Air cooling system for a turbocharger driven generator

Patent metadata

Field	Value
Publication number	US-9624934-B2
Application number	US-201213688808-A
Country	US
Kind code	B2
Filing date	Nov 29, 2012
Priority date	Dec 1, 2011
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

A turbocharger arrangement comprises a turbocharger and a generator. The turbocharger comprises a turbine having a turbine wheel and a compressor having a compressor wheel. The turbine wheel and the compressor wheel are mounted to a shaft, the shaft being supported by a bearing assembly located in a bearing housing between the turbine and the compressor, such that the shaft may rotate about an axis; The compressor wheel is between the generator and the bearing assembly; and an inducer portion of the compressor wheel is between an exducer portion of the compressor wheel and the bearing assembly.

First claim

The invention claimed is:

1. An engine system comprising an internal combustion engine and a turbocharger arrangement, the turbocharger arrangement comprising:
a turbocharger and a generator;
the turbocharger comprising a turbine having a turbine wheel and a compressor having a compressor wheel;
the turbine wheel and the compressor wheel being mounted to a shaft, the shaft being supported by a bearing assembly located in a bearing housing between the turbine and the compressor, such that the shaft may rotate about an axis;
wherein, the compressor wheel is between the generator and the bearing assembly; and wherein an inducer portion of the compressor wheel is between an exducer portion of the compressor wheel and the bearing assembly;
wherein a back face of the compressor wheel is in direct contact with a portion of the generator;
wherein the compressor has an inlet and an outlet, wherein the inlet is axially inboard of the compressor wheel;
wherein the outlet of the compressor comprises a annular outlet passageway and a volute arrangement around the outlet passageway; and
wherein the outlet of the compressor is in communication with an inlet of the internal combustion engine so as to provide compressed air to the internal combustion engine;
wherein the inlet has a first end adjacent the compressor wheel and a second end remote from the compressor wheel; and
wherein a portion of a wall defining the second end of the inlet is radial with respect to the axis, such that, in use, gas flowing through the second end of the inlet flows in a radial direction with respect to the axis.

2. The engine system according to claim 1 , wherein the inlet is defined by the wall, a tangent to a portion of the wall defining the first end of the inlet being parallel to the axis, such that, in use, gas flowing through the first end of the inlet flows in a direction parallel to the axis.

3. The engine system according to claim 1 , wherein the shaft has a plurality of discrete shaft portions which are joined to one another.

4. The engine system according to claim 1 , wherein the compressor wheel is housed in a compressor housing, the turbine wheel is housed in a turbine housing and the generator is housed in a generator housing.

5. The engine system according to claim 4 , wherein the compressor housing and generator housing are of one-piece construction.

6. The engine system according to claim 4 , wherein the bearing housing and compressor housing are of one-piece construction.

7. The engine system according to claim 1 , wherein an inlet of the turbine is in communication with an outlet of the internal combustion engine such that the turbine is drivable by exhaust gas from the internal combustion engine.

Assignees

• Cummins Ltd

Inventors

• Parker John F

Classifications

• F02B39/10

  electric · CPC title

• F04D25/0606

  the electric motor being specially adapted for integration in the pump · CPC title

• F04D25/024 Primary

  the driving means being assisted by a power recovery turbine · CPC title

• F04D19/00 Primary

  Axial-flow pumps (F04D21/00 takes precedence; {pump comprising axial flow and radial flow stages F04D17/025}) · CPC title

• F02B39/00

  Component parts, details, or accessories relating to, driven charging or scavenging pumps, not provided for in groups F02B33/00 - F02B37/00 · CPC title