SCREW GEROTOR MACHINE Russian patent published in 2010 - IPC E21B4/02 

FIELD: construction.

SUBSTANCE: screw gerotor machine includes stator with internal screw teeth and rotor with external screw teeth. Stator includes hollow housing with end threaded passages, a sleeve with internal screw teeth, which is installed in it, and lining fixed in sleeve and repeating the shape of its internal surface and made from elastomer. Sleeve is installed and centered in the housing at least on two installation belts made on external sleeve surface and located on sleeve edges; between adjacent installation belts there made is a groove forming an annular chamber between internal surface of hollow housing and surface of the sleeve groove. In the area of groove the sleeve has openings attaching external and internal surfaces of the sleeve to each other; at that, space of sleeve openings and space of annular chamber between internal surface of hollow housing and surface of sleeve groove are filled with elastomer. Elastomer is attached to surfaces of sleeve surfaces, internal surface of hollow housing and surface of sleeve groove. Sleeve openings have round shape and (or) oblong and (or) screw shape.

EFFECT: increasing service life and reliability of screw gerotor hydraulic machine during operation, simplifying the design and manufacturing procedure of screw gerotor hydraulic machine, increasing operating torque and efficiency.

7 cl, 6 dwg