STATOR OF SCREW GEROTOR HYDRAULIC MACHINE Russian patent published in 2021 - IPC E21B4/02 F01C1/107 F03C2/08 

FIELD: machine building.

SUBSTANCE: invention relates to hydraulic drives for rotary drilling located in a well. Stator of helical gerotor hydraulic machine comprises tubular housing 1 with inner surface with inner helical multi-start teeth, coating 9 from elastomer, made with inner helical multi-start teeth. Housing 1 on length 25 of attachment of coating 9 comprises a number of inner cavities 26 and 27, each of which is made in form of annular groove 28 and 29 on surface of housing 1, adjacent to side surfaces 30 and 31 of teeth of housing 1, formed by groove 28 and 29 on surface housing 1. Coating 9 on length 25 of attachment to teeth of housing 1 comprises, in each of chambers 26 and 27, stator damper 34 and 35 from elastomer with inner helical teeth adjoining to teeth of coating 9 adjacent to surface of annular groove 28 and 29 inside housing 1 and side surfaces 32 and 33 of teeth of housing 1, formed by groove 28 and 29 with possibility of attachment to coating 9, as well as groove 28 and 29 inside housing 1 and surfaces 30 and 31. Internal screw teeth of damper 34 and 35 also adjoin to surfaces 32 and 33 of teeth of housing 1.

EFFECT: invention is aimed at increasing resource and reliability of hydraulic machine.

4 cl, 14 dwg