EP0903465B1 - Connexion entre roue de compresseur et arbre pour turbomachines à haute vitesse - Google Patents

Connexion entre roue de compresseur et arbre pour turbomachines à haute vitesse Download PDF

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Publication number
EP0903465B1
EP0903465B1 EP97810685A EP97810685A EP0903465B1 EP 0903465 B1 EP0903465 B1 EP 0903465B1 EP 97810685 A EP97810685 A EP 97810685A EP 97810685 A EP97810685 A EP 97810685A EP 0903465 B1 EP0903465 B1 EP 0903465B1
Authority
EP
European Patent Office
Prior art keywords
shaft
hub
cone
compressor impeller
designed
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.)
Expired - Lifetime
Application number
EP97810685A
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German (de)
English (en)
Other versions
EP0903465A1 (fr
Inventor
Josef Bättig
Alfred Müller
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.)
Accelleron Industries AG
Original Assignee
ABB Turbo Systems AG
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
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Application filed by ABB Turbo Systems AG filed Critical ABB Turbo Systems AG
Priority to EP97810685A priority Critical patent/EP0903465B1/fr
Priority to DE59710695T priority patent/DE59710695D1/de
Priority to KR1019980037539A priority patent/KR100538964B1/ko
Priority to US09/152,519 priority patent/US6012901A/en
Priority to CZ19982925A priority patent/CZ293545B6/cs
Priority to CNB981192955A priority patent/CN1304731C/zh
Priority to JP26681298A priority patent/JP4089802B2/ja
Publication of EP0903465A1 publication Critical patent/EP0903465A1/fr
Publication of EP0903465B1 publication Critical patent/EP0903465B1/fr
Application granted granted Critical
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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
    • 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
    • F05D2230/00—Manufacture
    • F05D2230/70—Disassembly methods

Definitions

  • the invention relates to a compressor wheel attachment for high-speed turbomachinery according to the preamble of claim 1.
  • Compressor wheels of turbomachinery are either non-positive or positive connected to their drive shaft. With increasing pressure conditions and consequently with increasing operating torques and high peripheral speeds is a positive torque transmission, i.e. a form-fitting Shaft-hub connection of the compressor wheel advantageous.
  • a positive compressor wheel attachment is known from EP 05 22 630 B1, which is realized by means of a multi-spline shaft. With this solution it is Lifespan of the shaft-hub connection due to the insertion of the keyways Notches restricted. Additional centering elements are also required, which increase the cost of the compressor wheel. As a result of the manufacturing Such a shaft-hub connection must have inaccuracies of multi-spline shafts always be balanced as a unit, the parts being identical for the purpose Reassembly must be marked accordingly. So the stake is of the compressor wheel with another, not balanced together with this Wave not possible. However, this is a crucial disadvantage when servicing.
  • Positive compressor wheel attachments using a thread are both from US 3,961,867 and from WO 93/022778.
  • the loosening torques required for disassembly reach double the Operating torque.
  • Such forces can only be achieved using special tools or be applied by means of a transmission gear.
  • fastening the compressor wheel by means of a thread in that when assembling the compressor wheel the first with the shaft thread touching areas of the hub thread up to their End position must travel a relatively long way on the shaft thread.
  • High-speed turbo machines such as for example turbochargers, reach peripheral speeds of 500 m / s and about that. Such peripheral speeds place significantly higher demands the torque transmission and the safety of the shaft-hub connection, These requirements can be met with the conventional state of the art Technology cannot be met.
  • the invention tries to avoid all of these disadvantages. You have the task based on a safe and reproducible compressor wheel attachment for high-speed To create turbo machines, which also have an improved torque transmission has.
  • both in the through hole of the compressor wheel arranged hub cone as well as the corresponding one Shaft cone each have an average diameter and these mean diameters at an axial distance from the center of mass of the compressor wheel are arranged, which is at least half the middle Corresponds to diameters.
  • the through hole of the hub is on the shaft side of the hub cone is at least partially designed as a cylindrical bore.
  • the hub and shaft cones i.e. the real ones Fastening elements, outside the center of mass of the compressor wheel. Therefore, they are essential in the fastening area of the compressor wheel to record minor stresses due to centrifugal forces or thermal expansion, so that the widening of the hub cone can be significantly reduced. This means that compressor wheel attachment can be secured even at high speeds will be realized.
  • the cylindrical bore arranged on the shaft serves as Centering seat for the compressor wheel.
  • the through bore of the hub on both sides of the hub cone is particularly advantageous at least partially formed as a cylindrical bore, the second, i.e. the cylindrical bore on the compressor side is an assembly aid.
  • the compressor wheel has one on its rear wall connecting sleeve on the shaft side for the shaft journal.
  • the hub cone in the mounting sleeve and the cylindrical bores on both sides, i.e. arranged on the shaft or compressor side of the hub cone.
  • a flat surface is advantageous on the mounting sleeve and a corresponding plan stop is formed on the shaft. So that both clear axial positioning as well as good concentricity of the compressor wheel reached.
  • the shaft journal is formed at least in two parts and consists of the shaft cone as well as one with the centering seat, i.e. with the shaft-side cylindrical Bore, corresponding shaft collar.
  • the shaft journal is formed at least in three parts. He points to that
  • a cylindrical shaft end, which pre-centering the compressor wheel serves to position it on the shaft journal.
  • each a holding device for an assembly / disassembly tool arranged.
  • the receiving device is particularly advantageous of the shaft journal in the shaft end, with a two-part shaft journal however arranged in the shaft cone.
  • the receiving devices are as internal threads formed, the internal thread of the shaft end or the shaft cone is smaller than the internal thread of the hub.
  • the assembly / disassembly tool is different as a differential screw with two external threads Incline trained. The one that corresponds to the smaller slope corresponds External thread with the internal thread of the hub and the one with the larger one Inclined external thread with the internal thread of the shaft end or the shaft cone.
  • the differential screw or its differential thread serves both as an assembly / disassembly tool as well as for axially securing the compressor wheel the wave. Accordingly, no additional assembly / disassembly tools are required.
  • the hub cone is on the compressor side the center of gravity of the compressor wheel. This will make it Compressor wheel stressed much less by centrifugal forces or thermal expansion than with the arrangement of the hub cone in the center of mass. With this, in particular suitable for the external storage of turbochargers Widening of the hub cone is reduced even further and thus the fastening of the Compressor wheel can be further improved. In addition, a smaller axial length reached.
  • the exhaust gas turbocharger mainly consists of a radial compressor Compressor 1 and an exhaust gas turbine, not shown, which on a common shaft 2 are arranged.
  • the radial compressor 1 has a compressor housing 3, in which a compressor wheel 4 is rotatably mounted on the shaft 2.
  • the compressor wheel 4 has one with a large number of rotor blades 5 Hub 6 on.
  • the hub 6 is a central, a shaft journal 7 of the shaft 2 receiving Through hole 8 introduced (Fig. 1).
  • the through hole 8 is partially designed as a hub cone 9 with a polygonal base 10 (Fig. 2).
  • the shaft journal 7 takes one corresponding to the hub cone 9 Wave cone 11, which in turn also has a polygonal Base area 12 has.
  • the hub 6 of the compressor wheel 4 is equipped on the shaft side with a rear wall 13. On the compressor side of the rear wall 13, the compressor wheel 4 has a center of mass 14.
  • the through hole 8 is on both sides of the hub cone 9 formed as a cylindrical bore 15, 16. Both holes 15, 16 are coaxial to an axis 17 of the through hole 8.
  • the solution according to the invention can also be used with an exhaust gas turbocharger can be used with a compressor 1 designed as an axial compressor (not shown).
  • the exhaust gas turbocharger has an inner bearing, i.e. between the turbine or between its likewise not shown Housing and the compressor housing 3 is a bearing housing 18 with an axial / radial bearing 19 arranged in which the shaft 2 is rotatably mounted.
  • the shaft journal 7 To the The rear wall 13 of the hub 6 closes a fastening bushing 20 on the shaft side the shaft journal 7. While the mounting sleeve 20 with a flat surface 21 closes, the shaft 2 has a corresponding plan stop 22. Either the hub cone 9 and the shaft cone 11 are in the mounting sleeve 20 arranged.
  • the axial / radial bearing 19 consists of a on the bearing housing 18 by means of screws 26 fixed and therefore fixed bearing body 27 and a non-rotatable bearing shaft 28 connected to the shaft 2. This becomes the compressor wheel 4 Axial / radial bearing 19 from an intermediate element designed as an auxiliary bearing disc 29 completed, which compressor side another stop 30 for the mounting sleeve 20 has. Between the bearing housing 18 and the Compressor housing 3, an intermediate wall 31 is arranged and by means of fastening screws 32 fixed to the bearing housing 18. The intermediate wall 31 takes the Fastening sleeve 20 of the hub 6 of the compressor wheel 4 and is opposite this is sealed, for example, by means of a labyrinth seal (not shown).
  • the shaft journal 7 is in three parts and consists of a cylindrical shaft end 33, the shaft cone 11 and a cylindrical one adjoining the shaft 2 Wave collar 34. On the side of the shaft end 33 has the wave cone 11 its smallest diameter (Fig. 1).
  • Both the shaft end 33 of the shaft journal 7 and the hub 6 are on their end on the compressor side, each with an internal thread Receiving device 35, 36 for an assembly / disassembly tool designed as a differential screw 37 of the compressor wheel 4 provided.
  • the differential screw 37 has two external threads 38, 39 different Size and different slope.
  • the larger external thread 38 has the smaller pitch and corresponds to the internal thread 36 of the hub 6, while the one with the larger pitch is smaller External thread 39 cooperates with the internal thread 35 of the shaft end 33.
  • the differential screw 37 has a hexagon socket Recording 40 for an actuator, not shown.
  • the differential screw 37 is first about a third screwed into the compressor wheel 4. Then will the compressor wheel 4 pushed over the cylindrical shaft end 33 until the differential screw 37 with its smaller external thread 39 on the internal thread 35 of the shaft end 33 abuts. Then the differential screw 37 using the Actuating element rotated until the compressor wheel 4 with its flat surface 21 is present at stop 30. At this point, the reverse thrust serving as the tread of the axial / radial bearing 19 auxiliary bearing disc 29 between the face stop 22 of the shaft 2 and the face surface 21 of the compressor wheel 4 trapped.
  • the exhaust gas turbocharger also has an internal storage.
  • the shaft journal is 7, however, only formed in two parts and consists of the shaft cone 11 and from the corresponding with the shaft-side cylindrical bore 16 Wavy collar 34 (Fig. 3).
  • an appropriately adapted assembly / disassembly tool 37 ' i.e. a extended differential screw is used.
  • the exhaust gas turbocharger has an upstream the compressor wheel 4 arranged external bearing, of which only one bearing housing 18 'are shown with a seal 41.
  • Both the hub cone 9 and the shaft cone 11 are formed on the compressor-side end of the compressor wheel 4.
  • the two cylindrical bores 15, 16 of the hub 6 are on the shaft side the hub cone 9 is arranged. They have the same diameter and go into each other at the center of gravity 14 of the compressor wheel 4.
  • the Shaft journal 7 is in three parts and consists of a cylindrical shaft end 33 ' for receiving a mounting / securing element designed as a threaded bush 37 ", the shaft cone 11 and a cylindrical one adjoining the shaft 2 Wavy collar 34 '.
  • the shaft collar 34 In contrast to the first embodiment corresponds the shaft collar 34 'therefore with both cylindrical bores 15, 16 the hub 6.
  • the hub 6 On the shaft side of the hub cone 9, the hub 6 has a flat surface 21 ' on which with a correspondingly designed plan stop 22 'of the shaft collar 34 'cooperates (Fig. 4).
  • the compressor wheel 4 is first pushed onto the shaft journal 7 and then by means of the threaded bush 37 "on the shaft cone 11 raised.
  • the threaded bush 37 On the shaft cone 11 raised.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Supercharger (AREA)

Claims (11)

  1. Connexion entre une roue de compresseur et un arbre pour des turbomachines à grande vitesse, avec une roue de compresseur (4) fixée sur un arbre (2), qui se compose d'un moyeu (6) garni de plusieurs aubes mobiles (5) et muni d'une paroi arrière (13) et qui possède un centre de gravité (14) du côté du compresseur par rapport à la paroi arrière (13), dans laquelle le moyeu (6) est pourvu d'un alésage central traversant (8) destiné à recevoir un tourillon d'arbre (7) de l'arbre (2) et l'alésage traversant (8) est configuré au moins en partie en un cône de moyeu (9) avec une base de forme polygonale (10), le tourillon d'arbre (7) présente un cône d'arbre (11) coopérant avec le cône de moyeu (9) et présentant une base (12) de forme polygonale correspondant à la base (10) du cône de moyeu (9), caractérisée en ce que
    a) aussi bien le cône de moyeu (9) que le cône d'arbre (11) présentent chacun un diamètre moyen (23, 24) et ces diamètres moyens (23, 24) sont disposés à une distance axiale (25) du centre de gravité (14) de la roue de compresseur (4) qui correspond au moins à la moitié des diamètres moyens (23, 24),
    b) le cône de moyeu (9) et le cône d'arbre (11) sont situés à l'extérieur du centre de gravité (14) de la roue de compresseur (4), et
    c) du côté de l'arbre par rapport au cône de moyeu (9), l'alésage traversant (8) du moyeu (6) est configuré au moins en partie en un alésage cylindrique (16).
  2. Connexion entre une roue de compresseur et un arbre suivant la revendication 1, caractérisée en ce que l'alésage traversant (8) du moyeu (6) est configuré, de part et d'autre du cône de moyeu (9), au moins en partie en un alésage cylindrique (15, 16).
  3. Connexion entre une roue de compresseur et un arbre suivant la revendication 2, caractérisée en ce que le moyeu (6) de la roue de compresseur (4) présente une douille de connexion (20) pour le tourillon d'arbre (7) se raccordant du côté de l'arbre à la paroi arrière (13), dans laquelle le cône de moyeu (9) est disposé dans la douille de connexion (20) et les alésages cylindriques (15, 16) sont disposés de part et d'autre du cône de moyeu (9).
  4. Connexion entre une roue de compresseur et un arbre suivant la revendication 3, caractérisée en ce que, du côté de l'arbre par rapport au moyeu (6), une face plane (21) est formée sur la douille de connexion (20) et l'arbre (2) présente une butée plane correspondante (22).
  5. Connexion entre une roue de compresseur et un arbre suivant la revendication 4, caractérisée en ce que le tourillon d'arbre (7) est formé en au moins deux parties et se compose du cône d'arbre (11) ainsi que d'une portée d'arbre (34) correspondant à l'alésage cylindrique du côté de l'arbre (16).
  6. Connexion entre une roue de compresseur et un arbre suivant la revendication 4, caractérisée en ce que le tourillon d'arbre (7) est formé en au moins trois parties et se compose du cône d'arbre (11), d'une portée d'arbre (34) correspondant à l'alésage cylindrique du côté de l'arbre (16) ainsi que d'un bout d'arbre cylindrique (33).
  7. Connexion d'une roue de compresseur et d'un arbre suivant la revendication 5 ou 6, caractérisée en ce qu'au moins un dispositif de réception (35, 36) est chaque fois disposé dans le tourillon d'arbre (7) et dans l'alésage traversant (8) pour un outil de montage/démontage (37, 37') de la roue de compresseur (4) ayant de préférence la forme d'une vis différentielle avec deux filets extérieurs (38, 39) de pas différents.
  8. Connexion entre une roue de compresseur et un arbre suivant la revendication 7, caractérisée en ce que les deux dispositifs de réception (35, 36) ont la forme de filets intérieurs, le dispositif de réception (35) du tourillon d'arbre (7) est disposé dans le bout d'arbre (33) et est plus petit que le dispositif de réception (36) disposé dans l'alésage traversant (8) du moyeu (6).
  9. Connexion entre une roue de compresseur et un arbre suivant la revendication 7, caractérisée en ce que les deux dispositifs de réception (35, 36) ont la forme de filets intérieurs, le dispositif de réception (35) du tourillon d'arbre (7) est disposé dans le cône d'arbre (11) et est plus petit que le dispositif de réception (36) disposé dans l'alésage traversant (8) du moyeu (6).
  10. Connexion entre une roue de compresseur et un arbre suivant la revendication 1, caractérisée en ce que le cône de moyeu (9) est disposé en amont du centre de gravité (14) de la roue de compresseur (4).
  11. Connexion entre une roue de compresseur et un arbre suivant la revendication 10, caractérisée en ce qu'une face plane (21') est formée sur le moyeu (6) et l'arbre (2) présente une butée plane correspondante (22'), du côté du compresseur par rapport au centre de gravité (14).
EP97810685A 1997-09-19 1997-09-19 Connexion entre roue de compresseur et arbre pour turbomachines à haute vitesse Expired - Lifetime EP0903465B1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
EP97810685A EP0903465B1 (fr) 1997-09-19 1997-09-19 Connexion entre roue de compresseur et arbre pour turbomachines à haute vitesse
DE59710695T DE59710695D1 (de) 1997-09-19 1997-09-19 Verdichterradbefestigung für schnellaufende Turbomaschinen
KR1019980037539A KR100538964B1 (ko) 1997-09-19 1998-09-11 고속터보 엔진용 압축기 임펠러 체결기구
CZ19982925A CZ293545B6 (cs) 1997-09-19 1998-09-14 Upevnění kompresorového kola pro rychloběžné turbostroje
US09/152,519 US6012901A (en) 1997-09-19 1998-09-14 Compressor impeller fastening for high speed turboengines
CNB981192955A CN1304731C (zh) 1997-09-19 1998-09-18 用于高速涡轮机的压气机叶轮固定装置
JP26681298A JP4089802B2 (ja) 1997-09-19 1998-09-21 高速回転型のターボ機械に用いられる圧縮機羽根車固定装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP97810685A EP0903465B1 (fr) 1997-09-19 1997-09-19 Connexion entre roue de compresseur et arbre pour turbomachines à haute vitesse

Publications (2)

Publication Number Publication Date
EP0903465A1 EP0903465A1 (fr) 1999-03-24
EP0903465B1 true EP0903465B1 (fr) 2003-09-03

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97810685A Expired - Lifetime EP0903465B1 (fr) 1997-09-19 1997-09-19 Connexion entre roue de compresseur et arbre pour turbomachines à haute vitesse

Country Status (7)

Country Link
US (1) US6012901A (fr)
EP (1) EP0903465B1 (fr)
JP (1) JP4089802B2 (fr)
KR (1) KR100538964B1 (fr)
CN (1) CN1304731C (fr)
CZ (1) CZ293545B6 (fr)
DE (1) DE59710695D1 (fr)

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KR100538964B1 (ko) 2006-02-28
US6012901A (en) 2000-01-11
JP4089802B2 (ja) 2008-05-28
CZ292598A3 (cs) 1999-04-14
KR19990029728A (ko) 1999-04-26
EP0903465A1 (fr) 1999-03-24
CN1304731C (zh) 2007-03-14
JPH11148492A (ja) 1999-06-02
CZ293545B6 (cs) 2004-06-16
CN1212320A (zh) 1999-03-31
DE59710695D1 (de) 2003-10-09

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