WELL SUCKER-ROD PUMP Russian patent published in 2017 - IPC F04B47/00 F04B53/14 F04B53/20 

FIELD: engines and pumps.

SUBSTANCE: pump contains a cylinder with a suction valve. The plunger is mounted in the cylinder with the possibility of reciprocating motion. On the outer surface of the plunger, closed grooves are marked, the transverse section of which has the form of a truncated inclined plane of a parabola, the symmetry axis of which forms an acute angle with the plunger axis in the direction of pump discharge. The depth of the grooves is not more than 1/20 of the plunger outer diameter. The mechanical impurities filter is made in the form of concentrically mounted pipes. The internal cross-sectional area of concentrically mounted filter pipes is greater than the cross-sectional area between the outer diameter of the inner pipe and the inner diameter of the outer concentrically mounted pipe. The intake of the inner tube is provided with a circular disc mounted perpendicular to the pump axis on the bracket. The length of the outer pipe is such that the disc is inside this pipe. The mechanical impurities preliminary accumulation tank valve is equipped with a L-shaped stop.

EFFECT: increased reliability of the pump and its protection against impurities, by applying a filter with a reduced rate of liquid upward flow, reduced leakage in the plunger pair.

4 dwg