Compressor impeller assembly for a turbocharger
AssigneeElectro-Motive Diesel, Inc.
InventorsGary R. SVIHLA, Raji REXAVIER
Life of this patent
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Abstract
A compressor impeller assembly is disclosed. The compressor impeller assembly may have a compressor impeller having an impeller bore. The compressor impeller assembly may further have an insert screwed into the impeller bore, the insert having a threaded insert bore. The compressor impeller assembly may also have a shaft having a threaded shaft bore. In addition, the compressor impeller assembly may have a stud. The stud may have a first threaded portion engaged with the threaded insert bore. The stud may also have a second threaded portion engaged with the threaded shaft bore.
Claims20
A compressor impeller assembly, comprising:
- a compressor impeller having an impeller bore;
- an insert screwed into the impeller bore, the insert having a threaded insert bore;
- a shaft having a threaded shaft bore;
- a stud, including:
- a first threaded portion engaged with the threaded insert bore;
- and
- a second threaded portion engaged with the threaded shaft bore.
A compressor impeller assembly, comprising:
- a compressor impeller including:
- a front end and a rear end opposite the front end;
- a nose disposed adjacent the front end;
- a hub extension disposed adjacent the rear end, the hub extension having an impeller bore and a first outer surface;
- and
- blades disposed between the nose and the hub extension;
- an insert screwed into the impeller bore;
- and
- a shaft extending from a first shaft end to a second shaft end, the shaft being attached to the insert adjacent the first shaft end.
A turbocharger, comprising:
- a turbine housing;
- a turbine wheel disposed within the turbine housing and configured to be rotated by exhaust received from an engine;
- a compressor housing;
- a compressor impeller disposed within the compressor housing, the compressor impeller including a hub extension having an impeller bore and a first outer surface;
- an insert including:
- a first insert portion disposed within the impeller bore, the first insert portion having a threaded insert bore having a first pitch;
- and
- a second insert portion disposed outside the impeller bore, the second insert portion having a second outer surface;
- an impeller cap extending from a first cap end to a second cap end, the impeller cap including:
- a cap portion disposed adjacent the first cap end and engages with the first outer surface;
- and
- a cap bore disposed between the first cap end and the second cap end, the cap bore engages with the second outer surface;
- a thrust washer disposed adjacent the second cap end;
- a shaft extending from a first shaft end to a second shaft end, the shaft being attached to the turbine wheel adjacent the second shaft end, the shaft including a threaded shaft bore having a second pitch different from the first pitch, the threaded shaft bore being disposed between the first shaft end and the second shaft end;
- and
- a stud, including:
- a first threaded portion engaged with the threaded insert bore;
- and
- a second threaded portion engaged with the threaded shaft bore.
Dependencies are inferred from the claim text.