Fan blade damage detection device

Abstract

The invention relates to the technical field of fan blade detection, in particular to a fan blade damage detection device which comprises a main support and a main walking mechanism arranged on the main support, and the main walking mechanism can move in the length direction of the main support; the auxiliary walking mechanism is installed on the main walking mechanism, and a phased array probe is installed on the auxiliary walking mechanism and used for driving the phased array probe to move in the direction perpendicular to the length direction of the main support; the crawling mechanism is installed at one end of the main support, a first vacuum suction cup is arranged on the crawling mechanism, and a second vacuum suction cup is arranged at the other end of the main support; through reasonable structural design and multi-mechanism cooperative work, overall movement control, precise positioning and safety monitoring of the device in the fan blade damage detection process are achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of fan blade detection, in particular to a fan blade damage detection device. BACKGROUND

[0002] As an important part of clean energy, wind power generation, as the core component of wind power generation equipment, its running state directly affects the power generation efficiency and equipment safety; due to the cracks, wear and tear and other damage of wind blade in the manufacturing, transportation and operation process, therefore, it is very important to detect the damage before the installation of the fan blade.

[0003] At present, the existing wind blade damage detection device still has many deficiencies in actual application. The main support of the traditional detection device is usually of fixed length structure, which is difficult to adapt to the detection needs of blades of different sizes; more importantly, the existing technology generally lacks effective control mechanism for the overall movement of the detection device. During the detection process, when the different areas of the blade need to be detected, the device needs to be manually disassembled and reinstalled, or the detection position needs to be changed through complex posture adjustment. This way not only is cumbersome to operate, but also greatly reduces the detection efficiency.

[0004] Therefore, it is urgent to provide a fan blade damage detection device to solve the above problems. SUMMARY

[0005] The purpose of the present application is to provide a fan blade damage detection device to solve the problems of insufficient overall movement control of the detection device and low detection efficiency in the prior art.

[0006] To achieve the above purpose, the present application provides the following technical scheme: A fan blade damage detection device, comprising: A main support and a main walking mechanism provided on the main support, the main walking mechanism being movable along the length direction of the main support; A sub-walking mechanism, the sub-walking mechanism being installed on the main walking mechanism, a phased array probe being installed on the sub-walking mechanism, the sub-walking mechanism being used to drive the phased array probe to move vertically to the length direction of the main support; A crawling mechanism, the crawling mechanism being installed on one end of the main support, and a first vacuum suction cup being provided on the crawling mechanism, a second vacuum suction cup being provided on the other end of the main support.

[0007] Preferably, the main walking mechanism comprises: A base, grooves being provided on both sides of the main support, the base being symmetrically provided with a driving wheel and a driven wheel, the driving wheel and the driven wheel being separated on both sides of the main support, and the driving wheel and the driven wheel being embedded in the corresponding grooves; An anti-skid rubber layer being provided on the outer circumferential surface of the driving wheel and the driven wheel, and uniform anti-skid lines being provided on the surface of the anti-skid rubber layer; The first servo motor is fixedly installed on the base, and an output shaft of the first servo motor is connected with the wheel shaft of the driving wheel.

[0008] Preferably, the base is provided with a sliding block, and a sliding groove is formed in the base and is perpendicular to the main support. A rotating rod is rotatably arranged on the base, penetrates the side wing plate formed by the sliding block, and is threadedly connected with the sliding block through a nut.

[0009] Preferably, the auxiliary walking mechanism comprises a linear sliding table module, and the linear sliding table module is fixedly installed on the base. The linear sliding table module is provided with a first double-shaft double-rod cylinder, and the phased array probe is installed at the output end of the first double-shaft double-rod cylinder.

[0010] Preferably, the crawling structure comprises: A first auxiliary support is formed with a sliding rod, and a guide groove is formed in the end of the main support and is connected with the sliding rod. Rollers are distributed on the sliding rod, and the rollers are in contact with the inner wall of the guide groove. A fixing frame is fixedly installed on the outer wall of the main support. One end of a threaded rod is rotatably connected with the first auxiliary support through a bearing, and the other end of the threaded rod penetrates the fixing frame. A sleeve is arranged on the threaded rod, and the sleeve is rotatably installed on the fixing frame. A nut is arranged in the sleeve and is threadedly connected with the threaded rod. A second servo motor is fixedly installed on the fixing frame, and the second servo motor is drivingly connected with the sleeve through a synchronous pulley set.

[0011] Preferably, the first auxiliary support is in a T-shaped perpendicular state with the main support. Second double-shaft double-rod cylinders are arranged at both ends of the first auxiliary support, and the first vacuum chuck is installed at the output end of the second double-shaft double-rod cylinders through a connecting frame.

[0012] Preferably, the main support comprises a second auxiliary support. The second auxiliary support is fixedly installed at one end of the main support, is in a T-shaped perpendicular state with the main support, and is away from the first auxiliary support. Third double-shaft double-rod cylinders are arranged at both ends of the second auxiliary support, and the second vacuum chuck is installed at the output end of the third double-shaft double-rod cylinders through a connecting frame.

[0013] Preferably, the damage detection device further comprises support wheels corresponding to the first auxiliary support and the second auxiliary support. The support wheels are arranged on the path in the length direction of the main support. A connecting rod is arranged on the support wheel, penetrates the corresponding auxiliary support plate body, and is fixed through a nut.

[0014] Preferably, the main support is provided with a grating ruler along the length direction, and the base is provided with a reading head matched with the grating ruler.

[0015] Preferably, the damage detection device further comprises a vacuum degree monitoring module in communication with the first vacuum chuck and the second vacuum chuck, for detecting the vacuum degree in the chucks in real time.

[0016] Compared with the prior art, the present application has the following beneficial effects: Through reasonable structural design and collaborative work of multiple mechanisms, the present application realizes overall movement control, accurate positioning and safety monitoring of the device in the process of detecting damage of the fan blade, effectively solves the problems of low detection efficiency, poor safety and insufficient positioning accuracy in the prior art, and provides reliable guarantee for efficient and safe detection of the wind blade. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a front view of the present application; Figure 2 is a perspective structural schematic view of the present application; Figure 3 is a partial structural schematic view of the present application; Figure 4 is an enlarged view of A of Figure 1 ; Figure 5 is an enlarged view of B of Figure 2 ; Figure 6 is an enlarged view of C of Figure 5 .

[0018] In the figure: 1-main support; 11-second auxiliary support; 12-third double-shaft double-rod air cylinder; 2-main walking mechanism; 21-base; 211-grating; 212-reading head; 22-driving wheel; 23-driven wheel; 231-sliding block; 232-rotary screw rod; 24-first servo motor; 3-auxiliary walking mechanism; 31-linear slide module; 32-first double-shaft double-rod air cylinder; 4-crawling mechanism; 41-first auxiliary support; 411-sliding rod; 42-fixed frame; 421-sleeve; 43-threaded rod; 44-second servo motor; 45-second double-shaft double-rod air cylinder; 5-first vacuum chuck; 6-second vacuum chuck; 7-supporting wheel; 71-connecting rod. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0021] The present invention proposes a fan blade damage detection device, such as Figures 1 to 6 As shown, the device mainly includes core components such as the main support 1, the main walking mechanism 2, the auxiliary walking mechanism 3, the crawling mechanism 4, the vacuum suction cup, the support wheel 7, the grating 211 and the vacuum monitoring module. These components work together to form a complete detection system. The main support 1 serves as the basic bearing structure of the device and provides a base for the installation and movement of each motion mechanism. The main walking mechanism 2 is set on the main support 1 and can move stably along the length direction of the main support 1. It includes a base 21, a driving wheel 22, a driven wheel 23 and a first servo motor 24; the driving wheel 22 and the driven wheel 23 symmetrically arranged on the base 21 are respectively embedded in the slide grooves on both sides of the main support 1. The outer peripheral surface of the driving wheel 22 and the driven wheel 23 is covered with a non-slip rubber layer with non-slip patterns, which can effectively increase the friction with the slide groove and avoid slipping during movement; the first servo motor 24 is fixed on the base 21, and its output shaft is connected to the wheel shaft of the driving wheel 22. The connection provides power for the rotation of the driving wheel 22, driving the main walking mechanism 2 to move smoothly along the main bracket 1; a slider 231 is also provided on the base 21, and a sliding groove perpendicular to the length direction of the main bracket 1 is opened on the surface of the base 21. The slider 231 forms a sliding connection with the sliding groove, and a screw rod 232 is rotatably provided on the base 21. The screw rod 232 passes through the side wing plate extended from one side of the slider 231, and is threadedly connected to the side wing plate through a nut. Rotating the screw rod 232 can drive the slider 231 to slide along the sliding groove, thereby realizing fine-tuning of the position of the slider 231.

[0022] The auxiliary walking mechanism 3 is installed on the base 21 of the main walking mechanism 2, and is used to drive the phased array probe (not shown in the figure) to move vertically to the length direction of the main support 1, so as to expand the detection range; the auxiliary walking mechanism 3 uses a linear slide module 31 as a moving basis, the linear slide module 31 is fixedly installed on the sliding block 231 of the base 21 and moves synchronously with the sliding block 231; the linear slide module 31 is provided with a first double-shaft double-rod air cylinder 32, the phased array probe is installed on the output end of the first double-shaft double-rod air cylinder 32, and through the translation of the linear slide module 31 and the extension and contraction of the double-shaft double-rod air cylinder, the position and the distance of the phased array probe from the blade surface can be flexibly adjusted, so as to adapt to the blade curved surface detection requirement; The crawling mechanism 4 is installed at one end of the main support 1, and is a core structure for realizing the overall movement control of the device, which includes a first auxiliary support 41, a fixed frame 42, a threaded rod 43, a sleeve 421 and a second servo motor 44. The sliding rod 411 on the first auxiliary support 41 is butted with the guide groove at the end of the main support 1, the roller on the sliding rod 411 is in contact with the inner wall of the guide groove, and the sliding friction is reduced; the fixed frame 42 is fixed to the outer wall of the main support 1, one end of the threaded rod 43 is rotatably connected with the first auxiliary support 41 through a bearing, the other end penetrates through the fixed frame 42, the sleeve 421 sleeved on the threaded rod 43 is threadedly connected with the threaded rod 43 through the internally nested nut, the second servo motor 44 drives the sleeve 421 to rotate through the synchronous pulley set, and then drives the threaded rod 43 to extend and retract, so as to realize the movement of the first auxiliary support 41 along the main support 1. In this process, the supporting wheel 7 is always in contact with the blade surface, providing stable support for the movement of the crawling mechanism 4, and ensuring that the overall structure will not tilt or shake when moving.

[0023] As Figure 1 and Figure 2As shown, in order to ensure the stable fit of the device with the blade surface and the controllability of the overall movement, the main support 1 is provided with vacuum suction cups at both ends through the first auxiliary support 41 and the second auxiliary support 11. The first auxiliary support 41 and the second auxiliary support 11 are in a T-shaped vertical state with the main support 1, and are away from each other, and both ends thereof are connected with the vacuum suction cups through the second double-shaft double-rod air cylinder 45 and the third double-shaft double-rod air cylinder 12. The double-shaft double-rod air cylinder can flexibly adjust the fit degree of the suction cup with the blade surface. When the first auxiliary support 41 is extended by the crawling mechanism 4, the first vacuum suction cup 5 will first be separated from the blade surface, so as to avoid limiting movement or scratching the blade due to adsorption force during the extension process; after the first auxiliary support 41 is extended and reaches the target position, the second double-shaft double-rod air cylinder 45 drives the first vacuum suction cup 5 to re-adhere to the blade surface and generate negative pressure, so as to realize stable adsorption. In the subsequent retraction stage, the first vacuum suction cup 5 remains in the fixed adsorption state, and the second vacuum suction cup 6 is first separated from the blade surface. At this time, the first auxiliary support 41 is retracted by the threaded rod 43, and under the action of the fixed pulling force of the first vacuum suction cup 5, the main support 1 will drive the second auxiliary support 11 to move towards the first auxiliary support 41, so as to complete the adjustment of the overall position of the device.

[0024] As shown in Figure 1 and Figure 5 , the damage detection device is also provided with a support wheel 7, which is arranged on the main support 1 in the length direction path corresponding to the first auxiliary support 41 and the second auxiliary support 11. The connecting rod 71 on the support wheel 7 is a threaded rod 43 structure, which is fixed after penetrating through the plate body of the corresponding auxiliary support through a butterfly nut. The butterfly nut can be screwed to adjust the distance between the support wheel 7 and the auxiliary support, so as to realize the fine adjustment of the height of the support wheel 7. During the entire detection and movement process, the support wheel 7 is always in contact with the blade surface, which reduces the deformation of the main support 1 due to its own weight or adsorption force, and further enhances the stability of the overall structure.

[0025] As shown in Figure 4 , further, in order to improve the detection positioning accuracy, the main support 1 is provided with a grating 211 ruler along the length direction, and the base 21 of the main walking mechanism 2 is provided with a reading head 212 matched with the grating 211 ruler, which can feedback the position coordinates of the main walking mechanism 2 in real time, so as to provide accurate positioning data for the detection path of the phased array probe. In addition, the device is also equipped with a vacuum degree monitoring module (not shown in the figure), which is in communication with all the vacuum suction cups, and can detect the vacuum degree in the suction cup in real time, and timely issue a warning when the suction cup is separated or the vacuum degree is insufficient, so as to ensure the safety of the detection process.

[0026] Work flow: In the use of the fan blade damage detection device, first of all, the device is moved to the vicinity of the blade to be detected, the position of the first vacuum chuck 5 and the second vacuum chuck 6 is adjusted by the second double-shaft double-rod cylinder 45, and the butterfly nut of the supporting wheel 7 is screwed to adjust the height of the supporting wheel 7 to make it fit the surface of the blade. The vacuum system is started to generate negative pressure in the chuck, and the device is preliminarily fixed on the surface of the blade. At this time, the supporting wheel 7 provides auxiliary support for the device.

[0027] After starting the vacuum degree monitoring module and confirming that the vacuum degree of all vacuum chucks meets the safety standard, the overall position adjustment is started according to the position of the area to be detected: first, the first vacuum chuck 5 is separated from the surface of the blade by controlling the second double-shaft double-rod cylinder 45, while the second vacuum chuck 6 remains in the adsorbed state; the second servo motor 44 is started to drive the sleeve 421 to rotate through the synchronous pulley set, the nut in the sleeve 421 is threadedly connected with the threaded rod 43, the threaded rod 43 is driven to extend, and the first auxiliary support 41 is driven to slide outward along the guide groove of the main support 1. At this time, the supporting wheel 7 moves with the first auxiliary support 41 and continues to support, avoiding the inclination of the device; when the first auxiliary support 41 reaches the predetermined extension position, the first vacuum chuck 5 is reattached to the surface of the blade by the second double-shaft double-rod cylinder 45. After the vacuum degree monitoring module confirms that the first vacuum chuck 5 is firmly adsorbed, the second vacuum chuck 6 is separated from the surface of the blade; then the second servo motor 44 is reversely rotated to drive the threaded rod 43 to retract. Under the fixed tension of the first vacuum chuck 5, the main support 1 drives the second auxiliary support 11 to move towards the first auxiliary support 41 until the overall device reaches the target detection area. At this time, the second vacuum chuck 6 re-adsorbs the surface of the blade, and the overall position adjustment is completed.

[0028] After the device is fixed, the first servo motor 24 of the main walking mechanism 2 is started, the first servo motor 24 drives the driving wheel 22 to rotate, and under the friction force of the anti-skid rubber layer, the driving wheel 22 and the driven wheel 23 move smoothly along the sliding groove of the main support 1, driving the base 21 and the auxiliary walking mechanism 3 to move along the length direction of the main support 1; at the same time, the grating 211 and the reading head 212 cooperate to feedback the position information of the main walking mechanism 2 in real time. In the moving process of the main walking mechanism 2, the linear slide table module 31 of the auxiliary walking mechanism 3 drives the phased array probe to move in the direction perpendicular to the main support 1, and the first double-shaft double-rod cylinder 32 adjusts the distance between the phased array probe and the surface of the blade according to the curvature of the blade surface to ensure that the probe is always in the best detection position.

[0029] During the whole detection process, the vacuum degree monitoring module continuously monitors the vacuum degree of the suction cup. If the vacuum degree is abnormal, a warning will be sent in time. The grating 211 records the position coordinates of the phased array probe in real time, ensuring that the damage position can be accurately traced. After the detection of a region is completed, the operation process of the crawling mechanism 4 can be repeated, the overall position of the device is adjusted again, and the detection of other regions is continued to realize the comprehensive coverage of the surface of the blade. After the detection is completed, the vacuum system is turned off, the suction cup is separated from the surface of the blade, and the detection work is completed.

[0030] The contents not described in detail in the specification belong to the prior art known to those skilled in the art.

[0031] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for part of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A wind turbine blade damage detection device, characterized in that: include: A main support (1) and a main traveling mechanism (2) arranged on the main support (1), wherein the main traveling mechanism (2) is movable along the length direction of the main support (1); A secondary walking mechanism (3), the secondary walking structure being mounted on the main walking structure, and a phased array probe being mounted on the secondary walking structure for driving the phased array probe to move in a vertical direction of the length of the main support (1); A crawling mechanism (4) is mounted on one end of the main support (1), and a first vacuum suction cup (5) is provided on the crawling structure, and a second vacuum suction cup (6) is provided on the other end of the main support (1).

2. A wind turbine blade damage detection device according to claim 1, characterized in that: The main traveling mechanism (2) comprises: A base (21), wherein both sides of the main bracket (1) are provided with a slide groove, and a driving wheel (22) and a driven wheel (23) are symmetrically arranged on the base (21), the driving wheel (22) and the driven wheel (23) are separated on both sides of the main bracket (1), and the driving wheel (22) and the driven wheel (23) are respectively embedded in the corresponding slide groove; The outer circumferences of the driving wheel (22) and the driven wheel (23) are covered with an anti-skid rubber layer, and the surface of the anti-skid rubber layer is provided with evenly distributed anti-skid patterns; A first servo motor (24) is fixedly mounted on the base (21), and an output shaft of the first servo motor (24) is connected to the axle of the driving wheel (22).

3. A wind turbine blade damage detection device according to claim 2, characterized in that: The base (21) is provided with a slider (231), the base (21) is provided with a slide groove, the direction of the slide groove is perpendicular to the main bracket (1), and the slider (231) is slidably connected to the slide groove; A screw rod (232) is rotatably provided on the base (21), and the screw rod (232) passes through the side wing plate formed by the slider (231) and is threadedly connected to the side wing plate via a nut.

4. A wind turbine blade damage detection device according to claim 2, characterized in that: The auxiliary walking mechanism (3) includes a linear slide module (31), and the linear slide module (31) is fixedly mounted on the base (21); A first dual-axis dual-rod cylinder (32) is provided on the linear slide module (31), and the phased array probe is installed at the output end of the first dual-axis dual-rod cylinder (32).

5. The wind turbine blade damage detection device according to claim 1, characterized in that: The crawling structure comprises: A first sub-bracket (41), wherein a sliding rod (411) is formed on the first sub-bracket (41), a guide groove for docking with the sliding rod (411) is formed at the end of the main bracket (1), and a roller is distributed on the sliding rod (411), and the roller contacts the inner wall of the guide groove; A fixing frame (42), wherein the fixing frame (42) is fixedly mounted on the outer wall of the main support (1); a threaded rod (43), one end of the threaded rod (43) being rotatably connected to the first auxiliary bracket (41) via a bearing, and the other end of the threaded rod (43) passing through the fixed frame (42); A sleeve (421) is sleeved on the threaded rod (43), and the sleeve (421) is rotatably mounted on the fixing frame (42). A nut is nested inside the sleeve (421), and the nut is threadedly connected to the threaded rod (43). A second servo motor (44) is fixedly mounted on the fixing frame (42), and the second servo motor (44) is transmission-connected to the sleeve (421) via a synchronous pulley set.

6. The wind turbine blade damage detection device according to claim 5, characterized in that: The first auxiliary bracket (41) and the main bracket (1) are in a T-shaped vertical state; A second dual-axis dual-rod cylinder (45) is provided at both ends of the first auxiliary bracket (41), and the first vacuum suction cup (5) is mounted on the output end of the second dual-axis dual-rod cylinder (45) via a connecting frame.

7. The wind turbine blade damage detection device according to claim 6, characterized in that: The main bracket (1) includes a second sub-bracket (11), the second sub-bracket (11) is fixedly mounted on one end of the main bracket (1), the second sub-bracket (11) and the main bracket (1) are in a T-shaped vertical state, and the second sub-bracket (11) is away from the first sub-bracket (41); A third dual-axis dual-rod cylinder (12) is provided at both ends of the second auxiliary bracket (11), and the second vacuum suction cup (6) is mounted on the output end of the third dual-axis dual-rod cylinder (12) via a connecting frame.

8. The wind turbine blade damage detection device according to claim 7, characterized in that: The damage detection device further comprises a support wheel (7), the support wheel (7) corresponding to the first auxiliary bracket (41) and the second auxiliary bracket (11), respectively, and the support wheel (7) is located on a lengthwise path of the main bracket (1); The support wheel (7) is provided with a connecting rod, which passes through the corresponding auxiliary bracket plate and is fixed by a nut.

9. The wind turbine blade damage detection device according to claim 2, characterized in that: A grating ruler (211) is provided on the main bracket (1) along the length direction, and a reading head (212) that cooperates with the grating ruler (211) is provided on the base (21).

10. The wind turbine blade damage detection device according to claim 1, characterized in that: The damage detection device further comprises a vacuum degree monitoring module, which is in communication with the first vacuum suction cup (5) and the second vacuum suction cup (6) and is used for detecting the vacuum degree in the suction cups in real time.

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