Compressor assembly having a diffuser ring with tabs

Patent metadata

Field	Value
Publication number	US-10006341-B2
Application number	US-201514642323-A
Country	US
Kind code	B2
Filing date	Mar 9, 2015
Priority date	Mar 9, 2015
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A compressor assembly is disclosed. The compressor assembly may have a compressor housing. The compressor assembly may also have a compressor impeller disposed within the compressor housing. Further, the compressor assembly may have a bearing housing attached to the compressor housing. The compressor assembly may also have a diffuser ring disposed between the compressor housing and the bearing housing. In addition, the compressor assembly may have at least one tab. The tab may extend radially outward from the diffuser ring. The tab may be configured to engage with a recess in the compressor housing. The compressor assembly may also have at least one fastener. The fastener may be configured to attach the diffuser ring and the compressor housing.

First claim

What is claimed is:

1. A compressor assembly, comprising:
a compressor housing having a recess, the recess including a recess rear face;
a compressor impeller disposed within the compressor housing;
a bearing housing attached to the compressor housing;
a diffuser ring disposed between the compressor housing and the bearing housing, the diffuser ring including an inner bore that is larger in a radial direction relative to the bearing housing such that a radial gap is formed between the bearing housing and the diffuser ring;
at least one tab extending radially outward from the diffuser ring, the at least one tab having a tab front face and being configured to engage with the recess in the compressor housing such that the tab front face is disposed adjacent the recess rear face and separated therefrom by an axial gap;
at least one fastener configured to attach the diffuser ring and the compressor housing;
a seal number disposed in sealing relation in the radial gap between the diffuser ring and the bearing housing; and
a wave spring disposed in an axial direction between the diffuser ring and the bearing housing.

2. The compressor assembly of claim 1 , wherein
the bearing housing includes a bearing housing flange,
the compressor housing includes a volute having a volute rear wall, and
the at least one tab is disposed between the bearing housing flange and the volute rear wall.

3. The compressor assembly of claim 2 , wherein the recess is disposed in the volute rear wall,
the recess rear face is disposed generally orthogonal to a rotational axis of the compressor assembly; and
a recess side surface extending axially from the recess rear face to a rear surface of the volute rear wall, wherein the at least one tab is radially separated from the recess side surface by a gap.

4. The compressor assembly of claim 3 , wherein
the tab side surface is radially separated from the recess side surface.

5. The compressor assembly of claim 1 , further including a plurality of tabs disposed circumferentially the diffuser ring, wherein the at least one tab is one of the plurality of tabs.

6. The compressor assembly of claim 5 , wherein
a first tab of the plurality of tabs is disposed about a first diametrical axis, and
a second tab of the plurality of tabs is disposed about a second diametrical axis disposed at an angle relative to the first diametrical axis.

7. The compressor assembly of claim 6 , wherein the first diametrical axis is disposed orthogonal to the second diametrical axis.

8. The compressor assembly of claim 7 , wherein a circumferential spacing between the tabs is non-uniform.

9. The compressor assembly of claim 7 , wherein a number of the tabs is 4.

10. A turbocharger, comprising:
a turbine housing;
a turbine wheel disposed within the turbine housing and configured to be driven by exhaust received from an engine;
a compressor housing having a recess, the recess including a recess rear face;
a compressor impeller disposed within the compressor housing;
a shaft connecting the turbine wheel and the compressor impeller;
a bearing housing attached to the compressor housing and the turbine housing;
a diffuser ring disposed between the compressor housing and the bearing housing, the diffuser ring including an inner bore that is larger in a radial direction relative to the bearing housing such that a radial gap is formed between the bearing housing and the diffuser ring;
at least one tab extending radially outward from the diffuser ring, the at least one tab having a tab front face and being configured to engage with the recess in the compressor housing such that the tab front face is disposed adjacent the recess rear face and separated therefrom by an axial gap;
at least one washer abutting on the bearing housing and the diffuser ring;
a seal member disposed in sealing relation in the radial gap between the diffuser ring and the bearing housing;
a wave spring disposed in an axial direction between the diffuser ring and the bearing housing; and
at least one fastener configured to pass through the at least one washer and attach the diffuser ring and the compressor housing.

11. The turbocharger of claim 10 , further including a plurality of tabs disposed circumferentially spaced apart on the diffuser ring, wherein the at least one tab is one of the plurality of tabs.

12. The turbocharger of claim 11 , wherein
a first tab of the plurality of tabs is disposed along a first diametrical axis, and
a second tab of the plurality of tabs is disposed along a second diametrical axis disposed at an angle relative to the first diametrical axis.

Assignees

• Caterpillar Inc

Inventors

• Annati Richard E
• Lancaster Robert C
• Adair David R

Classifications

• F04D17/06

  Helico-centrifugal pumps · CPC title

• F04D29/441

  especially adapted for elastic fluid pumps · CPC title

• F01D25/246 Primary

  Fastening of diaphragms or stator-rings · CPC title

• F02B37/00

  Engines characterised by provision of pumps driven at least for part of the time by exhaust · CPC title

• F04D29/284

  for compressors · CPC title