Cabin air compressor housing

Patent metadata

Field	Value
Publication number	US-9243643-B2
Application number	US-201213559906-A
Country	US
Kind code	B2
Filing date	Jul 27, 2012
Priority date	Jul 27, 2012
Publication date	Jan 26, 2016
Grant date	Jan 26, 2016

Abstract

A cabin air compressor housing for a cabin air compressor assembly includes a compressor volute configured to direct a compressed flow to a compressor outlet. The cabin air compressor housing also includes a journal bearing support having a journal bearing bore. The cabin air compressor housing further includes an interior portion between the compressor volute and the journal bearing support. The interior portion includes a plurality of cooling airflow holes having a ratio of a diameter of the journal bearing bore to a diameter of one of the cooling airflow holes between 3.64 and 4.52.

First claim

The invention claimed is:

1. A cabin air compressor housing comprising:
a compressor volute configured to direct a compressed flow to a compressor outlet;
a journal bearing support comprising a journal bearing bore; and
an interior portion between the compressor volute and the journal bearing support, the interior portion comprising a plurality of cooling airflow holes having a ratio of a diameter of the journal bearing bore to a diameter of one of the cooling airflow holes between 3.64 and 4.52, wherein the plurality of cooling airflow holes are radially positioned about an axis of the cabin air compressor housing, and a ratio of a radius of the radial position of each of the cooling airflow holes to the diameter of each of the cooling airflow holes is between 4.05 and 5.38, wherein the plurality of cooling airflow holes comprises six cooling airflow holes spaced apart at an angle of 60 degrees.

2. The cabin air compressor housing of claim 1 , further comprising:
a fillet radius between the compressor volute and the compressor outlet;
a compressor volute inner radius proximate the compressor outlet;
a compressor volute center radius proximate the compressor outlet; and
a compressor volute outer radius proximate the compressor outlet.

3. The cabin air compressor housing of claim 2 , wherein a ratio of the compressor volute inner radius to the fillet radius is between 8.88 and 9.97.

4. The cabin air compressor housing of claim 2 , wherein a ratio of the compressor volute center radius to the fillet radius is between 11.78 and 13.19.

5. The cabin air compressor housing of claim 2 , wherein a ratio of the compressor volute outer radius to the fillet radius is between 14.94 and 16.67.

6. A cabin air compressor assembly comprising:
a compressor rotor operably connected to a shaft;
a plurality of bearings to support rotation of the shaft; and
a cabin air compressor housing comprising:
a compressor volute configured to direct a compressed flow produced by the compressor rotor to a compressor outlet;
a journal bearing support comprising a journal bearing bore and configured to receive one of the bearings; and
an interior portion between the compressor volute and the journal bearing support, the interior portion comprising a plurality of cooling airflow holes having a ratio of a diameter of the journal bearing bore to a diameter of one of the cooling airflow holes between 3.64 and 4.52, wherein the plurality of cooling airflow holes are radially positioned about an axis of the cabin air compressor housing, and a ratio of a radius of the radial position of each of the cooling airflow holes to the diameter of each of the cooling airflow holes is between 4.05 and 5.38, wherein the plurality of cooling airflow holes comprises six cooling airflow holes spaced apart at an angle of 60 degrees.

7. The cabin air compressor assembly of claim 6 , further comprising:
a fillet radius between the compressor volute and the compressor outlet;
a compressor volute inner radius proximate the compressor outlet;
a compressor volute center radius proximate the compressor outlet; and
a compressor volute outer radius proximate the compressor outlet.

8. The cabin air compressor assembly of claim 7 , wherein a ratio of the compressor volute inner radius to the fillet radius is between 8.88 and 9.97.

9. The cabin air compressor assembly of claim 7 , wherein a ratio of the compressor volute center radius to the fillet radius is between 11.78 and 13.19.

10. The cabin air compressor assembly of claim 7 , wherein a ratio of the compressor volute outer radius to the fillet radius is between 14.94 and 16.67.

11. The cabin air compressor assembly of claim 6 , further comprising:
a compressor rotor seal coupled to the cabin air compressor housing and positioned proximate the compressor rotor, wherein a ratio of a diameter of the compressor rotor seal to the diameter of one of the cooling airflow holes is between 12.56 and 15.59.

12. A method of assembling a cabin air compressor assembly comprising:
receiving a journal bearing in a journal bearing bore of a journal bearing support of a cabin air compressor housing;
coupling a compressor rotor seal to the cabin air compressor housing;
positioning a compressor rotor supported by the journal bearing proximate an interior portion of the cabin air compressor housing to form a mixing chamber, the mixing chamber configured to receive a bearing cooling flow through the journal bearing bore and a portion of air flow that leaks past the compressor rotor seal, the interior portion of the cabin air compressor housing comprising a plurality of cooling airflow holes to establish a cooling outlet flow, the cabin air compressor housing having a ratio of a diameter of the journal bearing bore to a diameter of one of the cooling airflow holes between 3.64 and 4.52 wherein the plurality of cooling airflow holes are radially positioned about an axis of the cabin air compressor housing, and a ratio of a radius of the radial position of each of the cooling airflow holes to the diameter of each of the cooling airflow holes is between 4.05 and 5.38, and the plurality of cooling airflow holes comprises six cooling airflow holes spaced apart at an angle of 60 degrees; and
configuring a compressor volute of the cabin air compressor housing to direct a compressed flow produced by the compressor rotor to a compressor outlet, wherein a fillet radius is positioned between the compressor volute and the compressor outlet, a compressor volute inner radius is proximate the compressor outlet, a compressor volute center radius is proximate the compressor outlet, a compressor volute outer radius is proximate the compressor outlet, and a ratio of the compressor volute inner radius to the fillet radius is between 8.88 and 9.97.

13. The method of claim 12 , wherein a ratio of the compressor volute center radius to the fillet radius is between 11.78 and 13.19, and a ratio of the compressor volute outer radius to the fillet radius is between 14.94 and 16.67.

14. The method of claim 12 , wherein a ratio of a diameter of the compressor rotor seal to the diameter of one of the cooling airflow holes is between 12.56 and 15.59.

Assignees

• Beers Craig M
• Rosen Seth E
• Hamilton Sundstrand Corp

Inventors

• Beers Craig M
• Rosen Seth E

Classifications

• F04D25/06

  the pump being electrically driven (F04D25/08 takes precedence) · CPC title

• F04D29/057

  hydrostatic; hydrodynamic · CPC title

• F04D25/082 Primary

  the unit having provision for cooling the motor · CPC title

• F04D29/4206

  especially adapted for elastic fluid pumps · CPC title

• F04D29/5806

  Cooling the drive system · CPC title