EP1922489A1 - Turbocharger with bearing housing having an aerodynamically enhanced compressor wheel pocket geometry - Google Patents

Turbocharger with bearing housing having an aerodynamically enhanced compressor wheel pocket geometry

Info

Publication number
EP1922489A1
EP1922489A1 EP06813929A EP06813929A EP1922489A1 EP 1922489 A1 EP1922489 A1 EP 1922489A1 EP 06813929 A EP06813929 A EP 06813929A EP 06813929 A EP06813929 A EP 06813929A EP 1922489 A1 EP1922489 A1 EP 1922489A1
Authority
EP
European Patent Office
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.)
Withdrawn
Application number
EP06813929A
Other languages
German (de)
English (en)
French (fr)
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
Publication of EP1922489A1 publication Critical patent/EP1922489A1/en
Withdrawn legal-status Critical Current

Links

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 turbine 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.
  • the intermediate housing also includes a set of bearings which are used to support the shaft.
  • the turbine wheel and compressor wheel are both mounted on the shaft, which rotates in the bearings.
  • the bearings are lubricated, and the intermediate housing also has a labyrinth seal which is used to prevent oil from leaking into the compressor housing.
  • the pressure imbalance results in a lack of pressure against the labyrinth seal and the oil it retains, which can lead to oil leaking 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 recess 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.
  • Figure 1 is a sectional plan view of a turbocharger unit having an aerodynamically enhanced pocket, according to a first embodiment of the present invention
  • Figure 2 is an enlarged sectional plan view of an intermediate housing, partially broken away, having an aerodynamically enhanced pocket according to a first embodiment of the present invention
  • Figure 3 is a greatly enlarged sectional plan view of an intermediate housing having an aerodynamically enhanced pocket according to a first embodiment of the present invention.
  • Figure 4 is an enlarged sectional plan 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.
  • In between and connected to the turbine housing 24 and the compressor housing 16 is an intermediate housing 28.
  • Located inside the intermediate housing 28 is a set of bearings 30 and a thrust bearing 32.
  • the bearings 30 and thrust bearing 32 receive oil from a series of fluid passages 33.
  • the series of fluid passages 33 are made up of an oil feed passage 34, a main oil passageway 36, a first angled passageway 38 and a second angled passageway 40.
  • 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 a seal, shown in Figure 1 as a labyrinth seal 42, and an oil shield 44.
  • 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.
  • a sharp edge 48 is shown in the Figures as part of a compressor wheel pocket 50 located in the intermediate housing 28.
  • the compressor wheel pocket 50 is shown as an aerodynamically enhanced pocket 52 having a spoon-shaped recess 54.
  • the spoon-shaped recess 54 includes the sharp edge 48 in the intermediate housing 28, and recesses in a round, spoon-shaped manner to form a rounded recess 56.
  • the spoon- shaped recess 54 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 54 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. 4 A second embodiment of the present invention is shown in Figure 4.
  • the aerodynamically enhanced pocket 52 in the intermediate housing 28 is in the form of a knife-shaped recess 58 defined by the same sharp edge 48 as the spoon-shaped recess 54 of the intermediate housing 28, but then recesses into the housing to form an angled recess 60, set at an angle 62.
  • the knife-shaped recess 58 shown in Figure 4 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 58 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 54 and knife- shaped recess 58 define the sharp edge 48 in the intermediate housing 28.
  • the diameter of the sharp edge 48 is the same in both embodiments described herein.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)
EP06813929A 2005-09-09 2006-08-29 Turbocharger with bearing housing having an aerodynamically enhanced compressor wheel pocket geometry Withdrawn EP1922489A1 (en)

Applications Claiming Priority (3)

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
PCT/US2006/033783 WO2007032906A1 (en) 2005-09-09 2006-08-29 Turbocharger with bearing housing having an aerodynamically enhanced compressor wheel pocket geometry

Publications (1)

Publication Number Publication Date
EP1922489A1 true EP1922489A1 (en) 2008-05-21

Family

ID=37635765

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06813929A Withdrawn EP1922489A1 (en) 2005-09-09 2006-08-29 Turbocharger with bearing housing having an aerodynamically enhanced compressor wheel pocket geometry

Country Status (5)

Country Link
US (1) US20070059188A1 (ko)
EP (1) EP1922489A1 (ko)
JP (1) JP2009508043A (ko)
KR (1) KR20080042069A (ko)
WO (1) WO2007032906A1 (ko)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104364496B (zh) * 2012-07-10 2016-12-14 博格华纳公司 排气涡轮增压器
WO2015167842A1 (en) * 2014-04-29 2015-11-05 Borgwarner Inc. Bearing housing body assembly of an exhaust-gas turbocharger
CN107614849B (zh) * 2015-07-22 2019-12-24 株式会社Ihi 油封构造及增压器
US9850857B2 (en) 2015-08-17 2017-12-26 Electro-Motive Diesel, Inc. Turbocharger blisk/shaft joint with heat isolation
US10927759B2 (en) 2016-05-20 2021-02-23 Ihi Corporation Bearing structure for turbocharger and turbocharger
EP3557081A1 (fr) * 2018-04-20 2019-10-23 Belenos Clean Power Holding AG Pile à combustible comprenant un compresseur de fluide
CN111120364A (zh) * 2019-12-27 2020-05-08 湖南泛航智能装备有限公司 一种高速离心式压缩机

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Publication number Priority date Publication date Assignee Title
US1488931A (en) * 1921-10-26 1924-04-01 Marechal Paul Joseph Charles Turbo engine
US4705463A (en) * 1983-04-21 1987-11-10 The Garrett Corporation Compressor wheel assembly for turbochargers
US5076765A (en) * 1988-08-03 1991-12-31 Nissan Motor Company, Altd. Shaft seal arrangement of turbocharger
US5094587A (en) * 1990-07-25 1992-03-10 Woollenweber William E Turbine for internal combustion engine turbochargers
US5308169A (en) * 1992-11-20 1994-05-03 Cummins Engine Company, Inc. Bearing system for turbocharger
US5890881A (en) * 1996-11-27 1999-04-06 Alliedsignal Inc. Pressure balanced turbocharger rotating seal
US5857332A (en) * 1996-12-20 1999-01-12 Turbodyne Systems, Inc. Bearing systems for motor-assisted turbochargers for internal combustion engines
US6324848B1 (en) * 2000-09-21 2001-12-04 Caterpillar Inc. Turbocharger system to inhibit surge in a multi-stage compressor
DE10048105A1 (de) * 2000-09-28 2002-04-11 Daimler Chrysler Ag Angasturbolader für eine Brennkraftmaschine mit variabler Turbinengeometrie
US6499884B1 (en) * 2000-09-29 2002-12-31 General Motors Corporation Bearing/seal member/assembly and mounting
US6442936B1 (en) * 2000-12-14 2002-09-03 Caterpillar Inc. Single stage or multi-stage compressor for a turbocharger
US6418722B1 (en) * 2001-04-19 2002-07-16 Honeywell International, Inc. Turbocharger bearing system
GB0218092D0 (en) * 2002-08-03 2002-09-11 Holset Engineering Co Turbocharger
GB0224726D0 (en) * 2002-10-24 2002-12-04 Holset Engineering Co Compressor wheel assembly
US7252474B2 (en) * 2003-09-12 2007-08-07 Mes International, Inc. Sealing arrangement in a compressor

Non-Patent Citations (1)

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Title
See references of WO2007032906A1 *

Also Published As

Publication number Publication date
JP2009508043A (ja) 2009-02-26
WO2007032906A1 (en) 2007-03-22
US20070059188A1 (en) 2007-03-15
KR20080042069A (ko) 2008-05-14

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