(19)
(11)EP 3 189 922 B1

(12)EUROPEAN PATENT SPECIFICATION

(45)Mention of the grant of the patent:
26.06.2019 Bulletin 2019/26

(21)Application number: 17150564.7

(22)Date of filing:  06.01.2017
(51)International Patent Classification (IPC): 
B23K 1/00(2006.01)
F16L 13/00(2006.01)
B23K 103/08(2006.01)
B23K 101/00(2006.01)
B23K 33/00(2006.01)
B23K 1/18(2006.01)
B23K 103/04(2006.01)
B23K 101/06(2006.01)

(54)

ADVANCED BRAZE JOINT FOR TUBE-TO-TUBE CONNECTION

ERWEITERTE LÖTVERBINDUNG FÜR ROHR-ZU-ROHR-VERBINDUNG

JOINT DE BRASURE AVANCÉE POUR CONNEXION DE TUBE À TUBE


(84)Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

(30)Priority: 11.01.2016 US 201614992646

(43)Date of publication of application:
12.07.2017 Bulletin 2017/28

(73)Proprietor: United Technologies Corporation
Farmington, CT 06032 (US)

(72)Inventors:
  • SLAVENS, Thomas N.
    Moodus, CT 06469 (US)
  • CLUM, Carey
    East Hartford, CT 06118 (US)

(74)Representative: Dehns 
St. Brides House 10 Salisbury Square
London EC4Y 8JD
London EC4Y 8JD (GB)


(56)References cited: : 
JP-A- H09 236 188
US-A1- 2014 219 778
  
      
    Note: Within nine months from the publication of the mention of the grant of the European patent, any person may give notice to the European Patent Office of opposition to the European patent granted. Notice of opposition shall be filed in a written reasoned statement. It shall not be deemed to have been filed until the opposition fee has been paid. (Art. 99(1) European Patent Convention).


    Description

    FIELD



    [0001] This disclosure relates generally to gas turbine engines, and more particularly to a female fitting of a tube-to-tube joint.

    BACKGROUND



    [0002] Tube-to-tube connections may be adjoined via various methods including via a brazing process. Generally, a braze filler material (filler metal) is applied between a first and a second tube to adjoin the two tubes. As the braze filler material is heated, the braze filler material may unavoidably enter into a flow cavity or surface of the tubes which may clog or otherwise affect the flow surface of the tubes.

    [0003] A prior art device having the features of the preamble to claim 1 is disclosed in JP H09 236 188.

    SUMMARY



    [0004] From one aspect, the present invention provides a device having an aperture for receiving a tube in accordance with claim 1.

    [0005] In various embodiments, at least a portion of at least one of the inlet portion, the braze filler collector portion, the necked portion, or the void comprise a cylindrical geometry. The braze filler collector portion may be located axially between the inlet portion and the necked portion.

    [0006] At least one of the inlet portion, the braze filler collector portion, the necked portion, or the collection pocket may define a junction surface, the junction surface configured to be coupled to the tube via the braze filler material. A length of the junction surface may be between 125% and 400% of the first diameter. The length of the junction surface may be between 150% and 200% of the first diameter. The third diameter may be between 75% and 98% of the first diameter. The third diameter may be between 80% and 90% of the first diameter.

    [0007] From another aspect, the present invention provides a vane platform assembly in accordance with claim 6.

    [0008] In various embodiments, the vane platform assembly may further comprise a second aperture in fluidic communication with the first aperture. The second aperture may comprise a pressure tap. The vane platform assembly may further comprise a tube, wherein the first aperture circumferentially surrounds at least a portion of the tube, the first aperture configured to receive the tube. The first aperture may be disposed in at least one of the OD platform or the ID platform. The second aperture may be disposed in at least one of the vane, the ID platform, or the OD platform.

    [0009] From yet another aspect, the present invention provides a tube-to-tube connection in accordance with claim 10.

    [0010] In various embodiments, the braze filler collector portion may be located axially between the inlet portion and the necked portion. The first tube may comprise an inside diameter (ID) surface comprising a diameter being equal to the fourth diameter. A gap between an outside diameter (OD) surface of the first tube and the necked portion may be configured to prevent a braze filler material from flowing within the gap. At least one of the inlet portion, the braze filler collector portion, the necked portion, or the collection pocket may define a junction surface, the junction surface circumferentially surrounding an end of the first tube, the junction surface coupled to the first tube via the braze filler material located between the junction surface and an outside diameter (OD) surface of the first tube.

    [0011] The foregoing features and elements may be combined in various combinations without exclusivity, unless expressly indicated otherwise. These features and elements as well as the operation thereof will become more apparent in light of the following description and the accompanying drawings. It should be understood, however, the following description and drawings are intended to be exemplary in nature and non-limiting.

    BRIEF DESCRIPTION OF THE DRAWINGS



    [0012] 

    Figure 1 illustrates an example gas turbine engine, in accordance with various embodiments;

    Figure 2 illustrates a perspective view of a vane platform assembly with pressure taps, in accordance with various embodiments;

    Figure 3A illustrates a cross-section view of a device having an aperture configured to receive a tube, in accordance with various embodiments; and

    Figure 3B illustrates a cross-section view of a tube-to-tube connection, in accordance with various embodiments.


    DETAILED DESCRIPTION



    [0013] The detailed description of exemplary embodiments herein makes reference to the accompanying drawings, which show exemplary embodiments by way of illustration. While these exemplary embodiments are described in sufficient detail to enable those skilled in the art to practice the disclosure, it should be understood that other embodiments may be realized and that logical changes and adaptations in design and construction may be made in accordance with this disclosure and the teachings herein. Thus, the detailed description herein is presented for purposes of illustration only and not of limitation. The scope of the disclosure is defined by the appended claims. For example, the steps recited in any of the method or process descriptions may be executed in any order and are not necessarily limited to the order presented. Furthermore, any reference to singular includes plural embodiments, and any reference to more than one component or step may include a singular embodiment or step. Also, any reference to attached, fixed, connected or the like may include permanent, removable, temporary, partial, full and/or any other possible attachment option. Additionally, any reference to without contact (or similar phrases) may also include reduced contact or minimal contact. Surface shading lines may be used throughout the figures to denote different parts but not necessarily to denote the same or different materials. In some cases, reference coordinates may be specific to each figure.

    [0014] As used herein, "aft" refers to the direction associated with the tail (e.g., the back end) of an aircraft, or generally, to the direction of exhaust of the gas turbine. As used herein, "forward" refers to the direction associated with the nose (e.g., the front end) of an aircraft, or generally, to the direction of flight or motion.

    [0015] As used herein, "distal" refers to the direction radially outward, or generally, away from the axis of rotation of a turbine engine. As used herein, "proximal" refers to a direction radially inward, or generally, towards the axis of rotation of a turbine engine.

    [0016] Brazing is a metal-joining process in which two or more metal devices are joined together by melting and flowing a braze filler material, the braze filler material having a lower melting point than the adjoining metal. A braze filler material may be applied between two or more metal devices and heat may be applied to the joint via a hand held torch. However, heat may be applied via any method. The joint is generally heated until the braze filler material melts, the two or more devices remaining in an un-melted state, whereinafter the braze filler material is left to cool, joining the two or more devices. The melting and resolidification of the braze filler material could also include chemical re-alloying of the paste giving it a higher melting temperature in the processed state. As described herein, a tube-to-tube connection may be adjoined via a brazing process. In various embodiments, a braze filler material may comprise a paste, a powder, or a solid material.

    [0017] In various embodiments and with reference to FIG. 1, a gas turbine engine 20 is provided. Gas turbine engine 20 may be a two-spool turbofan that generally incorporates a fan section 22, a compressor section 24, a combustor section 26 and a turbine section 28. Alternative engines may include, for example, an augmenter section among other systems or features. In operation, fan section 22 can drive air along a bypass flow-path B while compressor section 24 can drive air for compression and communication into combustor section 26 then expansion through turbine section 28. Although depicted as a turbofan gas turbine engine 20 herein, it should be understood that the concepts described herein are not limited to use with turbofans as the teachings may be applied to other types of gas turbine engines including three-spool architectures.

    [0018] Gas turbine engine 20 may generally comprise a low speed spool 30 and a high speed spool 32 mounted for rotation about an engine central longitudinal axis A-A' relative to an engine static structure 36 via one or more bearing systems 38 (shown as bearing system 38-1 and bearing system 38-2). It should be understood that various bearing systems 38 at various locations may alternatively or additionally be provided, including for example, bearing system 38, bearing system 38-1, and bearing system 38-2.

    [0019] Low speed spool 30 may generally comprise an inner shaft 40 that interconnects a fan 42, a low pressure (or first) compressor section 44 (also referred to a low pressure compressor) and a low pressure (or first) turbine section 46. Inner shaft 40 may be connected to fan 42 through a geared architecture 48 that can drive fan 42 at a lower speed than low speed spool 30. Geared architecture 48 may comprise a gear assembly 60 enclosed within a gear housing 62. Gear assembly 60 couples inner shaft 40 to a rotating fan structure. High speed spool 32 may comprise an outer shaft 50 that interconnects a high pressure compressor 52 (e.g., a second compressor section) and high pressure (or second) turbine section ("HPT") 54. A combustor 56 may be located between high pressure compressor 52 and HPT 54. A mid-turbine frame 57 of engine static structure 36 may be located generally between HPT 54 and low pressure turbine 46. Mid-turbine frame 57 may support one or more bearing systems 38 in turbine section 28. Inner shaft 40 and outer shaft 50 may be concentric and rotate via bearing systems 38 about the engine central longitudinal axis A-A', which is collinear with their longitudinal axes. As used herein, a "high pressure" compressor or turbine experiences a higher pressure than a corresponding "low pressure" compressor or turbine.

    [0020] The core airflow may be compressed by low pressure compressor 44 then high pressure compressor 52, mixed and burned with fuel in combustor 56, then expanded over HPT 54 and low pressure turbine 46. Mid-turbine frame 57 includes airfoils 59 which are in the core airflow path. Low pressure turbine 46 and HPT 54 rotationally drive the respective low speed spool 30 and high speed spool 32 in response to the expansion.

    [0021] Gas turbine engine 20 may be, for example, a high-bypass geared aircraft engine. In various embodiments, the bypass ratio of gas turbine engine 20 may be greater than about six (6). In various embodiments, the bypass ratio of gas turbine engine 20 may be greater than ten (10). In various embodiments, geared architecture 48 may be an epicyclic gear train, such as a star gear system (sun gear in meshing engagement with a plurality of star gears supported by a carrier and in meshing engagement with a ring gear) or other gear system. Geared architecture 48 may have a gear reduction ratio of greater than about 2.3 and low pressure turbine 46 may have a pressure ratio that is greater than about 5. In various embodiments, the bypass ratio of gas turbine engine 20 is greater than about ten (10:1). In various embodiments, the diameter of fan 42 may be significantly larger than that of the low pressure compressor 44, and the low pressure turbine 46 may have a pressure ratio that is greater than about (5:1). Low pressure turbine 46 pressure ratio may be measured prior to inlet of low pressure turbine 46 as related to the pressure at the outlet of low pressure turbine 46 prior to an exhaust nozzle. It should be understood, however, that the above parameters are exemplary of various embodiments of a suitable geared architecture engine and that the present disclosure contemplates other gas turbine engines including direct drive turbofans.

    [0022] With reference to FIG. 2, a vane platform assembly 200 is illustrated, in accordance with various embodiments. Vane platform assembly 200 may comprise a first platform (also referred to herein as outside diameter (OD) platform) 210, a second platform (also referred to herein as inside diameter (ID) platform) 212, and one or more vanes, such as first vane 220 and second vane 222, for example. First vane 220 and second vane 222 may be coupled between OD platform 210 and ID platform 212.

    [0023] In various embodiments, OD platform 210 may comprise one or more pressure taps such as first pressure tap 202, second pressure tap 204, and/or third pressure tap 206. First pressure tap 202 may comprise an aperture 232 disposed in inner flow surface 214 of ID platform 212. Second pressure tap 204 may comprise an aperture 234 disposed in second vane 222. Third pressure tap 206 may comprise an aperture 236 disposed in outer flow surface 216 of OD platform 210. Accordingly, first pressure tap 202 may comprise an inside diameter (ID) pressure tap, second pressure tap 204 may comprise an airfoil pressure tap, and third pressure tap 206 may comprise an outside diameter (OD) pressure tap. First pressure tap 202 may be configured to measure a fluid pressure located at aperture 232. Second pressure tap 204 may be configured to measure a fluid pressure located at aperture 234. Third pressure tap 206 may be configured to measure a fluid pressure located at aperture 236. In various embodiments, aperture 232, aperture 234, and/or aperture 236 may be referred to herein as a second aperture.

    [0024] In various embodiments, first pressure tap 202 may comprise a tube 242 extending from vane platform assembly 200. Tube 242 may be configured to be joined with a second tube by inserting the second tube into tube 242 and brazing the two tubes together. In this regard, second pressure tap 204 and third pressure tap 206 may be similar to first pressure tap 202. As described herein, in various embodiments, tube 242 may comprise a first aperture located at an inlet which is in fluidic communication with aperture 232.

    [0025] With reference to FIG. 3A, a device 300 having an aperture (also referred to herein as first aperture) 307 for receiving a tube is illustrated, in accordance with various embodiments. In various embodiments, device 300 may comprise a pressure tap such as first pressure tap 202 for example (see FIG. 2). Device 300 comprises an inlet 306, an inlet portion 316, a braze filler collector portion 314, and a necked portion 312. Device 300 also comprises a collection pocket 318 and a flow surface 310.

    [0026] Inlet portion 316 is located at or in close proximity to inlet 306. Inlet 306 is the opening or otherwise the location of insertion of a tube into aperture 307. Thus, aperture 307 includes inlet 306, inlet portion 316, braze filler collector portion 314, necked portion 312, and collection pocket 318. Inlet portion 316 comprises a first diameter 326. Braze filler collector portion 314 comprises a second diameter 324. Second diameter 324 is greater than first diameter 326. Braze filler collector portion 314 is located axially between inlet portion 316 and necked portion 312. Accordingly, braze filler collector portion 314 is located axially adjacent to inlet portion 316. Similarly, necked portion 312 is located axially adjacent to braze filler collector portion 314. Necked portion 312 comprises a third diameter 322. Third diameter 322 is less than first diameter 326. Third diameter 322 is less than second diameter 324. Flow surface 310 comprises a fourth diameter 320. Fourth diameter 320 is less than third diameter 322. Flow surface 310 may define a cylindrical void. Flow surface 310 may comprise a cylindrical geometry. Inlet portion 316 may comprise a cylindrical geometry. Braze filler collector portion 314 may comprise a cylindrical geometry. Necked portion 312 may comprise a cylindrical geometry.

    [0027] Collection pocket 318 is located axially adjacent to necked portion 312. Collection pocket 318 may be configured to collect a braze filler material from necked portion 312. Collection pocket 318 may prevent braze filler material from contacting or otherwise altering flow surface 310. In various embodiments, collection pocket 318 may comprise a flare as illustrated. However, it is contemplated that collection pocket 318 may comprise any suitable geometry such as a counter-sunk chamfer or a groove for example. However, collection pocket 318 may comprise any suitable geometry. Device 300 comprises a stopping surface 304. Stopping surface 304 is located in close proximity to collection pocket 318, the stopping surface 304 being substantially perpendicular to center axis 330 of flow surface 310. Stopping surface 304 is configured to contact a tube in response to the tube having been fully inserted into aperture 307.

    [0028] With respect to FIG. 3B, elements with like element numbering, as depicted in FIG. 3A, are intended to be the same and will not necessarily be repeated for the sake of clarity.

    [0029] With reference to FIG. 3B, a cross-section view of a tube-to-tube connection 301 is illustrated, in accordance with various embodiments. Tube-to-tube connection 301 comprises a first tube 340 and a second tube 342. Second tube 342 comprises device 300 as illustrated in FIG. 3A. First tube 340 is inserted into aperture 307 of second tube 342. In various embodiments, a braze filler material 348 may be applied to outside diameter (OD) surface 344 of first tube 340 before first tube 340 is inserted into aperture 307. In various embodiments, a braze filler material 348 may be applied to inlet portion 316 and braze filler
    collector portion 314 of second tube 342 before first tube 340 is inserted into aperture 307. First tube 340 may comprise an outside diameter 350. Outside diameter 350 may be less than third diameter 322 (see FIG. 3A). However, outside diameter 250 may be configured to be only slightly less than third diameter 322 to decrease the gap 352 between OD surface 344 and necked portion 312. Accordingly, necked portion 312 may be configured to prevent a braze filler material from moving from braze filler collector portion 314 and entering collection pocket 318. Stated another way, gap 352 may be configured to prevent the flow of a braze filler material within gap 352. In various embodiments, first tube 340 may comprise an inside diameter (ID) surface 354. ID surface 354 may comprise a diameter 356. In various embodiments, diameter 356 may be equal to fourth diameter 320 (see FIG. 3A).

    [0030] In various embodiments, at least one of inlet portion 316, braze filler collector portion 314, necked portion 312, and collection pocket 318 may define a junction surface 302. First tube 340 may be coupled to junction surface 302 via braze filler material 348. In this regard, first tube 340 may be adjoined to second tube 342 via a brazing process, wherein first tube 340 is adjoined to second tube 342 via braze filler material 348. In various embodiments, braze filler material 348 may comprise a metal filler, the metal filler comprising a melting point temperature which is less than the melting point temperature of first tube 340 and second tube 342.

    [0031] In various embodiments, first tube 340 may contact stopping surface 304 in response to first tube 340 being inserted completely into aperture 307. Stated another way, first tube 340 may contact stopping surface 304 when first tube 340 is in an installed position. Second tube 342 may circumferentially surround at least a portion of first tube 340 when first tube 340 is in an installed position.

    [0032] In various embodiments, junction surface 302 may comprise a length 360. With reference to FIG. 3A and FIG. 3B, length 360 may be between 125% and 400% of first diameter 326, in accordance with various embodiments. Third diameter 322 may be between 75% and 98% of first diameter 326, in accordance with various embodiments. Third diameter 322 may be between 80% and 90% of first diameter 326, in accordance with various embodiments.

    [0033] In various embodiments, first tube 340 and second tube 342 may comprise a high temperature metal (e.g., an austenitic nickel-chromium-based alloy such as that available under the trade name INCONEL), a high temperature composite, and/or the like. In various embodiments, first tube 340 and second tube 342 may comprise a high temperature stainless steel (e.g., type 330 stainless steel).

    [0034] Although described herein with respect to vane platform assemblies, devices, and tube-to-tube connections, as described herein, may be used with any other suitable connection such as secondary air system tube joints, internal heat exchanger assemblies, and fuel system connections (i.e., fuel ring connections, internal fuel nozzles, etc), for example.

    [0035] Benefits, other advantages, and solutions to problems have been described herein with regard to specific embodiments. Furthermore, the connecting lines shown in the various figures contained herein are intended to represent exemplary functional relationships and/or physical couplings between the various elements. It should be noted that many alternative or additional functional relationships or physical connections may be present in a practical system. However, the benefits, advantages, solutions to problems, and any elements that may cause any benefit, advantage, or solution to occur or become more pronounced are not to be construed as critical, required, or essential features or elements of the disclosure. The scope of the disclosure is accordingly to be limited by nothing other than the appended claims.


    Claims

    1. A device (300) having an aperture (307) for receiving a tube (340) comprising:

    an inlet portion (316) comprising a first diameter (326), the inlet portion (316) located at an inlet (306) of the aperture (307);

    a braze filler collector portion (314) located axially adjacent to the inlet portion (316) comprising a second diameter (324), characterised by the second diameter (324) being greater than the first diameter (326);

    a necked portion (312) located axially adjacent to the braze filler collector portion (314) comprising a third diameter (322), the third diameter (322) being less than the first diameter (326) and the second diameter (324);

    a flow surface (310) comprising a fourth diameter (320), the fourth diameter (320) being less than the third diameter (322), the flow surface (310) defining a void;

    a collection pocket (318) located adjacent to the necked portion (312), the collection pocket (318) configured to collect a braze filler material (348) from the necked portion (312) to prevent the braze filler material (348) from contacting the flow surface (310); and

    a stopping surface (304) located radially inward of and proximate the collection pocket (318), the stopping surface (304) being substantially perpendicular to a center axis (330) of the flow surface (310) and configured to contact the tube (340) in response to the tube (340) having been fully inserted into the aperture (307).


     
    2. The device of claim 1, wherein at least a portion of at least one of the inlet portion (316), the braze filler collector portion (314), the necked portion (312), or the void comprise a cylindrical geometry.
     
    3. The device of any preceding claim, wherein at least one of the inlet portion (316), the braze filler collector portion (314), the necked portion (312), or the collection pocket (318) define a junction surface, the junction surface configured to be coupled to the tube (340) via the braze filler material (348).
     
    4. The device of claim 3, wherein a length of the junction surface is between 125% and 400% of the first diameter (326), for example, between 150% and 200% of the first diameter (326).
     
    5. The device of any preceding claim, wherein the third diameter (322) is between 75% and 98% of the first diameter (326), for example, between 80% and 90% of the first diameter (326).
     
    6. A vane platform assembly (200) comprising:

    a vane (222) coupled between an inside diameter (ID) platform (212) and an outside diameter (OD) platform (210); and

    the device of any preceding claim, wherein the aperture (307) is a first aperture (307).


     
    7. The vane platform assembly of claim 6, further comprising a second aperture (232, 234, 236) in fluidic communication with the first aperture (307), wherein, optionally,
    the second aperture (232, 234, 236) comprises a pressure tap (202, 204, 206), and/or the second aperture is disposed in at least one of the vane (222), the ID platform (212), or the OD platform (210).
     
    8. The vane platform assembly of claim 6 or 7, further comprising a tube (340), wherein the first aperture (307) circumferentially surrounds at least a portion of the tube (340), the first aperture (307) configured to receive the tube (340).
     
    9. The vane platform assembly of claim 6, 7 or 8, wherein the first aperture (307) is disposed in at least one of the OD platform (210) or the ID platform (212).
     
    10. A tube-to-tube connection (301) comprising:

    a first tube (340); and

    a second tube (342) comprising the device (300) of any of claims 1 to 5.


     
    11. The tube-to-tube connection of claim 10, wherein the braze filler collector portion (314) is located between the inlet portion (316) and the necked portion (312).
     
    12. The tube-to-tube connection of claim 10 or 11, wherein the first tube (340) comprises an inside diameter (ID) surface (354) comprising a diameter (356) being equal to the fourth diameter (320).
     
    13. The tube-to-tube connection of claim 10, 11 or 12, wherein a gap (352) between an outside diameter (OD) surface (344) of the first tube (340) and the necked portion (314) is configured to prevent a braze filler material (348) from flowing within the gap (352).
     
    14. The tube-to-tube connection of any of claims 10 to 13, wherein at least one of the inlet portion (316), the braze filler collector portion (314), the necked portion (312), or the collection pocket (318) define a junction surface, the junction surface circumferentially surrounding an end of the first tube (340), the junction surface coupled to the first tube (340) via the braze filler material (348) located between the junction surface and an/the outside diameter (OD) surface (344) of the first tube (340).
     


    Ansprüche

    1. Vorrichtung (300) mit einer Öffnung (307) zum Aufnehmen eines Rohrs (340), umfassend:

    einen Einlassabschnitt (316), der einen ersten Durchmesser (326) umfasst, wobei sich der Einlassabschnitt (316) an einem Einlass (306) der Öffnung (307) befindet;

    einen Lötfüllerauffangabschnitt (314), der sich axial zu dem Einlassabschnitt (316) benachbart befindet, der einen zweiten Durchmesser (324) umfasst, dadurch gekennzeichnet, dass der zweite Durchmesser (324) größer als der erste Durchmesser (326) ist;

    einen verengten Abschnitt (312), der sich axial zu dem Lötfüllerauffangabschnitt (314) befindet, der einen dritten Durchmesser (322) umfasst, wobei der dritte Durchmesser (322) geringer als der erste Durchmesser (326) und der zweite Durchmesser (324) ist;

    eine Strömungsfläche (310), die einen vierten Durchmesser (320) umfasst, wobei der vierte Durchmesser (320) geringer als der dritte Durchmesser (322) ist, wobei die Strömungsfläche (310) einen Hohlraum definiert;

    ein Auffangfach (318), das sich zu dem verengten Abschnitt (312) benachbart befindet, wobei das Auffangfach (318) dazu konfiguriert ist, ein Lötfüllermaterial (348) aus dem verengten Abschnitt (312) aufzufangen, um zu verhindern, dass das Lötfüllermaterial (348) die Strömungsfläche (310) berührt; und

    eine Stoppfläche (304), die sich radial nach innen und in der Nähe des Auffangfachs (318) befindet, wobei die Stoppfläche (304) im Wesentlichen senkrecht zu der Mittelachse (330) der Strömungsfläche (310) ist und dazu konfiguriert ist, (340) als Reaktion darauf, dass das Rohr (340) vollständig in die Öffnung (307) eingeführt wurde, das Rohr zu berühren.


     
    2. Vorrichtung nach Anspruch 1, wobei zumindest ein Abschnitt von zumindest einem von dem Einlassabschnitt (316), dem Lötfüllerauffangabschnitt (314), dem verengten Abschnitt (312) oder dem Hohlraum eine zylinderförmige Geometrie umfasst.
     
    3. Vorrichtung nach einem der vorangehenden Ansprüche, wobei zumindest eines von dem Einlassabschnitt (316), dem Lötfüllerauffangabschnitt (314), dem verengten Abschnitt (312) oder dem Auffangfach (318) eine Verbindungsfläche definiert, wobei die Verbindungsfläche dazu konfiguriert ist, an das Rohr (340) über das Lötfüllermaterial (348) gekoppelt zu werden.
     
    4. Vorrichtung nach Anspruch 3, wobei eine Länge der Verbindungsfläche zwischen 125 % und 400 % des ersten Durchmessers (326) beträgt, zum Beispiel zwischen 150 % und 200 % des ersten Durchmessers (326).
     
    5. Vorrichtung nach einem der vorangehenden Ansprüche, wobei der dritte Durchmesser (322) zwischen 75 % und 98 % des ersten Durchmessers (326) beträgt, zum Beispiel zwischen 80 % und 90 % des ersten Durchmessers (326).
     
    6. Schaufelplattformbaugruppe (200), umfassend:

    eine Schaufel (222), die zwischen einer Innendurchmesser-(ID-)Plattform (212) und einer Außendurchmesser-(AD-)Plattform (210) gekoppelt ist; und

    Vorrichtung nach einem der vorangehenden Ansprüche, wobei die Öffnung (307) eine erste Öffnung (307) ist.


     
    7. Schaufelplattformbaugruppe nach Anspruch 6, ferner umfassend eine zweite Öffnung (232, 234, 236) in Fluidverbindung mit der ersten Öffnung (307), wobei optional die zweite Öffnung (232, 234, 236) einen Druckhahn (202, 204, 206) umfasst, und/oder die zweite Öffnung in zumindest einer von der Schaufel (222), der ID-Plattform (212) oder der AD-Plattform (210) angeordnet ist.
     
    8. Schaufelplattformbaugruppe nach Anspruch 6 oder 7, ferner umfassend ein Rohr (340), wobei die erste Öffnung (307) zumindest einen Abschnitt des Rohrs (340) umlaufend umgibt, wobei die erste Öffnung (307) dazu konfiguriert ist, das Rohr (340) aufzunehmen.
     
    9. Schaufelplattformbaugruppe nach Anspruch 6, 7 oder 8, wobei die erste Öffnung (307) in zumindest einer von der AD-Plattform (210) oder der ID-Plattform (212) angeordnet ist.
     
    10. Rohr-zu-Rohr-Verbindung (301), umfassend:

    ein erstes Rohr (340); und

    ein zweites Rohr (342), das die Vorrichtung (300) aus einem der Ansprüche 1 bis 5 umfasst.


     
    11. Rohr-zu-Rohr-Verbindung nach Anspruch 10, wobei sich der Lötfüllerauffangabschnitt (314) zwischen dem Einlassabschnitt (316) und dem verengten Abschnitt (312) befindet.
     
    12. Rohr-zu-Rohr-Verbindung nach Anspruch 10 oder 11, wobei das erste Rohr (340) eine Innendurchmesser-(ID-)Fläche (354) umfasst, die einen Durchmesser (356) umfasst, der gleich wie der vierte Durchmesser (320) ist.
     
    13. Rohr-zu-Rohr-Verbindung nach Anspruch 10, 11 oder 12, wobei eine Lücke (352) zwischen einer Außendurchmesser-(AD-)Fläche (344) des ersten Rohrs (340) und dem verengten Abschnitt (314) dazu konfiguriert ist, zu verhindern, dass ein Lötfüllermaterial (348) in die Lücke (352) fließt.
     
    14. Rohr-zu-Rohr-Verbindung nach einem der Ansprüche 10 bis 13, wobei zumindest eines von dem Einlassabschnitt (316), dem Lötfüllerauffangabschnitt (314), dem verengten Abschnitt (312) oder dem Auffangfach (318) eine Verbindungsfläche definieren, wobei die Verbindungsfläche ein Ende des ersten Rohrs (340) umlaufend umgibt, die Verbindungsfläche an das erste Rohr (340) über das Lötfüllermaterial (348), das sich zwischen der Verbindungsfläche und einer/der Außendurchmesser-(AD-)Fläche (344) des ersten Rohrs (340) befindet, gekoppelt ist.
     


    Revendications

    1. Dispositif (300) ayant une ouverture (307) pour recevoir un tube (340) comprenant :

    une portion d'admission (316) comprenant un premier diamètre (326), la portion d'admission (316) étant située au niveau d'une admission (306) de l'ouverture (307) ;

    une portion collectrice d'apport de brasage fort (314) située axialement adjacente à la portion d'admission (316) comprenant un deuxième diamètre (324), caractérisé en ce que le deuxième diamètre (324) est plus grand que le premier diamètre (326) ;

    une portion rétreinte (312) située axialement adjacente à la portion collectrice d'apport de brasage fort (314) comprenant un troisième diamètre (322), le troisième diamètre (322) étant plus petit que le premier diamètre (326) et le deuxième diamètre (324) ;

    une surface d'écoulement (310) comprenant un quatrième diamètre (320), le quatrième diamètre (320) étant plus petit que le troisième diamètre (322), la surface d'écoulement (310) définissant un vide ;

    une poche de collecte (318) située adjacente à la portion rétreinte (312), la poche de collecte (318) étant configurée pour collecter un matériau d'apport de brasage fort (348) depuis la portion rétreinte (312) pour empêcher le matériau d'apport de brasage fort (348) de venir au contact avec la surface d'écoulement (310) ; et

    une surface d'arrêt (304) située radialement vers l'intérieur et à proximité de la poche de collecte (318), la surface d'arrêt (304) étant sensiblement perpendiculaire à un axe central (330) de la surface d'écoulement (310) et configurée pour venir au contact avec le tube (340) en réaction à l'insertion totale du tube (340) dans l'ouverture (307).


     
    2. Dispositif selon la revendication 1, dans lequel au moins une portion d'au moins l'un de la portion d'admission (316), de la portion collectrice d'apport de brasage fort (314), de la portion rétreinte (312) ou du vide comprend une géométrie cylindrique.
     
    3. Dispositif selon une quelconque revendication précédente, dans lequel au moins l'une de la portion d'admission (316), de la portion collectrice d'apport de brasage fort (314), de la portion rétreinte (312) ou de la poche de collecte (318) définit une surface de jonction, la surface de jonction étant configurée pour être couplée au tube (340) via le matériau d'apport de brasage fort (348).
     
    4. Dispositif selon la revendication 3, dans lequel une longueur de la surface de jonction est entre 125 % et 400 % du premier diamètre (326), par exemple, entre 150 % et 200 % du premier diamètre (326).
     
    5. Dispositif selon une quelconque revendication précédente, dans lequel le troisième diamètre (322) est entre 75 % et 98 % du premier diamètre (326), par exemple, entre 80 % et 90 % du premier diamètre (326).
     
    6. Ensemble plateforme d'aube (200) comprenant :

    une aube (222) couplée entre une plateforme (212) de diamètre intérieur (ID) et une plateforme (210) de diamètre extérieur (OD) ; et

    le dispositif selon une quelconque revendication précédente, dans lequel l'ouverture (307) est une première ouverture (307).


     
    7. Ensemble plateforme d'aube selon la revendication 6, comprenant en outre une seconde ouverture (232, 234, 236) en communication fluidique avec la première ouverture (307), dans lequel, facultativement,
    la seconde ouverture (232, 234, 236) comprend une prise de pression (202, 204, 206), et/ou
    la seconde ouverture est disposée dans au moins l'une de l'aube (222) de la plateforme ID (212), ou de la plateforme OD (210).
     
    8. Ensemble plateforme d'aube selon la revendication 6 ou 7, comprenant en outre un tube (340), dans lequel la première ouverture (307) encercle circonférentiellement au moins une portion du tube (340), la première ouverture (307) étant configurée pour recevoir le tube (340).
     
    9. Ensemble plateforme d'aube selon la revendication 6, 7 ou 8, dans lequel la première ouverture (307) est disposée dans au moins l'une de la plateforme OD (210) ou de la plateforme ID (212).
     
    10. Connexion tube à tube (301) comprenant :

    un premier tube (340) ; et

    un second tube (342) comprenant le dispositif (300) selon l'une quelconque des revendications 1 à 5.


     
    11. Connexion tube à tube selon la revendication 10, dans laquelle la portion collectrice d'apport de brasage fort (314) est située entre la portion d'admission (316) et la portion rétreinte (312).
     
    12. Connexion tube à tube selon la revendication 10 ou 11, dans laquelle le premier tube (340) comprend une surface (354) de diamètre intérieur (ID) comprenant un diamètre (356) qui est égal au quatrième diamètre (320).
     
    13. Connexion tube à tube selon la revendication 10, 11 ou 12, dans laquelle un écartement (352) entre une surface (344) de diamètre extérieur (OD) du premier tube (340) et la portion rétreinte (314) est configuré pour empêcher un matériau d'apport de brasage fort (348) de s'écouler au sein de l'écartement (352).
     
    14. Connexion tube à tube selon l'une quelconque des revendications 10 à 13, dans laquelle au moins l'une de la portion d'admission (316), de la portion collectrice d'apport de brasage fort (314), de la portion rétreinte (312) ou de la poche de collecte (318) définit une surface de jonction, la surface de jonction encerclant circonférentiellement une extrémité du premier tube (340), la surface de jonction étant couplée au premier tube (340) via le matériau d'apport de brasage fort (348) situé entre la surface de jonction et une/la surface (344) de diamètre extérieur (OD) du premier tube (340).
     




    Drawing

















    Cited references

    REFERENCES CITED IN THE DESCRIPTION



    This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.

    Patent documents cited in the description