Helical screw rotor profiles

Details Helical screw rotor profiles Helical screw rotor profiles

1981-08-25

1983-11-01

Smith, Leonard E.

Rotary expansible chamber devices

Interengaging rotating members

Helical or herringbone

F01C 120, F01C 116, F04C 1820

Patent

active

044127960

ABSTRACT:
The invention concerns helical- or screw-type driving and driven rotors having lands and intervening grooves for coacting engagement, within a housing of a machine, such as a gas compressor or expander, the rotors having improved, more efficient, profiles. The profiles are defined with contiguous elliptic and involute sections to improve the pressure angle, and the profiles are configured to define rotor-to-rotor sealing surfaces in closure of a compressed gas pocket in which, the pocket gas pressure always urges or torques the driven rotor in the positive or forward-rotary direction.

REFERENCES:
patent: 3622256 (1971-11-01), Drezdenskaya
patent: 4140445 (1979-02-01), Schibbye
patent: 4350480 (1982-09-01), Bammert

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