Rotary expansible chamber devices – Interengaging rotating members – Helical or herringbone
Patent
1982-09-27
1984-10-09
Smith, Leonard E.
Rotary expansible chamber devices
Interengaging rotating members
Helical or herringbone
F01C 116, F01C 124
Patent
active
044758782
ABSTRACT:
A screw compressor including a female rotor and a male rotor rotating while meshing with each other, with the rotor tooth form of one of the female and male rotors meshing with each other without any clearance therebetween in normal temperature condition being used as a basic tooth form for obtaining a rotor tooth form produced by deformation on account of thermal expansion during operation. The basic tooth form and the tooth form thus obtained are employed in the assembled compressor. The rotors with these teeth form, when brought together in meshing engagement, have a clearance at start-up which allows for their expansion. This clearance is maintained at a minimum during operation of the compressor.
REFERENCES:
patent: 2325617 (1943-08-01), Lysholm
patent: 2683994 (1954-07-01), Whitfield
patent: 2901164 (1965-08-01), Whitfield
patent: 3179330 (1965-04-01), MacColl
Fujiwara Mitsuru
Kasuya Katsuhiko
Matsunaga Tetsuzo
Mori Hidetomo
Hitachi , Ltd.
Obee Jane E.
Smith Leonard E.
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