MULTISTAGE ABRASION-PROOF GUIDED-VANE PUMP Russian patent published in 2015 - IPC F04C2/344 

FIELD: engines and pumps.

SUBSTANCE: invention relates to pump engineering, particularly, to multistage displacement pumps and can be used for lift of fluid from oil wells. The pump consists of the stages each including cylindrical case (3) with shaped inner surface confined by upper and lower bases (5) and (4) with intake and discharge openings (12) and (11), rotor (1) with cut-outs (2) fitted on the shaft aligned with case (3) for displacement of working plate (7) provided with legs (8). Closed grooves (9) are made in legs bases (4) and (5) and spaced apart on inner surface of case (3) through distance that allows the clearance between the end of working plate (7) and inner surface of case (3). Plates (7) and cut-outs (2) for their displacement are inclined relative to rotational axis of rotor (1) so that plates (7) make axial-type vane system. Grooves (9) feature monotonously varying curvature described in polar coordinate system by the equation.

EFFECT: higher structural reliability, increased pressure developed by the pump, high resistance to abrasion.

4 dwg