EP0889202A2 - Fügeverbindung - Google Patents
Fügeverbindung Download PDFInfo
- Publication number
- EP0889202A2 EP0889202A2 EP98810411A EP98810411A EP0889202A2 EP 0889202 A2 EP0889202 A2 EP 0889202A2 EP 98810411 A EP98810411 A EP 98810411A EP 98810411 A EP98810411 A EP 98810411A EP 0889202 A2 EP0889202 A2 EP 0889202A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- joining
- joining partners
- flat
- cylindrical
- backstitch
- 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.)
- Granted
Links
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
- F01D5/30—Fixing blades to rotors; Blade roots ; Blade spacers
- F01D5/3007—Fixing blades to rotors; Blade roots ; Blade spacers of axial insertion type
-
- 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.
Definitions
- the invention relates to a joint connection between two joining partners, the at least one flat, cylindrical or conical surface section over which the joining partners are subjected to force and slide on one another can be brought into contact in such a way that the flat, cylindrical or conical Only partially overlap surface sections of both joining partners and in the area of contact form a common contact surface.
- Machine parts that are subjected to force in the system network via mutual contact surfaces and collide in a loose bond experience normal material fatigue due to transient or other differential movements superficial Cracks caused by further mechanical stress due to crack growth Total failure of the machine parts.
- Differential movements between machine parts occur particularly everywhere there on which the machine parts are exposed to vibrations or thermal loads are.
- thermal loads adjacent materials are subject with different thermal expansion behavior or as a result of different faster heating or cooling relative movements, although the individual Machine parts designed for a stationary application, for example have been.
- alternating loads caused by mechanical vibrations act continuously on machine parts, but also with temperature changes, form perpendicular to the contact surface of the machine parts that meet microscopic flaws that continue to operate due to prevailing Alternating loads to a crack growth normal to the contact surface can lead into the damaged material.
- Machine components are fastenings of turbine blades in a rotor jacket of a gas turbine arrangement provided with blade attachments.
- the individual turbine blades have so-called grip pins on their shafts on which provide a contour with which they can be inserted into a corresponding shape to be attached to the rotor housing.
- the recording form on the rotor housing provides receiving slots in a manner known per se, into which the gripping pins each single turbine blade is insertable and the corresponding mechanical Counter bearings, which are provided in the receiving slots, can be fixed.
- FIG. 2a shows a schematic example for representing the contact surface of a known mechanical counter bearing, which is part of a receiving slot.
- the joining partner 1 which based on the above example Handle part corresponds to a turbine blade, has a cylindrical surface section 11, via which the joining partner 1 also has a cylindrical surface section 21 of a joining partner 2 connects.
- the joint is designed so that joining partners 1 and 2 relative to each other, at least along of the cylindrical surface sections can slide as far as the e.g. require thermal expansion differences.
- Suspension of turbine blades in the rotor housing is subject to that shown in FIG.
- FIG. 2a known joint connection of two joining partners 1 and 2 illustrates that the Occurrence of increasing cracks in zones with the highest mechanical stress densities S1 and S2 are more common.
- the in Fig. 2c quasi as contour lines in the cross sections of the joining partners 1 and 2 drawn lines represent areas each represents the same voltage values. It is striking that the zones of highest voltage densities within the flat surface sections in which both joining partners are located touch, occur near a contour transition of the joining partners. Characteristic there is also the occurrence of tensile stresses in such a stress distribution outside the contact area of the two joining partners under certain Operating conditions, the growth of cracks once created favor.
- the invention has for its object to provide a joint connection between two joining partners, the at least one flat, cylindrical or conical surface section have, over which the joining partners are subjected to force and on each other are slidably brought into contact in such a way that the flat, cylindrical or only partially overlap conical surface sections of both joining partners and form a common contact surface in the contact area, that the growth of superficial cracks up to the total loss of a Joining partners can lead, should be avoided.
- the joint connection should by appropriate shaping of the joining partners the use of common Allow materials and the mechanical as well as thermal loads, especially when used in gas turbine construction.
- a joint connection between two joining partners each have at least one flat, cylindrical or conical surface section, by means of which the joining partners are acted upon by force and slide onto one another in such a way can be brought that the flat, cylindrical or conical surface sections overlap both joining partners only partially and one in the area of contact form common contact surface, developed in such a way that the flat, cylindrical or conical surface sections of the joining partners each by at least a backstitch are limited on one side, and that the joining partners in such a way can be brought that the joint contact surface of the joining partners in one Direction through the backstitch of one joining partner and in the opposite Direction is limited by the back stitch of the other joining partner.
- the invention is based on the idea of geometrically shaping the joining partners in the joining area the internal mechanical stress curve in this way to change the zones of greatest mechanical stress, i.e. the greatest Stress gradient is shifted from the area of the contact surface and at the same time those zones of each joining partner in which under certain operating conditions crack-opening and thus crack growth-promoting surface parallel Tensile stresses can occur, the contact area of the other To withdraw joining partners so that no fretting cracks can occur there. Furthermore, the design of the coverage of the Front edge of the back stitch of the other joining partner through one of the expected relative movements and installation tolerances exceeding extension the contact surfaces of both joining partners achieved that under the operating conditions mentioned in the contact area only crack-closing and thus crack growth-preventing Compressive stresses parallel to the surface occur.
- joining partner 1 shows an advantageous embodiment of a joint connection according to the invention shown, according to which a joining partner 1 along its flat, cylindrical or conical surface section 11 with a common bearing surface 3 a flat, cylindrical or conical surface section 21 of a joining partner 2 slidingly (see arrows) connects.
- the joining partner 1 is such designed that the bearing surface 11 in the example shown one-sided an understitch 12 in the form of an angular transition edge that provides the flat surface section 11 connects with a concave rear stitch shape 24.
- Corresponding the joining partner 2 is formed, which also has an undercut on one side 22, which has the flat surface section 21 with the concave shaped understitch shape 24 connects.
- the joint connection according to the invention which is a pressurized and slidable provides a supported connection of the joining partners 1 and 2, has a contact surface 3 through which both joining partners physically connect, which can be expected from all Relative movements and installation tolerances in one direction through the Backstitch 12 of a joining partner 1 and in the opposite direction the backstitch 22 of the other joining partner 2 is limited.
- the configuration of the joining partners according to the invention makes it possible to define the zones of the greatest stress gradient in the area of the rear molds 14 and 24 to shift, as well as to avoid crack-opening, surface-parallel tensions.
- FIG. 3 shows a typical cross section through a joint connection according to the invention between the joining partners 1 and 2 with drawn-in voltage profiles forth.
- the zones are also located greatest tension gradients 15 and 25 in the area of the backstitch shapes S1 and S2.
- the contact surface 3 In the area of the contact surface 3, however, there is only a weakly extending one Stress gradient and compressive stresses parallel to the surface, see above that prevents the growth of superficial cracks in the contact surface 3 becomes.
- FIG. 4 shows an embodiment with two joining connections according to the invention 4 and 5 between the joining partners 1 and 2.
- the embodiment shown shows part of a handle pin - corresponds to joining partner 1 -, one Turbine blade, which is in the receiving slot of a rotor housing - joining partner 2 - is introduced.
- the individual backstitch shapes are toroidal.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
- Connection Of Plates (AREA)
Abstract
Description
- Fig. 1
- schematisierter Querschnitt durch ein Ausführungsbeispiel einer erfindungsgemäßen Fügeverbindung zwischen zwei Fügepartnern,
- Fig. 2a
- schematisierter Querschnitt durch eine an sich bekannte Fügeverbindung,
- Fig. 2b
- schematisierter Querschnitt gemäß Fig. 2a mit Materialanrissen,
- Fig. 2c
- schematisierter Querschnitt durch eine an sich bekannte Fügeverbindung mit Spannungsverläufen,
- Fig. 3
- schematisierter Querschnitt durch ein Ausführungsbeispiel einer erfindungsgemäßen Fügeverbindung mit Spannungsverläufen sowie
- Fig. 4
- Teilquerschnitt durch den Fügebereich eines Griffzapfens einer Turbinenschaufel in einer Aufnahmeschiene eines Rotorgehäuses.
- 1
- Fügepartner
- 11
- ebener Flächenabschnitt
- 12
- Hinterstich
- 13
- überragender Flächenabschnitt
- 14
- Hinterstichform
- 2
- Fügepartner
- 21
- ebener Flächenabschnitt
- 22
- Hinterstich
- 23
- überragender Flächenabschnitt
- 24
- Hinterstichform
- 3
- Auflagefläche
- 4
- Fügeverbindung
- 5
- Fügeverbindung
- A1
- Anriß
- A2
- Anriß
- S1
- Zone mit größtem Spannungsgradienten
- S2
- Zone mit größtem Spannungsgradienten
Claims (9)
- Fügeverbindnung zwischen zwei Fügepartnern (1, 2), die jeweils wenigstens einen ebenen, zylindrischen oder konischen Flächenabschnitt (11, 21) aufweisen, über den die Fügepartner kraftbeaufschlagt und aufeinander gleitend derart in Berührung bringbar sind, daß sich die ebenen, zylindrischen oder konischen Flächenabschnitte (11, 21) beider Fügepartner (1, 2) nur teilweise überlappen und im Berührungsbereich eine gemeinsame Auflagefläche (3) bilden,
dadurch gekennzeichnet, daß die ebenen, zylindrischen oder konischen Flächenabschnitte (11, 21) der Fügepartner (1, 2) jeweils durch wenigstens einen Hinterstich (12, 22) einseitig begrenzt sind,
und daß die Fügepartner derart in Verbindung bringbar sind, daß die gemeinsame Auflagefläche (3) der Fügepartner (1, 2) in einer Richtung durch den Hinterstich (12) des einen Fügepartners (1) und in entgegengesetzter Richtung durch den Hinterstich (22) des anderen Fügepartners (2) begrenzt ist. - Fügeverbindung nach Anspruch 1,
dadurch gekennzeichnet, daß Flächenbereiche (13, 23) der ebenen, zylindrischen oder konischen Flächenabschnitte (11, 21) eines Fügepartners den Hinterstich des jeweils anderen Fügepartners überragen. - Fügeverbindung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß der Hinterstich (12, 22) als Übergangskante ausgebildet ist und den ebenen, zylindrischen oder konischen Flächenabschnitt (11, 21) mit einer konkaven Ausformung (14, 24), der Hinterstichform, verbindet. - Fügeverbindung nach Anspruch 3,
dadurch gekennzeichnet, daß die Übergangskante rund oder kantig ausgeformt ist. - Fügeverbindung nach Anspruch 4,
dadurch gekennzeichnet, daß die Hinterstichform (14, 24) wenigstens einen torusmässig geformten Bereich aufweist. - Fügeverbindung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet, daß die Hinterstiche (12, 22) beider Fügepartner paarweise parallel verlaufen. - Fügeverbindung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet, daß der Verlauf der Hinterstiche (12, 22) der Fügepartner weitgehend senkrecht zur relativen Gleitbewegung der Fügepartner orientiert ist. - Verwendung der Fügeverbindung nach einem der Ansprüche 1 bis 7,
als Steckverbindung von bewegten oder stillstehenden Maschinenteilen zur Kompensation von Relativbewegungen zwischen den Maschinenteilen sowie der Materialrißvermeidung an der Auflagefläche (3). - Verwendung nach Anspruch 8,
dadurch gekennzeichnet, daß die Maschienenteile Zentriersitze oder Schaufeleinhängungen von Turbinenschaufeln sind, in die entsprechend geformte Sitzpassungen von Turbinenschaufeln einsetzbar sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19728085 | 1997-07-02 | ||
DE19728085A DE19728085A1 (de) | 1997-07-02 | 1997-07-02 | Fügeverbindung zwischen zwei Fügepartnern sowie deren Verwendung |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0889202A2 true EP0889202A2 (de) | 1999-01-07 |
EP0889202A3 EP0889202A3 (de) | 2000-02-02 |
EP0889202B1 EP0889202B1 (de) | 2004-02-25 |
Family
ID=7834319
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98810411A Expired - Lifetime EP0889202B1 (de) | 1997-07-02 | 1998-05-07 | Fügeverbindung |
Country Status (5)
Country | Link |
---|---|
US (1) | US6106188A (de) |
EP (1) | EP0889202B1 (de) |
JP (1) | JPH1172106A (de) |
CN (1) | CN1132994C (de) |
DE (2) | DE19728085A1 (de) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2343225A (en) * | 1998-09-28 | 2000-05-03 | Gen Electric Co Plc | Stress relieved dovetail |
EP2546465A1 (de) | 2011-07-14 | 2013-01-16 | Siemens Aktiengesellschaft | Schaufelfuss, zugehörige Schaufel, Rotorscheibe und Turbomaschinenanordnung |
EP2407637A3 (de) * | 2010-07-14 | 2014-08-27 | General Electric Company | Schwalbenschwanzverbindung für Turbinenrotorschaufel und Rotorrad |
AT517878A1 (de) * | 2015-11-06 | 2017-05-15 | Ge Jenbacher Gmbh & Co Og | Pleuel |
FR3091552A1 (fr) * | 2019-01-09 | 2020-07-10 | Safran Aircraft Engines | Alvéole de disque de rotor destiné à recevoir une aube de turbomachine |
Families Citing this family (20)
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 |
US6183202B1 (en) * | 1999-04-30 | 2001-02-06 | General Electric Company | Stress relieved blade support |
SG130030A1 (en) | 1999-10-21 | 2007-03-20 | Technolas Gmbh | Customized corneal profiling |
KR100649580B1 (ko) * | 2003-12-15 | 2006-11-28 | 삼성전기주식회사 | 스핀코팅에 의한 적층세라믹 커패시터의 제조방법 및적층세라믹 커패시터 |
US7156612B2 (en) * | 2005-04-05 | 2007-01-02 | Pratt & Whitney Canada Corp. | Spigot arrangement for a split impeller |
WO2006124614A2 (en) * | 2005-05-12 | 2006-11-23 | General Electric Company | Blade/disk dovetail backcut for blade/disk stress reduction (9fa+e, stage 2) |
WO2006124619A2 (en) * | 2005-05-12 | 2006-11-23 | General Electric Company | BLADE/DISK DOVETAIL BACKCUT FOR BLADE/DISK STRESS REDUCTION (7FA+e, STAGE 2) |
US7594799B2 (en) * | 2006-09-13 | 2009-09-29 | General Electric Company | Undercut fillet radius for blade dovetails |
US9359905B2 (en) | 2012-02-27 | 2016-06-07 | Solar Turbines Incorporated | Turbine engine rotor blade groove |
US9366151B2 (en) * | 2012-05-07 | 2016-06-14 | General Electric Company | System and method for covering a blade mounting region of turbine blades |
US20140119821A1 (en) * | 2012-10-30 | 2014-05-01 | Jeffrey Lee Bertelsen | Insert slot and method of forming an insert slot in a rotary hand slip |
US20140260321A1 (en) * | 2013-03-15 | 2014-09-18 | United Technologies Corporation | Gas turbine engine static structure joint with undercuts |
KR101398985B1 (ko) * | 2013-03-26 | 2014-05-27 | 주식회사 일진글로벌 | 테이퍼 롤러 휠 베어링 조립체 |
EP2860361B1 (de) | 2013-10-08 | 2017-03-01 | MTU Aero Engines GmbH | Bauteilabstützung und Strömungsmaschine |
GB201416505D0 (en) | 2014-09-18 | 2014-11-05 | Rolls Royce Plc | Gas turbine engine |
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 |
FR3091553B1 (fr) * | 2019-01-09 | 2021-04-02 | Safran Aircraft Engines | Aube destinée à être montée sur un disque de rotor d’une turbomachine |
CN110030237A (zh) * | 2019-04-22 | 2019-07-19 | 江苏荣耀天翃航空科技有限公司 | 一种碳纤维型材及碳纤维型材的榫卯结构组件 |
US11578607B2 (en) * | 2020-12-15 | 2023-02-14 | Pratt & Whitney Canada Corp. | Airfoil having a spline fillet |
Family Cites Families (16)
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US2729422A (en) * | 1951-04-06 | 1956-01-03 | Maschf Augsburg Nuernberg Ag | Shaped article of ceramic material |
GB779059A (en) * | 1954-07-15 | 1957-07-17 | Rolls Royce | Improvements in or relating to axial-flow fluid machines, for example compressors orturbines of gas-turbine engines |
US3045968A (en) * | 1959-12-10 | 1962-07-24 | Gen Motors Corp | Fir tree blade mount |
DE2242448A1 (de) * | 1972-08-29 | 1974-03-07 | Motoren Turbinen Union | Laufrad fuer stroemungsmaschine |
US4191509A (en) * | 1977-12-27 | 1980-03-04 | United Technologies Corporation | Rotor blade attachment |
US4304523A (en) * | 1980-06-23 | 1981-12-08 | General Electric Company | Means and method for securing a member to a structure |
DE3133158C1 (de) * | 1981-08-21 | 1982-12-16 | MTU Motoren- und Turbinen-Union München GmbH, 8000 München | Pressflaechen-Zwischenlage aus Metall und Verfahren zur Herstellung derselben |
JPS59113206A (ja) * | 1982-12-20 | 1984-06-29 | Hitachi Ltd | タ−ボ機械のブレ−ド取付構造 |
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US4824328A (en) * | 1987-05-22 | 1989-04-25 | Westinghouse Electric Corp. | Turbine blade attachment |
GB2238581B (en) * | 1989-11-30 | 1994-01-12 | Rolls Royce Plc | Improved attachment of a gas turbine engine blade to a turbine rotor disc |
US5141401A (en) * | 1990-09-27 | 1992-08-25 | General Electric Company | Stress-relieved rotor blade attachment slot |
US5160242A (en) * | 1991-05-31 | 1992-11-03 | Westinghouse Electric Corp. | Freestanding mixed tuned steam turbine blade |
DE4215050C2 (de) * | 1992-05-07 | 1997-07-17 | Audi Ag | Vorrichtung an zumindest zwei benachbart auf einer Achse oder Welle dreh- oder schwenkbar zu lagernden metallischen Bauteilen |
JPH0777008A (ja) * | 1993-09-09 | 1995-03-20 | Mitsubishi Heavy Ind Ltd | タービンの翼溝構造 |
DE4435268A1 (de) * | 1994-10-01 | 1996-04-04 | Abb Management Ag | Beschaufelter Rotor einer Turbomaschine |
-
1997
- 1997-07-02 DE DE19728085A patent/DE19728085A1/de not_active Withdrawn
-
1998
- 1998-05-07 DE DE59810818T patent/DE59810818D1/de not_active Expired - Lifetime
- 1998-05-07 EP EP98810411A patent/EP0889202B1/de not_active Expired - Lifetime
- 1998-06-29 US US09/106,097 patent/US6106188A/en not_active Expired - Lifetime
- 1998-06-30 CN CN98115609A patent/CN1132994C/zh not_active Expired - Lifetime
- 1998-07-01 JP JP10186051A patent/JPH1172106A/ja active Pending
Non-Patent Citations (1)
Title |
---|
None |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2343225A (en) * | 1998-09-28 | 2000-05-03 | Gen Electric Co Plc | Stress relieved dovetail |
GB2343225B (en) * | 1998-09-28 | 2003-01-08 | Gen Electric Co Plc | Stress relieved dovetail |
EP2407637A3 (de) * | 2010-07-14 | 2014-08-27 | General Electric Company | Schwalbenschwanzverbindung für Turbinenrotorschaufel und Rotorrad |
EP2546465A1 (de) | 2011-07-14 | 2013-01-16 | Siemens Aktiengesellschaft | Schaufelfuss, zugehörige Schaufel, Rotorscheibe und Turbomaschinenanordnung |
WO2013007587A1 (en) | 2011-07-14 | 2013-01-17 | Siemens Aktiengesellschaft | Blade root, corresponding blade, rotor disc, and turbomachine assembly |
RU2612675C2 (ru) * | 2011-07-14 | 2017-03-13 | Сименс Акциенгезелльшафт | Хвостовик лопатки, соответствующая лопатка, диск ротора и узел турбомашины |
US10287898B2 (en) | 2011-07-14 | 2019-05-14 | Siemens Aktiengesellschaft | Blade root, corresponding blade, rotor disc, and turbomachine assembly |
AT517878A1 (de) * | 2015-11-06 | 2017-05-15 | Ge Jenbacher Gmbh & Co Og | Pleuel |
AT517878B1 (de) * | 2015-11-06 | 2017-11-15 | Ge Jenbacher Gmbh & Co Og | Pleuel |
US10876571B2 (en) | 2015-11-06 | 2020-12-29 | Innio Jenbacher Gmbh & Co Og | Connecting rod |
FR3091552A1 (fr) * | 2019-01-09 | 2020-07-10 | Safran Aircraft Engines | Alvéole de disque de rotor destiné à recevoir une aube de turbomachine |
Also Published As
Publication number | Publication date |
---|---|
US6106188A (en) | 2000-08-22 |
EP0889202A3 (de) | 2000-02-02 |
CN1206075A (zh) | 1999-01-27 |
CN1132994C (zh) | 2003-12-31 |
EP0889202B1 (de) | 2004-02-25 |
JPH1172106A (ja) | 1999-03-16 |
DE19728085A1 (de) | 1999-01-07 |
DE59810818D1 (de) | 2004-04-01 |
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