An air cycle machine includes two turbines and a compressor mounted on an integral shaft. The integral shaft includes a plurality of shaft sections that are welded together and machined in a single set-up process into a desired shaft shape to provide highly aligned bearing surfaces. The shaft includ
An air cycle machine includes two turbines and a compressor mounted on an integral shaft. The integral shaft includes a plurality of shaft sections that are welded together and machined in a single set-up process into a desired shaft shape to provide highly aligned bearing surfaces. The shaft includes three stops that cooperate with three fasteners to secure the two turbines and the compressor on the shaft.
대표청구항▼
1. An air cycle machine (ACM) comprising: a shaft including a first shaft section having a first shaft section diameter, wherein the first shaft section comprises a first stop segment having a first axially facing surface, the first stop segment being connected to a second shaft section having a sec
1. An air cycle machine (ACM) comprising: a shaft including a first shaft section having a first shaft section diameter, wherein the first shaft section comprises a first stop segment having a first axially facing surface, the first stop segment being connected to a second shaft section having a second shaft section diameter that is larger than the first shaft section diameter; anda first turbine mounted on said first shaft section adjacent said first axially facing surface. 2. The ACM as recited in claim 1, wherein said shaft includes a third shaft section having a third shaft section diameter, wherein the third shaft section comprises a second stop segment having a second axially facing surface, the second stop segment being connected to a fourth shaft section having a fourth shaft section diameter that is larger than the third shaft section diameter. 3. The ACM as recited in claim 2, wherein said first axially facing surface faces in an opposite direction from said second axially facing surface. 4. The ACM as recited in claim 2, wherein each of said first shaft section and said third shaft section each include a threaded end portion. 5. The ACM as recited in claim 2, wherein said shaft includes a third stop segment defined by a fifth shaft section that is mounted between said second shaft section and said fourth shaft section. 6. The ACM as recited in claim 5, including a compressor mounted on said shaft adjacent said third stop segment. 7. The ACM as recited in claim 5, wherein at least one of said first shaft section, said second shaft section, said third shaft section, said fourth shaft section, or said fifth shaft section are hollow. 8. The ACM as recited in claim 1, wherein said shaft includes an internal cavity. 9. The ACM as recited in claim 1, wherein said second shaft section includes a journal bearing surface. 10. An air cycle machine (ACM) comprising: a shaft formed from a plurality of shaft sections including at least a first shaft section having a first shaft section diameter and a second shaft section having a second shaft section diameter that is greater than said first shaft section diameter, wherein said plurality of shaft sections are connected by at least one welded joint;a first turbine mounted on said shaft;a second turbine mounted on said shaft; anda compressor mounted on said shaft between said first turbine and said second turbine. 11. The ACM as recited in claim 10, wherein said plurality of shaft sections are electron-beam welded together. 12. The ACM as recited in claim 10, wherein at least one of said plurality of shaft sections is hollow. 13. The ACM as recited in claim 10, wherein said shaft includes an internal cavity. 14. The ACM as recited in claim 10, wherein said shaft includes first and second journal bearing surfaces that support radial loads on said shaft. 15. The ACM as recited in claim 14, wherein said shaft includes a radially extending flange between said first and second journal bearing surfaces that supports axial loads on said shaft. 16. The ACM as recited in claim 10, wherein said shaft includes a first stop, a second stop, and a third stop that secure, respectively, said first turbine, said second turbine, and said compressor on said shaft. 17. The ACM as recited in claim 7, wherein said first shaft section, said second shaft section, said third shaft section, said fourth shaft section, and said fifth shaft section are hollow. 18. The ACM as recited in claim 1, wherein a first stop segment diameter is the same as said second shaft section diameter. 19. The ACM as recited in claim 1, wherein the first stop segment is bonded to the first shaft section and the second shaft section at each end. 20. The ACM as recited in claim 5, wherein said third stop segment includes a third axially facing surface facing away from said fourth shaft section. 21. The ACM as recited in claim 5, wherein said fifth shaft section includes a threaded portion.
Coffinberry George A. (West Chester OH), Gas turbine engine powered aircraft environmental control system and boundary layer bleed with energy recovery system.
Claeys Henry M. (Lomita CA) Clarke Kathrine J. (Hermosa Beach CA) Matulich Dan S. (Rolling Hills Estates CA), Integrated power and cooling environmental control system.
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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