DOUBLE-ACTING POSITIVE DISPLACEMENT PUMP FOR FLUID MEDIUM Russian patent published in 2020 - IPC F04B5/02 F04B47/02 

FIELD: engines and pumps.

SUBSTANCE: invention relates to reciprocating high pressure pumps and can be used, for example, in oil and gas industry, for cryogenic fluid media pumping, as well as for purification and washing with a jet. Fluid double displacement double displacement pump has two or more housings (3A, 20A). First housing (3A) comprises inlet pump chamber (3) of fluid medium. Separate second housing (20A) comprises outlet pump chamber (20) of fluid medium. Fluid inlet pumping chamber communicates fluidly with fluid outlet pumping chamber via through channel 6A. Feed channel (6A) has inlet located in inlet pumping chamber of fluid medium. Outlet is located in the outlet pumping chamber of fluid medium. Inlet part (6) of the plunger has an effective displacement area which is larger than the effective displacement area of output part (21) of the plunger. Said channel is additionally equipped with unit (9) of integrated suction-discharge valve located in it. Inlet pump chamber (3) of fluid medium comprises central axis of inlet pump chamber of fluid medium and input (1B) for fluid medium, having unit (2) of inlet suction valve. Fluid output pump chamber (20) comprises central axis of fluid outlet pump chamber. Feed channel (6A) comprises pass channel axis. Central axis of fluid inlet pump chamber, the central axis of the output pump chamber of the fluid medium and the axis of the pass channel are coaxial and form the central axis of the double displacement direct displacement pump for the fluid medium.

EFFECT: higher reliability and service life of the pump.

11 cl, 8 dwg