Fan tower drum, vibration reduction method of fan tower drum and wind driven generator

Abstract

The invention relates to a fan tower drum, a vibration reduction method of the fan tower drum and a wind driven generator, the fan tower drum comprises a tower drum body and a plurality of vibration reduction assemblies arranged in the tower drum body, one ends of the multiple vibration reduction assemblies are connected with one another, the other ends of the multiple vibration reduction assemblies are circumferentially spaced and are connected to the drum wall of the tower drum body, and each vibration reduction assembly comprises a pipeline, a plurality of damping assemblies and a plurality of damping assemblies, the interior is hollow; the mass ball is movably arranged in the pipeline; and the two elastic parts are oppositely arranged, and the two elastic parts are arranged at the two ends of the pipeline correspondingly, so that when the tower drum body vibrates, the mass ball can reciprocate between the two elastic parts. When the fan tower drum vibrates, the mass ball can move in the pipeline, the mass ball can reciprocate between the two elastic parts through compression and resilience force of the elastic parts, vibration borne by the fan tower drum can be counteracted through multiple buffering motions of the elastic parts, and the stability and safety of the fan tower drum can be improved; and the structural damage and the maintenance cost caused by vibration are reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of wind power generation, and in particular to a wind turbine tower, a vibration reduction method for a wind turbine tower, and a wind turbine generator. Background Art

[0002] As a crucial supporting structure of a wind turbine, the wind turbine tower is more likely to produce various vibrations under the action of wind loads during its operation, causing the tower to face various vibration problems such as bending vibration and torsional vibration. If the tower has excessive vibration problems, once the vibration limit is exceeded, shutdown measures must be taken to protect the safety of the wind turbine. This will not only reduce its power generation efficiency, but also have many adverse effects on the stability and safety of the wind turbine operation. Summary of the invention

[0003] The purpose of the present disclosure is to provide a wind turbine tower, a vibration reduction method for a wind turbine tower and a wind turbine generator, so as to solve the vibration problem of the wind turbine tower existing in the related art.

[0004] In order to achieve the above-mentioned object, the present disclosure provides a wind turbine tower, comprising a tower body and a plurality of vibration reduction assemblies arranged in the tower body, wherein one end of the plurality of vibration reduction assemblies are connected to each other, and the other ends are circumferentially spaced and respectively connected to the cylinder wall of the tower body, and each of the vibration reduction assemblies comprises: Pipe, hollow inside; a mass ball movably disposed in the pipe; and Two elastic parts are arranged opposite to each other, and the two elastic parts are arranged at two ends of the pipeline respectively, so that when the tower body vibrates, the mass ball can reciprocate between the two elastic parts.

[0005] Optionally, the elastic portion includes: Connecting seat; A buffer seat capable of contacting the mass ball; A first telescopic rod, two ends of which are respectively connected to the connecting seat and the buffer seat; and A first elastic member, wherein two ends of the first elastic member are respectively connected to the connecting seat and the buffer seat.

[0006] Optionally, there are multiple first telescopic rods and multiple first elastic members, and the multiple first telescopic rods are arranged at intervals, the multiple first elastic members are arranged in a one-to-one correspondence with the first telescopic rods, and the first elastic member is a spring sleeved on the outside of the first telescopic rod.

[0007] Optionally, the buffer seat comprises: A connecting ring connected to the first telescopic rod; and The elastic net is connected to the middle area of ​​the connecting ring and can contact with the mass ball.

[0008] Optionally, the elastic portion further includes a second telescopic rod, and the connecting seat and the buffer seat are arranged on the second telescopic rod at intervals along an extension direction of the second telescopic rod, wherein the buffer seat is connected to an end portion of the second telescopic rod.

[0009] Optionally, the tower body further comprises a tower platform, wherein the tower platform is connected to the inner side of the tower wall and supports the pipeline from below.

[0010] Optionally, an opening for placing the mass ball is provided on the side wall of the pipe, and the opening is close to one of the two elastic parts which is closer to the cylinder wall.

[0011] Optionally, the intersection point where the multiple vibration damping assemblies are connected to each other is located at the center point of the cross section of the tower body, and the angle between every two adjacent vibration damping assemblies is the same.

[0012] Optionally, the wind turbine tower further includes: A thrust piece, one end of which is connected to the cylinder wall; A third telescopic rod, one end of which is connected to the output end of the thrust member, and the other end of which is connected to one of the elastic parts; a vibration sensing element electrically connected to the thrust member; and A controller is connected to the vibration sensor element and the thrust piece respectively.

[0013] According to a second aspect of the present disclosure, a wind turbine generator comprises the above-mentioned wind turbine tower.

[0014] According to a third aspect of the present disclosure, a vibration reduction method for a wind turbine tower is provided, using the wind turbine tower described above, the vibration reduction method comprising: When the vibration value of the tower body detected by the vibration sensor element exceeds a preset threshold, the thrust piece is controlled to provide thrust to the mass ball, so that the mass ball can move toward the elastic part on the side away from the cylinder wall.

[0015] Through the above technical solution, multiple vibration reduction components are arranged on the inner side of the cylinder wall of the wind turbine tower. When the wind turbine tower vibrates, the mass ball can move in the pipeline, and the mass ball can reciprocate between the two elastic parts through the compression and rebound force of the elastic part. Not only can the vibration of the wind turbine tower be offset by the multiple buffering movements of the elastic part, but also, since the cause of the wind turbine vibration is usually the influence of the force on the cylinder wall from the outside of the cylinder wall, when the mass ball contacts the elastic part close to the cylinder wall, the vibration can be transmitted to the cylinder wall through the reaction force received by the elastic part, offsetting the external force on the cylinder wall, further reducing the vibration amplitude of the tower body, and achieving the purpose of vibration reduction. Therefore, the setting of the vibration reduction component can not only improve the stability and safety of the wind turbine tower, but also help to extend its service life and reduce structural damage and maintenance costs caused by vibration.

[0016] Other features and advantages of the present disclosure will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The accompanying drawings are used to provide a further understanding of the present disclosure and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present disclosure but do not constitute a limitation of the present disclosure. In the accompanying drawings: Figure 1 is a schematic diagram of a wind turbine according to an embodiment of the present disclosure.

[0018] Figure 2 yes Figure 1 Schematic diagram of the cross section of part A of the foundation.

[0019] Figure 3 It is a schematic diagram of a wind turbine tower according to an embodiment of the present disclosure.

[0020] Figure 4 It is a schematic diagram of a vibration reduction assembly in a wind turbine tower according to an embodiment of the present disclosure.

[0021] Figure 5 It is a schematic diagram of an elastic part and a driving part in a wind turbine tower according to an embodiment of the present disclosure.

[0022] Figure 6 It is a schematic diagram of an elastic portion in a wind turbine tower according to an embodiment of the present disclosure.

[0023] Figure 7 It is a schematic diagram of a driving part in a wind turbine tower according to an embodiment of the present disclosure.

[0024] Description of Reference Numerals 1-tower body; 100-vibration reduction assembly; 11-tube wall; 111-tower platform; 21-third telescopic rod; 22-second elastic member; 3-elastic part; 31-connecting seat; 32-buffer seat; 321-connecting ring; 322-elastic net; 33-first telescopic rod; 34-first elastic member; 35-second telescopic rod; 4-pipeline; 41-opening; 42-adhesion layer; 5-mass ball. DETAILED DESCRIPTION

[0025] The specific implementation of the present disclosure is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described herein is only used to illustrate and explain the present disclosure, and is not used to limit the present disclosure.

[0026] In the present disclosure, unless otherwise stated, directional words such as "upper" and "lower" are defined for the layout direction of the wind turbine when it is actually used, and directional words such as "inner" and "outer" are defined for the outline of the corresponding components. The terms "first" and "second" are used to distinguish different components and do not have order and importance. In addition, in the following description, when referring to the drawings, unless otherwise explained, the same figure numbers in different drawings represent the same or similar elements.

[0027] According to one embodiment of the present disclosure, Figures 1 to 7 As shown, a wind turbine tower is provided, comprising a tower body 1 and a plurality of vibration reduction assemblies 100 arranged in the tower body 1, one end of the plurality of vibration reduction assemblies 100 are connected to each other, and the other ends are circumferentially spaced and respectively connected to the cylinder wall 11 of the tower body 1, and each vibration reduction assembly 100 comprises an elastic part 3, a pipe 4 and a mass ball 5. The interior of the pipe 4 is hollow, and the mass ball 5 is movably arranged in the pipe 4. There are two elastic parts 3 and they are arranged oppositely, and the two elastic parts 3 are respectively arranged at the two ends of the pipe 4, so that when the tower body 1 vibrates, the mass ball 5 can reciprocate between the two elastic parts 3.

[0028] Through the above technical solution, a plurality of vibration reduction components 100 are arranged on the inner side of the cylinder wall 11 of the wind turbine tower. When the wind turbine tower vibrates, the mass ball 5 can move in the pipe 4, and the mass ball 5 can reciprocate between the two elastic parts 3 through the compression and rebound force of the elastic part 3. Not only can the vibration of the wind turbine tower be offset by the multiple buffering movements of the elastic part 3, but also, since the cause of the wind turbine vibration is usually the influence of the force on the cylinder wall 11 on the cylinder wall 11 from the outside of the cylinder wall 11, when the mass ball 5 contacts the elastic part 3 on the side of the cylinder wall 11, the vibration can be transmitted to the cylinder wall 11 through the reaction force received by the elastic part 3, offsetting the external force on the cylinder wall 11, further reducing the vibration amplitude of the tower body 1, and achieving the purpose of vibration reduction. Therefore, the provision of the vibration reduction component 100 can not only improve the stability and safety of the wind turbine tower, but also help to extend its service life and reduce the structural damage and maintenance cost caused by vibration.

[0029] It should be noted that, with regard to the connection method between the vibration reduction assembly 100 and the cylinder wall 11, one end of the pipe 4 can be connected to the cylinder wall 11, and the other end can be interconnected with other pipes 4, and the elastic part 3 is arranged inside the pipe 4 and is limited at both ends of the pipe 4, and one of the elastic parts 3 can contact the cylinder wall 11, so that when the mass ball 5 contacts the elastic part 3, the reaction force can be transmitted to the cylinder wall 11 through the contact between the elastic part 3 and the cylinder wall 11. Alternatively, the two ends of the pipe 4 can be directly connected to the two elastic parts 3, one elastic part 3 is directly connected to the cylinder wall 11 or to the thrust member described below, and the other elastic part 3 is directly connected to the elastic part 3 on the side away from the cylinder wall 11 in other vibration reduction assemblies 100, and the connection method can be screw connection or welding, which is not limited in the present disclosure.

[0030] Further, as shown in Figures 3 to Figure 6As shown, the elastic part 3 may include a connecting seat 31, a buffer seat 32, a first telescopic rod 33 and a first elastic member 34. In the scheme where the elastic part 3 is directly connected to the cylinder wall 11 or the thrust member described below, the connecting seat 31 of the elastic part 3 close to the cylinder wall 11 may be directly connected to the cylinder wall 11 or the thrust member, and the connecting seats 31 of the elastic part 3 away from the cylinder wall 11 may be connected to each other, which is not limited in the present disclosure. The buffer seat 32 can contact the mass ball 5, and the two ends of the first telescopic rod 33 can be connected to the connecting seat 31 and the buffer seat 32 respectively. The two ends of the first elastic member 34 are connected to the connecting seat 31 and the buffer seat 32 respectively. When the mass ball 5 contacts the buffer seat 32, the length of the first telescopic rod 33 is reduced, and at the same time, the first elastic member 34 is compressed to store elastic force until it is compressed to the limit and then rebounds. At this time, the first elastic member 34 is in a restored state, driving the length of the first telescopic rod 33 to increase, and at the same time driving the buffer seat 32 to move toward the opposite elastic part 3 and apply force to the mass ball 5 to make the mass ball 5 pop out and move toward the opposite elastic part 3. Here, the first elastic member 34 can effectively absorb and disperse vibration energy and play a buffering role. The first telescopic rod 33 can ensure the stable connection between the connecting seat 31 and the buffer seat 32. The number of the first telescopic rod 33 and the first elastic member 34 can be multiple, and the multiple first telescopic rods 33 can be arranged at intervals, and the multiple first elastic members 34 can be arranged one by one with the first telescopic rods 33, and the first elastic member 34 is sleeved on the outside of the first telescopic rod 33, and the first elastic member 34 can be rubber or a spring, which can not only provide a more uniform vibration reduction effect, but also ensure the overall stability of the elastic part 3, and effectively reduce the vibration amplitude of the tower body 1.

[0031] Furthermore, if Figures 3 to 6 As shown, the buffer seat 32 may include a connecting ring 321 and an elastic net 322. The connecting ring 321 may be connected to the first telescopic rod 33, and the elastic net 322 may be connected to the middle area of ​​the connecting ring 321 and may be in contact with the mass ball 5. The elastic net 322 may be a mesh structure formed by interweaving a plurality of springs or a plurality of elastic rubbers, so as to more effectively absorb and disperse vibration energy and further improve vibration reduction efficiency.

[0032] According to one embodiment of the present disclosure, Figures 3 to 6 As shown, the elastic part 3 may further include a second telescopic rod 35, and the connecting seat 31 and the buffer seat 32 are arranged on the second telescopic rod 35 at intervals along the extension direction of the second telescopic rod 35, wherein the buffer seat 32 is connected to the end of the second telescopic rod 35. The second telescopic rod 35 can make the connection between the buffer seat 32 and the connecting seat 31 more stable, thereby improving the stability of the connection of the vibration reduction assembly 100.

[0033] According to one embodiment of the present disclosure, Figure 2 and Figure 3As shown, the tower body 1 also includes a tower platform 111, which is connected to the inner side of the cylinder wall 11 and can support the pipeline 4 from below. The tower platform 111 can be a plane that forms an angle with the extension direction of the tower body 1 to separate the tower body 1 in the height direction. Here, the tower platform 111 can also be provided with an opening for the cable and the elevator to pass through, and the opening can be set at a position that avoids the setting position of the vibration reduction assembly. The setting of the tower platform 111 can enhance the structural strength of the tower body 1, and can provide a stable support for the vibration reduction assembly 100 below the vibration reduction assembly 100, so that the vibration reduction assembly 100 can be firmly fixed in the tower body 1 to prevent loosening or breaking and falling off due to vibration. In addition, the tower platform 111 can also disperse and withstand the vibration energy from the tower body 1, further improving the vibration reduction effect. Here, the pipeline 4 can also be directly connected to the tower platform 111 to improve the strength of the pipeline 4. Specifically, the pipeline 4 can be screwed or bonded to the tower platform 111, and the present disclosure does not limit this. When the pipeline 4 is bonded to the tower platform 111, the surface of the adhesive layer 42 in contact with the pipeline 4 and the tower platform 111 can be a rough surface, so as to reduce the degree of shaking, improve the stability of the vibration reduction assembly 100, and improve the vibration reduction effect.

[0034] According to one embodiment of the present disclosure, Figure 4 As shown, an opening 41 for placing the mass ball 5 may also be provided on the side wall of the pipe 4, and the opening 41 is close to one of the two elastic parts 3 that is closer to the barrel wall 11. Providing the opening 41 on the side wall of the pipe 4 facilitates the installation and replacement of the mass ball 5, so that the mass ball 5 can be more easily placed in or taken out of the pipe, which simplifies the maintenance process, improves work efficiency, and ensures the normal operation of the vibration reduction assembly 100. The opening 41 is close to one of the two elastic parts 3 that is closer to the barrel wall 11, which can also ensure that the initial position of the mass ball 5 is in contact with the elastic part 3 close to the barrel wall 11. In the scheme where the elastic part 3 close to the barrel wall 11 is connected to the thrust piece, it can also be convenient for the tower body 1 to vibrate, and the thrust piece can directly bounce the mass ball 5 to the opposite elastic part 3 when it is started.

[0035] According to one embodiment of the present disclosure, Figure 2 and Figure 3 As shown, the intersection of multiple vibration reduction assemblies 100 connected to each other can be located at the center point of the cross section of the tower body 1, and the angle between each two adjacent vibration reduction assemblies 100 is the same, so as to achieve a more balanced vibration reduction effect and effectively disperse and absorb vibration energy. Improve the overall stability and wind resistance of the wind turbine tower. Under the action of wind force, the tower body 1 can bear the vibration energy more evenly, reducing the risk of structural damage caused by excessive local vibration.

[0036] According to one embodiment of the present disclosure, Figures 3 to 7 As shown, the wind turbine tower may also include a thrust piece, a third telescopic rod 21, a vibration sensor element and a controller. One end of the thrust piece is connected to the cylinder wall 11, one end of the third telescopic rod 21 is connected to the output end of the thrust piece, and the other end is connected to one of the elastic parts 3. Here, in the scheme where the elastic part 3 includes a connecting seat 31, a buffer seat 32 and a second telescopic rod 35, the third telescopic rod 21 can be arranged inside the second telescopic rod 35, and the end of the third telescopic rod 21 is connected to the buffer seat 32, and the second elastic piece 22 can also be arranged in the third telescopic rod 21. The vibration sensor element can be electrically connected to the thrust piece, and the controller can be connected to the vibration sensor element and the thrust piece respectively. The vibration sensor element can monitor the vibration of the tower body in real time and transmit the signal to the controller, and the thrust piece is controlled by the controller to realize active control and regulation of the vibration. The thrust piece can be a motor, or a cylinder or a hydraulic cylinder, which is not limited in the present disclosure.

[0037] Specifically, the present disclosure also provides a vibration reduction method for a wind turbine tower. The vibration reduction method is that when the vibration sensor element detects that the vibration value of the tower body 1 exceeds a preset threshold, the controller controls the thrust piece to push the third telescopic rod 21 to drive the elastic part 3 connected to it to pop out, thereby providing thrust to the mass ball 5 to move the mass ball 5 toward the elastic part 3 on the side away from the cylinder wall 11. When it moves to the elastic part 3 on the opposite side, the elastic part 3 on the opposite side rebounds the mass ball 5 until the mass ball 5 is released from the elastic part 3 on the side close to the cylinder wall 11, so as to transmit the reaction force to the cylinder wall 11 to offset the external load on the cylinder wall 11. At this time, the continuous vibration applied to the outside of the wind turbine tower is too large, and there is a high safety risk for the wind turbine tower. It is not enough to resist the risk brought by external vibration only by the cylinder wall 11 transmitting the vibration to the mass ball 5 and then slowly reducing the vibration through the elastic movement of the elastic part 3. Therefore, the controller controls the thrust piece to generate thrust to push the mass ball 5 to move, and increases the force on the inner side of the cylinder wall 11 through the reaction force provided by the elastic part 3 to the mass ball 5, so that the internal force and external force applied to the cylinder wall 11 can be offset, so as to improve the stability and safety of the tower body 1.

[0038] On the basis of the above scheme, the present disclosure further provides a wind turbine generator, which includes the above wind turbine tower, and the wind turbine generator has all the beneficial effects of the above wind turbine tower, which will not be repeated here.

[0039] The preferred embodiments of the present disclosure are described in detail above in conjunction with the accompanying drawings; however, the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, a variety of simple modifications can be made to the technical solution of the present disclosure, and these simple modifications all fall within the protection scope of the present disclosure.

[0040] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present disclosure will not further describe various possible combinations.

[0041] In addition, various embodiments of the present disclosure may be arbitrarily combined, and as long as they do not violate the concept of the present disclosure, they should also be regarded as the contents disclosed by the present disclosure.

Claims

1. A wind turbine tower, characterized in that: The tower body comprises a tower body and a plurality of vibration reduction assemblies arranged in the tower body, wherein one end of the plurality of vibration reduction assemblies are connected to each other, and the other ends are circumferentially spaced and respectively connected to the wall of the tower body, and each of the vibration reduction assemblies comprises: Pipe, hollow inside; a mass ball movably disposed in the pipe; and Two elastic parts are arranged opposite to each other, and the two elastic parts are arranged at two ends of the pipeline respectively, so that when the tower body vibrates, the mass ball can reciprocate between the two elastic parts.

2. The wind turbine tower according to claim 1, characterized in that: The elastic portion comprises: Connecting seat; A buffer seat capable of contacting the mass ball; A first telescopic rod, two ends of which are respectively connected to the connecting seat and the buffer seat; and A first elastic member, wherein two ends of the first elastic member are respectively connected to the connecting seat and the buffer seat.

3. The wind turbine tower according to claim 2, characterized in that: There are multiple first telescopic rods and multiple first elastic members, and the multiple first telescopic rods are arranged at intervals. The multiple first elastic members are arranged in a one-to-one correspondence with the first telescopic rods, and the first elastic member is a spring sleeved on the outside of the first telescopic rod.

4. The wind turbine tower according to claim 2, characterized in that: The buffer seat comprises: A connecting ring connected to the first telescopic rod; and The elastic net is connected to the middle area of ​​the connecting ring and can be in contact with the mass ball.

5. The wind turbine tower according to claim 2, characterized in that: The elastic part further includes a second telescopic rod, and the connecting seat and the buffer seat are arranged on the second telescopic rod at intervals along the extension direction of the second telescopic rod, wherein the buffer seat is connected to the end of the second telescopic rod.

6. The wind turbine tower according to claim 1, characterized in that: The tower body further comprises a tower platform, which is connected to the inner side of the tower wall and supports the pipeline from below.

7. The wind turbine tower according to claim 1, characterized in that: An opening for placing the mass ball is formed on the side wall of the pipe, and the opening is close to one of the two elastic parts that is closer to the cylinder wall.

8. The wind turbine tower according to claim 1, characterized in that: The intersection point where the multiple vibration-damping assemblies are connected to each other is located at the center point of the cross section of the tower body, and the angles between every two adjacent vibration-damping assemblies are the same.

9. The wind turbine tower according to any one of claims 1 to 8, characterized in that: The wind turbine tower also includes: A thrust piece, one end of which is connected to the cylinder wall; A third telescopic rod, one end of which is connected to the output end of the thrust member, and the other end of which is connected to one of the elastic parts; a vibration sensing element electrically connected to the thrust member; and A controller is connected to the vibration sensor element and the thrust piece respectively.

10. A wind turbine generator, characterized in that: The wind turbine tower comprises the wind turbine tower according to any one of claims 1 to 9.

11. A method for reducing vibration of a wind turbine tower, characterized in that: Using the wind turbine tower described in claim 9, the vibration reduction method comprises: When the vibration value of the tower body detected by the vibration sensor element exceeds a preset threshold, the thrust piece is controlled to provide thrust to the mass ball, so that the mass ball can move toward the elastic part on the side away from the cylinder wall.

Images