US20130280042A1 - Journal bearing with dual pass cooling for air machine - Google Patents
Journal bearing with dual pass cooling for air machine Download PDFInfo
- Publication number
- US20130280042A1 US20130280042A1 US13/923,661 US201313923661A US2013280042A1 US 20130280042 A1 US20130280042 A1 US 20130280042A1 US 201313923661 A US201313923661 A US 201313923661A US 2013280042 A1 US2013280042 A1 US 2013280042A1
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- US
- United States
- Prior art keywords
- shaft
- air
- outer periphery
- cooling air
- inner bore
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
- 238000001816 cooling Methods 0.000 title claims abstract description 36
- 230000009977 dual effect Effects 0.000 title description 3
- 239000011888 foil Substances 0.000 claims description 7
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D13/00—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft
- B64D13/06—Arrangements or adaptations of air-treatment apparatus for aircraft crew or passengers, or freight space, or structural parts of the aircraft the air being conditioned
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
- F01D25/125—Cooling of bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/057—Bearings hydrostatic; hydrodynamic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/40—Application in turbochargers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C37/00—Cooling of bearings
- F16C37/002—Cooling of bearings of fluid bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D2300/00—Special features for couplings or clutches
- F16D2300/02—Overheat protection, i.e. means for protection against overheating
- F16D2300/021—Cooling features not provided for in group F16D13/72 or F16D25/123, e.g. heat transfer details
- F16D2300/0212—Air cooling
Definitions
- This application relates to an air machine in which an air-driven turbine drives an air compressor, wherein journal bearings for a central shaft are provided with a dual path cooling.
- Air machines include a turbine driving a compressor. Partially compressed air is delivered to the compressor, and the compressor is driven to further compress this air. This compressed air is passed downstream to drive a turbine, with the turbine in turn driving the compressor as the air expands across the turbine. This expanded air is then utilized for a downstream use, such as cabin air for an aircraft.
- the known air machines have a shaft which connects the compressor and the turbine. Journal bearings are provided for this shaft.
- an air cooling system was provided to pass air between the inner periphery of the journal bearing, and the outer periphery of the shaft.
- An air supply machine has a compressor rotor for compressing air and delivering the compressed air to a downstream inlet. Air from the downstream inlet passes across a turbine rotor to drive the turbine rotor to rotate.
- the turbine rotor is connected to the compressor rotor such that rotation of the turbine rotor drives the compressor rotor to rotate and compress the air.
- a shaft is connected to rotate with the turbine rotor and the compressor rotor.
- the shaft is hollow with an inner bore and an outer periphery.
- At least one journal bearing is positioned to support a portion of the shaft, and to have an inner bore spaced from the outer periphery of the shaft.
- a cooling air path provides cooling air between the outer periphery of the shaft and the inner periphery of the bearing, and along a length of the bearing to at least one connection hole.
- the connection hole provides cooling air from an outer periphery of the shaft to the inner bore of the shaft. The cooling air then passes through the inner bore of the shaft and along a length of the bearing.
- a shaft for use in an air supply machine includes a hollow interior, with a connection hole for communicating cooling air from an outer periphery of the shaft to an inner bore of the shaft.
- FIG. 1 schematically shows a system incorporating the present invention.
- FIG. 2 shows a detail of the FIG. 1 system.
- FIG. 3 is a cross-sectional view along line 3 - 3 as shown in FIG. 2 .
- FIG. 1 An air machine 18 is illustrated in FIG. 1 having an air inlet 20 receiving partially compressed air, such as downstream of the compressor in a gas turbine engine. This air is delivered to another compressor impeller or rotor 22 , where it is further compressed and delivered into a discharge plenum 24 . From the discharge plenum 24 , the air passes through a heat exchanger 26 .
- a fan 27 is driven by a shaft 28 , which is a hollow shaft having an interior bore 30 . While the shaft is shown in this embodiment as several distinct components, it should be understood that the term “shaft” could extend to all of the components from the left-hand side of this Figure up to a turbine rotor or impeller 34 , and then to the compressor rotor 22 .
- An interior bore 30 is formed in the hollow shaft 28 .
- a central tie shaft 32 ties the fan 27 to the turbine impeller 34 and the compressor impeller 22 .
- Compressed air from the discharge plenum 24 thus passes through the heat exchanger 26 , is cooled by the fan 27 , and returned to an inlet plenum 134 downstream of the compressor rotor 22 , where it then passes over the turbine rotor 34 .
- the air is expanded and the turbine rotor 34 is driven to drive the compressor rotor 22 and the fan 27 .
- This expanded air then passes into a discharge plenum 36 , and then to a downstream use 38 .
- One example use of downstream use 38 would be a cabin air supply for an aircraft.
- a cooling air supply is tapped at 40 from the inlet plenum 134 and passes into a cooling path, and is split into paths 103 and 105 to both sides of a thrust bearing cylindrical member 46 , which is perpendicular to, and driven to rotate with, the shaft 28 .
- the air passes between the member 46 and a housing 44 , through a tortuous path 54 , and then to cool an interface surface between a journal bearing 56 , and the outer periphery of the shaft 28 .
- the air passes along the surface, through a connection hole 58 in the shaft 28 , and into an interior bore between an outer periphery of the tie shaft 32 , and the inner bore 30 of the shaft 28 .
- both bearings 48 and 56 , and the associated shaft surfaces, are provided with dual cooling air flow paths.
- Communication holes 200 extend back outwardly of the shaft 28 , to communicate the air from the inner bore outwardly of and to the ultimate exit 52 .
- the cooling air path may pass along the entire length of the bearing 56 and the bearing 48 at both the inner and outer peripheral flow path portions.
- a length of the bearing refers to a portion of the length of the bearing, and may include the entire length of bearing 48 and/or bearing 56 .
- the bearing 56 (and 48 may be similarly structured) has a bearing foil 60 .
- the bearing foil 60 actually has corrugations that form flow paths 62 and 64 in an inner bore of the bearing 56 between an inner periphery of the bearing 56 and the outer periphery of the shaft 28 .
- the air bearing that provides the journal bearing is typically provided between the portions of the foil 60 which are spaced closest to the outer periphery of the shaft 28 .
- the cooling air flows in all of the spaces of flow paths 62 and 64 to cool both the bearing and the outer periphery of the shaft 28 .
- the air passes through one, or preferably several, connection holes 58 into the interior bore 30 .
- the shaft 28 has an outer diameter D 1
- the communication holes 58 have a diameter D 2 .
- the diameter D 2 ranges from 0.070-0.085′′ (1.77-2.15 mm).
- the d 1 is 0.50′′ (12.7 mm). All of these measurements are in an air machine wherein the D 1 is 0.90′′ (22.9 mm). Stated another way, the ratio of D 2 to D 1 is between 0.077 and 0.094. Further, the d 1 is less than the diameter D 1 , but greater than the diameter D 2 .
- a thrust bearing cooling system is disclosed in co-pending patent application Ser. No. 12/728313, entitled “Thrust Bearing Cooling Path” and filed on even date herewith.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Pulmonology (AREA)
- Aviation & Aerospace Engineering (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
A compressor rotor compresses air and delivers the compressed air to a downstream inlet and across a turbine rotor. A shaft rotates with the turbine rotor and the compressor rotor. The shaft is hollow with an inner bore and an outer periphery. At least one journal bearing supports a portion of the shaft, and has an inner bore spaced from the outer periphery of the shaft. A cooling air path is provided between the shaft outer periphery and the bearing inner periphery, and along a length of the bearing to at least one connection hole. The connection hole provides cooling air from an outer periphery of the shaft to the inner bore of the shaft. In a separate feature, a shaft for use in an air supply machine includes a hollow interior, with such a connection hole.
Description
- This application is a divisional of U.S. patent application Ser. No. 12/728306, which was filed Mar. 22, 2010.
- This application relates to an air machine in which an air-driven turbine drives an air compressor, wherein journal bearings for a central shaft are provided with a dual path cooling.
- Air machines are known and include a turbine driving a compressor. Partially compressed air is delivered to the compressor, and the compressor is driven to further compress this air. This compressed air is passed downstream to drive a turbine, with the turbine in turn driving the compressor as the air expands across the turbine. This expanded air is then utilized for a downstream use, such as cabin air for an aircraft.
- The known air machines have a shaft which connects the compressor and the turbine. Journal bearings are provided for this shaft. In the past, an air cooling system was provided to pass air between the inner periphery of the journal bearing, and the outer periphery of the shaft.
- An air supply machine has a compressor rotor for compressing air and delivering the compressed air to a downstream inlet. Air from the downstream inlet passes across a turbine rotor to drive the turbine rotor to rotate. The turbine rotor is connected to the compressor rotor such that rotation of the turbine rotor drives the compressor rotor to rotate and compress the air. A shaft is connected to rotate with the turbine rotor and the compressor rotor. The shaft is hollow with an inner bore and an outer periphery. At least one journal bearing is positioned to support a portion of the shaft, and to have an inner bore spaced from the outer periphery of the shaft. A cooling air path provides cooling air between the outer periphery of the shaft and the inner periphery of the bearing, and along a length of the bearing to at least one connection hole. The connection hole provides cooling air from an outer periphery of the shaft to the inner bore of the shaft. The cooling air then passes through the inner bore of the shaft and along a length of the bearing.
- In a separate feature, a shaft for use in an air supply machine includes a hollow interior, with a connection hole for communicating cooling air from an outer periphery of the shaft to an inner bore of the shaft.
- These and other features of the present invention can be best understood from the following specification and drawings, the following of which is a brief description.
-
FIG. 1 schematically shows a system incorporating the present invention. -
FIG. 2 shows a detail of theFIG. 1 system. -
FIG. 3 is a cross-sectional view along line 3-3 as shown inFIG. 2 . - An
air machine 18 is illustrated inFIG. 1 having anair inlet 20 receiving partially compressed air, such as downstream of the compressor in a gas turbine engine. This air is delivered to another compressor impeller orrotor 22, where it is further compressed and delivered into adischarge plenum 24. From thedischarge plenum 24, the air passes through aheat exchanger 26. Afan 27 is driven by ashaft 28, which is a hollow shaft having aninterior bore 30. While the shaft is shown in this embodiment as several distinct components, it should be understood that the term “shaft” could extend to all of the components from the left-hand side of this Figure up to a turbine rotor orimpeller 34, and then to thecompressor rotor 22. Aninterior bore 30 is formed in thehollow shaft 28. Acentral tie shaft 32 ties thefan 27 to theturbine impeller 34 and thecompressor impeller 22. - Compressed air from the
discharge plenum 24 thus passes through theheat exchanger 26, is cooled by thefan 27, and returned to aninlet plenum 134 downstream of thecompressor rotor 22, where it then passes over theturbine rotor 34. The air is expanded and theturbine rotor 34 is driven to drive thecompressor rotor 22 and thefan 27. This expanded air then passes into adischarge plenum 36, and then to adownstream use 38. One example use ofdownstream use 38 would be a cabin air supply for an aircraft. - A cooling air supply is tapped at 40 from the
inlet plenum 134 and passes into a cooling path, and is split intopaths cylindrical member 46, which is perpendicular to, and driven to rotate with, theshaft 28. To a side closest to therotors member 46 and ahousing 44, through atortuous path 54, and then to cool an interface surface between a journal bearing 56, and the outer periphery of theshaft 28. As shown, the air passes along the surface, through aconnection hole 58 in theshaft 28, and into an interior bore between an outer periphery of thetie shaft 32, and theinner bore 30 of theshaft 28. The air passes along the entire length of thebearing 56, and also bearing 48, before exiting at anexit 52. On the other hand, the air split on the opposed side of themember 46 passes between ahousing 42 and themember 46, and then within an interior bore of thebearing 48 and the outer periphery of theshaft 28. Thus, bothbearings -
Communication holes 200 extend back outwardly of theshaft 28, to communicate the air from the inner bore outwardly of and to theultimate exit 52. - As can be appreciated from the drawings, the cooling air path may pass along the entire length of the
bearing 56 and thebearing 48 at both the inner and outer peripheral flow path portions. However, for purposes of the claims in this application, the term “a length of the bearing” refers to a portion of the length of the bearing, and may include the entire length of bearing 48 and/or bearing 56. - As shown in
FIG. 2 , the bearing 56 (and 48 may be similarly structured) has abearing foil 60. As can be appreciated fromFIG. 3 , thebearing foil 60 actually has corrugations thatform flow paths bearing 56 between an inner periphery of thebearing 56 and the outer periphery of theshaft 28. The air bearing that provides the journal bearing is typically provided between the portions of thefoil 60 which are spaced closest to the outer periphery of theshaft 28. However, the cooling air flows in all of the spaces offlow paths shaft 28. As further shown inFIG. 2 , the air passes through one, or preferably several,connection holes 58 into the interior bore 30. - As can be appreciated from
FIG. 2 , theshaft 28 has an outer diameter D1, while thecommunication holes 58 have a diameter D2. In embodiments, the diameter D2 ranges from 0.070-0.085″ (1.77-2.15 mm). There are six holes, circumferentially equally spaced in a common axial plane. This common axial plane is spaced by a distance d1 from an end of the bearing 56. In the embodiment, the d1 is 0.50″ (12.7 mm). All of these measurements are in an air machine wherein the D1 is 0.90″ (22.9 mm). Stated another way, the ratio of D2 to D1 is between 0.077 and 0.094. Further, the d1 is less than the diameter D1, but greater than the diameter D2. - In addition, there is a nominal portion of the shaft at the diameter D1, and a
ditch 202 forming a smaller diameter portion in a plenum or chamber to collect air for delivery into thecommunication holes 58. - A thrust bearing cooling system is disclosed in co-pending patent application Ser. No. 12/728313, entitled “Thrust Bearing Cooling Path” and filed on even date herewith.
- Although an embodiment of this invention has been disclosed, a worker of ordinary skill in this art would recognize that certain modifications would come within the scope of this invention. For that reason, the following claims should be studied to determine the true scope and content of this invention.
Claims (16)
1. An air supply machine comprising:
a compressor rotor for compressing air and delivering compressed air to a downstream inlet, air from said downstream inlet passing across a turbine rotor to drive said turbine rotor to rotate, and said turbine rotor being connected to said compressor rotor such that rotation of said turbine rotor drives said compressor rotor to rotate and compress the air;
a shaft connected to rotate with said turbine rotor and said compressor rotor, said shaft being hollow with an inner bore and an outer periphery, and a journal bearing positioned to support a portion of said shaft, and to have an inner bore with an inner periphery spaced from said outer periphery of said shaft; and
a cooling air path to provide cooling air between said outer periphery of said shaft and said inner periphery of said journal bearing, and along a length of said journal bearing to at least one connection hole, said at least one connection hole providing cooling air from said outer periphery of said shaft to said inner bore of said shaft, the cooling air path then passing through said inner bore of said shaft and along a length of said journal bearing.
2. The air supply machine as set forth in claim 1 , wherein there are at least two of said journal bearings, with each of said journal bearings having cooling air flow at both an outer periphery of said shaft, and at an inner bore of said shaft.
3. The air supply machine as set forth in claim 2 , wherein the cooling air path passing along said outer periphery of said shaft in a first direction for a first of said journal bearings, and in a second direction for a second of said journal bearings, but the cooling air path within said inner bore of said shaft for both said first and second journal bearing being in a same direction.
4. The air supply machine as set forth in claim 3 , wherein the air passing along said inner bore of said shaft extending across said shaft to said connection hole at an end of one of said first and second journal bearing, and then passing along a length of both of said first and second journal bearings.
5. The air supply machine as set forth in claim 4 , wherein the cooling air passing to said second journal bearing extending to an exit downstream of the length of said second journal bearing, and said air passing along a length of both said first and second journal bearing also leaving said air supply machine through the same exit.
6. The air supply machine as set forth in claim 3 , wherein said journal bearing has an interior bearing foil forming a non-cylindrical inner face between said journal bearing and said outer periphery of said shaft.
7. The air supply machine as set forth in claim 6 , wherein said foil is generally corrugated.
8. The air supply machine as set forth in claim 1 , wherein the cooling air path is tapped from an inlet leading to said turbine rotor.
9. The air supply machine as set forth in claim 1 , wherein said air supply machine supplies air to a downstream use on an aircraft.
10. The air supply machine as set forth in claim 1 , wherein the cooling air path extends along the entire length of said journal bearing at both the outer periphery of said shaft, and the inner bore of said shaft.
11. The air supply machine as set forth in claim 1 , wherein a ratio of a diameter of said at least one connection hole to an outer diameter of said outer periphery of said shaft is between 0.077 and 0.094.
12. An air machine comprising:
a compressor rotor for compressing air and delivering compressed air to a downstream inlet, air from said downstream inlet passing across a turbine rotor to drive said turbine rotor to rotate, and said turbine rotor being connected to said compressor rotor such that rotation of said turbine rotor drives said compressor rotor to rotate and compress the air;
a shaft connected to rotate with said turbine rotor and said compressor rotor, said shaft being hollow with an inner bore, and an outer periphery, and at least two journal bearings positioned to support a portion of said shaft, and to each have an inner bore with an inner periphery spaced from said outer periphery of said shaft; and
a cooling air path to provide cooling air between said outer periphery of said shaft and said inner periphery of each said journal bearing, and along a length of one of said journal bearings to at least one connection hole, said at least one connection hole providing cooling air from said outer periphery of said shaft to said inner bore of said shaft, said cooling air then passing through said inner bore of said shaft and along a length of each of said journal bearings;
the cooling air path passing along said outer periphery of said shaft in a first direction for a first of said journal bearings, and in a second direction for a second of said journal bearings, but the cooling air path within said inner bore of said shaft for both said first and second journal bearing being in a same direction, the air passing along said inner bore of said shaft extending across said shaft to said at least one connection hole at an end of said first journal bearing, and then passing along a length of both of said first and second journal bearings, the cooling air passing to said second journal bearing extending to an exit downstream of the length of said second journal bearing, and the cooling air passing within the inner bore of the shaft also leaving said air machine through the same exit; and
said air machine supplying air to a downstream use on an aircraft.
13. The air machine as set forth in claim 12 , wherein the cooling air path extends along the entire length of said first and second journal bearings at both the outer periphery of said shaft, and the inner bore of said shaft.
14. The air machine as set forth in claim 12 , wherein at least one of said at least two journal bearings has an interior bearing foil forming a non-cylindrical inner face between said at least one journal bearing and said outer periphery of said shaft, and wherein said foil is generally corrugated.
15. The air machine as set forth in claim 12 , wherein the cooling air path is tapped from an inlet leading to said turbine rotor.
16. The air machine as set forth in claim 12 , wherein a ratio of a diameter of said at least one connection hole to an outer diameter of said outer periphery of said shaft is between 0.077 and 0.094.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US13/923,661 US20130280042A1 (en) | 2010-03-22 | 2013-06-21 | Journal bearing with dual pass cooling for air machine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US12/728,306 US8496533B2 (en) | 2010-03-22 | 2010-03-22 | Journal bearing with dual pass cooling for air machine |
US13/923,661 US20130280042A1 (en) | 2010-03-22 | 2013-06-21 | Journal bearing with dual pass cooling for air machine |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US12/728,306 Division US8496533B2 (en) | 2010-03-22 | 2010-03-22 | Journal bearing with dual pass cooling for air machine |
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US20130280042A1 true US20130280042A1 (en) | 2013-10-24 |
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US12/728,306 Active 2031-08-09 US8496533B2 (en) | 2010-03-22 | 2010-03-22 | Journal bearing with dual pass cooling for air machine |
US13/923,661 Abandoned US20130280042A1 (en) | 2010-03-22 | 2013-06-21 | Journal bearing with dual pass cooling for air machine |
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US12/728,306 Active 2031-08-09 US8496533B2 (en) | 2010-03-22 | 2010-03-22 | Journal bearing with dual pass cooling for air machine |
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CN (1) | CN102200165B (en) |
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US5113670A (en) * | 1990-08-03 | 1992-05-19 | United Technologies Corporation | Bearing cooling arrangement for air cycle machine |
US20070134105A1 (en) * | 2005-12-14 | 2007-06-14 | Hamilton Sundstrand | ACM cooling flow path and thrust load design |
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Cited By (7)
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US20150258491A1 (en) * | 2014-03-11 | 2015-09-17 | Trusval Technology Co., Ltd. | Generation apparatus for dissolving gas in liquid and fluid nozzle |
US9550156B2 (en) * | 2014-03-11 | 2017-01-24 | Trusval Technology Co., Ltd. | Generation apparatus for dissolving gas in liquid and fluid nozzle |
US20180066666A1 (en) * | 2016-09-02 | 2018-03-08 | Hamilton Sundstrand Corporation | Ventilation fan having air bearing system |
US10371156B2 (en) * | 2016-09-02 | 2019-08-06 | Hamilton Sundstrand Corporation | Ventilation fan having air bearing system |
US10876539B2 (en) | 2016-09-07 | 2020-12-29 | Hamilton Sunstrand Corporation | Ventilation fan having a hybrid bearing system |
US11614092B2 (en) | 2016-09-07 | 2023-03-28 | Hamilton Sundstrand Corporation | Ventilation fan having a hybrid bearing system |
US12000405B2 (en) | 2016-09-07 | 2024-06-04 | Hamilton Sundstrand Corporation | Ventilation fan having a hybrid bearing system |
Also Published As
Publication number | Publication date |
---|---|
US8496533B2 (en) | 2013-07-30 |
US20110229351A1 (en) | 2011-09-22 |
CN102200165A (en) | 2011-09-28 |
CN102200165B (en) | 2015-02-18 |
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