DISPLACEMENT ROLLER PUMP Russian patent published in 2017 - IPC F04C11/00 F04C2/344 

FIELD: engines and pumps.

SUBSTANCE: pump comprises a stator housing 1 and a rotor 3 with slots 4 rotatably mounted on a shaft in the inner cavity of the stator housing 1, in which the cylindrical rollers 5 are located, and face covers 8, closing the upper and lower working chambers formed by the rotor 3 outer surface, the inner surface of the stator housing 1 and the side surface of the roller 5. The pump is multi-stage. The upper cover 8 of the previous stage is used as a bottom cover 8 for the next stage. The adjacent stages are positioned with respect to each other with an angular displacement, enabling the injection zone of the previous stage and the suction of the subsequent stage to be aligned with the channel 10 in the cover 8. The shape of the inner surface of the stator housing 1 is made with a monotonically varying curvature of the profile, described by the equation.

EFFECT: providing the required pump head to lift liquid from an oil well of random depth and increase time of its trouble-free operation.

3 dwg