Scroll structure of centrifugal compressor
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsKenichiro Iwakiri, Isao Tomita, Motoki Ebisu, Hiroshi Suzuki, Takashi Shiraishi
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Abstract
A scroll structure of a centrifugal compressor 1 having a spirally formed scroll passage 13. The scroll passage 13 includes: a flat connecting portion A at a flow passage joint 23 where a scroll start and a scroll end of the scroll passage 13 meet, this flat connecting portion having a flat cross-sectional shape with a same height as that of an outlet passage of a diffuser; and a transition part 21 where the flat cross-sectional shape of the flat connecting portion A gradually changes back to a circular cross-sectional shape along a circumferential direction.
Claims8
A centrifugal compressor comprising:
- a compressor blade;
- a diffuser disposed on a radially outer side of the compressor blade;
- an outlet passage;
- and
- a scroll passage formed spirally around the diffuser, said scroll passage including:
- a connecting portion disposed at a flow passage joint where a scroll start and a scroll end of the scroll passage meet, the connecting portion having a flat-sided cross-sectional shape with a same height as that of the outlet passage of the diffuser;
- and
- the scroll passage further comprising a transition part disposed on a downstream side of the flat-sided connecting portion, the transition part having a cross-sectional shape which gradually changes, along a circumferential direction of the centrifugal compressor, from the flat-sided cross-sectional shape of the connecting portion to a circular cross-sectional shape.
Dependencies are inferred from the claim text.