Fan shroud

Patent metadata

Field	Value
Publication number	US-9964120-B2
Application number	US-201614989175-A
Country	US
Kind code	B2
Filing date	Jan 6, 2016
Priority date	Jan 6, 2016
Publication date	May 8, 2018
Grant date	May 8, 2018

Abstract

A fan shroud for an air cycle machine includes a tubular body extending axially between a first end and a second end of the shroud along a center axis of the fan shroud. A flange extends radially outward from the tubular body of the shroud at the first end of the shroud. At least one mounting hole extends through the flange. A sight hole extends through the flange and is positioned radially inward from the at least one mounting hole relative the center axis.

First claim

The invention claimed is:

1. A fan shroud for an air cycle machine, the fan shroud comprising:
a tubular body extending axially between a first end and a second end of the fan shroud along a center axis of the fan shroud;
a flange extending radially outward from the tubular body of the fan shroud at the first end of the fan shroud;
at least one mounting hole extending through the flange; and
a sight hole extending through the flange and positioned radially inward from the at least one mounting hole relative the center axis.

2. The fan shroud of claim 1 , wherein the sight hole comprises a diameter D 1 , wherein the sight hole is spaced radially on the flange a distance D 2 from the center axis of the fan shroud, and wherein a ratio of the diameter D 1 of the sight hole and the distance D 2 is 0.0570 to 0.0600.

3. The fan shroud of claim 2 , wherein the flange comprises an outer radius D 3 , and wherein a ratio of the distance D 2 and the outer radius D 3 of the flange is 0.8967 to 0.9004.

4. The fan shroud of claim 3 , wherein the tubular body of the shroud comprises an inner diameter D 4 , and wherein a ratio of the outer radius D 3 of the flange and the inner diameter D 4 of the tubular body is 0.6772 to 0.6779.

5. The fan shroud of claim 4 , wherein the tubular body of the shroud comprises a radial thickness D 5 , and wherein a ratio of the inner diameter D 4 of the tubular body and the radial thickness D 5 of the tubular body is 33.7806 to 38.8296.

6. The fan shroud of claim 1 , wherein the flange of the fan shroud comprises a first side and a second side and a recess formed on the first side of the flange and around the at least one mounting hole.

7. A fan housing for an air cycle machine, the fan housing comprising:
a fan exit flow passage;
a ring disposed around a center axis of the fan housing and disposed around the fan exit flow passage; wherein the ring comprises:
a first end disposed axially opposite a second end, wherein the first end is disposed downstream from the second end; and
a shelf disposed radially inward from the first end of the ring and disposed upstream from the first end of the ring and downstream from the second end of the ring; and

a fan shroud, the fan shroud comprising:
a tubular body extending axially from a first end to a second end of the fan shroud along the center axis of the fan housing, wherein the second end of the fan shroud extends toward the shelf of the ring;
a flange extending radially outward from the tubular body of the fan shroud at the first end of the fan shroud, wherein the flange is disposed proximate the first end of the ring;
at least one mounting hole extending through the flange; and
a sight hole extending through the flange and positioned radially inward from the at least one mounting hole and radially inward from the first end of the ring.

8. The fan housing of claim 7 , wherein the fan housing further comprising:
a containment ring disposed radially between the ring and the fan shroud.

9. The fan housing of claim 8 , wherein the sight hole is radially aligned with at least a portion of the containment ring.

10. The fan housing of claim 7 , wherein the sight hole comprises a diameter D 1 , wherein the sight hole is spaced radially on the flange a distance D 2 from the center axis of the fan shroud, and wherein a ratio of the diameter D 1 of the sight hole and the distance D 2 is 0.0570 to 0.0600.

11. The fan housing of claim 10 , wherein the flange comprises an outer radius D 3 , and wherein a ratio of the distance D 2 and the outer radius D 3 of the flange is 0.8967 to 0.9004.

12. The fan housing of claim 11 , wherein the tubular body of the shroud comprises an inner diameter D 4 , and wherein a ratio of the outer radius D 3 of the flange and the inner diameter D 4 of the tubular body is 0.6772 to 0.6779.

13. The fan housing of claim 12 , wherein the tubular body of the shroud comprises a radial thickness D 5 , and wherein a ratio of the inner diameter D 4 of the tubular body and the radial thickness D 5 of the tubular body is 33.7806 to 38.8296.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Chrabascz Eric
• Rosen Seth E

Classifications

• B64D2013/0648

  with energy recovery means, e.g. using turbines · CPC title

• B64D13/06

  the air being conditioned (pressurising B64D13/02) · CPC title

• F04D29/644

  especially adapted for elastic fluid pumps · CPC title

• B64D2013/0688

  with means for recirculating cabin air · CPC title

• F04D29/4226

  Fan casings · CPC title