Single pendulum vibration reduction device and wind turbine generator set

Abstract

The present application provides a single pendulum vibration reduction device and a wind turbine generator set, wherein the single pendulum vibration reduction device comprises a mounting part, a pendulum, a conductor part and a magnetic part. The pendulum is swingably suspended on the structure to be damped. One of the conductor part and the magnetic part is arranged on the mounting part, and the other is arranged on the pendulum. The pendulum can move relative to the mounting part. When the pendulum moves relative to the mounting part, the positions of the conductor part and the magnetic part change relative to each other to generate a magnetic field to hinder the swing of the pendulum. The provision of the conductor part and the magnetic part can hinder the swing of the pendulum, thereby improving the damping ratio of the single pendulum vibration reduction device, and can effectively consume the energy of the vibration of the structure to be damped, so that the vibration reduction effect is better.

Description

Technical Field

[0001] The present application relates to the field of vibration reduction control, and in particular to a single-pendulum vibration reduction device and a wind turbine generator set. Background Art

[0002] Because wind turbines are affected by airflow and waves, and their own rotating parts are unbalanced, airflow or waves passing through the smooth tower surface can easily cause vortex-induced resonance of the tower, which will affect the safety and fatigue life of the wind turbine. At present, the displacement of the top of the all-steel flexible tower with a low natural frequency is large, which can easily cause first-order or second-order vortex-induced resonance.

[0003] Some structures to be damped, such as wind turbines, are equipped with vibration damping devices to reduce the vibration of the tower. The vibration damping device may be a pendulum vibration damping device, which may refer to a mass block suspended on the tower with a steel cable. When the tower vibrates, the pendulum mass block moves in the opposite direction under the action of inertia force, absorbing the energy generated by the vibration of the tower, thereby suppressing the vibration of the tower. However, the damping of some pendulum vibration damping devices is relatively small, and they cannot effectively consume the energy generated by the vibration of the tower, and the vibration reduction effect is poor. Summary of the invention

[0004] The present application provides a single-pendulum vibration reduction device and a wind turbine generator set, which have good vibration reduction effect.

[0005] In a first aspect, the present application provides a single pendulum vibration reduction device, comprising:

[0006] Mounting parts;

[0007] A pendulum swingably suspended from the structure to be damped; and

[0008] A conductor and a magnetic member, one of which is disposed on the mounting member, and the other is disposed on the pendulum;

[0009] The pendulum can move relative to the mounting member; when the pendulum moves relative to the mounting member, the positions of the conductor member and the magnetic member change relative to each other to generate a magnetic field to hinder the swing of the pendulum.

[0010] Furthermore, the mounting member includes a fixing frame; the pendulum includes a swing rod; the swing rod includes a first end and a second end opposite to each other, the first end is swingably suspended on the structure to be damped, one of the conductor member and the magnetic member is arranged on the second end, and the other is arranged on the fixing frame; when the pendulum swings, the second end of the swing rod is driven to swing relative to the fixing frame.

[0011] Furthermore, the pendulum includes a slider, which is arranged at the second end; one of the conductor and the magnetic member is arranged on the slider, and the other is arranged flatly on the bottom surface of the fixed frame; when the pendulum swings, it drives the slider to slide relative to the bottom surface of the fixed frame.

[0012] Furthermore, the rocker arm includes a spherical end arranged at the second end; the slider is provided with a receiving groove, the bottom surface of the receiving groove is an arc surface matching the spherical end, and the spherical end can be movably arranged in the receiving groove.

[0013] Furthermore, one of the conductor and the magnetic member is arranged at the second end, and the other is arranged on the bottom surface of the fixing frame, and a side of the other of the conductor and the magnetic member close to the pendulum is an arc-shaped surface bent along the swing direction of the pendulum.

[0014] Furthermore, the pendulum includes a pendulum rod and a mass block fixedly connected to the pendulum rod; the mounting member includes a sliding block movably connected to the pendulum rod; one of the conductor member and the magnetic member is arranged on the sliding block, and the other is arranged on the mass block; when the pendulum swings, it drives the sliding block to slide relative to the mass block.

[0015] Furthermore, the mounting member further comprises a fixing frame, and the pendulum is arranged in the fixing frame; in a direction perpendicular to the pendulum rod, the length of the sliding block is greater than the length of the mass block; and / or

[0016] The other of the conductor and the magnetic member is disposed on a side of the mass block close to the sliding block; and / or

[0017] The number of the sliding blocks is at least two, and the sliding blocks are arranged along the length direction of the swing rod.

[0018] Further, the sliding block is provided with a sliding groove which passes through the vertical direction of the swing rod, and the swing rod is slidably arranged in the sliding groove; one of the conductor and the magnetic member is arranged near the edge of the sliding groove; and / or

[0019] The mass block is circular in shape, and the other of the conductor member and the magnetic member is plural in number and evenly distributed along the radial direction of the mass block.

[0020] Further, the pendulum includes a pendulum rod and a mass block fixedly connected to the pendulum rod; the mounting member includes a fixing frame and a sliding block movably connected to the pendulum rod; the conductor member includes a first conductor member and a second conductor member, and the magnetic member includes a first magnetic member and a second magnetic member;

[0021] The swing rod comprises a first end and a second end opposite to each other, the first end is swingably suspended on the structure to be damped, one of the first conductor and the first magnetic member is arranged on the second end, and the other is arranged on the fixing frame; one of the second conductor and the second magnetic member is arranged on the sliding block, and the other is arranged on the mass block;

[0022] When the pendulum swings, it drives the second end of the pendulum rod to swing relative to the fixing frame, and drives the sliding block to slide relative to the mass block.

[0023] In a second aspect, the present application provides a wind turbine generator set, comprising a tower and a single-pendulum vibration reduction device as described in any of the above embodiments, wherein the single-pendulum vibration reduction device is connected to the tower.

[0024] The single pendulum vibration reduction device provided in the present application includes a mounting part, a pendulum, a conductor part and a magnetic part. The pendulum is swingably suspended on the structure to be damped. One of the conductor part and the magnetic part is arranged on the mounting part, and the other is arranged on the pendulum. The pendulum can move relative to the mounting part. When the pendulum moves relative to the mounting part, the positions of the conductor part and the magnetic part change relative to each other to generate a magnetic field to hinder the swing of the pendulum. The provision of the conductor part and the magnetic part can hinder the swing of the pendulum, thereby improving the damping ratio of the single pendulum vibration reduction device, and can effectively consume the energy of the vibration of the structure to be damped, so that the vibration reduction effect is better.

[0025] It should be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0027] Figure 1 Shown is a schematic plan view of a wind turbine generator set according to an exemplary embodiment of the present application;

[0028] Figure 2 Shown is a schematic structural diagram of a single pendulum vibration reduction device according to an exemplary embodiment of the present application;

[0029] Figure 3 Shown Figure 2 A top view of the slider of the single pendulum vibration reduction device shown;

[0030] Figure 4 Shown is a structural schematic diagram of a single pendulum vibration reduction device according to another exemplary embodiment of the present application;

[0031] Figure 5 Shown Figure 4A top view of the mass block of the single pendulum vibration reduction device shown;

[0032] Figure 6 Shown Figure 4 A top view of the sliding block of the single pendulum vibration reduction device shown;

[0033] Figure 7 Shown is a structural schematic diagram of a single pendulum vibration reduction device according to another exemplary embodiment of the present application;

[0034] Figure 8 Shown is a schematic structural diagram of a single pendulum vibration reduction device according to another exemplary embodiment of the present application. DETAILED DESCRIPTION

[0035] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0036] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. Unless otherwise defined, the technical terms or scientific terms used in this application should be understood by people with ordinary skills in the field to which this application belongs. The words "first", "second" and similar words used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one" or "one" do not indicate a quantitative limit, but indicate that there is at least one. "Multiple" or "several" means two or more. Unless otherwise specified, words such as "front", "rear", "lower" and / or "upper" are only for the convenience of explanation and are not limited to one position or one spatial orientation. Words such as "include" or "comprise" mean that the elements or objects appearing in front of "include" or "comprise" include the elements or objects listed after "include" or "comprise" and their equivalents, and do not exclude other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, and can include electrical connections, whether direct or indirect.

[0037] The terms used in this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The singular forms of "a", "said" and "the" used in this application and the appended claims are also intended to include plural forms unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0038] The present application provides a single pendulum vibration reduction device and a wind turbine generator set. The single pendulum vibration reduction device and the wind turbine generator set of the present application are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the features of the following embodiments and implementations can be combined with each other.

[0039] See also Figure 1 and Figure 2 As shown, the present application provides a wind turbine generator set 10 for converting wind energy into electrical energy. The wind turbine generator set 10 includes a tower 11 and a single-pendulum vibration reduction device 12, and the single-pendulum vibration reduction device 12 is connected to the tower 11. The single-pendulum vibration reduction device 12 can be connected to the top of the tower 11 or the middle of the tower 11. Among them, the single-pendulum vibration reduction device 12 can be located inside the tower 11. In some optional embodiments, the wind turbine generator set 10 includes a hanging beam (not shown) arranged in the tower 11, the hanging beam is connected to the inner wall of the tower 11, and the single-pendulum vibration reduction device 12 is connected to the hanging beam, thereby connected to the tower 11. The frequency of the single-pendulum vibration reduction device 12 can be equal to the natural frequency of the vibration of the tower 11, and the single-pendulum vibration reduction device 12 can resonate with the tower 11. When the tower 11 vibrates due to airflow, waves and other conditions, the single-pendulum vibration reduction device 12 can absorb the energy of the vibration of the tower 11, thereby suppressing the vibration of the tower 11, thereby improving the safety and reliability of the wind turbine generator set 10.

[0040] See also Figure 2 As shown, the present application provides a single pendulum vibration reduction device 12, including a mounting member 13, a pendulum 14, a conductor member 15 and a magnetic member 16. The pendulum 14 is swingably suspended on a structure 17 to be damped. It is understandable that the pendulum 14 can swing in any direction to achieve the function of suppressing the vibration of the structure 17 to be damped in any direction. In some embodiments, the single pendulum vibration reduction device 12 includes a suspension cable 18, which can be a steel wire rope, a steel cable or other components. One end of the suspension cable 18 is connected to the structure 17 to be damped, and the other end is connected to the pendulum 14, so that the pendulum 14 is swingably suspended on the structure 17 to be damped. The structure 17 to be damped can be a wind turbine, a ship, a heavy vibration machinery or other equipment with harmful vibrations. When the single pendulum vibration reduction device 12 is applied to a wind turbine, the structure 17 to be damped can be a tower of the wind turbine.

[0041] The conductor part 15 refers to a part made of a conductor, and the conductor refers to a material with low resistivity and easy to conduct current. Among them, the conductor can be made of copper, aluminum and other materials. The magnetic part 16 generally refers to a magnetic part, among which the magnetic part 16 can be a permanent magnet. When the conductor part 15 and the magnetic part 16 move relative to each other, eddy currents will be generated in the conductor part 15, and the eddy currents will generate an electromagnetic field that hinders the relative movement of the conductor part 15 and the magnetic part 16. The specific shapes of the conductor part 15 and the magnetic part 16 are not limited in this application, and the shapes of the conductor part 15 and the magnetic part 16 can be cylindrical, square, irregular, etc. One of the conductor part 15 and the magnetic part 16 is arranged on the mounting part 13, and the other is arranged on the pendulum 14. The pendulum 14 can move relative to the mounting part 13. It can be understood that the conductor part 15 can be arranged on the mounting part 13, and the magnetic part 16 can be arranged on the pendulum 14. It can also be that the conductor part 15 is arranged on the pendulum 14, and the magnetic part 16 is arranged on the mounting part 13. Among them, one of the conductor 15 and the magnetic member 16 provided on the pendulum 14 can be set to a block shape, and the other can be set to a plate shape, that is, the volume of one is larger than the volume of the other, so that when the pendulum 14 swings to any position, the distance between the magnetic member 16 and the conductor 15 can be relatively close, so as to achieve the effect of hindering the swing of the pendulum 14. When the pendulum 14 moves relative to the mounting member 13, the positions of the conductor 15 and the magnetic member 16 change relative to each other to generate a magnetic field to hinder the swing of the pendulum 14. It can be understood that when the structure 17 to be damped vibrates, the pendulum 14 will swing in the opposite direction of the vibration of the structure 17 to be damped under the action of inertia. At this time, the pendulum 14 will move relative to the mounting member 13, so that the positions of the conductor 15 and the magnetic member 16 change relative to each other, eddy currents are generated in the conductor 15, and an electromagnetic field is formed. The electromagnetic field can hinder the relative movement of the conductor 15 and the magnetic member 16, thereby hindering the swing of the pendulum 14. During the reciprocating swing of the pendulum 14, the energy will be gradually dissipated, so that the energy of the vibration of the structure to be damped 17 is gradually dissipated. Such a setting improves the damping ratio of the single pendulum vibration damping device 12, and can effectively consume the energy of the vibration of the structure to be damped 17, so that the vibration reduction effect is better. Compared with increasing the axial viscous damping, that is, increasing the damping ratio of the single pendulum vibration damping device 12 by adding oil, the present application has no risk of oil leakage, and has a simple structure, a large damping ratio, high reliability, and is easy to disassemble and maintain.

[0042] In some optional embodiments, the distance between the conductor part 15 and the magnetic part 16 in the vertical direction can range from 0.2 mm to 3 mm, so that the effect of dissipating the vibration energy of the structure to be damped 17 is better, so that the damping ratio of the single pendulum vibration reduction device 12 can reach between 4% and 8%.

[0043] In some optional embodiments, the mounting member 13 further includes a fixing frame 19. The fixing frame 19 may be in the shape of a column, a square, a railing, etc. The fixing frame 19 may be made of a steel plate. The pendulum 14, the conductor 15, and the magnetic member 16 may be arranged in the fixing frame 19, wherein the fixing frame 19 may play a protective role, so that the single pendulum vibration reduction device 12 is safer. The outer wall of the fixing frame 19 is connected to the structure to be damped 17. The contact impact force and damping force generated when the pendulum 14 swings may be transmitted to the structure to be damped 17 through the fixing frame 19. Optionally, the outer wall of the fixing frame 19 is connected to the structure to be damped 17 through a connecting plate 20. Compared with the fixing frame 19 being directly placed on the operating platform of the operator in the structure to be damped 17, such a setting can reduce the vibration sense of the operator when the pendulum 14 hits the fixing frame 19, so that the operator has a better experience.

[0044] In some optional embodiments, the single pendulum vibration reduction device 12 includes an elastic anti-collision structure 21, which is elastic, wherein the elastic anti-collision structure 21 can be made of materials such as rubber, elastic alloy, sponge, etc. The elastic anti-collision structure 21 is arranged below the pendulum 14 and on the swing path of the pendulum 14. Among them, the elastic anti-collision structure 21 can be arranged at the maximum swing position of the pendulum 14. The elastic anti-collision structure 21 can limit the swing of the pendulum 14, prevent the pendulum 14 from overswinging, and ensure the safety of the single pendulum vibration reduction device 12. At the same time, the elastic anti-collision structure 21 is elastic and can absorb part of the energy of the swing of the pendulum 14. Among them, the elastic anti-collision structure 21 can be arranged in the fixing frame 19.

[0045] In some optional embodiments, the pendulum 14 includes a pendulum 22, and the pendulum 22 includes a first end 23 and a second end 24 opposite to each other. It is understood that the first end 23 and the second end 24 can be arranged opposite to each other in the length direction of the pendulum 22. The pendulum 22 can be cylindrical and can be made of round steel or steel pipe. The first end 23 can be swung and suspended on the structure to be damped 17, one of the conductor 15 and the magnetic member 16 is arranged on the second end 24, and the other is arranged on the fixed frame 19. The other can be laid flat on the bottom surface of the fixed frame 19. One of the conductor 15 and the magnetic member 16 is arranged on the second end 24, so that the distance between the magnetic member 16 and the distance between the conductor 15 is closer, the effect of the magnetic member 16 and the conductor 15 is better, and the effect of hindering the swing of the pendulum 22 is better. It is understood that the first end 23 can be swung and suspended on the structure to be damped 17, the second end 24 is provided with the conductor 15, and the magnetic member 16 is arranged on the fixed frame 19. Alternatively, the first end 23 may be swingably suspended on the structure to be damped 17, the second end 24 may be provided with a magnetic member 16, and the conductor member 15 may be provided on a fixing frame 19. When the pendulum 14 swings, it drives the second end 24 of the pendulum 22 to swing relative to the fixing frame 19. It is understandable that when the structure to be damped 17 vibrates, the pendulum 14 may swing in the opposite direction of the vibration of the structure to be damped 17 under the action of the inertial force, and the swing of the pendulum 14 may drive the second end 24 of the pendulum 22 to swing relative to the fixing frame 19. At this time, the positions of the conductor member 15 and the magnetic member 16 change relative to each other, eddy currents are generated in the conductor member 15, and an electromagnetic field is formed, which may hinder the relative movement of the conductor member 15 and the magnetic member 16, thereby hindering the pendulum 22, and further hindering the swing of the pendulum 14.

[0046] See also Figure 2 As shown, in some optional embodiments, the swing rod 22 includes a slider 25. The slider 25 can be square, cylindrical, etc., and the present application does not limit it. The slider 25 is arranged at the second end 24. The slider 25 can be fixedly connected to the second end 24, or can be movably connected to the second end 24. One of the conductor 15 and the magnetic member 16 is arranged on the slider 25, and the other is arranged flatly on the bottom surface of the fixing frame 19. See Figure 3As shown, in this embodiment, the number of one of the conductor member 15 and the magnetic member 16 disposed on the slider 25 is multiple, and the shape of one of the conductor member 15 and the magnetic member 16 can be circular in a top view, and can be evenly distributed and embedded in the slider 25 along the circumference of the slider 25. Among them, the shape of one of the conductor member 15 and the magnetic member 16 can also be annular in a top view, and the center of the annular ring can coincide with the center of the slider 25. Optionally, one of the conductor member 15 and the magnetic member 16 is disposed on the side of the slider 25 close to the bottom surface of the fixing frame 19, so that the distance between the conductor member 15 and the magnetic member 16 is closer, and the effect of hindering the swing of the pendulum 14 is better. Among them, the slider 25 can slide against the surface of the other of the conductor member 15 and the magnetic member 16. When the slider 25 is in close contact with the surface of the other, there will be friction between the slider 25 and the other of the conductor member 15 and the magnetic member 16, and the friction can also hinder the swing of the pendulum 14, so that the effect of hindering the swing of the pendulum 14 is better. When the pendulum 14 swings, it drives the slider 25 to slide relative to the bottom surface of the fixed frame 19. When the pendulum 14 swings, it can drive the slider 25 set at the second end 24 of the pendulum 22 to slide relative to the bottom surface of the fixed frame 19, so that one of the conductor 15 or the magnetic part 16 set in the slider 25 will slide on the surface of the other, thereby generating eddy currents and forming a magnetic field to hinder the relative movement of the conductor 15 and the magnetic part 16, thereby hindering the swing of the pendulum 14. The swing of the pendulum 14 is affected by the gravity restoring force of the pendulum 14 itself, the magnetic resistance generated by the relative movement between the conductor 15 and the magnetic part 16, and the sliding friction between the slider 25 and the other of the conductor 15 and the magnetic part 16, and the swing amplitude will gradually decrease. The energy generated by the vibration of the structure 17 to be damped absorbed by the pendulum 14 is dissipated, thereby achieving the purpose of reducing the vibration of the structure 17 to be damped.

[0047] In some optional embodiments, the swing rod 22 includes a spherical end 26 disposed at the second end 24. It is understandable that the spherical end 26 and the slider 25 are both disposed at the second end 24, and the slider 25 is provided with a receiving groove 27, the bottom surface of the receiving groove 27 is an arc surface that matches the spherical end 26, and the spherical end 26 is movably disposed in the receiving groove 27, so that the slider 25 is movably connected to the second end 24, and the spherical end 26 can rotate in the receiving groove 27, ensuring that during the swinging process of the swing rod 22, the spherical end 26 can always be disposed in the receiving groove 27, that is, the second end 24 can always be connected to the slider 25. In this arrangement, when the swing rod 22 swings, the swing rod 22 can drive the slider 25 to move horizontally on the surface of the other of the conductor 15 and the magnetic member 16 through the cooperation between the spherical end 26 and the receiving groove 27, and while facilitating processing and manufacturing, such an arrangement makes the distance between the conductor 15 and the magnetic member 16 closer, and the effect of reducing the vibration of the structure 17 to be damped is better.

[0048] In some optional embodiments, one of the conductor 15 and the magnetic member 16 is disposed on the second end 24, and the other is disposed on the bottom surface of the fixing frame 19. The other of the conductor 15 and the magnetic member 16 can be laid flat on the bottom surface of the fixing frame 19, and the side thereof away from the pendulum 14 can be kept horizontally disposed on the bottom surface of the fixing frame 19. The side of the other of the conductor 15 and the magnetic member 16 close to the pendulum 14 is an arc-shaped surface bent along the swing direction of the pendulum 14. It can be understood that the side of the other of the conductor 15 and the magnetic member 16 close to the pendulum 14 is arc-shaped. The arc of the swing direction of the pendulum 14 can be the same as the arc of the arc surface of the other of the conductor 15 and the magnetic member 16. In this way, during the swing of the pendulum 14, the distance between the conductor 15 and the magnetic member 16 remains consistent, so that the generated eddy current is more stable, and the effect of reducing the vibration of the structure 17 to be damped is better.

[0049] See also Figures 3 to 5As shown, in some optional embodiments, the pendulum 14 includes a mass block 28 fixedly connected to the pendulum 22, and the mounting member 13 includes a sliding block 29 movably connected to the pendulum 22. Among them, the mass block 28 and the sliding block 29 can be cut and processed by steel plates. Optionally, the processed pendulum 22, the mass block 28, the fixing frame 19 and other parts can be subjected to anti-corrosion treatment, which can extend the service life of the single pendulum vibration reduction device 12. It can be understood that the fixed connection can mean that the mass block 28 can be stationary relative to the pendulum 22. Among them, the pendulum 22 and the mass block 28 can be fixedly connected by an interference fit. The movable connection can mean that the sliding block 29 can move relative to the pendulum 22. It can be understood that relative movement can occur between the mass block 28 and the sliding block 29. In some optional embodiments, the pendulum 22 can be inserted through the mass block 28 and the sliding block 29, and the mass block 28 and the sliding block 29 can be stacked along the length direction of the pendulum 22. It can be understood that the number of mass blocks 28 and sliding blocks 29 can be arbitrarily set and arranged according to actual needs. Among them, the mass block 28 can be set between two adjacent sliding blocks 29, or the sliding block 29 can be set between two adjacent mass blocks 28, or the mass block 28 and the sliding block 29 can be arranged in sequence, and this application does not limit it. In some optional embodiments, the single pendulum vibration reduction device 12 also includes at least two connecting members 30, at least two connecting members 30 are fixed to the two ends of the pendulum 22 along the length direction of the pendulum 22, the mass block 28 and the sliding block 29 are clamped between the at least two connecting members 30, and the connecting member 30 is used to lock the mass block 28 and the sliding block 29, and limit the mass block 28 and the sliding block 29 to the pendulum 22, thereby improving the safety of the pendulum 14. One of the conductor 15 and the magnetic member 16 is arranged on the sliding block 29, and the other is arranged on the mass block 28. It is understandable that the conductor 15 can be arranged on the sliding block 29, and the magnetic member 16 can be arranged on the mass block 28; or the magnetic member 16 can be arranged on the sliding block 29, and the conductor 15 can be arranged on the mass block 28. In some optional embodiments, the other of the conductor 15 and the magnetic member 16 is arranged on the side of the mass block 28 close to the sliding block 29. Such an arrangement makes the distance between the conductor 15 and the magnetic member 16 closer, which can more effectively hinder the swing of the pendulum 14, thereby reducing the vibration of the structure to be damped 17 better. When the pendulum 14 swings, it drives the sliding block 29 to slide relative to the mass block 28. When the pendulum 14 swings, the sliding block 29 movably connected to the pendulum rod 22 can move relative to the mass block 28 fixedly connected to the pendulum rod 22, wherein the conductor part 15 and the magnetic part 16 arranged on the sliding block 29 and the mass block 28 will move relative to each other, thereby generating eddy currents and forming an electromagnetic field. The formed electromagnetic field will in turn hinder the relative movement between the conductor part 15 and the magnetic part 16, thereby hindering the swing of the pendulum 14.In addition, when the pendulum 14 swings, the sliding block 29 moves relative to the swing rod 22, and there is friction between the sliding block 29 and the swing rod 22, which can also hinder the swing of the pendulum 14, so that the effect of hindering the swing of the pendulum 14 is better. Figure 5 As shown, in some optional embodiments, the mass block 28 is circular in shape, wherein the mass block 28 may be in the shape of a circular ring, and the pendulum rod 22 is inserted into the middle hole of the circular ring. The number of the other of the conductor member 15 and the magnetic member 16 is plural, and is evenly distributed along the radial direction of the mass block 28. Such an arrangement makes the magnetic resistance of the pendulum 14 in all directions more uniform when the pendulum 14 swings, and the effect of hindering the swing of the pendulum 14 is better, and the vibration reduction effect is more excellent.

[0050] See also Figure 6 As shown, in some optional embodiments, the sliding block 29 is provided with a sliding groove 31 that passes through the pendulum 22 in the longitudinal direction, and the pendulum 22 is slidably arranged in the sliding groove 31. The pendulum 22 can slide along the sliding groove 31, and the sliding block 29 can also rotate around the pendulum 22. In this way, the sliding block 29 can move relative to the pendulum 22 in a direction perpendicular to the longitudinal direction of the pendulum 22. The sliding groove 31 can limit the movement range of the sliding block 29 relative to the pendulum 22, ensuring that the distance between the conductor 15 and the magnetic member 16 is within a suitable range. One of the conductor 15 and the magnetic member 16 is arranged close to the edge of the sliding groove 31, which ensures that the distance between the conductor 15 and the magnetic member 16 is closer, making the overall structure more compact, and the volume of the sliding block 29 can be set smaller, so that the stability of the pendulum 14 is better.

[0051] In some optional embodiments, the pendulum 14 is disposed in the fixing frame 19, and in the direction perpendicular to the pendulum rod 22, the length of the sliding block 29 is greater than the length of the mass block 28. At this time, when the pendulum 14 swings, one end of the sliding block 29 will first abut against the inner wall of the fixing frame 19, and at this time, the pendulum rod 22 continues to swing, which will cause relative movement between the mass block 28 and the sliding block 29. Such a configuration makes the relative movement between the conductor 15 and the magnetic member 16 more obvious, and the effect of hindering the swing of the pendulum 14 is better.

[0052] The conductor 15 and the magnetic member 16 may be Figure 2 The embodiment shown in the figure can also be arranged as Figure 4 The embodiment shown in the figure can also be arranged as Figure 2 and Figure 4 The embodiments shown are configured in the same manner, and this application does not limit them.

[0053] Figure 7 Shown Figure 2 and Figure 4The structural diagram of the embodiments shown in FIG. Figure 7 As shown, in some optional embodiments, the conductor includes a first conductor 32 and a second conductor 33, and the magnetic member includes a first magnetic member 34 and a second magnetic member 35. Among them, one of the first conductor 32 and the first magnetic member 34 is arranged at the second end 24, and the other is arranged at the fixing frame 19. It can be understood that the first conductor 32 can be arranged at the second end 24, and the first magnetic member 34 can be arranged at the fixing frame 19. It can also be that the first magnetic member 34 is arranged at the second end 24, and the first conductor 32 is arranged at the fixing frame 19. One of the second conductor 33 and the second magnetic member 35 is arranged at the sliding block 29, and the other is arranged at the mass block 28. It can be understood that the second conductor 33 can be arranged at the sliding block 29, and the second magnetic member 35 can be arranged at the mass block 28. It can also be that the second magnetic member 35 is arranged at the sliding block 29, and the second conductor 33 is arranged at the mass block 28. When the pendulum 14 swings, it drives the second end 24 of the pendulum 22 to swing relative to the fixed frame 19, and drives the sliding block 29 to slide relative to the mass block 28. The damping force of the pendulum 14 comes from the first conductor 32 and the first magnetic member 34 arranged on the second end 24 and the fixed frame 19, and the second conductor 33 and the second magnetic member 35 arranged on the sliding block 29 and the mass block 28. In this way, the damping ratio of the single pendulum vibration reduction device 12 is larger and the vibration reduction effect is better. Figure 8 As shown, in some optional embodiments, the number of the sliding blocks 29 is at least two, and they are arranged along the length direction of the rocker 22, so that the vibration energy of the structure to be damped can be consumed more quickly and the vibration reduction effect is better.

[0054] In some optional embodiments, during the assembly process, the finished tower 11 can be first placed flat on the ground, and a fixing frame 19, a hanging beam and other structures can be installed on the tower 11. The pendulum 14 is then transported to the tower 11 through tooling, and placed in the fixing frame 19, temporarily bound firmly to limit the movement of the pendulum 14. The suspension cable 18 is then connected between the hanging beam and the pendulum 14. In this way, the tower 11 with the single pendulum vibration reduction device 12 installed is transported to the installation site of the wind turbine 10, and appropriate tooling needs to be configured to ensure that the inner wall of the tower 11 is not damaged. After arriving at the installation site of the wind turbine 10, the tower 11 needs to be hoisted for use.

[0055] In some other embodiments, the pendulum 14 may also be transported to the installation site of the wind turbine generator set 10 for installation, so that the upper platform or the pendulum 14 can be installed at the installation site of the wind turbine generator set 10, ensuring the safety of transportation of the tower 11.

[0056] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any variations, uses or adaptations of the present application, which follow the general principles of the present application and include common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present application are indicated by the following claims.

[0057] It should be understood that the present application is not limited to the precise structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present application is limited only by the appended claims.

Claims

1. A single pendulum vibration reduction device, characterized in that: include: Mounting parts; A pendulum, swingably suspended from the structure to be damped; and A conductor and a magnetic member, one of which is disposed on the mounting member, and the other is disposed on the pendulum; The pendulum can move relative to the mounting member; when the pendulum moves relative to the mounting member, the positions of the conductive member and the magnetic member change relative to each other to generate a magnetic field, so as to hinder the swing of the pendulum; The pendulum includes a pendulum rod and a mass block fixedly connected to the pendulum rod; the mounting member includes a sliding block movably connected to the pendulum rod; one of the conductor member and the magnetic member is arranged on the sliding block, and the other is arranged on the mass block; when the pendulum swings, the sliding block is driven to slide relative to the mass block; the other of the conductor member and the magnetic member is arranged on a side of the mass block close to the sliding block.

2. The single pendulum vibration reduction device according to claim 1, characterized in that: The mounting member includes a fixing frame; the swing rod includes a first end and a second end opposite to each other, the first end is swingably suspended on the structure to be damped, and when the pendulum swings, the second end of the swing rod is driven to swing relative to the fixing frame.

3. The single pendulum vibration reduction device according to claim 2, characterized in that: The swing rod includes a slider, and the slider is arranged at the second end; when the pendulum swings, the slider is driven to slide relative to the bottom surface of the fixing frame.

4. The single pendulum vibration reduction device according to claim 3, characterized in that: The swing rod includes a spherical end arranged at the second end; the slider is provided with a receiving groove, the bottom surface of the receiving groove is an arc surface matched with the spherical end, and the spherical end can be movably arranged in the receiving groove.

5. The single pendulum vibration reduction device according to claim 1, characterized in that: The mounting member further comprises a fixing frame, and the pendulum is arranged in the fixing frame; in a direction perpendicular to the pendulum rod, the length of the sliding block is greater than the length of the mass block; and / or The number of the sliding blocks is at least two, and the sliding blocks are arranged along the length direction of the swing rod.

6. The single pendulum vibration reduction device according to claim 1, characterized in that: The sliding block is provided with a sliding groove which passes through the vertical direction of the swing rod, and the swing rod is slidably arranged in the sliding groove; one of the conductor and the magnetic member is arranged near the edge of the sliding groove; and / or The mass block is circular in shape, and the other of the conductor member and the magnetic member is plural in number and evenly distributed along the radial direction of the mass block.

7. The single pendulum vibration reduction device according to claim 1, characterized in that: The mounting member includes a fixing frame and a sliding block movably connected to the swing rod; the conductor member includes a first conductor member and a second conductor member, and the magnetic member includes a first magnetic member and a second magnetic member; The swing rod comprises a first end and a second end opposite to each other, the first end is swingably suspended on the structure to be damped, one of the first conductor and the first magnetic member is arranged on the second end, and the other is arranged on the fixing frame; one of the second conductor and the second magnetic member is arranged on the sliding block, and the other is arranged on the mass block; When the pendulum swings, it drives the second end of the pendulum rod to swing relative to the fixing frame, and drives the sliding block to slide relative to the mass block.

8. A wind turbine generator set, characterized in that: It comprises a tower and a single-pendulum vibration reduction device as described in any one of claims 1 to 7, wherein the single-pendulum vibration reduction device is connected to the tower.

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