FIELD: engine engineering. SUBSTANCE: engine has fixed hollow case with a cover. The case has shaft mounted for periodic rotation, rotor made of two parts of bushing and disk, and two groups of vane working members one of which is rigidly connected to the bushing and the other to the disk. All spaces between contacting surfaces are provided with seals. Inner surface of the case and outer surface of the bushing are made of trancated cones the large bases of which face opposite sides and the vanes are conjugated with them. The disk is positioned from the side of the larger base of the case space. The bushing and disk are mounted for axial controlled displacement. Inner surface of the case space is provided with a periphery groove. A gate, mounted for periphery fixed displacement and overlapping cross-section of the groove, is received in the groove. EFFECT: enhanced efficiency. 2 cl, 9 dwg
