| 摘要 |
A turbocharger compressor housing unit includes an outer housing and a wall insert for engagement with the outer housing. The outer housing has a compressor inlet port, a wall transverse to the inlet port and extending outwardly therefrom and a circumferential chamber attached to the transverse wall spaced from the inlet port. The chamber has an opening substantially in the plane of the transverse wall. The wall insert is formed with a tubular throat having a disc attached at one end of the tubular throat transverse thereto. The disc has an aperture corresponding to an opening defined through the throat. Rivet protrusions are integrally formed and extend from the disc and correspond to apertures in the transverse wall of the compressor housing. The rivet protrusions engage the apertures in the transverse wall to join the insert to the outer housing with the disc in engagement with the transverse wall. The disc partially encloses the opening in the plane of the wall of the circumferential chamber. The inlet port has an inside surface with a first portion having a varying diameter converging toward the wall and a second portion diverging in diameter toward the transverse wall. The tubular throat of the wall insert has an inside surface converging in diameter toward the disc and an outside surface with a diameter diverging toward the disc to mate with the diverging inner surface of the inlet port. A bearing support cylinder is positioned within the inlet port by a plurality of vanes attached to and extending inwardly from the inner wall of the inlet port. The vanes have a leading edge and a trailing edge separated by a thicker intermediate vane section. The tubular throat of the wall insert is notched to correspond with the vanes such that the throat wall straddles the vanes when the wall insert is attached to the outer housing.
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