Auxiliary positioning device of impeller imbalance off-line detection equipment

Abstract

The utility model provides an auxiliary positioning device of an impeller imbalance off-line detection device, which comprises a fixed seat, a vertical adjusting plate, a horizontal adjusting plate and a laser, a lower bottom plate of the fixed seat is arranged on a tripod, a camera is fixed on the lower bottom plate of the fixed seat, the vertical adjusting plate is vertically fixed on an upper bottom plate of the fixed seat, and the horizontal adjusting plate is vertically fixed on the upper bottom plate of the fixed seat. The horizontal adjusting plate is locked on the vertical adjusting plate, and the horizontal adjusting plate is subjected to up-down deflection adjustment; the two laser devices are locked on the horizontal adjusting plate, left-right deflection adjustment is carried out on the laser emission center lines of the two laser devices, and the two laser devices deflect with the second center fixing hole as the fixed circle center when deflecting left and right. The auxiliary positioning device positions the mounting position and angle of the camera, and ensures that the right ahead of the shooting center line of the camera is just the center position of the connecting line of the blade and the tower drum, so that the accuracy of clearance data shot by the camera is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of impeller imbalance detection for wind turbine generator sets, in particular to an auxiliary positioning device for impeller imbalance offline detection equipment. Background Art

[0002] With the rapid development of wind power in China, wind turbine capacity continues to increase, and blades are becoming longer and longer. This increases their swept area, weight, and moment of inertia, leading to increasing wind turbine failures. Vibration failures, in particular, directly impact the mechanical performance and lifespan of wind turbines. Blades absorb energy and provide the turbine's power. Aerodynamic imbalance in blades creates additional loads or load imbalances, reducing power generation efficiency and the turbine's power curve. It can also damage key components such as the pitch system, drive train, and yaw system. A significant portion of blade aerodynamic imbalance is caused by zero-scale deviation during installation and is generally not recurring. Therefore, offline methods are often used to detect blade aerodynamic imbalance. Currently, machine vision-based offline clearance imbalance detection is a common method. This method images the blades and tower directly below or from the side of the blades, identifying the clearance difference between the three blades to determine whether the impeller is aerodynamically unbalanced. When geographical conditions permit, side-on photography generally offers greater accuracy and safety. Offline testing equipment measures the distance between the blades and the tower during operation from the side of the wind turbine to calculate the headroom value. When shooting from the side, the optimal shooting angle for offline testing equipment is the centerline of the blade-tower connection, resulting in relatively high headroom measurement accuracy. However, during installation, it can be difficult to ensure that the offline testing equipment's shooting angle is precisely aligned with the centerline of the blade-tower connection, which can affect the accuracy of headroom measurement. Summary of the Invention

[0003] The utility model provides an auxiliary positioning device for an impeller imbalance offline detection device. The auxiliary positioning device is based on a laser and the vertical adjustment plate and horizontal adjustment plate carried thereon to position the installation position and angle of the camera in the offline detection device, ensuring that the front of the camera's shooting center line is exactly the center position of the line connecting the blade and the tower, thereby ensuring the accuracy of the clearance data captured by the camera.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] An auxiliary positioning device for an impeller imbalance offline detection device, the impeller imbalance detection device comprising at least a tripod and a camera, the auxiliary positioning device comprising:

[0006] The fixing base includes a lower base plate, an upper base plate, and a support plate connected between the lower base plate and the upper base plate. The lower base plate is mounted on the tripod, and the camera is fixed to the lower base plate. The camera and the fixing base can be adjusted up and down and left and right on the tripod together.

[0007] A vertical adjustment plate, which is vertically fixed to the upper base plate of the fixing base and arranged along the shooting centerline of the camera. The vertical adjustment plate is provided with a first central fixing hole and a first arc-shaped adjustment hole. The first arc-shaped adjustment hole is arranged in a vertical direction and is arranged with the first central fixing hole as the center of the circle.

[0008] The horizontal adjustment plate is mounted on the vertical adjustment plate and is locked to the vertical adjustment plate by means of a locking bolt provided in the first central fixing hole and the first arc-shaped adjustment hole. The horizontal adjustment plate is adjusted up and down by adjusting the position of the locking bolt on the first arc-shaped adjustment hole. The horizontal adjustment plate is provided with a second central fixing hole and a second arc-shaped adjustment hole. The second arc-shaped adjustment hole is arranged in a direction perpendicular to the vertical adjustment plate and is arranged with the second central fixing hole as the center of a circle. The centerline of the second central fixing hole and the shooting centerline of the camera are in a vertical plane.

[0009] Two lasers are provided, and both lasers are locked on the horizontal adjustment plate by locking bolts provided in the second center fixing hole and the second arc-shaped adjustment hole. The laser sources of the two lasers are in the same direction as the camera head, and the two lasers are respectively located on both sides of the vertical adjustment plate; by adjusting the position of the locking bolt on the second arc-shaped adjustment hole, the laser emission center lines of the two lasers are adjusted to the left and right, and when the two lasers deflect to the left and right, they deflect with the second center fixing hole as the fixed center.

[0010] The fixing seat is a frame structure in the shape of a square.

[0011] With the horizontal line of the camera shooting direction as the 0° reference line, the central angle of the first arc-shaped adjustment hole is -30° to 90°.

[0012] The horizontal adjustment plate is provided with a through hole for the vertical adjustment plate to pass through and a first mounting hole for lockingly connecting with the first central fixing hole and the first arc-shaped adjustment hole.

[0013] The bottom of the horizontal adjustment plate is located on one side of the through hole and is connected to two ear plates, and the two first mounting holes are respectively arranged on the two ear plates, and the distance between the two first mounting holes is consistent with the radius distance between the first center fixing hole and the first arc-shaped adjustment hole.

[0014] The second arc-shaped adjustment holes are symmetrically arranged on both sides of the vertical adjustment plate.

[0015] The rear ends of the two lasers are locked together on the second central fixing hole of the horizontal adjustment plate through locking bolts, and the front ends of the two lasers are locked respectively on the second arc-shaped adjustment holes of the horizontal adjustment plate through two locking bolts.

[0016] The lasers are all installed on a laser bracket, and the front and rear ends of the laser bracket are provided with second mounting holes for connecting with the second center fixing hole and the second arc adjustment hole, and the distance between the two second mounting holes on the same laser bracket is consistent with the radial distance between the second center fixing hole and the second arc adjustment hole.

[0017] The two laser brackets are symmetrically arranged on both sides of the vertical adjustment plate. The laser brackets include a front mounting support, a rear mounting support and a mounting plate that are connected as one body. The mounting plate is obliquely connected to the front mounting support and the rear mounting support, and the front end of the mounting plate is inclined toward the vertical adjustment plate. The front mounting supports are locked in the second arc-shaped adjustment hole, and the rear mounting supports are locked on the second center fixing hole. The laser is fixed on the mounting plate.

[0018] When the auxiliary positioning device assists in camera positioning, it requires that both lasers deviate from the center at the same angle.

[0019] Compared with the prior art, the beneficial effects of the present invention are: (1) In the present invention, the camera is positioned by an auxiliary positioning device to ensure that when the camera detects the imbalance of the impeller on the side of the wind turbine, the front of the camera's shooting center line is exactly the center position of the line connecting the blade and the tower, thereby ensuring the accuracy of the clearance data captured by the camera.

[0020] (2) The auxiliary positioning device in the present invention uses two lasers to position the camera, and the two lasers are installed on the vertical adjustment plate and the horizontal adjustment plate, which can be adjusted up and down and left and right to facilitate the positioning of the camera.

[0021] (3) The laser bracket in the present invention is a special-shaped sheet structure, which is inclined to both sides of the vertical support plate, ensuring that when the two laser brackets rotate around the same fixed center, they avoid the middle vertical support plate and do not interfere with each other or with other structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Installation diagram of the auxiliary positioning device provided by the utility model Figure 1 ;

[0023] Figure 2 Installation diagram of the auxiliary positioning device provided by the utility model Figure 2 ;

[0024] Figure 3This is a schematic diagram of the connection between the fixing base and the vertical adjustment plate of the auxiliary positioning device in the present invention;

[0025] Figure 4 Schematic diagram of the connection between the vertical adjustment plate and the horizontal adjustment plate of the auxiliary positioning device in this utility model Figure 1 ;

[0026] Figure 5 Schematic diagram of the connection between the vertical adjustment plate and the horizontal adjustment plate of the auxiliary positioning device in this utility model Figure 2 ;

[0027] Figure 6 This is a schematic diagram of the connection between the laser bracket and the horizontal adjustment plate of the auxiliary positioning device in the present utility model;

[0028] Figure 7 This is a schematic diagram of the structure of the laser bracket in the utility model;

[0029] Figure 8 A schematic diagram of the principle of positioning a camera using the auxiliary positioning device provided by the utility model;

[0030] In the figure, 1-camera, 2-fixing base, 21-lower base plate, 22-upper base plate, 23-support plate, 3-vertical adjustment plate, 31-first center fixing hole, 32-first arc adjustment hole, 4-horizontal adjustment plate, 41-through hole, 42-first mounting hole, 43-second center fixing hole, 44-second arc adjustment hole, 5-laser, 6-laser bracket, 61-front mounting support, 62-rear mounting support, 63-mounting plate, 64-second mounting hole, 65-laser mounting hole. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0032] The utility model provides an auxiliary positioning device for an impeller imbalance offline detection device, and its installation diagram is as follows: Figure 1 In this embodiment, the impeller imbalance detection device includes at least a tripod (not shown) and a camera 1, and an auxiliary positioning device is used to assist in positioning the camera, such as Figure 1 and Figure 2 As shown, the camera's shooting angle is just toward the center line of the line connecting the blade and the tower.

[0033] In this embodiment, the auxiliary positioning device includes a fixing base 2, a vertical adjustment plate 3, a horizontal adjustment plate 4 and a laser 5. The fixing base is a frame structure in the shape of a square, including a lower base plate 21, an upper base plate 22 and two support plates 23 connected between the lower base plate and the upper base plate. The lower base plate is installed on a tripod so that the fixing base is located on the tripod. At this time, the fixing base can be moved and adjusted on the tripod. The camera is fixed on the lower base plate, such as Figure 3 As shown, the camera and mounting bracket can be adjusted together on the tripod. With the tripod fixed in place, the camera and mounting bracket can be tilted up and down, left and right. When securing the camera, be sure to avoid the support plate obstructing the camera lens. For offline impeller imbalance testing, place the tripod to the side of the wind turbine and adjust the mounting bracket so the camera's angle faces the wind turbine.

[0034] The vertical adjustment plate is fixed vertically on the upper base plate of the fixing seat, and the vertical adjustment plate is arranged along the shooting center line direction of the camera. Figure 3 A first central fixing hole 31 and a first arc-shaped adjustment hole 32 are provided on the vertical adjustment plate. The first arc-shaped adjustment hole is arranged vertically, and the first arc-shaped adjustment hole is arranged with the first central fixing hole as the center of the circle. Specifically, the horizontal line of the camera shooting direction is taken as the 0° reference line, and the central angle of the first arc-shaped adjustment hole is -30°~90°.

[0035] The horizontal adjustment plate is sleeved on the vertical adjustment plate and locked on the vertical adjustment plate through the first central fixing hole and the locking bolt (not shown in the figure) set in the first arc adjustment hole. By adjusting the position of the locking bolt on the first arc adjustment hole, the horizontal adjustment plate can be adjusted up and down. Figure 4 and Figure 5 As shown; specifically, the horizontal adjustment plate is provided with a through hole 41 for the vertical adjustment plate to pass through and a first mounting hole 42 for lockingly connecting with the first center fixing hole and the first arc-shaped adjustment hole; further, the bottom of the horizontal adjustment plate is located on one side of the through hole and is connected with two ear plates, and the two first mounting holes are respectively provided on the two ear plates, and the distance between the two first mounting holes is consistent with the radius distance between the first center fixing hole and the first arc-shaped adjustment hole, so that the two first mounting holes are aligned with the first center fixing hole and the first arc-shaped adjustment hole, respectively, and then locked respectively by locking bolts.

[0036] In this embodiment, the horizontal adjustment plate is provided with a second central fixing hole 43 and a second arc-shaped adjustment hole 44. The second arc-shaped adjustment hole is arranged in a direction perpendicular to the vertical adjustment plate, and the second arc-shaped adjustment hole is arranged with the second central fixing hole as the center of the circle. Specifically, the second arc-shaped adjustment holes are symmetrically arranged on both sides of the vertical adjustment plate, that is, the second arc-shaped adjustment holes are symmetrically arranged on both sides of the through hole. Figure 5The center line of the second center fixing hole and the camera's shooting center line are in a vertical plane, ensuring that the fixed center of the laser installed later when it swings left and right is the camera's shooting center line.

[0037] There are two lasers, both of which are locked on the horizontal adjustment plate through the locking bolts (not shown) set in the second central fixing hole and the second arc-shaped adjustment hole. The laser sources of the two lasers are in the same direction as the camera head, and the two lasers are located on both sides of the vertical adjustment plate. Figure 1 and Figure 2 By adjusting the position of the locking bolt on the second arc-shaped adjustment hole, the laser emission center lines of the two lasers can be adjusted to swing left and right respectively, and the two lasers swing left and right with the second center fixing hole as the fixed center. Specifically, the rear ends of the two lasers are locked together on the second center fixing hole by a locking bolt, and the front ends of the two lasers are locked in the second arc-shaped adjustment hole by two locking bolts. It should be noted that the consistent orientation mentioned here refers to the overall orientation, that is, after the tripod is in position, the laser source of the laser and the camera head of the camera are both facing the direction of the wind turbine. Specifically, the lasers are both mounted on the laser bracket 6, as shown Figure 6 and Figure 7 As shown, the laser bracket includes a front mounting support 61, a rear mounting support 62, and a mounting plate 63, which are connected together. The mounting plate is obliquely connected to the front and rear mounting supports, with the front end of the mounting plate tilted toward the vertical adjustment plate. The front mounting supports are locked into the second arc-shaped adjustment hole, and the rear mounting supports are locked into the second center fixing hole. The laser is fixed to the mounting plate. It is important to note that since the two lasers are located on either side of the vertical adjustment plate, the two laser brackets on either side are symmetrically arranged, that is, the two laser brackets are symmetrically arranged on either side of the vertical adjustment plate. In this embodiment, the front and rear ends of the laser bracket (the front mounting support and the rear mounting support) are each provided with a second mounting hole 64 for connecting with the second center fixing hole and the second arc-shaped adjustment hole. The distance between the two second mounting holes on the same laser bracket is consistent with the radial distance between the second center fixing hole and the second arc-shaped adjustment hole. Furthermore, the laser bracket (mounting plate) is provided with a laser mounting hole 65, and the laser is connected to the laser bracket via bolts. When the two lasers are tilted left and right until the angles between the two lasers and the vertical adjustment plate are equal, the lasers can be emitted at the same angle relative to the shooting center line of the camera.

[0038] The working principle of the auxiliary positioning device provided in this embodiment is as follows: the camera is installed on the fixing seat of the auxiliary positioning device, and then the auxiliary positioning device is installed as a whole on the tripod, and the tripod is placed on the side of the wind turbine. The auxiliary positioning device is tilted up and down and left and right (coarse adjustment) on the tripod so that the shooting angle of the camera is facing the wind turbine, and then the locking bolts on the horizontal adjustment plate and the vertical adjustment plate are adjusted to tilt the horizontal adjustment plate up and down so that the height of the laser emitted by the laser can reach the blade, and the locking bolts of the two lasers are adjusted to tilt the two lasers left and right, and the angles between the two lasers and the vertical adjustment plate are equal. While adjusting the lasers, the fixing seat is tilted left and right on the tripod (fine adjustment) until the lasers emitted by the two lasers just hit the edge of the tower close to the blade and the edge of the blade close to the tower respectively. The positioning of the camera is completed. At this time, the front of the camera shooting center line is the center position of the line connecting the blade and the tower, as shown in FIG. Figure 8 As shown, the accuracy of the clearance data captured by the camera is ensured, so as to accurately judge the imbalance detection of the impeller. Figure 8 The middle measurement position is the positioning position of the camera and the auxiliary positioning device. The two lasers emitted from the measurement position are at the same angle and hit the left and right measuring points (tower and blade) respectively. Since the two lasers in this application have the same angle, the lasers can be emitted at the same angle relative to the shooting center line of the camera. Therefore, the midpoint of the left and right measuring points is the shooting center line of the camera.

Claims

1. An auxiliary positioning device for an off-line impeller imbalance detection device, wherein the impeller imbalance detection device comprises at least a tripod and a camera, and is characterized by: The auxiliary positioning device comprises: The fixing base includes a lower base plate, an upper base plate, and a support plate connected between the lower base plate and the upper base plate. The lower base plate is mounted on the tripod, and the camera is fixed to the lower base plate. The camera and the fixing base can be adjusted up and down and left and right on the tripod together. A vertical adjustment plate, which is vertically fixed to the upper base plate of the fixing base and arranged along the shooting centerline of the camera. The vertical adjustment plate is provided with a first central fixing hole and a first arc-shaped adjustment hole. The first arc-shaped adjustment hole is arranged in a vertical direction and is arranged with the first central fixing hole as the center of the circle. The horizontal adjustment plate is mounted on the vertical adjustment plate and is locked to the vertical adjustment plate by means of a locking bolt provided in the first central fixing hole and the first arc-shaped adjustment hole. The horizontal adjustment plate is adjusted up and down by adjusting the position of the locking bolt on the first arc-shaped adjustment hole. The horizontal adjustment plate is provided with a second central fixing hole and a second arc-shaped adjustment hole. The second arc-shaped adjustment hole is arranged in a direction perpendicular to the vertical adjustment plate and is arranged with the second central fixing hole as the center of a circle. The centerline of the second central fixing hole and the shooting centerline of the camera are in a vertical plane. Two lasers are provided, and both lasers are locked on the horizontal adjustment plate by locking bolts provided in the second center fixing hole and the second arc-shaped adjustment hole. The laser sources of the two lasers are in the same direction as the camera head, and the two lasers are respectively located on both sides of the vertical adjustment plate; by adjusting the position of the locking bolt on the second arc-shaped adjustment hole, the laser emission center lines of the two lasers are adjusted to the left and right, and when the two lasers deflect to the left and right, they deflect with the second center fixing hole as the fixed center.

2. The auxiliary positioning device of the impeller imbalance offline detection equipment according to claim 1, characterized in that: The fixing seat is a frame structure in the shape of a square.

3. The auxiliary positioning device of the impeller imbalance offline detection equipment according to claim 1, characterized in that: With the horizontal line of the camera shooting direction as the 0° reference line, the central angle of the first arc-shaped adjustment hole is -30° to 90°.

4. The auxiliary positioning device of the impeller imbalance offline detection equipment according to claim 1, characterized in that: The horizontal adjustment plate is provided with a through hole for the vertical adjustment plate to pass through and a first mounting hole for lockingly connecting with the first central fixing hole and the first arc-shaped adjustment hole.

5. The auxiliary positioning device of the impeller imbalance offline detection equipment according to claim 4, characterized in that: The bottom of the horizontal adjustment plate is located on one side of the through hole and is connected to two ear plates, and the two first mounting holes are respectively arranged on the two ear plates, and the distance between the two first mounting holes is consistent with the radius distance between the first center fixing hole and the first arc-shaped adjustment hole.

6. The auxiliary positioning device of the impeller imbalance offline detection equipment according to claim 1, characterized in that: The second arc-shaped adjustment holes are symmetrically arranged on both sides of the vertical adjustment plate.

7. The auxiliary positioning device of the impeller imbalance offline detection equipment according to claim 1, characterized in that: The rear ends of the two lasers are locked together on the second central fixing hole of the horizontal adjustment plate through locking bolts, and the front ends of the two lasers are locked respectively on the second arc-shaped adjustment holes of the horizontal adjustment plate through two locking bolts.

8. The auxiliary positioning device of the impeller imbalance offline detection equipment according to claim 1, characterized in that: The lasers are all installed on a laser bracket, and the front and rear ends of the laser bracket are provided with second mounting holes for connecting with the second center fixing hole and the second arc adjustment hole, and the distance between the two second mounting holes on the same laser bracket is consistent with the radial distance between the second center fixing hole and the second arc adjustment hole.

9. The auxiliary positioning device of the impeller imbalance offline detection equipment according to claim 8, characterized in that: The two laser brackets are symmetrically arranged on both sides of the vertical adjustment plate. The laser brackets include a front mounting support, a rear mounting support and a mounting plate that are connected as one body. The mounting plate is obliquely connected to the front mounting support and the rear mounting support, and the front end of the mounting plate is inclined toward the vertical adjustment plate. The front mounting supports are locked in the second arc-shaped adjustment hole, and the rear mounting supports are locked on the second center fixing hole. The laser is fixed on the mounting plate.

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