• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A support structure (42) for a burner tube in a combustor cap assembly for a gas turbine combustor includes: an outer annulus (44); an inner annular hub (46); and a plurality of struts (48) extending radially between the outer annulus (44) and the inner hub (46). The inner hub (46) is provided with a piston ring groove (54) and a piston ring adapted to receive and seal an inner end of the burner tube.
    公开号:CH708653B1
    申请号:CH00137/15
    申请日:2013-08-01
    公开日:2017-10-31
    发明作者:Michelle Pangle Ansley；Bernard Wilson Matthew；Michael Poschel William
    申请人:Gen Electric；
    IPC主号:
    专利说明:

    Description Background of the Invention This invention relates to the field of gas turbine combustion technology, and more particularly to a simplified construction for a support structure for a combustor tube and combustor cap assembly.
    In certain annular-tube combustor earth-based electric power plant gas turbine combustor cup assemblies are provided at the front or upstream end of the combustion chamber assembly, which serve to support fuel nozzles which protrude into the combustion chamber. Usually, the combustor cap assemblies support multiple fuel nozzles at two locations including the forward ends at the nozzles and the rear ends of the nozzles and / or the burner tubes surrounding the nozzles. In some constructions, only one central fuel nozzle is surrounded by a burner tube, whereas in other constructions all of the combustion chamber nozzles are surrounded by corresponding burner tubes.
    [0003] In certain known arrangements of the combustor cap assembly, at the aft end where the cap assembly (ie, the combustor nearest end) abuts the rear ends of the fuel nozzles and / or the burner tubes is a diffusion plate formed with a plurality of openings Each of which is surrounded by a piston ring sleeve, which receives the rear end of the burner tube telescopically. Usually, the piston ring sleeve is butt-welded to the diffusion plate as a component of the cap assembly, and the burner tube is received over the piston sleeve with a sealing tire radially therebetween. A support structure having inner and outer rings connected by a plurality of spokes or struts is disposed adjacent to the diffusion plate around the end piston ferrule and welded in place. The burner tube sleeve is welded to a support plate at the opposite or upstream end of the cap assembly by means of a fillet weld.
    The conventional construction is complicated and requires several parts, which makes assembly, repairs, and the like difficult. Therefore, there remains a need for a simplified combustor cap assembly design that requires fewer parts and simplifies assembly or disassembly, but without sacrificing structural integrity.
    Brief Description of the Invention In accordance with one aspect of the invention, for a combustor tube in a combustor cap assembly for a gas turbine combustor, a support structure is provided, including: an outer annulus; an inner annular hub and a plurality of struts extending radially between the outer annulus and the inner hub, the inner hub being provided with a piston ring groove and a piston ring configured to receive and seal an inner end of the burner tube.
    In another aspect, there is provided a combustor cap assembly which includes: such support structural cap assembly at its front and rear ends to support a plurality of fuel nozzles and surrounding burner tubes including a central nozzle and a central burner tube, the support structure at the rear end a diffusion plate having a central opening formed in part by a sleeve facing the front end.
    The invention will now be described in detail in conjunction with the drawings below.
    Brief Description of the Drawings [0008]
    Fig. 1 shows a cross section through a combustion chamber cap assembly according to a known construction;
    Fig. 2 shows a nozzle burner tube support structure detached from the cap assembly of Fig. 1;
    Fig. 3 shows a partial cutaway view of the support structure shown in Fig. 2;
    Fig. 4 shows a nozzle burner support structure according to an exemplary, but not limiting
    Embodiment of the invention;
    Fig. 5 shows a section of a nozzle burner tube support structure according to the invention and illustrates additional supports for surrounding nozzles;
    Fig. 6 is a partial cross-sectional view of a combustor cap assembly employing the nozzle burner tube support structure of Fig. 4; and
    Fig. 7 is a view similar to Fig. 6, but additionally illustrating a central nozzle installed in the nozzle burner tube.
    Detailed Description of the Invention Figure 1 illustrates a prior art combustor cap assembly 10 which serves to support a plurality of fuel nozzles (not shown) in an arrangement in which five outer nozzles surround a central nozzle. In this particular example, all of the nozzles are provided with surrounding or outer burner tubes supported on a rear end of the combustor cap assembly. In Fig. 1, two outer nozzle burner tubes 12 and 14 are shown together with a central burner tube 16. In particular, the invention relates to the support for the central burner tube 16 at the inner or rear end 18 of the cap assembly 10. Accordingly, in the description of the known arrangement shown in Fig. 1 in particular the central burner tube 16 and its interaction with the inner or rear end 18 of the combustor cap assembly described.
    At their inner or front ends (the combustion chamber facing or adjacent ends), the different burner tubes are supported by sleeves 20 which are welded to a diffuser plate 22. The central sleeve 20 (also referred to herein as the "piston sleeve") is also (as best seen in FIGS. 2 and 3) laterally supported by a "carriage wheel" construction 24 formed by an outer ring 26 and an inner ring or collar a hub 28 is formed which is connected to a plurality of (in the illustrated example, five) radially extending spokes or struts 30. It is understood that the five surrounding nozzles / burner tubes are arranged in this arrangement in each case in the space which is defined by a pair of adjacent struts 30.
    With continued reference to Figs. 2 and 3, the inner hub 28 fits over the piston sleeve 20, and the central burner tube 16 is telescoped over the piston sleeve so that the inner end 32 of the burner tube 16 in the immediate vicinity of the outer edge 34 of the inner hub 28 is located with an axial gap therebetween. It should also be noted that there is a similar axial gap between the inner edge 36 of the inner hub 28 and the flanged base 38 of the piston sleeve 20. These gaps allow thermal expansion during operation. In this known arrangement, radially between the inner end of the burner tube 16 and the piston sleeve 20, an annular conventional spring or "seal tire" 40 is arranged to minimize air leakage over the diffusion plate.
    Figures 4 and 5 illustrate a simplified arrangement which serves to support the inner end of a central burner tube 66 to the fuel nozzle assembly (see Figure 7) according to an exemplary, but non-limiting embodiment of the invention. An inner carriage wheel structure 42 of a central combustor is based on an outer annulus 44 and an inner ring or hub 46 having a plurality of radially extending spokes 48 therebetween. In this case, however, the inner hub 46 is designed to engage a separate piston sleeve and hub Sealing tire can be dispensed with. In addition, the central burner tube 66 is supported at the forward end of the nozzle assembly (FIG. 7) and sealed only to the carriage wheel structure 42. In particular, the inner hub 46 has tapered leading and trailing ends 50, 52 and an inner periphery formed axially between the ends 50, 52 with an annular piston ring groove 54. As best seen in FIGS. 5 and 6, a downwardly extending annular bead portion 53 of the rear tapered end 52 may be butt-welded to a complementary skirt 56 in the diffusion plate 58. The forwardly tapered end 50 facilitates telescoping the center fuel nozzle tube 66 into the inner hub 46, and a piston ring 60 inserted into the groove 54 seals the space between the fuel nozzle tube 66 and the inner hub 46.
    Fig. 5 also shows surrounding burner tube support sleeves 61 of a different arrangement than shown in Fig. 1, but in no way is intended to limit the burner tube support structure described above.
    Figs. 6 and 7 show the carriage wheel support structure 42 installed in a combustor cap assembly 62, and Fig. 7 shows the same cap assembly 62 with a central nozzle 64 installed in and extending into the fuel nozzle combustor tube 66.
    The rear end of the fuel nozzle burner tube is sealed to the piston ring 60, but otherwise not attached where the burner tube is engaged by the diffusion plate 58, in other ways. This arrangement allows the fuel nozzle burner tube to thermally expand at least in the axial direction with respect to the inner hub 46 and the diffusion plate while maintaining the seal on the piston ring 60.
    This arrangement provides effective support for the inner end of the central burner tube using a smaller number of parts and with a simple construction without compromising structural integrity. While the invention is described herein in connection with a central burner tube nozzle, it can be used in any nozzle burner tube and even waiving the "carriage wheel" support structure. That a support resembling the inner ring or hub 46 could be welded to the diffusion plate at any location where a nozzle burner tube is to be supported.
    While the invention has been described in terms of a preferred embodiment which is presently believed to be best practiced, it should be understood that the invention is not to be construed as limited to the embodiment disclosed, but rather is intended to cover various modifications and equivalent arrangements. which fall within the scope of the appended claims.
    权利要求:
    Claims (10)
    [1]
    claims
    A support structure (42) for a burner tube (66) in a combustor cap assembly (62) for a gas turbine combustor, comprising: an outer annulus (44); an inner annular hub (46); and a plurality of struts (48) extending radially between the outer annulus (44) and the inner hub (46); wherein the inner hub (46) is provided with a piston ring groove (54) and a piston ring (60) adapted to receive and seal an inner end of the burner tube (66).
    [2]
    A support structure (42) according to claim 1, wherein the inner hub (46) is formed at its opposite front and rear ends (50, 52) with reverse tapered portions.
    [3]
    The support structure (42) of claim 2, further comprising a diffusion plate (58), the diffusion plate (58) having a circular opening defined by a tapered edge projecting from the diffusion plate (58), and wherein the rear end (52) of the inner hub (46) is welded to the tapered edge (53) projecting from the diffusion plate (58) on the diffusion plate (58).
    [4]
    The support structure (42) of claim 1, wherein the number of struts (48) is five, and wherein the burner tube (66) is receivable as a central nozzle burner tube in the support structure (42).
    [5]
    The support structure (42) of claim 3, wherein the circular opening in the diffusion plate (58) is formed in a central portion of the diffusion plate (58), wherein a plurality of openings surround the circular opening.
    [6]
    The support structure (42) of claim 5, wherein each of the plurality of openings is formed with a ring support projecting from the diffusion plate (58) configured to receive a burner tube (66), each ring holder projecting from the diffusion plate (58) an inner piston ring groove (54) into which a piston ring (60) is inserted which is adapted to engage the burner tube (66).
    [7]
    A combustor cap assembly (62) including: a support structure (42) according to any one of claims 1 to 6 at the front and rear ends (50, 52) of the combustor cap assembly (62) for communicating a plurality of fuel nozzles (64) and surrounding burner tubes (62). 66) including a central nozzle (64) and a central burner tube (66); wherein the support structure (42) at the aft end (52) includes a diffusion plate (58) having a central opening formed in part by a sleeve facing the forward end (50).
    [8]
    8. combustion cap assembly (62) according to claim 7, wherein inner ends of the burner tubes (66) are accommodated in the support structure (42) unobstructed, thereby allowing a thermal expansion in the axial direction.
    [9]
    The combustor cap assembly (62) of claim 7, wherein a rear end (52) of the central burner tube (66) is allowed to thermally expand with respect to the inner hub (46) and the sleeve of the diffusion plate (58).
    [10]
    The combustor cap assembly (62) of claim 7, wherein the rear ends (52) of each of the burner tubes (66) are allowed to thermally expand relative to the sleeve of the diffusion plate (58).
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    同族专利:
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    WO2014022627A1|2014-02-06|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE69306025T2|1992-03-30|1997-05-28|Gen Electric|Construction of a combustion chamber dome|
    US5274991A|1992-03-30|1994-01-04|General Electric Company|Dry low NOx multi-nozzle combustion liner cap assembly|
    US6438959B1|2000-12-28|2002-08-27|General Electric Company|Combustion cap with integral air diffuser and related method|
    US6910336B2|2003-02-18|2005-06-28|Power Systems Mfg. Llc|Combustion liner cap assembly attachment and sealing system|
    US20060230763A1|2005-04-13|2006-10-19|General Electric Company|Combustor and cap assemblies for combustors in a gas turbine|
    US7647779B2|2005-04-27|2010-01-19|United Technologies Corporation|Compliant metal support for ceramic combustor liner in a gas turbine engine|
    US7827797B2|2006-09-05|2010-11-09|General Electric Company|Injection assembly for a combustor|
    US8438853B2|2008-01-29|2013-05-14|Alstom Technology Ltd.|Combustor end cap assembly|
    US8087228B2|2008-09-11|2012-01-03|General Electric Company|Segmented combustor cap|
    US8490400B2|2008-09-15|2013-07-23|Siemens Energy, Inc.|Combustor assembly comprising a combustor device, a transition duct and a flow conditioner|
    US8171737B2|2009-01-16|2012-05-08|General Electric Company|Combustor assembly and cap for a turbine engine|
    US8528336B2|2009-03-30|2013-09-10|General Electric Company|Fuel nozzle spring support for shifting a natural frequency|US9423136B2|2013-12-13|2016-08-23|General Electric Company|Bundled tube fuel injector aft plate retention|
    CN106325372A|2015-06-30|2017-01-11|联想有限公司|Electronic equipment and mode switching method|
    US10429073B2|2015-12-21|2019-10-01|General Electric Company|Combustor cap module and retention system therefor|
    KR102363311B1|2017-10-30|2022-02-14|두산중공업 주식회사|Combustor and gas turbine comprising the same|
    KR20190048053A|2017-10-30|2019-05-09|두산중공업 주식회사|Combustor and gas turbine comprising the same|
    TWI646034B|2018-06-19|2019-01-01|竑偉科技有限公司|Conveying and stacking equipment for plate objects|
    法律状态:
    2017-03-15| NV| New agent|Representative=s name: GENERAL ELECTRIC TECHNOLOGY GMBH GLOBAL PATENT, CH |
    2021-03-31| PL| Patent ceased|
    优先权:
    申请号 | 申请日 | 专利标题
    US13/566,286|US9003803B2|2012-08-03|2012-08-03|Combustor cap assembly|
    PCT/US2013/053146|WO2014022627A1|2012-08-03|2013-08-01|Combustor cap assembly|
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