Turbine nozzle and shroud for air cycle machine

Patent metadata

Field	Value
Publication number	US-10087760-B2
Application number	US-201313869051-A
Country	US
Kind code	B2
Filing date	Apr 24, 2013
Priority date	Apr 24, 2013
Publication date	Oct 2, 2018
Grant date	Oct 2, 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 0.1091 and 0.1401. 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 0.1091 and 0.1401;
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 0.2148 and 0.2759 square inches (1.3856-1.7799 square 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 turbine rotor 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 turbine rotor with said nozzle being at a location upstream of said turbine rotor, and said shroud curving to a location downstream of said turbine rotor and said shroud and nozzle including a plate and said 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 0.1091 and 0.1401;
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 0.2148 and 0.2759 square inches (1.3856-1.7799 square centimeters).

4. The air cycle machine as set forth in claim 3 , wherein said nozzle is associated with a slider that moves relative to said nozzle dependent on flow condition to change a flow area, with said slider being movable between a closed position and a more open position, and said total flow area being defined at said closed position.

5. The air cycle machine as set forth in claim 4 , wherein said slider is biased to the more open position.

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

7. A method of repairing an air cycle machine comprising the steps of:
(a) removing a nozzle and shroud combination from a location adjacent a 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 0.1091 and 0.1401;
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 0.2148 and 0.2759 square inches (1.3856-1.7799 square centimeters).

Assignees

• Hamilton Sundstrand Corp

Inventors

• Beers Craig M
• Merritt Brent J

Classifications

• F01D5/147

  Construction, i.e. structural features, e.g. of weight-saving hollow blades (F01D5/148, F01D5/16 and F01D5/20 take precedence; blade shape F01D5/141; blades with cooling or heating channels or cavities F01D5/18; heating, heat-insulating or cooling means on blades F01D5/18) · CPC title

• F01D9/041

  using blades (F01D5/148 takes precedence) · CPC title

• F05D2230/90

  Coating; Surface treatment · CPC title

• F01D5/005 Primary

  Repairing methods or devices · CPC title

• F05D2260/95

  Preventing corrosion · CPC title