JET PUMP Russian patent published in 1999 - IPC

FIELD: liquid medium delivery equipment. SUBSTANCE: jet pump has nozzle narrowing in the course of flow of medium, mixing chamber with at least two conical gradually narrowing portions having angle of taper gradually reducing from one portion to the other portion, and cylindrical portion, and is further provided with device for supplying additional flow of passive medium. Conical portion of mixing chamber terminating in the course of flow of medium has angle of taper of from 1 deg to 4 deg and conical portion penultimate in the course of flow of medium has angle of taper of from 10 deg to 22 deg. Device for supplying additional flow of passive medium is communicated with cavity of cylindrical portion of mixing chamber along its section contour via at least one channel inclined to geometric longitudinal axis of pump in the course of flow of medium. As a result, additional passive medium is supplied and it may be under lower pressure than main flow. EFFECT: increased efficiency and simplified construction. 4 cl, 2 dwg