Turbine nozzle for air cycle machine

Patent metadata

Field	Value
Publication number	US-10072519-B2
Application number	US-201313869053-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 for use in an air cycle machine has a 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 nozzle height to the nozzle width being between 0.3563 and 0.4051. An air cycle machine and a method 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 0.3563 and 0.4051;
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 0.3963 and 0.4505 square inches (2.5565-2.9066 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 turbine rotor configured to drive a shaft, and a compressor rotor driven by said shaft, and a fan rotor driven by said shaft;
a nozzle provided adjacent said turbine rotor with said nozzle being at a location upstream of said turbine rotor;
said nozzle including a 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 0.3563 and 0.4051;
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 0.3963 and 0.4505 square inches (2.5565-2.9066 centimeters).

4. The air cycle machine as set forth in claim 3 , wherein said nozzle is a primary nozzle and is associated with a slider that moves relative to said primary 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 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 from a location adjacent a turbine rotor in an air cycle machine, and replacing said removed nozzle with a replacement nozzle;
(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 0.3563 and 0.4051;
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 0.3963 and 0.4505 square inches (2.5565-2.9066 centimeters).

8. The method as set forth in claim 7 , 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
• Merritt Brent J

Classifications

• F01D17/165 Primary

  for radial flow, i.e. the vanes turning around axes which are essentially parallel to the rotor centre line (F01D17/167 takes precedence) · CPC title