Laser drilling tool for combustion chamber of gas turbine

Abstract

The utility model discloses a laser drilling tool for a combustion chamber of a gas turbine, and belongs to the field of laser beam machining equipment. Comprising a laser, the laser is connected with a sliding rail which is vertically arranged, and a supporting table is fixed below the sliding rail. A rotating assembly is rotationally arranged on the supporting table and comprises a rotating disc, a driving device and a jacking device, a vertical pipe is coaxially fixed to the upper portion of the rotating disc, and the vertical pipe and the sliding rail are arranged in parallel in a spaced mode. The vertical pipe is sleeved with the jacking device, the jacking device is used for supporting the inner wall of the combustion chamber shell, the transmitting end of the laser device faces the combustion chamber shell, and the driving device is fixed to the lower portion of the supporting table and drives the rotary disc to rotate. According to the punching device, the combustion chamber shell which is bent to be cylindrical can be punched, the advantages of laser punching are fully played, bending operation is not needed after punching, and then the qualified rate is increased.

Description

Technical Field

[0001] The present application belongs to the field of laser beam processing equipment, and specifically relates to a laser drilling tool for a gas turbine combustion chamber. Background Art

[0002] Laser drilling can achieve extremely high positioning accuracy and aperture size control, and can process small and complex hole shapes, which is suitable for precision manufacturing needs. And because there is no physical contact between the laser beam and the material, it avoids tool wear and mechanical stress on the workpiece, reduces the possibility of deformation, and is particularly suitable for processing fragile or soft materials. Therefore, more and more precision parts are punched by laser.

[0003] The existing gas turbine combustion chamber casing is also punched by laser, but due to the limitation of existing laser punching machines, the flat plate used to make the combustion chamber casing is punched, and then the plate is bent to form a cylindrical structure. During the bending process, the punched area is easily deformed, which reduces the qualified product rate. Utility Model Content

[0004] The technical problem to be solved by the present application is: to overcome the deficiencies of the prior art and to provide a laser drilling tool for a gas turbine combustion chamber. The present application can drill holes in a combustion chamber shell that is bent into a cylindrical shape, giving full play to the advantages of laser drilling. No bending operation is required after drilling, thereby improving the qualified product rate.

[0005] The technical solution adopted by this application to solve the existing problems is:

[0006] A gas turbine combustion chamber laser drilling tool comprises a laser, wherein the laser is connected to a vertically arranged slide rail, and a support platform is fixed below the slide rail.

[0007] A rotating assembly is rotatably arranged on the support platform, and the rotating assembly includes a turntable, a driving device and a supporting device. A vertical pipe is coaxially fixed above the turntable, and the vertical pipe is arranged parallel to the slide rail at intervals.

[0008] The supporting device is sleeved on the vertical pipe and is used to support the inner wall of the combustion chamber shell. The emitting end of the laser faces the combustion chamber shell. The driving device is fixed under the supporting platform and drives the turntable to rotate.

[0009] Preferably, the turntable is rotatably arranged above the support platform, a limiting ring is convexly provided on the bottom of the turntable, an annular groove is concavely provided on the top surface of the support platform, and the limiting ring is rotatably arranged inside the groove.

[0010] Preferably, a passive wheel is coaxially fixed below the turntable, and the output shaft of the driving device is provided with a driving wheel, and the driving wheel drives the passive wheel to rotate.

[0011] Preferably, the passive wheel and the active wheel are connected via a transmission member.

[0012] Preferably, the support platform is provided with an insertion hole, and the bottom of the riser passes through the insertion hole and is coaxially fixedly connected with the passive wheel.

[0013] Preferably, the stand pipe below the support platform is provided with two spaced-apart clamping rings, a through hole is provided on the circumferential surface of the stand pipe between the two clamping rings, a sleeve is sleeved on the stand pipe between the two clamping rings, the sleeve is rotatably connected to the stand pipe, and a negative pressure pipe is connected to the outside of the sleeve. A plurality of holes are provided on the circumferential surface of the stand pipe above the support platform.

[0014] Preferably, the hole on the circumferential surface of the vertical pipe above the support platform is a threaded hole, the supporting device is slidably connected to the vertical pipe, and the supporting device is provided with a fastening bolt, which is threadedly connected to the threaded hole.

[0015] Preferably, the supporting device comprises a sliding tube, a plurality of horizontally arranged threaded tubes are fixed to the outer wall of the sliding tube, and the threaded tubes are coaxially threadedly connected with a screw rod.

[0016] Preferably, a spherical top is provided at one end of the screw rod facing away from the slide tube, and a rotating handle is coaxially fixed on the screw rod.

[0017] Preferably, a protrusion is convexly provided on the inner wall of the sliding tube, a groove is concavely provided on the outer wall of the vertical tube, and the protrusion is slidably arranged inside the groove.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] (1) Punching holes in the cylindrical combustion chamber shell eliminates the need for bending operations, thereby increasing the yield rate.

[0020] (2) The gaseous metal or solid metal particle powder generated during the laser drilling process will be extracted through the negative pressure suction system and processed centrally to avoid pollution to the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 This is a structural diagram of a gas turbine combustion chamber laser drilling tool installed in the combustion chamber shell.

[0023] Figure 2 for Figure 1 Right view of

[0024] Figure 3 for Figure 1 Partial cross-sectional view of the combustion chamber casing.

[0025] Figure 4 This is a structure diagram of a gas turbine combustion chamber laser drilling tool for this application.

[0026] Figure 5 This is a structural diagram of a rotating assembly in a gas turbine combustion chamber laser drilling tool for this application.

[0027] Figure 6 for Figure 5 Sectional view,

[0028] Figure 7 This is a structural diagram of a top support device in a gas turbine combustion chamber laser drilling tool for this application.

[0029] Figure 8 This is a structural diagram of a support platform in a gas turbine combustion chamber laser drilling tool for the present application.

[0030] In the figure: 1-turntable, 101-limiting ring, 2-passive wheel, 3-vertical pipe, 301-groove, 302-threaded hole, 303-clamping ring, 304-through hole, 4-casing, 5-negative pressure tube, 6-sliding tube, 601-bump, 7-threaded tube, 8-screw, 801-head, 802-turn handle, 9-fastening bolt, 10-support platform, 1001-through hole, 1002-cage, 11-transmission member, 12-driving wheel, 13-driving device, 14-tube clamp, 15-slide rail, 16-laser, 17-combustion chamber shell. DETAILED DESCRIPTION

[0031] The accompanying drawings are the best embodiments of the gas turbine combustion chamber laser drilling tool. The present application will be further described in detail below in conjunction with the accompanying drawings.

[0032] Depend on Figure 4 As shown, a gas turbine combustion chamber laser drilling tool includes a laser 16, which is connected to a vertically arranged slide rail 15. A support platform 10 is fixed below the slide rail 15. The slide rail 15 adopts a linear electric module, and the laser 16 is fixedly connected to the sliding part of the slide rail 15 through a bracket.

[0033] The laser 16 is prior art, including the laser source, optical system and nozzle in the auxiliary gas system of the laser drilling machine. The control system and cooling system in the laser drilling machine are arranged outside the support platform 10, which are all prior art and therefore will not be elaborated in detail in the specific implementation manner.

[0034] The support platform 10 is provided with a rotating assembly, which includes a turntable 1, a driving device 13 and a supporting device. Figure 5 as well as Figure 6 As shown, a vertical pipe 3 is coaxially fixed above the turntable 1, and the vertical pipe 3 is arranged parallel to the slide rail 15 at intervals.

[0035] The supporting device is sleeved on the vertical pipe 3, and is used to support the inner wall of the combustion chamber shell 17. The emission end of the laser 16 faces the combustion chamber shell 17. The driving device 13 is fixed under the supporting platform 10, and the driving device 13 drives the turntable 1 to rotate.

[0036] In this embodiment, the driving device 13 adopts a motor with a speed reduction mechanism, a passive wheel 2 is coaxially fixed below the turntable 1, and an output shaft of the driving device 13 is provided with a driving wheel 12, and the driving wheel 12 drives the passive wheel 2 to rotate.

[0037] In order to facilitate the layout and reasonably utilize the space, the passive wheel 2 and the driving wheel 12 are connected through a transmission member 11. Further, the passive wheel 2 and the driving wheel 12 use pulleys, and the transmission member 11 uses a synchronous belt. Alternatively, the passive wheel 2 and the driving wheel 12 use sprockets, and the transmission member 11 uses a chain.

[0038] During the laser drilling process, the auxiliary gas system will spray high-pressure gas, which can be oxygen, nitrogen, carbon dioxide, air, etc. The high-pressure gas is blown to the drilling area through the nozzle to help discharge the generated waste and cool the surrounding materials. The high-pressure gas blown through the drilling area carries gaseous metal or solid metal powder particles. In order to avoid its diffusion and pollution of the environment, a negative pressure suction function is added in this embodiment, and the specific arrangement is as follows:

[0039] The standpipe 3 located below the support platform 10 is provided with two spaced clamping rings 303, a through hole 304 is provided on the circumferential surface of the standpipe 3 located between the two clamping rings 303, a sleeve 4 is sleeved on the standpipe 3 located between the two clamping rings 303, and the sleeve 4 is rotatably connected to the standpipe 3. The inner wall of the sleeve 4 is spaced from the outer wall of the standpipe 3. A negative pressure pipe 5 is connected to the outside of the sleeve 4, and a negative pressure suction system is connected to the exhaust end of the negative pressure pipe 5, and the negative pressure suction system adopts the existing technology.

[0040] A plurality of holes are provided on the circumferential surface of the riser 3 located above the support platform 10. Under the action of negative pressure suction, the high-pressure gas mixed with metal impurities enters the interior of the riser 3 through the holes on the circumferential surface of the riser 3, then enters the cavity between the casing 4 and the riser 3 through the through hole 304, and then is discharged through the negative pressure pipe 5 for centralized treatment. In order to prevent the negative pressure pipe 5 from swinging, the negative pressure pipe 5 is fixedly connected to the support platform 10 through the pipe clamp 14.

[0041] Depend on Figure 7 As shown, the supporting device includes a sliding tube 6 , and a plurality of horizontally arranged threaded tubes 7 are fixed to the outer wall of the sliding tube 6 , and the threaded tubes 7 are distributed in a ring array around the axis of the sliding tube 6 .

[0042] The threaded tube 7 is coaxially threadedly connected with a screw rod 8. The end of the screw rod 8 facing away from the slide tube 6 is provided with a spherical head 801, and a rotating handle 802 is coaxially fixed on the screw rod 8. Figure 3 As shown, the combustion chamber housing 17 is placed on the support platform 10, the supporting device is located inside the combustion chamber housing 17, and the screw rod 8 is rotated to adjust the length of the screw rod extending out of the threaded tube 7, so that the head 801 abuts against the inner wall of the combustion chamber housing 17. The circumferential surface of the screw rod 8 is provided with scale lines arranged along its axial direction, so as to ensure that the relatively arranged screw rods 8 have the same extension length, so that the combustion chamber housing 17 and the vertical pipe 3 are arranged coaxially.

[0043] The supporting device can adjust the length of the screw rod 8 to support the combustion chamber shell 17 with different inner diameters. In order to improve the supporting effect, several supporting devices are slidably provided on the riser 3.

[0044] Since the holes punched on the outer wall of the combustion chamber housing 17 have different heights, the supporting device can slide up and down to prevent the head 801 from affecting the punching. The hole on the circumferential surface of the vertical pipe 3 above the support platform 10 is a threaded hole 302. The supporting device is slidably connected to the vertical pipe 3. The supporting device is provided with a fastening bolt 9, which is threadedly connected to the threaded hole 302. The sliding pipe 6 is also provided with a threaded hole, and the fastening bolt 9 is threadedly connected to the sliding pipe 6.

[0045] The threaded hole 302 has two functions, that is, it can be threadedly connected with the fastening bolt 9 to fix the sliding tube 6, and can also be used as a suction hole during the negative pressure suction process.

[0046] In order to enable the vertical tube 3 to rotate and drive the supporting device to rotate, the inner wall of the sliding tube 6 is provided with a protrusion 601 , and the outer wall of the vertical tube 3 is provided with a groove 301 , and the protrusion 601 is slidably arranged inside the groove 301 .

[0047] Depend on Figure 8 As shown, the turntable 1 is rotatably arranged above the support platform 10, a coaxially arranged limiting ring 101 is convexly provided on the bottom of the turntable 1, and an annular groove 1002 is concavely provided on the top surface of the support platform 10, and the limiting ring 101 is rotatably arranged inside the groove 1002.

[0048] The support platform 10 is provided with an insertion hole 1001 , and the bottom of the riser 3 passes through the insertion hole 1001 and is coaxially fixedly connected with the passive wheel 2 .

[0049] Depend on Figure 1 as well as Figure 2 As shown, when in use, the combustion chamber housing 17 is sleeved on the vertical pipe 3, and the height of the supporting device is adjusted according to the position of the hole punched inside the combustion chamber housing 17. After the supporting device is positioned, it is fixed by tightening the bolts 9. Then the screw rod 8 is rotated to make the head 801 abut against the inner wall of the combustion chamber housing 17. When adjusting the screw rod 8, observe the scale on the circumferential surface of the screw rod 8 to ensure that the length of the screw rod 8 of the same supporting device is the same, thereby ensuring that the combustion chamber housing 17 is concentric with the vertical pipe 3.

[0050] Then adjust the height of the laser 16 so that the laser beam and the opening are on the same horizontal plane. Turn on the laser 16 and the drive device 13 to perform laser drilling on a circle on the same horizontal plane of the combustion chamber shell 17. After completing one circle of drilling, adjust the height of the laser 16 and perform laser drilling on another horizontal plane.

[0051] The implementation methods of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above implementation methods, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A gas turbine combustion chamber laser drilling tool, comprising a laser (16), characterized in that: The laser (16) is connected to a vertically arranged slide rail (15), and a support platform (10) is fixed below the slide rail (15); A rotating assembly is rotatably provided on the support platform (10), the rotating assembly comprising a turntable (1), a driving device (13) and a supporting device, a vertical pipe (3) is coaxially fixed on the turntable (1), and the vertical pipe (3) and the slide rail (15) are arranged in parallel and at intervals; The supporting device is sleeved on the vertical pipe (3), and is used to support the inner wall of the combustion chamber shell (17). The emission end of the laser (16) faces the combustion chamber shell (17). The driving device (13) is fixed below the support platform (10), and the driving device (13) drives the turntable (1) to rotate.

2. A gas turbine combustion chamber laser drilling tool according to claim 1, characterized in that: The turntable (1) is rotatably arranged above the support platform (10), a limiting ring (101) is convexly provided on the bottom of the turntable (1), an annular clamping groove (1002) is concavely provided on the top surface of the support platform (10), and the limiting ring (101) is rotatably arranged inside the clamping groove (1002).

3. A gas turbine combustion chamber laser drilling tool according to claim 1, characterized in that: A passive wheel (2) is coaxially fixed below the rotating disk (1), and an output shaft of the driving device (13) is provided with a driving wheel (12), and the driving wheel (12) drives the passive wheel (2) to rotate.

4. A gas turbine combustion chamber laser drilling tool according to claim 3, characterized in that: The passive wheel (2) and the active wheel (12) are connected via a transmission member (11).

5. A gas turbine combustion chamber laser drilling tool according to claim 3 or 4, characterized in that: The support platform (10) is provided with an insertion hole (1001), and the bottom of the riser (3) passes through the insertion hole (1001) and is coaxially fixedly connected to the passive wheel (2).

6. A gas turbine combustion chamber laser drilling tool according to claim 5, characterized in that: The stand pipe (3) located below the support platform (10) is provided with two upper and lower spaced-apart clamping rings (303); a through hole (304) is provided on the circumferential surface of the stand pipe (3) located between the two clamping rings (303); a sleeve (4) is sleeved on the stand pipe (3) located between the two clamping rings (303); the sleeve (4) is rotatably connected to the stand pipe (3); and a negative pressure pipe (5) is connected to the outside of the sleeve (4); A plurality of holes are provided on the circumferential surface of the stand pipe (3) located above the support platform (10).

7. A gas turbine combustion chamber laser drilling tool according to claim 6, characterized in that: The hole on the circumferential surface of the vertical pipe (3) above the support platform (10) is a threaded hole (302), the supporting device is slidably connected to the vertical pipe (3), and a fastening bolt (9) is provided on the supporting device, and the fastening bolt (9) is threadedly connected to the threaded hole (302).

8. A gas turbine combustion chamber laser drilling tool according to claim 1 or 2 or 3 or 4 or 6 or 7, characterized in that: The supporting device comprises a sliding tube (6), a plurality of horizontally arranged threaded tubes (7) are fixed to the outer wall of the sliding tube (6), and the threaded tube (7) is coaxially threadedly connected to a screw rod (8).

9. A gas turbine combustion chamber laser drilling tool according to claim 8, characterized in that: A spherical top head (801) is provided at one end of the screw rod (8) away from the slide tube (6), and a rotating handle (802) is coaxially fixed on the screw rod (8).

10. A gas turbine combustion chamber laser drilling tool according to claim 8, characterized in that: The inner wall of the sliding tube (6) is provided with a convex block (601), the outer wall of the vertical tube (3) is provided with a concave groove (301), and the convex block (601) is slidably arranged inside the concave groove (301).

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