Rotary, positive-displacement machine, of the helical-rotor type

Details Rotary, positive-displacement machine, of the helical-rotor type Rotary, positive-displacement machine, of the helical-rotor type

1984-01-16

1985-04-02

Smith, Leonard E.

Rotary expansible chamber devices

Interengaging rotating members

Helical or herringbone

418150, F01C 116

Patent

active

045084963

ABSTRACT:
The machine, in the embodiment shown, is an air (or gas) compressor having a housing with parallel, intersecting bores in which are rotatably journaled coacting, meshing helical rotors. The rotors, male and female, are of the asymmetrical type. Confronting concave and convex surfaces of portions of the grooves and lobes of the rotors, for having different arcuate conformations along principal lengths thereof, define a void of varying width therebetween. However, other, minor extents of the confronting surfaces are defined of a common arc and, therefore, nestably conform with each other (a) to reduce contact stress therebetween, (b) to improve rotor-to-rotor sealing, and (c) to accommodate therebetween a significant film of oil.

REFERENCES:
patent: 3787154 (1974-01-01), Edstrom
patent: 4088427 (1978-05-01), Emanuelsson
patent: 4412796 (1983-11-01), Bowman

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