ROTARY VOLUMETRIC EXPANSION MACHINE Russian patent published in 1999 - IPC

FIELD: mechanical engineering; power plants. SUBSTANCE: pump has housing, end face plates with closed guide grooves, rotor with end face disks, and blades installed in rotor slots. Grooves are made in form of closed curve consisting of conjugated four flat spirals with common center of rotation coinciding with axis of rotation of cylindrical housing. Intermediate sealing member is made in form of truncated cylinder rocking on axle passing through external end of blade and parallel to axle of rotor. Intermediate member has cavities with sealing plates. EFFECT: increased service life and enhanced reliability of machine. 3 dwg