Anti-wear treatment device for steam turbine blade

Abstract

The utility model belongs to the technical field of steam turbines, and particularly relates to a steam turbine blade anti-abrasion treatment device which comprises a machining table, supporting frames are symmetrically and fixedly connected to the upper surface of the machining table, and a guide rod and a lead screw are rotationally connected to the opposite sides of the two supporting frames from top to bottom respectively. The outer wall of the guide rod is slidably connected with a sliding seat, and the upper side wall of the supporting frame is fixedly connected with a first driver. The thickness of the stator blade is movably measured through the laser range finder, so that the thickness change of the surface of the stator blade is measured, data is transmitted to the controller to be recorded, and the telescopic length of the first electric push rod is controlled according to the measured data; the telescopic amplitude of the first electric push rod during movement is kept consistent with the movement measurement data change of the laser range finder, so that the movement track of the spraying head is attached to the surface of the stator blade, constant-speed movement of the spraying head is achieved, and the spraying uniformity is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine technology, specifically to a steam turbine blade anti-wear treatment device. Background Technology

[0002] The stationary blades of the steam turbine are fixed on the circumference of the diaphragm body, and the two together form the steam turbine diaphragm. The diaphragm is used to divide the inside of the cylinder into multiple power chambers. Therefore, the working environment of the steam turbine stationary blades is relatively harsh. In order to improve the wear resistance, corrosion resistance and other properties of the steam turbine stationary blades, it is usually necessary to spray special coatings on their surface.

[0003] However, the surface shape of the stationary blades is relatively distorted, making it difficult to maintain a certain spraying distance when using existing spraying equipment, which easily leads to uneven spraying.

[0004] The existing Chinese patent with publication number CN217411207U discloses a turbine stationary blade spraying device, which includes a support frame, a spraying track mechanism and a sliding mechanism, wherein the spraying track mechanism and the sliding mechanism are arranged on the support frame.

[0005] Regarding the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: the device uses manual pushing of the slider to move the spray head for spraying, and the manual operation method makes it difficult to ensure the uniform speed of the spray head movement, thus affecting the spraying effect, which needs to be improved; therefore, a steam turbine blade anti-wear treatment device is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the shortcomings of the existing technology and solve the above-mentioned technical problems, this utility model proposes a steam turbine blade anti-wear treatment device.

[0007] The technical solution adopted by this utility model to solve its technical problem is as follows: The steam turbine blade anti-wear treatment device of this utility model includes a processing table. A support frame is symmetrically fixedly connected to the upper surface of the processing table. A guide rod and a lead screw are rotatably connected from top to bottom on opposite sides of the two support frames. A sliding seat is slidably connected to the outer wall of the guide rod. The inner wall of the sliding seat is threadedly connected to the outer wall of the lead screw. A driver one is fixedly connected to the upper side wall of the support frame. The driving end of the driver one is fixedly connected to the top end of the lead screw. A driver two is fixedly connected to the lower part of the sliding seat. A mounting base is fixedly connected to the driving end of the driver two. A spraying assembly is installed at the bottom of the mounting base. The spraying assembly includes a laser rangefinder and an electric push rod one. The top end of the laser rangefinder is fixedly connected to the bottom wall of the mounting base. The top end of the electric push rod one is rotatably connected to the bottom wall of the mounting base via a shaft. A spraying pipe is fixedly connected to the driving end of the electric push rod one. Several branch pipes are fixedly connected to the bottom wall of the spraying pipe. A spraying head is fixedly connected to the bottom end of the branch pipe.

[0008] Preferably, the outer wall of the spray pipe is fixedly connected to a liquid inlet, and a valve is installed on the branch pipe.

[0009] Preferably, the length from the center point of the laser rangefinder to the center point of the mounting base is the same as the length from the center point of the electric push rod to the center point of the mounting base.

[0010] Preferably, the angle between the line segment from the center point of the laser rangefinder to the center point of the mounting base and the line segment from the center point of the electric push rod to the center point of the mounting base is 90°.

[0011] Preferably, the spraying assembly further includes an electric push rod two, the top end of which is rotatably connected to the bottom wall of the mounting base via a shaft, and the drive end of the electric push rod two is rotatably connected to the outer wall of the electric push rod one via a shaft.

[0012] Preferably, a limiting component is installed on the surface of the processing table and the support frame. The limiting component includes a plurality of support protrusions arranged in a matrix, and the bottom end of the support protrusions is fixedly connected to the upper surface of the processing table.

[0013] Preferably, the limiting assembly further includes two electric push rods and four sets of limiting arms. The outer wall of the electric push rod penetrates through and is fixedly connected to the lower side wall of the support frame. The driving end of the electric push rod is fixedly connected to a limiting seat. The bottom end of the limiting arm is rotatably connected to the upper surface of the processing table via a shaft.

[0014] Preferably, the outer wall of the limiting seat is rotatably connected to a connecting rod via a shaft, and the other end of the connecting rod is rotatably connected to the outer wall of the limiting arm via a shaft.

[0015] Preferably, the limiting seat includes a connecting seat, and a threaded channel is provided at the center of the outer wall of the connecting seat. A screw is threadedly connected inside the threaded channel, and an adjusting seat is rotatably connected to one end of the screw. The bottom end of the adjusting seat is slidably connected to the upper surface of the processing table.

[0016] The advantages of this utility model are:

[0017] 1. This utility model uses a laser rangefinder to measure the thickness of the stationary blade, thereby measuring the thickness change on the surface of the stationary blade and transmitting the data to the controller for recording. Based on the measurement data, the extension and retraction length of the electric push rod is controlled so that the extension and retraction amplitude of the electric push rod is consistent with the change of the laser rangefinder's measurement data. This ensures that the trajectory of the spray head is in contact with the surface of the stationary blade and achieves uniform movement of the spray head, thereby effectively improving the uniformity of the spraying.

[0018] 2. This utility model achieves accurate positioning of the turbine stationary blades by using a limiting seat to hold the left and right sides of the stationary blades and a limiting arm to hold the front and rear sides of the stationary blades. This ensures that the spraying position is fixed when spraying stationary blades of the same size, thus eliminating the need to repeatedly measure their thickness and accelerating the processing efficiency of steam turbine blades. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the processing table and support frame structure of this utility model;

[0022] Figure 3 This is a schematic diagram of the spraying assembly structure of this utility model;

[0023] Figure 4 This is a schematic diagram of the limiting component structure of this utility model;

[0024] Figure 5 This utility model Figure 4 A schematic diagram of structure A.

[0025] In the diagram: 1. Processing table; 2. Support frame; 3. Guide rod; 4. Lead screw; 5. Sliding seat; 6. Driver 1; 7. Spraying assembly; 71. Laser rangefinder; 72. Electric push rod 1; 73. Spraying pipe; 74. Spraying head; 75. Liquid inlet end; 76. Electric push rod 2; 8. Limiting assembly; 81. Support protrusion; 82. Electric push rod 3; 83. Limiting seat; 84. Limiting arm; 85. Connecting rod; 831. Connecting seat; 832. Screw; 833. Adjusting seat; 9. Driver 2; 10. Mounting seat. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0027] Example 1

[0028] Please see Figure 1-4 As shown, the anti-wear treatment device for steam turbine blades includes a processing table 1. Support frames 2 are symmetrically fixedly connected to the upper surface of the processing table 1. Guide rods 3 and lead screws 4 are rotatably connected from top to bottom on opposite sides of the two support frames 2. A sliding seat 5 is slidably connected to the outer wall of the guide rod 3. The inner wall of the sliding seat 5 is threadedly connected to the outer wall of the lead screw 4. A driver 1 6 is fixedly connected to the upper side wall of the support frame 2. The driving end of driver 1 6 is fixedly connected to the top end of the lead screw 4. A driver 2 9 is fixedly connected to the lower part of the sliding seat 5. The drive end of the second driver 9 is fixedly connected to the mounting base 10. The bottom of the mounting base 10 is equipped with a spraying assembly 7. The spraying assembly 7 includes a laser rangefinder 71 and an electric push rod 72. The top of the laser rangefinder 71 is fixedly connected to the bottom wall of the mounting base 10. The top of the electric push rod 72 is rotatably connected to the bottom wall of the mounting base 10 via a shaft. The drive end of the electric push rod 72 is fixedly connected to a spraying pipe 73. Several branch pipes are fixedly connected to the bottom wall of the spraying pipe 73. The bottom end of the branch pipes is fixedly connected to a spraying head 74.

[0029] Specifically, the second driver 9 rotates the mounting base 10, so that the laser rangefinder 71 is located on the transverse center line of the processing table 1 during measurement, and can move along the transverse center line of the processing table 1. The first driver 6 rotates at a constant speed to drive the lead screw 4 to rotate. The rotation of the lead screw 4 drives the sliding seat 5 to slide along the guide rod 3. When the sliding seat 5 moves, it drives the laser rangefinder to move and measure the thickness of the stationary blade. After the measurement is completed, the first driver 6 moves in the opposite direction to drive the sliding seat 5 to return to its original position. The second driver 9 rotates 90° to drive the mounting base 10 to rotate, so that the spray pipe 73 is perpendicular to the transverse center line of the processing table 1. The first driver 6 runs again to drive the spray head 74 to spray the anti-wear coating onto the stationary blade.

[0030] The outer wall of the spray pipe 73 is fixedly connected to the liquid inlet 75, and a valve is installed on the branch pipe.

[0031] Specifically, the inlet end 75 is connected to the output end of the paint delivery pump through a pipeline, so that the paint delivery pump draws the anti-wear paint into the spray pipe 73 and sprays it out from the spray head 74. The spray head 74 can be turned on and off by a valve.

[0032] The length from the center point of the laser rangefinder 71 to the center point of the mounting base 10 is the same as the length from the center point of the electric push rod 72 to the center point of the mounting base 10. The angle between the line segment from the center point of the laser rangefinder 71 to the center point of the mounting base 10 and the line segment from the center point of the electric push rod 72 to the center point of the mounting base 10 is 90°.

[0033] Specifically, the second driver 9 drives the mounting base 10 to rotate 90°, thereby switching the positions of the spray head 74 and the laser rangefinder 71, so that they can move along the transverse centerline of the processing table 1 when they are working separately.

[0034] The spraying assembly 7 also includes an electric push rod 76, the top of which is rotatably connected to the bottom wall of the mounting base 10 via a shaft, and the drive end of the electric push rod 76 is rotatably connected to the outer wall of the electric push rod 72 via a shaft.

[0035] Specifically, the electric push rod 2 76 is used to control the tilt angle of the electric push rod 1 72. During spraying, the electric push rod 2 76 retracts and pulls the electric push rod 1 72 vertically, so that the spray head 74 can face the stationary blade directly. After spraying is completed, the electric push rod 2 76 extends and pushes the electric push rod 1 72 upward to rotate away from the stationary blade, thereby facilitating the picking up or placing of the stationary blade.

[0036] Example 2

[0037] For comparison with Example 1, please refer to Figure 5 As shown, this utility model provides another embodiment, in which a limiting component 8 is installed on the surface of the processing table 1 and the support frame 2. The limiting component 8 includes a plurality of support protrusions 81 arranged in a matrix, and the bottom end of the support protrusions 81 is fixedly connected to the upper surface of the processing table 1.

[0038] Specifically, the support protrusion 81 is used to suspend the stationary blade, thereby preventing the bottom of the stationary blade from adhering to the spray liquid remaining on the upper surface of the processing table 1 due to previous processing.

[0039] The limiting assembly 8 also includes two electric push rods 82 and four sets of limiting arms 84. The outer wall of the electric push rod 82 passes through and is fixedly connected to the lower side wall of the support frame 2. The drive end of the electric push rod 82 is fixedly connected to the limiting seat 83. The bottom end of the limiting arm 84 is rotatably connected to the upper surface of the processing table 1 through a shaft. The outer wall of the limiting seat 83 is rotatably connected to a connecting rod 85 through a shaft. The other end of the connecting rod 85 is rotatably connected to the outer wall of the limiting arm 84 through a shaft.

[0040] Specifically, the electric push rod 82 is used to push the limit seat 83 against the left and right sides of the stationary blade, and through the connecting rod 85, it drives the limit arm 84 to rotate and abut against the front and rear sides of the stationary blade, so as to achieve accurate positioning of the turbine stationary blade.

[0041] The limiting seat 83 includes a connecting seat 831. A threaded channel is provided at the center of the outer wall of the connecting seat 831. A screw 832 is threadedly connected inside the threaded channel. One end of the screw 832 is rotatably connected to an adjusting seat 833. The bottom end of the adjusting seat 833 is slidably connected to the upper surface of the processing table 1.

[0042] Specifically, the adjusting seat 833 is used to abut against the stationary blade, and the rotating screw 832 is used to adjust the distance between the adjusting seat 833 and the connecting seat 831. Thus, when the limiting arm 84 rotates to abut against the front and rear sides of the stationary blade, the position of the adjusting seat 833 can be adjusted according to the length of the stationary blade, so that the limiting component 8 can be used for stationary blades of various sizes.

[0043] Those skilled in the art should connect all electrical components and their compatible power supplies in this case via wires. Furthermore, appropriate controllers should be selected and electrically connected to Driver 1, Driver 2, the laser rangefinder, Electric Actuator 1, Electric Actuator 2, and Electric Actuator 3, according to the actual situation, to meet control requirements. The specific connections and control sequence should refer to the working principle described below, where the electrical connections are completed according to the sequential working order of each electrical component. The detailed connection methods are well-known in the art. The following mainly introduces the working principle and process, without further explanation of the electrical control.

[0044] The working principle is as follows: the turbine stationary blade to be sprayed is placed on the support protrusion 81, and the electric push rod 82 extends. The extension of the electric push rod 82 pushes the limiting seat 83 to abut against the left and right sides of the stationary blade, and through the connecting rod 85, it drives the limiting arm 84 to rotate and abut against the front and rear sides of the stationary blade, so as to achieve accurate positioning of the turbine stationary blade. This makes the spraying position fixed when spraying stationary blades of the same size, so that the thickness does not need to be measured repeatedly, thus speeding up the processing efficiency of steam turbine blades.

[0045] The drive unit 6 drives the lead screw 4 to rotate, which in turn drives the sliding seat 5 to move laterally along the guide rod 3. This allows the laser rangefinder 71 to move and measure the thickness of the stationary blade, thereby measuring the thickness change on the surface of the stationary blade and transmitting the data to the controller for recording. After the measurement is completed, the drive unit 6 moves in the reverse direction, causing the sliding seat 5 to return to its original position. The drive unit 6 then moves the spray head 74 at a constant speed to spray the anti-wear coating onto the surface of the stationary blade. The extension and retraction length of the electric push rod 72 is controlled according to the measurement data, ensuring that the extension and retraction amplitude of the electric push rod 72 is consistent with the change in the measurement data of the laser rangefinder 71. This ensures that the movement trajectory of the spray head 74 is in contact with the surface of the stationary blade and achieves uniform movement of the spray head 74, thereby effectively improving the uniformity of the spraying.

[0046] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. Steam turbine blade anti-wear treatment device, comprising a processing table (1), characterized in that: The upper surface of the processing table (1) is symmetrically connected with support frames (2), the opposite sides of the two support frames (2) are rotatably connected with guide rods (3) and lead screws (4) from top to bottom, respectively, the outer wall of the guide rod (3) is slidably connected with a sliding seat (5), the inner wall of the sliding seat (5) is threadedly connected with the outer wall of the lead screw (4), the upper side wall of the support frame (2) is fixedly connected with a driver one (6), the driving end of the driver one (6) is fixedly connected with the top end of the lead screw (4), the lower side of the sliding seat (5) is fixedly connected with a driver two (9), the driving end of the driver two (9) is fixedly connected with a mounting seat (10), the bottom of the mounting seat (10) is provided with a spraying assembly (7), the spraying assembly (7) comprises a laser range finder (71) and an electric push rod one (72), the top end of the laser range finder (71) is fixedly connected with the bottom wall of the mounting seat (10), the top end of the electric push rod one (72) is rotatably connected with the bottom wall of the mounting seat (10) through a shaft, the driving end of the electric push rod one (72) is fixedly connected with a spraying pipe (73), the bottom wall of the spraying pipe (73) is fixedly connected with a plurality of branch pipes, and the bottom end of the branch pipe is fixedly connected with a spraying head (74).

2. The steam turbine blade anti-erosion treatment apparatus of claim 1, wherein: The outer wall of the spraying pipe (73) is fixedly connected with a liquid inlet end (75), and the branch pipe is provided with a valve.

3. The steam turbine blade anti-erosion treatment apparatus of claim 1, wherein: The length from the center point of the laser range finder (71) to the center point of the mounting seat (10) is the same as the length from the center point of the electric push rod one (72) to the center point of the mounting seat (10).

4. The steam turbine blade anti-erosion treatment apparatus of claim 1, wherein: The angle between the line segment from the center point of the laser range finder (71) to the center point of the mounting seat (10) and the line segment from the center point of the electric push rod one (72) to the center point of the mounting seat (10) is 90°.

5. The steam turbine blade anti-erosion treatment apparatus of claim 1, wherein: The spraying assembly (7) further comprises an electric push rod two (76), the top end of the electric push rod two (76) is rotatably connected with the bottom wall of the mounting seat (10) through a shaft, and the driving end of the electric push rod two (76) is rotatably connected with the outer wall of the electric push rod one (72) through a shaft.

6. The steam turbine blade anti-erosion treatment apparatus of claim 1, wherein: The surface of the processing table (1) and the support frame (2) is provided with a limiting assembly (8), the limiting assembly (8) comprises a plurality of support protrusions (81) distributed in a matrix, and the bottom end of the support protrusion (81) is fixedly connected with the upper surface of the processing table (1).

7. The steam turbine blade erosion protection apparatus of claim 6, wherein: The limiting assembly (8) further comprises two electric push rod threes (82) and four groups of limiting arms (84), the outer wall of the electric push rod three (82) penetrates and is fixedly connected with the lower side wall of the support frame (2), the driving end of the electric push rod three (82) is fixedly connected with a limiting seat (83), and the bottom end of the limiting arm (84) is rotatably connected with the upper surface of the processing table (1) through a shaft.

8. The steam turbine blade anti-erosion treatment apparatus of claim 7, wherein: The outer wall of the limiting seat (83) is rotatably connected with a connecting rod (85), and the other end of the connecting rod (85) is rotatably connected with the outer wall of the limiting arm (84) through a shaft.

9. The steam turbine blade anti-erosion treatment apparatus of claim 8, wherein: The limiting seat (83) includes a connecting seat (831), a threaded channel is arranged at the center of the outer wall of the connecting seat (831), a screw rod (832) is screwed in the threaded channel, one end of the screw rod (832) is rotationally connected with an adjusting seat (833), and the bottom end of the adjusting seat (833) is slidingly connected with the upper surface of the machining table (1).

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