HELICAL GEROTOR HYDRAULIC MACHINE Russian patent published in 2020 - IPC E21B4/02 F01C1/107 F04C2/107 

FIELD: oil industry.

SUBSTANCE: invention relates to gerotor mechanisms of screw downhole motors for drilling oil and gas wells, to screw pumps for oil production from wells, as well as to screw hydraulic motors and general-purpose hydraulic pumps. Helical gerotor hydraulic machine includes a rotor and a stator, having a hollow housing with an inner surface made in the form of a helicoid with internal helical multi-start teeth, a ferrule of elastomer, for example, made of rubber, fixed in the hollow housing, as well as two hollow modules located on edges of hollow housing, made integral with it in form of its end parts. Elastomer cover is fixed in the hollow body by vulcanization of the workpiece of said cover in form of a rubber hollow chamber of cylindrical shape, circumference of outer surface of which in its initial state before vulcanisation is equal to total length of contour of inner surface formed by inner helical multi-start teeth of hollow body in its cross section.

EFFECT: simplified manufacturing of hydraulic machine, increased resource of its operation, reliability and coefficient of efficiency (efficiency).

4 cl, 4 dwg