Fan blade root clamping mechanism

Abstract

The invention relates to the technical field of clamping mechanisms, and discloses a fan blade root clamping mechanism which comprises an upper clamp and a lower clamp, pressing plates are mounted at the joint of the upper clamp and the lower clamp, and a pressing bolt is screwed between the pressing plates to form a stable mounting base; the hanging bolt and the connecting bolt are arranged on the surfaces of the upper hoop and the lower hoop, the surface of the hanging bolt is screwed with the locking nut, the output end of the hanging bolt is provided with the clasping piece through the rotating shaft, the inner wall of the clasping piece is provided with the spring washer, the clasping force on the blade can be enhanced, the blade deviation after angle adjustment is reduced, and the output end of the connecting bolt is provided with the adjusting hoop through the rotating shaft; the limiting blocks are arranged on the surfaces of the upper clamping hoop and the lower clamping hoop, the hanging bolts and the connecting bolts penetrate through the limiting blocks, the mounting plates are mounted on the surfaces of the limiting blocks, the mounting plates penetrate through the limiting blocks and are provided with the limiting hoops, the limiting blocks can limit the displacement amplitude of the limiting blocks, other adjusted parts are prevented from being driven to change, independent blade angle adjustment is achieved, and the angle adjusting efficiency is improved. The blade angle stability and consistency are guaranteed, and repeated angle adjustment is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of clamping mechanisms, in particular to a fan blade root clamping mechanism. BACKGROUND

[0002] As an important direction of global clean energy development, wind power generation, the fan blade is the core component of the realization of wind energy to mechanical energy conversion, and the blade root clamping mechanism bears the key role of stable connection between the blade and the fan shaft. The mechanism not only needs to withstand the gravity, aerodynamic load and other complex forces of the blade during long-term operation of the fan, to ensure that the blade does not loosen or displace, but also needs to cooperate with the blade angle adjustment function to adapt to the wind energy utilization demand under different wind speed and wind direction conditions, so the rationality of its structure design is directly related to the operation safety and power generation efficiency of the fan.

[0003] In the prior art, most fan blade root clamping mechanisms adopt an integrated connection mode, and the adjusting parts and multiple blades have a linkage relationship. When the angle of a single blade is adjusted, the displacement of the bolts and other parts during the adjustment will simultaneously drive the related structures of other blades that have been adjusted to deviate, resulting in the invalidation of the previously adjusted blade working angle. At the same time, the existing mechanism lacks a special limiting structure to constrain the displacement range of the adjusting parts, the bolts are prone to excessive displacement due to improper adjustment force control, and the fastening of the contact part between the clamping part and the blade is insufficient, so that a gap is easily generated between the blade and the clamping part after the angle adjustment, which further causes the blade angle deviation. This not only increases the workload of repeated angle adjustment and greatly reduces the angle adjustment efficiency, but also is difficult to ensure the consistency of the angles of all blades of the entire fan, which ultimately affects the stable capture of wind energy by the fan, and may even cause the fan to run with increased vibration due to excessive blade angle deviation, thereby shortening the service life of the equipment. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a fan blade root clamping mechanism to solve the problems of invalidation of the previously adjusted blade working angle and increased vibration of the fan due to excessive blade angle deviation.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solution: a fan blade root clamping mechanism, comprising:

[0006] An upper clamp is provided below a lower clamp, and a pressing plate is installed at the connection between the upper clamp and the lower clamp. A pressing bolt is rotatably connected between the pressing plates.

[0007] A hanging bolt is provided on the surface of the upper clamp and the lower clamp. A locking nut is rotatably connected to the surface of the hanging bolt. A clamping part is rotatably connected to the output end of the hanging bolt through a rotating shaft. A spring washer is installed on the inner wall of the clamping part.

[0008] Connecting bolts are provided on the surfaces of the upper and lower clamps, and the output ends of the connecting bolts are all equipped with adjusting clamps via rotating shafts;

[0009] Limiting blocks are provided on the surfaces of the upper and lower clamps. The hanging bolts and connecting bolts all penetrate the interior of the limiting blocks. Mounting plates are installed on the surfaces of the limiting blocks, and limiting clamps are installed on the mounting plates through the limiting blocks.

[0010] Preferably, each of the adjusting clamps is equipped with a limiting rod, which penetrates the surfaces of the upper and lower clamps. The limiting rod can provide bidirectional limiting for the limiting clamp, preventing it from shifting laterally or loosening longitudinally under the vibration generated by the fan operation, and ensuring that the limiting clamp always maintains a stable fit with the hanging bolts and connecting bolts. At the same time, the design of the limiting rod penetrating the clamp makes the limiting clamp, the upper clamp, and the lower clamp form an integrated linkage structure, reducing the relative displacement between the limiting clamp and the clamp body, and further ensuring the clamping stability of the clamping mechanism on the blade root.

[0011] Preferably, the clamping component has an arc-shaped design, and guide rods are installed at all four corners of the clamping component's surface. The guide rods penetrate the surfaces of the upper and lower clamps. The arc-shaped design allows the clamping component to better fit the arc-shaped outer contour of the wind turbine blade root, increasing the contact area between the clamping component and the blade root, avoiding localized force concentration at the blade root, and improving the uniformity of the clamping force. The guide rods at the four corners provide precise guidance for the movement of the clamping component, preventing it from tilting or shifting when adjusted with the hanging bolts, ensuring that the clamping component always accurately fits the blade root, while reducing frictional wear between the clamping component and the clamps, and extending the service life of the clamping component.

[0012] Preferably, guide cylinders are installed on the surfaces of the upper and lower clamps at positions corresponding to the guide rods. The guide rods pass through the interior of the guide cylinders. The guide cylinders protect the guide rods, preventing them from rubbing directly against the clamp surfaces and causing wear. They also correct the movement trajectory of the guide rods, ensuring they move smoothly in a straight line and preventing jamming due to machining errors on the clamp surfaces. Furthermore, the guide cylinders provide support for the guide rods, preventing them from bending and deforming under long-term stress, thus ensuring the long-term reliability of the guiding function.

[0013] Preferably, a mating plate is installed at the surface connection of the upper clamp and the lower clamp, and an anti-slip pad is installed on the surface of the mating plate. The mating plate can increase the contact area at the clamp connection, so that the clamping force of the clamping bolt is evenly transmitted to the connection, avoiding damage to the connection due to excessive local stress. The anti-slip pad can significantly increase the friction between the mating plates, prevent the clamp from sliding relative to each other under the vibration of the fan, further improve the firmness of the connection, and ensure that the overall stability of the clamping mechanism is not affected by vibration.

[0014] Preferably, the surface of the butt plate of the upper clamp is provided with a clamping plate, and the surface of the butt plate of the lower clamp is provided with a clamping groove, the cooperation of the clamping plate and the clamping groove can realize the pre-positioning of the clamp, facilitate the quick alignment of the butt joint position, improve the installation efficiency; at the same time, the clamping structure can limit the lateral displacement of the clamp, prevent misalignment after butt joint, and also assist in bearing the lateral force, reduce the stress burden of the compression bolt, and enhance the structural strength of the connection.

[0015] Preferably, the surface of the limiting hoop is provided with anti-skid lines, and the limiting hoop is in close contact with the surface of the hanging bolt and the connecting bolt, the anti-skid lines can increase the friction between the limiting hoop and the surface of the bolt, effectively prevent the bolt from rotating or axially loosening due to vibration, ensure that the bolt is always in the preset working position, and guarantee the clamping and adjusting effects of the holding member and the adjusting hoop; the close contact design can make the limiting force of the limiting hoop uniformly act on the surface of the bolt, avoid damage caused by excessive local stress of the bolt, and also ensure that the limiting has no dead angle and improves the limiting reliability.

[0016] Preferably, the surface of the limiting hoop is provided with a limiting plate, and the limiting plate is in close contact with the inner wall of the limiting block, the limiting plate can limit the displacement of the limiting hoop in the limiting block, prevent the limiting hoop from being laterally or longitudinally deviated, and ensure that the limiting hoop is always in close contact with the bolt; the close contact with the inner wall of the limiting block can form a stable assembly relationship between the limiting hoop and the limiting block, avoid loosening or shaking of the limiting hoop due to vibration, and enhance the overall stability of the limiting structure.

[0017] Preferably, a reset spring is arranged between the mounting plate and the limiting block, one end of the reset spring is connected with the surface of the limiting block, and the other end of the reset spring is connected with the surface of the mounting plate, the reset spring can provide a continuous elastic force for the mounting plate, so that the mounting plate drives the limiting hoop to always closely contact with the bolt, even if the bolt is slightly displaced due to vibration or temperature change, the spring can automatically compensate through deformation, and the limiting is ensured not to fail; at the same time, the reset spring can absorb part of the vibration energy, reduce the impact of vibration on the connecting structure of the mounting plate and the limiting block, and prolong the service life of the components.

[0018] Preferably, the surface of the mounting plate is provided with an insertion rod at each corner, and the insertion rod penetrates the surface of the limiting block, the insertion rods at the four corners can provide accurate guidance for the movement of the mounting plate, prevent the mounting plate from being inclined or twisted due to the action force of the spring or vibration, and ensure that the mounting plate moves stably along the preset direction; the design of penetrating the limiting block can also enhance the connection stability of the mounting plate and the limiting block, avoid separation or loosening of the mounting plate and the limiting block, and improve the structural reliability of the limiting mechanism.

[0019] Compared with the prior art, the present application provides a fan blade root clamping mechanism, which has the following beneficial effects:

[0020] The upper clamping hoop and the lower clamping hoop are connected through the pressing plate and the pressing bolt to form a stable mounting base, the hanging bolt and the connecting bolt are respectively assembled with the clamping member and the adjusting hoop through the rotating shaft, and both of them penetrate the limiting block, the limiting block is fixed in position through the mounting plate and the limiting hoop, so that a single blade can be adjusted in angle by adjusting the corresponding hanging bolt or connecting bolt, the limiting block can effectively limit the displacement amplitude of the hanging bolt and the connecting bolt during adjustment, avoiding the position change of other related components of the blade driven by the hanging bolt and the connecting bolt, and the spring washer in the inner wall of the clamping member can enhance the clamping force on the blade, reduce the deviation of the blade angle after angle adjustment, and further realize independent adjustment of the blade angle, without causing the change of the working angle of the blade that has been adjusted in front, effectively improving the angle adjustment efficiency of the whole fan blade, ensuring the stability and consistency of the blade angle, and avoiding the repeated angle adjustment phenomenon caused by mutual interference between components during angle adjustment. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present application;

[0022] Figure 2 It is a structural schematic diagram of the clamping member of the present application;

[0023] Figure 3 It is a structural schematic diagram of the adjusting hoop of the present application;

[0024] Figure 4 It is a structural schematic diagram of the limiting block of the present application.

[0025] In the figure: 1, upper clamping hoop; 101, lower clamping hoop; 102, pressing plate; 103, pressing bolt; 2, hanging bolt; 201, locking nut; 3, clamping member; 31, spring washer; 4, connecting bolt; 5, adjusting hoop; 6, limiting block; 7, mounting plate; 8, limiting hoop; 9, limiting rod; 10, guide rod; 11, guide cylinder; 12, butt joint plate; 121, anti-skid pad; 13, clamping plate; 14, clamping groove; 15, limiting plate; 16, return spring; 17, plug-in rod. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0027] The present application provides a technical solution, a fan blade root clamping mechanism, please refer to Figure 1, including the upper clamp 1, the lower clamp 101 is arranged below the upper clamp 1, the connecting part of the upper clamp 1 and the lower clamp 101 is equipped with the pressing plate 102, the pressing plate 102 is screwed with the pressing bolt 103;

[0028] Please refer to Figure 2 , the hanging bolt 2 is arranged on the surface of the upper clamp 1 and the lower clamp 101, the surface of the hanging bolt 2 is screwed with the locking nut 201, the output end of the hanging bolt 2 is equipped with the holding piece 3 through the rotating shaft, the inner wall of the holding piece 3 is equipped with the spring washer 31;

[0029] Please refer to Figure 1 , the connecting bolt 4 is arranged on the surface of the upper clamp 1 and the lower clamp 101, the output end of the connecting bolt 4 is equipped with the adjusting hoop 5 through the rotating shaft;

[0030] The limiting block 6 is arranged on the surface of the upper clamp 1 and the lower clamp 101, the hanging bolt 2 and the connecting bolt 4 are arranged in the limiting block 6, please refer to Figure 4 The surface of the limiting block 6 is equipped with the mounting plate 7, the mounting plate 7 is equipped with the limiting hoop 8.

[0031] The rotating locking nut 201 can contact with the surface of the limiting block 6, so that the hanging bolt 2 can be limited;

[0032] The upper clamp 1 and the lower clamp 101 constitute a stable mounting base through the pressing plate 102 and the pressing bolt 103, which provides stable support for subsequent angle adjustment operation; the hanging bolt 2 and the connecting bolt 4 are respectively assembled with the holding piece 3 and the adjusting hoop 5 through the rotating shaft, and both of them pass through the limiting block 6, and the limiting block 6 is fixed in position through the mounting plate 7 and the limiting hoop 8, this structure layout makes that a single blade can be adjusted in angle by adjusting the corresponding hanging bolt 2 or connecting bolt 4, the limiting block 6 can effectively limit the displacement amplitude of the hanging bolt 2 and the connecting bolt 4 during adjustment, avoiding that other related parts of the blade which have been adjusted are moved, at the same time, the spring washer 31 in the inner wall of the holding piece 3 can enhance the holding force of the blade, reduce the deviation of the blade angle after angle adjustment, and then realize the independent adjustment of the blade angle, without changing the working angle of the blade which has been adjusted, effectively improving the angle adjustment efficiency of the whole fan blade, ensuring the stability and consistency of the blade angle, and avoiding the phenomenon of repeated angle adjustment caused by mutual interference between parts during angle adjustment.

[0033] Please refer to Figure 3The surfaces of the adjusting hoops 5 are respectively provided with limiting rods 9 penetrating the surfaces of the upper and lower clamping hoops 1 and 101, the limiting rods 9 can limit the adjusting hoops 5 in two directions, avoiding the lateral deviation or longitudinal loosening of the adjusting hoops 5 under the vibration of the fan, ensuring that the adjusting hoops 5 are always stably combined with the hanging bolts 2 and the connecting bolts 4; meanwhile, the design of the limiting rods 9 penetrating the clamping hoops makes the adjusting hoops 5 and the upper and lower clamping hoops 1 and 101 form an integrated linkage structure, reducing the relative displacement between the adjusting hoops 5 and the clamping hoops, and further ensuring the clamping stability of the clamping mechanism to the blade root.

[0034] Please refer to Figure 2 The holding member 3 is designed in an arc shape, and the surfaces of the holding member 3 are respectively provided with guide rods 10 penetrating the surfaces of the upper and lower clamping hoops 1 and 101, the arc shape can make the holding member 3 better adapt to the arc-shaped outer contour of the blade root of the fan, increase the contact area between the holding member 3 and the blade root, avoid the local stress concentration of the blade root, and improve the uniformity of the holding force; the guide rods 10 at the four corners can provide accurate guidance for the movement of the holding member 3, prevent the holding member 3 from tilting or deviating when adjusting the hanging bolts 2, ensure that the holding member 3 is always accurately combined with the blade root, and at the same time reduce the friction loss between the holding member 3 and the clamping hoops, prolong the service life of the holding member 3.

[0035] Please refer to Figure 1 The surfaces of the upper and lower clamping hoops 1 and 101 are respectively provided with guide cylinders 11 corresponding to the positions of the guide rods 10, the guide rods 10 penetrate the interiors of the guide cylinders 11, the guide cylinders 11 can protect the guide rods 10 from being directly rubbed with the surfaces of the clamping hoops, avoiding abrasion, and at the same time can correct the movement track of the guide rods 10, ensuring that the guide rods 10 move stably along a straight line, preventing the guide rods 10 from being stuck due to the machining error of the surfaces of the clamping hoops; in addition, the guide cylinders 11 can also support the guide rods 10, avoiding the bending deformation of the guide rods 10 under long-term stress, and ensuring the long-term reliability of the guiding function.

[0036] Please refer to Figure 2 The surfaces of the upper and lower clamping hoops 1 and 101 are respectively provided with butt plates 12, and the surfaces of the butt plates 12 are respectively provided with anti-skid pads 121, the butt plates 12 can increase the contact area of the connecting part of the clamping hoops, making the pressing force of the pressing bolts 103 uniformly transmitted to the connecting part, avoiding the damage of the connecting part due to the excessive local stress; the anti-skid pads 121 can significantly increase the friction force between the butt plates 12, preventing the relative sliding of the clamping hoops under the vibration of the fan, further improving the firmness of the connecting part, and ensuring that the overall stability of the clamping mechanism is not affected by the vibration.

[0037] The surface of the butt plate 12 of the upper clamp 1 is provided with a clamping plate 13, and the surface of the butt plate 12 of the lower clamp 101 is provided with a clamping groove 14. The cooperation of the clamping plate 13 and the clamping groove 14 can realize the pre-positioning of the clamp, facilitate the quick alignment of the butt joint position, improve the installation efficiency, limit the transverse displacement of the clamp, prevent misalignment after butt joint, and assist in bearing the transverse force, thereby reducing the stress burden of the compression bolt 103, enhancing the structural strength of the connection, and the like.

[0038] Please refer to Figure 4 The surface of the limiting hoop 8 is provided with anti-skid lines, and the limiting hoop 8 is in close contact with the surface of the hanging bolt 2 and the connecting bolt 4. The anti-skid lines can increase the friction between the limiting hoop 8 and the surface of the bolt, effectively prevent the bolt from rotating or axially loosening due to vibration, ensure that the bolt is always in the preset working position, and guarantee the clamping and adjusting effects of the holding member 3 and the adjusting hoop 5. The close contact design can make the limiting force of the limiting hoop 8 uniformly act on the surface of the bolt, avoid damage caused by excessive local stress of the bolt, and ensure that there is no dead angle in limiting, thereby improving the limiting reliability.

[0039] The surface of the adjusting hoop 5 is provided with a limiting plate 15, and the limiting plate 15 is in close contact with the inner wall of the limiting block 6. The limiting plate 15 can limit the displacement of the limiting hoop 8 in the limiting block 6, prevent the limiting hoop 8 from deviating horizontally or vertically, and ensure that the limiting hoop 8 is always in close contact with the bolt. The close contact with the inner wall of the limiting block 6 can form a stable assembly relationship between the limiting hoop 8 and the limiting block 6, avoid loosening or shaking of the limiting hoop 8 due to vibration, and enhance the overall stability of the limiting structure.

[0040] A reset spring 16 is arranged between the mounting plate 7 and the limiting block 6. One end of the reset spring 16 is connected to the surface of the limiting block 6, and the other end of the reset spring 16 is connected to the surface of the mounting plate 7. The reset spring 16 can provide a continuous elastic force for the mounting plate 7, so that the mounting plate 7 always drives the limiting hoop 8 to be in close contact with the bolt. Even if the bolt slightly displaces due to vibration or temperature change, the spring can automatically compensate through deformation, ensuring that the limiting does not fail. At the same time, the reset spring 16 can absorb part of the vibration energy, reduce the impact of vibration on the connecting structure of the mounting plate 7 and the limiting block 6, and prolong the service life of the components.

[0041] The surface of the mounting plate 7 is provided with a plug-in rod 17 at four corners, and the plug-in rod 17 penetrates the surface of the limiting block 6. The plug-in rod 17 at the four corners can provide accurate guidance for the movement of the mounting plate 7, prevent the mounting plate 7 from tilting or twisting due to the action of the spring force or vibration, and ensure that the mounting plate 7 moves smoothly along the preset direction. The design of penetrating the limiting block 6 can also enhance the connection stability of the mounting plate 7 and the limiting block 6, avoid separation or loosening of the mounting plate 7 and the limiting block 6, and improve the structural reliability of the limiting mechanism.

[0042] The installation process of the scheme is as follows:

[0043] Step one: first, the upper clamp 1 and the lower clamp 101 corresponding butt joint, the upper clamp 1 butt joint plate 12 surface carding plate 13 inserted into the lower clamp 101 butt joint plate 12 surface carding groove 14, complete the positioning to avoid misplacement; then install the butt joint plate 12 at the joint of the clamp, ensure that the anti-skid pad 121 on the surface of the butt joint plate 12 is closely attached; finally, assemble the pressing plate 102 at the joint of the clamp, and tighten the pressing bolt 103 between the pressing plate 102 and fasten it, so that the upper clamp 1 and the lower clamp 101 form a stable installation base, and the clamping structure helps to bear the transverse force, reducing the stress burden of the pressing bolt 103.

[0044] Step two: install the hanging bolt 2 and the connecting bolt 4 on the specified surface of the upper clamp 1 and the lower clamp 101 respectively, assemble the clamping piece 3 to the output end of the hanging bolt 2 through the rotating shaft, ensure that the spring washer 31 on the inner wall of the clamping piece 3 is tightly attached to the inner wall; at the same time, assemble the adjusting hoop 5 to the output end of the connecting bolt 4 through the rotating shaft; then let the hanging bolt 2 and the connecting bolt 4 penetrate the inside of the limiting block 6, and then install the limiting hoop 8 on the surface of the limiting block 6 through the mounting plate 7, so that the limiting hoop 8 penetrates the limiting block 6 and initially contacts the surface of the bolt, and the limiting block 6 is used to limit the displacement amplitude of the bolt.

[0045] Step three: install the limiting rod 9 on the surface of the limiting hoop 8, ensure that the limiting rod 9 penetrates the surface of the upper clamp 1 and the lower clamp 101, and form a horizontal and vertical double limiting of the limiting hoop 8 through the limiting rod 9, to prevent the limiting hoop 8 from deviating or loosening due to fan vibration; the design of the limiting rod 9 penetrating the clamp makes the limiting hoop 8 and the upper clamp 1, the lower clamp 101 form an integrated linkage structure, reducing the relative displacement of the limiting hoop 8 and the clamp body.

[0046] Step four: after confirming that the arc design of the clamping piece 3 is suitable for the blade root profile, install the guide rod 10 on the surface of the clamping piece 3 at four corners, so that the guide rod 10 penetrates the surface of the upper clamp 1 and the lower clamp 101; then install the guide cylinder 11 on the surface of the upper clamp 1 and the lower clamp 101 corresponding to the position of the guide rod 10, so that the guide rod 10 penetrates the inside of the guide cylinder 11, and the guide cylinder 11 protects the guide rod 10, corrects the motion trajectory, and avoids the bending deformation of the guide rod 10.

[0047] Step five: process anti-skid lines on the surface of the limiting hoop 8, ensure that the limiting hoop 8 is in close contact with the surface of the hanging bolt 2 and the connecting bolt 4, and increase the friction through the anti-skid lines to prevent the bolt from loosening; then install the limiting plate 15 on the surface of the limiting hoop 8, adjust the limiting plate 15 so that it is in close contact with the inner wall of the limiting block 6, limit the displacement of the limiting hoop 8 in the limiting block 6 through the limiting plate 15, and avoid loosening due to vibration.

[0048] Step six: assemble the reset spring 16 between the mounting plate 7 and the limit block 6, connect one end of the reset spring 16 with the surface of the limit block 6, and the other end with the surface of the mounting plate 7; the reset spring 16 provides continuous elastic force for the mounting plate 7, drives the limit hoop 8 on the mounting plate 7 to always adhere to the bolt, automatically compensates through deformation when the bolt is slightly displaced, and at the same time absorbs vibration energy to reduce the impact on the connecting structure.

[0049] Step seven: install the plug-in rod 17 on the surface of the mounting plate 7 at four corners, so that the plug-in rod 17 penetrates the surface of the limit block 6; through the plug-in rod 17 at four corners, accurate guidance is provided for the movement of the mounting plate 7, preventing the mounting plate 7 from tilting and twisting, while enhancing the connection stability of the mounting plate 7 and the limit block 6, avoiding separation or loosening of the two.

[0050] The scheme: first, the upper clamp 1 and the lower clamp 101 are correspondingly inserted through the clamping plate 13 and the clamping groove 14 to realize positioning, avoid misalignment and improve installation efficiency; then assemble the butt joint plate 12, make the surface anti-skid pad 121 closely adhere to increase the friction force of the butt joint to prevent relative sliding caused by vibration, then tighten the clamp through the pressing plate 102 and the pressing bolt 103, form a stable installation base, and ensure the stable support of the subsequent angle adjustment operation; then install the hanging bolt 2 and the connecting bolt 4 at the specified position of the upper clamp 1 and the lower clamp 101, assemble the spring washer 31 of the clamping piece 3 to the output end of the hanging bolt 2 through the rotating shaft, the spring washer 31 can enhance the clamping force of the blade, reduce the angle deviation after adjustment, assemble the adjusting clamp 5 to the output end of the connecting bolt 4, make the bolt penetrate the limiting block 6, and install the limiting clamp 8 through the mounting plate 7, limit the displacement amplitude of the bolt through the limiting block 6, avoid moving other adjusted blade components when adjusting a single blade; then install the limiting rod 9 on the surface of the limiting clamp 8 and make it penetrate the clamp, form bidirectional limiting for the limiting clamp 8, prevent lateral deviation or longitudinal loosening caused by fan vibration, and make the limiting clamp 8 and the clamp form an integrated linkage structure to reduce relative displacement; after confirming that the arc-shaped design of the clamping piece 3 is suitable for the blade root profile, install the guide rod 10 at the four corners and make it penetrate the clamp, provide accurate guidance for the movement of the clamping piece 3 to prevent tilting deviation, install the guide cylinder 11 corresponding to the position of the guide rod 10, protect the guide rod 10 from wear and tear, correct the motion track to prevent jamming, and prevent the guide rod 10 from bending and deforming; then process anti-skid lines on the surface of the limiting clamp 8, make it closely contact with the hanging bolt 2 and the connecting bolt 4, increase the friction force to prevent the bolt from rotating or axially loosening, install the limiting plate 15 to make it closely adhere to the inner wall of the limiting block 6, limit the displacement of the limiting clamp 8 to ensure the reliability of the limiting; then assemble the return spring 16 between the mounting plate 7 and the limiting block 6, connect the limiting block 6 and the mounting plate 7 at both ends, provide continuous elastic force for the mounting plate 7, make the limiting clamp 8 always closely adhere to the bolt, even if the bolt slightly displaces due to vibration or temperature change, the spring can automatically compensate, absorb vibration energy and reduce the impact on the connecting structure; finally, install the plug-in rod 17 at the four corners of the mounting plate 7 and make it penetrate the limiting block 6, provide accurate guidance for the movement of the mounting plate 7 to prevent tilting and twisting, enhance the connection stability of the mounting plate 7 and the limiting block 6, finally realize independent adjustment of the blade angle, avoid the change of the working angle of the adjusted blade, improve the blade angle adjustment efficiency of the whole fan, ensure the stability and consistency of the blade angle, and ensure the long-term clamping stability of the clamping mechanism to the blade root.

[0051] It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting; it is not intended to exclude myriad other embodiments of the present application that other inventors can develop based on the same general inventive concepts embodied by the described embodiments. That is, although the present application is described in terms of particular embodiments and illustrative figures, it should be apparent that the scope of the present application is not limited to these specific embodiments.

[0052] While the embodiments of the application have been shown and described herein, it will be understood by those skilled in the art that many changes, modifications, substitutions and alterations to these embodiments can be made without departing from the principles and spirits of the application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A wind turbine blade root clamping mechanism, characterized in that, Include: The upper clamp (1), the lower clamp (101) is arranged below the upper clamp (1), the connecting part of the upper clamp (1) and the lower clamp (101) is equipped with the pressing plate (102), the pressing bolt (103) is screwed between the pressing plate (102); The hanging bolt (2) is arranged on the surface of the upper clamp (1) and the lower clamp (101), the surface of the hanging bolt (2) is screwed with the locking nut (201), the output end of the hanging bolt (2) is equipped with the embracing part (3) through the rotating shaft, the inner wall of the embracing part (3) is equipped with the spring washer (31); The connecting bolt (4) is arranged on the surface of the upper clamp (1) and the lower clamp (101), the output end of the connecting bolt (4) is equipped with the adjusting clamp (5) through the rotating shaft; The limiting block (6) is arranged on the surface of the upper clamp (1) and the lower clamp (101), the hanging bolt (2) and the connecting bolt (4) all penetrate the inside of the limiting block (6), the surface of the limiting block (6) is equipped with the mounting plate (7), the mounting plate (7) is equipped with the limiting clamp (8) through the limiting block (6).

2. A fan blade root clamping mechanism according to claim 1, characterised in that: The surface of the adjusting clamp (5) is equipped with the limiting rod (9), the limiting rod (9) penetrates the surface of the upper clamp (1) and the lower clamp (101).

3. A fan blade root clamping mechanism according to claim 1, wherein: The embracing part (3) is designed as an arc shape, the surface of the embracing part (3) is equipped with the guide rod (10) at four corners, the guide rod (10) penetrates the surface of the upper clamp (1) and the lower clamp (101).

4. A fan blade root clamping mechanism according to claim 3, wherein: The surface of the upper clamp (1) and the lower clamp (101) is equipped with the guide cylinder (11) at the corresponding position of the guide rod (10), the guide rod (10) penetrates the inside of the guide cylinder (11).

5. A fan blade root clamping mechanism according to claim 1, wherein: The surface connecting part of the upper clamp (1) and the lower clamp (101) is equipped with the butt joint plate (12), the surface of the butt joint plate (12) is equipped with the antiskid pad (121).

6. A wind turbine blade root clamp mechanism according to claim 5, wherein: The surface of the butt joint plate (12) of the upper clamp (1) is equipped with the clamping plate (13), the surface of the butt joint plate (12) of the lower clamp (101) is equipped with the clamping groove (14).

7. A fan blade root clamping mechanism according to claim 1, wherein: The surface of the limiting clamp (8) is equipped with the antiskid line, the limiting clamp (8) is in close contact with the surface of the hanging bolt (2) and the connecting bolt (4).

8. A wind turbine blade root clamping mechanism according to claim 1, wherein: The surface of the limiting clamp (8) is equipped with the limiting plate (15), the limiting plate (15) is in close contact with the inner wall of the limiting block (6).

9. A fan blade root clamping mechanism according to claim 1, wherein: The reset spring (16) is arranged between the mounting plate (7) and the limiting block (6), one end of the reset spring (16) is connected with the surface of the limiting block (6), the other end of the reset spring (16) is connected with the surface of the mounting plate (7).

10. A fan blade root clamping mechanism according to claim 1, wherein: The surface of the mounting plate (7) is equipped with the plug-in rod (17) at four corners, the plug-in rod (17) penetrates the surface of the limiting block (6).

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