US20070059188A1 - Aerodynamically enhanced bearing housing pocket geometry - Google Patents

Aerodynamically enhanced bearing housing pocket geometry Download PDF

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Publication number
US20070059188A1
US20070059188A1 US11/242,344 US24234405A US2007059188A1 US 20070059188 A1 US20070059188 A1 US 20070059188A1 US 24234405 A US24234405 A US 24234405A US 2007059188 A1 US2007059188 A1 US 2007059188A1
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US
United States
Prior art keywords
compressor
housing
pocket
compressor wheel
turbine
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
Application number
US11/242,344
Inventor
Brock Fraser
Adam Reinke
Neal Narron
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BorgWarner Inc
Original Assignee
BorgWarner Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by BorgWarner Inc filed Critical BorgWarner Inc
Priority to US11/242,344 priority Critical patent/US20070059188A1/en
Assigned to BORGWARNER INC. reassignment BORGWARNER INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: FRASER, BROCK, NARRON, NEAL, REINKE, ADAM
Priority to KR1020087001615A priority patent/KR20080042069A/en
Priority to JP2008530094A priority patent/JP2009508043A/en
Priority to PCT/US2006/033783 priority patent/WO2007032906A1/en
Priority to EP06813929A priority patent/EP1922489A1/en
Publication of US20070059188A1 publication Critical patent/US20070059188A1/en
Abandoned legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
    • F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas- turbine plants for special use
    • F02C6/04—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output
    • F02C6/10—Gas-turbine plants providing heated or pressurised working fluid for other apparatus, e.g. without mechanical power output supplying working fluid to a user, e.g. a chemical process, which returns working fluid to a turbine of the plant
    • F02C6/12—Turbochargers, i.e. plants for augmenting mechanical power output of internal-combustion piston engines by increase of charge pressure
    • 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
    • F04D29/08—Sealings
    • 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
    • F01D25/18—Lubricating arrangements
    • 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
    • F01D25/18—Lubricating arrangements
    • F01D25/183—Sealing means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D19/00—Axial-flow pumps
    • F04D19/02—Multi-stage pumps
    • F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/04—Units comprising pumps and their driving means the pump being fluid-driven
    • 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
    • F04D29/06—Lubrication
    • F04D29/063—Lubrication specially adapted for elastic fluid pumps
    • 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
    • F04D29/08—Sealings
    • F04D29/083—Sealings especially adapted for elastic fluid pumps
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • 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
    • 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
    • F05D2240/00—Components
    • F05D2240/55—Seals
    • 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
    • F05D2250/00—Geometry
    • F05D2250/30—Arrangement of components
    • F05D2250/31—Arrangement of components according to the direction of their main axis or their axis of rotation
    • F05D2250/314—Arrangement of components according to the direction of their main axis or their axis of rotation the axes being inclined in relation to each other
    • 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
    • F05D2250/00—Geometry
    • F05D2250/70—Shape
    • 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
    • F05D2250/00—Geometry
    • F05D2250/70—Shape
    • F05D2250/71—Shape curved

Definitions

  • the present invention relates to turbochargers and the prevention of oil leakage due to insufficient pressure balance across the compressor oil seal.
  • Turbochargers are a commonly used apparatus for increasing power density in engines.
  • Turbochargers are comprised of a turbine and a compressor.
  • the turbine has a housing and a turbine wheel; the compressor has a compressor housing and a compressor wheel.
  • the compressor wheel and turbine wheel are both mounted on a common shaft.
  • Located between the turbine housing and the compressor housing is an intermediate housing, which both the turbine housing and the compressor housing are connected to.
  • the intermediate housing has a compressor wheel pocket; the compressor wheel resides partially in the compressor wheel pocket, and partially in the compressor housing.
  • the turbine wheel rotates from the flow of exhaust gas from the engine through the exhaust manifold and into the turbine housing.
  • the compressor wheel spins as well.
  • fresh air is compressed and forced into the engine's intake manifold.
  • the compressor wheel is spinning at a high rotational speed, but the boost pressure is low. This can occur when the vehicle engine is running at high idle speed and can cause a pressure imbalance to occur on the side of the compressor wheel where the intermediate housing is located. This pressure imbalance occurs in the area between the compressor wheel and the intermediate housing.
  • the pressure imbalance is a lack of pressure against the labyrinth seal and the oil it retains, which can to leak into the compressor wheel pocket and into the compressor housing. Oil leaking onto the compressor wheel and compressor housing can cause fouling and problems with the air intake components leading to the engine.
  • the present invention is directed to the prevention of a pressure imbalance between the compressor wheel and the intermediate housing.
  • the present invention is a turbocharger unit having an aerodynamically enhanced pocket, comprising a turbine having a turbine housing and a turbine wheel connected to a shaft along with a compressor having a compressor housing and a compressor wheel mounted on the same shaft.
  • a seal is used for the prevention of oil from entering the compressor wheel pocket.
  • the compressor wheel pocket has an aerodynamically enhanced pocket for the improvement of pressure balance behind the compressor wheel, preventing the oil in the intermediate housing from entering the compressor housing.
  • the aerodynamically enhanced pocket is a spoon edge comprised of a rounded indentation under a sharp edge at the end of said compressor wheel pocket.
  • the aerodynamically enhanced pocket is a knife edge comprised of an acute angle at the edge of said compressor wheel pocket.
  • FIG. 1 is a sectional side view of a conventional turbocharger unit
  • FIG. 2 is an enlarged sectional side view of an intermediate housing used in a conventional turbocharger unit
  • FIG. 3 is an enlarged sectional side view of an intermediate housing, partially broken away, having an aerodynamically enhanced pocket according to a first embodiment of the present invention
  • FIG. 4 is a greatly enlarged sectional side view of an intermediate housing having an aerodynamically enhanced pocket according to a first embodiment of the present invention.
  • FIG. 5 is an enlarged sectional side view of an intermediate housing, partially broken away, having an aerodynamically enhanced pocket according to a second embodiment of the present invention.
  • the turbocharger unit 10 is comprised of a compressor 12 and a turbine 14 .
  • the compressor 12 is comprised of a compressor housing 16 , and a compressor wheel 18 held onto a shaft 20 by a retaining nut 22 .
  • Turbine 14 is comprised of a turbine housing 24 and a turbine wheel 26 welded onto shaft 22 .
  • intermediate housing 28 In between and connected to the turbine housing 24 and the compressor housing 16 is intermediate housing 28 .
  • Located inside the intermediate housing is a set of bearings 30 and a thrust bearing 32 .
  • the bearings 30 and thrust bearing 32 receive oil from an oil feed passage 34 .
  • the oil feed passage 34 feeds oil into a main oil passageway 36 ; the main oil passageway 36 delivers oil directly to the thrust bearing 32 , and to a first angled passageway 38 as well as a second angled passageway 40 .
  • the first angled passageway 38 and the second angled passageway 40 deliver oil to bearings 30 . Oil is prevented from coming in contact with the compressor wheel 18 through the use of labyrinth seal 42 .
  • the exhaust gas from the vehicle engine flows through the turbine 14 , and spins the turbine wheel 26 at a high rotational speed. Spinning the turbine wheel 26 at high rotational speed causes the shaft 20 and the compressor wheel 18 to spin at the same speed as the turbine wheel 26 .
  • the compressor wheel 18 compresses air in the compressor housing 16 , and forces the compressed air into the intake manifold of the engine (not shown).
  • the bearings 30 are lubricated through oil flowing through the first angled passageway 38 and the second angled passageway 40 .
  • the standard recess 46 is shown formed as part of the intermediate housing 28 .
  • the standard recess 46 defines a sharp edge of the intermediate housing 28 , which then recesses straight into the intermediate housing 28 .
  • the shape of the standard recess 46 allows the compressor wheel 18 to extend partially into the intermediate housing 28 .
  • the shape of the recess 46 creates an adverse air pressure balance, which in turn creates a lack of pressure against the labyrinth oil seal 42 which can cause oil to leak into the compressor housing 16 .
  • a first embodiment of the present invention is shown as a spoon-shaped recess 48 .
  • the spoon-shaped recess 48 defines the same sharp edge in the intermediate housing 28 as the standard recess 46 , but recesses in a round, spoon-shaped manner.
  • the spoon-shaped recess 48 reduces the pressure imbalance caused by the compressor wheel 18 when the turbocharger 10 is running at high oil flow conditions, for example, high engine speed, low engine load operating conditions.
  • the spoon-shaped recess 48 may be comprised of various radii to compensate for various ranges of pressure imbalance due the size of the intermediate housing 28 , the size of the compressor wheel 18 , and the volume of air flow through the compressor 12 .
  • FIG. 5 A second embodiment of the present invention is shown in FIG. 5 .
  • the intermediate housing 28 has a knife-shaped recess 50 defined by the same sharp edge as the standard recess 46 of the intermediate housing 28 , but then recesses into the housing to form an angle.
  • the knife-shaped recess 50 shown in FIG. 5 reduces the pressure imbalance caused by the compressor wheel 18 when the turbocharger 10 is running at high oil flow conditions, for example, high engine speed, low engine load operating conditions.
  • the knife-shaped recess 50 may be comprised of various angles to compensate for various ranges of pressure imbalance due the size of the intermediate housing 28 , the size of the compressor wheel 18 , and the volume of air flow through the compressor 12 .
  • both the spoon-shaped recess 48 and knife-shaped recess 50 define a sharp edge in the intermediate housing 28 which is the same diameter as the sharp edge defined by the standard recess 46 .

Abstract

A turbocharger unit having an aerodynamically enhanced pocket, comprising a turbine having a turbine housing and a turbine wheel connected to a shaft along with a compressor having a compressor housing and a compressor wheel mounted on the same shaft. There is an intermediate housing disposed between the turbine housing and the compressor housing, circumscribing the shaft, and having a compressor wheel pocket. There is a series of bearings located in the intermediate housing for supporting the shaft. There is also a series of fluid passages located in the intermediate housing which provide fluid to lubricate the bearings. A seal is used for the prevention of oil from entering the compressor wheel pocket. The compressor wheel pocket has an aerodynamically enhanced pocket for the improvement of pressure balance behind the compressor wheel, preventing the oil in the intermediate housing from entering the compressor housing.

Description

    FIELD OF THE INVENTION
  • The present invention relates to turbochargers and the prevention of oil leakage due to insufficient pressure balance across the compressor oil seal.
    • BACKGROUND OF THE INVENTION
  • Turbochargers are a commonly used apparatus for increasing power density in engines. Turbochargers are comprised of a turbine and a compressor. The turbine has a housing and a turbine wheel; the compressor has a compressor housing and a compressor wheel. The compressor wheel and turbine wheel are both mounted on a common shaft. Located between the turbine housing and the compressor housing is an intermediate housing, which both the turbine housing and the compressor housing are connected to. The intermediate housing has a compressor wheel pocket; the compressor wheel resides partially in the compressor wheel pocket, and partially in the compressor housing.
  • The turbine wheel rotates from the flow of exhaust gas from the engine through the exhaust manifold and into the turbine housing. As the turbine wheel spins, the compressor wheel spins as well. As the compressor wheel spins, fresh air is compressed and forced into the engine's intake manifold. As air flows through the compressor housing, under certain operating conditions, the compressor wheel is spinning at a high rotational speed, but the boost pressure is low. This can occur when the vehicle engine is running at high idle speed and can cause a pressure imbalance to occur on the side of the compressor wheel where the intermediate housing is located. This pressure imbalance occurs in the area between the compressor wheel and the intermediate housing.
  • The pressure imbalance is a lack of pressure against the labyrinth seal and the oil it retains, which can to leak into the compressor wheel pocket and into the compressor housing. Oil leaking onto the compressor wheel and compressor housing can cause fouling and problems with the air intake components leading to the engine.
    • SUMMARY OF THE INVENTION
  • Accordingly, the present invention is directed to the prevention of a pressure imbalance between the compressor wheel and the intermediate housing. The present invention is a turbocharger unit having an aerodynamically enhanced pocket, comprising a turbine having a turbine housing and a turbine wheel connected to a shaft along with a compressor having a compressor housing and a compressor wheel mounted on the same shaft. There is an intermediate housing disposed between the turbine housing and the compressor housing, circumscribing the shaft, and having a compressor wheel pocket. There is a series of bearings located in the intermediate housing for supporting the shaft. There is also a series of fluid passages located in the intermediate housing which provide fluid to lubricate the bearings. A seal is used for the prevention of oil from entering the compressor wheel pocket. The compressor wheel pocket has an aerodynamically enhanced pocket for the improvement of pressure balance behind the compressor wheel, preventing the oil in the intermediate housing from entering the compressor housing.
  • In a first embodiment, the aerodynamically enhanced pocket is a spoon edge comprised of a rounded indentation under a sharp edge at the end of said compressor wheel pocket.
  • In a second embodiment, the aerodynamically enhanced pocket is a knife edge comprised of an acute angle at the edge of said compressor wheel pocket.
  • Further areas of applicability of the present invention will become apparent from the detailed description provided hereinafter. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • The present invention will become more fully understood from the detailed description and the accompanying drawings, wherein:
  • FIG. 1 is a sectional side view of a conventional turbocharger unit;
  • FIG. 2 is an enlarged sectional side view of an intermediate housing used in a conventional turbocharger unit;
  • FIG. 3 is an enlarged sectional side view of an intermediate housing, partially broken away, having an aerodynamically enhanced pocket according to a first embodiment of the present invention;
  • FIG. 4 is a greatly enlarged sectional side view of an intermediate housing having an aerodynamically enhanced pocket according to a first embodiment of the present invention; and
  • FIG. 5 is an enlarged sectional side view of an intermediate housing, partially broken away, having an aerodynamically enhanced pocket according to a second embodiment of the present invention.
    • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
  • The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses.
  • Referring to FIGS. 1 and 2, a turbocharger unit is generally shown at 10. The turbocharger unit 10 is comprised of a compressor 12 and a turbine 14. The compressor 12 is comprised of a compressor housing 16, and a compressor wheel 18 held onto a shaft 20 by a retaining nut 22. Turbine 14 is comprised of a turbine housing 24 and a turbine wheel 26 welded onto shaft 22. In between and connected to the turbine housing 24 and the compressor housing 16 is intermediate housing 28. Located inside the intermediate housing is a set of bearings 30 and a thrust bearing 32. The bearings 30 and thrust bearing 32 receive oil from an oil feed passage 34. The oil feed passage 34 feeds oil into a main oil passageway 36; the main oil passageway 36 delivers oil directly to the thrust bearing 32, and to a first angled passageway 38 as well as a second angled passageway 40. The first angled passageway 38 and the second angled passageway 40 deliver oil to bearings 30. Oil is prevented from coming in contact with the compressor wheel 18 through the use of labyrinth seal 42.
  • The various embodiments of the present invention will now be described. During normal operation, the exhaust gas from the vehicle engine flows through the turbine 14, and spins the turbine wheel 26 at a high rotational speed. Spinning the turbine wheel 26 at high rotational speed causes the shaft 20 and the compressor wheel 18 to spin at the same speed as the turbine wheel 26. The compressor wheel 18 compresses air in the compressor housing 16, and forces the compressed air into the intake manifold of the engine (not shown). The bearings 30 are lubricated through oil flowing through the first angled passageway 38 and the second angled passageway 40. In FIG. 2, the standard recess 46 is shown formed as part of the intermediate housing 28. The standard recess 46 defines a sharp edge of the intermediate housing 28, which then recesses straight into the intermediate housing 28. The shape of the standard recess 46 allows the compressor wheel 18 to extend partially into the intermediate housing 28. During conditions of low boost and high air flow through the compressor housing 16 (such as high idle speed, no load), the shape of the recess 46 creates an adverse air pressure balance, which in turn creates a lack of pressure against the labyrinth oil seal 42 which can cause oil to leak into the compressor housing 16.
  • Referring now to FIGS. 3 and 4, a first embodiment of the present invention is shown as a spoon-shaped recess 48. The spoon-shaped recess 48 defines the same sharp edge in the intermediate housing 28 as the standard recess 46, but recesses in a round, spoon-shaped manner. The spoon-shaped recess 48 reduces the pressure imbalance caused by the compressor wheel 18 when the turbocharger 10 is running at high oil flow conditions, for example, high engine speed, low engine load operating conditions. The spoon-shaped recess 48 may be comprised of various radii to compensate for various ranges of pressure imbalance due the size of the intermediate housing 28, the size of the compressor wheel 18, and the volume of air flow through the compressor 12.
  • A second embodiment of the present invention is shown in FIG. 5. The intermediate housing 28 has a knife-shaped recess 50 defined by the same sharp edge as the standard recess 46 of the intermediate housing 28, but then recesses into the housing to form an angle. The knife-shaped recess 50 shown in FIG. 5 reduces the pressure imbalance caused by the compressor wheel 18 when the turbocharger 10 is running at high oil flow conditions, for example, high engine speed, low engine load operating conditions. The knife-shaped recess 50 may be comprised of various angles to compensate for various ranges of pressure imbalance due the size of the intermediate housing 28, the size of the compressor wheel 18, and the volume of air flow through the compressor 12.
  • It should be noted that both the spoon-shaped recess 48 and knife-shaped recess 50 define a sharp edge in the intermediate housing 28 which is the same diameter as the sharp edge defined by the standard recess 46.
  • Reducing the adverse pressure balance between the intermediate housing 28 and the compressor wheel 18 increases the capability of the labyrinth seal 42 to retain oil within the intermediate housing 28 by eliminating any suction force created by compressor wheel 18 spinning at a high rotational speed, while the turbocharger 10 is not under load.
  • The description of the invention is merely exemplary in nature and, thus, variations that do not depart from the gist of the invention are intended to be within the scope of the invention. Such variations are not to be regarded as a departure from the spirit and scope of the invention.

Claims (5)

1. A turbocharger unit having an aerodynamically enhanced pocket, comprising:
a turbine having a turbine housing and a turbine wheel connected to a shaft;
a compressor having a compressor housing and a compressor wheel mounted on said shaft;
an intermediate housing disposed between said turbine housing and said compressor housing, circumscribing said shaft, having a compressor wheel pocket, said compressor wheel extending at least partially into said compressor wheel pocket;
one or more bearings located in said intermediate housing, for supporting said shaft;
a series of fluid passages located in said intermediate housing for allowing oil to lubricate said bearings;
a seal for the prevention of said oil from entering said compressor housing; and
wherein said compressor wheel pocket has an aerodynamically enhanced pocket for the prevention of air pressure imbalance around said compressor wheel, and preventing said oil from entering said compressor housing.
2. The turbocharger unit of claim 1, wherein said aerodynamically enhanced pocket is a spoon-shaped recess.
3. The turbocharger unit of claim 2, wherein said spoon-shaped recess is comprised of a sharp edge and a rounded recess at the end of said compressor wheel pocket.
4. The turbocharger unit of claim 1, wherein said aerodynamically enhanced pocket is a knife-shaped recess.
5. The turbocharger unit of claim 4, wherein said knife-shaped recess is comprised of a sharp edge having an angled recess at the edge of said compressor wheel pocket.
US11/242,344 2005-09-09 2005-10-03 Aerodynamically enhanced bearing housing pocket geometry Abandoned US20070059188A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US11/242,344 US20070059188A1 (en) 2005-09-09 2005-10-03 Aerodynamically enhanced bearing housing pocket geometry
KR1020087001615A KR20080042069A (en) 2005-09-09 2006-08-29 Turbocharger with bearing housing having an aerodynamically enhanced compressor wheel pocket geometry
JP2008530094A JP2009508043A (en) 2005-09-09 2006-08-29 Turbocharger with bearing housing having aerodynamically improved compressor wheel pocket configuration
PCT/US2006/033783 WO2007032906A1 (en) 2005-09-09 2006-08-29 Turbocharger with bearing housing having an aerodynamically enhanced compressor wheel pocket geometry
EP06813929A EP1922489A1 (en) 2005-09-09 2006-08-29 Turbocharger with bearing housing having an aerodynamically enhanced compressor wheel pocket geometry

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US71601605P 2005-09-09 2005-09-09
US11/242,344 US20070059188A1 (en) 2005-09-09 2005-10-03 Aerodynamically enhanced bearing housing pocket geometry

Publications (1)

Publication Number Publication Date
US20070059188A1 true US20070059188A1 (en) 2007-03-15

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US11/242,344 Abandoned US20070059188A1 (en) 2005-09-09 2005-10-03 Aerodynamically enhanced bearing housing pocket geometry

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US (1) US20070059188A1 (en)
EP (1) EP1922489A1 (en)
JP (1) JP2009508043A (en)
KR (1) KR20080042069A (en)
WO (1) WO2007032906A1 (en)

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WO2015167842A1 (en) * 2014-04-29 2015-11-05 Borgwarner Inc. Bearing housing body assembly of an exhaust-gas turbocharger
US9850857B2 (en) 2015-08-17 2017-12-26 Electro-Motive Diesel, Inc. Turbocharger blisk/shaft joint with heat isolation
US10400824B2 (en) * 2015-07-22 2019-09-03 Ihi Corporation Oil seal structure and turbocharger
CN111120364A (en) * 2019-12-27 2020-05-08 湖南泛航智能装备有限公司 High-speed centrifugal compressor
US10927759B2 (en) 2016-05-20 2021-02-23 Ihi Corporation Bearing structure for turbocharger and turbocharger
US11686325B2 (en) * 2018-04-20 2023-06-27 Belenos Clean Power Holding Ag Fuel cell comprising a fluid compressor

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IN2015DN00470A (en) * 2012-07-10 2015-06-26 Borgwarner Inc

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KR20080042069A (en) 2008-05-14
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WO2007032906A1 (en) 2007-03-22

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