Rotary vane machine

The invention can be used in rotary vane pumps, hydraulic motors, hydrostatic differential gears and transmissions with high efficiency and at a high pressure. The inventive rotary vane machine is provided, in each power variable length chamber (7), with means which are used for insulating the power cavity thereof (8) and comprise at least two movable elements (9), which are arranged in such a way that sliding insulation contacts are formed between the insulation surface of one of the movable elements and the insulation surface of one part of an adaptive unit, between the insulation surface of the other movable element and the insulation surface of the other part of the adaptive unit and between the insulation surfaces of the movable elements (9). At least in one of said contacts, the twoinsulation surfaces are embodied cylindrical, and, at least in one contact, they are spherical, and at least in one of the remaining contacts, the two insulation surfaces are flat or spherical. Said invention makes it possibl