A detection device for axial flow fan blades

Abstract

This utility model discloses a testing device for axial flow fan blades, comprising: a positioning and rotating device, which includes a fan blade positioning mechanism and a rotation drive mechanism. The fan blade positioning mechanism is used to install and position the axial flow fan blade, and the rotation drive mechanism can drive the fan blade positioning mechanism to rotate along the rotation axis to drive the axial flow fan blade to rotate; and a vision inspection device, which is located beside the positioning and rotating device. The vision inspection device includes a vision inspection camera, which can be positioned directly above and below the fan blade positioning mechanism in the height direction. When the vision inspection camera is located above the blade, it can obtain the highest point height of the blade; when the vision inspection camera is located below the blade, it can obtain the lowest point height of the blade. By setting the positioning and rotating device to install and drive the axial flow fan blade to rotate, and setting the detection height of the vision inspection device, the height and axial runout of the axial flow fan blade can be automatically detected, replacing manual operation and making the detection results more accurate and stable.

Description

Technical Field

[0001] This utility model relates to the field of axial flow fan blade testing technology, and in particular to a testing device for axial flow fan blades. Background Technology

[0002] Axial flow fan blades are commonly used components of axial flow fans. Before leaving the factory, it is necessary to test whether the blade height and axial runout of multiple blades are within the standard range. The current testing method involves manually rotating the axial flow fan blade so that the highest point of each blade passes through the high-point gap between the high-point gauges, and the lowest point passes through the low-point gap between the low-point gauges. If the highest and lowest points of the blades can pass through the high-point and low-point gaps respectively, it indicates that the height and axial runout of the axial flow fan blade are within the standard range. However, this testing method relies on manual rotation of the fan blades and inspection, which is labor-intensive and prone to human error. Those skilled in the art desire an automated testing device that can replace manual inspection. Utility Model Content

[0003] The main purpose of this invention is to propose a detection device for axial flow fan blades, which aims to solve the technical problems of high labor costs and easy human error in the existing technology of manually detecting the height and axial runout of axial flow fan blades.

[0004] To achieve the above objectives, this utility model proposes a testing device for axial flow fan blades, comprising:

[0005] A positioning and rotating device includes a blade positioning mechanism and a rotation drive mechanism. The blade positioning mechanism is used to install and position axial flow blades. The rotation drive mechanism is connected to the blade positioning mechanism. The blade positioning mechanism has a vertically arranged rotation axis. The rotation drive mechanism can drive the blade positioning mechanism to rotate along the rotation axis to drive the axial flow blades to rotate.

[0006] A visual inspection device is disposed beside the positioning and rotating device. The visual inspection device includes a visual inspection camera. The visual inspection camera can be directly facing the upper and lower sides of the fan blade positioning mechanism in the height direction. When the visual inspection camera is above the fan blade positioning mechanism, it can inspect the upper side of the axial fan blade. When the visual inspection camera is below the fan blade positioning mechanism, it can inspect the lower side of the axial fan blade.

[0007] The axial flow fan blade to be inspected is installed and fixed on the blade positioning mechanism. Then, the axial flow fan blade is rotated to the inspection position. When the visual inspection camera is located above the blade, it can acquire the highest point height of the blade; when it is located below the blade, it can acquire the lowest point height. The axial flow fan blade is rotated further to the next inspection position and inspected. Based on the highest and lowest point heights of multiple blades, it can be determined whether the height and axial runout of the axial flow fan blade are within the standard range. This invention, by setting a positioning and rotating device to install and drive the axial flow fan blade, and by setting a detection height for the visual inspection device, can automatically detect the height and axial runout of the axial flow fan blade, replacing manual inspection and making the inspection results more accurate and stable.

[0008] Preferably, the visual inspection device further includes a visual up-and-down driving device, and the visual inspection camera is disposed on the moving end of the visual up-and-down driving device, which can drive the visual inspection camera to move up and down.

[0009] The vision up-and-down drive device can move the vision inspection camera up and down, and can adjust the vision inspection camera to a suitable inspection position to improve inspection accuracy. When there is only one vision inspection camera, the vision up-and-down drive device can move the vision inspection camera to the upper and lower sides of the blade for inspection. It can also adapt to the inspection of axial flow fan blades of different heights, increasing the applicability of the inspection equipment.

[0010] Preferably, the number of visual inspection cameras is two, with the two cameras respectively positioned above and below the blade positioning mechanism. The two visual inspection cameras can inspect the upper and lower sides of the blade separately, eliminating the need for one camera to move up and down to switch between the upper and lower sides, thus improving inspection efficiency.

[0011] Preferably, the visual inspection device further includes a forward / backward driving device and a left / right driving device. The visual inspection device and the positioning and rotating device are arranged side-by-side. The up / down driving device is located on the moving end of the forward / backward driving device, and can drive the up / down driving device to move in the forward / backward direction. The left / right driving device is located on the moving end of the up / down driving device, and can drive the left / right driving device to move in the up / down direction. The visual inspection camera is located on the moving end of the left / right driving device, and can drive the visual inspection camera to move in the left / right direction. The forward / backward driving device and the left / right driving device can drive the visual inspection camera to move forward / backward and left / right, facilitating the adjustment of the visual inspection camera's detection position to obtain better detection results.

[0012] Preferably, the axial flow fan blade detection device further includes a reference device, which is located beside the positioning and rotating device. The reference device includes a reference member, which can be positioned above and below the fan blade positioning mechanism in the height direction. The reference member can form an upper reference on the upper side of the axial flow fan blade and a lower reference on the lower side of the axial flow fan blade. When the visual inspection camera is above the fan blade positioning mechanism, it can detect the upper side of the axial flow fan blade and the reference member located on the upper side of the axial flow fan blade. When the visual inspection camera is below the fan blade positioning mechanism, it can detect the lower side of the axial flow fan blade and the reference member located on the lower side of the axial flow fan blade.

[0013] When the visual inspection camera and the reference component are located on the upper side of the blade, the visual inspection camera can obtain the distance between the highest point of the blade and the lower side of the reference component, and determine the height of the highest point of the blade based on the height position of the reference component. When the visual inspection camera and the reference component are located on the lower side of the blade, the visual inspection camera can obtain the distance between the lowest point of the blade and the upper side of the reference component, and determine the height of the lowest point of the blade based on the height position of the reference component. By using the reference component and the blade for reference, the inspection accuracy can be improved.

[0014] Preferably, the reference device further includes a reference up-and-down driving device, the reference member is disposed on the moving end of the reference up-and-down driving device, and the reference up-and-down driving device can drive the reference member to move up and down.

[0015] The up-and-down drive device can move the reference piece up and down, and can adjust the reference piece to a suitable detection position to improve detection accuracy. When there is only one reference piece, the up-and-down drive device can move the reference piece to the upper and lower sides of the blade for separate detection. It can also be adapted to axial flow fan blades of different heights for detection, thus increasing the applicability of the detection equipment.

[0016] Preferably, there are two reference members, which are respectively positioned on the upper and lower sides of the wind turbine positioning mechanism in the height direction. The two reference members can be positioned on the upper and lower sides of the blade, eliminating the need for one reference member to move up and down to switch between the upper and lower sides of the blade, thus improving detection efficiency.

[0017] Preferably, the reference device further includes a left-right reference driving device. The reference device and the positioning rotation device are arranged left-right. The up-down reference driving device is located on the moving end of the left-right reference driving device, and the left-right reference driving device can drive the up-down reference driving device to move in the left-right direction. The left-right reference driving device can move the reference piece left-right to a better position to obtain better detection results.

[0018] Preferably, the detection device further includes a backlight panel, with the visual inspection device and the backlight panel respectively disposed on the left and right sides of the positioning and rotating device, and the reference component disposed between the visual inspection camera and the backlight panel. The backlight panel can serve as a background for photographing the leaf and the reference component, improving the contrast of the photographed image and enhancing the detection effect.

[0019] Preferably, the fan blade positioning mechanism includes a rotating shaft and a positioning shaft, the axes of which are the rotation axis. The rotating shaft is connected to the rotation drive mechanism, and the positioning shaft is located on the upper side of the rotating shaft. The upper side of the positioning shaft has a positioning part for installing and positioning the axial flow fan blade. The positioning shaft is detachably connected to the rotating shaft. For axial flow fan blades of different specifications, the size and shape of their inner holes may differ. Therefore, the positioning shaft can be removed from the rotating shaft, allowing for replacement with positioning shafts of different sizes and shapes to accommodate different specifications of axial flow fan blades and increase the applicability of the testing equipment.

[0020] Preferably, the rotating shaft has a connecting thread, and a connecting nut is threaded onto the connecting thread. A pressure plate is located on the upper side of the connecting nut, and a through hole is located in the middle of the pressure plate. A mounting plate is located on the lower side of the positioning shaft, and the positioning shaft passes through the through hole. The pressure plate presses the mounting plate against the upper side of the rotating shaft. A positioning block is located on the lower side of the mounting plate, and a positioning hole is located on the upper side of the rotating shaft. The positioning block is inserted into the positioning hole. The connecting nut can press the positioning shaft onto the rotating shaft for fixation, facilitating the assembly and disassembly of the positioning shaft. Attached Figure Description

[0021] 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 the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of this utility model after the axial flow fan blades are installed;

[0024] Figure 3 This is a schematic diagram of the positioning and rotating device of this utility model;

[0025] Figure 4 This is an exploded structural diagram of the positioning and rotating device of this utility model;

[0026] Figure 5This is a schematic diagram of the structure of the reference device of this utility model;

[0027] Figure 6 This is a side view of the reference component of this utility model when it is located above the axial flow fan blade.

[0028] Figure 7 This is a side view of the reference component of this utility model when it is located on the underside of the axial flow fan blade.

[0029] Figure 8 This is a schematic diagram of the structure of the visual inspection device of this utility model.

[0030] In the attached diagram: 1-Frame, 2-Positioning and rotating device, 21-Fan blade positioning mechanism, 211-Rotating shaft, 2111-Connecting thread, 2112-Positioning hole, 212-Positioning shaft, 2121-Positioning part, 2122-Mounting plate, 2123-Positioning block, 213-Connecting nut, 2131-Pressure plate, 22-Rotation drive mechanism, 221-Rotation drive motor, 3-Reference device, 31-Reference component, 32-Reference up-down drive device, 33-Reference left-right drive device, 4-Vision inspection device, 41-Vision inspection camera, 42-Vision up-down drive device, 43-Vision front-back drive device, 44-Vision left-right drive device, 5-Backlight panel, 6-Axial flow fan blade, 61-Blade.

[0031] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] 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 skilled in the art without creative effort are within the protection scope of the present utility model.

[0033] It should be noted that if the embodiments of this utility model 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.

[0034] Furthermore, if the embodiments of this utility model 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 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 utility model.

[0035] like Figures 1 to 8 As shown, an axial flow fan blade testing device includes a frame 1, on which a positioning and rotating device 2 and a vision inspection device 4 are provided.

[0036] The positioning and rotating device 2 includes a blade positioning mechanism 21 and a rotation drive mechanism 22. The blade positioning mechanism 21 is used to install and position the axial flow fan blade 6, which has multiple blades 61. The rotation drive mechanism 22 is connected to the blade positioning mechanism 21. The blade positioning mechanism 21 has a vertically arranged rotation axis. The rotation drive mechanism 22 can drive the blade positioning mechanism 21 to rotate along the rotation axis to drive the axial flow fan blade 6 to rotate.

[0037] The visual inspection device 4 is located beside the positioning and rotating device 2. The visual inspection device 4 includes a visual inspection camera 41. The visual inspection camera 41 can be directly facing the upper and lower sides of the fan blade positioning mechanism 21 in the height direction. When the visual inspection camera 41 is above the fan blade positioning mechanism 21, it can inspect the upper side of the axial flow fan blade 6. When the visual inspection camera 41 is below the fan blade positioning mechanism 21, it can inspect the lower side of the axial flow fan blade 6.

[0038] The axial flow fan blade 6 to be tested is installed and fixed on the fan blade positioning mechanism 21. Then, the axial flow fan blade 211 is rotated to rotate the blade 61 to the test position. The test position can be the rotation angle of the lowest and highest points of the axial flow fan blades that have been pre-set according to the standard. When the visual inspection camera 41 is located above the blade 61, the visual inspection camera 41 can obtain the height of the highest point of the blade 61. When the visual inspection camera 41 and the reference piece 31 are located below the blade 61, the visual inspection camera 41 can obtain the height of the lowest point of the blade 61. Continue to rotate the axial flow fan blade 211 to rotate the next blade 61 to the test position and test it. Based on the height of the highest point and the height of the lowest point of the blades 61, it can be determined whether the height and axial runout of the axial flow fan blade 6 are within the standard range.

[0039] This invention uses a positioning and rotating device 2 to install and drive the axial flow fan blade 6 to rotate, and a visual inspection device 4 to detect the height. It can automatically detect the height and axial runout of the axial flow fan blade 6, replacing manual operation and making the inspection results more accurate and stable.

[0040] In some specific embodiments, such as Figure 8 The visual inspection device 4 also includes a visual up-down driving device 42, and the visual inspection camera 41 is mounted on the moving end of the visual up-down driving device 42. The visual up-down driving device 42 can drive the visual inspection camera 41 to move up and down.

[0041] The visual up-down drive device 42 can drive the visual inspection camera 41 to move up and down, and can adjust the visual inspection camera 41 to a suitable inspection position to improve the inspection accuracy. When there is only one visual inspection camera 41, the visual up-down drive device 42 can drive the visual inspection camera 41 to move to the upper and lower sides of the blade 61 for inspection respectively. It can also adapt to the inspection of axial flow fan blades 6 at different heights, increasing the applicability of the inspection equipment.

[0042] In some specific embodiments, there are two visual inspection cameras 41, which are respectively positioned above and below the blade positioning mechanism 21. The two visual inspection cameras 41 can inspect the upper and lower sides of the blade 61 respectively, eliminating the need for one camera to move up and down to switch between the upper and lower sides of the blade 61, thus improving inspection efficiency.

[0043] In some specific embodiments, the visual inspection device 4 further includes a visual forward and backward driving device 43 and a visual left and right driving device 44. The visual inspection device 4 and the positioning and rotating device 2 are arranged side by side. The visual up and down driving device 42 is located on the moving end of the visual forward and backward driving device 43. The visual forward and backward driving device 43 can drive the visual up and down driving device 42 to move in the forward and backward direction. The visual left and right driving device 44 is located on the moving end of the visual up and down driving device 42. The visual up and down driving device 42 can drive the visual left and right driving device 44 to move in the up and down direction. The visual inspection camera 41 is located on the moving end of the visual left and right driving device 44. The visual left and right driving device 44 can drive the visual inspection camera 41 to move in the left and right direction.

[0044] The forward / backward vision drive 43 and the left / right vision drive 44 can drive the vision inspection camera 41 to move forward / backward and left / right, facilitating the adjustment of the detection position of the vision inspection camera 41 to obtain better detection results. The up / down vision drive 42, the forward / backward vision drive 43, and the left / right vision drive 44 can adopt a lead screw motion module, a gear and rack motion module, or a synchronous belt and synchronous pulley motion module, or a cylinder can be used as the drive device.

[0045] In some specific embodiments, the axial flow fan blade detection device further includes a reference device 3, which is located beside the positioning and rotating device 2. The reference device 3 includes a reference member 31, which can be positioned above and below the fan blade positioning mechanism 21 in the height direction. The reference member 31 can form an upper reference on the upper side of the axial flow fan blade 6 and a lower reference on the lower side of the axial flow fan blade 6. When the visual inspection camera 41 is above the fan blade positioning mechanism 21, it can detect the upper side of the axial flow fan blade 6 and the reference member 31 located on the upper side of the axial flow fan blade 6. When the visual inspection camera 41 is below the fan blade positioning mechanism 21, it can detect the lower side of the axial flow fan blade 6 and the reference member 31 located on the lower side of the axial flow fan blade 6.

[0046] When the visual inspection camera 41 is located on the upper side of the blade 61, such as Figure 6 The reference component 31 forms an upper reference relative to the blade 61. The visual inspection camera 41 can obtain the distance between the highest point of the blade 61 and the lower side of the reference component 31. Specifically, the distance can be calculated based on the pixel count of the captured image. The actual vertical width and pixel width of the reference component 31 can be used as a proportional reference for the distance and pixel conversion. Furthermore, the height of the highest point of the blade 61 can be determined based on the height position of the reference component 31. When the visual inspection camera 41 and the reference component 31 are located below the blade 61, such as... Figure 7 The reference element 31 forms a lower reference relative to the blade 61. The visual inspection camera 41 can obtain the distance between the lowest point of the blade 61 and the upper side of the reference element 31, and determine the height of the lowest point of the blade 61 based on the height position of the reference element 31. The reference between the reference element and the blade improves detection accuracy. In other embodiments, the detection device may not use a reference element, but instead uses a virtual reference line set in the visual recognition system of the visual inspection camera 41. The height of the reference line can be predetermined, and the actual heights of the highest and lowest points of the blade can be determined based on the distance between the reference line and the highest point of the blade, and the distance between the reference line and the lowest point of the blade.

[0047] In some specific embodiments, such as Figure 5 The reference device 3 also includes a reference up-down driving device 32. The reference member 31 is disposed on the moving end of the reference up-down driving device 32, and the reference up-down driving device 32 can drive the reference member 31 to move up and down.

[0048] The up-and-down drive device 32 can drive the reference piece 31 to move up and down, and can adjust the reference piece 31 to a suitable detection position to improve detection accuracy. When there is only one reference piece 31, the up-and-down drive device 32 can drive the reference piece 31 to move to the upper and lower sides of the blade 61 for detection respectively. It can also adapt to the detection of axial flow blades 6 at different heights, increasing the applicability of the detection equipment.

[0049] In some specific embodiments, there are two reference elements 31, which are respectively located on the upper and lower sides of the wind turbine positioning mechanism 21 in the height direction. The two reference elements 31 can be respectively located on the upper and lower sides of the blade 61, eliminating the need for one reference element 31 to move up and down to switch between the upper and lower sides of the blade 61, thus improving detection efficiency.

[0050] In some specific embodiments, the reference device 3 further includes a left-right reference drive device 33. The reference device 3 and the positioning rotation device 2 are arranged left and right. The up-down reference drive device 32 is located on the moving end of the left-right reference drive device 33, and the left-right reference drive device 33 can drive the up-down reference drive device 32 to move in the left-right direction. The left-right reference drive device 33 can move the reference piece 31 left and right to a better position to obtain better detection results. The up-down reference drive device 32 and the left-right reference drive device 33 can be a lead screw motion module, a gear and rack motion module, or a synchronous belt and synchronous pulley motion module, or a cylinder can be used as the drive device.

[0051] In some specific embodiments, such as Figure 1 , Figure 6 and Figure 7 The testing equipment also includes a backlight plate 5. The visual inspection device 4 and the backlight plate 5 are respectively located on the left and right sides of the positioning and rotating device 2. The reference piece 31 is located between the visual inspection camera 41 and the backlight plate 5.

[0052] The backlight 5 is positioned directly opposite the blade 61 and the reference piece 31. The backlight 5 emits light and can serve as a background for photographing the blade 61 and the reference piece 31, thereby improving the contrast of the photographed image and enhancing the detection effect.

[0053] In some specific embodiments, such as Figure 3 and Figure 4 The fan blade positioning mechanism 21 includes a rotating shaft 211 and a positioning shaft 212. The axes of the rotating shaft 211 and the positioning shaft 212 are rotation axes. The rotating shaft 211 is connected to the rotating drive mechanism 22. The positioning shaft 212 is located on the upper side of the rotating shaft 211. The upper side of the positioning shaft 212 is provided with a positioning part 2121 for installing and positioning the axial flow fan blade. The positioning shaft 212 is detachably connected to the rotating shaft 211.

[0054] For axial flow fan blades 6 of different specifications, the size and shape of their inner holes may be different. The size and shape of the positioning part 2121 are determined according to the size and shape of the inner hole of the axial flow fan blade 6. The inner hole of the axial flow fan blade 6 may be D-shaped or other shapes. The positioning part 2121 can also be positioned by other fixing methods such as clamping or shaft expansion. Therefore, the positioning shaft 212 can be removed from the rotating shaft 211, and positioning shafts 212 of different sizes and shapes can be replaced to adapt to different specifications of axial flow fan blades 6, thereby increasing the applicability of the testing equipment.

[0055] Furthermore, the rotating shaft 211 is provided with a connecting thread 2111, and a connecting nut 213 is threaded onto the connecting thread 2111. A pressure plate 2131 is provided on the upper side of the connecting nut 213, and a through hole is provided in the middle of the pressure plate 2131. A mounting plate 2122 is provided on the lower side of the positioning shaft 212, through which the positioning shaft 212 passes. The pressure plate 2131 presses the mounting plate 2122 against the upper side of the rotating shaft 211. A positioning block 2123 is provided on the lower side of the mounting plate 2122, and a positioning hole 2112 is provided on the upper side of the rotating shaft 211. The positioning block 2123 is inserted into the positioning hole 2112. The connecting nut 213 can press the positioning shaft 212 onto the rotating shaft 211 for fixation, facilitating the assembly and disassembly of the positioning shaft 212.

[0056] In some specific embodiments, the rotary drive mechanism 22 includes a rotary drive motor 221, which is fixed on the frame 1. The rotary drive motor 221 and the rotating shaft 211 can be connected by a transmission structure such as a synchronous pulley, synchronous belt, or gear to drive the rotating shaft 211 to rotate.

[0057] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A testing device for axial flow fan blades, characterized in that, include: The positioning and rotating device (2) includes a blade positioning mechanism (21) and a rotation drive mechanism (22). The blade positioning mechanism (21) is used to install and position the axial flow blade. The rotation drive mechanism (22) is connected to the blade positioning mechanism (21) in a transmission manner. The blade positioning mechanism (21) has a vertically arranged rotation axis. The rotation drive mechanism (22) can drive the blade positioning mechanism (21) to rotate along the rotation axis to drive the axial flow blade (6) to rotate. A visual inspection device (4) is located beside the positioning and rotating device (2). The visual inspection device (4) includes a visual inspection camera (41). The visual inspection camera (41) is able to face the upper and lower sides of the fan blade positioning mechanism (21) in the height direction. When the visual inspection camera (41) is above the fan blade positioning mechanism (21), it can inspect the upper side of the axial fan blade (6). When the visual inspection camera (41) is below the fan blade positioning mechanism (21), it can inspect the lower side of the axial fan blade (6).

2. The testing equipment for axial flow fan blades as described in claim 1, characterized in that, The visual inspection device (4) further includes a visual up-down driving device (42), and the visual inspection camera (41) is located on the moving end of the visual up-down driving device (42). The visual up-down driving device (42) can drive the visual inspection camera (41) to move up and down.

3. The testing equipment for axial flow fan blades as described in claim 1 or 2, characterized in that, The number of visual inspection cameras (41) is two, and the two visual inspection cameras (41) are respectively positioned above and below the wind blade positioning mechanism (21).

4. The testing equipment for axial flow fan blades as described in claim 2, characterized in that, The visual inspection device (4) further includes a visual forward and backward driving device (43) and a visual left and right driving device (44). The visual inspection device (4) and the positioning and rotating device (2) are arranged side by side. The visual up and down driving device (42) is located on the moving end of the visual forward and backward driving device (43). The visual forward and backward driving device (43) can drive the visual up and down driving device (42) to move in the forward and backward direction. The visual left and right driving device (44) is located on the moving end of the visual up and down driving device (42). The visual up and down driving device (42) can drive the visual left and right driving device (44) to move in the up and down direction. The visual inspection camera (41) is located on the moving end of the visual left and right driving device (44). The visual left and right driving device (44) can drive the visual inspection camera (41) to move in the left and right direction.

5. The testing equipment for axial flow fan blades as described in claim 1, characterized in that, The detection equipment also includes a reference device (3), which is located beside the positioning and rotating device (2). The reference device (3) includes a reference member (31), which can be positioned on the upper and lower sides of the blade positioning mechanism (21) in the height direction. The reference member (31) can form an upper reference on the upper side of the axial flow blade (6) and a lower reference on the lower side of the axial flow blade (6). When the visual inspection camera (41) is on the upper side of the blade positioning mechanism (21), it can detect the upper side of the axial flow blade (6) and the reference member (31) located on the upper side of the axial flow blade (6). When the visual inspection camera (41) is on the lower side of the blade positioning mechanism (21), it can detect the lower side of the axial flow blade (6) and the reference member (31) located on the lower side of the axial flow blade (6).

6. The testing equipment for axial flow fan blades as described in claim 5, characterized in that, The reference device (3) further includes a reference up-down driving device (32), and the reference member (31) is disposed on the moving end of the reference up-down driving device (32). The reference up-down driving device (32) can drive the reference member (31) to move up and down.

7. The testing equipment for axial flow fan blades as described in claim 6, characterized in that, The reference device (3) further includes a reference left and right drive device (33). The reference device (3) and the positioning rotation device (2) are arranged left and right. The reference up and down drive device (32) is located on the moving end of the reference left and right drive device (33). The reference left and right drive device (33) can drive the reference up and down drive device (32) to move in the left and right direction.

8. The testing equipment for axial flow fan blades as described in claim 5, characterized in that, The detection equipment also includes a backlight plate (5), the visual detection device (4) and the backlight plate (5) are respectively located on the left and right sides of the positioning and rotating device (2), and the reference piece (31) is located between the visual detection camera (41) and the backlight plate (5).

9. The testing equipment for axial flow fan blades as described in claim 1, characterized in that, The fan blade positioning mechanism (21) includes a rotating shaft (211) and a positioning shaft (212). The axis of the rotating shaft (211) and the positioning shaft (212) is the rotation axis. The rotating shaft (211) is connected to the rotating drive mechanism (22). The positioning shaft (212) is located on the upper side of the rotating shaft (211). The upper side of the positioning shaft (212) is provided with a positioning part (2121) for installing and positioning the axial flow fan blade. The positioning shaft (212) is detachably connected to the rotating shaft (211).

10. The testing equipment for axial flow fan blades as described in claim 9, characterized in that, The rotating shaft (211) is provided with a connecting thread (2111), and a connecting nut (213) is threaded onto the connecting thread (2111). A pressure plate (2131) is provided on the upper side of the connecting nut (213), and a through hole is provided in the middle of the pressure plate (2131). A mounting plate (2122) is provided on the lower side of the positioning shaft (212), and the positioning shaft (212) passes through the through hole. The pressure plate (2131) presses the mounting plate (2122) against the upper side of the rotating shaft (211). A positioning block (2123) is provided on the lower side of the mounting plate (2122), and a positioning hole (2112) is provided on the upper side of the rotating shaft (211). The positioning block (2123) is inserted into the positioning hole (2112).

Images