Turbine nozzle and shroud for air cycle machine

Patent metadata

Field	Value
Publication number	US-10072502-B2
Application number	US-201313869050-A
Country	US
Kind code	B2
Filing date	Apr 24, 2013
Priority date	Apr 24, 2013
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

A nozzle and shroud for use in an air cycle machine has a plate and a shroud curving in a first axial direction about a center axis of the shroud relative to the plate. A plurality of vanes extends in a second axial direction away from the plate. The plurality of vanes extends for a height away from the plate and a width defined as the closest distance between two adjacent vanes, with a ratio of the height to the width being between 1.3653 and 1.7992. An air cycle machine and a method of repair are also disclosed.

First claim

The invention claimed is:

1. A nozzle and shroud for use in an air cycle machine comprising:
a plate and a shroud curving in a first axial direction about a center axis of said shroud relative to said plate;
a plurality of vanes extending in a second axial direction away from said plate, with said plurality of vanes extending for a height away from said plate and a width being defined as the closest distance between two adjacent vanes, with a ratio of said height to said width being between 1.3653 and 1.7992;
wherein there are 19 circumferentially spaced ones of said vanes; and
wherein a total flow area is defined between all 19 of said vanes and said total flow area being between 1.6802 to 2.2141 square inches (10.840-14.284 centimeters).

2. The nozzle and shroud as set forth in claim 1 , wherein said plate and said shroud are formed of a base aluminum material provided with a tungsten carbide erosion coating.

3. An air cycle machine comprising:
a first stage turbine rotor and a second stage turbine rotor, said first and second stage turbine rotors being configured to drive a shaft, and a compressor rotor driven by said shaft, and a fan rotor driven by said shaft;
a shroud and nozzle combination provided adjacent said first stage turbine rotor with said nozzle being at a location upstream of said first stage turbine rotor, and said shroud curving to a location downstream of said first stage turbine rotor and said shroud and nozzle including a plate and a shroud curving in a first axial direction about a center axis of said shroud relative to said plate;
a plurality of vanes extending in a second axial direction away from said plate, with said plurality of vanes extending for a height away from said plate and a width being defined as the closest distance between two adjacent vanes, with a ratio of said height to said width being between 1.3653 and 1.7992;
wherein there are 19 circumferentially spaced ones of said vanes; and
wherein a total flow area is defined between all 19 of said vanes and said total flow area being between 1.6802 to 2.2141 square inches (10.840-14.284 centimeters).

4. The air cycle machine as set forth in claim 3 , wherein said plate and said shroud are formed of a base aluminum material provided with a tungsten carbide erosion coating.

5. A method of repairing an air cycle machine comprising the steps of:
(a) removing a nozzle and shroud combination from a location adjacent a first stage turbine rotor in an air cycle machine, and replacing said removed shroud and nozzle combination with a replacement shroud and nozzle combination;
(b) the replacement nozzle and shroud combination including a plate and a shroud curving in a first axial direction about a center axis of said shroud relative to said plate, and a plurality of vanes extending in a second axial direction away from said plate, with said plurality of vanes extending for a height away from said plate and a width being defined as the closest distance between two adjacent vanes, with a ratio of said height to said width being between 1.3653 and 1.7992;
wherein there are 19 circumferentially spaced ones of said vanes; and
wherein a total flow area is defined between all 19 of said vanes and said total flow area being between 1.6802 to 2.2141 square inches (10.840-14.284 centimeters).

6. The method as set forth in claim 5 , wherein said plate and said shroud are formed of a base aluminum material provided with a tungsten carbide erosion coating.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Beers Craig M
• Merritt Brent J

Classifications

• F05D2230/80

  Repairing, retrofitting or upgrading methods · CPC title

• F01D9/045

  for radial flow machines or engines · CPC title

• F01D5/005 Primary

  Repairing methods or devices · CPC title

• F01D5/288

  Protective coatings for blades · CPC title

• F01D5/141

  Shape, i.e. outer, aerodynamic form (F01D5/148 - F01D5/20 take precedence; blade construction F01D5/147) · CPC title