Accession Number : ADD014795

Title :   High Pressure Single Screw Compressors.

Descriptive Note : Patent, Filed 21 Dec 88, patented 1 Jan 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Bein, Thomas W

Report Date : 01 Jan 1991

Pagination or Media Count : 14

Abstract : Disclosed is a single screw mechanism of the positive displacement rotary type such as a compressor or expander for varying the pressure of a fluid. A stationary housing having a bore symmetry surrounds and is configured to cooperate in a substantially fluid-tight manner with the surface of revolution of the crests of a compound conical mainrotor having a plurality of projecting spiral threads whose root width-thread height define substantially constant cross sectional chamber areas in the grooves between adjacent threads along their length for substantially fluid-tight engagement with the teeth of at least one rotatably mounted cylindrical gaterotor whose axis is symmetrically inclined at a transverse angle that is less than 90 degrees with respect to the fixed spin axis of said mainrotor so as to permit the toothed outer peripheral surface containing labyrinthial seals to extend through a window path opening in said housing thereby exposing one side of each gaterotor tooth face in meshing relation with the mainrotor chamber in the housing to the changed-pressure fluid during rotation.

Descriptors :   ANGLES, BORES, DISPLACEMENT, EXTERNAL, HOUSING(DWELLINGS), OPENING(PROCESS), PATHS, ROTATION, SPINNING(MOTION), STATIONARY, SURFACES, SYMMETRY, TEETH, TRANSVERSE, WINDOWS

Subject Categories : Hydraulic and Pneumatic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE