| 摘要 |
A centrifugal compressor is described herein which comprises a bearing housing, an impeller rotatably mounted to the housing, and an integral compressor cover mounted upon the housing and including an impeller chamber within which the impeller is received. The compressor cover includes a wall portion which defines the impeller chamber and further includes a scroll portion defining a volute passageway surrounding the impeller chamber. The scroll portion includes a mounting flange having a cylindrical pilot surface secured to a mounting flange on the bearing housing. The cover further includes a ring-like flange extending outwardly from one end of the wall portion and forming with the mounting flanges of the scroll and bearing housing an annular, diffuser passageway communicating with the volute passageway and the impeller chamber. The diffuser flange extends radially outward of the pilot surface of the scroll, only the portion of the diffuser flange which is radially inward of the pilot surface being machined. The diffuser flange includes a negative, axial offset at a location radially at or inward of the pilot surface and continuing for the outward extent of the flange. |
