| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent degradation in compression efficiency without cancelling out merits such as weight and cost reduction, in a centrifugal compressor equipped with a resin housing. <P>SOLUTION: A turbocharger 10 is equipped with a resin housing 20 that comprises a volute section 20a and a channel formation section 20b, and an impeller 14 that is fixed in the center of the channel formation section 20b to a rotating shaft 12. An annular shroud 22 is disposed in a recess 20b<SB>2</SB>formed on the inner wall 20b<SB>1</SB>of the channel formation section 20b, and the annular shroud 22 forms the outer walls of a channel c and a diffuser (a static pressure increase region) d for compressed gas. The edge of the annular shroud 22 on the downstream side is fixed via a spacer 24 to a partition wall 32, which forms a portion of a bearing housing 30, by means of a bolt 26. Even if the resin housing 20 undergoes thermal deformation, the dimensions of a gap T between the annular shroud 22 and the curved profile 16a of a blade 16 can be maintained at set dimensions. <P>COPYRIGHT: (C)2011,JPO&INPIT |
