TURBOPUMP FOR TWO FLUIDS Russian patent published in 2014 - IPC F04D13/04 B01F7/26 

FIELD: engines and pumps.

SUBSTANCE: turbopump comprises housing (4) with working chamber (9), shaft (7) with external drive, impeller fitted on shaft (7) and aligned therewith inside said chamber (9). Impeller comprises first and second discs (1, 2) aligned with axial clearance there between and having inlet holes (6) at central area. Impeller has first inlet of fluid (5) for axial feed to axial clearance between said first and second discs (1, 2) via inlet of first disc (1). Impeller has second inlet of fluid for axial feed to axial clearance between said first and second discs (1, 2) via inlet (6) of second disc (2). Besides, it has outlet for discharge of first and second fluids from working chamber (9) periphery. Said impeller comprises extra mid solid disc (3) fitted aligned between discs (1, 2) and with clearance there between and discs (1, 2). OD of mid disc (3) is smaller than OD of discs (1, 2) and larger than that of outer circle on inlets (6) of discs (1, 2).

EFFECT: simple design, lower production and operating costs, power saving, higher reliability.

10 cl, 4 dwg