FIELD: hydropneumatic machinery engineering. SUBSTANCE: rotary hydropneumatic machine has housing with inlet and outlet holes and stator with cylindrical rotor eccentrically located in it. Rotor has one or several diametral grooves where gates with end cylindrical slots are located; cylindrical slots are used for mounting the inserts whose surface consists of two convex intersecting cylindrical surfaces; rotors form arcs of different radii. Stator profile has form of circle or curve whose radius is equal to large radius of generating arcs of insert at zones of maximum pressure differential of working medium and/or maximum contact loads. EFFECT: enhanced reliability. 4 dwg
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