Rotary, positive displacement machine with specific lobed rotor

Details Rotary, positive displacement machine with specific lobed rotor Rotary, positive displacement machine with specific lobed rotor

1991-04-25

1992-09-22

Bertsch, Richard A.

Rotary expansible chamber devices

Working chamber surface expressed mathematically

418191, F04C 1820

Patent

active

051492563

ABSTRACT:
A rotary positive-displacement machine of the type having intermeshing lobed rotors, comprising first and second two-lobed rotors mounted respectively in the two housing bores for synchronous rotation. The first, valve rotor has a hub portion which periodically occludes an outlet port to control the generation and discharge of high pressure fluid from the housing. Each lobe of the valve rotor has a leading tip portion which is radiussed so that it does not define a sharp edge. Each lobe also has an outer flank, a major portion of which is a convex curve, which is generated to correspond to the form of the tip of the second, displacement rotor and which merges with a convex arcuate portion whose center is offset from the valve rotor axis. Furthermore, each lobe has a trailing flank formed by a convex curve, generated to correspond to the form of the tip of the displacement rotor, which merges with a convex arcuate portion, whose center is offset from the valve rotor axis, followed directly by a concave arcuate portion whose center is also offset from the valve rotor axis.

REFERENCES:
patent: 3790315 (1974-02-01), Emanuelsson et al.
patent: 4138848 (1979-02-01), Bates
patent: 4224016 (1980-09-01), Brown
patent: 4324538 (1982-04-01), Brown
patent: 4430050 (1984-02-01), Blazejewski

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