CN113751913B - Assembly and welding tool and assembly method for gas turbine exhaust diffuser - Google Patents

Assembly and welding tool and assembly method for gas turbine exhaust diffuser Download PDF

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Publication number
CN113751913B
CN113751913B CN202111153894.4A CN202111153894A CN113751913B CN 113751913 B CN113751913 B CN 113751913B CN 202111153894 A CN202111153894 A CN 202111153894A CN 113751913 B CN113751913 B CN 113751913B
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ring
diffuser
assembling
mounting
placing ring
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CN113751913A (en
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袁波
代春森
胡婷婷
李映
黄为林
薛小丽
张真武
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Yichang Marine Diesel Engine Co ltd
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Yichang Marine Diesel Engine Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
    • B23K31/02—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups relating to soldering or welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/047—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work moving work to adjust its position between soldering, welding or cutting steps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
    • B23K37/04—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work
    • B23K37/053—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups for holding or positioning work aligning cylindrical work; Clamping devices therefor

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)

Abstract

The invention provides an assembly and welding tool for an exhaust diffuser of a gas turbine and an assembly method thereof, wherein the tool comprises a base device and a walking platform bracket, the base device comprises an inner cylinder placing ring and an outer cylinder placing ring, the inner cylinder placing ring and the outer cylinder placing ring are connected through a connecting frame, a plurality of positioning partition plates are arranged between the inner cylinder placing ring and the outer cylinder placing ring, a plurality of positioning mechanisms for positioning a flow guide ring are arranged on the positioning partition plates along the inclined surfaces of the positioning partition plates, the outer cylinder placing ring is connected with an installation seat through a connecting mechanism, and the lower end of the walking platform bracket is connected with the installation seat. The assembly tool and the assembly method for the diffuser can control the size of a diffuser product in the manufacturing process and improve the assembly and welding efficiency.

Description

Assembly and welding tool and assembly method for gas turbine exhaust diffuser
Technical Field
The invention relates to the field of assembly of gas turbine exhaust diffusers, in particular to an assembly and welding tool and an assembly method of a gas turbine exhaust diffuser.
Background
The gas turbine exhaust diffuser is located at the end of the gas turbine, connected with the exhaust adapter by bolts, and supported by the exhaust adapter. The gas which has done work enters the exhaust connecting pipe and then enters the exhaust diffuser. The exhaust diffuser is a thin-wall radial structural member, as shown in fig. 1, the exhaust diffuser generally comprises parts such as an inner cylinder, an outer cylinder, a guide ring, a support tube, a reinforcing rib, an inner front flange and an outer front flange, wherein most parts are formed by separately forming 2-4 separate parts and then welding the separate parts together, errors are easily accumulated when the formed parts are welded together when the formed parts have errors, and the parts are integrally welded together subsequently, if no corresponding welding tool is used for controlling the size of the diffuser in the whole welding process, the product finally hardly meets the requirements of drawings.
Diffusers are generally divided into a monolithic and two-piece type: the integral diffuser has no half split surface, and the inner and outer cylinders, the guide ring, the inner and outer front flanges and other parts of the diffuser are circumferential integral parts, so that the processes of splicing the parts, integrally installing and welding the parts and the like can be completed by the aid of the tool designed by the scheme. The half-half diffuser assembly mode can be divided into a half-half insertion type and an external expansion type, and the one-time welding process of the half-half huff insertion type exhaust diffuser body is consistent with that of the integral diffuser.
Compared with an integral structure, the two half-half Hafu inserted diffuser is limited to the two half-half structure, in the assembling and welding process, the assembling size is difficult to guarantee, and the product is not rigid enough after being divided into halves, so that the product is greatly deformed during welding.
Disclosure of Invention
The invention aims to solve the technical problem of providing an assembly and welding tool and an assembly method of a gas turbine exhaust diffuser, which are suitable for integral and two-half huff-insertion diffusers, are convenient to control the size of a diffuser product in the manufacturing process and improve the assembly and welding efficiency.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: the utility model provides a gas turbine exhaust diffuser's assembly and welding frock, includes base device and walking platform support, and base device includes that the inner tube is placed the ring and the ring is placed to the urceolus, and the inner tube is placed the ring and is placed the ring with the urceolus and pass through the link connection, and the inner tube is placed the ring and the urceolus is placed and is equipped with a plurality of location baffles between the ring, is equipped with a plurality of positioning mechanism that go on fixing a position the water conservancy diversion ring along its inclined plane on the location baffle, and the urceolus is placed the ring and is passed through coupling mechanism and mount pad and be connected, walks platform support lower extreme and mount pad and be connected.
In the preferred scheme, the walking board support comprises a supporting platform, the supporting platform is connected with a mounting ring through a vertical support, and the mounting ring is connected with a mounting seat through a bolt.
In a preferred scheme, the positioning mechanism is a plurality of positioning clamping grooves.
In a preferred scheme, a plurality of pressing plate mechanisms are arranged on the inner cylinder placing ring and/or the outer cylinder placing ring, each pressing plate mechanism comprises a pressing plate, and the pressing plates are connected with the inner cylinder placing ring or the outer cylinder placing ring through bolts.
In a preferred scheme, the pressure plate is of an L-shaped structure, and the free end of the pressure plate abuts against the inner wall of the inner front flange or the outer wall of the outer front flange.
In the preferred scheme, a plurality of press mounting plates for press mounting of the walking platform of the diffuser are arranged on the walking platform support, one end of each press mounting plate is pressed on the walking platform, and the other end of each press mounting plate is connected with the walking platform support through a bolt.
In the preferred scheme, the walking platform is provided with a pressure ring, and the pressure ring is arranged between the walking platform and the press mounting plate.
The invention also provides an assembly method of the gas turbine exhaust diffuser, which comprises the following steps:
step one, independently manufacturing each part of the exhaust diffuser;
step two, respectively placing an inner front flange and an outer front flange of the diffuser on the inner cylinder placing ring and the outer cylinder placing ring, and after adjusting the concentricity of the inner front flange and the outer front flange, pressing the inner front flange and the outer front flange on the inner cylinder placing ring and the outer cylinder placing ring through a pressing plate mechanism;
thirdly, mounting an inner cylinder and an outer cylinder according to the positions of the inner front flange and the outer front flange, then mounting the flow guide rings on a positioning mechanism on the positioning partition plate in a layered manner, mounting reinforcing ribs and supporting pipes after the sizes are determined to be correct, checking the overall size again, and fixing all main body parts in a spot welding manner;
step four, folding the walking board bracket and the base device, connecting the mounting seat with the walking board bracket through a bolt after checking the concentricity of the walking board bracket and the base device, press-fitting the walking board through a press-fitting plate and a press ring, assembling the keel and the rest main body components, checking the size of the assembled keel and the rest main body components, and fixing the assembled keel and the rest main body components by spot welding;
and step five, placing the integral cylindrical structure formed by assembling the tool and the main body part of the diffuser on a roller carrier for spin welding, and removing the main body of the diffuser from the tool after welding.
In the preferred scheme, the method further comprises a sixth step of scribing and cutting the diffuser from the half after welding is finished, horizontally placing the machined half on an assembly platform, connecting one half of the cut diffuser with one half of the half, erecting the assembly part after connection, assembling and connecting the two halves through tool bolts, assembling and connecting the remaining half of the diffuser with the other half of the half, spot-welding the diffuser after folding, and then integrally welding; the tool screw pin comprises a pin rod section and a screw rod section, the pin rod section is inserted into the connecting holes of the two half a half of a half a.
In a preferred scheme, in the second step, a tooling support pipe is arranged between the inner front flange and the outer front flange.
According to the assembling and welding tool and the assembling method of the gas turbine exhaust diffuser, in the design of the tool, each size of a product is strictly controlled from the assembling size of a single component to the assembling error between the components and then to the welding deformation of the whole diffuser, and the appearance forming of the product is more consistent while the convenience of size positioning and welding is provided so as to improve the welding efficiency, so that the product has higher quality. The welding fixture has the advantages that the welding fixture not only improves the welding efficiency of products, reduces the production cost of the products, but also greatly improves the forming quality of the whole product, and particularly has obvious economic benefits for a large-batch production process, and one fixture serves a plurality of sets of products.
The technical scheme that the assembly position of the half flange is cut by integrally welding and scribing and halving firstly, and the assembly platform is used as a theoretical half surface and the half is fixed by the half by utilizing the characteristic that the integral radial structure of the diffuser is not changed in the assembly and welding process is adopted, so that the problems of insufficient product rigidity and large welding deformation in the structural form are solved.
Drawings
The invention is further illustrated with reference to the accompanying drawings and examples:
FIG. 1 is a view showing a main body structure of a diffuser;
FIG. 2 is a schematic view of the tooling and diffuser body assembled;
FIG. 3 is a schematic view of a base apparatus;
FIG. 4 is a schematic view of the base unit;
FIG. 5 is a schematic view of the platen installation;
FIG. 6 is a schematic view of the guide ring and the positioning partition plate;
FIG. 7 is a schematic view of the position of the staging support and diffuser;
FIG. 8 is a schematic view of the mounting of the walking board stand;
FIG. 9 is a schematic view of the installation of the press-fitting plate;
FIG. 10 is a schematic view of a tooling pin;
in the figure: walk a support 1, the ring 2 is placed to the inner tube, the ring 3 is placed to the urceolus, link 4, location baffle 5, positioning mechanism 6, coupling mechanism 7, mount pad 8, clamp plate 9, pressure equipment board 10, clamping ring 11, water conservancy diversion ring 12, walk a 13, interior preceding flange 14, outer preceding flange 15, inner tube 16, urceolus 17, strengthening rib 18, stay tube 19, fossil fragments 20, frock stay tube 21, frock plug screw 22, supporting platform 101, vertical support 102, collar 103, pin pole section 2201, screw pole section 2202.
Detailed Description
As shown in fig. 2 to 9, a gas turbine exhaust diffuser assembly and welding tool comprises a base device and a walking platform support 1, wherein the base device comprises an inner barrel placing ring 2 and an outer barrel placing ring 3, the inner barrel placing ring 2 and the outer barrel placing ring 3 are connected through a connecting frame 4, a plurality of positioning partition plates 5 are arranged between the inner barrel placing ring 2 and the outer barrel placing ring 3, in the embodiment, the number of the positioning partition plates 5 is four, a plurality of positioning mechanisms 6 for positioning a flow guide ring 12 are arranged on the positioning partition plates 5 along inclined planes of the positioning partition plates, in the embodiment, the positioning mechanisms 6 are a plurality of positioning clamp grooves, the flow guide ring 12 is arranged in the positioning clamp grooves in a layered mode, the outer barrel placing ring 3 is connected with a mounting seat 8 through a connecting mechanism 7, and the lower end of the walking platform support 1 is connected with the mounting seat 8.
The walking platform support 1 comprises a supporting platform 101, a mounting hole for assembling the guide ring 12 and the inner cylinder 16 is formed in the center of the supporting platform 101, the supporting platform 101 is connected with a mounting ring 103 through a vertical support 102, and the mounting ring 103 is connected with the mounting base 8 through a bolt.
The supporting platform 101 can be provided with a central supporting ring and an outer connecting ring, and the supporting ring and the connecting ring are connected through a frame body, so that the overall weight of the supporting platform 101 is reduced.
Preferably, a plurality of pressing plate mechanisms are arranged on the inner cylinder placing ring 2 and/or the outer cylinder placing ring 3, each pressing plate mechanism comprises a pressing plate 9, and the pressing plates 9 are connected with the inner cylinder placing ring 2 or the outer cylinder placing ring 3 through bolts.
The inner front flange 14 and the outer front flange 15 are pressed and limited by arranging the pressing plate 9, and the inner front flange 14 or the outer front flange 15 is prevented from moving to influence the size of a product.
In this embodiment, as shown in fig. 5, the pressure plate 9 may be configured in an "L" shape, the free end of the pressure plate 9 abuts against the inner wall of the inner front flange 14 or the outer wall of the outer front flange 15, so that the free end of the pressure plate 9 is pressed on the inner edge of the inner front flange 14 or the outer edge of the outer front flange 15, and the length of the free end of the pressure plate 9 is set to abut against the inner wall of the inner front flange 14 or the outer wall of the outer front flange 15, so as to position the inner front flange 14 and the outer front flange 15.
Preferably, as shown in fig. 9, a plurality of press-fitting plates 10 for press-fitting the diffusion device walking board 13 are arranged on the walking board support 1, one end of each press-fitting plate 10 is press-fitted on the walking board 13, and the other end of each press-fitting plate 10 is connected with the walking board support 1 through a bolt.
Through setting up pressure equipment board 10, improve the spacing fixed of walking on stage 13.
Further, a pressing ring 11 is arranged on the walking platform 13, and the pressing ring 11 is arranged between the walking platform 13 and the press mounting plate 10.
By arranging the compression ring 11, the stress uniformity of the walking platform 13 is improved.
For a monolithic diffuser, the particular assembly welding process includes the steps of:
independently manufacturing each part of an exhaust diffuser, wherein the manufacturing of an inner cylinder, an outer cylinder, a guide ring, an inner front flange, an outer front flange and a half flange is included;
and secondly, respectively placing an inner front flange 14 and an outer front flange 15 of the diffuser on the inner cylinder placing ring 2 and the outer cylinder placing ring 3, adjusting the concentricity of the inner front flange 14 and the outer front flange 15, pressing the inner front flange 14 and the outer front flange 15 on the inner cylinder placing ring 2 and the outer cylinder placing ring 3 through a pressing plate mechanism, and simultaneously installing a tooling support pipe 21 between the inner front flange 14 and the outer front flange 15, as shown in fig. 3, so as to ensure the size of a subsequent product after tooling.
And step three, installing an inner cylinder 16 and an outer cylinder 17 according to the positions of the inner front flange 14 and the outer front flange 15, then installing the flow guide rings 12 on the positioning mechanism 6 on the positioning partition plate 5 in a layering manner, installing the reinforcing ribs 18 and the support pipe 19 after the sizes are determined to be correct, checking the overall size again, and fixing all main components in a spot welding manner.
And step four, folding the walking board support 1 and the base device, connecting the mounting seat 8 and the walking board support 1 through bolts after checking the concentricity of the walking board support 1 and the base device, wherein the concentricity generally needs to be guaranteed within 3mm, press-fitting the walking board 13 through the press-fitting plate 10 and the pressing ring 11 to control welding deformation, and after assembling the keel 20 and the rest main body components, checking the size of the walking board, and fixing the walking board by spot welding.
And step five, placing an integral cylindrical structure formed by assembling the tool and the main body part of the diffuser on a roller carrier for spin welding, adjusting the welding positions of most welding seams of the diffuser into horizontal welding and transverse welding by vertical welding, overhead welding, climbing welding and the like, reducing the welding difficulty, and achieving better welding quality and higher efficiency. After welding on the roller frame is finished, the main body part of the diffuser can be taken off from the tool, and a thermal insulation layer is assembled or other residual processes are carried out.
For the two half-huff plug-in type diffuser, after welding is finished, the diffuser is scribed and cut from the huff, the processed huff is horizontally placed on an assembly platform, the cut half diffuser and the half huff are welded and connected, the assembly part is erected after connection, the two half huffs are assembled and connected through a tool screw pin 22, the remaining half diffuser and the other half huff are welded and assembled and connected, and after the diffuser is folded, spot welding is carried out, and then the diffuser is integrally welded.
As shown in fig. 10, the tooling bolt 22 includes a bolt section 2201 and a screw section 2202, the bolt section 2201 is inserted into the connecting holes of the two half-half-half and the screw section 2202 is fastened by a nut. The length of pin shank segment 2201 is less than the overall thickness of the two half-half.
Two half-half positioning is carried out through the pin rod section 2201, the misalignment is prevented, and the fastening is realized through the matching of the nut and the screw rod section 2202.
The installing and welding tool can be manufactured according to the design scheme of the tool by measuring various types of diffusers with the same structure and different sizes so as to meet the actual requirement of production. This frock can the integral diffuser of adaptation and the bayonet huff diffuser of two halves, it is not suitable to increase the huff diffuser outward, can be suitable for various models, diffuser such as 6B including the GE company, 7B, 7E, 9E.03 type, under the assistance of this kind of frock, the assembly welding flow of product has all obtained the solidification, each assembly size of product has all obtained the assurance, the welding deformation of product has also obtained effectual control, simultaneously, each item that brings with the help of the frock assemble the facility and the fixed back later stage of size reprocess work load's reduction, this frock still makes the assembly welding efficiency of product obtain great promotion, manufacturing cost significantly reduces, has stronger cost reduction increase function.
In the design of frock, from the assembly dimension of single part to the assembly error between the part, to the holistic welding deformation of diffuser again, each size of strict control product to when providing size location and dress and weld the convenience and then improve dress and weld efficiency, make the outward appearance shaping of product more unanimous, let the product possess higher quality.
The tool manufactured under the guidance of the design scheme of the universal tool for assembling and welding the exhaust diffuser not only improves the assembly and welding efficiency of products and reduces the production cost of the products, but also greatly improves the forming quality of the whole product, and particularly has very obvious economic benefit for a tool to serve a plurality of sets of products in the mass production process.

Claims (6)

1. The assembling method of the gas turbine exhaust diffuser is characterized in that an assembling and welding tool is used for assembling, the assembling and welding tool comprises a base device and a walking platform support (1), the base device comprises an inner barrel placing ring (2) and an outer barrel placing ring (3), the inner barrel placing ring (2) and the outer barrel placing ring (3) are connected through a connecting frame (4), a plurality of positioning partition plates (5) are arranged between the inner barrel placing ring (2) and the outer barrel placing ring (3), a plurality of positioning mechanisms (6) for positioning a flow guide ring (12) are arranged on the positioning partition plates (5) along the inclined surfaces of the positioning partition plates, the outer barrel placing ring (3) is connected with a mounting seat (8) through a connecting mechanism (7), the lower end of the walking platform support (1) is connected with the mounting seat (8), a plurality of press-mounting plates (10) for press-mounting a walking platform (13) of the diffuser are arranged on the walking platform support (1), one end of the press-mounting plate (10) is pressed on the walking platform (13), the other end of the press-mounting plate is connected with the walking platform bracket (1) through a bolt, a press ring (11) is arranged on the walking platform (13), and the press ring (11) is arranged between the walking platform (13) and the press-mounting plate (10);
the method comprises the following steps:
step one, independently manufacturing each part of the exhaust diffuser;
secondly, an inner front flange (14) and an outer front flange (15) of the diffuser are respectively placed on the inner cylinder placing ring (2) and the outer cylinder placing ring (3), after the concentricity of the inner front flange (14) and the outer front flange (15) is adjusted, the inner front flange (14) and the outer front flange (15) are pressed on the inner cylinder placing ring (2) and the outer cylinder placing ring (3) through a pressing plate mechanism;
thirdly, mounting an inner cylinder (16) and an outer cylinder (17) according to the positions of an inner front flange (14) and an outer front flange (15), then mounting a flow guide ring (12) on a positioning mechanism (6) on a positioning partition plate (5) in a layering manner, mounting a reinforcing rib (18) and a supporting pipe (19) after the size is determined to be correct, checking the overall size again, and fixing all main body components in a spot welding manner;
folding the walking board support (1) and the base device, connecting the mounting seat (8) and the walking board support (1) through a bolt after checking the concentricity of the walking board support (1) and the base device, press-mounting the walking board (13) through a press-mounting plate (10) and a press ring (11), assembling a keel (20) and the rest of the main components, checking the correct size, and performing spot welding for fixation;
step five, placing an integral cylindrical structure formed by assembling the tool and the main body part of the diffuser on a roller carrier for spin welding, and removing the main body of the diffuser from the tool after welding;
after welding is finished, scribing and cutting the diffuser from the half, horizontally placing the machined half on an assembly platform, connecting one half of the cut diffuser with one half of the half, erecting an assembly part after connection, assembling and connecting the two halves of the half through a tooling screw pin (22), assembling and connecting the remaining half of the diffuser with the other half of the half, and after the diffusers are folded, performing spot welding and then performing integral welding; the tool screw pin (22) comprises a pin rod section (2201) and a screw rod section (2202), the pin rod section (2201) is inserted into the connecting holes of the two half of a half.
2. The method for assembling a gas turbine exhaust diffuser of claim 1, wherein in the second step, a tooling support pipe (21) is installed between the inner front flange (14) and the outer front flange (15).
3. A method of assembling a gas turbine exhaust diffuser according to claim 1, wherein the staging support (1) comprises a support platform (101), the support platform (101) being connected to a mounting ring (103) by vertical supports (102), the mounting ring (103) being connected to the mounting base (8) by bolts.
4. A method of assembling a gas turbine exhaust diffuser in accordance with claim 1, wherein said positioning means (6) is a plurality of positioning slots.
5. The method for assembling a gas turbine exhaust diffuser according to claim 1, wherein a plurality of pressing plate mechanisms are arranged on the inner cylinder placing ring (2) and/or the outer cylinder placing ring (3), each pressing plate mechanism comprises a pressing plate (9), and the pressing plates (9) are connected with the inner cylinder placing ring (2) or the outer cylinder placing ring (3) through bolts.
6. A method of assembling a gas turbine exhaust diffuser in accordance with claim 1, wherein the pressure plate (9) is of "L" configuration, the free end of the pressure plate (9) abutting the inner wall of the inner forward flange (14) or the outer wall of the outer forward flange (15).
CN202111153894.4A 2021-09-29 2021-09-29 Assembly and welding tool and assembly method for gas turbine exhaust diffuser Active CN113751913B (en)

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CN113751913B true CN113751913B (en) 2022-08-26

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Publication number Priority date Publication date Assignee Title
JP2003106631A (en) * 2001-10-01 2003-04-09 Toshiba Corp Method of installation at duct replacement
CN203679615U (en) * 2014-01-21 2014-07-02 株洲联诚集团有限责任公司 Main air duct interchange assembling and welding tool
CN105195947B (en) * 2015-10-13 2017-02-01 宜昌船舶柴油机有限公司 Group welding method and assembly fixture for inner barrel and outer barrel of connecting pipe with through hole support
US10883387B2 (en) * 2016-03-07 2021-01-05 General Electric Company Gas turbine exhaust diffuser with air injection
CN207171355U (en) * 2017-09-26 2018-04-03 宜昌船舶柴油机有限公司 A kind of gas turbine exhaust diffuser welding tooling
CN208644484U (en) * 2018-06-27 2019-03-26 上海红重机械装备有限公司 A kind of exhaust diffuser assembly tooling

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