| 摘要 |
<p>An improved compressor wheel assembly (12) for a turbo-charger or the like includes a centrifugal compressor wheel (14) having a boreless hub (22) to substantially improve wheel fatigue life. The compressor wheel (14) is formed as by casting to include an integral and internally threaded mounting sleeve (42) extending coaxially from the boreless hub (22). In the assembly, the mounting sleeve (42) extends through an opening (18) in a compressor backplate (20) for threaded connection to a turbocharger shaft (16), with a thrust collar spacer (56) being interposed between axially facing shoulders (62, 64) defined respectively on the mounting sleeve (42) and shaft (16) to ensure accurate axial positioning of the components. An annular seal flange (72) on the thrust collar spacer (56) extends axially into the backplate opening (18) in generally concentric spaced relation about the mounting sleeve (42). This seal flange (72) is adapted to carry one or more seal rings (76) for engaging the backplate (20), thereby sealing the passage of the mounting sleeve (42) and shaft (16) through the backplate opening (18).</p> |
