Boreless hub compressor wheel assembly for a turbocharger
AssigneeAllied-Signal Inc.
InventorsEdwin R. Deacon, William R. Swihart, Jonathan R. Heim
Life of this patent
Estimating the term…
Abstract
An improved compressor wheel assembly for a 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 from an aluminum alloy to include an integral mounting sleeve extending coaxially from the boreless hub and adapted for connection as by threading with a turbocharger shaft. An annular spacer ring of wear resistant material is mounted on the wheel mounting sleeve and defines wear resistant surfaces for supporting one or more seal rings within the bore of a compressor backplate opening, and for axially engaging an adjacent thrust bearing unit associated with the turbocharger shaft.
Claims20
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 internal bore, said mounting sleeve extending into said backplate opening and having said shaft end received into said mounting sleeve bore;
- an annular spacer ring of a wear resistant material secured to said mounting sleeve and installed with said compressor wheel when the compressor wheel is installed on said shaft and removed with the compressor wheel when the compressor wheel is removed from said shaft, said ring defining a radially outwardly open groove disposed generally within said backplate opening;
- at least one seal ring seated within said groove in substantial sealing engagement between said spacer ring and said backplate;
- and
- a thrust collar separate from said annular spacer ring rotatable with said shaft, said thrust collar having an annular channel receiving a thrust bearing for axially setting and retaining said shaft.
A compressor wheel assembly, comprising:
- a compressor backplate defining a backplate opening;
- a rotatable shaft having a first end;
- a compressor wheel having a boreless hub supporting an array of impeller blades, and a mounting member formed integrally with and extending coaxially from said hub into said backplate opening;
- means for interconnecting said shaft first end with said mounting member in generally coaxial alignment for rotation of said compressor wheel with said shaft;
- spacer means of a wear resistant material secured to said mounting member and installed with said compressor wheel when the compressor wheel is installed on said shaft and removed with the compressor wheel when the compressor wheel is removed form said shaft, said spacer means defining a radially outwardly open groove disposed generally within said backplate opening;
- at least one seal ring carried within said groove in sealing relation with said backplate;
- and
- a thrust collar separate from said spacer means rotatable with said shaft, said thrust collar having an annular channel receiving a thrust bearing for axially setting and retaining said shaft.
Dependencies are inferred from the claim text.