CN113333549A - Method for processing front ring of flame tube of gas turbine - Google Patents
Method for processing front ring of flame tube of gas turbine Download PDFInfo
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- CN113333549A CN113333549A CN202110686806.0A CN202110686806A CN113333549A CN 113333549 A CN113333549 A CN 113333549A CN 202110686806 A CN202110686806 A CN 202110686806A CN 113333549 A CN113333549 A CN 113333549A
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- ring
- head
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- dress
- flame tube
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
- B21D43/28—Associations of cutting devices therewith
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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
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/346—Working by laser beam, e.g. welding, cutting or boring in combination with welding or cutting covered by groups B23K5/00 - B23K25/00, e.g. in combination with resistance welding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
Abstract
The invention discloses a method for processing a front ring of a flame tube of a gas turbine, which comprises the following steps: manufacturing a conical ring similar to the head ring structure by using a lathe, placing the conical ring on a stamping die, sleeving a head ring body on the periphery of a punch, cutting the smaller end of the head ring body by using the lathe, fixing the head ring body on a cutting device, cutting the larger end of the head ring body by using a cutting machine, cutting off the folded part of the larger end, rolling and forming by using a sheet metal to obtain a conical cylinder ring, sleeving the head ring and the conical cylinder ring outside a connecting device and coaxially arranging the head ring and the connecting device, and welding the tail end of the head ring and the head end of the conical cylinder ring to obtain a front ring; the processing method of the invention effectively ensures the consistency of the size of the lap joint opening part, so that the ideal welding gap is achieved after the cylinder rings are assembled; meanwhile, the shape correction of the size of the mouth part is avoided.
Description
Technical Field
The invention belongs to the field of peripheral parts of gas turbines, and particularly relates to a method for machining a front ring of a flame tube of a gas turbine.
Background
Along with the continuous improvement of the design performance of a gas turbine, the design of a casing structure is more and more complex, and the forming of a complex thin-wall part made of special materials is a difficult point in the field of gas turbine part processing, and particularly along with the continuous appearance of new materials, the problem is more and more urgent to solve. For example, each cylinder ring of a flame cylinder of a certain gas turbine adopts GH3044 plates with the thickness of 1.5mm, and each section is formed separately and then is assembled and formed by argon arc welding and resistance welding.
The front ring in the prior art is mostly formed by split stamping or spinning, the split forming is complicated by using stamping equipment, and the appearance of the front ring is difficult to meet the assembly requirement due to hardening and uncontrollable deformation at a welding seam during three-split welding; and spinning needs special tooling equipment, and the processing cost is higher.
Disclosure of Invention
The invention aims to provide a method for processing a front ring of a flame tube of a gas turbine, which aims to solve the problems of low forming and processing precision and high cost of the front ring.
The invention adopts the following technical scheme: a method for processing the front ring of flame tube of gas turbine is characterized by that the front ring is composed of a head ring and a conic tube ring welded together from head end to tail end, the head ring has a ring structure with small inlet and big outlet, the opening of one end of head ring close to conic tube ring is big, multiple through holes for regulating air flow are perforated on the side wall of head ring, the conic tube ring has a ring structure with big inlet and small outlet, and the opening of one end close to head ring is big,
the processing method of the front ring comprises the following steps:
a conical ring similar to the structure of the head ring is manufactured by a lathe,
an anti-folding groove is arranged on the side wall of the conical ring close to the larger side of the opening and around the conical ring,
placing the conical ring on a stamping die, so that a punch head attached to the profile of the inner wall of the head ring stamps the conical ring to obtain a head ring body,
the head annular body is sleeved on the periphery of the punch, the smaller end of the head annular body is cut by a lathe, so that the structure of the smaller end of the head annular body is the same as the head end of the head ring,
fixing the head annular body on a cutting device, cutting the larger end of the head annular body by using a cutting machine, cutting off the folded part of the larger end to ensure that the structure of the end with the larger opening of the head annular body is the same as the tail end of the head ring, thereby obtaining the head ring,
then a metal plate is utilized to be rolled and formed to obtain a conical cylinder ring,
and sleeving the head ring and the conical cylinder ring outside the connecting device and coaxially arranging the head ring and the conical cylinder ring, so that the tail end of the head ring is contacted with the head end of the conical cylinder ring, and then welding the tail end of the head ring and the head end of the conical cylinder ring to obtain the front ring.
Further, the stamping die comprises a cylindrical female die located below and a punch located above, and the concave structure of the cylindrical female die and the lower portion of the punch are matched with each other to stamp the conical ring, so that the conical ring is stamped by the punch and then forms a head annular body which is the same as the concave structure of the cylindrical female die.
Further, cutting device includes circular shape baffle and briquetting, baffle and the coaxial setting of briquetting, and through bolt reciprocal anchorage, the outer wall of baffle is used for the less one end of head ring body opening to embolia, the baffle is circular, and its outer wall outwards protrudes gradually and then laminates with the less one end inner wall profile of head ring body opening, the diameter of briquetting is greater than the diameter of the less one end of baffle and head ring body opening, one side that the briquetting is close to the baffle is used for the less one end of head ring body opening to support on its lateral wall, and then make baffle and briquetting fix head ring body, be convenient for cut the great one end of head ring body opening.
Furthermore, the outer wall of the connecting device is attached to the profile of the inner wall of the front ring,
the connecting device comprises a left assembling body, a middle assembling body and a right assembling body which are arc-shaped, two ends of the left assembling body, the middle assembling body and the right assembling body are sequentially spliced to form a hollow circular connecting device, the connecting device is used for sleeving the head ring and the conical cylinder ring on the outer wall of the connecting device so as to conveniently weld the tail end of the head ring and the head end of the conical cylinder ring which are mutually contacted,
the left side is joined in marriage the dress body, is joined in marriage the dress body and the right side and is joined in marriage the one end that the dress body is close to its arc center and for joining in marriage the inner end, keeps away from the one end of arc center and for joining in marriage the dress outer end, and the left side is joined in marriage the dress body, is joined in marriage the dress body and the right side and joins in marriage the dress body and inwards cave in along two axial borders and form and join in marriage the dress fixed slot, respectively join in marriage the dress fixed slot and be used for joining in marriage the dress body, well dress body and the right side and join in marriage the dress body and fix the annular connecting device of formation cavity to a left side.
Further, the connecting device further comprises: a sealing plate is arranged on the top of the container,
the shrouding is the ring form, and the shrouding is used for joining together its formation annular through the bolt left side and joins in marriage the dress body, well dress body and right side and joins in marriage the dress body and join in marriage in proper order and join in marriage the dress fixed slot, and then join in marriage the dress body, well dress body and right side and join in marriage the dress body and splice into annular connecting device.
Furthermore, the shrouding is provided with two, and two shroudings are used for fixing respectively and join in marriage the dress body in the left side, join in marriage the dress body and the right side joins in marriage the dress body the inner inwards sunken two borders of axial and form two and join in marriage in the dress fixed slot.
Furthermore, the mutual splicing positions of the left assembling body and the middle assembling body and the mutual splicing positions of the right assembling body and the middle assembling body are provided with chamfers.
Furthermore, a groove is formed in one end, spliced with the right assembly body, of the left assembly body, a triangular protrusion is formed in one end, spliced with the left assembly body, of the right assembly body, and the protrusion is matched with the groove, so that the left assembly body and the right assembly body can be conveniently spliced.
The invention has the beneficial effects that: the stamping die disclosed by the invention is simple in structure, good in forming, convenient to operate and capable of reducing the processing cost; meanwhile, the correction of the size of the molded surface is avoided, the processing time is saved, and the production efficiency is improved; the processing method of the invention effectively ensures the consistency of the size of the lap joint opening part, so that the ideal welding gap is achieved after the cylinder rings are assembled; meanwhile, the shape correction of the size of the mouth part is avoided; according to the invention, the cutting device and the stamping die are matched with each other to process the front ring, so that the lap joints of the head ring and the cone ring in the front ring have the same size, and the processing is convenient; make head ring and awl section of thick bamboo ring weld under the unanimous condition of assurance overlap joint mouth size through setting up connecting device, and then the anterior ring that obtains is formed well, and the uniformity is high.
Drawings
FIG. 1 is a schematic structural view of a flame tube according to the present invention;
FIG. 2 is a schematic view of the structure of the neck ring of the torch according to the invention;
FIG. 3 is a schematic view of the structure of the processing apparatus of the present invention;
FIG. 4 is a schematic structural diagram of the rings of the flame tube of the present invention;
FIG. 5 is a schematic structural view of the cartridge ring assembly of the present invention;
FIG. 6 is a schematic view of the front ring of the present invention;
FIG. 7 is a schematic structural view of a stamping die according to the present invention;
FIG. 8 is a schematic view of the cutting device according to the present invention;
FIG. 9 is a schematic view of the structure of the connecting device of the present invention;
FIG. 10 is a front view of the collar assembly of the present invention;
fig. 11 is a schematic structural view of the assembling device of the present invention.
Wherein: 1. a neck ring; 2. a front ring; 3. a first section of the liner; 4. a second section of the liner; 5. a third section of the flame tube; 6. a fourth section of the liner; 7. a fifth section of the flame tube; 8. a rear ring; 9. a base; 10. a mandrel; 11. a first boss; 12. a second boss; 13. a third boss; 14. a fourth boss; 15. a fifth boss; 16. a sixth boss; 17. a neck disc; 18. a head end groove; 20. a first positioning plate; 21. a second positioning plate; 22. a third positioning plate; 23. a fourth positioning plate; 24. a fifth positioning plate; 25. a sixth positioning plate; 26. a front ring; 27. a conical surface ring; 28. fixing the ribs; 29. a front gland; 30. a rear gland; 31. a wedge-shaped groove; 32. a support pillar; 33. a head ring; 34. a conical cylinder ring; 35. a columnar female die; 36. a punch; 37. a baffle plate; 38. briquetting; 39. a left fitting body; 40. fixing the screw rod; 41. a right fitting body; 42. assembling the inner end; 43. assembling the outer end; 44. assembling a fixing groove; 45. closing the plate; 46. a front barrel ring; 47. a rear cylinder ring; 48. a left support; 49. a middle support body; 50. a right support body; 51. a support inner end; 52. supporting the outer end; 53. supporting the fixing groove; 54. and (7) a cover plate.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention discloses a method for processing a front ring of a gas turbine flame tube, as shown in fig. 6, a front ring 2 is composed of a head ring 33 and a conical ring 34 which are welded with each other from the head end to the tail end, the head ring 33 is in an annular structure with a small head end diameter and a large tail end diameter, one end of the head ring 33 close to the conical ring 34 is the tail end, a plurality of through holes are formed in the side wall of the head ring 33 in a penetrating manner and used for adjusting air flow, the conical ring 34 is in an annular structure with a large head end diameter and a small tail end diameter, one end of the conical ring 34 close to the head ring 33 is the head end, and the diameter of the tail end of the conical ring 34 is larger than the diameter of the head end of the head ring 33.
The processing method of the front ring 2 comprises the following steps:
a conical ring having a structure similar to that of the head ring 33 is manufactured by a lathe,
an anti-folding groove is arranged on the side wall of the conical ring close to the larger side of the opening and around the conical ring,
placing the conical ring on a stamping die, so that a punch 36 attached to the profile of the inner wall of the head ring 33 stamps the conical ring to obtain a head ring body,
the head ring body is sleeved on the periphery of the punch 36, the smaller end of the head ring body is cut by a lathe, so that the structure of the smaller end of the head ring body is the same as that of the head end of the head ring 33,
fixing the head annular body on a cutting device, cutting the larger end of the head annular body by using a cutting machine, cutting off the folded part of the larger end to ensure that the structure of the end with the larger opening of the head annular body is the same as the tail end of the head ring 33, further obtaining the head ring 33,
then the conical cylinder ring 34 is obtained by rolling and molding the sheet metal,
sleeving the head ring 33 and the cone-shaped cylinder ring 34 outside the connecting device and coaxially arranging the head ring 33 and the cone-shaped cylinder ring 34 to enable the tail end of the head ring 33 to be contacted with the head end of the cone-shaped cylinder ring 34, and then welding the tail end of the head ring 33 and the head end of the cone-shaped cylinder ring 34 to obtain the front ring 2.
As shown in fig. 7, the punching die includes a lower cylindrical concave die 35 and an upper punch 36, the concave structure of the cylindrical concave die 35 cooperates with the lower portion of the punch 36 to punch the conical ring, so that the conical ring is punched by the punch 36 and then forms a head ring body having the same concave structure as the cylindrical concave die 35.
As shown in fig. 8, the cutting device includes a circular baffle 37 and a pressing block 38, the baffle 37 and the pressing block 38 are coaxially disposed and fixed to each other by bolts, the outer wall of the baffle 37 is used for being sleeved in the end with the smaller opening of the head annular body, the baffle 37 is circular and gradually protrudes outward from the outer wall of the baffle 37 to be fitted with the inner wall profile of the end with the smaller opening of the head annular body, the diameter of the pressing block 38 is larger than the diameter of the end with the smaller opening of the baffle 37 and the head annular body, and the side of the pressing block 38 close to the baffle 37 is used for abutting against the side wall of the end with the smaller opening of the head annular body, so that the baffle 37 and the pressing block 38 fix the head annular body, and the end with the larger opening of the head annular body can be conveniently cut.
As shown in fig. 9, the outer wall of the connecting device is fitted to the inner wall profile of the front ring 2, the connecting device includes a left fitting body 39, a middle fitting body and a right fitting body 41 which are arc-shaped, two ends of the left fitting body 39, the middle fitting body and the right fitting body 41 are sequentially spliced to form a hollow circular connecting device, and the connecting device is used for sleeving the head ring 33 and the cone ring 34 on the outer wall thereof, so that the tail end of the head ring 33 and the head end of the cone ring 34 which are in contact with each other can be conveniently welded.
The left assembling body 39, the middle assembling body and the right assembling body 41 are provided with an inner end 42 at one end close to the arc center, an outer end 43 at one end far away from the arc center, the inner end 42 of the left assembling body 39, the middle assembling body and the right assembling body 41 is inwards sunken along two axial edges to form an assembling fixing groove 44, and each assembling fixing groove 44 is used for fixing the left assembling body 39, the middle assembling body and the right assembling body 41 to form a hollow circular connecting device.
As shown in fig. 9, the connecting device further includes a sealing plate 45, the sealing plate 45 is annular, and the sealing plate 45 is used for fixing the left fitting body 39, the middle fitting body and the right fitting body 41 in the annular fitting fixing groove 44 formed by sequentially splicing the left fitting body 39, the middle fitting body and the right fitting body 41 through bolts, so as to splice the left fitting body 39, the middle fitting body and the right fitting body 41 into the annular connecting device.
Two sealing plates 45 are arranged, the two sealing plates 45 are used for being fixed in two assembling fixing grooves 44 formed by inwards recessing two axial edges at the inner ends of the left assembling body 39, the middle assembling body and the right assembling body 41 respectively, and the joint positions of the left assembling body 39 and the middle assembling body and the joint positions of the right assembling body 41 and the middle assembling body are all provided with chamfers.
The left side is joined in marriage on the dress body 39, has seted up the recess with the one end that the right side joins in marriage the dress body 41 concatenation, and the right side joins in marriage on the dress body 41, sets up to triangular arch with the one end that the dress body 39 concatenation is joined in marriage to the left side, and the arch is mutually supported with the recess for the left side is joined in marriage dress body 39 and the right side and is joined in marriage dress body 41 and conveniently splice.
As shown in FIG. 1, the flame tube of the present invention is formed by coaxially arranging and annular from the head end to the tail end: the flame tube comprises a neck ring 1, a front ring 2, a first flame tube section 3, a second flame tube section 4, a third flame tube section 5, a fourth flame tube section 6, a fifth flame tube section 7 and a rear ring 8. The flame tube is an important part in a combustion chamber of a gas turbine, is circumferentially arranged in an annular cavity between an inner shell and an outer shell, and is communicated with adjacent flame tubes through crossfire tubes.
As shown in fig. 2, the neck ring 1 is composed of a front ring 26 and a conical ring 27 integrally connected from the head end to the tail end, the diameter of the conical ring 27 is larger than that of the front ring 26 to form the trumpet-shaped neck ring 1, fixing ribs 28 are fixedly connected to the outer wall of the conical ring 27 from the front ring 26 to the conical ring 27, and the fixing ribs 28 are used for supporting the front ring 2 and have a rectifying function.
As shown in fig. 6, the front ring 2 is composed of a head ring 33 and a cone ring 34 welded to each other from the head end to the tail end, the head ring 33 is an annular structure with a small inlet and a large outlet, the end of the head ring 33 close to the cone ring 34 is opened largely, a plurality of through holes are formed through the side wall of the head ring 33 for adjusting the air flow, and the cone ring 34 is an annular structure with a large inlet and a small outlet and the end close to the head ring 33 is opened largely.
As shown in fig. 4, the first section 3, the second section 4, the third section 5, the fourth section 6 and the fifth section 7 of the flame tube are composed of a front tube ring 46 with a wave-shaped outer wall and a rear tube ring 47 with a conical outer wall from the head end to the tail end.
The welding assembly method of the flame tube comprises the following steps:
the tail end of the neck ring 1 and the head end of the front ring 2 are welded by argon arc welding,
the head end of the first section 3 of the flame tube is welded to the tail end of the front ring 2 by resistance welding,
the head end of the second section 4 of the flame tube is welded to the tail end of the first section 3 of the flame tube by resistance welding,
the communication holes for connecting with other flame tubes are formed on the first section 3 of the flame tube by cutting with a laser cutting machine,
a flame tube is welded on the outer wall of the first section 3 of the flame tube and corresponding to the through hole,
the head end of the third section 5 of the flame tube is welded to the tail end of the second section 4 of the flame tube by resistance welding,
the head end of the fourth section 6 of the flame tube is welded to the tail end of the third section 5 of the flame tube by resistance welding,
the tail end of the fifth section 7 of the flame tube and the head end of the rear ring 8 are mutually welded through argon arc welding to obtain a connecting body of the fifth section 7 of the flame tube and the rear ring 8,
the head end of the fifth section 7 of the flame tube in the connecting body and the tail end of the fourth section 6 of the flame tube are mutually welded through resistance welding,
orifices for adjusting the air flow in the flame tube are arranged on the fourth section 6 and the fifth section 7 of the flame tube.
Compared with the prior art, the processing method has the advantages that the processing method in the prior art is generally assembled by welding from the head end to the tail end or from the tail end to the head end layer by layer: when the fifth section 7 of the flame tube and the rear ring 8 are assembled layer by layer, the fifth section and the rear ring are welded into a whole through argon arc welding in advance, and then the connector is assembled in place through an assembly tool and then is welded through electric resistance welding, so that the problem of poor coaxiality of the tube body caused by large welding deformation of the last layer of argon arc welding is solved.
During welding assembly, the neck ring 1, the front ring 2, the first section 3 of the flame tube, the second section 4 of the flame tube, the third section 5 of the flame tube, the fourth section 6 of the flame tube, the fifth section 7 of the flame tube and the rear ring 8 are sleeved in the assembly device to be assembled and corrected, so that the parallelism and the coaxiality of all parts are guaranteed.
As shown in fig. 11, the assembling device includes a base 9, a mandrel 10, and a plurality of positioning discs, wherein the base 9 is in an inverted T shape, a horizontal section of the base 9 is at the bottom, a vertical section of the base 9 is at the top, the horizontal section of the base 9 is fixedly connected with a machine tool, the mandrel 10 is vertically arranged, the mandrel 10 is in a column shape, the mandrel 10 is coaxially arranged with the vertical section of the base 9, and the lower end of the mandrel 10 is fixedly connected with the base 9, the diameter of the mandrel 10 is gradually increased from top to bottom, and a plurality of bosses are axially arranged along the circumference of the mandrel 10, when each boss is used for assembling each ring, the coaxiality of each ring is ensured, the plurality of positioning discs are in a disc shape, a positioning hole is formed in the central position of each positioning disc, each positioning hole is used for the mandrel 10 to extend into, and is matched with the boss of the mandrel 10 to measure and correct the assembling degree of the corresponding component.
The lower border of each positioning disk inwards caves in and forms the circular shape constant head tank, and the horizontal segment of each constant head tank is used for taking on the part that is located corresponding the positioning disk downside to detect the depth of parallelism of downside part, the vertical section of each constant head tank is used for downside part outside edge to stretch into, and laminate each other with the inner wall of downside part, so that detect the axiality of downside part.
The mandrel 10 is provided with six bosses, which are a first boss 11, a second boss 12, a third boss 13, a fourth boss 14, a fifth boss 15 and a sixth boss 16 from bottom to top in sequence, the positioning disks are six, which are a first positioning disk 20, a second positioning disk 21, a third positioning disk 22, a fourth positioning disk 23, a fifth positioning disk 24 and a sixth positioning disk 25 from bottom to top in sequence, the first positioning disk 20, the second positioning disk 21, the third positioning disk 22, the fourth positioning disk 23, the fifth positioning disk 24 and the sixth positioning disk 25 are arranged in sequence corresponding to the first boss 11, the second boss 12, the third boss 13, the fourth boss 14, the fifth boss 15 and the sixth boss 16, and the first boss 11, the second boss 12, the third boss 13, the fourth boss 14, the fifth boss 15 and the sixth boss 16 are respectively used for clamping the first positioning disk 20, the second positioning disk 21, the third positioning disk 22, A fourth puck 23, a fifth puck 24, and a sixth puck 25.
The last border of the locating hole of each positioning disk inwards contracts to form an inner border, so that each locating hole is big end to end, the inner border of the locating hole is used for being clamped on the boss of the mandrel 10, and then the positioning disk is clamped on the relative boss of the mandrel 10.
As shown in fig. 11, the assembly quality still includes neck dish 17, neck dish 17 is circular, neck dish 17's one end opening is big, the other end opening is little, neck dish 17's lateral wall outwards protrudes gradually from bottom to top and then laminates with neck ring 1's head end inner wall profile, spacing hole has been seted up to neck dish 17's centre, spacing hole is used for the vertical section of base 9 to stretch into, the vertical section of base 9 is used for blocking neck dish 17, make neck ring 1's head end card peripheral at neck dish 17 outer wall, and then fix and weld other parts in proper order.
When the gas turbine flame tube is processed, the use method of the assembling device comprises the following steps:
one end of the smaller opening of the neck disc 17 is sleeved outside the vertical section of the base 9,
the head end of the neck ring 1 is telescoped down over the outside of the neck disk 17,
the first positioning disk 20 is sleeved into the positioning hole of the mandrel 10 and clamped on the first boss 11, so that the positioning groove of the first positioning disk 20 is overlapped on the tail end of the front ring 2,
when the parallelism and the coaxiality of the first positioning disk 20, the mandrel 10 and the front ring 2 are consistent, the first positioning disk 20 is removed, the head end of the first section 3 of the flame tube is sleeved into the tail end of the front ring 2, the head end of the first section 3 of the flame tube is welded with the tail end of the front ring 2,
the second positioning disk 21 is sleeved into the positioning hole of the mandrel 10 and clamped on the second boss 12, so that the positioning groove of the second positioning disk 21 is lapped at the tail end of the first section 3 of the flame tube,
when the parallelism and the coaxiality of the second positioning plate 21, the mandrel 10 and the first section 3 of the flame tube are consistent, the second positioning plate 21 is removed, the head end of the second section 4 of the flame tube is sleeved into the tail end of the first section 3 of the flame tube, the head end of the second section 4 of the flame tube is welded with the tail end of the first section 3 of the flame tube,
the third positioning plate 22 is sleeved into the positioning hole of the mandrel 10 and clamped on the third boss 13, so that the positioning groove of the third positioning plate 22 is lapped at the tail end of the second section 4 of the flame tube,
when the parallelism and the coaxiality of the third positioning plate 22, the mandrel 10 and the second section 4 of the flame tube are consistent, the third positioning plate 22 is removed, the head end of the third section 5 of the flame tube is sleeved into the tail end of the second section 4 of the flame tube, the head end of the third section 5 of the flame tube is welded with the tail end of the second section 4 of the flame tube,
the fourth positioning disk 23 is sleeved into the positioning hole of the mandrel 10 and clamped on the fourth boss 14, so that the positioning groove of the fourth positioning disk 23 is lapped at the tail end of the third section 5 of the flame tube,
when the parallelism and the coaxiality of the fourth positioning plate 23, the mandrel 10 and the third section 5 of the flame tube are consistent, the fourth positioning plate 23 is removed, the head end of the fourth section 6 of the flame tube is sleeved into the tail end of the third section 5 of the flame tube, the head end of the fourth section 6 of the flame tube is welded with the tail end of the third section 5 of the flame tube,
the fifth positioning disk 24 is sleeved into the positioning hole of the mandrel 10 and clamped on the fifth boss 15, so that the positioning groove of the fifth positioning disk 24 is lapped at the tail end of the fourth section 6 of the flame tube,
when the parallelism and the coaxiality of the fifth positioning plate 24, the mandrel 10 and the fourth section 6 of the flame tube are consistent, the fifth positioning plate 24 is removed, the head end of the fifth section 7 of the flame tube is sleeved into the tail end of the fourth section 6 of the flame tube, the head end of the fifth section 7 of the flame tube is welded with the tail end of the fourth section 6 of the flame tube,
and sleeving the sixth positioning disk 25 into the positioning hole of the mandrel 10 and clamping the sixth positioning disk on the sixth boss 16, so that the positioning groove of the sixth positioning disk 25 is overlapped at the tail end of the rear ring 8, and finishing assembly when the parallelism and the coaxiality of the sixth positioning disk 25, the mandrel 10 and the rear ring 8 are consistent.
As shown in fig. 4, the first flame tube section 3, the second flame tube section 4, the third flame tube section 5, the fourth flame tube section 6 and the fifth flame tube section 7 are axially formed by a front tube ring 46 with a wave-shaped outer wall and a rear tube ring 47 with a conical outer wall, the front tube ring 46 is obtained by turning, wire cutting and polishing, the rear tube ring 47 is subjected to wire cutting, wire rolling and welding, the front tube ring 46 and the rear tube ring 47 are welded with each other by argon arc welding to obtain tube rings, the tube rings are placed into a furnace to remove stress after welding is completed, welding seams are polished, and the polished tube rings are assembled on a tool again to perform electric spark drilling. In the prior art, all sections of the flame tube obtained by split stamping or spinning forming are welded and formed, and then all the sections are assembled and welded, the welding seam of the cylindrical section of the flame tube obtained in the prior art is along the direction from the head end to the tail end of each section of the flame tube, the cylindricity and the assembly requirement of the cylindrical section of the flame tube are difficult to guarantee, so that the performance of the flame tube is influenced, the welding seam is arranged around a tube ring, and the flame tube is obtained by processing layer by layer through a tube ring device.
After the front cylinder ring 46 and the rear cylinder ring 47 are obtained by machining, the front cylinder ring 46 and the rear cylinder ring 47 are assembled on the cylinder ring device, so that the tail end of the front cylinder ring 46 is in contact with the head end of the rear cylinder ring 47, and then the tail end of the front cylinder ring 46 and the head end of the rear cylinder ring 47 are welded to respectively obtain the first flame tube section 3, the second flame tube section 4, the third flame tube section 5, the fourth flame tube section 6 and the fifth flame tube section 7.
As shown in fig. 10 and 5, the outer wall of the cylinder ring device is fitted to the inner wall profile of each cylinder ring, the structure of the cylinder ring device is very similar to that of the connecting device, the cylinder ring device comprises a left support body 48, a middle support body 49 and a right support body 50 which are arc-shaped, two ends of the left support body 48, the middle support body 49 and the right support body 50 are sequentially spliced to form a hollow circular cylinder ring device, and the cylinder ring device is used for sleeving the front cylinder ring 46 and the rear cylinder ring 47 on the outer wall of the cylinder ring device, so that the tail end of the front cylinder ring 46 and the head end of the rear cylinder ring 47 are conveniently welded.
The ends, close to the arc centers, of the left support body 48, the middle support body 49 and the right support body 50 are support inner ends 51, the ends, far away from the arc centers, of the left support body 48, the middle support body 49 and the right support body 50 are support outer ends 52, the support inner ends 51 of the left support body 48, the middle support body 49 and the right support body 50 are inwards sunken along two axial edges to form support fixing grooves 53, and each support fixing groove 53 is used for fixing the left support body 48, the middle support body 49 and the right support body 50 to form a hollow circular cylinder ring device.
As shown in fig. 5, the cylinder ring device further includes a cover plate 54, the cover plate 54 is annular, and the cover plate 54 is used for fixing the left support 48, the middle support 49 and the right support 50 in an annular support fixing groove 53 formed by sequentially splicing the left support 48, the middle support 49 and the right support 50 by bolts, so as to splice the left support 48, the middle support 49 and the right support 50 into an annular cylinder ring device.
The number of the cover plates 54 is two, the two cover plates 54 are used for being fixed in two support fixing grooves 53 formed by inwards recessing the inner ends of the left support body 48, the middle support body 49 and the right support body 50 along the two axial edges, and the joint positions of the left support body 48 and the middle support body 49 and the joint positions of the right support body 50 and the middle support body 49 are all set to be chamfers.
One end of the left support body 48, which is spliced with the right support body 50, is provided with a groove, one end of the right support body 50, which is spliced with the left support body 48, is provided with a triangular bulge, and the bulge and the groove are matched with each other, so that the left support body 48 and the right support body 50 are conveniently spliced.
As shown in fig. 2, the neck ring 1 is composed of a front ring 26 and a conical ring 27 integrally connected from the head end to the tail end, the diameter of the conical ring 27 is larger than that of the front ring 26, and then the neck ring 1 in a horn shape is formed, that is, the tail end of the front ring 26 is integrally connected with the head end of the conical ring 27, the two ends of the neck ring 1 are respectively the head end of the front ring 26 and the tail end of the conical ring 27, a fixing rib 28 is fixedly connected on the outer wall of the conical ring 27 from the front ring 26 to the conical ring 27, and the fixing rib 28 is used for supporting the front ring 2 and plays a role in rectification.
The neck ring 1 is processed by a processing apparatus, as shown in fig. 3, the processing apparatus includes: a front gland 29 and a rear gland 30, the front gland 29 is in a disc shape, the edge of one side of the front gland 29 is recessed inwards to form a head end groove 18, the head end groove 18 is used for the head end of the front ring 26 to extend into, so that the axis of the front ring 26 is coincident with the axis of the front gland 29, the rear gland 30 is in a disc shape, the rear gland 30 is arranged in parallel with the front gland 29, the edge of one side of the rear gland 30, which is close to the front gland 29, is in a slow slope shape from front to back, and forms a wedge-shaped groove 31, namely, the diameter of one side of the rear gland 30, which is close to the front gland 29, is the same as that of the front gland 29, the diameter of one side of the rear gland 30, which is far away from the front gland 29, is slightly larger than that of the front gland 29, and then a wedge-shaped groove 31 is formed by utilizing the inclined edge of the rear gland 30, the tail end of the cone ring 27 extends into, the front gland 29 and the rear gland 30 are arranged oppositely and matched with each other to clamp the neck ring 1, and then four-axis machining equipment mills processing to neck ring 1, and when processing, the four-jaw chuck of four-axis machining equipment is used for clamping and fixing the machining device, and then milling processing is carried out to neck ring 1.
The opposite side fixedly connected with support column 32 of back gland 30, support column 32 is the column, the axis of support column 32 and the coincidence of the axis of back gland 30, support column 32 is used for four-jaw chuck of four-axis machining equipment to carry out the centre gripping to it, and then fix processingequipment, run through on the preceding gland 29 and seted up preceding through-hole, run through on the back gland 30 and seted up the back through-hole, preceding through-hole and back through-hole all are used for clamping screw 40 to pass, will preceding gland 29 in proper order, neck ring 1, back gland 30 is fixed.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent replacements, improvements, etc. within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A processing method of a front ring of a flame tube of a gas turbine is characterized in that the front ring (2) consists of a head ring (33) and a cone tube ring (34) which are welded with each other from the head end to the tail end, the head ring (33) is of an annular structure with a small inlet and a large outlet, an opening at one end of the head ring (33) close to the cone tube ring (34) is large, a plurality of through holes are formed in the side wall of the head ring (33) in a penetrating manner and used for adjusting air flow, the cone tube ring (34) is of an annular structure with a large inlet and a small outlet, an opening at one end of the cone tube ring (34) close to the head ring (33) is large,
the processing method of the front ring (2) comprises the following steps:
a conical ring with a structure similar to that of the head ring (33) is manufactured by a lathe,
an anti-folding groove is arranged on the side wall of the conical ring close to the larger side of the opening and around the conical ring,
placing the conical ring on a stamping die, so that a punch (36) attached to the profile of the inner wall of the head ring (33) stamps the conical ring to obtain a head ring body,
the head annular body is sleeved on the periphery of the punch (36), the smaller end of the head annular body is cut by a lathe, so that the structure of the smaller end of the head annular body is the same as that of the head end of the head ring (33),
fixing the head annular body on a cutting device, cutting the larger end of the head annular body by using a cutting machine, cutting off the folded part of the larger end to ensure that the structure of the end with the larger opening of the head annular body is the same as the tail end of the head ring (33), further obtaining the head ring (33),
then a conical cylinder ring (34) is obtained by rolling and molding a metal plate,
sleeving the head ring (33) and the conical cylinder ring (34) on the outer side of the connecting device and coaxially arranging the head ring and the connecting device, so that the tail end of the head ring (33) is contacted with the head end of the conical cylinder ring (34), and then welding the tail end of the head ring (33) and the head end of the conical cylinder ring (34) to obtain the front ring (2).
2. The method for processing the front ring of the gas turbine combustor basket according to claim 1, wherein the stamping die comprises a lower cylindrical female die (35) and an upper punch (36), and the concave structure of the cylindrical female die (35) and the lower part of the punch (36) cooperate with each other to stamp the conical ring, so that the conical ring is stamped by the punch (36) and then forms a head ring body with the same concave structure as the cylindrical female die (35).
3. The method of claim 1, wherein the step of machining the front ring of the combustor basket of the gas turbine further comprises the step of machining the front ring of the combustor basket of the gas turbine, the cutting device comprises a circular baffle plate (37) and a pressing block (38), the baffle plate (37) and the pressing block (38) are coaxially arranged and are mutually fixed through bolts, the outer wall of the baffle plate (37) is used for being sleeved at the end with the smaller opening of the head annular body, the baffle plate (37) is circular, the outer wall of the baffle plate gradually protrudes outwards to be attached to the profile of the inner wall of the end with the smaller opening of the head annular body, the diameter of the pressing block (38) is larger than the diameter of the baffle plate (37) and the smaller end of the opening of the head annular body, one side of the pressing block (38) close to the baffle (37) is used for abutting the end with the smaller opening of the head annular body on the side wall of the pressing block, and then the baffle (37) and the pressing block (38) fix the head annular body, so that the larger end of the head annular body is conveniently cut.
4. A method for manufacturing a front ring of a gas turbine liner according to claim 2 or 3, wherein the outer wall of the connection device is in profile contact with the inner wall of the front ring (2),
the connecting device comprises a left arc-shaped assembling body (39), a middle assembling body and a right arc-shaped assembling body (41), the two ends of the left arc-shaped assembling body (39), the middle arc-shaped assembling body and the right arc-shaped assembling body (41) are sequentially spliced to form a hollow circular connecting device, the connecting device is used for sleeving the head ring (33) and the cone cylinder ring (34) on the outer wall of the connecting device, the tail end of the head ring (33) and the head end of the cone cylinder ring (34) which are in contact with each other are conveniently welded,
the left side is joined in marriage the one end of dress body (39), well dress body and right dress body (41) and is close to its arc center and for joining in marriage inner end (42), and the one end of keeping away from the arc center is for joining in marriage dress outer end (43), the dress inner end (42) of joining in marriage of left side dress body (39), well dress body and right dress body (41) inwards caves in along axial two borders and forms and joins in marriage dress fixed slot (44), each join in marriage dress fixed slot (44) and be used for joining in marriage dress body (39), well dress body and right dress body (41) and fix and form the annular connecting device of cavity.
5. The method of claim 4, wherein the attachment device further comprises: a sealing plate (45) is arranged on the upper surface of the shell,
the sealing plate (45) is annular, the sealing plate (45) is used for fixing the sealing plate in a circular assembling fixing groove (44) formed by sequentially splicing the left assembling body (39), the middle assembling body and the right assembling body (41) through bolts, and then the left assembling body (39), the middle assembling body and the right assembling body (41) are spliced into a circular connecting device.
6. The method for manufacturing the front ring of the combustor basket of the gas turbine as claimed in claim 5, wherein two sealing plates (45) are provided, and two sealing plates (45) are used to be fixed in two fitting fixing grooves (44) formed by inward recessing of two edges of the inner ends of the left fitting body (39), the middle fitting body and the right fitting body (41) along the axial direction.
7. The processing method of the front ring of the gas turbine combustor basket according to claim 6, wherein the joints where the left fitting body (39) and the middle fitting body are spliced and where the right fitting body (41) and the middle fitting body are spliced are provided with chamfers.
8. The processing method of the front ring of the gas turbine flame tube as claimed in claim 7, wherein a groove is formed at the end of the left fitting body (39) spliced with the right fitting body (41), a triangular protrusion is formed at the end of the right fitting body (41) spliced with the left fitting body (39), and the protrusion and the groove are matched with each other, so that the left fitting body (39) and the right fitting body (41) are conveniently spliced.
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Cited By (1)
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| CN115229437A (en) * | 2022-07-04 | 2022-10-25 | 西北稀有金属材料研究院宁夏有限公司 | Rotary extrusion forming steel sheath end cover processing method and corresponding die and cutter |
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