A polishing device for wind power tower cylinder outer wall

Abstract

This invention relates to the field of grinding equipment technology, specifically to a grinding device for the outer wall of wind turbine towers, comprising: a moving part including a vertically rotatably mounted lead screw and a movable slide screw threaded onto the lead screw for linear reciprocating movement along the axial direction of the wind turbine tower; a robotic arm assembly mounted on the movable slide for adjusting the grinding posture close to the surface of the wind turbine tower; and a grinding assembly including a triangular roller frame detachably mounted at the front end of the robotic arm assembly and a sanding belt rotatably mounted on the triangular roller frame, the sanding belt being used to adhere to the surface of the wind turbine tower. This grinding device, employing the coordinated operation of the moving part, the robotic arm assembly, and the grinding assembly, can replace manual hand-held grinding operations, significantly reducing the safety risks and labor intensity of high-altitude operations, effectively improving the grinding efficiency of the outer wall of wind turbine towers, and meeting the batch maintenance needs of large-scale, decentralized wind farms.

Description

Technical Field

[0001] This invention relates to the field of grinding equipment technology, and specifically to a grinding device for the outer wall of a wind turbine tower. Background Technology

[0002] The wind turbine tower is a key component of a wind turbine generator set, primarily serving a supporting function while also absorbing and reducing vibrations. The condition of its surface protection directly affects the safe, reliable operation and service life of the entire unit. Wind turbine generator sets often operate in harsh environments such as high altitudes, high humidity, and remote, desolate areas, and are subject to long-term erosion from wind, sand, rain, sun exposure, and salt spray. Dust and dirt easily accumulate on the outer wall of the tower, leading to rapid aging and damage of the surface protective layer. Common problems include paint peeling, failure of the anti-corrosion coating, and external wall corrosion, which seriously reduce the safety and service life of the equipment. Regular grinding and repair work on the outer wall of the tower is necessary.

[0003] Currently, the grinding of the outer wall of wind turbine towers is still mainly done manually with handheld equipment, which has problems such as low work efficiency, high labor intensity, high labor costs, and prominent safety risks of working at height. With the large-scale, clustered, and decentralized development of the wind power industry, the traditional manual operation mode can no longer meet the high-efficiency maintenance needs of large-scale wind farms, and manual operation is prone to uneven grinding, making it difficult to guarantee the quality of rust removal.

[0004] In summary, the development of a dedicated grinding device adapted to the outer wall of wind turbine towers to replace manual labor and achieve efficient and stable grinding of the outer wall has become an urgent need; therefore, we propose a grinding device for the outer wall of wind turbine towers. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings mentioned in the background section and provide a grinding device for the outer wall of a wind turbine tower.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A grinding device for the outer wall of a wind turbine tower, comprising: The moving part includes a vertically rotatably mounted lead screw and a movable slide screw threaded onto the lead screw for linear reciprocating movement along the axial direction of the wind turbine tower. A robotic arm assembly, mounted on the movable slide, is used to adjust the grinding posture close to the surface of the wind turbine tower; The grinding assembly includes a triangular roller frame detachably mounted on the front end of the robotic arm assembly, and a sanding belt circumferentially mounted on the triangular roller frame, the sanding belt being used to adhere to the surface of the wind turbine tower.

[0007] Preferably, the movable part includes a fixed base that can be detachably installed on an external working platform or lifting mechanism of the wind turbine tower, and the lead screw is rotatably installed on the fixed base via a servo motor; A rigid guide rod is fixedly installed on the fixed base, parallel to the lead screw, and a slider is slidably installed on the rigid guide rod.

[0008] Preferably, the robotic arm assembly includes a tray detachably mounted on the slider and the movable slide, an active arm is rotatably mounted on the tray via an active joint unit, and a driven arm is rotatably mounted at the front end of the active arm via a deflection joint unit; A rotary joint unit is installed at the front end of the driven boom.

[0009] Preferably, a connecting seat for detachably connecting the rotating joint unit is installed at the center of the triangular roller frame; A limiting clamp is installed on the outer edge of the triangular roller frame, and the limiting clamp is provided with a clamping cavity for inserting the sanding belt and preventing it from deviating.

[0010] Preferably, the triangular roller frame is equipped with a pressure roller via a spring-loaded extension and retraction on the side corresponding to the surface of the wind turbine tower, and the sanding belt is fitted onto the pressure roller; The clamping spring is used to press the sanding belt against the surface of the wind turbine tower via the pressure roller.

[0011] Preferably, the active joint unit includes a first bearing seat that is detachably mounted on the support plate via a mounting plate, and a first synchronous wheel is rotatably mounted in the first bearing seat via a rotating shaft; A drive motor is fixedly mounted on the pallet, and the output shaft of the drive motor is connected to the first synchronous pulley via a transmission belt.

[0012] Preferably, the deflection joint unit includes a hollow sleeve shaft rotatably mounted on the active arm via a second bearing seat, and a third synchronous pulley is coaxially fixedly connected to the hollow sleeve shaft; A second geared motor is mounted on the active arm, and the output shaft of the second geared motor is connected to the third synchronous pulley via a transmission belt.

[0013] Preferably, a shaft is rotatably mounted at the center of the hollow sleeve shaft, and a second synchronous pulley and a fourth synchronous pulley are coaxially fixedly connected to both ends of the shaft. The active arm is equipped with a first geared motor, and the output shaft of the first geared motor is connected to the fourth synchronous pulley via a transmission belt.

[0014] Preferably, the rotary joint unit includes a third bearing housing fixedly mounted on the driven arm, and a drive shaft for coaxially connecting the connecting seat is rotatably mounted in the third bearing housing; A fifth synchronous pulley is coaxially connected to the drive shaft; A transmission belt is installed between the second synchronous pulley and the fifth synchronous pulley.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. The grinding device for the outer wall of the wind turbine tower adopts the collaborative operation of the moving part, the robotic arm component and the grinding component, which can replace manual hand grinding operation, greatly reduce the safety risks and labor intensity of high-altitude operation, effectively improve the grinding efficiency of the outer wall of the wind turbine tower, and meet the batch maintenance needs of large-scale and decentralized wind farms. 2. The multi-joint robotic arm precisely adapts to the conical arc-shaped outer wall of the tower, and the elastic clamping sanding belt design can evenly and stably adhere to the grinding surface, solving the problems of uneven manual grinding and poor coating repair quality. This significantly improves the rust removal and protective layer treatment effect of the tower outer wall and extends the service life of the equipment. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings: Figure 1 This is a schematic diagram of the moving part of the present invention; Figure 2 This is a schematic diagram of the robotic arm assembly of the present invention; Figure 3 This is a schematic diagram of the installation of the active joint unit of the present invention; Figure 4 This is a schematic diagram of the installation of the deflection joint unit of the present invention; Figure 5 This is a schematic diagram of the installation of the rotating joint unit of the present invention; Figure 6 This is a schematic diagram of the grinding component of the present invention.

[0017] The meanings of the labels in the diagram are as follows: 1. Servo motor; 2. Moving slide; 3. Rigid guide rod; 4. Fixed base; 5. Lead screw; 11. Drive motor; 12. First geared motor; 13. Second geared motor; 14. Support plate; 15. Deflection joint unit; 16. Rotation joint unit; 17. Active joint unit; 21. End cap; 22. Mounting plate; 23. Rotating shaft; 24. First synchronous pulley; 25. First bearing housing; 31. Second synchronizer pulley; 32. Second bearing housing; 33. Third synchronizer pulley; 34. Fourth synchronizer pulley; 35. Shaft; 36. Hollow sleeve shaft; 41. Fifth synchronizer pulley; 42. Third bearing housing; 43. Drive shaft; 51. Output motor; 52. Triangular roller frame; 53. Connecting seat; 54. Limiting clamp; 55. Clamping spring. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-6 The present invention will describe the above technical solution in detail through the following embodiments: This embodiment provides a grinding device for the outer wall of a wind turbine tower. The device consists of a moving part, a robotic arm assembly, and a grinding assembly. The components are assembled using a detachable connection method, which facilitates on-site installation, debugging, and subsequent maintenance and replacement.

[0020] The movable part includes a fixed base 4, which can be detachably installed on the external working platform or lifting mechanism of the wind turbine tower to provide a stable installation foundation for the entire device. A lead screw 5 is vertically rotatably installed on the fixed base 4. The lead screw 5 is driven to rotate by a servo motor 1, which is fixedly installed on the fixed base 4. In this embodiment, a movable slide 2 is threadedly installed on the lead screw 5. A rigid guide rod 3 parallel to the lead screw 5 is also fixedly installed on the fixed base 4. The rigid guide rods 3 are symmetrically distributed on both sides of the lead screw 5. The movable slide 2 slides in cooperation with the rigid guide rods 3. When the servo motor 1 drives the lead screw 5 to rotate, the movable slide 2 can move in a stable linear reciprocating motion along the axial direction of the wind turbine tower. The rigid guide rod 3 can effectively improve the stability and structural rigidity of the movable slide 2 during the movement process and avoid swaying and deviation.

[0021] The robotic arm assembly includes a support plate 14, which is detachably mounted on the slider of the movable slide 2 and the rigid guide rod 3, and can move synchronously along the tower axis with the movable slide 2. An active arm is rotatably mounted on the support plate 14 via an active joint unit 17. The active joint unit 17 includes a mounting plate 22, a first bearing seat 25, a rotating shaft 23, a first synchronous wheel 24, and an end cover 21. The mounting plate 22 is fixed on the support plate 14, the first bearing seat 25 is fixedly mounted on the mounting plate 22, the rotating shaft 23 is assembled in the first bearing seat 25 through a bearing, the first synchronous wheel 24 is fixedly mounted on the rotating shaft 23, and the end cover 21 is encapsulated at the end of the first bearing seat 25. A drive motor 11 is fixedly mounted on the support plate 14, and the output shaft of the drive motor 11 is connected to the first synchronous wheel 24 through a transmission belt, thereby driving the active arm to complete the rotation action.

[0022] A driven arm is rotatably mounted on the front end of the active arm via a deflection joint unit 15. The deflection joint unit 15 includes a second bearing housing 32, a hollow sleeve shaft 36, a shaft 35, a second synchronous pulley 31, a third synchronous pulley 33, and a fourth synchronous pulley 34. The hollow sleeve shaft 36 is rotatably mounted on the active arm via the second bearing housing 32, and the third synchronous pulley 33 is fixedly mounted on the hollow sleeve shaft 36. A second reduction motor 13 is mounted on the active arm, and the output shaft of the second reduction motor 13 is connected to the third synchronous pulley 33 via a transmission belt to realize the swing drive of the driven arm. The shaft 35 is coaxially inserted inside the hollow sleeve shaft 36 and can rotate relatively independently. The second synchronous pulley 31 and the fourth synchronous pulley 34 are fixedly mounted at both ends of the shaft 35, respectively. A first reduction motor 12 is mounted on the active arm, and the output shaft of the first reduction motor 12 is connected to the fourth synchronous pulley 34 via a transmission belt to transmit power to the rotation joint unit 16.

[0023] A rotating joint unit 16 is installed at the front end of the driven boom. The rotating joint unit 16 includes a third bearing seat 42, a drive shaft 43, and a fifth synchronous pulley 41. The third bearing seat 42 is fixedly installed on the driven boom, the drive shaft 43 is rotatably mounted in the third bearing seat 42, and the fifth synchronous pulley 41 is fixedly installed on the drive shaft 43. The second synchronous pulley 31 and the fifth synchronous pulley 41 are connected by a drive belt. The drive shaft 43 can drive the grinding assembly to complete the posture adjustment. In this embodiment, the drive motor 11, the first reduction motor 12, and the second reduction motor 13 are all servo motors, which can effectively improve the load capacity of the device and avoid overheating and shutdown during long-term operation, thus meeting the requirements of automated continuous operation.

[0024] The grinding assembly includes a triangular roller frame 52, with a connecting seat 53 fixedly mounted at the center of the triangular roller frame 52. The connecting seat 53 is detachably connected to the drive shaft 43 and is driven by the drive shaft 43 to achieve rotational positioning. An output motor 51 is fixedly mounted on the triangular roller frame 52, which drives the sanding belt to rotate circumferentially to achieve continuous grinding operations. A limiting clamp 54 is provided at the outer edge of the triangular roller frame 52. The limiting clamp 54 has a cavity adapted to the sanding belt, and the sanding belt is clamped in the cavity to effectively prevent deviation and movement during grinding. A pressure roller is telescopically mounted on the side of the triangular roller frame 52 facing the outer wall of the tower through a clamping spring 55. The sanding belt is fitted on the pressure roller, and the clamping spring 55 continuously provides elastic clamping force, so that the sanding belt always fits tightly against the curved surface of the outer wall of the tower, improving the grinding uniformity and rust removal effect.

[0025] When the device is in operation, the fixed base 4 is fixed to the external working platform of the tower. The servo motor 1 drives the lead screw 5 to rotate, which in turn drives the moving slide 2 and the robotic arm assembly to feed along the axial direction of the tower. The drive motor 11, the first reduction motor 12, and the second reduction motor 13 work together to adjust the spatial posture of the grinding assembly through the cooperation of the active joint unit 17, the deflection joint unit 15, and the rotation joint unit 16. This ensures that the line connecting the center of the triangular roller frame 52 to the grinding contact surface always points to the center of the tower cross-section, guaranteeing that the sanding belt is stably attached to the conical outer wall of the tower. The output motor 51 drives the sanding belt to run continuously. The clamping spring 55 and the limiting clamp 54 cooperate to keep the sanding belt stable. In this embodiment, the cross-section of the tower is divided into six equal parts in the circumference for grinding. The axial feed and the circumferential grinding action are coordinated to complete the automated, efficient, and highly uniform grinding operation of the entire conical outer wall of the wind turbine tower.

[0026] This device adopts a servo motor drive and synchronous belt transmission structure, with strong overall load capacity and good continuous working stability. It can replace manual labor to complete the grinding and maintenance of the outer wall of high-altitude towers, significantly improving work efficiency, reducing safety risks and labor costs, and is suitable for the maintenance and use needs of large-scale wind farms.

[0027] It should be noted that if the embodiments of the present invention involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0028] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, "multiple" refers to two or more. Moreover, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0029] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A grinding device for the outer wall of a wind turbine tower, characterized in that: include: The moving part includes a vertically rotatably mounted lead screw (5) and a movable slide (2) threaded onto the lead screw (5) for linear reciprocating movement along the axial direction of the wind turbine tower. The robotic arm assembly is mounted on the movable slide (2) and is used to adjust the grinding posture close to the surface of the wind turbine tower. The grinding assembly includes a triangular roller frame (52) detachably mounted on the front end of the robotic arm assembly, and a sanding belt circumferentially mounted on the triangular roller frame (52) for adhering to the surface of the wind turbine tower.

2. The grinding device for the outer wall of a wind turbine tower as described in claim 1, characterized in that: The movable part includes a fixed base (4) that can be detachably installed on the external working platform or lifting mechanism of the wind turbine tower, and the lead screw (5) is rotatably installed on the fixed base (4) by a servo motor (1); A rigid guide rod (3) is fixedly installed on the fixed base (4) and parallel to the lead screw (5). A slider is slidably installed on the rigid guide rod (3).

3. The grinding device for the outer wall of a wind turbine tower as described in claim 2, characterized in that: The robotic arm assembly includes a tray (14) detachably mounted on the slider and the movable slide (2), an active arm is rotatably mounted on the tray (14) via an active joint unit (17), and a driven arm is rotatably mounted at the front end of the active arm via a deflection joint unit (15). A rotary joint unit (16) is installed at the front end of the driven boom.

4. The grinding device for the outer wall of a wind turbine tower as described in claim 3, characterized in that: A connecting seat (53) for detachably connecting the rotating joint unit (16) is installed at the center of the triangular roller frame (52). A limiting clamp (54) is installed on the outer edge of the triangular roller frame (52), and the limiting clamp (54) is provided with a clamping cavity for inserting the sand belt and preventing it from running off-center.

5. The grinding device for the outer wall of a wind turbine tower as described in claim 4, characterized in that: The triangular roller frame (52) is equipped with a pressure roller on the wind turbine tower surface side via a retaining spring (55), and the sand belt is fitted onto the pressure roller; The clamping spring (55) is used to press the sand belt against the surface of the wind turbine tower by means of the pressure roller.

6. The grinding device for the outer wall of a wind turbine tower as described in claim 4, characterized in that: The active joint unit (17) includes a first bearing seat (25) that is detachably mounted on the support plate (14) via a mounting plate (22), and a first synchronous pulley (24) is rotatably mounted in the first bearing seat (25) via a rotating shaft (23). A drive motor (11) is fixedly installed on the pallet (14), and the output shaft of the drive motor (11) is connected to the first synchronous pulley (24) via a transmission belt.

7. The grinding device for the outer wall of a wind turbine tower as described in claim 6, characterized in that: The deflection joint unit (15) includes a hollow sleeve shaft (36) rotatably mounted on the active arm via a second bearing seat (32), and a third synchronous pulley (33) is coaxially fixedly connected to the hollow sleeve shaft (36). The active arm is equipped with a second geared motor (13), and the output shaft of the second geared motor (13) is connected to the third synchronous pulley (33) via a transmission belt.

8. The grinding device for the outer wall of a wind turbine tower as described in claim 7, characterized in that: A shaft (35) is rotatably mounted at the center of the hollow sleeve shaft (36), and a second synchronous pulley (31) and a fourth synchronous pulley (34) are fixedly connected to both ends of the shaft (35) on the same axis. The first geared motor (12) is installed on the active arm, and the output shaft of the first geared motor (12) is connected to the fourth synchronous pulley (34) via a transmission belt.

9. The grinding device for the outer wall of a wind turbine tower as described in claim 8, characterized in that: The rotating joint unit (16) includes a third bearing seat (42) fixedly mounted on the driven arm, and a drive shaft (43) for coaxially connecting the connecting seat (53) is rotatably mounted in the third bearing seat (42). A fifth synchronous pulley (41) is coaxially connected to the drive shaft (43). A transmission belt is installed between the second synchronous pulley (31) and the fifth synchronous pulley (41).

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