FAN ROTOR RING FOR AN AIR CYCLE MACHINE

• US 20120156021A1
• Filed: 12/21/2010
• Published: 06/21/2012
• Est. Priority Date: 12/21/2010
• Status: Abandoned Application

• Current Assignee: Hamilton Sundstrand Corporation (Rtx Corporation)
• Original Assignee: Hamilton Sundstrand Corporation (Rtx Corporation)
• Inventors: Lugo, Valentina, Binek, Lawrence, Richardson, Victoria S.
• Application Number:
  US12/974,286
• Publication Number:
  US 20120156021A1
• Time in Patent Office: Days
• US Class Current: 415/203
• CPC Class Codes: F04D 29/263 mounting fan or blower rotors on shafts
• CPC Class Codes: F04D 29/321 for axial flow compressors
• CPC Class Codes: Y10T 29/49323 Assembling fluid flow directing devices, e.g., stators, diaphragms, nozzles

Abstract

A fan rotor ring for an air cycle machine includes a ring body that defines a main bore having a main bore diameter and central axis. An annular flange extends axially from the ring body over a length and defines a fan ring bore having a fan ring bore inner diameter. A ratio of the fan ring bore inner diameter to the length of the annular flange is 1.63-1.69.

Claims

1. A fan rotor ring for an air cycle machine, the fan rotor ring comprising:

a ring body defining a main bore having a main bore diameter D_R1 and central axis; and

an annular flange extending axially from the ring body over a length L and defining a fan ring bore having a fan ring bore inner diameter D_R2, where a ratio D_R2/L is 1.63-1.69.

2. The fan rotor ring as recited in claim 1, wherein a ratio D_R2/D_R1 is 2.043-2.054.

3. The fan rotor ring as recited in claim 1, wherein the main bore and the fan ring bore each include an edge having a chamfer.

4. The fan rotor ring as recited in claim 1, wherein the annular flange includes a circumferential groove.

5. The fan rotor ring as recited in claim 1, wherein the annular flange defines an outer diameter D_R0 such that a ratio D_R0/D_R2 is 1.290-1.295.

6. An air cycle machine comprising:

a main shaft having a compressor rotor and a turbine rotor mounted for rotation thereon;

a fan rotor mounted on the main shaft and including;

a rotor body having a plurality of fan blades for rotation about a central axis and a radially inwardly extending annular wall; and

a hub body extending axially from the annular wall and defining a first cylindrical hub portion and a second cylindrical hub portion, the second cylindrical hub portion defining an outer diameter D₂; and

a fan rotor ring mounted on the fan rotor and including;

a ring body defining a main bore having a main bore diameter D_R2 that receives the main shaft; and

an annular flange extending axially from the ring body over a length L and defining a fan ring bore having a fan ring bore inner diameter D_R1 receiving the second cylindrical hub portion of the hub body, where a ratio D₂/D_R2 is 1.002-1.007.

7. The air cycle machine as recited in claim 6, wherein a ratio D_R2/D_R1 is 2.043-2.054.

8. The air cycle machine as recited in claim 6, wherein a ratio D_R2/L is 1.63-1.69.

9. The air cycle machine as recited in claim 6, wherein the annular flange defines an outer diameter D_R0 such that a ratio D_R0/D_R2 is 1.290-1.295.

11. The method as recited in claim 9, including extending a main shaft having a compressor rotor and a turbine rotor mounted for rotation thereon through the central hub bore of the fan rotor and the main bore of the fan rotor ring.

13. The method as recited in claim 9, including providing a ratio D₂/D_R2 that is 1.002-1.007, wherein the securing of the fan rotor ring on the fan rotor includes inserting the second cylindrical hub portion of the hub body into the fan ring bore of the fan ring.

14. The method as recited in claim 9, including providing a ratio D_R2/D_R1 that is 2.043-2.054.

15. The method as recited in claim 9, including, wherein the annular flange defines an outer diameter D_R0 such that a ratio D_R0/D_R2 is 1.290-1.295.

10. A method of installing a fan rotor ring in an air cycle machine, the method comprising:

securing a fan rotor ring on a fan rotor of an air cycle machine, the fan rotor including;

a rotor body having a plurality of fan blades for rotation about a central axis and a radially inwardly extending annular wall; and

a hub body extending axially from the annular wall and defining the central hub bore with a hub bore diameter D_b, the hub body further defining a first cylindrical hub portion around the central hub bore on one axial side of the annular wall and a second cylindrical hub portion around the central hub bore on an opposite axial side of the annular wall, the first cylindrical hub portion defining a first outer diameter D₁ and the second cylindrical portion defining a second outer diameter D₂; and

the fan rotor ring including;

a ring body defining a main bore having a main bore diameter D_R2; and

an annular flange extending axially from the ring body over a length L and defining a fan ring bore having a fan ring bore inner diameter D_R1; and

wherein a ratio D_R2/L is 1.63-1.69.

12. The method as recited in claim 10, including securing a nut on the main shaft to secure the main shaft, fan rotor, and fan rotor ring together for co-rotation with the compressor rotor and the turbine rotor.