ROTOR-PISTON MACHINE WITH OVAL ROTARY PISTON ORDERLY MOVING IN OVAL CHAMBER Russian patent published in 2009 - IPC F01C1/22 F01C19/04 

FIELD: motors and pumps.

SUBSTANCE: invention is related to rotor-piston machine. Rotor-piston machine comprises casing 10 and prismatic chamber 12, cross section of which forms oval. Chamber 12 comprises moving piston 22, cross section of which also forms oval. Order of rotary piston 22 oval exceeds chamber 12 oval by one. Rotary piston 22 is able to rotate, alternately rotating at motion sections that follow each other around different rotation axes. Rotary piston 22 side surface in any position adjoins to internal wall of chamber 12, creating two working cavities 80, 82. Rotary piston 22 is arranged with aperture 36 equipped with internal teeth 56, which are engaged with gear device. Gear device has pair of shafts 70, 72 installed in casing and equipped with external gear rims 74, 76. In order to provide sealing between working cavities, pairs of neighbouring sealing planks are available in internal wall of chamber with concave cylindrical internal surfaces. Radius of one internal surface curvature corresponds to smaller radius of rotary piston 22 side surface curvature. Radius of the other sealing surface curvature corresponds to larger radius of rotary piston 22 side surface curvature.

EFFECT: creation of sealing between casing and rotary piston.

4 cl, 12 dwg