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

FIELD: engines and pumps.

SUBSTANCE: invention relates to screw pump. Screw pump having single-flow two-shaft design includes two screws (1, 2) and housing (3) enclosing screws (1, 2) so that delivery chambers (4) are formed, which are restricted with its inner side surface, as well as suction chamber (5) for suction medium and compression chamber (6) for collection of the medium pumped with screws (1, 2). Housing (3) of pump is installed in compression chamber (6) and fixed in it so that compressed chamber (6) at least partially encloses housing (3) of pump. Both screws (1, 2) are installed with external bearing assembly. In compression chamber (6) there provided are separation devices for separation of pumped multi-phase mixture into gaseous and liquid phases. Between compression chamber (6) and suction chamber (5) there provided is short-closed pipeline (13) for supply of separated liquid back to suction chamber (5).

EFFECT: development of the pump the manufacture and maintenance of which could be cheap, and which could be applicable for pumping of multi-phase mixtures within the operation range of separate sources.

14 cl, 1 dwg