STATOR OF SCREW-GEROTOR HYDRAULIC MACHINE Russian patent published in 2008 - IPC E21B4/02 F01C1/107 F04C2/107 

FIELD: engines.

SUBSTANCE: stator has a hollow case, a tubular shell with the inner and outer screw teeth arranged inside the said case and contacting by its outer screw teeth with the hollow casing inner surface, an elastomer encasing arranged inside the said tubular shell and attached to its inner screw teeth, and screw elastomer dampers arranged in the tubular shell outer screw teeth spaces and attached to the hollow case inner surface and the tubular shell outer screw teeth spaces. The rolls attached to the hollow case inner surface are arranged between the hollows case inner surface and the outer screw teeth spaces along the tubular shell edges. Every roll contacts with the tubular shell outer screw teeth spaces and divides the screw damper into two halves the length of each roll equals, at least, the tubular shell screw teeth pitch. The number of rolls of every sides of the said tubular shell equals the number of the said shell outer screw teeth.

EFFECT: improved power performances, increased engine reliability and service life, maximum output, output shaft moment of force in the maximum load conditions and tolerable axial load as well as lower rotor rotational speed reduction rate on increasing the drill pit torque.

4 cl, 3 dwg