Tower sweeping prevention device and fan with same

Abstract

The invention provides a tower sweeping prevention device and a draught fan with the tower sweeping prevention device, and the tower sweeping prevention device comprises a supporting frame and a tower barrel connecting part; the elastic body is wound on the periphery of the supporting frame, and one end of the elastic body is fixedly connected with the supporting frame; the detection piece is arranged on the supporting frame, and the other end of the elastic body is connected with the detection piece. Through the technical scheme provided by the invention, the problem that the anti-sweeping tower mechanism in the related technology cannot meet the use requirement can be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of wind power generation, and in particular to an anti-sweep tower device and a wind turbine having the same. Background Art

[0002] As wind turbines become larger, wind turbine blades become longer and longer, blade flexibility increases, blade deformation increases, and there is even a risk of tower sweep. In addition, in order to reduce blade costs, the safety margin of blades is constantly reduced, which increases the risk of blade tower sweep.

[0003] In order to more effectively ensure the safety and reliability of the blades and reduce the deformation of the blades, the traditional control method is used to reduce the blade load, thereby reducing the deformation of the blade tip, but this will result in a loss of power generation. The current solution is to install a laser radar on the nacelle to control the blade pitch by scanning the distance between the blade and the tower, ultimately preventing the blade from scanning the tower.

[0004] The disadvantages of the above scheme are that, on the one hand, the environmental adaptability of the laser is limited and it is easy to fail in foggy weather and cannot properly control the pitch; on the other hand, this type of method requires opening an opening in the cabin and installing a laser radar, which is relatively expensive. Summary of the invention

[0005] The present invention provides an anti-sweep tower device and a fan having the same, so as to solve the problem that the anti-sweep tower mechanism in the related art cannot meet the use requirements.

[0006] According to one aspect of the present invention, there is provided an anti-sweep tower device, which includes: a support frame having a tower barrel connecting portion; an elastomer wound around the outer circumference of the support frame, one end of the elastomer being fixedly connected to the support frame; a detection member arranged on the support frame, the other end of the elastomer being connected to the detection member.

[0007] Furthermore, a plurality of connection components are arranged on the support frame, and the plurality of connection components are arranged at intervals in the vertical direction. The connection components include a plurality of circular rings arranged at intervals in the circumferential direction of the support frame, and the elastic body is sequentially passed through the plurality of circular rings.

[0008] Furthermore, there are two connecting assemblies, which are respectively arranged at the upper end and the lower end of the support frame, and the elastic body is staggered through the circular ring of the connecting assembly at the upper end and the circular ring of the connecting assembly at the lower end.

[0009] Furthermore, the support frame includes a support platform and a frame body arranged on the support platform, the support platform and the frame body are both sleeved on the outer circumference of the tower, the tower connecting part is arranged on the support platform, and multiple rings, elastomers and detection components are all arranged on the frame body.

[0010] Furthermore, a positioning groove is provided on the supporting platform, and the frame is located in the positioning groove.

[0011] Furthermore, the thickness of the supporting platform is greater than or equal to 0.5 m; and / or the outer diameter of the frame is greater than or equal to 1 m.

[0012] Further, the tower connection portion includes a plurality of angle plates arranged at the lower end of the support frame, and the plurality of angle plates are arranged at intervals along the circumference of the support frame; and / or the elastic body includes an elastic rope.

[0013] Furthermore, there are multiple elastomers and detection components, and the winding radius of each elastomer is different; and / or, the anti-sweeping tower device also includes a controller, and the controller and the detection component are both signal-connected, and the detection component can transmit the detection signal of the elastomer to the controller.

[0014] According to another aspect of the present invention, a wind turbine is provided, comprising: a tower; an impeller rotatably arranged on the tower; an anti-sweep tower device, wherein a support frame of the anti-sweep tower device is connected to the tower, an end of the impeller can contact with an elastic body of the anti-sweep tower device, and the anti-sweep tower device is the anti-sweep tower device provided above.

[0015] Furthermore, the vertical distance between the contact position of the end of the impeller with the elastomer and the lowest point of the support frame is greater than or equal to 0.5m; and / or the vertical distance between the contact position of the end of the impeller with the elastomer and the highest point of the support frame is greater than or equal to 1m.

[0016] Using the technical solution of the present invention, the anti-sweep tower device includes a support frame, an elastomer and a detection member. The support frame is connected to the tower through a tower connection portion. Since the elastomer is wound around the outer circumference of the support frame, after the blades of the wind turbine are deformed, the ends of the blades will contact the elastomer, and then the elastomer will undergo stress deformation. The stress deformation of the elastomer can be detected by the detection member, and the operating state of the unit can be controlled by detecting the stress deformation of the elastomer. In addition, since an elastomer is provided, the ends of the blades can be prevented from directly contacting the tower, thereby reducing damage to the blades and the tower. Compared with the method of laser detection, the cost is reduced and the adaptability is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0018] Figure 1 A schematic structural diagram of a fan provided in an embodiment of the present invention is shown;

[0019] Figure 2 A schematic structural diagram of a frame of an anti-sweep tower device provided according to an embodiment of the present invention is shown;

[0020] Figure 3A schematic structural diagram of a support platform of an anti-sweep tower device provided according to an embodiment of the present invention is shown.

[0021] The above drawings include the following reference numerals:

[0022] 10. Support frame; 11. Ring; 12. Support platform; 13. Frame; 14. Angle plate;

[0023] 20. Elastomer;

[0024] 30. Inspection parts;

[0025] 40. Tower;

[0026] 50. Impeller. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figures 1 to 3 As shown, an embodiment of the present invention provides an anti-sweep tower device, which includes a support frame 10, an elastomer 20 and a detection member 30. The support frame 10 has a tower connection portion; the elastomer 20 is arranged around the outer periphery of the support frame 10, and one end of the elastomer 20 is fixedly connected to the support frame 10; the detection member 30 is arranged on the support frame 10, and the other end of the elastomer 20 is connected to the detection member 30.

[0029] By applying the technical solution of the present invention, the anti-sweep tower device includes a support frame 10, an elastomer 20 and a detection member 30. The support frame 10 is connected to the tower through a tower connection portion. Since the elastomer 20 is arranged around the outer periphery of the support frame 10, after the blades of the wind turbine are deformed, the ends of the blades will contact the elastomer 20, and then the elastomer 20 will be stress-deformed. The stress deformation of the elastomer 20 can be detected by the detection member 30, and the operating state of the unit can be controlled by detecting the stress deformation of the elastomer 20. In addition, since the elastomer 20 is provided, the ends of the blades can be prevented from directly contacting the tower, thereby reducing damage to the blades and the tower. Compared with the method of using laser detection, the cost is reduced and the adaptability is improved.

[0030] The detection member 30 is a stress sensor for detecting the stress of the elastic body.

[0031] It should be noted that the elastic body 20 should be in a stretched state after being wound so as to have a certain elastic deformation so that the elastic body 20 can be deformed in time after the blade ends come into contact.

[0032] Specifically, the stress sensor is connected to the controller by a wire, and the wire has a certain redundancy to prevent the wire from being torn off.

[0033] like Figure 2 As shown, a plurality of connection components are arranged on the support frame 10, and the plurality of connection components are arranged at intervals along the vertical direction. The connection components include a plurality of rings 11 arranged at intervals along the circumference of the support frame 10, and the elastic body 20 is sequentially passed through the plurality of rings 11. With the above arrangement, the elastic body can be wound around the support frame 10 through the plurality of rings 11, which has the advantages of simple structure and easy assembly.

[0034] The elastic body 20 should vertically cover the entire support frame 10 at the periphery of the support frame 10 , so that the blades can contact the elastic body 20 after deformation under different blade deformation degrees.

[0035] It should be noted that the elastic body 20 can be wound in a spiral manner or in a staggered winding manner as provided in this embodiment.

[0036] like Figure 2 As shown, there are two connecting assemblies, which are respectively arranged at the upper end and the lower end of the support frame 10, and the elastic body 20 is staggered through the ring 11 of the upper connecting assembly and the ring 11 of the lower connecting assembly. The above connection method has the advantages of simple structure and easy operation.

[0037] In this embodiment, the stress sensor is arranged at the bottom of the support frame 10 and close to one of the circular rings 11. In the circumferential direction, the angle between two adjacent circular rings 11 is no greater than 30°.

[0038] like Figure 2 and Figure 3 As shown, the support frame 10 includes a support platform 12 and a frame body 13 disposed on the support platform 12. The support platform 12 and the frame body 13 are both sleeved on the outer periphery of the tower 40. The connection part of the tower 40 is disposed on the support platform 12. The plurality of rings 11, the elastic body 20 and the detection member 30 are all disposed on the frame body 13. The support frame 10 has the advantages of simple structure and easy processing.

[0039] In this embodiment, the frame 13 is a frame structure, and the stress sensor is arranged inside the frame. When the blade is greatly deformed and is about to hit the tower, the blade first hits the elastic rope. On the one hand, the elastic rope plays a certain buffering role. On the other hand, after the stress sensor detects the stress change of the elastic rope, it transmits the information to the controller and performs an emergency shutdown.

[0040] The bottom of the frame 13 is connected and fixed to the support platform by ropes or steel wires.

[0041] Furthermore, a positioning groove is provided on the support platform 12, and the frame 13 is located in the positioning groove. The frame 13 is positioned on the support platform 12 by using the positioning groove, so that the frame 13 can be more stable.

[0042] Specifically, the thickness of the support platform 12 is greater than or equal to 0.5 m. With the above dimensions, the support platform 12 has reasonable strength.

[0043] The thickness of the support platform 12 refers to the dimension of the support platform 12 in the radial direction.

[0044] The thickness of the support platform 12 may be 0.5 m, 0.6 m, 0.7 m, 0.8 m, or any value greater than or equal to 0.5 m.

[0045] The outer diameter of the frame 13 is greater than or equal to 1 m. The above size range can meet standard requirements and deformation of blades under extreme loads.

[0046] like Figure 3 As shown, the tower connection portion includes a plurality of angle plates 14 arranged at the lower end of the support frame 10. The plurality of angle plates 14 are arranged at intervals along the circumference of the support frame 10. The connection method using the angle plates 14 has the advantages of simple structure and easy operation.

[0047] In this embodiment, the supporting platform 12 and the angle plate 14 are both made of metal materials such as steel plates, and are installed and fixed on the tower by welding.

[0048] The elastic body 20 includes an elastic rope.

[0049] It should be noted that there are multiple elastomers 20 and detection parts 30, and the winding radius of each elastomer 20 is different. With the above-mentioned arrangement, by detecting the deformed and undeformed elastomers 20 of multiple elastomers 20, the elastomer 20 with zero stress change can be found, and then the actual deformation of the blade can be determined, thereby controlling the unit to adopt different levels of safety operations.

[0050] In this embodiment, the anti-sweep tower device further includes a controller, and the controller is signal-connected to the detection member 30, and the detection member 30 can transmit the detection signal of the elastic body 20 to the controller. The controller can control the working state of the unit according to the strain of the elastic body 20 detected by the detection member 30.

[0051] Among them, when the blade tip deforms too much and hits the elastic rope, the elastic rope is deformed and broken due to excessive load. At this time, the stress value of the stress sensor is zero, and the unit is shut down urgently through control, thereby ensuring the safety of the unit.

[0052] Another embodiment of the present invention provides a wind turbine, which includes a tower 40, an impeller 50, and an anti-sweep tower device, wherein the impeller 50 is rotatably arranged on the tower 40; the support frame 10 of the anti-sweep tower device is connected to the tower 40, and the end of the impeller 50 can contact the elastomer 20 of the anti-sweep tower device, and the anti-sweep tower device is the anti-sweep tower device provided above. The support frame 10 is connected to the tower through the tower connection part. Since the elastomer 20 is arranged around the outer periphery of the support frame 10, after the blades of the wind turbine are deformed, the ends of the blades will contact the elastomer 20, and then the elastomer 20 will be stress-deformed. The stress deformation of the elastomer 20 can be detected by the detection member 30, and the operating state of the unit can be controlled by detecting the stress deformation of the elastomer 20. In addition, since the elastomer 20 is arranged, the blade ends can be prevented from directly contacting the tower, reducing the damage to the blades and the tower. Compared with the method of using laser detection, the cost is reduced and the adaptability is improved.

[0053] The vertical distance between the contact position between the end of the impeller 50 and the elastic body 20 and the lowest point of the support frame 10 is greater than or equal to 0.5 m. With the above size range, after the blade is deformed, its end can contact the elastic body 20, so that the anti-sweep tower device can work.

[0054] Specifically, the vertical distance between the contact position between the end of the impeller 50 and the elastic body 20 and the lowest point of the support frame 10 can be 0.5m, 0.6m, 0.7m, 0.8m, or any value greater than or equal to 0.5m.

[0055] The vertical distance between the contact position between the end of the impeller 50 and the elastic body 20 and the highest point of the support frame 10 is greater than or equal to 1m. With the above size range, after the blade is deformed, its end can contact the elastic body 20, so that the anti-sweep tower device can work.

[0056] Specifically, the vertical distance between the contact position between the end of the impeller 50 and the elastic body 20 and the highest point of the support frame 10 can be 1m, 1.1m, 1.2m, 1.3m, 1.4m, 1.5m, or any value greater than or equal to 0.5m.

[0057] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0058] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0059] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0060] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0061] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0062] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An anti-sweeping tower device, characterized in that: The anti-sweep tower device comprises: A support frame (10) having a tower connection portion; An elastic body (20) is wound around the outer circumference of the support frame (10), and one end of the elastic body (20) is fixedly connected to the support frame (10); A detection member (30) is arranged on the support frame (10), and the other end of the elastic body (20) is connected to the detection member (30).

2. The anti-sweeping tower device according to claim 1, characterized in that: The support frame (10) is provided with a plurality of connection components, the plurality of connection components are arranged at intervals in the vertical direction, the connection components include a plurality of circular rings (11) arranged at intervals in the circumferential direction of the support frame (10), and the elastic body (20) is sequentially passed through the plurality of circular rings (11).

3. The anti-sweeping tower device according to claim 2, characterized in that: There are two connecting assemblies, which are respectively arranged at the upper end and the lower end of the support frame (10), and the elastic body (20) is staggered and penetrates the circular ring (11) of the connecting assembly at the upper end and the circular ring (11) of the connecting assembly at the lower end.

4. The anti-sweeping tower device according to claim 2, characterized in that: The support frame (10) comprises a support platform (12) and a frame body (13) arranged on the support platform (12); the support platform (12) and the frame body (13) are both sleeved on the outer circumference of a tower (40); a connecting portion of the tower (40) is arranged on the support platform (12); and a plurality of the rings (11), the elastic body (20) and the detection element (30) are all arranged on the frame body (13).

5. The anti-sweeping tower device according to claim 4, characterized in that: The support platform (12) is provided with a positioning groove, and the frame (13) is located in the positioning groove.

6. The anti-sweeping tower device according to claim 4, characterized in that: The thickness of the support platform (12) is greater than or equal to 0.5 m; and / or, The outer diameter of the frame (13) is greater than or equal to 1 m.

7. The anti-sweeping tower device according to claim 1, characterized in that: The tower connection portion comprises a plurality of angle plates (14) arranged at the lower end of the support frame (10), wherein the plurality of angle plates (14) are arranged at intervals along the circumference of the support frame (10); and / or, The elastic body (20) includes an elastic cord.

8. The anti-sweeping tower device according to claim 1, characterized in that: There are a plurality of the elastic body (20) and the detection element (30), and each of the elastic body (20) has a different winding radius; and / or, The anti-sweeping tower device also includes a controller, and the controller and the detection element (30) are both signal-connected, and the detection element (30) can transmit the detection signal of the elastic body (20) to the controller.

9. A fan, characterized in that: The fan comprises: Tower (40); An impeller (50) rotatably disposed on the tower (40); An anti-sweep tower device, wherein the support frame (10) of the anti-sweep tower device is connected to the tower barrel (40), the end of the impeller (50) can contact the elastomer (20) of the anti-sweep tower device, and the anti-sweep tower device is the anti-sweep tower device described in any one of claims 1 to 8.

10. The fan according to claim 9, characterized in that: The vertical distance between the contact position between the end of the impeller (50) and the elastic body (20) and the lowest point of the support frame (10) is greater than or equal to 0.5 m; and / or, The vertical distance between the contact position between the end of the impeller (50) and the elastic body (20) and the highest point of the support frame (10) is greater than or equal to 1 m.

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