Patent ID: 6162034
Filing Date: 2000-12-19
Classification: F01C,F04C,F05C

Abstract:
A rotary vane pumping machine having a core structure and peripheral components interfacing with the core structure, the core structure comprising:a stator assembly comprising an annular ring, the inner circumferential surface of the annular ring defining a contoured surface of a stator cavity;a rotor spinning around a rotor shaft axis, the rotor shaft axis being a fixed rotational axis relative to the stator cavity, the rotor having a plurality of radial vane slots and the rotor and stator being in relative rotation;a plurality of vanes, each of the plurality of vanes sliding with at least one of a radial and axial component of vane motion within a corresponding radial vane slot of the rotor, and each of the plurality of vanes having a tip portion and a base portion, the base portion having at least one protruding tab extending from at least one axial end therefrom;a guidance device engaging the tabs to control radial movement of the vanes; anda first end plate and a second end plate, each being adjacent an axial side of the rotor located therebetween, with the rotor shaft extending through at least one of the first end plate and the second end plate, wherein an outer circumferential surface of the rotor comprises an annular sealing lip extending axially toward respective of the first end plate and the second end plate,wherein the plurality of vanes, the stator cavity, and the rotor define a plurality of chamber cells,wherein the vane tip portion and the contour of the stator cavity are spaced apart by a radial clearance,wherein the stator assembly, rotor, guidance device, first end plates and second end plate together define a first combined core structure, andwherein the first combined core structure is substantially comprised of an invar-class alloy.