Rotary expansible chamber devices – Interengaging rotating members – Non-parallel axis
Patent
1996-10-25
1998-07-21
Vrablik, John J.
Rotary expansible chamber devices
Interengaging rotating members
Non-parallel axis
F01C 308
Patent
active
057826242
ABSTRACT:
Fluid compressor or expander having a main rotor with discrete arcked-helical flutes that have ruled surface roots that match the predominantly planar tips of the teeth of the associated gate rotors and provide effective fluid sealing as the gate rotor teeth sweep through the flutes of the main rotor during compressor or expander operation. The flutes can be readily and economically made by end milling, in which a first flute is milled with a minimized number of milling passes such as a first pass to make one arcked-helical flank and a portion of the arcked-helical root of a first flute and a second pass to make the opposing arcked-helical flank and another portion of the arcked-helical root of the first flute. Additional discrete flutes are made in a similar manner until the main rotor is completed.
REFERENCES:
patent: 3133695 (1964-05-01), Zimmern
patent: 3932077 (1976-01-01), Zimmern
patent: 3945778 (1976-03-01), Zimmern
patent: 4036567 (1977-07-01), Sato
patent: 4179250 (1979-12-01), Patel
patent: 5129800 (1992-07-01), Boblitt
"Curves and Surfaces for Computer Aided Geometric Design, A Practical Guide", Gerald Farin, Academic Press, Inc., 1988, pp. 256-257.
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