A fan rotor includes a rotor body that has plurality of fan blades for rotation about a central axis. An annular wall extends radially inward from the rotor body. A hub body extends axially from the annular wall and defines a central hub bore with a hub bore diameter Db. The hub body further defines
A fan rotor includes a rotor body that has plurality of fan blades for rotation about a central axis. An annular wall extends radially inward from the rotor body. A hub body extends axially from the annular wall and defines a central hub bore with a hub bore diameter Db. The hub body further defines a first cylindrical hub portion on one axial side of the annular wall and a second cylindrical hub portion on an opposite side of the annular wall. A ratio of the outer diameter of the first cylindrical hub portion to a diameter of the central hub bore is 1.996-2.007, and a ratio of the second cylindrical hub portion outer diameter to the hub bore diameter is 2.051-2.063.
대표청구항▼
1. A fan rotor comprising: a rotor body having a plurality of fan blades for rotation about a central axis and a radially inwardly extending annular wall; anda hub body extending axially from the annular wall and defining a central hub bore with a hub bore diameter Db, the hub body further defining
1. A fan rotor comprising: a rotor body having a plurality of fan blades for rotation about a central axis and a radially inwardly extending annular wall; anda hub body extending axially from the annular wall and defining a central hub bore with a hub bore diameter Db, 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 hub portion defining a second outer diameter D2, where a ratio D1/Db is 1.996-2.007 and a ratio D2/Db is 2.051-2.063;wherein the hub body includes a first circumferential groove located between the first cylindrical hub portion and the annular wall, and a second circumferential groove located between the second cylindrical hub portion and the annular wall. 2. The fan rotor as recited in claim 1, wherein each of the first circumferential groove and the second circumferential groove define a radius of curvature Rc and meet an outer peripheral surface of the respective first cylindrical hub portion or second cylindrical hub portion at a complimentary angle alpha (α) such that a ratio alpha/Rc is 1055-1378 degrees per inch. 3. The fan rotor as recited in claim 1, wherein the first circumferential groove and the second circumferential groove each have a semi-circular cross-section. 4. The fan rotor as recited in claim 1, wherein the first cylindrical hub portion includes a chamfer. 5. The fan rotor as recited in claim 1, wherein the rotor body includes an axially extending wall having a cylindrical outer surface and defining a non-uniform radial thickness. 6. The fan rotor as recited in claim 1, wherein the rotor body defines a first rotor body portion that extends axially at a radially outer end of the annular wall. 7. An air cycle machine comprising: a main shaft having a compressor rotor and a turbine rotor mounted for rotation thereon;a thrust shaft mounted on the main shaft, the thrust shaft having a shaft body defining a disk at a first end and a cylindrical shaft portion extending from the disk to a second end, the shaft body having a shaft bore defining a shaft bore diameter Ds; anda fan rotor mounted on the cylindrical shaft portion and including: a rotor body having a plurality of fan blades for rotation about a central axis and a radially inwardly extending annular wall; anda hub body extending axially from the annular wall and defining a central hub bore with a hub bore diameter Db, the hub body further defining a first cylindrical hub portion around the central hub bore on one axial side of the annular wall which is received into the shaft bore of the thrust shaft 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 such that a ratio D1/Ds is 1.002-1.007;wherein the hub body includes a first circumferential groove located between the first cylindrical hub portion and the annular wall, and a second circumferential groove located between the second cylindrical hub portion and the annular wall. 8. The air cycle machine as recited in claim 7, further comprising a fan rotor ring that is mounted over the second cylindrical hub portion of the hub body, the fan rotor ring having a fan ring bore with a fan ring bore diameter DR2, and the second cylindrical hub portion defining a second outer diameter D2 such that a ratio D2/DR2 is 1.002-1.007. 9. The air cycle machine as recited in claim 7, wherein the second cylindrical hub portion defines a second outer diameter D2 such that D2/Db is 2.051-2.063. 10. The air cycle machine as recited in claim 7, wherein a ratio D1/Db is 1.996-2.007. 11. The air cycle machine as recited in claim 7, wherein each of the first circumferential groove and the second circumferential groove define a radius of curvature Rc and meet an outer peripheral surface of the respective first cylindrical hub portion or second cylindrical hub portion at a complimentary angle alpha (α) such that a ratio alpha/Rc is 1055-1378 degrees per inch. 12. The air cycle machine as recited in claim 7, wherein the first circumferential groove and the second circumferential groove each have a semi-circular cross-section. 13. A method of installing a fan rotor on an air cycle machine, the method comprising: extending a main shaft having a compressor rotor and a turbine rotor mounted for rotation thereon through a central hub bore of a fan rotor that includes: a rotor body having a plurality of fan blades for rotation about a central axis and a radially inwardly extending annular wall; anda hub body extending axially from the annular wall and defining the central hub bore with a hub bore diameter Db, 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;inserting the first cylindrical hub portion of the fan rotor into a shaft bore of a cylindrical shaft portion of a thrust shaft that is mounted on the main shaft, the thrust shaft having a shaft body defining a disk at a first end and the cylindrical shaft portion extending from the disk to a second end, the shaft bore having a shaft bore diameter Ds such that a ratio D1/Ds is 1.002-1.007;securing a nut on the main shaft to secure the main shaft, thrust shaft, and fan rotor together for co-rotation with the compressor rotor and the turbine rotor;wherein the hub body includes a first circumferential groove located between the first cylindrical hub portion and the annular wall, and a second circumferential groove located between the second cylindrical hub portion and the annular wall. 14. The method as recited in claim 13, further comprising, prior to securing the nut on the main shaft, inserting a fan rotor ring on the fan rotor by inserting the second cylindrical hub portion of the hub body into a fan ring bore of the fan rotor ring, the fan ring bore having a fan ring bore diameter DR2 such that a ratio D2/DR2 is 1.002-1.007. 15. The method as recited in claim 13, wherein each of the first circumferential groove and the second circumferential groove define a radius of curvature Rc and meet an outer peripheral surface of the respective first cylindrical hub portion or second cylindrical hub portion at a complimentary angle alpha (α) such that a ratio alpha/Rc is 1055-1378 degrees per inch. 16. The method as recited in claim 13, wherein the first circumferential groove and the second circumferential groove each have a semi-circular cross-section.
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이 특허에 인용된 특허 (7)
Dziorny Paul J. (Manchester CT) McAuliffe Christopher (Windsor CT), Air cycle machine alignment.
Army ; Jr. Donald E. (Springfield MA) McAuliffe Christopher (Windsor CT) Crabtree William C. (Tariffville CT), Air cycle machine and fan inlet/diffuser therefor.
Merritt Brent J. (Westfield MA) Dziorny Paul J. (Manchester CT), Air cycle machine with heat isolation having back-to-back turbine and compressor rotors.
Maher ; Jr. John F. (Enfield CT) Merritt Brent J. (Westfield MA) McAuliffe Christopher (Windsor CT) Dziorny Paul J. (Manchester CT), Four wheel air cycle machine.
Carter Michael E. ; Crabtree Ronald E. ; Emerson Terrence P. ; Moreno Arturo ; Morris Terry ; Rapozo Raymond ; Saville Marshall, Two spool air cycle machine having concentric shafts.
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