and pumps.

SUBSTANCE: multiphase screw pump comprises housing 1 accommodating coupled screw rotors fitted in cylindrical grooves 2, 3 to revolve therein. Said rotors form, between groves surfaces and inner spaces of rifling, a number of closed pressure chambers 6, 7 to force work medium along rotors axes from inlet to outlet. Suction space 10 is arranged at rotors inlet and communicated with suction branch pipe 8 of housing 1, while pressure space 11 is arranged at rotors outlet communicated with pressure branch pipe 9. Said pressure chamber accommodates crosswise baffle separating pressure chambers 17 at rotors outlet. Said baffle has opening 18 arranged in screws convergence zone, when screws revolves in opposite direction, and communicating pressure space with pressure chambers 17 when their volume decreases.

EFFECT: higher efficiency in compressing gas-fluid media with increased content of gas fraction reached by using pump in compressor mode.

4 cl, 4 dwg