Screw rotor machines with specific tooth profiles

Details Screw rotor machines with specific tooth profiles Screw rotor machines with specific tooth profiles

1985-05-29

1987-01-13

Vrablik, John J.

Rotary expansible chamber devices

Interengaging rotating members

Helical or herringbone

418150, F04C 1816

Patent

active

046361561

ABSTRACT:
A screw rotor machine for compressing air or other working fluid comprises a housing including two intersecting bores axes which together define a working space. The pair of intermeshing rotors are rotatably mounted one in each bore. The rotors have helical lands and intervening grooves whereby rotation of the rotors in connecting engagement is effective to compress the working fluid (or to expand the fluid if the machine is used as an expander). A low pressure port and a high pressure port formed in the housing at opposite ends thereof permits inlet and outlet of the working fluid. The grooves of the rotors each have a primary flank and a secondary flank. The tips of the primary flanks of both the male and female rotors are formed by parabolic arcs which generate major portions of one of the flanks of the opposite rotors. A major portion of the secondary flank of the female rotor is also a parabolic arc.

REFERENCES:
patent: 3314598 (1967-04-01), Lysholm
patent: 3432089 (1969-03-01), Schibbye
patent: 4406602 (1983-09-01), Kasuya
patent: 4435139 (1984-03-01), Astberg
patent: 4460322 (1984-07-01), Schibbye

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