Rotary expansible chamber devices – Interengaging rotating members – Helical or herringbone
Patent
1986-06-26
1987-07-14
Croyle, Carlton R.
Rotary expansible chamber devices
Interengaging rotating members
Helical or herringbone
F04C 1816
Patent
active
046799966
ABSTRACT:
Rotary machine such as rotary compressor or expander having meshed male and female rotor assembly. The tooth profile of the female rotor is formed such that a line (H.sub.2 -A.sub.2) is formed by a generated curve of a point A.sub.1 of the male rotor; a line (A.sub.2 -B.sub.2) is formed by a circular arc having a point O.sub.7 as the center of the arc and a radius R.sub.7 ; a curve (B.sub.2 -C.sub.2) is formed by an envelope developed by a circular arc (B.sub.1 -C.sub.1) of the male rotor; a portion between points D.sub.2 and E.sub.2 is formed by a circular arc having a point O.sub.1 as the center of the arc and a radius R.sub.1 ; a line (C.sub.2 -D.sub.2) is formed by a line smoothly connecting the curves (B.sub.2 -C.sub.2) and (D.sub.2 -E.sub.2); a curve (E.sub.2 -F.sub.2) is formed by a circular arc having a point O.sub.2 as the center of the arc and a radius R.sub.2 ; and a curve (F.sub.2 -G.sub.2) is formed by a circular arc having a point O.sub.8 as the center of the arc and a radius R.sub.8. The tooth profile of the male rotor is formed such that a curve (H.sub.1 -A.sub.1) is formed by a generated curve of a point H.sub.2 of the female rotor; a curve (A.sub.1 -B.sub.1) is formed by an envelope developed by the arc (A.sub.2 -B.sub.2) of the female rotor; a curve (B.sub.1 -C.sub.1) is formed by a circular arc having a point O.sub.4 as the center of the arc and a radius R.sub.4 ; a curve (D.sub.3 -E'.sub.1) is a circular arc having a point O.sub.6 as the center of the arc and a radius R.sub.6 ; a curve (E.sub.1 '-E.sub.1) is an envelope developed by an arc (D.sub.2 -E.sub.2) of the female rotor; curves (E.sub.1 -F.sub.1) and (F.sub.1 -G.sub.1) are generated by arcs (E.sub.2 -F.sub.2) and (F.sub.2 -G.sub.2) of the female rotor tooth profile, respectively, and a seal strip is formed between points C.sub.1 and D.sub.3.
REFERENCES:
patent: 4435139 (1984-03-01), Astberg
patent: 4460322 (1984-07-01), Schibbye
patent: 4508496 (1985-04-01), Bowman
patent: 4527967 (1985-07-01), Ingalls
patent: 4576558 (1986-03-01), Tanaka et al.
patent: 4583927 (1986-04-01), Shigekawa
Kanai Junichi
Maehara Atsushi
Tanaka Masanori
Croyle Carlton R.
Hokuetsu Industries Co., Ltd.
Obee Jane E.
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