EP2268902A1 - Strut for an intermediate turbine housing, intermediate turbine housing, and method for producing an intermediate turbine housing - Google Patents
Strut for an intermediate turbine housing, intermediate turbine housing, and method for producing an intermediate turbine housingInfo
- Publication number
- EP2268902A1 EP2268902A1 EP09733098A EP09733098A EP2268902A1 EP 2268902 A1 EP2268902 A1 EP 2268902A1 EP 09733098 A EP09733098 A EP 09733098A EP 09733098 A EP09733098 A EP 09733098A EP 2268902 A1 EP2268902 A1 EP 2268902A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strut
- flange
- housing
- intermediate housing
- 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.)
- Granted
Links
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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/162—Bearing supports
-
- 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
- F01D9/00—Stators
- F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
- F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
- F01D9/042—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector fixing blades to stators
Definitions
- the present invention relates to a strut for a turbine intermediate housing of a turbomachine, in particular a gas turbine, having a first end for placement on an inner structure of the turbine intermediate housing and a first end opposite the first end for attaching the strut to a housing or an inner boundary wall of the turbine center frame.
- the invention further relates to a turbine intermediate housing for a turbomachine, in particular a gas turbine and a method for producing a turbine intermediate housing of a turbomachine, in particular a gas turbine. 5
- Turbine intermediate housings are arranged in turbomachines, in particular in a gas turbine of an aircraft engine between the high-pressure turbine and the low-pressure turbine.
- the Turbine Center Frame (TCF) is a structural member and has the function of forming a flow channel between the high pressure turbine and the low pressure turbine and structurally connecting the bearing chamber of at least the high pressure rotor to the housing
- TCF Turbine Center Frame
- profiled struts that hold a bearing chamber for the turbine rotor intersect the gas channel, which is why these struts are clad with vane-like components, and the struts together with the bearing chamber or im- plant structure have proven cost-effective
- the strut shrouds must be radially mountable from outside over the struts, but since the free strut ends are mounted to a housing or inner boundary wall of the turbine shroud n, they usually have a thickening or a flange in this area, which in this type of installation has the width of the
- Strut cover defined. Disadvantageously, therefore, in such struts only Strut coverings are used, which are designed to be correspondingly wide and not optimized for flow. However, this reduces the efficiency of the gas turbine, since relatively high flow losses occur. To avoid this, in other known turbine intermediate housings, an integral formation of the struts with the inner structure, ie, for example, an integrally cast bearing star, is dispensed with. However, this in turn increases the cost of manufacturing the turbine hub.
- a strut according to the invention for a turbine intermediate housing of a turbomachine in particular for a gas turbine, has a first end for arrangement on an inner structure of the turbine intermediate housing and a first end opposite to the first end second end for attachment of the strut to a housing or an inner boundary wall of the turbine intermediate housing, wherein at the second end at least one flange-like element with at least one first opening for receiving or passing through a fastening means is detachably arranged.
- the strut according to the invention Due to the detachable arrangement of the flange-like element, it is possible first to push a flow-optimized strut trim radially from the outside over the strut and only then to arrange the flange-like element at the second end and the strut by means of the flange-like element on the housing or the inner boundary wall of the turbine intermediate housing to fix.
- the possibility of mounting slimmer, strörnungsoptim convinced strut fairings the flow losses within the turbine intermediate housing are significantly reduced, which in turn results in a higher efficiency of the turbomachine.
- the strut according to the invention it is advantageously possible for the strut according to the invention to be used as part of an integrally cast bearing star whose production is cost-effective to implement.
- this has in the region of the second end at least one groove or recess into which a corresponding projection of the flange-like element can engage.
- this has at least one additional peripheral or non-circumferential flange at the second end.
- the flange-like element attaches to the flange of the strut in this embodiment.
- the flange can form at least one support surface for supporting a shoulder of the flange-like element.
- the flange-like element has at least one support surface for support on the housing or the inner boundary wall of the turbine intermediate housing. The formation of an additional support surface results in a uniform pressure distribution between the strut 5 and the housing or the inner boundary wall of the turbine intermediate housing.
- the strut at the second end at least a second opening for receiving or hm slidebowung a mounting means on.
- the second opening may be formed in the flange or in a second flange-like element. The formation of a second opening results in a firm and intimate connection between these elements after the attachment of the strut to the housing or the inner boundary wall of the turbine intermediate housing. It is also conceivable that this connection not only with two fasteners, but 5 also takes place with a variety of fasteners.
- the fastener is a screw.
- corresponding openings for receiving a clamping pin are formed in the flange at the second o end of the strut and the flange-like element.
- the dowel pin advantageously serves to hold the flange-like element on the strut during attachment, in particular screwing to the housing or the inner boundary wall of the turbine intermediate housing. 5
- the strut is formed integrally with the inner structure of the turbine intermediate housing.
- the strut is at least partially surrounded by a strut cladding, wherein the strut cladding is designed to optimize flow.
- the strut cladding may consist of a heat-resistant material.
- the turbine intermediate housing according to the invention has a higher efficiency in comparison with known turbine mantle housings, since the struts used are provided with flow-optimized strut cladding.
- the slender and flow-optimized strut claddings reduce flow losses and thus enable a higher efficiency of the gas turbine, in particular of the aircraft engine.
- An inventive method for producing a turbine intermediate housing of a turbomachine, in particular a gas turbine comprises the following steps: a) providing an inner structure of the turbine intermediate housing with a plurality of radially arranged struts, wherein the struts are each formed as described above; b) mounting at least one strut cladding on the individual struts, wherein the strut cladding surrounds the strut in whole or in part, and the mounting takes place radially from the outside; c) connecting the second ends of the struts with at least one flange-like element; and d) connecting the flange-like elements or the flange-like elements and the respective flange of the struts to a housing or an inner boundary wall of the turbine housing.
- the method according to the invention enables a rapid production of the turbine intermediate housing as a whole and a simple and rapid cladding of struts of the turbine intermediate housing with a flow-optimized and slender strut cladding.
- the thickenings usually formed at the free strut ends of the struts according to the prior art no longer determine the width of the strut cladding.
- the usable slimmer and flow-optimized strut coverings reduce the flow losses within the turbine intermediate housing and thus allow a higher efficiency of the turbomachine.
- the connection according to method step d) by means of a screwing.
- the compound according to method step c) can be effected by means of a clamping pin, which is mounted in the flange of the second end of the strut and the flange-like element in corresponding openings. This ensures a fast and secure fixation of the flange-like element on the strut.
- Figure 1 is a schematic representation of a strut according to the invention for a turbine intermediate housing according to a first embodiment
- Figure 2 is a schematic representation of a strut according to the invention for a turbine intermediate housing according to a second embodiment.
- FIG. 1 shows a schematic representation of a strut 10 for a turbine intermediate housing of a turbomachine, in particular a gas turbine for an aircraft engine.
- the strut 10 is formed in one piece with an inner structure of the turbine intermediate housing (not shown).
- a plurality of struts 10 together with the inner structure form a so-called integrally molded bearing star.
- the bearing star serves to support shafts or rotors of a gas turbine, hl of Figure 1, the strut 10 is shown in a top view in a plan view and in a lower portion in a corresponding sectional view. It becomes clear that the strut 10 is profiled.
- the strut 10 has a first end for placement on the inner structure of the turbine hub (not shown) and a second end 12 opposite the first end for attachment of the strut 10 to a housing 42 (see FIG. 2) or an inner boundary wall of the turbine intermediate housing.
- a flange-like element 14 with a first opening 18 for receiving a fastening means, in particular a screw (not shown), detachably arranged.
- the flange-like element 14 is elongated in the illustrated embodiment, wherein the maximum of the longitudinal extent along the longitudinal axis of the strut 10 extends.
- the flange-like element 14 has a projection 34 which engages in a groove 32 formed on the strut 10.
- the flange-like element 14 also has a shoulder 36 which is supported on a support surface 38 of a flange 16 of the strut 10.
- the flange 16 is formed partially circumferential in the illustrated embodiment, the second end 12 of the strut 10.
- a second opening 22 is formed for receiving a second fastening means.
- both the first opening 18 and the second opening 22 each have an internal thread 20, 24 for the introduction and fastening of a screw with a corresponding external thread.
- the second opening 22 is formed in the flange 16.
- corresponding openings 26, 28 are formed for receiving a clamping pin 30.
- a simple and secure attachment of the flange-like element 14 to the strut 10 in the region of the second end 12 is possible.
- a flow-optimized, slim strut cover is pushed over the strut 10 from the outside.
- the flange-like element 14 is fastened to the strut 10 with the aid of the tensioning pin 30, so that in a further step the screwing of the second end 12 of the strut 10 to the housing 42 can take place.
- the strut 10 is hollow and has a gas channel 40.
- Figure 2 shows a schematic representation of a strut 10 according to a second embodiment. Also in Figure 2 is in the upper area a plan view of the strut 10th and a corresponding sectional view of the strut 10 is shown in a lower area.
- the strut 10 according to the second embodiment basically has a construction comparable to the strut 10 according to the first embodiment described in FIG.
- the same reference numerals in FIGS. 1 and 2 therefore each designate the same elements of the struts 10.
- the flange-like element 14 is not arranged approximately parallel to the longitudinal axis of the strut 10 in its longitudinal direction.
- the longitudinal axis of the likewise elongated flange-like element 14 extends approximately perpendicular to the longitudinal axis of the strut 10. It can be seen that at the end facing away from the strut 10 of the flange-like element 14, a support surface 44 for supporting the housing 42 is formed. At the end opposite the support surface 44, the flange-like element 14 in turn has a projection 34 which engages in a corresponding groove or recess 32 in the region of the second end 12 of the strut 10. In this case, the recess 32 and the projection 34 are formed such that parallel surfaces form, which prevent the flange-like element 14 from rotating relative to the strut 10 during assembly.
- the flange-like element 14 is in turn held by means of a clamping pin 30 on the strut 10.
- the flange 16 of the second end 12 of the strut 10 in turn has an opening 26 which corresponds to an opening 28 in the flange-like element 14.
- the opening 28 is formed in the illustrated embodiment in the projection 34.
- the opening 26 extends on both sides of the walls 32 surrounding the recess 32 of the flange 16th
- the housing 42 For fixing the housing 42 to the strut 10, the housing 42 also has two openings 46, 48, which correspond to the first opening 20 and the second opening 22 of the flange-like element 14 and the flange 16.
- the connection of the housing 42 with the strut 10 takes place by means of a screw connection.
- the strut 10 is provided with a corresponding strut cladding, which is designed to be flow-optimized, as has already been described with the exemplary embodiment presented in FIG.
- the FIGS. Brace 10 is integrally formed with an inner structure of the turbine intermediate case (not shown).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008019156A DE102008019156A1 (en) | 2008-04-17 | 2008-04-17 | Strut for a turbine intermediate housing, turbine intermediate housing and method for producing a turbine intermediate housing |
PCT/DE2009/000527 WO2009127203A1 (en) | 2008-04-17 | 2009-04-17 | Strut for an intermediate turbine housing, intermediate turbine housing, and method for producing an intermediate turbine housing |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2268902A1 true EP2268902A1 (en) | 2011-01-05 |
EP2268902B1 EP2268902B1 (en) | 2013-07-10 |
Family
ID=41055177
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09733098.9A Not-in-force EP2268902B1 (en) | 2008-04-17 | 2009-04-17 | Strut for an intermediate turbine housing and intermediate turbine housing |
Country Status (4)
Country | Link |
---|---|
US (1) | US8579583B2 (en) |
EP (1) | EP2268902B1 (en) |
DE (1) | DE102008019156A1 (en) |
WO (1) | WO2009127203A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008019156A1 (en) * | 2008-04-17 | 2009-10-22 | Mtu Aero Engines Gmbh | Strut for a turbine intermediate housing, turbine intermediate housing and method for producing a turbine intermediate housing |
FR2981700B1 (en) * | 2011-10-24 | 2016-08-26 | Snecma Propulsion Solide | DEVICE FOR FIXING A HOLLOW PIECE |
US9822667B2 (en) | 2015-04-06 | 2017-11-21 | United Technologies Corporation | Tri-tab lock washer |
US10247035B2 (en) | 2015-07-24 | 2019-04-02 | Pratt & Whitney Canada Corp. | Spoke locking architecture |
US10443449B2 (en) | 2015-07-24 | 2019-10-15 | Pratt & Whitney Canada Corp. | Spoke mounting arrangement |
CA2936180A1 (en) | 2015-07-24 | 2017-01-24 | Pratt & Whitney Canada Corp. | Multiple spoke cooling system and method |
DE102016204660A1 (en) | 2016-03-22 | 2017-09-28 | MTU Aero Engines AG | Method for producing a housing of a turbomachine and housing of a turbomachine |
US10781721B2 (en) | 2018-02-09 | 2020-09-22 | General Electric Company | Integral turbine center frame |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4987736A (en) | 1988-12-14 | 1991-01-29 | General Electric Company | Lightweight gas turbine engine frame with free-floating heat shield |
EP0550126A1 (en) * | 1992-01-02 | 1993-07-07 | General Electric Company | Thrust augmentor heat shield |
US5292227A (en) | 1992-12-10 | 1994-03-08 | General Electric Company | Turbine frame |
US5483792A (en) * | 1993-05-05 | 1996-01-16 | General Electric Company | Turbine frame stiffening rails |
US5438756A (en) * | 1993-12-17 | 1995-08-08 | General Electric Company | Method for assembling a turbine frame assembly |
US6358001B1 (en) * | 2000-04-29 | 2002-03-19 | General Electric Company | Turbine frame assembly |
US6860716B2 (en) * | 2003-05-29 | 2005-03-01 | General Electric Company | Turbomachine frame structure |
FR2923529B1 (en) * | 2007-11-09 | 2014-05-16 | Snecma | CONNECTION OF RADIAL ARMS TO A CIRCULAR VIROLE BY ILLUMINATION OF REPORTED PARTS |
DE102008019156A1 (en) * | 2008-04-17 | 2009-10-22 | Mtu Aero Engines Gmbh | Strut for a turbine intermediate housing, turbine intermediate housing and method for producing a turbine intermediate housing |
-
2008
- 2008-04-17 DE DE102008019156A patent/DE102008019156A1/en not_active Withdrawn
-
2009
- 2009-04-17 WO PCT/DE2009/000527 patent/WO2009127203A1/en active Application Filing
- 2009-04-17 EP EP09733098.9A patent/EP2268902B1/en not_active Not-in-force
- 2009-04-17 US US12/937,988 patent/US8579583B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2009127203A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20110033290A1 (en) | 2011-02-10 |
WO2009127203A1 (en) | 2009-10-22 |
US8579583B2 (en) | 2013-11-12 |
EP2268902B1 (en) | 2013-07-10 |
DE102008019156A1 (en) | 2009-10-22 |
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