EP0893576B1 - Verbindung von rotierenden Bauteilen - Google Patents
Verbindung von rotierenden Bauteilen Download PDFInfo
- Publication number
- EP0893576B1 EP0893576B1 EP98810441A EP98810441A EP0893576B1 EP 0893576 B1 EP0893576 B1 EP 0893576B1 EP 98810441 A EP98810441 A EP 98810441A EP 98810441 A EP98810441 A EP 98810441A EP 0893576 B1 EP0893576 B1 EP 0893576B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- centring
- offset
- rotor
- insert ring
- positive
- 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
Links
- 239000000463 material Substances 0.000 claims description 12
- 238000006073 displacement reaction Methods 0.000 description 7
- 230000035882 stress Effects 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
Images
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
- 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
- F01D5/026—Shaft to shaft connections
-
- 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
- F01D5/06—Rotors for more than one axial stage, e.g. of drum or multiple disc type; Details thereof, e.g. shafts, shaft connections
- F01D5/066—Connecting means for joining rotor-discs or rotor-elements together, e.g. by a central bolt, by clamps
-
- 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
- F05D2230/60—Assembly methods
- F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
- F05D2230/642—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins using maintaining alignment while permitting differential dilatation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/21—Utilizing thermal characteristic, e.g., expansion or contraction, etc.
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/21—Utilizing thermal characteristic, e.g., expansion or contraction, etc.
- Y10T403/217—Members having different coefficients of expansion
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T403/00—Joints and connections
- Y10T403/48—Shrunk fit
Definitions
- the invention relates to a non-positive and positive connection of rotating components according to the preamble of the independent claim.
- Such connections are found, for example, when assembling rotor disks of thermally highly loaded gas turbines.
- the rotor of a turbomachine generally consists of several rotor disks, which are axially strung together and aligned concentrically. These rotor disks are clamped together by one or more tie rods and thus form a compact unit.
- the rotors have a very high axial stiffness and centering [concentricity], which means that in the different operating states no unstable conditions, vibrations or eccentric running due to a shift in the center of gravity can occur, despite the inevitable differences Coefficient of thermal expansion of the different materials used.
- a Hirth toothing can be arranged on the end faces of the rotor disks.
- US 3713676 presents a positive and non-positive connection of rotor parts constructed from different materials, in which the risk of displacement is low, but at the same time a mechanical overload due to the different thermal expansion behavior of the components is avoided.
- end flanges of the rotor parts to be connected are assembled using a centering seat.
- the radial inner centering offset of the rotor part involved with the higher coefficient of thermal expansion is subjected to a radial force, and is thereby preloaded and pre-deformed.
- the pre-stressed and pre-deformed rotor part is relaxed due to the lower thermal expansion of the insert. This reduces the risk of material breakage under operating conditions.
- the permanent tension and deformation to which the material is subjected leads to signs of fatigue, which in turn increases the risk of misalignment under operating conditions.
- the invention tries to avoid these disadvantages. It is her job based on a non-positive and positive connection of rotating components create which is designed or can be retrofitted so that a operational misalignment [rotation or displacement] of components due to increased resistance to axial displacements is avoided.
- the basic idea of the invention is therefore, in the case of a non-positive and positive connection of axially preloaded rotating components which have a different expansion behavior in the area of the connection during rotation, by means of a stepped centering seat which has at least one positive, protruding centering offset and one negative, retracted Centering offset includes and an insert ring, which exerts a radial force on the positive centering offset, to manufacture the component with the negative centering offset and the insert ring from a material which has a higher thermal expansion coefficient than the material of the component with the positive centering offset, in which the insert ring is housed. On the occasion of the rotation, this measure ensures that the internal component is pressed against the external component and thus an increased resistance to axial displacements.
- the rotating components 1 and 2 as rotor disks 1, respectively 2 designated.
- the individual rotor disks are 1, 2 lined up axially and by at least one (not in the figures illustrated) tie rods clamped together concentrically.
- the through the Tension forces caused by tie rods result in a non-positive connection of the Rotor discs.
- these of the frictional forces resulting from the clamping forces are not sufficient to cause a misalignment to prevent the rotor disks against each other.
- this can be the case when the rotor disks are different during rotation Have stretching behavior, partly because they are made of different materials consist.
- This positive and non-positive connection is as Centering seat 3 is formed, which between two adjacent to each other Rotor disks are provided and biased by an insert ring 7. there the centering seat has the shape of a on the two adjacent rotor disks orbiting, concentric level with a positive, protruding Centering offset 4 on the rotor part 1 and a negative, drawn centering offset 5 on the rotor part 2.
- the insert ring 7 is on the rotor disk 1, which is on the inside relative to the centering seat arranged, namely in a cavity 6. It is biased to what on the occasion of Assembly can be done by thermal shrinking. On the occasion of the rotation Due to the mass-related centrifugal force, he presses the relative to the centering seat 3 internal rotor disc 1 against the external rotor disc 2 and creates a positive and non-positive connection.
- the positive and negative Centering offsets 4, 5 of this centering seat have essentially one cylindrical contact surface 8, which is concentric with the rotor axis. Of course, there is also a slightly conical alignment of the contact surface 8 possible.
- the centering seat prevents radial displacement and through that The contact pressure also increases the resistance to axial displacement of the rotor disks achieved against each other. Such shifts can be caused by the thermal expansions and thermal stresses at the high operating temperatures of the gas turbines are caused.
- the centering seat 3 is both in front of and behind the contact surface 8 provided with concave undercuts 10. Their facing the contact surface Fillets end within the contact area.
- the internal mechanical stress curve can be changed so that the Zones of greatest mechanical stress, i.e. of the greatest voltage gradient be moved from the area of the contact surface 8.
- both rotor parts achieved that among the specific ones mentioned Operating conditions in the contact area only crack-closing and thus Crack growth-preventing surface parallel compressive stresses arise.
- the insert ring 7 not all over, but only with part of its outer surface on the Rotor disc 1 is present. This can be achieved by using the ring a collar 11 is provided.
- the federal government is in its diameter and its axial extent so that it is a small on both sides of the collar Gap 12 generated between ring 7 and rotor disk 1. The smaller one now Contact surface results in a favorable, reduced heat transfer from the rotor disc on the insert ring.
- the rotor disk 1 - in the cavity 6 of the Insert ring 7 is housed - made of a ferritic steel with lower Expansion coefficient and the rotor disc 2 consists of an austenitic Steel with higher expansion coefficients is used as a material for the insert ring 7 is also preferably a material with higher expansion coefficients selected. In the case of thermally highly stressed gas turbines these material combinations for the rotor disks 1 and 2 are quite common.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Pressure Welding/Diffusion-Bonding (AREA)
- Mutual Connection Of Rods And Tubes (AREA)
Description
Solche Verbindungen finden sich beispielsweise beim Zusammenfügen von Rotorscheiben von thermisch hochbelasteten Gasturbinen.
Eine form- und kraftschlüssige Verbindung von aus unterschiedlichen Materialien aufgebauten Rotorteilen, in der die Gefahr eines Versetzens gering ist, aber gleichzeitig eine mechanische Überbeanspruchung durch das unterschiedliche Wärmeausdehnungsverhalten der Bauteile vermieden wird, stellt US 3713676 vor. Zu diesem Zweck werden Endflansche der zu verbindenden Rotorteile mittels Zentriersitz zusammengefügt. Mit Hilfe eines Einsatzkörpers wird der radial innere Zentrierversatz des beteiligten Rotorteils mit dem höheren Wärmeausdehnungskoeffizienten mit einer radialen Kraft beaufschlagt und dabei vorgespannt und vordeformiert. Beim Hochfahren in den Betriebszustand wird das vorgespannte und vordeformierte Rotorteil aufgrund der geringeren Wärmeausdehnung des Einsatzes entspannt. Dies verringert die Gefahr eines Materialbruchs unter Betriebsbedingungen. Die permanente Spannung und Deformation, der das Material unterliegt, führt zu Ermüdungserscheinungen, in deren Folge die Gefahr einer Dejustierung unter Betriebsbedingungen wiederum zunimmt.
Weitere Merkmale und Vorteile ergeben sich aus den Unteransprüchen.
Diese Massnahme gewährleistet anlässlich der Rotation ein Anpressen des innenliegenden Bauteils gegen das aussenliegende Bauteil und damit einen erhöhten Widerstand gegen axiale Verschiebungen.
Es zeigen:
- Fig. 1
- schematisch Ausschnitte von zwei benachbarten Rotorscheiben in einer ersten Ausführungsform;
- Fig. 2
- schematisch Ausschnitte von zwei benachbarten Rotorscheiben in einer zweiten Ausführungsform;
- Fig. 3
- den Zentriersitz aus Fig. 1 in vergrösserter Ansicht.
- 1
- rotierendes Bauteil, Rotorscheibe
- 2
- rotierendes Bauteil, Rotorscheibe
- 3
- Zentriersitz
- 4
- positiver Zentrierversatz
- 5
- negativer Zentrierversatz
- 6
- Hohlraum von 1
- 7
- Einlagering
- 8
- zylindrische Kontaktfläche
- 9
- doppelkonische Kontaktfläche
- 10
- Freistich
- 11
- Bund auf 7
- 12
- Spalt
Claims (6)
- Kraft- und formschlüssige Verbindung axial vorgespannter, rotierender Bauteile (1;2), welche im Bereich der Verbindung während der Rotation unterschiedliches Dehnungsverhalten aufweisen, mittels eines gestuften Zentriersitzes (3), welcher zumindest einen positiven, hervorstehenden Zentrierversatz (4) und einen negativen, eingezogenen Zentrierversatz (5) umfasst sowie einen Einlagering (7), welcher eine radiale Kraft auf den positiven Zentrierversatz (4) ausübt, dadurch gekennzeichnet, dass das Bauteil (2) mit dem negativen Zentrierversatz (5) und der Einlagering (7) aus einem Werkstoff bestehen, welcher einen höheren Wärmeausdehnungskoeffizienten aufweist als der Werkstoff des Bauteiles (1) mit dem positiven Zentrierversatz (4), in dem der Einlagering (7) untergebracht ist.
- Verbindung nach Anspruch 1, dadurch gekennzeichnet, dass der Einlagering (7) mit einem Bund (11) an dem mit ihm zusammenwirkenden Bauteil (1) anliegt.
- Verbindung nach Anspruch 1, dadurch gekennzeichnet, dass der Einlagering (7) vorgespannt ist.
- Verbindung nach Anspruch 1, dadurch gekennzeichnet, dass der Zentrierversatz (4, 5) des Zentriersitzes (3) zumindest annähernd zylindrisch oder leicht konisch ausgebildet ist.
- Verbindung nach Anspruch 4, dadurch gekennzeichnet, dass der Zentriersitz (3) sowohl vor als auch hinter der Kontaktfläche (8) mit konkaven Freistichen (10) versehen ist, deren der Kontaktfläche zugewandte Ausrundungen innerhalb der Kontaktfläche enden.
- Verbindung nach Anspruch 1, dadurch gekennzeichnet, dass der Zentriersitz (3) eine doppelkonische Kontaktfläche (9) aufweist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19728345 | 1997-07-03 | ||
DE19728345A DE19728345A1 (de) | 1997-07-03 | 1997-07-03 | Kraft- und formschlüssige Verbindung von rotierenden Bauteilen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0893576A2 EP0893576A2 (de) | 1999-01-27 |
EP0893576A3 EP0893576A3 (de) | 1999-12-08 |
EP0893576B1 true EP0893576B1 (de) | 2003-12-03 |
Family
ID=7834469
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98810441A Expired - Lifetime EP0893576B1 (de) | 1997-07-03 | 1998-05-14 | Verbindung von rotierenden Bauteilen |
Country Status (4)
Country | Link |
---|---|
US (2) | US6126357A (de) |
EP (1) | EP0893576B1 (de) |
JP (1) | JPH1172002A (de) |
DE (2) | DE19728345A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19728345A1 (de) * | 1997-07-03 | 1999-01-07 | Asea Brown Boveri | Kraft- und formschlüssige Verbindung von rotierenden Bauteilen |
DE10134611A1 (de) * | 2000-12-16 | 2002-06-27 | Alstom Switzerland Ltd | Fixiervorrichtung für eine Beschaufelung einer Strömungsmaschine |
GB0116479D0 (en) * | 2001-07-06 | 2001-08-29 | Rolls Royce Plc | Coupling arrangement |
DE10319629A1 (de) * | 2003-05-02 | 2004-11-18 | Zf Friedrichshafen Ag | Welle-Nabe-Verbindung |
FR2867223B1 (fr) * | 2004-03-03 | 2006-07-28 | Snecma Moteurs | Turbomachine comme par exemple un turboreacteur pour avion |
US20140064976A1 (en) * | 2012-08-14 | 2014-03-06 | Kevin L. Corcoran | Rotor keyhole fillet for a gas turbine engine |
GB2512016A (en) * | 2012-09-24 | 2014-09-24 | Arterius Ltd | Methods |
WO2016059348A1 (fr) * | 2014-10-15 | 2016-04-21 | Snecma | Ensemble rotatif pour turbomachine comprenant une virole de rotor auto-portee |
CN105570189B (zh) | 2014-10-31 | 2020-08-18 | 特灵国际有限公司 | 将叶轮固定至压缩机轴的系统和方法 |
US9909595B2 (en) * | 2015-07-21 | 2018-03-06 | General Electric Company | Patch ring for a compressor |
US10125785B2 (en) * | 2015-10-16 | 2018-11-13 | Pratt & Whitney | Reduced stress rotor interface |
US10190598B2 (en) * | 2016-02-18 | 2019-01-29 | Pratt & Whitney Canada Corp. | Intermittent spigot joint for gas turbine engine casing connection |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3088758A (en) * | 1958-02-12 | 1963-05-07 | Atomic Energy Authority Uk | Thermocompensating joint |
US3713676A (en) * | 1971-05-07 | 1973-01-30 | Gen Electric | Predeformed rabbit joint |
CH590414A5 (de) * | 1975-07-04 | 1977-08-15 | Bbc Brown Boveri & Cie | |
DE2643886C2 (de) * | 1976-09-29 | 1978-02-09 | Kraftwerk Union AG, 4330 Mülheim | Gasturbinentäufer in Scheibenbauart |
DE2851507C2 (de) * | 1978-11-29 | 1982-05-19 | Aktiengesellschaft Kühnle, Kopp & Kausch, 6710 Frankenthal | Isolations-Federkörper und dessen Verwendung |
AT378575B (de) * | 1979-10-25 | 1985-08-26 | Elin Union Ag | Rotor fuer eine thermische turbomaschine |
DE3625996A1 (de) * | 1986-07-31 | 1988-02-04 | Kuehnle Kopp Kausch Ag | Laufzeug fuer einen abgasturbolader |
US4859143A (en) * | 1987-07-08 | 1989-08-22 | United Technologies Corporation | Stiffening ring for a stator assembly of an axial flow rotary machine |
US4836750A (en) * | 1988-06-15 | 1989-06-06 | Pratt & Whitney Canada Inc. | Rotor assembly |
KR0154105B1 (ko) * | 1989-10-30 | 1998-11-16 | 제랄드 피. 루니 | 보어리스 허브 컴프레스 휠을 가진 터보차저 컴프레서 휠 조립체 |
US5056950A (en) * | 1990-08-31 | 1991-10-15 | Allied-Signal Inc | Thermally activated joint |
US5163816A (en) * | 1991-07-12 | 1992-11-17 | General Motors Corporation | Wheel lock, centering and drive means and turbocharger impeller combination |
DE4141427A1 (de) * | 1991-12-16 | 1993-06-17 | Stroemungsmaschinen Gmbh | Gasturbine mit einem radialverdichter aus aluminium |
US5503490A (en) * | 1994-05-13 | 1996-04-02 | United Technologies Corporation | Thermal load relief ring for engine case |
DE19540745A1 (de) * | 1995-11-02 | 1997-05-07 | Asea Brown Boveri | Verdichterrad-Wellenverbindung |
DE19728085A1 (de) * | 1997-07-02 | 1999-01-07 | Asea Brown Boveri | Fügeverbindung zwischen zwei Fügepartnern sowie deren Verwendung |
DE19728345A1 (de) * | 1997-07-03 | 1999-01-07 | Asea Brown Boveri | Kraft- und formschlüssige Verbindung von rotierenden Bauteilen |
-
1997
- 1997-07-03 DE DE19728345A patent/DE19728345A1/de not_active Withdrawn
-
1998
- 1998-05-14 DE DE59810313T patent/DE59810313D1/de not_active Expired - Lifetime
- 1998-05-14 EP EP98810441A patent/EP0893576B1/de not_active Expired - Lifetime
- 1998-06-29 US US09/106,096 patent/US6126357A/en not_active Expired - Fee Related
- 1998-07-02 JP JP10187326A patent/JPH1172002A/ja active Pending
-
2000
- 2000-07-17 US US09/617,916 patent/US6276863B1/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH1172002A (ja) | 1999-03-16 |
US6126357A (en) | 2000-10-03 |
EP0893576A2 (de) | 1999-01-27 |
US6276863B1 (en) | 2001-08-21 |
DE19728345A1 (de) | 1999-01-07 |
DE59810313D1 (de) | 2004-01-15 |
EP0893576A3 (de) | 1999-12-08 |
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