CN113263299B - Method for processing cylindrical section of flame tube of gas turbine - Google Patents
Method for processing cylindrical section of flame tube of gas turbine Download PDFInfo
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- CN113263299B CN113263299B CN202110686789.0A CN202110686789A CN113263299B CN 113263299 B CN113263299 B CN 113263299B CN 202110686789 A CN202110686789 A CN 202110686789A CN 113263299 B CN113263299 B CN 113263299B
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- 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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Abstract
The invention discloses a processing method of a cylindrical section of a flame tube of a gas turbine, which comprises the following steps: the method comprises the following steps that a front cylinder ring is machined by a lathe, then is cut by a wire and then is polished, a rear cylinder ring is cut by a wire, then is rolled and welded, the front cylinder ring and the rear cylinder ring are welded with each other through argon arc welding to sequentially obtain a first flame tube section, a second flame tube section, a third flame tube section, a fourth flame tube section and a fifth flame tube section, after welding is completed, the flame tube is placed into a furnace to remove stress, then a welding seam is polished, and all the polished flame tube sections are reassembled on a tool to be subjected to electric spark punching; the processing method of the invention effectively ensures the consistency of the size of the lap joint part, so that each section of the flame tube reaches an ideal welding gap after being assembled; meanwhile, the shape correction of the size of the opening part is avoided, so that the integral assembly precision and the welding strength are ensured.
Description
Technical Field
The invention belongs to the field of peripheral parts of gas turbines, and particularly relates to a method for processing a cylindrical section 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.
Because the cylindrical section of the flame tube in the prior art is mostly formed by split stamping or spinning, the size difference of two ports of the flame tube is large, an ideal gap required by resistance welding is difficult to achieve during assembly welding, the splashing condition is serious, the welding strength is influenced, and the coaxiality of each section is greatly influenced after the integral assembly is finished.
Disclosure of Invention
The invention aims to provide a method for processing a cylindrical section of a flame tube of a gas turbine, which aims to solve the problem that the coaxiality of each section is poor after assembly when the sizes of two ports of each section of the cylindrical section of the flame tube are different greatly.
The invention adopts the following technical scheme: a processing method of a cylindrical section of a flame tube of a gas turbine is characterized in that the flame tube is sequentially arranged coaxially from the head end to the tail end and is annular: a neck ring, a front ring, a first section of a flame tube, a second section of the flame tube, a third section of the flame tube, a fourth section of the flame tube, a fifth section of the flame tube and a rear ring,
the first section of the flame tube, the second section of the flame tube, the third section of the flame tube, the fourth section of the flame tube and the fifth section of the flame tube are respectively composed of a front tube ring with a wave-shaped outer wall and a back tube ring with a conical outer wall from the head end to the tail end along the axial direction,
the processing method comprises the following steps:
the front cylinder ring is obtained by turning, cutting by a wire and then polishing,
the rear cylinder ring is firstly subjected to line cutting, then is rolled and welded,
welding the front cylinder ring and the rear cylinder ring with argon arc welding to obtain a first flame tube section, a second flame tube section, a third flame tube section, a fourth flame tube section and a fifth flame tube section in sequence, putting the flame tubes into a furnace to remove stress after welding is finished, polishing welding seams, reassembling each section of the polished flame tubes on a tool to perform electric spark punching,
after the front cylinder ring and the rear cylinder ring are obtained through machining, the front cylinder ring and the rear cylinder ring are assembled on the cylinder ring device, the tail end of the front cylinder ring is in contact with the head end of the rear cylinder ring, and then the tail end of the front cylinder ring and the head end of the rear cylinder ring are welded to obtain a first flame cylinder section, a second flame cylinder section, a third flame cylinder section, a fourth flame cylinder section and a fifth flame cylinder section respectively.
Furthermore, the outer wall of the cylinder ring device is jointed with the inner wall profiles of the sections of the flame cylinder,
the cylinder ring device comprises a left support body, a middle support body and a right support body which are arc-shaped, two ends of the left support body, the middle support body and the right support body are sequentially spliced to form a hollow circular cylinder ring device, the cylinder ring device is used for sleeving a front cylinder ring and a rear cylinder ring on the outer wall of the cylinder ring device, the tail end of the front cylinder ring and the head end of the rear cylinder ring are conveniently welded,
the ends of the left support body, the middle support body and the right support body close to the arc center are support inner ends, the ends far away from the arc center are support outer ends,
the left support body, the middle support body and the right support body support the inner ends and inwards recess along two axial edges to form support fixing grooves, and each support fixing groove is used for fixing the left support body, the middle support body and the right support body to form a hollow circular ring-shaped cylinder ring device.
Further, still include: a cover plate is arranged on the upper surface of the shell,
the cover plate is annular and is fixed in a supporting fixing groove formed by sequentially splicing the left support body, the middle support body and the right support body through bolts, and then the left support body, the middle support body and the right support body are spliced into an annular cylinder ring device.
Furthermore, the number of the cover plates is two, and the two cover plates are used for being respectively fixed in two support fixing grooves formed by inwards sinking two axial edges of the inner ends of the left support body, the middle support body and the right support body.
Furthermore, the mutual splicing positions of the left support body and the middle support body and the right support body and the middle support body are provided with chamfers.
Furthermore, a groove is formed in one end, spliced with the right support body, of the left support body, a triangular protrusion is formed in one end, spliced with the left support body, of the right support body, and the protrusion is matched with the groove, so that the left support body and the right support body can be conveniently spliced.
The invention has the beneficial effects that: the processing method of the invention effectively ensures the consistency of the size of the lap joint part, so that each section of the flame tube reaches an ideal welding gap after being assembled; meanwhile, the shape correction of the size of the opening part is avoided, so that the integral assembly precision and the welding strength are ensured.
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 view of a cylindrical section 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 cylindrical section of a flame tube of a gas turbine, as shown in figure 4, a first section 3 of the flame tube, a second section 4 of the flame tube, a third section 5 of the flame tube, a fourth section 6 of the flame tube and a fifth section 7 of the flame tube are all composed of a front tube ring 46 with a wave-shaped bent outer wall and a rear tube ring 47 with a conical outer wall along the axial direction, the front tube ring 46 is processed by turning, then is cut by a wire and then is polished, the rear tube ring 47 is firstly cut by a wire, then is rolled and welded, finally the front tube ring 46 and the rear tube ring 47 are mutually welded by argon arc welding to obtain each section of the flame tube, after welding is finished, the flame tube enters a furnace to remove stress, then is polished, and each section of the polished flame tube is reassembled on a tool to carry out electric spark drilling. In the prior art, all sections of a 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 each section of the flame tube, and the flame tube is obtained by layer-by-layer processing 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 cylindrical ring device is fitted to the inner wall profiles of the sections of the flame tube, the structure of the cylindrical ring device is very similar to that of the connecting device, the cylindrical 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 cylindrical ring device, and the cylindrical ring device is used for sleeving the front cylindrical ring 46 and the rear cylindrical ring 47 on the outer wall of the cylindrical ring device, so that the tail end of the front cylindrical ring 46 and the head end of the rear cylindrical 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. 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 location platform, and the horizontal segment of each location platform is used for taking on the part that is located corresponding positioning disk downside to detect the depth of parallelism of downside part, the vertical section of each location platform is used for downside part outside edge to stretch into, and laminates 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 table 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 table 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 table 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 plate 23 is sleeved into the positioning hole of the mandrel 10 and clamped on the fourth boss 14, so that the positioning table of the fourth positioning plate 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 table 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 table 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. 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.
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 head end diameter and a large tail end diameter, and one end of the head ring close to the cone 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, the through holes are used for adjusting air flow, the cone ring 34 is an annular structure with a large head end diameter and a small tail end diameter, and one end of the cone ring close to the head ring 33 is the head end, and the diameter of the tail end of the cone 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.
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 (6)
1. The utility model provides a processing method of gas turbine flame tube cylinder section, its characterized in that, the flame tube is by coaxial setting and all be annular from the head end to the tail end in proper order: a neck ring (1), a front ring (2), a first section of a flame tube (3), a second section of the flame tube (4), a third section of the flame tube (5), a fourth section of the flame tube (6), a fifth section of the flame tube (7) and a rear ring (8),
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 and the fifth section (7) of the flame tube are respectively composed of a front tube ring (46) with a wave-shaped bent outer wall and a rear tube ring (47) with a conical outer wall from the head end to the tail end along the axial direction,
the processing method comprises the following steps:
the front cylinder ring (46) is obtained by turning, cutting by a wire and then grinding,
the rear cylinder ring (47) is firstly subjected to line cutting, then is rolled and welded,
the front cylinder ring (46) and the rear cylinder ring (47) are mutually welded through argon arc welding to obtain a first flame tube section (3), a second flame tube section (4), a third flame tube section (5), a fourth flame tube section (6) and a fifth flame tube section (7) in sequence, after welding is finished, the flame tubes are put into a furnace to remove stress, then welding seams are polished, all the polished flame tube sections are reassembled on a tool to carry out electric spark punching,
after a front cylinder ring (46) and a rear cylinder ring (47) are obtained through machining, the front cylinder ring (46) and the rear cylinder ring (47) are assembled on a 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 a first flame cylinder section (3), a second flame cylinder section (4), a third flame cylinder section (5), a fourth flame cylinder section (6) and a fifth flame cylinder section (7).
2. The method of claim 1, wherein the outer wall of the collar assembly is adapted to the inner wall profile of each segment of the liner,
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, the 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, the cylinder ring device is used for sleeving a front cylinder ring (46) and a rear cylinder ring (47) on the outer wall of the cylinder ring device, the tail end of the front cylinder ring (46) and the head end of the rear cylinder ring (47) are conveniently welded,
the ends of the left support body (48), the middle support body (49) and the right support body (50) close to the arc center are support inner ends (51), the ends far away from the arc center are support outer ends (52),
the left support body (48), the middle support body (49) and the right support body (50) are characterized in that support inner ends (51) are inwards recessed 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-ring-shaped cylinder ring device.
3. The method of claim 2, further comprising: a cover plate (54) is arranged on the upper surface of the base plate,
the cover plate (54) is annular, the cover plate (54) is fixed in a supporting fixing groove (53) which is formed by sequentially splicing the left supporting body (48), the middle supporting body (49) and the right supporting body (50) through bolts, and then the left supporting body (48), the middle supporting body (49) and the right supporting body (50) are spliced into an annular cylinder ring device.
4. The method for processing the cylindrical section of the flame tube of the gas turbine as claimed in claim 3, wherein two cover plates (54) are provided, and the two cover plates (54) are respectively fixed on the inner ends of the left support body (48), the middle support body (49) and the right support body (50) and are inwards recessed along two axial edges to form two support fixing grooves (53).
5. The method for processing the cylindrical section of the liner of the gas turbine as claimed in any one of claims 2 to 4, wherein the joints of the left support body (48) and the middle support body (49) and the joints of the right support body (50) and the middle support body (49) are chamfered.
6. The processing method of the gas turbine liner cylinder section as claimed in claim 5, wherein a groove is formed in the end of the left support body (48) spliced with the right support body (50), a triangular protrusion is formed in the end of the right support body (50) spliced with the left support body (48), and the protrusion and the groove are matched with each other, so that the left support body (48) and the right support body (50) can be conveniently spliced.
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| JPS6082281A (en) * | 1983-10-07 | 1985-05-10 | Agency Of Ind Science & Technol | Production of combustor for gas turbine |
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| CN209954070U (en) * | 2019-03-18 | 2020-01-17 | 辽宁福鞍燃气轮机有限公司 | Assembly welding tool for flame tube of combustion chamber of gas turbine |
| CN212577908U (en) * | 2020-06-28 | 2021-02-23 | 辽宁福鞍燃气轮机有限公司 | Gas turbine flame tube assembly positioning and welding tool |
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2021
- 2021-06-21 CN CN202110686789.0A patent/CN113263299B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6082281A (en) * | 1983-10-07 | 1985-05-10 | Agency Of Ind Science & Technol | Production of combustor for gas turbine |
| CN103481039A (en) * | 2013-09-29 | 2014-01-01 | 北京动力机械研究所 | Method for producing aviation gas turbine engine combustion chamber burner inner liner |
| CN104315542A (en) * | 2014-10-28 | 2015-01-28 | 常州兰翔机械有限责任公司 | Flame tube of gas turbine engine and processing method of flame tube |
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