An air cycle machine includes a housing having a compressor housing portion. A shaft is supported by the housing and includes a thrust runner. A hydrodynamic thrust bearing is arranged adjacent to the thrust runner and includes upstream and downstream sides. A compressor rotor is mounted on the shaf
An air cycle machine includes a housing having a compressor housing portion. A shaft is supported by the housing and includes a thrust runner. A hydrodynamic thrust bearing is arranged adjacent to the thrust runner and includes upstream and downstream sides. A compressor rotor is mounted on the shaft. A seal is arranged between the compressor rotor and the compressor housing portion. An orifice is provided in the compressor housing portion at the downstream side of the hydrodynamic bearing. The orifice vents hot compressed air that may leak past the seal prior to reaching the hydrodynamic thrust bearing.
대표청구항▼
What is claimed is: 1. A compressor, comprising: a housing including a compressor housing portion; a shaft supported in the housing and having a thrust runner, a hydrodynamic thrust bearing adjacent to the thrust runner, the hydrodynamic thrust bearing having upstream and downstream sides, and a tu
What is claimed is: 1. A compressor, comprising: a housing including a compressor housing portion; a shaft supported in the housing and having a thrust runner, a hydrodynamic thrust bearing adjacent to the thrust runner, the hydrodynamic thrust bearing having upstream and downstream sides, and a turbine rotor and a compressor rotor mounted on the shaft; a seal arranged between the rotor and the housing portion, and an orifice in the housing at the downstream side of the hydrodynamic thrust bearing; and wherein the housing includes a turbine housing portion with the turbine rotor arranged in the turbine housing portion, the thrust runner arranged between the compressor and turbine housing portions, a first bearing exit cavity arranged between the compressor and turbine housing portions at the downstream side, the compressor housing having compressor and bearing sides respectively expose to the compressor rotor and the first bearing cavity. 2. The compressor according to claim 1, wherein a second turbine rotor is mounted on the shaft, the compressor rotor arranged between the turbine and second turbine rotor. 3. The compressor according to claim 1, wherein the turbine rotor is arranged in the housing, the housing providing a turbine inlet and turbine outlet, and a reverse J-tube arranged in the turbine inlet, the reverse J-tube providing fluid to the upstream side of the hydrodynamic thrust bearing. 4. The compressor according to claim 1, wherein the housing includes a turbine housing portion with the turbine rotor arranged in the turbine housing portion, the thrust runner arranged between the compressor and turbine housing portions, the turbine housing portion including a hole in fluid communication with a ram air outlet. 5. The compressor according to claim 1, wherein a second bearing exit cavity is provided by the turbine housing portion, a hole fluidly connecting the first and second bearing cavities, the second bearing cavity fluidly communicating with a ram air outlet. 6. The compressor according to claim 1, wherein the compressor housing portion is a compressor seal plate secured to the turbine housing portion by a fastener. 7. The compressor according to claim 6, wherein a diffuser is arranged at a compressor outlet and includes a diffuser backing plate, and the compressor seal plate is secured between the turbine housing portion and the diffuser backing plate. 8. The compressor according to claim 1, wherein the compressor housing portion is generally Y-shaped and includes first, second and third legs, the first let supporting the seal, the second leg providing the orifice, and the third leg secured to the turbine housing portion. 9. The compressor according to claim 1, wherein the shaft is hollow, the shaft including apertures permitting cooling fluid to flow through the hollow to the upstream side, the cooling fluid flowing through the hydrodynamic thrust bearing to the downstream side. 10. The compressor according to claim 9, wherein the housing includes a compressor outlet having compressed fluid, the compressed fluid acting on and leaking past the seal, the compressed fluid flowing through the orifice and commingling with the cooling fluid at the downstream side. 11. A method of cooling a hydrodynamic bearing in a compressor comprising the steps of: a) sealing between a compressor rotor and a compressor housing portion; b) flowing cooling fluid through a hydrodynamic bearing arranged between a thrust runner and the compressor housing portion; c) leaking hot compressed fluid from the compressor rotor past a seal; and d) flowing the hot compressed fluid through an orifice in the compressor housing portion to route the hot compressed fluid around the hydrodynamic bearing. 12. The method according to claim 11, comprising step e) merging the cooling fluid and the hot compressed fluid downstream from the hydrodynamic bearing relative to the cooling fluid flow. 13. The method according to claim 12, comprising step f) venting the cooling fluid and hot compressed fluid to a ram air outlet. 14. The method according to claim 11, wherein the seal is arranged between the compressor rotor and compressor housing portion.
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이 특허에 인용된 특허 (4)
Dziorny Paul J. (132 Strawberry La. Manchester CT 06040) McAuliffe Christopher (18 Kellogg St. Windsor CT 06095), Air cycle machine with interstage venting.
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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