Gas turbine blade dressing device

Abstract

The present application belongs to the field of gas turbine blade grinding equipment, and particularly relates to a gas turbine blade grinding device, which comprises a rack, a turnover frame and a turnover frame driving assembly connected to the rack, a moving plate connected to the turnover frame through a guide assembly, a moving plate adjusting assembly connected between the turnover frame and the moving plate, a circular ring disc rotatably arranged on the moving plate, a plurality of blade mounting molds connected to the inner side wall of the circular ring disc, a grinding wheel driving assembly installed on the rack, a grinding wheel located in the circular ring disc and coupled to the output shaft of the grinding wheel driving assembly, and a strip-shaped hole corresponding to the grinding wheel and penetrating through the moving plate. The gas turbine blade grinding device can simultaneously grind a plurality of blades, effectively improving the grinding efficiency. Meanwhile, the device has a simple structure and low cost relative to the machining center, effectively reducing the grinding cost.

Description

Technical Field

[0001] This invention relates to a gas turbine blade grinding device, belonging to the field of gas turbine blade grinding equipment. Background Technology

[0002] Gas turbine blades are crucial components for the proper functioning of a gas turbine, thus requiring routine maintenance. During routine maintenance, it's common for one or more blades to become damaged. Replacing all blades simultaneously would not only increase operating costs but also waste older blades. Currently, only damaged blades are replaced. Because the new blades differ slightly in angle from the old ones, the new blades need to be ground.

[0003] In existing technologies, large machining centers are typically used to grind new blades. Since only one blade can be ground at a time, the grinding efficiency is low. Furthermore, large machining centers are expensive, which undoubtedly increases the grinding cost. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide a gas turbine blade grinding device that can improve grinding efficiency and reduce grinding cost.

[0005] The gas turbine blade grinding device of the present invention includes a frame, a tilting frame and a tilting frame drive assembly connected to the frame, a movable plate connected to the tilting frame via a guide assembly, and a movable plate adjustment assembly connected between the tilting frame and the movable plate. A circular disc is rotatably mounted on the movable plate, and multiple blade mounting molds are connected to the inner wall of the circular disc. A grinding wheel drive assembly is mounted on the frame, and the output shaft of the grinding wheel drive assembly is connected to a grinding wheel located inside the circular disc. A slotted hole corresponding to the grinding wheel is passed through the movable plate. The blade mounting molds are used to install undamaged old blades and new blades to be replaced; the movable plate adjustment assembly is used to adjust the movement of the movable plate, and the slotted hole prevents interference between the movable plate and the rotating shaft of the grinding wheel during movement. The movement of the movable plate drives the circular disc to move, thereby adjusting the distance between the blade and the grinding wheel; the tilting frame drive assembly drives the tilting frame to tilt, which in turn drives the movable plate and the circular disc to tilt, thereby adjusting the angle between the blade and the grinding wheel; the grinding wheel drive assembly drives the grinding wheel to rotate, thereby grinding the blade.

[0006] Preferably, the tilting frame includes two slide blocks fixed on both sides of the front end of the top of the frame. Each slide block is provided with a strip-shaped sliding hole. A slider is slidably connected in each of the two strip-shaped sliding holes. A support frame is fixedly connected to each slider. A mounting seat is hinged to the upper end of each support frame. The rear end of each mounting seat is connected to the tilting frame drive assembly. The structure is simple and the operation is stable.

[0007] Preferably, the tilting frame drive assembly includes two screw jacks fixed to the left and right side walls of the frame. The two screw jacks are linked together, and one of the screw jacks is connected to a lifting motor. The rear ends of the two mounting bases are hinged to connecting blocks by pins. The two connecting blocks are fixedly connected to the lifting rods of the two screw jacks respectively. The lifting motor drives the screw jacks to move. The lifting and lowering movement of the lifting rods of the screw jacks can drive the rear side of the tilting frame to rise and fall, thereby realizing the tilting of the tilting frame. The structure is simple and easy to control.

[0008] Preferably, the front and rear ends of the tilting frame are respectively provided with a front mounting plate and a rear mounting plate. The guide assembly includes two guide shafts fixed between the front mounting plate and the rear mounting plate. Guide sleeves are connected to both guide shafts. Each guide sleeve is fixedly connected to the moving plate. The directional movement of the moving plate is realized through the cooperation of the guide shafts and guide sleeves.

[0009] Preferably, the movable plate adjustment assembly includes a screw threadedly connected to the front mounting plate and a rotary joint fixedly connected to the movable plate. One end of the screw is connected to the rotary joint, and the other end of the screw is connected to a handle. By rotating the handle, the screw is driven to rotate back and forth, thereby driving the movable plate to move back and forth under the action of the rotary joint.

[0010] Preferably, the grinding wheel drive component is a grinding motor, which drives the grinding wheel to rotate by the action of the grinding motor.

[0011] Preferably, the outer wall of the annular disk is provided with several external teeth, which can increase the friction between the annular disk and the operator's hand, making it easier for the annular disk to rotate.

[0012] Preferably, a turntable bearing is installed on the movable plate, and the annular disk is mounted on the inner gear ring of the turntable bearing. The rotational connection between the annular disk and the movable plate is realized through the turntable bearing, which has a simple structure and stable operation.

[0013] Preferably, the blade mounting mold and the annular disk are fixedly connected by bolts, which allows the blade mounting mold to be disassembled, facilitating the maintenance and replacement of the blade mounting mold.

[0014] Preferably, the annular disk has several grooves, and each blade mounting mold is inserted into its corresponding groove. The grooves can position the blade mounting mold, making the installation of the blade mounting mold simpler.

[0015] The beneficial effects of this invention compared to the prior art are:

[0016] The gas turbine blade grinding device of the present invention can grind multiple blades simultaneously, effectively improving grinding efficiency; at the same time, compared with a machining center, this device has a simple structure and low cost, effectively reducing grinding costs. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention;

[0018] Figure 2 yes Figure 1 The main view;

[0019] Figure 3 yes Figure 1 The left view;

[0020] Figure 4 yes Figure 1 Top view.

[0021] In the diagram: 1. Frame; 2. Screw jack; 3. Lifting motor; 4. Guide sleeve; 5. Guide shaft; 6. Pin; 7. Connecting block; 8. Rear mounting plate; 9. Moving plate; 10. Groove; 11. Grinding wheel; 12. Blade mounting mold; 13. Circular disc; 14. External tooth pattern; 15. Screw; 16. Handle; 17. Front mounting plate; 18. Mounting seat; 19. Support frame; 20. Turntable bearing; 21. Grinding motor; 22. Strip hole; 23. Rotary joint; 24. Slide seat; 25. Slider; 26. Strip hole. Detailed Implementation

[0022] The embodiments of the present invention will be further described below with reference to the accompanying drawings:

[0023] Example 1:

[0024] like Figures 1 to 4 As shown, the gas turbine blade grinding device of the present invention includes a frame 1, a tilting frame and a tilting frame drive assembly connected to the frame 1, a moving plate 9 connected to the tilting frame via a guide assembly, a moving plate adjustment assembly connected between the tilting frame and the moving plate 9, a circular disc 13 rotatably mounted on the moving plate 9, a plurality of blade mounting molds 12 connected to the inner side wall of the circular disc 13, a grinding wheel drive assembly mounted on the frame 1, the output shaft of the grinding wheel drive assembly connected to a grinding wheel 11 located inside the circular disc 13, and a strip hole 22 corresponding to the grinding wheel 11 penetrating through the moving plate 9. The blade mounting mold 12 is used to install undamaged old blades and new blades to be replaced; the moving plate adjustment assembly is used to adjust the movement of the moving plate 9, and the strip hole 22 can prevent interference between the moving plate 9 and the rotating shaft of the grinding wheel 11 when the moving plate 9 moves. The movement of the moving plate 9 can drive the circular disk 13 to move, thereby adjusting the distance between the blade and the grinding wheel 11; the flipping frame drive assembly is used to drive the flipping frame to flip, and the flipping frame can drive the moving plate 9 and the circular disk 13 to flip, thereby adjusting the angle between the blade and the grinding wheel 11; the grinding wheel drive assembly is used to drive the grinding wheel 11 to rotate, thereby grinding the blade.

[0025] Working principle and process:

[0026] In use, one undamaged old blade and several new blades to be ground are installed one by one on the blade mounting mold 12. Since the annular disk 13 is not concentric with the grinding wheel 11, the old blade can be positioned at the angle closest to the grinding wheel 11 by rotating the annular disk 13. Then, the position and angle of the old blade are continuously adjusted by the moving plate adjustment assembly and the flipping frame drive assembly until the blade tip of the old blade is completely aligned with the side wall of the grinding wheel 11. The position of the annular disk 13 is then marked. Finally, the moving plate adjustment assembly is used to move the moving plate 9 in the opposite direction to increase the size of the old blade. The purpose of the distance between the new blade and the grinding wheel 11 is to prevent the friction area between the new blade and the grinding wheel 11 from being too large when the new blade rotates to the initial position of the old blade, thereby preventing the new blade from being damaged due to excessive wear. Then, the grinding wheel 11 is driven to rotate by the grinding wheel drive assembly, and then the position of the annular disk 13 is adjusted again by the moving plate adjustment assembly to gradually shorten the distance between the old blade and the grinding wheel 11. The grinding wheel 11 can then continuously grind the new blade. When the annular disk 13 returns to the marked position, the new blade is ground to the size of the old blade, thus completing the grinding operation of the blade to be replaced.

[0027] The gas turbine blade grinding device of the present invention can grind multiple blades simultaneously, effectively improving grinding efficiency; at the same time, compared with a machining center, this device has a simple structure and low cost, effectively reducing grinding costs.

[0028] Example 2:

[0029] like Figures 1 to 4 As shown, based on Example 1,

[0030] Preferably, the tilting frame includes two slide blocks 24 fixed on both sides of the top front end of the frame 1. Each slide block 24 is provided with a strip-shaped sliding hole 26. A slider 25 is slidably connected in each of the two strip-shaped sliding holes 26. A support frame 19 is fixedly connected to each of the two sliders 25. A mounting seat 18 is hinged to the upper end of each of the two support frames 19. The rear ends of each mounting seat 18 are connected to the tilting frame drive assembly. The structure is simple and the operation is stable.

[0031] Preferably, the tilting frame drive assembly includes two screw jacks 2 fixed on the left and right side walls of the frame 1. The two screw jacks 2 are linked together. One of the screw jacks 2 is connected to a lifting motor 3. The rear ends of the two mounting seats 18 are hinged to connecting blocks 7 through pins 6. The two connecting blocks 7 are fixedly connected to the lifting rods of the two screw jacks 2 respectively. The lifting motor 3 drives the screw jacks 2 to move. The lifting and lowering movement of the lifting rods of the screw jacks 2 can drive the rear side of the tilting frame to rise and fall, thereby realizing the tilting of the tilting frame. The structure is simple and easy to control.

[0032] Preferably, the front and rear ends of the tilting frame are respectively provided with a front mounting plate 17 and a rear mounting plate 8. The guide assembly includes two guide shafts 5 fixed between the front mounting plate 17 and the rear mounting plate 8. Guide sleeves 4 are connected to both guide shafts 5. Each guide sleeve 4 is fixedly connected to the moving plate 9. The directional movement of the moving plate 9 is realized through the cooperation of the guide shafts 5 and the guide sleeves 4.

[0033] Preferably, the movable plate adjustment assembly includes a screw 15 threadedly connected to the front mounting plate 17 and a rotary joint 23 fixedly connected to the movable plate 9. One end of the screw 15 is connected to the rotary joint 23, and the other end of the screw 15 is connected to a handle 16. By rotating the handle 16, the screw 15 is driven to rotate back and forth, thereby driving the movable plate 9 to move back and forth under the action of the rotary joint 23.

[0034] Preferably, the grinding wheel drive assembly is a grinding motor 21, which drives the grinding wheel 11 to rotate when the grinding motor 21 is activated;

[0035] Preferably, the outer wall of the annular disk 13 is provided with a plurality of external teeth 14 to facilitate the rotation of the annular disk 13;

[0036] Preferably, a turntable bearing 20 is installed on the movable plate 9, and the annular disk 13 is installed on the internal gear ring of the turntable bearing 20. The rotational connection between the annular disk 13 and the movable plate 9 is realized through the turntable bearing 20, which has a simple structure and stable operation.

[0037] Preferably, the blade mounting mold 12 and the annular disk 13 are fixedly connected by bolts, which allows the blade mounting mold 12 to be disassembled, facilitating the maintenance and replacement of the blade mounting mold 12;

[0038] Preferably, the annular disk 13 is provided with a plurality of grooves 10, and each blade mounting mold 12 is inserted into its corresponding groove 10. The grooves 10 can position the blade mounting mold 12, making the installation of the blade mounting mold 12 simpler.

[0039] Working principle and process:

[0040] In use, an undamaged old blade and several new blades to be ground are installed one by one on the blade mounting mold 12. Since the annular disc 13 and the grinding wheel 11 are not concentric, the old blade can be positioned closest to the grinding wheel 11 by rotating the annular disc 13. Then, by rotating the handle 16, the screw 15 is rotated back and forth, thereby causing the moving plate 9 and the annular disc 13 to move back and forth under the action of the rotating joint 23. The lifting motor 3 drives the screw jack 2 to move. The lifting and lowering movement of the screw jack 2 can drive the tilting frame to tilt, thereby causing the moving plate 9 and the annular disc 13 to tilt. By adjusting the continuous back and forth movement and tilting of the annular disc 13, the position and angle of the old blade can be continuously adjusted so that the blade tip of the old blade is aligned with the grinding wheel 11. The sidewalls of wheel 11 are completely aligned, and the position of the annular disc 13 is marked. Then, by rotating the handle 16 in the opposite direction, the moving plate 9 moves in the opposite direction, increasing the distance between the old blade and the grinding wheel 11. The purpose is to prevent the new blade from having a large friction area with the grinding wheel 11 when rotating the old blade to its initial position, thereby preventing the new blade from being damaged due to excessive wear. Then, the grinding motor 21 is activated to drive the grinding wheel 11 to rotate. Then, by rotating the handle 16 in the forward direction again, the position of the annular disc 13 is adjusted, gradually shortening the distance between the old blade and the grinding wheel 11. The grinding wheel 11 can then continuously grind the new blade. When the annular disc 13 returns to the marked position, the new blade is ground to the size of the old blade, thus completing the grinding operation of the blade to be replaced.

[0041] The beneficial effects of this invention compared to the prior art are:

[0042] The gas turbine blade grinding device of the present invention can grind multiple blades simultaneously, effectively improving grinding efficiency; at the same time, compared with a machining center, this device has a simple structure and low cost, effectively reducing grinding costs.

[0043] It should be noted that in the description of this invention, the terms "left", "right", "front", "rear", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and do not require that this invention must be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

Claims

1. A gas turbine blade grinding device, characterized in that: Includes a frame (1), on which a tilting frame and a tilting frame drive assembly are connected. A movable plate (9) is connected to the tilting frame via a guide assembly. A movable plate adjustment assembly is also connected between the tilting frame and the movable plate (9). A circular disc (13) is rotatably mounted on the movable plate (9). Multiple blade mounting molds (12) are connected to the inner wall of the circular disc (13). A grinding wheel drive assembly is mounted on the frame (1). The output shaft of the grinding wheel drive assembly is connected to a grinding wheel (11) located inside the circular disc (13). The movable plate ( 9) A strip-shaped hole (22) corresponding to the grinding wheel (11) is passed through it; the flipping frame includes two slides (24) fixed on both sides of the front end of the top of the frame (1), each slide (24) is provided with a strip-shaped sliding hole (26), and a slider (25) is slidably connected in each of the two strip-shaped sliding holes (26). A support frame (19) is fixedly connected to each of the two sliders (25), and a mounting seat (18) is hinged to the upper end of each of the two support frames (19). The rear ends of each mounting seat (18) are connected to the flipping frame drive assembly; the flipping frame The drive assembly includes two screw jacks (2) fixed on the left and right side walls of the frame (1), which are linked together. One of the screw jacks (2) is connected to a lifting motor (3). The rear ends of the two mounting bases (18) are hinged to connecting blocks (7) by pins (6). The two connecting blocks (7) are fixedly connected to the lifting rods of the two screw jacks (2) respectively. The front and rear ends of the tilting frame are respectively provided with a front mounting plate (17) and a rear mounting plate (8). The guide assembly includes two screw jacks fixed on the front mounting plate. (17) A guide shaft (5) between the rear mounting plate (8) and the guide shaft (5) are connected to guide sleeves (4), and each guide sleeve (4) is fixedly connected to the moving plate (9); the moving plate adjustment assembly includes a screw (15) threadedly connected to the front mounting plate (17) and a rotary joint (23) fixedly connected to the moving plate (9). One end of the screw (15) is connected to the rotary joint (23), and the other end of the screw (15) is connected to a handle (16); the grinding wheel drive assembly is a grinding motor (21).

2. The gas turbine blade grinding device according to claim 1, characterized in that: The outer wall of the circular disk (13) is provided with several external teeth (14).

3. The gas turbine blade grinding device according to claim 1, characterized in that: The movable plate (9) is equipped with a turntable bearing (20), and the annular disk (13) is mounted on the inner gear ring of the turntable bearing (20).

4. The gas turbine blade grinding device according to any one of claims 1 to 3, characterized in that: The blade mounting mold (12) and the annular disk (13) are fixedly connected by bolts.

5. The gas turbine blade grinding device according to claim 4, characterized in that: The circular disk (13) is provided with several grooves (10), and each blade mounting mold (12) is inserted into its corresponding groove (10).

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