CN110370044B - Center hole machining clamp for steam turbine moving blade and clamping method thereof - Google Patents
Center hole machining clamp for steam turbine moving blade and clamping method thereof Download PDFInfo
- Publication number
- CN110370044B CN110370044B CN201910689013.7A CN201910689013A CN110370044B CN 110370044 B CN110370044 B CN 110370044B CN 201910689013 A CN201910689013 A CN 201910689013A CN 110370044 B CN110370044 B CN 110370044B
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- blade
- seat
- clasping
- blade root
- center
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 238000003754 machining Methods 0.000 title claims abstract description 12
- 229910003460 diamond Inorganic materials 0.000 claims description 4
- 239000010432 diamond Substances 0.000 claims description 4
- 238000005553 drilling Methods 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 abstract description 4
- QNRATNLHPGXHMA-XZHTYLCXSA-N (r)-(6-ethoxyquinolin-4-yl)-[(2s,4s,5r)-5-ethyl-1-azabicyclo[2.2.2]octan-2-yl]methanol;hydrochloride Chemical compound Cl.C([C@H]([C@H](C1)CC)C2)CN1[C@@H]2[C@H](O)C1=CC=NC2=CC=C(OCC)C=C21 QNRATNLHPGXHMA-XZHTYLCXSA-N 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q3/00—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine
- B23Q3/02—Devices holding, supporting, or positioning work or tools, of a kind normally removable from the machine for mounting on a work-table, tool-slide, or analogous part
- B23Q3/06—Work-clamping means
- B23Q3/062—Work-clamping means adapted for holding workpieces having a special form or being made from a special material
- B23Q3/063—Work-clamping means adapted for holding workpieces having a special form or being made from a special material for holding turbine blades
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The center hole machining clamp for the moving blade of the steam turbine and the clamping method thereof can avoid the displacement of the blade, can ensure the accuracy of the stability of the blade and the machining position of the center hole of the blade, and comprises a single tip device and a double tip device, wherein a blade shroud holding device and a blade root holding device are arranged between the single tip device and the double tip device, the blade root holding device comprises a blade shroud holding beam, a blade shroud holding seat, the blade root holding device comprises a blade root holding beam, a blade root holding seat, the blade shroud holding beam, the blade root holding beam, the blade shroud holding seat top end, the blade root holding seat top end is respectively provided with at least two locking bolts, and the clamping step comprises: s1, a blade is placed on the blade shroud locking seat and the blade root locking seat, S2 transverse positioning of the blade is achieved through the single-tip device and the double-tip device on the two sides, S3 locking and fixing of the blade are achieved through the blade shroud locking device and the blade root locking device, and S4 clamping is achieved by detaching the single-tip device and the double-tip device.
Description
Technical Field
The invention relates to the technical field of turbine moving blade machining equipment, in particular to a clamp for machining a center hole of a turbine moving blade.
Background
The moving blade is used as a core component of the steam turbine, the quality and the machining precision of the moving blade directly affect the performance of the steam turbine, particularly when a central hole of the moving blade is machined, the central hole is used as a positioning reference of the blade, and higher requirements are provided for the machining precision, as fig. 1 is a structural schematic diagram of a common moving blade, when the moving blade is machined, a central hole needs to be machined in the moving blade.
Disclosure of Invention
The invention provides a fixture for processing a central hole of a moving blade of a steam turbine, aiming at the problems that when the blade bears larger torsion, the stability of the moving blade cannot be ensured by adopting a pressing plate pressing mode in the existing fixture, so that the moving blade generates displacement on the fixture, and the position accuracy and the dimensional accuracy of the central hole are influenced.
The fixture is characterized in that a blade crown holding device and a blade root holding device are arranged between the single tip device and the double tip device, the blade crown holding device is close to the single tip device, the blade root holding device is close to the double tip device, the blade crown holding device comprises a blade crown holding beam and a blade crown holding seat, the blade root holding device comprises a blade root holding beam and a blade root holding seat, the bottom ends of the blade crown holding seat and the blade root holding seat are respectively fixed on the bottom plate, one end of the blade crown holding beam is rotatably installed at one end of the blade crown holding seat through a shaft pin, the other end of the blade crown holding beam is fixed with the other end of the blade crown holding seat through a bolt, a cavity formed after the blade crown holding beam and the blade root holding seat are tightly enclosed is in a rhombic shape, one end of the blade holding beam is installed at one end of the blade crown holding seat through the shaft pin, the other end of the blade root holding beam is fixed with the other end of the blade crown holding seat through a bolt, and the other end of the blade root holding beam is at least provided with a rhombic shape of the blade root holding beam.
It is further characterized in that it comprises,
the blade crown holding beam, the blade root holding beam, the top end of the blade root holding seat and the top end of the blade root holding seat are all L-shaped;
the single-centre device comprises a single-centre seat and a movable centre, the bottom end of the single-centre seat is fixed on the bottom plate through a screw, the movable centre is fixed at the top end of the single-centre seat through a cover plate screw assembly, the cover plate screw assembly comprises a cover plate, a bushing is arranged at the top end of the single-centre seat, a spring is sleeved on the movable centre, the apical end of the movable centre penetrates through the bushing to correspond to a positioning hole in the blade crown, and the screw penetrates through the cover plate and the bushing to be abutted to the non-apical end of the movable centre;
the double-center device comprises a double-center seat and two movable centers, the bottom ends of the double-center seat are fixed on the base through screws, the top ends of the double-center seat are L-shaped, the two movable centers are respectively arranged on a vertical plate and a transverse plate of the L-shaped double-center seat, the movable centers are respectively fixed on the double-center seat through cover plate screw assemblies, and the top ends of the movable centers face to positioning holes in the blade roots.
A method for clamping a moving blade of a steam turbine based on the fixture specifically comprises the following steps:
s1, placing the blade on the blade shroud hugging seat and the blade root hugging seat;
s2, realizing transverse positioning of the blade through the single tip device and the double tip device on two sides;
s3, locking and fixing of the blade are achieved through the blade shroud holding device and the blade root holding device;
s4, disassembling the single-center device and the double-center device to realize clamping;
and S5, processing the central hole of the blade, placing a central hole processing device on one side of the blade root holding device, and drilling a hole by a processing cutter on the central hole processing device corresponding to the corresponding position of the blade, so that the processing of the central hole of the moving blade of the steam turbine is realized.
The method is applied to the processing of the central hole of the moving blade of the steam turbine, the blade is placed on a blade shroud clasping seat and a blade root clasping seat, the positioning of the blade is realized through a single-tip device and a double-tip device on two sides, a blade shroud clasping beam rotates by taking a pin shaft as the center, the blade shroud of the blade is placed in a cavity formed by the blade shroud clasping beam and the blade shroud clasping seat, a blade root clasping beam rotates by taking the pin shaft as the center, a blade root of the blade is placed in a cavity formed by the blade root clasping beam and the blade root clasping seat, and locking bolts at the top end of the blade shroud clasping beam, the blade root clasping beam, the blade shroud clasping seat and the blade root clasping seat are screwed on the blade, so that each bolt is abutted against the blade, and the blade shroud and the blade root of the blade are locked and fixed in the circumferential direction; make the blade shroud of blade, the equal atress of blade root supports through this device, and hold the device tightly through the blade shroud, the locking spiral on the blade root holds the device tightly makes the blade shroud, the equal atress of circumference of blade root, it is consequently fixed more firm, hold the cavity that the base constitutes tightly with the blade shroud, the blade root holds the cavity that the roof beam and the blade root hold the seat and constitute tightly and all sets up to the rhombus, can hold the blade shroud of blade, the blade root is firm and is held tightly in the cavity, and when carrying out centre bore man-hour to the blade, can effectively avoid the blade to produce the displacement because of receiving torsion, thereby the accuracy of blade centre bore processing position has been ensured, the requirement of machining precision has been satisfied.
Drawings
FIG. 1 is a schematic front view of a conventional blade;
FIG. 2 is a schematic structural view of a front view of the present invention;
FIG. 3 is a schematic top view of the present invention;
FIG. 4 is a schematic view of the P-direction structure of FIG. 2;
FIG. 5 is a schematic view of the structure in the direction Q of FIG. 2;
fig. 6 is a schematic view of the structure in the direction R of fig. 2.
Detailed Description
Referring to fig. 1 to 6, a fixture for processing a central hole of a moving blade of a steam turbine comprises a base plate 1, wherein a single-tip device 2 and a double-tip device 3 are respectively arranged on two sides of the top end of the base plate 1, the single-tip device 2 comprises a single-tip seat 21 and a movable tip 22, the bottom end of the single-tip seat 21 is fixed on the base plate 1 through a screw, the movable tip 22 is fixed on the top end of the single-tip seat 21 through a cover plate screw assembly, the cover plate screw assembly comprises a cover plate 23, a bushing 24 is arranged on the top end of the single-tip seat 21, a spring 25 is sleeved on the movable tip 21, the spring 25 facilitates resetting of the tip, the tip end of the movable tip 22 penetrates through the bushing 24 to correspond to a positioning hole in a blade crown, and the screw 26 penetrates through the cover plate 23 and the bushing 24 to abut against a non-tip end of the movable tip 22; the double-centre device 3 comprises a double-centre seat 31 and two movable centres 32, the bottom end of the double-centre seat 31 is fixed on the base 1 through screws, the top end of the double-centre seat 31 is L-shaped, the two movable centres 32 are respectively arranged on a vertical plate and a horizontal plate of the L-shaped double-centre seat 31, the movable centres 32 are respectively fixed on the double-centre seat 31 through cover plate screw assemblies, and the apical ends of the movable centres 32 face positioning holes in blade roots;
a blade crown holding device 4 and a blade root holding device 5 are arranged between the single tip device 2 and the double tip device 3, the blade crown holding device 3 is arranged close to the single tip device 2, the blade root holding device 5 is arranged close to the double tip device, the blade crown holding device 4 comprises a blade crown holding beam 41 and a blade crown holding seat 42, the blade root holding device 5 comprises a blade root holding beam 51 and a blade root holding seat 52, and the blade crown holding beam 41, the blade root holding beam 51, the top end of the blade root holding seat 42 and the top end of the blade root holding seat 52 are all L-shaped; the bottom ends of the blade shroud clasping seat 42 and the blade root clasping seat 52 are respectively fixed on the bottom plate 1 through screws, one end of the blade shroud clasping beam 41 is rotatably installed at one end of the blade shroud clasping seat 42 through a shaft pin 43, the other end of the blade shroud clasping beam 41 is fixed with the other end of the blade shroud clasping seat 42 through a bolt 44, a cavity formed by the blade shroud clasping beam 41 and the blade shroud clasping seat 42 after being enclosed is in a diamond shape, one end of the blade root clasping beam 51 is rotatably installed at one end of the blade root clasping seat 52 through a shaft pin 53, the other end of the blade root clasping beam 51 is fixed with the other end of the blade root clasping seat 52 through a bolt 54, the cavity formed by the blade root clasping beam 51 and the blade root clasping seat 52 after being enclosed is in a diamond shape, the top ends of the blade shroud clasping beam 41, the blade root clasping beam 51, the blade shroud clasping seat 42 and the blade root clasping seat 52 are respectively provided with at least two locking bolts 6, and four locking bolts 6 are respectively arranged at the top ends of the blade root shroud clasping beam 41, the blade root clasping beam 51, the blade shroud clasping seat 42 and the blade root clasping seat 52 in the embodiment.
The invention is applied to the processing of a central hole of a moving blade of a steam turbine, and the method for clamping the blade 7 by applying the clamp comprises the following steps: s1, placing a blade 7 on a blade shroud hugging seat 42 and a blade root hugging seat 52;
s2, the positioning of the blade 7 is realized through the single-tip device 2 and the double-tip device 3 on the two sides, specifically: manually rotating the blade 7 to enable the movable center 22 on the single-center seat 21 to correspond to the positioning hole on the blade crown of the blade 7, screwing the screw 26 of the non-apical end, enabling the screw 26 to push the spring 25 to compress and pushing the movable center 22 to move towards the positioning hole on the blade crown, enabling the apical end of the movable center 22 to be pressed against the blade crown, then enabling the movable centers 32 on the double-center seats 3 to correspond to the positioning holes on the blade root of the blade, screwing the screw 26 of the non-apical end, enabling the screw 26 to push the spring 25 to compress and pushing the centers to move towards the positioning hole on the blade root, enabling the apical ends of the movable centers 32 to be respectively pressed against the corresponding positioning holes on the blade root, and accordingly achieving positioning of the blade 7, and enabling the single-center device 2 and the double-apical device 3 to achieve transverse fixing of the blade 7;
s3, the blade 7 is locked and fixed through the blade shroud holding device 4 and the blade root holding device 5, and the method is specific: the blade shroud clasping beam 41 rotates by taking the pin shaft 43 as a center, the blade shroud of the blade 7 is placed in a cavity formed by the blade shroud clasping beam 41 and the blade shroud clasping seat 42, the blade root clasping beam 51 rotates by taking the pin shaft 53 as a center, the blade root of the blade 7 is placed in a cavity formed by the blade root clasping beam 51 and the blade root clasping seat 52, and the locking bolts 6 at the top ends of the blade shroud clasping beam 41, the blade root clasping beam 51, the blade shroud clasping seat 42 and the blade root clasping seat 52 are screwed to enable each bolt 6 to abut against the blade 7, so that the blade shroud and the blade root of the blade 7 are locked and fixed in the circumferential direction;
s4, disassembling the single tip device 2 and the double tip device 3 to clamp the moving blade of the steam turbine; the single-center base 21 and the double-center base 31 are respectively fixed on the bottom plate 1 through screws, so that the single-center device 2 and the double-center device 3 are convenient to disassemble and assemble, the time can be saved, and the efficiency can be improved;
and S5, processing a central hole of the moving blade of the steam turbine, namely, placing a central hole processing device on one side of the blade root holding device 5, and drilling a hole corresponding to a corresponding position by a processing tool on the processing device (the processing position of the central hole is drawn on the blade in advance, so that the central hole is conveniently positioned during processing), thereby realizing the processing of the central hole of the moving blade of the steam turbine, wherein the position corresponding to the processing tool during processing is the position of a positioning hole corresponding to a movable center of a single-center seat on the blade.
The top ends of the blade shroud enclasping beam 41, the blade root enclasping beam 51, the blade root enclasping seat 42 and the blade root enclasping seat 52 in the device are all set to be L-shaped, so that the blade shroud enclasping beam 42, the blade root enclasping beam 51, the top end of the blade root enclasping seat 4, the blade root enclasping seat 52 and screws on the upper part thereof form an external quadrangle of the blade 7, the uniform stress of the circumference of the blade 7 can be ensured, the transverse displacement caused by torsion in the process of processing a blade center hole can be effectively avoided, and the accuracy of the processing position of the blade center hole is ensured.
Claims (4)
1. The clamping method of the clamp for processing the central hole of the moving blade of the steam turbine comprises a base plate, wherein a single tip device and a double tip device are respectively arranged on two sides of the top end of the base plate, and is characterized in that a blade shroud holding device and a blade root holding device are arranged between the single tip device and the double tip device, the blade shroud holding device is close to the single tip device, the blade root holding device is close to the double tip device, the blade shroud holding device comprises a blade shroud holding beam and a blade shroud holding seat, the blade root holding device comprises a blade root holding beam and a blade root holding seat, the bottom ends of the blade shroud holding seat and the blade root holding seat are respectively fixed on the base plate, one end of the blade crown clasping beam is rotatably installed at one end of the blade crown clasping seat through a shaft pin, the other end of the blade crown clasping beam is fixed with the other end of the blade crown clasping seat through a bolt, a cavity formed after the blade crown clasping beam and the blade crown clasping seat are enclosed is a diamond shape, one end of the blade root clasping beam is rotatably installed at one end of the blade root clasping seat through the shaft pin, the other end of the blade root clasping beam is fixed with the other end of the blade root clasping seat through a bolt, a cavity formed after the blade root clasping beam and the blade root clasping seat are enclosed is a diamond shape, and the blade crown clasping beam, the blade root clasping beam, the top end of the blade crown clasping seat and the top end of the blade root clasping seat are respectively provided with at least two locking bolts;
when the moving blade of the steam turbine is clamped, the method specifically comprises the following steps:
s1, placing the blade on the blade shroud hugging seat and the blade root hugging seat;
s2, realizing transverse positioning of the blade through the single tip device and the double tip device on two sides;
s3, locking and fixing of the blade are achieved through the blade shroud holding device and the blade root holding device;
s4, disassembling the single center device and the double center device to realize clamping;
and S5, processing the central hole of the blade, placing a central hole processing device on one side of the blade root holding device, and drilling holes on a processing cutter on the central hole processing device corresponding to the corresponding position of the blade to realize the processing of the central hole of the moving blade of the steam turbine.
2. The clamping method for the machining clamp for the central hole of the moving blade of the steam turbine as claimed in claim 1, wherein the blade shroud hugging beam, the blade root hugging beam, the top end of the blade root hugging seat and the top end of the blade root hugging seat are all L-shaped.
3. The clamping method of the machining clamp for the central hole of the moving blade of the steam turbine according to claim 1, wherein the single center device comprises a single center seat and a first movable center, the bottom end of the single center seat is fixed on the bottom plate through a first screw, the first movable center is fixed at the top end of the single center seat through a first cover plate screw assembly, the first cover plate screw assembly comprises a cover plate, a bushing is arranged at the top end of the single center seat, a spring is sleeved on the first movable center, the pointed end of the first movable center penetrates through the bushing and corresponds to a positioning hole in a blade crown, and a second screw penetrates through the cover plate and the bushing and abuts against the non-pointed end of the first movable center.
4. The clamping method of the machining clamp for the central hole of the moving blade of the steam turbine according to any one of claims 1 or 3, wherein the double-center device comprises a double-center seat and two movable centers II, the bottom end of the double-center seat is fixed on the bottom plate through a third screw, the top end of the double-center seat is L-shaped, the two movable centers II are respectively arranged on a vertical plate and a horizontal plate of the L-shaped double-center seat, the movable centers II are respectively fixed on the double-center seat through a second cover plate screw assembly, and the top ends of the movable centers II face towards the positioning holes in the blade root.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910689013.7A CN110370044B (en) | 2019-07-29 | 2019-07-29 | Center hole machining clamp for steam turbine moving blade and clamping method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910689013.7A CN110370044B (en) | 2019-07-29 | 2019-07-29 | Center hole machining clamp for steam turbine moving blade and clamping method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110370044A CN110370044A (en) | 2019-10-25 |
| CN110370044B true CN110370044B (en) | 2023-03-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910689013.7A Active CN110370044B (en) | 2019-07-29 | 2019-07-29 | Center hole machining clamp for steam turbine moving blade and clamping method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110370044B (en) |
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| JP3172627U (en) * | 2011-10-07 | 2012-01-05 | 伊藤 幸男 | Turbine blade both-end gripping device |
| CN202951901U (en) * | 2012-11-01 | 2013-05-29 | 东方电气集团东方汽轮机有限公司 | Blade perforating device |
| CA2849214A1 (en) * | 2013-04-23 | 2014-10-23 | Siemens Aktiengesellschaft | Wind turbine blade holding arrangement |
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| CN107838719A (en) * | 2017-12-04 | 2018-03-27 | 无锡透平叶片有限公司 | Fixture for compressor blade dove-tail form blade root machining |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7168899B2 (en) * | 2004-04-22 | 2007-01-30 | General Electric Company | Apparatus and method for centering a workpiece on a machine tool |
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| JP3172627U (en) * | 2011-10-07 | 2012-01-05 | 伊藤 幸男 | Turbine blade both-end gripping device |
| CN202951901U (en) * | 2012-11-01 | 2013-05-29 | 东方电气集团东方汽轮机有限公司 | Blade perforating device |
| CA2849214A1 (en) * | 2013-04-23 | 2014-10-23 | Siemens Aktiengesellschaft | Wind turbine blade holding arrangement |
| CN203992329U (en) * | 2014-08-01 | 2014-12-10 | 南京赛达机械制造有限公司 | A kind of steam turbine die forging blade special fixture |
| CN206702367U (en) * | 2017-05-22 | 2017-12-05 | 哈尔滨汽轮机厂有限责任公司 | A kind of fixture for the T-shaped blade root of linear cutter rhombus blade |
| CN107838719A (en) * | 2017-12-04 | 2018-03-27 | 无锡透平叶片有限公司 | Fixture for compressor blade dove-tail form blade root machining |
| CN209131543U (en) * | 2018-12-14 | 2019-07-19 | 德阳六合能源材料有限公司 | A kind of cubing detecting blade hole location and the fixture for processing integral shroud thinning part |
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| CN110370044A (en) | 2019-10-25 |
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Effective date of registration: 20231128 Address after: No. 1800, Huishan Avenue, Huishan Economic Development Zone, Wuxi City, Jiangsu Province Patentee after: WUXI TURBINE BLADE Co.,Ltd. Address before: 214174 No. 18, Yanfeng Road, Yanqiao street, Huishan District, Wuxi City, Jiangsu Province Patentee before: WUXI AIERFU BLADE Co.,Ltd. |
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