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An improved compressor wheel assembly for a turbocharger or the like includes a centrifugal compressor wheel having a boreless hub to substantially improve wheel fatigue life. The compressor wheel is formed as by casting to include an integral and internally threaded mounting sleeve extending coaxia

An improved compressor wheel assembly for a turbocharger or the like includes a centrifugal compressor wheel having a boreless hub to substantially improve wheel fatigue life. The compressor wheel is formed as by casting to include an integral and internally threaded mounting sleeve extending coaxially from the boreless hub. In the assembly, the mounting sleeve extends through an opening in a compressor backplate for threaded connection to a turbocharger shaft, with a thrust collar spacer being interposed between axially facing shoulders defined respectively on the mounting sleeve and shaft to ensure accurate axial positioning of the components. An annular seal flange on the thrust collar spacer extends axially into the backplate opening in generally concentric spaced relation about the mounting sleeve. This seal flange is adapted to carry one or more seal rings for engaging the backplate, thereby sealing the passage of the mounting sleeve and shaft through the backplate opening.

대표청구항 ▼

A compressor wheel assembly comprising: a compressor backplate defining a backplate opening; a rotatable shaft having a threaded end; a centrifugal compressor wheel having a boreless hub supporting an array of impeller blades, and a mounting sleeve formed integrally with and extending coaxially from

A compressor wheel assembly comprising: a compressor backplate defining a backplate opening; a rotatable shaft having a threaded end; a centrifugal compressor wheel having a boreless hub supporting an array of impeller blades, and a mounting sleeve formed integrally with and extending coaxially from said hub, said mounting sleeve defining an internally threaded bore, said mounting sleeve extending into said backplate opening and having said shaft end threaded into said mounting sleeve bore, said mounting sleeve and said shaft respectively defining axially opposed first and second shoulders when said shaft end is threaded into said mounting sleeve bore; a thrust collar spacer including a collar segment interposed axially between said first and second shoulders in abutting relation therewith when said shaft end is threaded into said mounting sleeve bore to axially position said compressor wheel relative to said shaft, said thrust collar spacer further including an annular seal flange extending axially into said backplate opening in generally concentric spaced relation between said mounting sleeve and said backplate within said backplate opening; and at least one seal ring carried by said seal flange in substantially sealing engagement between said seal flange and said backplate.