Turbine nozzle for air cycle machine

Patent metadata

Field	Value
Publication number	US-10006299-B2
Application number	US-201313869048-A
Country	US
Kind code	B2
Filing date	Apr 24, 2013
Priority date	Apr 24, 2013
Publication date	Jun 26, 2018
Grant date	Jun 26, 2018

Abstract

A nozzle for use in an air cycle machine has a plate. A plurality of vanes extend away from the plate. The plurality of vanes extend for a height away from the plate. A width is defined as the closest distance between two adjacent vanes. A ratio of the height to the width is between 3.253 and 3.800. An air cycle machine and a method of repair are also disclosed.

First claim

The invention claimed is:

1. A nozzle for use in an air cycle machine comprising:
a plate;
a plurality of vanes extending 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 3.253 and 3.800;
wherein there are 17 circumferentially spaced ones of said vanes; and
wherein a total flow area is defined between all 17 of said vanes and said total flow area being between 5.508 and 6.434 square inches (35.535-41.509 square centimeters).

2. The nozzle as set forth in claim 1 , wherein said plate is 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 nozzle combination provided adjacent said second stage turbine rotor with said nozzle being at a location upstream of said second stage turbine rotor;
the nozzle including a plurality of vanes extending in an axial direction away from a 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 3.253 and 3.800;
wherein there are 17 circumferentially spaced ones of said vanes; and
wherein a total flow area is defined between all 17 of said vanes and said total flow area being between 5.508 and 6.434 square inches (35.535-41.509 square centimeters).

4. The air cycle machine as set forth in claim 3 , wherein said plate is 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 from a location adjacent a second stage turbine rotor in an air cycle machine, and replacing said removed nozzle with a replacement nozzle; and
(b) the replacement nozzle including a plate, and a plurality of vanes extending 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 3.253 and 3.800;
wherein there are 17 circumferentially spaced ones of said vanes; and
wherein a total flow area is defined between all 17 of said vanes and said total flow area being between 5.508 and 6.434 square inches (35.535-41.509 square centimeters).

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

Assignees

• Hamilton Sundstrand Corp

Inventors

• Beers Craig M
• Mcauliffe Christopher

Classifications

• F05D2230/80

  Repairing, retrofitting or upgrading methods · CPC title

• F01D5/141

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

• F01D5/288

  Protective coatings for blades · CPC title

• F02C1/02

  the working fluid being an unheated pressurised gas · CPC title

• F01D5/005

  Repairing methods or devices · CPC title