US20150059177A1 - Method for removing an end cap of a combustor cap assembly - Google Patents
Method for removing an end cap of a combustor cap assembly Download PDFInfo
- Publication number
- US20150059177A1 US20150059177A1 US14/010,638 US201314010638A US2015059177A1 US 20150059177 A1 US20150059177 A1 US 20150059177A1 US 201314010638 A US201314010638 A US 201314010638A US 2015059177 A1 US2015059177 A1 US 2015059177A1
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- Prior art keywords
- cap assembly
- push rod
- force
- push rods
- assembly
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
- F23R3/46—Combustion chambers comprising an annular arrangement of several essentially tubular flame tubes within a common annular casing or within individual casings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R3/00—Continuous combustion chambers using liquid or gaseous fuel
- F23R3/42—Continuous combustion chambers using liquid or gaseous fuel characterised by the arrangement or form of the flame tubes or combustion chambers
- F23R3/60—Support structures; Attaching or mounting means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23R—GENERATING COMBUSTION PRODUCTS OF HIGH PRESSURE OR HIGH VELOCITY, e.g. GAS-TURBINE COMBUSTION CHAMBERS
- F23R2900/00—Special features of, or arrangements for continuous combustion chambers; Combustion processes therefor
- F23R2900/00019—Repairing or maintaining combustion chamber liners or subparts
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- 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
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49346—Rocket or jet device making
Definitions
- the present invention generally involves a cap assembly of a gas turbine combustor. More specifically, the invention relates to a method for removing an end cap assembly from the cap assembly for repair or replacement.
- a combustion section includes an outer casing and a plurality of combustors that is arranged in an annular array around the outer casing.
- Each combustor includes an end cover that is coupled to the outer casing and one or more axially extending fuel nozzles that extend inward from the end cover within the outer casing.
- Each combustor may also include an annular cap assembly that extends radially, circumferentially and axially within the outer casing.
- the fuel nozzles extend at least partially through one or more fuel nozzle passages that are defined within the cap assembly.
- the cap assembly may provide radial support for the fuel nozzles and/or may provide for mitigation of combustion dynamics.
- a conventional cap assembly includes an outer barrel, an inner barrel assembly that is rigidly connected to the outer barrel, and an end cap assembly that is inserted into one end of the inner barrel assembly.
- the end cap assembly typically comprises an outer ring, a cap plate or effusion plate that extends radially and circumferentially around one end of the outer ring, and one or more axially extending fuel nozzle collars that each at least partially define the fuel nozzle passages of the cap assembly.
- a compression seal such as a spring or hula seal circumferentially surrounds the ring.
- the end cap assembly is pressed into the inner barrel assembly.
- the compression springs provide radial support to the end cap assembly and also may allow for thermal growth and/or relative movement between the inner barrel assembly and the end cap assembly during operation of the combustor.
- One or more mechanical fasteners such as rivets or bolts may extend between the inner barrel assembly and the ring of the end cap assembly to hold the end cap assembly in position.
- oxidation, thermal cycling and/or combustion dynamics may cause weakening and/or damage to the cap plate. As a result, the cap assembly must be removed from the combustor and the cap plate must be repaired or replaced.
- One embodiment of the present invention is a method for removing an end cap assembly from a combustor cap assembly.
- the method includes inserting a push rod through an opening in a back plate portion of the cap assembly, engaging one end of the push rod with a radial support feature of the end cap assembly and applying a force to the push rod.
- Another embodiment of the present invention is a method for removing an end cap assembly from a combustor cap assembly.
- the method comprises inserting a plurality of push rods through a plurality of corresponding openings defined in a back plate of the cap assembly, engaging one end of each push rod with a radial support feature of the end cap assembly, mounting the cap assembly within a press and applying a force to the push rods via the press.
- Another embodiment of the present invention includes a method for separating an end cap assembly from an inner barrel of a combustor cap assembly.
- the method comprises removing a plurality of mechanical fasteners that extend between the inner barrel and the end cap assembly, inserting a plurality of push rods through a corresponding plurality of openings defined within one or more retention plates of the cap assembly, engaging one end of each push rod with a radial support feature of the end cap assembly, positioning an outer barrel portion of the cap assembly atop one or more vertical supports and applying a force to the push rods.
- FIG. 1 illustrates a perspective view of an exemplary cap assembly as may be found in a conventional combustor of a turbo-machine such as a gas turbine;
- FIG. 2 illustrates an exploded perspective view of the cap assembly as shown in FIG. 1 ;
- FIG. 3 provides a perspective view of a backside of an end cap assembly according to one embodiment of the present invention
- FIG. 3 provides a perspective view of a backside of an end cap assembly of the cap assembly as shown in FIGS. 1 and 2 ;
- FIG. 4 provides an enlarged partial back side view of the cap assembly as shown in FIG. 1 , according to one embodiment of the present invention
- FIG. 5 provides an assembled perspective view of the back side of the cap assembly as shown in FIG. 2 , according to one embodiment of the present invention
- FIG. 6 provides a perspective cutaway view of the cap assembly as shown in FIG. 5 ;
- FIG. 7 provides a perspective cutaway view of the cap assembly as shown in FIG. 6 , according to one embodiment of the present invention.
- FIG. 8 provides a perspective cutaway view of the cap assembly as shown in FIG. 6 , according to one embodiment of the present invention.
- FIG. 9 provides a perspective view of the cap assembly as shown in FIG. 8 , according to one embodiment of the present invention.
- FIG. 10 provides a perspective view of a push rod connected to an alignment plate according to one embodiment of the present invention.
- FIG. 11 provides a perspective cutaway view of the cap assembly including the push rods and the alignment plate as shown in FIG. 10 , according one embodiment of the present invention
- FIG. 12 provides a perspective cutaway view of the cap assembly as shown in FIG. 1 , according to one embodiment of the present invention
- FIG. 13 provides a perspective view of a cap assembly mounted in an exemplary press, according to one embodiment of the present invention.
- FIG. 14 illustrates a method for loosening and/or removing the end cap assembly from the cap assembly according to an exemplary embodiment of the present subject matter
- FIG. 15 illustrates a method for loosening and/or removing the end cap assembly from the cap assembly according to an exemplary embodiment of the present subject matter
- FIG. 16 illustrates a method for loosening and/or removing the end cap assembly from the cap assembly according to an exemplary embodiment of the present subject matter.
- Certain gas turbine combustors include one or more axially extending fuel nozzles that extend downstream from an end cover.
- the fuel nozzles are cantilevered to the end cover at one end and extend at least partially through a cap assembly that is disposed within the combustor.
- the cap assembly extends radially, circumferentially and axially within the combustor.
- the cap assembly provides radial support to the cantilevered fuel nozzles and may also help control combustion dynamics within the combustor.
- An exemplary cap assembly may include multiple subassemblies including an outer barrel assembly, an inner barrel assembly and an end cap assembly which includes a cap plate. The end cap assembly is positioned generally adjacent to an outlet end of the fuel nozzles.
- FIG. 1 illustrates a perspective view of an exemplary cap assembly 10 as may be found in a conventional combustor of a turbo-machine such as a gas turbine
- FIG. 2 provides an exploded perspective view of the cap assembly 10 as shown in FIG. 1
- the cap assembly 10 generally includes an outer barrel 12 , an inner barrel assembly 14 that is rigidly connected to the outer barrel 12 via one or more struts 16 , and an end cap assembly 18 that is inserted into a forward end portion 20 of the inner barrel assembly 14 .
- the outer barrel 12 is typically coupled to an outer casing (not shown) that surrounds the combustor.
- FIG. 3 provides a perspective view of a backside of the end cap assembly 18 as shown in FIGS. 1 and 2 .
- the end cap assembly 18 generally includes an outer ring or band 22 .
- a cap plate or effusion plate 24 extends radially and circumferentially around one end of the outer band 22 .
- the cap plate 24 may at least partially define a plurality of cooling passages (not shown).
- the cap plate 24 at least partially defines one or more fuel nozzle passages 26 .
- the end cap assembly 18 may further include one or more fuel nozzle sleeves 28 .
- the fuel nozzle sleeves 28 are substantially coaxially aligned with the one or more fuel nozzle passages 26 .
- a compression seal 30 such as a spring or hula seal circumferentially surrounds the outer band 22 .
- the compression seal 30 provides radial support for the end cap assembly 18 during and/or after insertion into the end portion 20 of the inner barrel assembly 14 while allowing for relative movement and/or thermal growth between the end cap assembly 18 and the inner barrel assembly 14 during operation of the combustor.
- a plurality of radially extending retention holes 32 may be defined in the outer band 22 .
- the retention holes 32 may generally align with a plurality of complementary retention holes 34 ( FIG. 1 ) defined by an outer ring 36 of the inner barrel assembly 14 .
- a plurality of mechanical fasteners 38 such as rivets or bolts may be inserted through the retention holes 32 , 34 ( FIG. 1 ) so as to fix the end cap assembly 18 to the inner barrel assembly 14 .
- the end cap assembly 18 includes a radial support feature 40 .
- the radial support feature 40 includes an inner ring 42 and a plurality of support members or arms 44 that extend radially between the inner ring 42 and the outer band 22 .
- the support members 44 extend between the inner ring 42 and an outer ring 46 that is disposed along an inside wall of the outer band 22 .
- the support members 44 may be disposed between adjacent fuel nozzle sleeves 28 .
- the radial support feature 40 generally provides structural support to the end cap assembly 18 to prevent and/or reduce undesirable deformation of the end cap assembly 18 during operation of the combustor.
- the cap assembly 10 includes a back plate 48 and a plurality of fuel nozzle collars 50 that extend through the back plate 48 .
- the fuel nozzle collars 50 are substantially coaxially aligned with the fuel nozzle sleeves 28 of the end cap assembly 18 .
- one or more retention plates 52 may be bolted, welded or otherwise mechanically connected to the back plate 48 to hold the fuel nozzle collars 50 in position.
- the back plate 48 may hold the fuel nozzle collars 50 in position.
- one or more openings 54 may extend through each or some of the retention plates 52 and/or through the back plate 48 .
- the openings 54 may be provided prior to assembly of the cap assembly 10 .
- the openings 54 may be machined, cut or formed in each or some of the retention plates 52 and/or the back plate 48 post assembly of the cap assembly 10 so as to facilitate disassembly of the cap assembly 10 .
- FIG. 4 provides an enlarged partial view of the back side of the cap assembly 10 according to one embodiment
- FIG. 5 provides an assembled perspective view of the backside of the cap assembly 10 as shown in FIG. 2 , according to one embodiment of the present invention
- at least some of the openings 54 may include threads 55 .
- the threads 55 may be cut into the one or both of the retention plates 52 and/or the back plate 48 .
- the threads 55 may be provided by an insert (not shown) that is seated within the opening 54 .
- the threads 55 may be provided by a fastener such as a nut that has been affixed to the retention plates 52 and/or the back plate 48 .
- a plurality of mechanical fasteners or plugs 56 such as rivets or bolts may be used to seal the openings 54 during operation of the combustor.
- FIG. 6 provides a perspective cutaway view of the cap assembly 10 as shown in FIG. 5 with the openings 54 extending through the retaining plates 52 and the back plate 48 .
- the openings 54 are generally aligned with at least a portion of the radial support feature 40 .
- each of the openings 54 are aligned with a corresponding support member 44 .
- FIG. 6 also illustrates a portion of a system 100 for loosening and/or separating the end cap assembly 18 from the inner barrel assembly 14 and/or the cap assembly 10 , according to one embodiment of the present subject matter.
- the system 100 generally includes one or more push rods or pins 102 that extend through the openings 54 and engage with the radial support feature 40 of the end cap assembly 18 .
- one end of each push rod 102 is aligned with a corresponding support member 44 of the radial support feature 40 .
- the push rods 102 are of a sufficient length so as to engage with the radial support feature 40 while extending through the inner barrel assembly 14 and outward through the back plate 48 and/or the retention plates 52 a sufficient distance so as to provide clearance with respect to the fuel nozzle collars 50 .
- a substantially linear force F may be applied to each push rod 102 so as to loosen and/or remove the end cap assembly 18 from the inner barrel assembly 14 , as illustrated in FIG. 7 .
- the force F may be applied via a manual tool such as a mallet (not shown) or the like. Because the force F is directed into the support member 44 of the radial support feature 40 , damage to the cap plate 24 is avoided.
- the force F may be applied to a single push rod 102 which is interchanged between the various openings to loosen and/or remove the end cap assembly 18 from the inner barrel assembly 14 .
- a single push rod 102 may be inserted into one of the openings 54 and the force applied by a hammer or other tool. The push rod 102 may then be interchanged between the various openings 54 until the end cap assembly 18 is loose or removed from the cap assembly 10 .
- FIG. 8 provides a perspective cutaway view of the cap assembly 10 as shown in FIG. 6 , according to one embodiment of the present invention.
- the push rods 102 may include threads 103 .
- the threads 103 may be complementary to the threads 55 disposed at and/or in the openings 54 .
- the push rods 102 may be threaded into the openings 54 until the one end of each of the push rods 102 engages with a corresponding portion of the radial support feature 40 such as one or more of the support members 44 .
- the force F may be provided by applying torque T to turn the push rods 102 towards the end cap assembly 10 , thus loosening and/or removing the end cap assembly from the cap assembly.
- FIG. 10 provides a perspective view of the push rods 102 connected to an alignment plate 104 according to one embodiment of the present subject matter.
- the alignment plate 104 may assure proper alignment of each push rod 102 with a corresponding opening 54 and may improve overall repair time.
- the alignment plate 104 is illustrated as a singular circular component, it should be known that the alignment plate 104 may have any shape and may comprise of multiple plates coupled together.
- the alignment plate 104 may be triangular, square, rectangular, or oval shaped.
- the alignment plate 104 may be configured for coupling to a press.
- FIG. 11 provides a perspective cutaway view of the cap assembly 10 including the push rods 102 and the alignment plate 104 .
- a substantially linear force F may be applied to the alignment plate 104 so as to loosen and/or remove the end cap assembly 18 from the inner barrel assembly 14 .
- the alignment plate 104 also may provide a substantially even distribution of the force F and may improve the time required to separate the end cap assembly 18 from the cap assembly 10 .
- FIG. 12 provides a perspective cutaway view of the cap assembly 10 according to one embodiment of the present invention.
- the cap assembly 10 may be placed in an orientation such that the push rods 102 and/or the alignment plate 104 are in contact with a surface 106 such as a work bench, floor, repair fixture or the like.
- the force F may be applied to the push rods 102 by providing an opposing or opposite force OF to at least one of the outer barrel 12 and the inner barrel assembly 14 so as to loosen and/or remove the end cap assembly 18 from the inner barrel assembly 14 .
- FIG. 13 provides a perspective view of the cap assembly 10 including the push rods 102 and the alignment plate 104 mounted in an exemplary press 106 , according to one embodiment of the present subject matter.
- the system 100 may include a press 106 .
- the press 106 may be manually operated or automated.
- the press 106 may be a pneumatic, hydraulic, electric or any other type of press that is capable of providing the substantially liner force F to the push rods 102 and/or the alignment plate 104 .
- the system 100 may include one or more vertical supports 108 .
- the vertical supports 108 may be placed under the cap assembly 10 during removal of the end cap assembly 18 to provide clearance for the end cap assembly 10 to translate out of the inner barrel 18 assembly.
- the vertical supports 108 may be positioned in an annular array under the outer barrel 12 .
- FIG. 14 illustrates a method 200 for loosening and/or removing the end cap assembly 18 from the cap assembly 10 according to an exemplary embodiment of the present subject matter.
- the method 200 includes inserting at least one of the push rods 102 through a corresponding one of the openings 54 in the back plate portion 48 of the cap assembly 10 .
- Step 202 may further comprise boring the opening into the back plate 48 and/or the retention plate 52 prior to inserting the push rod 102 through the opening 54 .
- Step 202 also may include removing a mechanical fastener 56 from the opening 54 prior to inserting the push rod 102 .
- Step 202 also may include coupling the push rod 102 to the alignment plate 104 prior to or after inserting the push rod 102 through the opening 54 .
- Step 202 also may include threading the push rod 102 into the opening 54 .
- the method 200 includes engaging one end of the push rod 102 with the radial support feature 40 of the end cap assembly 18 .
- step 204 may include aligning and/or engaging the one end of the push rod 102 with one of the support members 44 such that the push rod 102 does not engage and/or otherwise interact with the cap plate 24 .
- the method 200 includes applying force F to the push rod 102 .
- the force F is generally sufficient to loosen and/or completely remove the end cap assembly 18 from the cap assembly 10 .
- the force F may be applied via the press 106 and/or via a manual tool such as a mallet or the like.
- the force F is transferred to through the push rod 102 to the radial support feature 40 , thereby preventing deformation and/or damage to the cap plate 24 during disassembly.
- the force F also may be applied by providing an opposing or opposite force OF to at least one of the inner barrel assembly 14 or the outer barrel 12 .
- the method 200 also includes removing the plurality of mechanical fasteners 38 that extend radially between the inner barrel 14 of the cap assembly 10 and the end cap assembly 18 prior to applying the force F to the push rod 102 .
- FIG. 15 illustrates a method 300 for loosening and/or removing the end cap assembly 18 from the cap assembly 10 according to another exemplary embodiment of the present subject matter.
- the method 300 includes inserting a plurality of the push rods 102 through a plurality of corresponding openings 54 defined in the back plate 48 of the cap assembly 10 .
- the openings 54 may be defined within the retention plates 52 .
- Step 302 may further comprise boring the openings into the back plate 48 prior to inserting the push rods 102 .
- step 302 may include removing a plurality of mechanical fasteners 56 from each or some of the openings 54 prior to inserting the push rods 102 .
- Step 302 also may include coupling the push rods 102 to the alignment plate 104 prior to or after inserting the push rods 102 through the openings 54 .
- the method 300 includes engaging one end of each push rod 102 with the radial support feature 40 of the end cap assembly 18 .
- step 304 may include aligning and/or engaging the one end of each of the push rods 102 with one of the support members 44 such that the push rods 102 do not engage and/or otherwise interact with the cap plate 24 .
- the method 300 includes mounting and/or positioning the cap assembly 10 within the press 106 .
- Step 306 also may include positioning the outer barrel 12 of the cap assembly 10 atop the vertical supports 108 .
- the method 300 includes applying the force F to the push rods 102 via the press.
- the force F may be provided by applying an opposing force via the press 106 to at least one of the outer barrel 12 or the inner barrel assembly 14 of the cap assembly 10 .
- Step 308 may further include removing the plurality of mechanical fasteners 38 that extend radially between an inner barrel assembly 14 and the end cap assembly 18 prior to applying the force F to the push rods 102 .
- the force F may be applied to the push rods via the alignment plate 104 .
- FIG. 16 illustrates a method 400 for loosening and/or removing the end cap assembly 18 from the inner barrel assembly 14 and/or the cap assembly 10 according to another exemplary embodiment of the present subject matter.
- the method 400 includes removing the plurality of mechanical fasteners 38 that extend between the inner barrel assembly 14 and the end cap assembly 18 .
- the mechanical fasteners 38 may be removed by cutting, prying or any other suitable method.
- Step 402 may further comprise boring the openings 54 into the retention plates 52 and/or the back plate 48 .
- Step 402 also may include removing the plurality of mechanical fasteners 56 from each or some of the openings 54 .
- the mechanical fasteners 56 may be removed by cutting, prying or any other suitable method.
- the method 400 includes inserting a plurality of the push rods 102 through a corresponding plurality of the openings 54 defined within one or more of the retention plates 52 and/or the back plate 48 of the cap assembly 10 .
- Step 404 also may include threading the push rods 102 into the openings 54 .
- Step 404 also may include coupling the push rods 102 to the alignment plate 104 prior to or after inserting the push rods 102 through the openings 54 .
- the method 400 includes engaging one end of each push rod 102 with the radial support feature 40 of the end cap assembly 10 .
- step 406 may include aligning and/or engaging the one end of each of the push rods 102 with one of the support members 44 such that the push rods 102 do not engage and/or otherwise interact with the cap plate 24 .
- the method 400 includes positioning the outer barrel 12 of the cap assembly 10 atop one or more of the vertical supports 108 to provide clearance for the end cap assembly 18 to translate out of the inner barrel assembly 14 .
- the method 400 includes applying a force F to the push rods.
- the force F is generally sufficient to loosen and/or completely remove the end cap assembly 18 from the cap assembly 10 .
- the force F may be applied via a manual tool such as a mallet or the like.
- the force F is applied to the push rods by applying torque to the push rods.
- the force F is transferred to through the push rod 102 to the radial support feature 40 , thereby preventing deformation and/or damage to the cap plate 24 during disassembly.
- method 400 may further include positioning the cap assembly 10 within the press 106 and applying the force F via the press 106 . Again, the force F is transferred to through the push rod 102 to the radial support feature 40 , thereby preventing deformation and/or damage to the cap plate 24 during disassembly.
Abstract
A method for removing an end cap assembly from a combustor cap assembly includes inserting a push rod through an opening in a back plate portion of the cap assembly. One end of the push rod is engaged with a radial support feature of the end cap assembly and a substantially linear force is applied to the push rod. The force is distributed to the radial support feature, thereby preventing damage to a cap plate portion of the end cap assembly.
Description
- The present invention generally involves a cap assembly of a gas turbine combustor. More specifically, the invention relates to a method for removing an end cap assembly from the cap assembly for repair or replacement.
- In particular gas turbine designs, a combustion section includes an outer casing and a plurality of combustors that is arranged in an annular array around the outer casing. Each combustor includes an end cover that is coupled to the outer casing and one or more axially extending fuel nozzles that extend inward from the end cover within the outer casing. Each combustor may also include an annular cap assembly that extends radially, circumferentially and axially within the outer casing. The fuel nozzles extend at least partially through one or more fuel nozzle passages that are defined within the cap assembly. The cap assembly may provide radial support for the fuel nozzles and/or may provide for mitigation of combustion dynamics.
- A conventional cap assembly includes an outer barrel, an inner barrel assembly that is rigidly connected to the outer barrel, and an end cap assembly that is inserted into one end of the inner barrel assembly. The end cap assembly typically comprises an outer ring, a cap plate or effusion plate that extends radially and circumferentially around one end of the outer ring, and one or more axially extending fuel nozzle collars that each at least partially define the fuel nozzle passages of the cap assembly. A compression seal such as a spring or hula seal circumferentially surrounds the ring.
- During assembly, the end cap assembly is pressed into the inner barrel assembly. The compression springs provide radial support to the end cap assembly and also may allow for thermal growth and/or relative movement between the inner barrel assembly and the end cap assembly during operation of the combustor. One or more mechanical fasteners such as rivets or bolts may extend between the inner barrel assembly and the ring of the end cap assembly to hold the end cap assembly in position. Over time, oxidation, thermal cycling and/or combustion dynamics may cause weakening and/or damage to the cap plate. As a result, the cap assembly must be removed from the combustor and the cap plate must be repaired or replaced.
- Current methods for removing the end cap assembly from the inner barrel require disassembly of a major portion of the cap assembly. This process is complex and time consuming In addition, known methods for removing the end cap assembly potentially result in damage such as deformation to or perforation of the cap plate, thus substantially increasing repair time and costs. Therefore, an improved method for removing the end cap assembly from the inner barrel which reduces repair time and decreases the potential for damage to the cap plate would be useful.
- Aspects and advantages of the invention are set forth below in the following description, or may be obvious from the description, or may be learned through practice of the invention.
- One embodiment of the present invention is a method for removing an end cap assembly from a combustor cap assembly. The method includes inserting a push rod through an opening in a back plate portion of the cap assembly, engaging one end of the push rod with a radial support feature of the end cap assembly and applying a force to the push rod.
- Another embodiment of the present invention is a method for removing an end cap assembly from a combustor cap assembly. The method comprises inserting a plurality of push rods through a plurality of corresponding openings defined in a back plate of the cap assembly, engaging one end of each push rod with a radial support feature of the end cap assembly, mounting the cap assembly within a press and applying a force to the push rods via the press.
- Another embodiment of the present invention includes a method for separating an end cap assembly from an inner barrel of a combustor cap assembly. The method comprises removing a plurality of mechanical fasteners that extend between the inner barrel and the end cap assembly, inserting a plurality of push rods through a corresponding plurality of openings defined within one or more retention plates of the cap assembly, engaging one end of each push rod with a radial support feature of the end cap assembly, positioning an outer barrel portion of the cap assembly atop one or more vertical supports and applying a force to the push rods.
- Those of ordinary skill in the art will better appreciate the features and aspects of such embodiments, and others, upon review of the specification.
- A full and enabling disclosure of the present invention, including the best mode thereof to one skilled in the art, is set forth more particularly in the remainder of the specification, including reference to the accompanying figures, in which:
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FIG. 1 illustrates a perspective view of an exemplary cap assembly as may be found in a conventional combustor of a turbo-machine such as a gas turbine; -
FIG. 2 illustrates an exploded perspective view of the cap assembly as shown inFIG. 1 ; -
FIG. 3 provides a perspective view of a backside of an end cap assembly according to one embodiment of the present invention; -
FIG. 3 provides a perspective view of a backside of an end cap assembly of the cap assembly as shown inFIGS. 1 and 2 ; -
FIG. 4 provides an enlarged partial back side view of the cap assembly as shown inFIG. 1 , according to one embodiment of the present invention; -
FIG. 5 provides an assembled perspective view of the back side of the cap assembly as shown inFIG. 2 , according to one embodiment of the present invention; -
FIG. 6 provides a perspective cutaway view of the cap assembly as shown inFIG. 5 ; -
FIG. 7 provides a perspective cutaway view of the cap assembly as shown inFIG. 6 , according to one embodiment of the present invention; -
FIG. 8 provides a perspective cutaway view of the cap assembly as shown inFIG. 6 , according to one embodiment of the present invention; -
FIG. 9 provides a perspective view of the cap assembly as shown inFIG. 8 , according to one embodiment of the present invention; -
FIG. 10 provides a perspective view of a push rod connected to an alignment plate according to one embodiment of the present invention; -
FIG. 11 provides a perspective cutaway view of the cap assembly including the push rods and the alignment plate as shown inFIG. 10 , according one embodiment of the present invention; -
FIG. 12 provides a perspective cutaway view of the cap assembly as shown inFIG. 1 , according to one embodiment of the present invention; -
FIG. 13 provides a perspective view of a cap assembly mounted in an exemplary press, according to one embodiment of the present invention; -
FIG. 14 illustrates a method for loosening and/or removing the end cap assembly from the cap assembly according to an exemplary embodiment of the present subject matter; -
FIG. 15 illustrates a method for loosening and/or removing the end cap assembly from the cap assembly according to an exemplary embodiment of the present subject matter; and -
FIG. 16 illustrates a method for loosening and/or removing the end cap assembly from the cap assembly according to an exemplary embodiment of the present subject matter. - Reference will now be made in detail to present embodiments of the invention, one or more examples of which are illustrated in the accompanying drawings. The detailed description uses numerical and letter designations to refer to features in the drawings. Like or similar designations in the drawings and description have been used to refer to like or similar parts of the invention. As used herein, the term “radially” refers to the relative direction that is substantially perpendicular to an axial centerline of a particular component, and the term “axially” refers to the relative direction that is substantially parallel to an axial centerline of a particular component.
- Each example is provided by way of explanation of the invention, not limitation of the invention. In fact, it will be apparent to those skilled in the art that modifications and variations can be made in the present invention without departing from the scope or spirit thereof. For instance, features or steps illustrated or described as part of one embodiment may be used on another embodiment or in another step to yield a still further embodiment. Thus, it is intended that the present invention covers such modifications and variations as come within the scope of the appended claims and their equivalents.
- Certain gas turbine combustors include one or more axially extending fuel nozzles that extend downstream from an end cover. The fuel nozzles are cantilevered to the end cover at one end and extend at least partially through a cap assembly that is disposed within the combustor. The cap assembly extends radially, circumferentially and axially within the combustor. Typically, the cap assembly provides radial support to the cantilevered fuel nozzles and may also help control combustion dynamics within the combustor. An exemplary cap assembly may include multiple subassemblies including an outer barrel assembly, an inner barrel assembly and an end cap assembly which includes a cap plate. The end cap assembly is positioned generally adjacent to an outlet end of the fuel nozzles.
- In operation, fuel is injected into the combustor from the outlet end of the fuel nozzle where it is mixed with air and burned proximate to the cap plate of the end cap assembly. As a result, the cap plate is exposed to high thermal stresses caused by the combustion flame. In addition, the cap plate may be exposed to large mechanical stresses typically caused by combustor dynamics. Consequently, the cap plate may develop cracks or other damage which requires repair or replacement of the component. In order to repair the cap plate, the end cap assembly must be removed from the cap assembly. However, various factors such as oxidation and/or material deformation create challenges to separating the end cap assembly from the cap assembly without damaging the cap plate. Therefore, an improved method for removing the end cap assembly from the cap assembly and/or the inner barrel assembly which avoids damage to the cap plate is provided herein.
- Referring now to the drawings, wherein like numerals refer to like components,
FIG. 1 illustrates a perspective view of anexemplary cap assembly 10 as may be found in a conventional combustor of a turbo-machine such as a gas turbine, andFIG. 2 provides an exploded perspective view of thecap assembly 10 as shown inFIG. 1 . As shown inFIGS. 1 and 2 , thecap assembly 10 generally includes anouter barrel 12, aninner barrel assembly 14 that is rigidly connected to theouter barrel 12 via one ormore struts 16, and anend cap assembly 18 that is inserted into aforward end portion 20 of theinner barrel assembly 14. Theouter barrel 12 is typically coupled to an outer casing (not shown) that surrounds the combustor. -
FIG. 3 provides a perspective view of a backside of theend cap assembly 18 as shown inFIGS. 1 and 2 . As shown inFIGS. 2 and 3 , theend cap assembly 18 generally includes an outer ring orband 22. As shown inFIGS. 1 and 2 , a cap plate oreffusion plate 24 extends radially and circumferentially around one end of theouter band 22. Thecap plate 24 may at least partially define a plurality of cooling passages (not shown). In particular designs, as shown inFIGS. 1 and 2 thecap plate 24 at least partially defines one or morefuel nozzle passages 26. As shown inFIGS. 1 , 2 and 3, theend cap assembly 18 may further include one or morefuel nozzle sleeves 28. As shown inFIGS. 1 and 2 , thefuel nozzle sleeves 28 are substantially coaxially aligned with the one or morefuel nozzle passages 26. - As shown in
FIG. 2 , acompression seal 30 such as a spring or hula seal circumferentially surrounds theouter band 22. Generally, thecompression seal 30 provides radial support for theend cap assembly 18 during and/or after insertion into theend portion 20 of theinner barrel assembly 14 while allowing for relative movement and/or thermal growth between theend cap assembly 18 and theinner barrel assembly 14 during operation of the combustor. - As shown in
FIG. 2 , a plurality of radially extending retention holes 32 may be defined in theouter band 22. The retention holes 32 may generally align with a plurality of complementary retention holes 34 (FIG. 1 ) defined by anouter ring 36 of theinner barrel assembly 14. As shown inFIGS. 1 and 2 , a plurality ofmechanical fasteners 38 such as rivets or bolts may be inserted through the retention holes 32, 34 (FIG. 1 ) so as to fix theend cap assembly 18 to theinner barrel assembly 14. - In particular embodiments, as shown in
FIG. 3 , theend cap assembly 18 includes aradial support feature 40. In one embodiment, theradial support feature 40 includes aninner ring 42 and a plurality of support members orarms 44 that extend radially between theinner ring 42 and theouter band 22. In particular configurations, thesupport members 44 extend between theinner ring 42 and anouter ring 46 that is disposed along an inside wall of theouter band 22. Thesupport members 44 may be disposed between adjacentfuel nozzle sleeves 28. Theradial support feature 40 generally provides structural support to theend cap assembly 18 to prevent and/or reduce undesirable deformation of theend cap assembly 18 during operation of the combustor. - Referring back to
FIG. 2 , thecap assembly 10 includes aback plate 48 and a plurality offuel nozzle collars 50 that extend through theback plate 48. Thefuel nozzle collars 50 are substantially coaxially aligned with thefuel nozzle sleeves 28 of theend cap assembly 18. In particular designs, one ormore retention plates 52 may be bolted, welded or otherwise mechanically connected to theback plate 48 to hold thefuel nozzle collars 50 in position. In other designs, theback plate 48 may hold thefuel nozzle collars 50 in position. - As shown in
FIG. 2 , one ormore openings 54 may extend through each or some of theretention plates 52 and/or through theback plate 48. Theopenings 54 may be provided prior to assembly of thecap assembly 10. In other embodiments, theopenings 54 may be machined, cut or formed in each or some of theretention plates 52 and/or theback plate 48 post assembly of thecap assembly 10 so as to facilitate disassembly of thecap assembly 10. -
FIG. 4 provides an enlarged partial view of the back side of thecap assembly 10 according to one embodiment, andFIG. 5 provides an assembled perspective view of the backside of thecap assembly 10 as shown inFIG. 2 , according to one embodiment of the present invention. As shown inFIG. 4 , at least some of theopenings 54 may includethreads 55. Thethreads 55 may be cut into the one or both of theretention plates 52 and/or theback plate 48. In other embodiments, thethreads 55 may be provided by an insert (not shown) that is seated within theopening 54. In other embodiments, thethreads 55 may be provided by a fastener such as a nut that has been affixed to theretention plates 52 and/or theback plate 48. In certain configurations, as shown inFIGS. 2 and 5 , a plurality of mechanical fasteners or plugs 56 such as rivets or bolts may be used to seal theopenings 54 during operation of the combustor. -
FIG. 6 provides a perspective cutaway view of thecap assembly 10 as shown inFIG. 5 with theopenings 54 extending through the retainingplates 52 and theback plate 48. As shown inFIG. 6 , theopenings 54 are generally aligned with at least a portion of theradial support feature 40. For example, in particular embodiments, each of theopenings 54 are aligned with acorresponding support member 44. -
FIG. 6 also illustrates a portion of asystem 100 for loosening and/or separating theend cap assembly 18 from theinner barrel assembly 14 and/or thecap assembly 10, according to one embodiment of the present subject matter. As shown inFIG. 6 , thesystem 100 generally includes one or more push rods or pins 102 that extend through theopenings 54 and engage with theradial support feature 40 of theend cap assembly 18. In one embodiment, one end of eachpush rod 102 is aligned with acorresponding support member 44 of theradial support feature 40. As shown, thepush rods 102 are of a sufficient length so as to engage with theradial support feature 40 while extending through theinner barrel assembly 14 and outward through theback plate 48 and/or the retention plates 52 a sufficient distance so as to provide clearance with respect to thefuel nozzle collars 50. - In particular embodiments, as shown in
FIG. 6 , a substantially linear force F may be applied to eachpush rod 102 so as to loosen and/or remove theend cap assembly 18 from theinner barrel assembly 14, as illustrated inFIG. 7 . In particular embodiments, the force F may be applied via a manual tool such as a mallet (not shown) or the like. Because the force F is directed into thesupport member 44 of theradial support feature 40, damage to thecap plate 24 is avoided. In one embodiment, the force F may be applied to asingle push rod 102 which is interchanged between the various openings to loosen and/or remove theend cap assembly 18 from theinner barrel assembly 14. For example, asingle push rod 102 may be inserted into one of theopenings 54 and the force applied by a hammer or other tool. Thepush rod 102 may then be interchanged between thevarious openings 54 until theend cap assembly 18 is loose or removed from thecap assembly 10. -
FIG. 8 provides a perspective cutaway view of thecap assembly 10 as shown inFIG. 6 , according to one embodiment of the present invention. As shown inFIG. 8 , at least some of thepush rods 102 may includethreads 103. Thethreads 103 may be complementary to thethreads 55 disposed at and/or in theopenings 54. In this manner, thepush rods 102 may be threaded into theopenings 54 until the one end of each of thepush rods 102 engages with a corresponding portion of theradial support feature 40 such as one or more of thesupport members 44. In this embodiment, as shown inFIG. 9 , the force F may be provided by applying torque T to turn thepush rods 102 towards theend cap assembly 10, thus loosening and/or removing the end cap assembly from the cap assembly. -
FIG. 10 provides a perspective view of thepush rods 102 connected to analignment plate 104 according to one embodiment of the present subject matter. Thealignment plate 104 may assure proper alignment of eachpush rod 102 with acorresponding opening 54 and may improve overall repair time. Although thealignment plate 104 is illustrated as a singular circular component, it should be known that thealignment plate 104 may have any shape and may comprise of multiple plates coupled together. For example, thealignment plate 104 may be triangular, square, rectangular, or oval shaped. In particular embodiments, thealignment plate 104 may be configured for coupling to a press. -
FIG. 11 provides a perspective cutaway view of thecap assembly 10 including thepush rods 102 and thealignment plate 104. As shown, a substantially linear force F may be applied to thealignment plate 104 so as to loosen and/or remove theend cap assembly 18 from theinner barrel assembly 14. Thealignment plate 104 also may provide a substantially even distribution of the force F and may improve the time required to separate theend cap assembly 18 from thecap assembly 10. -
FIG. 12 provides a perspective cutaway view of thecap assembly 10 according to one embodiment of the present invention. Once thepush rods 102 have been inserted into theopenings 54, thecap assembly 10 may be placed in an orientation such that thepush rods 102 and/or thealignment plate 104 are in contact with asurface 106 such as a work bench, floor, repair fixture or the like. In this manner, the force F may be applied to thepush rods 102 by providing an opposing or opposite force OF to at least one of theouter barrel 12 and theinner barrel assembly 14 so as to loosen and/or remove theend cap assembly 18 from theinner barrel assembly 14. -
FIG. 13 provides a perspective view of thecap assembly 10 including thepush rods 102 and thealignment plate 104 mounted in anexemplary press 106, according to one embodiment of the present subject matter. As shown inFIG. 13 , thesystem 100 may include apress 106. Thepress 106 may be manually operated or automated. Thepress 106 may be a pneumatic, hydraulic, electric or any other type of press that is capable of providing the substantially liner force F to thepush rods 102 and/or thealignment plate 104. - As shown in
FIG. 13 , thesystem 100 may include one or morevertical supports 108. Thevertical supports 108 may be placed under thecap assembly 10 during removal of theend cap assembly 18 to provide clearance for theend cap assembly 10 to translate out of theinner barrel 18 assembly. For example, thevertical supports 108 may be positioned in an annular array under theouter barrel 12. - The
system 100 shown and described herein with respect toFIGS. 6 , 7, 8, 9, 10, 11, 12 and 13 provides a method for loosening and/or removing theend cap assembly 18 from thecap assembly 10 as illustrated inFIGS. 1 , 2, 3, 4 and 5. For example,FIG. 14 illustrates amethod 200 for loosening and/or removing theend cap assembly 18 from thecap assembly 10 according to an exemplary embodiment of the present subject matter. - At
step 202, themethod 200 includes inserting at least one of thepush rods 102 through a corresponding one of theopenings 54 in theback plate portion 48 of thecap assembly 10. Step 202 may further comprise boring the opening into theback plate 48 and/or theretention plate 52 prior to inserting thepush rod 102 through theopening 54. Step 202 also may include removing amechanical fastener 56 from theopening 54 prior to inserting thepush rod 102. Step 202 also may include coupling thepush rod 102 to thealignment plate 104 prior to or after inserting thepush rod 102 through theopening 54. Step 202 also may include threading thepush rod 102 into theopening 54. - At
step 204, themethod 200 includes engaging one end of thepush rod 102 with theradial support feature 40 of theend cap assembly 18. For example, step 204 may include aligning and/or engaging the one end of thepush rod 102 with one of thesupport members 44 such that thepush rod 102 does not engage and/or otherwise interact with thecap plate 24. - At
step 206, themethod 200 includes applying force F to thepush rod 102. The force F is generally sufficient to loosen and/or completely remove theend cap assembly 18 from thecap assembly 10. In particular embodiments, the force F may be applied via thepress 106 and/or via a manual tool such as a mallet or the like. The force F is transferred to through thepush rod 102 to theradial support feature 40, thereby preventing deformation and/or damage to thecap plate 24 during disassembly. The force F also may be applied by providing an opposing or opposite force OF to at least one of theinner barrel assembly 14 or theouter barrel 12. In particular embodiments, themethod 200 also includes removing the plurality ofmechanical fasteners 38 that extend radially between theinner barrel 14 of thecap assembly 10 and theend cap assembly 18 prior to applying the force F to thepush rod 102. -
FIG. 15 illustrates amethod 300 for loosening and/or removing theend cap assembly 18 from thecap assembly 10 according to another exemplary embodiment of the present subject matter. As shown atstep 302, themethod 300 includes inserting a plurality of thepush rods 102 through a plurality of correspondingopenings 54 defined in theback plate 48 of thecap assembly 10. In addition or in the alternative, theopenings 54 may be defined within theretention plates 52. Step 302 may further comprise boring the openings into theback plate 48 prior to inserting thepush rods 102. In addition,step 302 may include removing a plurality ofmechanical fasteners 56 from each or some of theopenings 54 prior to inserting thepush rods 102. Step 302 also may include coupling thepush rods 102 to thealignment plate 104 prior to or after inserting thepush rods 102 through theopenings 54. - At
step 304, themethod 300 includes engaging one end of eachpush rod 102 with theradial support feature 40 of theend cap assembly 18. For example, step 304 may include aligning and/or engaging the one end of each of thepush rods 102 with one of thesupport members 44 such that thepush rods 102 do not engage and/or otherwise interact with thecap plate 24. - At
step 306, themethod 300 includes mounting and/or positioning thecap assembly 10 within thepress 106. Step 306 also may include positioning theouter barrel 12 of thecap assembly 10 atop the vertical supports 108. - At
step 308, themethod 300 includes applying the force F to thepush rods 102 via the press. The force F may be provided by applying an opposing force via thepress 106 to at least one of theouter barrel 12 or theinner barrel assembly 14 of thecap assembly 10. Step 308 may further include removing the plurality ofmechanical fasteners 38 that extend radially between aninner barrel assembly 14 and theend cap assembly 18 prior to applying the force F to thepush rods 102. The force F may be applied to the push rods via thealignment plate 104. -
FIG. 16 illustrates amethod 400 for loosening and/or removing theend cap assembly 18 from theinner barrel assembly 14 and/or thecap assembly 10 according to another exemplary embodiment of the present subject matter. As shown atstep 402, themethod 400 includes removing the plurality ofmechanical fasteners 38 that extend between theinner barrel assembly 14 and theend cap assembly 18. Themechanical fasteners 38 may be removed by cutting, prying or any other suitable method. Step 402 may further comprise boring theopenings 54 into theretention plates 52 and/or theback plate 48. Step 402 also may include removing the plurality ofmechanical fasteners 56 from each or some of theopenings 54. Themechanical fasteners 56 may be removed by cutting, prying or any other suitable method. - At
step 404, themethod 400 includes inserting a plurality of thepush rods 102 through a corresponding plurality of theopenings 54 defined within one or more of theretention plates 52 and/or theback plate 48 of thecap assembly 10. Step 404 also may include threading thepush rods 102 into theopenings 54. Step 404 also may include coupling thepush rods 102 to thealignment plate 104 prior to or after inserting thepush rods 102 through theopenings 54. - At
step 406, themethod 400 includes engaging one end of eachpush rod 102 with theradial support feature 40 of theend cap assembly 10. For example, step 406 may include aligning and/or engaging the one end of each of thepush rods 102 with one of thesupport members 44 such that thepush rods 102 do not engage and/or otherwise interact with thecap plate 24. - At
step 408, themethod 400 includes positioning theouter barrel 12 of thecap assembly 10 atop one or more of thevertical supports 108 to provide clearance for theend cap assembly 18 to translate out of theinner barrel assembly 14. - At
step 410, themethod 400 includes applying a force F to the push rods. The force F is generally sufficient to loosen and/or completely remove theend cap assembly 18 from thecap assembly 10. In particular embodiments, the force F may be applied via a manual tool such as a mallet or the like. In particular embodiments, the force F is applied to the push rods by applying torque to the push rods. The force F is transferred to through thepush rod 102 to theradial support feature 40, thereby preventing deformation and/or damage to thecap plate 24 during disassembly. - In addition,
method 400 may further include positioning thecap assembly 10 within thepress 106 and applying the force F via thepress 106. Again, the force F is transferred to through thepush rod 102 to theradial support feature 40, thereby preventing deformation and/or damage to thecap plate 24 during disassembly. - This written description uses examples to disclose the invention, including the best mode, and also to enable any person skilled in the art to practice the invention, including making and using any devices or systems and performing any incorporated methods. The patentable scope of the invention is defined by the claims, and may include other examples that occur to those skilled in the art. Such other examples are intended to be within the scope of the claims if they include structural elements that do not differ from the literal language of the claims, or if they include equivalent structural elements with insubstantial differences from the literal language of the claims.
Claims (20)
1. A method for removing an end cap assembly from a combustor cap assembly, comprising:
a. inserting a push rod through an opening in a back plate portion of the cap assembly;
b. engaging one end of the push rod with a radial support feature of the end cap assembly; and
c. applying a force to the push rod.
2. The method as in claim 1 , wherein the push rod is threaded, the method further comprising threading the push rod into the opening until the one end of the push rod engages with the radial support feature.
3. The method as in claim 2 , wherein the step of applying a force to the push rod further comprises applying torque to the push rod.
4. The method as in claim 1 , wherein the step of applying a force to the push rod includes providing an opposing force to at least one of an outer barrel assembly or an inner barrel assembly of the cap assembly.
5. The method as in claim 1 , further comprising removing a mechanical fastener from the opening prior to inserting the push rod through the opening.
6. The method as in claim 1 , further comprising removing a plurality of mechanical fasteners that extend radially between an inner barrel of the cap assembly and the end cap assembly prior to applying the force to the push rod.
7. The method as in claim 1 , further comprising coupling the push rod to an alignment plate.
8. A method for removing an end cap assembly from a combustor cap assembly, comprising:
a. inserting a plurality of push rods through a plurality of corresponding openings defined in a back plate of the cap assembly;
b. engaging one end of each push rod with a radial support feature of the end cap assembly;
c. mounting the cap assembly within a press; and
d. applying a force to the push rods via the press.
9. The method as in claim 8 , further comprising boring the openings into the back plate prior to inserting the plurality of push rods through the plurality of openings.
10. The method as in claim 8 , further comprising removing a fastener from each of the openings prior to inserting the plurality of push rods through the openings.
11. The method as in claim 8 , wherein the step of applying a force to the push rods includes providing an opposing force via the press to at least one of an outer barrel assembly or an inner barrel assembly of the cap assembly.
12. The method as in claim 8 , further comprising positioning an outer barrel of the cap assembly on a vertical support.
13. The method as in claim 8 , further comprising coupling the push rods to an alignment plate, wherein the force is applied to the push rods via the alignment plate.
14. A method for separating an end cap assembly from an inner barrel of a combustor cap assembly, comprising:
a. removing a plurality of mechanical fasteners that extend between the inner barrel and the end cap assembly;
b. inserting a plurality of push rods through a corresponding plurality of openings defined within one or more retention plates of the cap assembly;
c. engaging one end of each push rod with a radial support feature of the end cap assembly;
d. positioning an outer barrel portion of the cap assembly atop one or more vertical supports; and
e. applying a force to the push rods.
15. The method as in claim 14 , wherein the push rods are threaded, the method further comprising threading the push rods into the openings until the one end of each push rod engages with the radial support feature.
16. The method as in claim 15 , wherein the step of applying a force to the push rods further comprises applying torque to the push rods.
17. The method as in claim 14 , further comprising coupling the push rod to an alignment plate.
18. The method as in claim 17 , wherein the force is applied to the push rods via the alignment plate.
19. The method as in claim 14 , further comprising positioning the cap assembly within a press, wherein the force is applied to the push rods via the press.
20. The method as in claim 14 , wherein the force is applied to the push rods via a manual tool.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US14/010,638 US20150059177A1 (en) | 2013-08-27 | 2013-08-27 | Method for removing an end cap of a combustor cap assembly |
EP14181178.6A EP2843313A1 (en) | 2013-08-27 | 2014-08-15 | A method for removing an end cap of a combustor cap assembly |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US14/010,638 US20150059177A1 (en) | 2013-08-27 | 2013-08-27 | Method for removing an end cap of a combustor cap assembly |
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US20150059177A1 true US20150059177A1 (en) | 2015-03-05 |
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US14/010,638 Abandoned US20150059177A1 (en) | 2013-08-27 | 2013-08-27 | Method for removing an end cap of a combustor cap assembly |
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US (1) | US20150059177A1 (en) |
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Cited By (1)
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CN111894527A (en) * | 2020-08-17 | 2020-11-06 | 中国石油化工股份有限公司 | Gas production device of high-content gas well |
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CN111894527A (en) * | 2020-08-17 | 2020-11-06 | 中国石油化工股份有限公司 | Gas production device of high-content gas well |
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