Rotary energy dissipation physical pendulum device for vibration control of fan tower drum

Abstract

The invention discloses a rotation energy dissipation physical pendulum device for fan tower vibration control, which comprises a physical pendulum arranged in a fan tower; the number of the rigid plates is two, the two sets of rigid plates are arranged at the top end and the middle position of the fan tower barrel correspondingly, and the top end of the physical pendulum is rotationally connected with the rigid plate located at the top end of the fan tower barrel through a rotating energy dissipation hinge; the top face of the sliding plate is arranged to be an arc face, and the circle center, corresponding to an arc, of the arc face is concentric with the rotating energy dissipation hinge. The rigid ball assembly is mounted at the bottom end of the physical pendulum, and the rigid ball assembly is in sliding fit with the cambered surface; and the vibration reduction assembly is arranged on the inner wall of the fan tower barrel and corresponds to the rigid ball assembly. The TMD can be installed at the corresponding height of the tower drum according to the performance requirement of the fan tower drum, the problem that construction is complex in limited space installation of a traditional TMD is solved, application is flexible, and the TMD is suitable for being used in various fan tower drums.

Description

Technical Field

[0001] The invention relates to the technical field of wind turbine vibration control, and in particular to a rotation energy dissipation physical pendulum device for wind turbine tower vibration control. Background Art

[0002] Due to the current increase in demand for electricity and the expectation for efficiency, modern wind turbines are built higher and higher to capture more energy. The wind turbine tower is the main supporting structure in the wind turbine generator set. It connects the wind turbine to the ground and provides the required height for the horizontal axis impeller. In addition to bearing the gravity of the unit itself, the tower also bears wind and seismic loads. The wind turbine tower is a tall structure with low inherent damping. When subjected to strong wind loads and seismic loads, it will produce excessive vibration response. The vibration response at the top of the wind turbine tower is the most unfavorable place. Therefore, it is necessary to take measures to reduce the vibration amplitude at the top of the wind turbine tower to improve its structural safety and extend its service life.

[0003] A conventional tuned mass damper (TMD) has a technical problem of complex construction when installed in a limited space. Based on this, the present invention provides a rotational energy dissipation physical pendulum device for wind turbine tower vibration control. Summary of the invention

[0004] The object of the present invention is to provide a rotational energy dissipation physical pendulum device for wind turbine tower vibration control to solve the problems existing in the prior art.

[0005] To achieve the above object, the present invention provides the following solution: The present invention provides a rotation energy dissipation physical pendulum device for wind turbine tower vibration control, comprising:

[0006] A physical pendulum, the physical pendulum being arranged in the wind turbine tower;

[0007] A rigid plate, wherein two groups of the rigid plates are provided, and the two groups of the rigid plates are respectively provided at the top and the middle of the wind turbine tower, and the top of the physical pendulum is rotatably connected to the rigid plate located at the top of the wind turbine tower through a rotating energy dissipation hinge;

[0008] A sliding plate, the sliding plate is fixed to the top surface of the rigid plate located in the middle of the wind turbine tower, the top surface of the sliding plate is set as an arc surface, and the center of the arc corresponding to the arc surface is concentric with the rotating energy dissipation hinge;

[0009] A rigid ball assembly, the rigid ball assembly being mounted at the bottom end of the physical pendulum, the rigid ball assembly being in sliding cooperation with the arc surface;

[0010] A vibration reduction assembly is arranged on the inner wall of the wind turbine tower and corresponds to the rigid ball assembly.

[0011] According to the rotational energy dissipation physical pendulum device for wind turbine tower vibration control provided by the present invention, the rotational energy dissipation hinge includes a rotational energy dissipation damper, and the rotational energy dissipation damper is fixed to the rigid plate located at the top of the wind turbine tower by high-strength bolts, and the top of the physical pendulum is fixed to the rotational energy dissipation damper.

[0012] According to the rotational energy dissipation physical pendulum device for wind turbine tower vibration control provided by the present invention, the rigid ball assembly includes a support and a ball, the support is fixed to the bottom end of the physical pendulum, the ball is rotatably connected to the support, and the ball is slidably fitted with the arc surface.

[0013] According to the rotational energy dissipation physical pendulum device for wind turbine tower vibration control provided by the present invention, the sliding plate and the rigid plate located in the middle of the wind turbine tower are fixedly connected by high-strength bolts.

[0014] According to the rotational energy dissipation physical pendulum device for wind turbine tower vibration control provided by the present invention, the cross-sectional shape of the physical pendulum is circular.

[0015] According to the rotational energy dissipation physical pendulum device for wind turbine tower vibration control provided by the present invention, the rigid plate is fixedly connected to the top of the wind turbine tower via a flange.

[0016] According to the rotational energy dissipation physical pendulum device for wind turbine tower vibration control provided by the present invention, the vibration reduction assembly includes a vibration reduction ring, the vibration reduction ring is fixed in the wind turbine tower, and the vibration reduction ring is made of high-performance vibration reduction material.

[0017] According to the rotational energy dissipation physical pendulum device for wind turbine tower vibration control provided by the present invention, the sliding plate is made of durable low-friction polytetrafluoroethylene material.

[0018] The present invention discloses the following technical effects:

[0019] The present invention overcomes the shortcomings of the traditional TMD installed in the limited space inside the wind turbine nacelle and the limited control effect. By utilizing the sufficient space within the top range of the tower top, the diameter and length of the physical pendulum can be flexibly adjusted to achieve a control design with a larger mass ratio, thereby improving the control effect and robust performance of the wind turbine tower vibration response.

[0020] The present invention can be installed at the corresponding height of the tower according to the performance requirements of the wind turbine tower, avoiding the complex construction problems existing in the installation of traditional TMD in limited space, and is flexible in application and suitable for use in various wind turbine towers. In addition, under the action of gravity, self-reset can be achieved without external energy input.

[0021] The present invention provides a rotational energy dissipation physical pendulum device for wind turbine tower vibration control, which can control the vibration response of the wind turbine under wind and earthquake loads and improve the safety performance of the structure. Under the action of wind and earthquake, the rotational energy dissipation physical pendulum device for wind turbine tower vibration control can be regarded as a structure-PTMD system, wherein the wind turbine tower is the structural part, and the physical pendulum and the rotational energy dissipation hinge constitute the PTMD system. By optimizing the design parameters of the rotational energy dissipation hinge, the wind turbine tower vibration caused by wind and earthquake can be reduced through rotational energy consumption, thereby protecting the safety of the wind turbine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a structural schematic diagram of a rotation energy dissipation physical pendulum device for wind turbine tower vibration control according to the present invention;

[0024] Figure 2 It is an overall schematic diagram of the rotation energy dissipation physical pendulum device for wind turbine tower vibration control of the present invention implemented on the top of the wind turbine tower;

[0025] Figure 3 It is a schematic diagram of a rotation energy dissipation hinge of a rotation energy dissipation physical pendulum device for wind turbine tower vibration control according to the present invention;

[0026] Figure 4 It is an axonometric view of the rolling ball device of the rotary energy dissipation physical pendulum device for wind turbine tower vibration control according to the present invention.

[0027] In the figure: 1. Wind turbine tower; 2. Physical pendulum; 3. Rigid plate; 4. Arc surface; 5. Vibration reduction ring; 6. Rotating energy dissipation hinge; 7. Rolling ball device. DETAILED DESCRIPTION

[0028] 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, not all of the embodiments. 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.

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] Reference Figure 1-Figure 4 The present invention provides a rotation energy dissipation physical pendulum device for wind turbine tower vibration control, comprising:

[0031] A physical pendulum 2, the physical pendulum 2 is arranged in the wind turbine tower 1;

[0032] Rigid plates 3, two groups of rigid plates 3 are provided, and the two groups of rigid plates 3 are respectively provided at the top and the middle position of the wind turbine tower 1, and the top of the physical pendulum 2 is rotatably connected with the rigid plate 3 located at the top of the wind turbine tower 1 through a rotating energy dissipation hinge 6;

[0033] A sliding plate, the sliding plate is fixed on the top surface of a rigid plate 3 located in the middle of the wind turbine tower 1, the top surface of the sliding plate is set as an arc surface 4, and the center of the arc corresponding to the arc surface 4 is concentric with the rotating energy dissipation hinge 6;

[0034] A rigid ball assembly is installed at the bottom end of the physical pendulum 2, and the rigid ball assembly is slidably matched with the arc surface 4;

[0035] The vibration reduction assembly is arranged on the inner wall of the wind turbine tower 1 and is arranged corresponding to the rigid ball assembly.

[0036] In this embodiment, a frosted belt may be provided on the arc surface 4, and the friction coefficient of the frosted belt increases successively along both sides, so that energy can be absorbed by friction.

[0037] Further optimizing the scheme, the rotating energy dissipation hinge 6 includes a rotating energy dissipation damper, which is fixed to the rigid plate 3 at the top of the wind turbine tower 1 by high-strength bolts, and the top of the physical pendulum 2 is fixed to the rotating energy dissipation damper. The specific model of the rotating energy dissipation damper is selected according to actual needs to realize rotational energy consumption and reduce the vibration of the wind turbine tower caused by wind and earthquake.

[0038] According to a further optimized solution, the rigid ball assembly includes a support and a ball. The support is fixed to the bottom end of the physical pendulum 2 , and the ball is rotatably connected to the support. The ball and the arc surface 4 are slidably matched.

[0039] According to a further optimized solution, the sliding plate is fixedly connected to the rigid plate 3 located in the middle of the wind turbine tower 1 by high-strength bolts.

[0040] In a further optimized solution, the cross-sectional shape of the physical pendulum 2 is circular. The diameter and length of the physical pendulum 2 can be adjusted according to the internal space size of the wind turbine tower 1 to meet the selection of different mass ratios between the physical pendulum 2 and the tower.

[0041] According to a further optimized solution, the rigid plate 3 is fixedly connected to the top of the wind turbine tower 1 via a flange.

[0042] According to a further optimization scheme, the vibration reduction assembly includes a vibration reduction ring 5, which is fixed in the wind turbine tower 1 and is made of a high-performance vibration reduction material. The high-performance vibration reduction material may include a high-damping rubber ring and a polyurethane ring.

[0043] To further optimize the solution, the sliding plate is made of durable, low-friction polytetrafluoroethylene material.

[0044] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0045] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A rotational energy dissipation physical pendulum device for wind turbine tower vibration control, characterized in that: include: A physical pendulum (2), wherein the physical pendulum (2) is arranged in the wind turbine tower (1); A rigid plate (3), wherein two groups of the rigid plates (3) are provided, and the two groups of the rigid plates (3) are respectively provided at the top and middle position of the wind turbine tower (1), and the top of the physical pendulum (2) is rotationally connected to the rigid plate (3) located at the top of the wind turbine tower (1) via a rotation energy dissipation hinge (6); A sliding plate, the sliding plate being fixed to the top surface of the rigid plate (3) located in the middle of the wind turbine tower (1), the top surface of the sliding plate being arranged as an arc surface (4), the center of the arc corresponding to the arc surface (4) being concentric with the rotating energy dissipation hinge (6); A rigid ball assembly, the rigid ball assembly being mounted at the bottom end of the physical pendulum (2), the rigid ball assembly being in sliding engagement with the arc surface (4); A vibration reduction assembly is arranged on the inner wall of the wind turbine tower (1) and is arranged corresponding to the rigid ball assembly.

2. A rotational energy dissipation physical pendulum device for wind turbine tower vibration control according to claim 1, characterized in that: The rotating energy dissipation hinge (6) comprises a rotating energy dissipation damper, which is fixed to the rigid plate (3) located at the top of the wind turbine tower (1) by high-strength bolts, and the top of the physical pendulum (2) is fixed to the rotating energy dissipation damper.

3. The rotational energy dissipation physical pendulum device for wind turbine tower vibration control according to claim 1, characterized in that: The rigid ball assembly comprises a support and a ball, wherein the support is fixed at the bottom end of the physical pendulum (2), the ball is rotatably connected to the support, and the ball is slidably engaged with the arc surface (4).

4. The rotational energy dissipation physical pendulum device for wind turbine tower vibration control according to claim 1, characterized in that: The sliding plate is fixedly connected to the rigid plate (3) located in the middle of the wind turbine tower (1) by high-strength bolts.

5. The rotational energy dissipation physical pendulum device for wind turbine tower vibration control according to claim 1, characterized in that: The cross-sectional shape of the physical pendulum (2) is circular.

6. The rotational energy dissipation physical pendulum device for wind turbine tower vibration control according to claim 1, characterized in that: The rigid plate (3) is fixedly connected to the top of the wind turbine tower (1) via a flange.

7. The rotational energy dissipation physical pendulum device for wind turbine tower vibration control according to claim 1, characterized in that: The vibration damping assembly comprises a vibration damping ring (5), the vibration damping ring (5) is fixed in the wind turbine tower (1), and the vibration damping ring (5) is made of high-performance vibration damping material.

8. The rotational energy dissipation physical pendulum device for wind turbine tower vibration control according to claim 1, characterized in that: The sliding plate is made of durable low-friction polytetrafluoroethylene.

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