EP0138516A1 - Laufrad eines Zentrifugalkompressors und seine Montage an der Welle - Google Patents

Laufrad eines Zentrifugalkompressors und seine Montage an der Welle Download PDF

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Publication number
EP0138516A1
EP0138516A1 EP84306755A EP84306755A EP0138516A1 EP 0138516 A1 EP0138516 A1 EP 0138516A1 EP 84306755 A EP84306755 A EP 84306755A EP 84306755 A EP84306755 A EP 84306755A EP 0138516 A1 EP0138516 A1 EP 0138516A1
Authority
EP
European Patent Office
Prior art keywords
impeller
shaft
hub
boss
bearing housing
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Withdrawn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
EP84306755A
Other languages
English (en)
French (fr)
Inventor
Gene Paul Elliott
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.)
Household Manufacturing Inc
Original Assignee
Household Manufacturing 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 Household Manufacturing Inc filed Critical Household Manufacturing Inc
Publication of EP0138516A1 publication Critical patent/EP0138516A1/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
    • F01D5/02—Blade-carrying members, e.g. rotors
    • F01D5/025—Fixing blade carrying members on shafts
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/266—Rotors specially for elastic fluids mounting compressor rotors on shafts
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/284—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for compressors

Definitions

  • the present invention relates to the field of centrifugal compressors, and more particularly to an improved design including a compressor wheel or impeller which has a solid hub for the axial extent of the blades and the axis of rotation to permit increased tip speed for greater durability.
  • centrifugal compressors are used in various applications for pressurizing a fluid and delivering it through an outlet passageway.
  • a centrifugal compressor typically comprises an impeller mounted within a closely-conforming impeller chamber.
  • the chamber has an axial, inlet port or passageway for permitting the fluid to enter the chamber adjacent the center of the impeller.
  • the fluid is drawn into the chamber by rotation of the impeller and is delivered thereby through an annular, diffuser passageway into a surrounding volute, outlet passageway.
  • the rotation of the impeller imparts a velocity to the particles of the fluid.
  • the energy of the fluid represented by this velocity is converted through the medium of the diffuser passageway into a pressure within the scroll or volute passageway.
  • centrifugal compressor apparatus which can withstand a high rotational velocity for the compressor wheel, and at the same time a low size and weight for the apparatus.
  • the velocity of the tip of the compressor blades furthest from the rotational axis can be extremely high. These extreme speeds result in a substantial stress proportional to the square of the rotational speed and reaching a maximum at the center.
  • the compressor hubs have in the past been provided with a central bore within which a shaft is received for mounting the compressor wheel for rotation. This bore results in an inherent weakness of the hub which in the past has been overcome by providing a greater size to the hub to meet the strength requirements.
  • a centrifugal compressor is combined with a turbine assembly such as found in a typical turbocharger.
  • the same strength requirements are typically present.
  • the turbine wheel has in some instances been formed integral with the shaft upon which the compressor wheel is mounted.
  • An example of an integral shaft and turbine wheel is contained in United States Patent No. 2,583,430, issued to Kadenacy on January 22, 1.952. This provides the desired strength for the turbine wheel, but has an increased expense associated with it.
  • the turbine wheel for a turbocharger type device has been provided with a solid hub and a mounting boss which extends inwardly therefrom and is connected with the shaft.
  • a compressor wheel which has a solid hub for the full axial extent of the blades. Referring, for example, to United States Patent No. 3,874,824, issued to Cronstedt et al. on April 1, 1975, there is disclosed a turbine wheel having a shaft portion that is secured by internal threads onto the external threads of a shaft.
  • a centrifugal compressor apparatus which includes a bearing housing, bearing means within the housing and receiving a shaft, a compressor cover mounted to the housing and defining an impeller chamber, an impeller received within the chamber, the impeller including a hub having a solid hub for the axial extent of the blades and having a boss extending therefrom, and means for mounting the boss of the impeller to the shaft.
  • a further object of the present invention is to provide a centrifugal compressor which includes an impeller which is solid in the area of the blades to provide desired strength with a minimal size and weight.
  • FIG. I is a side, cross-sectional view of a turbocharger incorporating a centrifugal compressor designed in accordance with the present invention.
  • turbocharger assembly 10 including a compressor 11 constructed in accordance with the present invention.
  • the two main subassemblies of the turbocharger are the compressor 11 and turbine 12.
  • Bearing housing assembly 13 supports and interconnects the compressor 11 and the turbine 12.
  • Assembly 13 includes a shaft 14 rotatably supported within bearing housing 15 by sleeve bearings 16.
  • Turbine wheel 17 is connected to one end of shaft 14 and is received within turbine housing 18.
  • the turbine housing is secured to bearing housing 15 by V-clamp 19.
  • Impeller 20 is received within an impeller chamber 21 defined by the bearing housing 15 and the cover 22 secured to the housing by a clamp 23.
  • Impeller 20 includes blades 24 extending therefrom, and is mounted to shaft 14 as is further explained below.
  • Exhaust gas from the exhaust manifold of an engine to which turbocharger 10 is connected enters turbine housing 18 through turbine inlet 25 and thereafter enters volute 26.
  • the gas enters the turbine wheel 17 around its periphery and expands through exhaust outlet 27. Energy of the exhaust gas is thereby converted to mechanical work, turning wheel 17 and driving shaft 14 and compressor wheel or impeller 20.
  • the impeller 20 is used to compress air to increase the amount of air delivered to the engine cylinders above that available in natural aspiration.
  • the compressed air exits compressor 11 through a tangential outlet communicating with passageway 28 and connected to the engine intake manifold or air induction system. As a result, the engine burns more fuel and produces greater power.
  • Compressor wheel or impeller 20 is mounted upon shaft 14 and is operable to rotate therewith.
  • Impeller 20 includes blades 24.
  • Compressor cover 22 is attached to bearing housing 15 and includes a wall portion 29 defining an impeller chamber 21 which closely conforms to the profile of blades 24.
  • Cover 22 further comprises a scroll 30 defining the toroidal or volute passageway 28 which surrounds impeller chamber 21 and communicates therewith through annular diffuser passageway 31.
  • the present invention provides a compressor wheel or impeller 20 which has a solid hub for the axial extent of the blades.
  • the impeller includes a hub 32 from which the plurality of blades 24 extend outwardly, generally radially.
  • the impeller has a back end 33 adjacent the bearing housing and a front end 34 spaced from or opposite the bearing housing.
  • the hub 32 als.o includes a central axis 35 about which the impeller rotates.
  • the blades 24 extend in the direction of the front end of the impeller to a front plane 36 substantially normal to the central axis 35.
  • the blades 24 also extend in the direction of the back end of the impeller to a back plane 37 substantially normal to the central axis of the hub.
  • the hub 32 of the impeller 20 is solid in the area between the front and back planes, or in other words is solid in the area of the blades.
  • the peak stress for the rotating compressor wheel or impeller lies close to the plane of the back of the wheel, or more particularly close to the back plane of the blades.
  • the presence of a hole in the area of this plane results in a substantially decreased resistance to stress fatigue.
  • a small hole is almost as bad as a big hole in this regard.
  • the present invention is therefore desirable by providing an impeller which is fastened to a shaft and yet which is solid in this peak stress region.
  • the present invention overcomes an existing design limitation by providing an impeller which can tolerate increased tip speeds for a given size of impeller and hub as opposed to prior art devices.
  • the maximum allowable tip speed can be increased by about 15 percent without compromising the durability of the impeller in applications involving frequent shaft speed cycling. This allows higher compressor boost ratios and/or higher operational altitude limits for the turbocharger. Alternately, the allowable tip speed could be held to the currently established limit, with the expectation of at least five times the number of speed cycles prior to hub fatigue failure.
  • the impeller hub includes a boss 38 which extends outwardly at the back end of the impeller. This boss is mounted to the shaft 14.
  • the hub of the impeller is tapered, such as at 39, in the direction of the back end from the back plane 37 to the boss 38.
  • the boss may be cast integrally with the hub, or may be attached thereon such as by welding.
  • the boss is provided with an internally threaded bore 40, with the bore extending inwardly in the direction of the front end of the impeller but short of the back plane 37.
  • a bore is provided in the impeller, it is located within the boss portion 38 and therefore is spaced apart from the back plane 37 at which the maximum stress is experienced.
  • the shaft 14 includes a reduced diameter portion 41, a circumferential groove 42 at the end of the threads, and a threaded end 43 with a pilot on the end. The threaded and piloted end 43 is received within the bore 40 and centered and secured thereby. The threads will be reverse to the rotation of the wheel.
  • the front end of the impeller is provided with a wrench lug portion 44 to facilitate mounting of the impeller to the shaft as described.
  • Assembly 13 may comprise any suitable combination of bearing, lubricating and sealing elements required to rotatably support shaft 14 in the conditions of operation.
  • the specific components of bearing housing assembly 13 do not constitute a part of the present invention, and therefore will not be recited in full detail, these components and their interrelationships being known in the art.
  • the exterior of the boss 38 is provided with a circumferential groove 45 in which a sealing ring 46 is received, which seals with the plate 54 secured within the bearing housing.
  • a thrust ring 47 is received against a shoulder 48 at the location of the reduced diameter portion 41 of the shaft.
  • a spacer 49 is received against the first thrust ring 47, and a second thrust ring 50 is received against the spacer.
  • the hub is received upon the threaded end of the shaft and tightened thereon with the back end of the boss 38 securing the thrust rings 47 and 50 and spacer 49 against the shoulder 48 of the shaft.
  • a thrust bearing 51 is positioned between the thrust rings 47 and 50 and includes oil passageways, such as 52, to provide lubrication at the thrust surfaces.
  • An oil deflector 53 is also provided.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Supercharger (AREA)
EP84306755A 1983-10-07 1984-10-04 Laufrad eines Zentrifugalkompressors und seine Montage an der Welle Withdrawn EP0138516A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US54012283A 1983-10-07 1983-10-07
US540122 1995-10-06

Publications (1)

Publication Number Publication Date
EP0138516A1 true EP0138516A1 (de) 1985-04-24

Family

ID=24154097

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84306755A Withdrawn EP0138516A1 (de) 1983-10-07 1984-10-04 Laufrad eines Zentrifugalkompressors und seine Montage an der Welle

Country Status (3)

Country Link
EP (1) EP0138516A1 (de)
JP (1) JPS6098197A (de)
BR (1) BR8405056A (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2177161A (en) * 1985-05-30 1987-01-14 Teledyne Ind Turbocharger housing
US4747759A (en) * 1985-05-30 1988-05-31 Teledyne Industries, Inc. Turbocharger housing
WO1991006749A1 (en) * 1989-10-30 1991-05-16 Allied-Signal Inc. Turbocharger compressor wheel assembly with boreless hub compressor wheel
WO2004015273A1 (en) * 2002-07-30 2004-02-19 Honeywell International Inc. Compressor impeller
EP1312769B1 (de) * 1997-08-06 2004-07-14 Honeywell International Inc. Abgasturbolader
US7040867B2 (en) 2003-11-25 2006-05-09 Honeywell International, Inc. Compressor wheel joint
CN101542088A (zh) * 2006-12-11 2009-09-23 博格华纳公司 涡轮增压器
CN102828993A (zh) * 2011-06-15 2012-12-19 霍尼韦尔国际公司 叶轮和可更换的突鼻件
CN113557362A (zh) * 2019-03-14 2021-10-26 三菱重工发动机和增压器株式会社 压缩机叶轮装置以及增压器

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4944660A (en) * 1987-09-14 1990-07-31 Allied-Signal Inc. Embedded nut compressor wheel
JP5141262B2 (ja) * 2008-01-23 2013-02-13 株式会社Ｉｈｉ 過給機

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB655880A (en) * 1945-12-14 1951-08-08 British Thomson Houston Co Ltd Improvements in and relating to high speed rotors
US3961867A (en) * 1973-04-06 1976-06-08 Holset Engineering Company Limited Rotatable assembly with rotor abraded by seal ring
US4340317A (en) * 1981-05-07 1982-07-20 Northern Research & Engineering Corp. Splineless coupling means
EP0129311A1 (de) * 1983-04-21 1984-12-27 The Garrett Corporation Aufbau eines Verdichterlaufrades

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB655880A (en) * 1945-12-14 1951-08-08 British Thomson Houston Co Ltd Improvements in and relating to high speed rotors
US3961867A (en) * 1973-04-06 1976-06-08 Holset Engineering Company Limited Rotatable assembly with rotor abraded by seal ring
US4340317A (en) * 1981-05-07 1982-07-20 Northern Research & Engineering Corp. Splineless coupling means
EP0129311A1 (de) * 1983-04-21 1984-12-27 The Garrett Corporation Aufbau eines Verdichterlaufrades

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4747759A (en) * 1985-05-30 1988-05-31 Teledyne Industries, Inc. Turbocharger housing
GB2177161B (en) * 1985-05-30 1989-07-12 Teledyne Ind Turbocharger housing
GB2177161A (en) * 1985-05-30 1987-01-14 Teledyne Ind Turbocharger housing
WO1991006749A1 (en) * 1989-10-30 1991-05-16 Allied-Signal Inc. Turbocharger compressor wheel assembly with boreless hub compressor wheel
EP1312769B1 (de) * 1997-08-06 2004-07-14 Honeywell International Inc. Abgasturbolader
CN100400889C (zh) * 2002-07-30 2008-07-09 霍尼韦尔国际公司 内燃机的涡轮增压器和其中使用的压缩机叶轮
WO2004015273A1 (en) * 2002-07-30 2004-02-19 Honeywell International Inc. Compressor impeller
US7040867B2 (en) 2003-11-25 2006-05-09 Honeywell International, Inc. Compressor wheel joint
CN101542088A (zh) * 2006-12-11 2009-09-23 博格华纳公司 涡轮增压器
CN102828993A (zh) * 2011-06-15 2012-12-19 霍尼韦尔国际公司 叶轮和可更换的突鼻件
EP2535592A3 (de) * 2011-06-15 2013-05-15 Honeywell International Inc. Rad und austauschbares Nasenstück
US8801379B2 (en) 2011-06-15 2014-08-12 Honeywell International Inc. Wheel and replaceable nose piece
CN113557362A (zh) * 2019-03-14 2021-10-26 三菱重工发动机和增压器株式会社 压缩机叶轮装置以及增压器
CN113557362B (zh) * 2019-03-14 2023-09-05 三菱重工发动机和增压器株式会社 压缩机叶轮装置以及增压器

Also Published As

Publication number Publication date
JPS6098197A (ja) 1985-06-01
BR8405056A (pt) 1985-08-20

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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AK Designated contracting states

Designated state(s): DE FR GB SE

RTI1 Title (correction)
STAA Information on the status of an ep patent application or granted ep patent

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18D Application deemed to be withdrawn

Effective date: 19851230

RIN1 Information on inventor provided before grant (corrected)

Inventor name: ELLIOTT, GENE PAUL