Wind power tower drum device and vibration reduction and reinforcement method thereof

Abstract

The invention discloses a wind power tower drum device and a vibration reduction and reinforcement method thereof. The wind power tower drum device comprises a tower drum and a plurality of vibration reduction and reinforcement mechanisms. A plurality of longitudinal convex ribs are uniformly distributed on the inner wall of the tower drum, and a reinforcing plate and an elastic cushion layer are arranged between every two adjacent longitudinal convex ribs; each set of damping and reinforcing mechanism comprises a main connecting seat and two sets of servo elastic brackets; the main connecting seats are connected with the longitudinal convex ribs, and each reinforcing plate is supported by the two servo elastic supports in the two adjacent vibration reduction reinforcing mechanisms, so that the reinforcing plates tightly press the elastic cushion layer; the servo elastic support comprises a fixed sleeve, a sliding sleeve, an elastic buffer piece and an actuator. When the servo elastic support is in a buffering and damping state, the actuator is in a closed state, and the elastic buffering piece absorbs energy and is used for counteracting vibration of the tower drum. When the servo elastic support is in a reinforcing and supporting state, the actuator is in a working state and abuts against the sliding sleeve so as to improve the structural rigidity of the tower drum and reduce shaking.

Description

Technical Field

[0001] The present invention relates to the technical field of wind turbine towers, and in particular to a wind turbine tower device and a vibration reduction and reinforcement method thereof. Background Art

[0002] A wind turbine tower is the main structure of a wind turbine, with the fan blades mounted on top. Due to its high height, wind turbine towers require reinforcement and vibration-resistant treatment to meet reliability requirements.

[0003] In the prior art, a central column is generally installed at the center of a wind turbine tower, a reinforcement plate is welded to the inner surface of the wind turbine tower, and multiple sets of vibration absorbers are installed between the central column and the reinforcement plate. The multiple sets of vibration absorbers are arranged along the circumference of the central column.

[0004] The defects of the existing technology are that a central column needs to be configured, there are many installation steps, and the cost is high. In addition, a reinforcement plate needs to be welded to the inner surface of the wind turbine tower, which increases the installation steps. The wall of the wind turbine tower will also be damaged during welding. There is a rigid contact between the reinforcement plate and the wall of the wind turbine tower. When the vibration absorber performs vibration reduction work in an expansion and contraction manner, the force will be directly reacted to the wall of the wind turbine tower, which will also cause damage to the wall of the wind turbine tower.

[0005] In view of this, it is necessary to provide a new type of wind turbine tower device and a vibration reduction and reinforcement method thereof. Summary of the Invention

[0006] The purpose of the present invention is to provide a new type of wind turbine tower device and its vibration reduction and reinforcement method. The main connecting seat of the vibration reduction and reinforcement mechanism is installed on the longitudinal convex rib on the inner side of the tower, so there is no need to install a central column. The two sets of servo elastic brackets of the vibration reduction and reinforcement mechanism are arranged in a Y shape to be connected to the two reinforcing plates on the longitudinal convex rib. An elastic cushion layer is provided between each reinforcing plate and the tower. Each reinforcing plate is supported by two servo elastic brackets in two adjacent sets of vibration reduction and reinforcement mechanisms, so that the reinforcing plate presses the elastic cushion layer, thereby eliminating the need to weld the reinforcing plate to the tower, saving processes, and avoiding rigid contact between the reinforcing plate and the tower wall, thereby overcoming the shortcomings of the prior art.

[0007] The technical solution of the present invention provides a wind power tower device, comprising a tower and a plurality of vibration reduction and reinforcement mechanisms arranged in the tower and uniformly distributed along the circumference of the tower;

[0008] The inner wall of the tower is evenly distributed with a plurality of longitudinal ribs at intervals along the circumference, an arc-shaped reinforcement plate is arranged between every two adjacent longitudinal ribs, and an elastic cushion layer is arranged between each reinforcement plate and the tower;

[0009] Each set of the vibration reduction and reinforcement mechanism includes a main connecting seat fixedly connected to one of the longitudinal ribs and two sets of servo elastic brackets arranged on opposite sides of the main connecting seat and respectively hinged to the main connecting seat;

[0010] The two sets of servo elastic supports are respectively hinged to the two reinforcing plates on both sides of the longitudinal ribs, and each reinforcing plate is supported by two servo elastic supports in two adjacent sets of vibration reduction and reinforcement mechanisms, so that the reinforcing plates press the elastic cushion layer;

[0011] The servo elastic support includes a fixed sleeve, a sliding sleeve slidably connected to the fixed sleeve and hinged to the reinforcing plate, an elastic buffer connected between the fixed sleeve and the sliding sleeve, and an actuator provided in the fixed sleeve and used to eject the sliding sleeve;

[0012] When the servo elastic support is in a buffering and vibration reduction state, the actuator is in a closed state, and the elastic buffer absorbs energy and reduces vibration to offset the vibration of the tower;

[0013] When the servo elastic support is in the reinforced support state, the actuator is in the working state and supports the sliding sleeve to increase the structural rigidity of the tower and reduce shaking.

[0014] In one of the optional technical solutions, a pusher for driving the sliding sleeve to retract is provided in the fixed sleeve;

[0015] When the pusher is in the initial state, the push rod of the pusher is in the retracted state and separated from the sliding sleeve. When the servo elastic bracket is in the buffering and vibration reduction state and the reinforcement and support state, the pusher is in the initial state.

[0016] When the pusher is in a working state, the push rod is in an extended state and pushes the sliding sleeve to retract, so that the reinforcing plate moves toward the inner side of the wall of the tower to reduce the structural stiffness and vibration frequency of the tower.

[0017] In one of the optional technical solutions, a vibration sensor is provided in one end of the sliding sleeve facing the reinforcing plate;

[0018] And / or, a first displacement sensor for monitoring the displacement of the sliding sleeve is provided on the inner side or the outer side of the fixed sleeve.

[0019] In one of the optional technical solutions, one end of the sliding sleeve located in the fixed sleeve is connected to a pressure-bearing sliding plate, and the pressure-bearing sliding plate is slidably connected to the wall of the fixed sleeve;

[0020] The elastic buffer is connected between the pressure-bearing sliding plate and the top cover of the fixed sleeve;

[0021] The actuator and the sliding sleeve are located on opposite sides of the pressure-bearing sliding plate, and the actuator can lift the pressure-bearing sliding plate.

[0022] In one of the optional technical solutions, a limiting ring is provided in the fixing sleeve, and the limiting ring is located between the pressure-bearing sliding plate and the top cover;

[0023] When the sliding sleeve is extended to the maximum distance, the pressure-bearing sliding plate is blocked by the limiting ring.

[0024] In one of the optional technical solutions, the actuator includes a telescopic end extending toward the pressure-bearing sliding plate and a driving portion for driving the telescopic end to telescope or slide;

[0025] A pressure sensor is provided in the end surface of the telescopic end facing the pressure-bearing sliding plate and / or in the bottom surface of the pressure-bearing sliding plate facing the telescopic end.

[0026] In one of the optional technical solutions, a second displacement sensor for monitoring the displacement of the telescopic end is provided in the fixed sleeve.

[0027] The technical solution of the present invention also provides a vibration reduction and reinforcement method for a wind turbine tower device, comprising the following steps:

[0028] S01: monitoring the vibration and shaking state of the tower;

[0029] S02: If the sway amplitude of the tower is within the sway warning value, the actuator remains closed, the servo elastic support is in a buffering and vibration reduction state, and the elastic buffer absorbs energy and reduces vibration to offset the vibration of the tower;

[0030] If the shaking amplitude of the tower exceeds the shaking warning value, the actuator is in a working state and supports the sliding sleeve, and the servo elastic support is in a reinforced support state to increase the structural rigidity of the tower and reduce shaking.

[0031] In one of the optional technical solutions, the vibration reduction and reinforcement method for a wind turbine tower device further includes the following steps:

[0032] The actuator is in a working state and supports the sliding sleeve, and the servo elastic bracket is in a reinforced support state to improve the structural stiffness and vibration frequency of the tower to avoid the vibration frequency generated by the wind wheel.

[0033] In one of the optional technical solutions, the vibration reduction and reinforcement method of the wind turbine tower device includes the following steps:

[0034] The actuator is in an initial state, the pusher in the fixed sleeve is in a working state and pushes the sliding sleeve to retract, so that the reinforcing plate moves toward the inner side of the wall of the tower to reduce the structural stiffness and vibration frequency of the tower to avoid the vibration frequency generated by the wind wheel.

[0035] The above technical solution has the following beneficial effects:

[0036] The wind turbine tower device and its vibration reduction and reinforcement method provided by the present invention include a plurality of longitudinal ribs on the inner surface of the tower, an arcuate reinforcement plate disposed between each two longitudinal ribs, and an elastic cushion layer disposed between the reinforcement plate and the inner surface of the tower. The main connecting seat of the vibration reduction and reinforcement mechanism is mounted on the longitudinal ribs on the inner side of the tower, eliminating the need for a central column. The vibration reduction and reinforcement mechanism has two sets of servo elastic brackets arranged in a Y-shape to connect to the two reinforcement plates located on the longitudinal ribs. Each reinforcement plate is supported by two servo elastic brackets from two adjacent sets of vibration reduction and reinforcement mechanisms, eliminating the need for welding the reinforcement plates to the tower, saving steps. The two servo elastic brackets press the reinforcement plates against the elastic cushion layer, preventing rigid contact between the reinforcement plates and the tower wall.

[0037] The servo-elastic support comprises a fixed sleeve, a sliding sleeve, an elastic buffer, and an actuator. The sliding sleeve can extend relative to the fixed sleeve and is hingedly connected to the reinforcement plate. The elastic buffer is connected between the fixed and sliding sleeves to provide vibration damping. The actuator is used to lift the sliding sleeve when there is severe shaking, keeping it extended to support the reinforcement plate, thereby increasing the structural rigidity of the tower, reducing shaking, and improving the tower's reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The disclosure of the present invention will become more easily understood with reference to the accompanying drawings. It should be understood that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings:

[0039] Figure 1 A three-dimensional diagram of a wind turbine tower device provided by one embodiment of the present invention;

[0040] Figure 2 for Figure 1 A partial enlarged view of

[0041] Figure 3 A transverse cross-sectional view of a wind turbine tower device provided by one embodiment of the present invention;

[0042] Figure 4 for Figure 3 Cross-sectional view along AA direction;

[0043] Figure 5 for Figure 4A partial enlarged view of

[0044] Figure 6 is a cross-sectional view of the servo-elastic support, wherein the actuator and the pusher are both in an initial state;

[0045] Figure 7 is a cross-sectional view of the servo elastic support, wherein the pusher is in an initial state, and the telescopic end of the actuator extends along arrow A to push the pressure-bearing sliding plate;

[0046] Figure 8 2 is a cross-sectional view of the servo elastic support, wherein the pusher is in an initial state and the sliding sleeve is pushed by the actuator to extend along arrow B;

[0047] Figure 9 is a cross-sectional view of the servo elastic support, wherein the actuator is in an initial state, and the sliding sleeve is pushed by the pusher to retract along the arrow C;

[0048] Figure 10 This is the Campbell diagram of the tower frequency. DETAILED DESCRIPTION

[0049] The following further describes specific embodiments of the present invention with reference to the accompanying drawings. Like components are denoted by like reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, and the terms "inward" and "outward" refer to directions toward or away from the geometric center of a particular component, respectively.

[0050] like Figure 1-8 As shown, a wind turbine tower device provided by one embodiment of the present invention includes a tower 1 and a plurality of vibration reduction and reinforcement mechanisms 2 arranged in the tower 1 and evenly distributed along the circumference of the tower 1 .

[0051] The inner wall of the tower 1 is evenly spaced along the circumference with a plurality of longitudinal ribs 11 . An arc-shaped reinforcement plate 3 is arranged between every two adjacent longitudinal ribs 11 . An elastic cushion layer 4 is arranged between each reinforcement plate 3 and the tower 1 .

[0052] Each set of vibration reduction and reinforcement mechanisms 2 includes a main connecting seat 21 fixedly connected to a longitudinal rib 11 and two sets of servo elastic brackets 22 arranged on opposite sides of the main connecting seat 21 and respectively hinged to the main connecting seat 21.

[0053] The two sets of servo elastic supports 22 are respectively hinged to the two reinforcing plates 3 on both sides of the longitudinal convex rib 11 . Each reinforcing plate 3 is supported by two servo elastic supports 22 in two adjacent sets of vibration damping and reinforcement mechanisms 2 , so that the reinforcing plates 3 press the elastic cushion layer 4 .

[0054] The servo elastic bracket 22 includes a fixed sleeve 221, a sliding sleeve 222 slidably connected to the fixed sleeve 221 and hinged to the reinforcing plate 3, an elastic buffer 223 connected between the fixed sleeve 221 and the sliding sleeve 222, and an actuator 224 provided in the fixed sleeve 221 and used to eject the sliding sleeve 222.

[0055] When the servo elastic support 22 is in the buffering and vibration reduction state, the actuator 224 is in the closed state, and the elastic buffer 223 absorbs energy and reduces vibration to offset the vibration of the tower 1.

[0056] When the servo elastic support 22 is in the reinforced support state, the actuator 224 is in the working state and presses against the sliding sleeve 222 to increase the structural rigidity of the tower 1 and reduce shaking.

[0057] The wind power tower device provided by the present invention includes a tower 1, multiple sets of vibration reduction and reinforcement mechanisms 2, multiple reinforcement plates 3 and multiple elastic cushion layers 4.

[0058] The inner surface of the tower 1 is provided with a plurality of longitudinal ribs 11 at intervals. The longitudinal ribs 11 extend axially along the tower 1 and are evenly distributed along the circumference of the tower 1. The longitudinal ribs 11 are preferably integrally formed with the wall of the tower 1. A groove is defined between adjacent longitudinal ribs 11 for mounting the elastic pad 4 and the reinforcement plate 3.

[0059] The number of vibration-damping reinforcement mechanisms 2, reinforcement plates 3, and elastic pads 4 is the same as the number of longitudinal ribs 11. For example, if three longitudinal ribs 11 are spaced apart on the inner surface of a tower 1, the wind turbine tower assembly includes three sets of vibration-damping reinforcement mechanisms 2, three reinforcement plates 3, and three elastic pads 4.

[0060] The reinforcement plate 3 and elastic pad 4 are each arc-shaped. The reinforcement plate 3 is preferably a steel plate, and the elastic pad 4 is preferably a rubber pad. The elastic pad 4 is bonded to the outer surface of the reinforcement plate 3 to form a reinforcement plate-elastic pad combination. During assembly, the reinforcement plate-elastic pad combination is placed in the groove between every two adjacent longitudinal ribs 11, with the elastic pad 4 sandwiched between the reinforcement plate 3 and the wall of the tower 1.

[0061] The vibration reduction and reinforcement mechanism 2 can play both a vibration reduction and a reinforcement role, and includes a main connecting seat 21 and two sets of servo elastic brackets 22. The main connecting seat 21 is fixedly connected to the longitudinal convex rib 11, for example, by welding. The two sets of servo elastic brackets 22 are arranged on opposite sides of the main connecting seat 21 in a fork-shaped structure or a Y-shaped structure. The head ends of the two sets of servo elastic brackets 22 are respectively hinged to the main connecting seat 21, and the tail ends of the two sets of servo elastic brackets 22 are respectively hinged to the two reinforcing plates 3 on both sides of the longitudinal convex rib 11. Thus, each reinforcing plate 3 is supported by two servo elastic brackets 22 in two adjacent sets of vibration reduction and reinforcement mechanisms 2, so that the reinforcing plate 3 can press the elastic cushion layer 4, and finally the elastic cushion layer 4 is pressed against the inner surface of the tower 1.

[0062] The servo elastic support 22 can provide a buffering and vibration reduction effect by means of telescoping, and can also provide a reinforcement effect by means of fixed support.

[0063] The main connecting seat 21 of each set of vibration-damping reinforcement mechanisms 2 is fixedly mounted on a longitudinal rib 11, and the multiple main connecting seats 21 of multiple sets of vibration-damping reinforcement mechanisms 2 are respectively mounted on multiple longitudinal ribs 11 in a one-to-one correspondence. The two sets of servo elastic brackets 22 of each set of vibration-damping reinforcement mechanisms 2 are respectively hinged to the two reinforcement plates 3 on both sides, thereby achieving that each of the multiple reinforcement plates 3 is supported by a set of servo elastic brackets 22 of an adjacent vibration-damping reinforcement mechanism 2. The servo elastic brackets 22 are in an extended state in normal operation, so that the two sets of servo elastic brackets 22 support the reinforcement plates 3 and apply pressure to the reinforcement plates 3, so that the elastic pads 4 are pressed against the inner surface of the tower 1. When the tower 1 vibrates, the compressed elastic pads 4 also provide a certain buffering and vibration reduction effect, and can also avoid rigid contact and friction between the reinforcement plates 3 and the wall of the tower 1.

[0064] The servo elastic support 22 includes a fixed sleeve 221 , a sliding sleeve 222 , an elastic buffer 223 and an actuator 224 .

[0065] One end of the sliding sleeve 222 is slidably mounted within the fixed sleeve 221, while the other end extends outside the fixed sleeve 221 and is hingedly connected to a reinforcing plate 3. The elastic buffer 223, which can be a spring, is mounted between the fixed sleeve 221 and the sliding sleeve 222, providing a certain elastic driving force for the sliding sleeve 222 to extend outward. This ensures that when the servo elastic support 22 is in the initial state, the sliding sleeve 222 is in the extended state. In this way, when the tower 1 vibrates, the sliding sleeve 222 can adaptively generate a certain amount of telescopic movement. When the sliding sleeve 222 extends and contracts, it reacts with the elastic buffer 223, which absorbs energy and provides a buffering effect to offset the vibration of the tower 1.

[0066] The actuator 224 is arranged in the fixed sleeve 221, which adopts an electrically controlled or hydraulically controlled telescopic mechanism to push out the sliding sleeve 222 when the tower 1 shakes, and try to prevent it from retracting, thereby improving the supporting effect, increasing the rigidity of the connection structure, and then increasing the structural rigidity of the wall of the tower 1 to reduce shaking.

[0067] Specifically, since the vibration-damping reinforcement mechanism 2 is connected between the longitudinal rib 11 of the tower 1 and the reinforcing plate 3 on the inner side of the tower 1, when the actuator 224 works, it pushes out the sliding sleeve 222 so that it no longer retracts, thereby improving the structural stability between the longitudinal rib 11 and the reinforcing plate 3. The longitudinal rib 11 and the reinforcing plate 3 act on the wall of the tower 1 respectively, ultimately improving the structural stiffness of the wall of the tower 1 and reducing shaking.

[0068] As needed, multiple inclination sensors or distance sensors can be arranged at intervals on the circumference of the tower 1. When the maximum inclination angle or maximum shaking distance of the tower 1 is monitored to exceed the preset safety value when shaking, it means that the shaking amplitude of the tower 1 exceeds the shaking warning value. At this time, the actuator 224 starts to work and supports the sliding sleeve 222, and the servo elastic bracket 22 is in a reinforced support state to increase the structural stiffness of the tower 1 and reduce shaking.

[0069] If the height of tower 1 is L, the maximum horizontal shaking distance is △L, the elastic modulus of the tower steel plate is E, σ is the yield strength of the tower steel plate material, σ 0.2 It is a correction for the yield limit of materials with different plate thicknesses, and is calculated using the stress-strain relationship:

[0070]

[0071] Of course, as needed, a set of control devices, such as a controller, a chip, a computer, etc., can be configured outside or inside the tower 1 to receive signals from various sensors and control the switching of the actuator 224.

[0072] The vibration reduction and reinforcement methods for wind turbine tower devices are roughly as follows:

[0073] The first step is to monitor the vibration and shaking status of tower 1.

[0074] In the second step, if the shaking amplitude of the tower 1 is within the shaking warning value, the tower 1 vibrates at this time, the actuator 224 remains closed, the servo elastic bracket 22 is in a buffering and vibration reduction state, and the sliding sleeve 222 will adaptively expand and contract with the vibration. The expanded and contracted sliding sleeve 222 reacts to the elastic buffer 223, and the elastic buffer 223 absorbs energy and reduces vibration to offset the vibration of the tower 1.

[0075] If the sway amplitude of the tower 1 exceeds the sway warning value, the actuator 224 is activated, and the actuator 224 presses against the sliding sleeve 222, preventing the sliding sleeve 222 from retracting as much as possible. The servo elastic support 22 is in a reinforced support state, thereby increasing the structural rigidity of the tower 1 and reducing sway. In summary, the wind turbine tower device provided by the present invention has a plurality of longitudinal ribs 11 provided on the inner surface of the tower 1, an arc-shaped reinforcement plate 3 is provided between every two longitudinal ribs 11, and an elastic cushion layer 4 is provided between the reinforcement plate 3 and the inner surface of the tower 1. The main connecting seat 21 of the vibration reduction and reinforcement mechanism 2 is installed on the longitudinal convex rib 11 on the inner side of the tower 1, so there is no need to install a central column. The two sets of servo elastic brackets 22 of the vibration reduction and reinforcement mechanism 2 are arranged in a Y shape to connect with the two reinforcing plates 3 on the longitudinal convex rib 11. Each reinforcing plate 3 is supported by two servo elastic brackets 22 in two adjacent sets of vibration reduction and reinforcement mechanisms 2, so there is no need to weld the reinforcing plate 3 to the tower 1, saving processes. Due to the action of the two servo elastic brackets 22, the reinforcing plate 3 is pressed against the elastic cushion layer 4, which can avoid rigid contact between the reinforcing plate 3 and the wall of the tower 1.

[0076] The servo elastic support 22 comprises a fixed sleeve 221, a sliding sleeve 222, an elastic buffer 223, and an actuator 224. The sliding sleeve 222 can extend relative to the fixed sleeve 221 and is hingedly connected to the reinforcement plate 3. The elastic buffer 223 is connected between the fixed sleeve 221 and the sliding sleeve 222 to provide a vibration dampening effect. The actuator 224 is used to lift the sliding sleeve 222 in the event of severe shaking, keeping it extended to support the reinforcement plate 3. This improves the structural rigidity of the tower 1, reduces shaking, and enhances the reliability of the tower 1.

[0077] A wind rotor with one or more blades is mounted on tower 1. The rotation of the wind rotor generates vibrations that are transmitted to tower 1. The vibration frequency of the wind rotor varies depending on the number of blades. Generally, the vibration frequency generated by a single blade when the wind rotor rotates is called a low-order frequency and is denoted by 1P. The vibration frequency generated by a wind rotor with multiple blades is called a high-order frequency and is denoted by nP, where n is a natural number greater than or equal to 2, and is generally 2 or 3.

[0078] The frequency generated by the rotation of the wind wheel is also related to its rotation speed. The higher the rotation speed, the higher the vibration frequency generated, and the lower the rotation speed, the lower the vibration frequency generated.

[0079] The frequency generated by the rotation of the wind wheel can be obtained by a vibration sensor arranged on the wind wheel.

[0080] Figure 10The figure is a Campbell diagram of tower frequency, where 1P is the low-order frequency, 3P is the high-order frequency, the cut-in speed refers to the speed of the wind rotor that reaches the minimum speed when the generator is generating electricity, and the rated speed refers to the speed at which the fan blades reach the specified speed. The natural frequency movement range of the steel tower refers to the range of the tower 1's own vibration frequency. The upper and lower lines of the natural frequency movement range of the steel tower represent the approximate range that can resonate with the tower 1. If the frequency of the wind rotor is within this range, the probability of resonance of the tower 1 is high, and it is best to avoid this range. Therefore, the above range can be called the resonant frequency range or the frequency avoidance range, and Figure 10 The resonance frequency range or frequency avoidance range below is called the low resonance frequency range. Figure 10 The upper resonance frequency range or frequency avoidance range shown is referred to as a high resonance frequency range.

[0081] When the vibration of the wind rotor on the tower 1 is outside the resonance frequency range or the frequency avoidance range, the elastic buffer 223 of the vibration reduction and reinforcement mechanism 2 is mainly used to absorb energy and achieve buffering.

[0082] When the vibration generated by the wind rotor on the tower 1 is within or close to the resonant frequency range or the frequency avoidance range, it is necessary to change the rigidity or stiffness of the tower 1 to change the vibration frequency of the tower 1 so as to avoid the vibration frequency of the wind rotor and thus avoid resonance.

[0083] There are two ways to change the rigidity or stiffness of the tower 1 to avoid high resonant frequency ranges and low resonant frequency ranges:

[0084] If the vibration frequency of the wind wheel is a low-order frequency, for example, Figure 10 As shown by line 1P in the diagram, the frequency of the initial low-order frequency segment is lower than the vibration frequency of tower 1. At the final low-order frequency segment, the frequency reaches the low-resonance frequency range and the natural vibration frequency of tower 1. Therefore, the rigidity or stiffness of tower 1 does not need to be changed during the initial and intermediate segments of the rotor rotation. When the final low-order frequency segment gradually increases and approaches the low-resonance frequency range, the rigidity or stiffness of tower 1 is increased to increase the vibration frequency of tower 1 and raise the lower limit of the low-resonance frequency range, thereby avoiding the final low-order frequency segment.

[0085] If the vibration frequency of the wind wheel is a high-order frequency, for example, Figure 10 As shown by line 3P in the diagram, the initial high-order frequency coincides with the vibration frequency of tower 1, then gradually exceeds the high-resonance frequency range. Therefore, at the beginning of the rotor rotation, the rigidity or stiffness of tower 1 needs to be weakened to reduce the vibration frequency of tower 1 and avoid the initial high-order frequency. Once the high-order frequency exceeds the high-resonance frequency range, the rigidity or stiffness of tower 1 is restored.

[0086] For example: Assuming the generator cut-in speed is 1200r / min, the rated speed is 1800r / min, and the gearbox speed ratio is 200, the calculated 1P cut-in speed frequency is 0.1Hz, 1P rated speed frequency is 0.15Hz, 3P cut-in speed frequency is 0.3Hz, and 3P rated speed frequency is 0.45Hz. In order to avoid the resonant frequency range, the allowable frequency range of tower 1 should be 0.167Hz-0.272Hz.

[0087] For example, the vibration frequency generated by the wind rotor is a low-order frequency, so when the wind rotor speed is low, its vibration frequency is low, far below the low resonance frequency range; when the wind rotor speed is high, it may gradually approach or exceed the low resonance frequency range. At this time, the frequency of the tower 1 can be increased by increasing the rigidity or stiffness of the tower 1.

[0088] For example, if the vibration frequency generated by the wind rotor is a high-order frequency, when the wind rotor speed is low, its vibration frequency is also relatively low, lower than the high resonance frequency range, but within the natural frequency range of the tower 1 itself. At this time, the frequency of the tower 1 can be reduced by reducing the rigidity or stiffness of the tower 1, thereby reducing the upper limit value of the high resonance frequency range.

[0089] Lowering the upper limit of the high resonant frequency range has the following two effects:

[0090] The first one is to make the upper limit of the high resonance frequency range lower than the vibration frequency generated by the wind wheel, so as to completely avoid the high resonance frequency range.

[0091] The second type is that even if the upper limit value of the high resonance frequency range is still higher than the vibration frequency generated by the wind wheel in the initial stage, since the upper limit value of the high resonance frequency range has been reduced and the wind wheel gradually increases its speed, its vibration frequency will increase, so that the vibration frequency generated by the wind wheel can quickly exceed the high resonance frequency range, shortening the time when resonance may occur.

[0092] In one embodiment, if it is detected that the vibration frequency generated by the rotation of the wind rotor is lower than the vibration frequency (natural frequency) of the tower 1 itself and is close to the low resonance frequency range, the actuator 224 is used to increase the structural stiffness and vibration frequency of the tower 1.

[0093] Specifically, actuator 224 is in operation and supports sliding sleeve 222, while servo-elastic support 22 is in a reinforced support state. This increases the structural rigidity and vibration frequency of tower 1, thereby avoiding the vibration frequency generated by the wind rotor. This state is a resonance-avoiding and reinforced support state within the reinforced support state of servo-elastic support 22.

[0094] In one embodiment, Figure 6-9 As shown, a pusher 225 for driving the sliding sleeve 222 to retract is provided in the fixed sleeve 221 .

[0095] When the pusher 225 is in the initial state, the push rod 2252 of the pusher 225 is in the retracted state and separated from the sliding sleeve 222. When the servo elastic bracket 22 is in the buffering and vibration reduction state and the reinforcement support state, the pusher 225 is in the initial state.

[0096] When the pusher 225 is in operation, the push rod 2252 is extended and pushes the sliding sleeve 222 to retract, so that the reinforcing plate 3 moves toward the inner side of the wall of the tower 1 to reduce the structural stiffness and vibration frequency of the tower 1 .

[0097] The pusher 225 provided in this embodiment pushes the sliding sleeve 222 to retract, thereby driving the reinforcing plate 3 to move a certain distance toward the inner side of the wall of the tower 1, thereby reducing the structural stiffness of the tower 1 and further reducing the vibration frequency of the tower 1.

[0098] The pusher 225 may be a hydraulic push rod, a piston or the like, and includes a cylinder 2251 and a push rod 2252 slidably connected to the cylinder 2251 .

[0099] The pusher 225 is disposed in the fixed sleeve 221. The cylinder 2251 can be fixedly connected to the wall of the sliding sleeve 222 or to the top cover 2211 of the fixed sleeve 221. One end of the push rod 2252 is slidably connected to the cylinder 2251, and the other end faces deep inside or below the fixed sleeve 221. The push rod 2252 is arranged roughly parallel to the sliding sleeve 222. A boss or a convex ring can be provided around the sliding sleeve 222 so that the extended push rod 2252 can press on the boss or convex ring, thereby driving the sliding sleeve 222 along the Figure 9 The arrow C shown is retracted a distance.

[0100] When the pusher 225 is in a normal or initial state, the push rod 2252 is in a retracted state, and it leaves the boss or convex ring of the sliding sleeve 222 and does not hinder the free extension and contraction of the sliding sleeve 222.

[0101] When the servo elastic support 22 is in the buffering and vibration reduction state or the reinforcement support state, the pusher 225 is in the initial state. The reinforcement support state includes increasing the structural rigidity of the tower 1 to prevent the tower 1 from shaking, and also includes increasing the structural rigidity of the tower 1 to prevent resonance.

[0102] When it is necessary to reduce the structural stiffness or rigidity of the tower 1 in order to lower its vibration frequency, the pusher 225 is used to achieve this.

[0103] If it is monitored that the vibration frequency generated by the rotation of the wind rotor is equal to or higher than the vibration frequency (natural frequency) of the tower 1 itself, or the vibration frequency generated by the rotation of the wind rotor is slightly lower than the high resonance frequency range or is within the high resonance frequency range, the pusher 225 is used to reduce the structural stiffness and vibration frequency of the tower 1.

[0104] Specifically, at this time, the actuator 224 is in the initial state and will not hinder the retraction of the sliding sleeve 222. The pusher 225 is in the working state, and its push rod 2252 extends and pushes the sliding sleeve 222 to retract a certain distance. Since the reinforcing plate 3 is supported by a number of sliding sleeves 222 and is not fixedly connected to the wall of the tower 1, the retracted sliding sleeve 222 will drive the reinforcing plate 3 to leave the inner surface of the wall of the tower 1 by a certain distance. This distance can be controlled between a few millimeters and a few centimeters, so that the elastic cushion 4 leaves the inner surface of the wall of the tower 1. At this time, the reinforcing plate 3 no longer supports the wall of the tower 1, so the structural stiffness or rigidity of the tower 1 will be reduced accordingly, thereby reducing the vibration frequency of the tower 1 to avoid the vibration frequency generated by the wind wheel as much as possible. What is referred to here is lowering the vibration frequency of the tower 1 to avoid the vibration frequency generated by the wind wheel as much as possible, which means lowering the upper limit of the high resonance frequency range by lowering the vibration frequency of the tower 1. The effects are the two effects mentioned above. One is that it can be completely avoided, and the other is that although it cannot be completely avoided, the resonance time can be shortened.

[0105] In one embodiment, Figure 6-9 As shown, a vibration sensor 226 is provided within the end of the sliding sleeve 222 facing the reinforcing plate 3 to monitor the vibration of the tower 1 wall. When the tower 1 wall vibrates, the vibration is transmitted to the sliding sleeve 222 through the elastic cushion 4 and the reinforcing plate 3, and is then detected by the vibration sensor 226. The monitored vibration data is transmitted back to the control device to allow the user to understand the vibration status of the tower 1. Based on the vibration data, the severity of the current vibration amplitude is determined, and the ability of the servo elastic support 222 to provide a vibration damping effect is estimated. Other necessary measures, such as whether it is necessary to prevent resonance between the tower 1 and the wind rotor, are also estimated.

[0106] In one embodiment, Figure 6-9 As shown, a first displacement sensor 227 is provided on the inner or outer side of the fixed sleeve 221 to monitor the displacement of the sliding sleeve 222. The data monitored by the first displacement sensor 227 is transmitted back to the control device to allow the user to understand the expansion and contraction range of the sliding sleeve 222, which helps to determine the vibration amplitude or vibration state of the tower 1. If the expansion and contraction range of the sliding sleeve 222 is large and the time is long, it means that the vibration amplitude of the tower 1 is large and the frequency is low. If the expansion and contraction range of the sliding sleeve 222 is small and the time is short, it means that the vibration amplitude of the tower 1 is small and the frequency is high.

[0107] In one embodiment, Figure 4 As shown, along the axial direction of the tower 1 , multiple sets of vibration reduction and reinforcement mechanisms 2 are spaced apart inside the tower 1 , which reduce vibration and reinforce the tower 1 from different positions in the vertical direction, further improving the reliability of the tower 1 .

[0108] In one embodiment, Figure 3 As shown, the end of each sliding sleeve 222 is hinged with a secondary connecting seat 23 , and the secondary connecting seat 23 is fixedly connected to the reinforcing plate 3 .

[0109] In this embodiment, a secondary connecting seat 23 is provided at the end of each sliding sleeve 222, and the secondary connecting seat 23 is hinged to the end of the sliding sleeve 222. During assembly, the secondary connecting seat 23 is fixed to a designated position of the reinforcing plate 3, such as by welding, thereby improving the convenience of assembly.

[0110] In one embodiment, Figure 6-9 As shown, one end of the sliding sleeve 222 located in the fixed sleeve 221 is connected to a pressure-bearing sliding plate 2221 , and the pressure-bearing sliding plate 2221 is slidably connected to the wall of the fixed sleeve 221 .

[0111] The elastic buffer member 223 is connected between the pressure-bearing sliding plate 2221 and the top cover 2211 of the fixed sleeve 221 .

[0112] The actuator 224 and the sliding sleeve 222 are located on opposite sides of the pressure-bearing sliding plate 2221 , and the actuator 224 can lift the pressure-bearing sliding plate 2221 .

[0113] In this embodiment, one end of the sliding sleeve 222 is integrally or detachably connected to a pressure-bearing sliding plate 2221. The pressure-bearing sliding plate 2221 is slidably assembled with the wall of the fixed sleeve 221 and can slide axially within the fixed sleeve 221. When the sliding sleeve 222 is extended or retracted, the pressure-bearing sliding plate 2221 slides synchronously within the fixed sleeve 221.

[0114] A top cover 2211 is removably mounted on the opening of the fixed sleeve 221 facing the reinforcing plate 3. The top cover 2211 of the fixed sleeve 221 has a through hole for the sliding sleeve 222 to pass through. The pressure-bearing sliding plate 2221 cannot pass through the through hole of the top cover 2211. During assembly, the top cover 2211 is placed over the sliding sleeve 222 from the end thereof, and then the pressure-bearing sliding plate 2221 is assembled within the fixed sleeve 221. Finally, the fixed top cover 2211 is installed.

[0115] The aforementioned first displacement sensor 227 may be disposed on the bottom surface of the top cover 2211 to monitor the movement distance of the pressure-bearing sliding plate 2221 , thereby determining the telescopic length of the sliding sleeve 222 .

[0116] Elastic buffer 223 is connected between pressure-bearing sliding plate 2221 and top cover 2211, and is used to drive pressure-bearing sliding plate 2221 toward top cover 2211, thereby extending sliding sleeve 222. Elastic buffer 223 can be an expansion spring, which is mounted on the circumference of sliding sleeve 222, and its initial force is used to drive sliding sleeve 222 to extend.

[0117] The actuator 224 is disposed on a side of the pressure-bearing sliding plate 2221 facing away from the sliding sleeve 222 . When in operation, the actuator 224 can lift the pressure-bearing sliding plate 2221 so that the sliding sleeve 222 remains extended and does not retract.

[0118] In an alternative embodiment, the cylinder 2251 of the pusher 225 can be fixedly connected to the bottom surface of the top cover 2211, and the push rod 2252 can retract the sliding sleeve 222 by pushing the pressure-bearing sliding plate 2221. When the pusher 225 is in the initial state, the retracted push rod 2252 is a distance away from the pressure-bearing sliding plate 2221 and does not affect the free sliding of the pressure-bearing sliding plate 2221.

[0119] In one embodiment, Figure 6-9 As shown, a limiting ring 2212 is provided in the fixing sleeve 221 , and the limiting ring 2212 is located between the pressure-bearing sliding plate 2221 and the top cover 2211 .

[0120] When the sliding sleeve 222 is extended to the maximum distance, the pressure-bearing sliding plate 2221 is blocked by the limiting ring 2212 .

[0121] In this embodiment, a stop ring 2212 is provided within the fixed sleeve 221 to stop the pressure-bearing sliding plate 2221. The stop ring 2212 is positioned between the pressure-bearing sliding plate 2221 and the top cover 2211. The aperture of the stop ring 2212 allows the passage of the sliding sleeve 222, but not the pressure-bearing sliding plate 2221. When the sliding sleeve 222 is extended to its maximum distance, the pressure-bearing sliding plate 2221 is stopped by the stop ring 2212, acting as a limiter. This prevents the sliding sleeve 222 from extending too far, which could exert excessive pressure on the reinforcement plate 3 and damage the wall of the tower 1.

[0122] Specifically, the radius of the center hole of the limiting ring 2221 is greater than the distance between the elastic buffer 223 and the center axis of the sliding sleeve 222 . The elastic buffer 223 is in the center hole, and the limiting ring 2221 will not hinder the free expansion and contraction of the elastic buffer 223 .

[0123] The aforementioned first displacement sensor 227 can optionally be installed on the limit ring 2221. A through hole is provided in the limit ring 2221. The first displacement sensor 227 passes through the through hole of the limit ring 2221 from top to bottom, with its monitoring end located within the through hole of the limit ring 2221 and facing the pressure-bearing sliding plate 2221. It is used to monitor the movement distance of the pressure-bearing sliding plate 2221, thereby determining the extension and retraction length of the sliding sleeve 222. This arrangement prevents the first displacement sensor 227 from being blocked by the limit ring 2221 when installed on the top cover 2211. Furthermore, even if the pressure-bearing sliding plate 2221 contacts the limit ring 2221, the first displacement sensor 227 will not be damaged.

[0124] In one embodiment, Figure 6-9 As shown, the limiting ring 2221 is provided with a push rod through hole 2213 for the push rod 2252 to pass through. The cylinder 2251 of the pusher 225 is installed between the limiting ring 2221 and the top cover 2211. The push rod 2252 can extend through the push rod through hole 2213 toward the pressure-bearing sliding plate 2221, thereby pushing the pressure-bearing sliding plate 2221 and causing the sliding sleeve 22 to retract a certain distance.

[0125] When the pusher 225 is in the initial state, the end of the retracted push rod 2252 is between the pressure-bearing sliding plate 2221 and the cylinder 2251 and will not pass through the push rod through hole 2213 , thereby not affecting the free sliding of the pressure-bearing sliding plate 2221 .

[0126] The push rod 2252 will pass through the push rod through hole 2213 only when the pusher 225 is in the working state.

[0127] In one embodiment, Figure 6-9 As shown, the actuator 224 includes a telescopic end 2241 extending toward the pressure-bearing sliding plate 2221 and a driving portion 2242 for driving the telescopic end 2241 to telescope or slide.

[0128] A pressure sensor 228 is provided in the end surface of the telescopic end 2241 facing the pressure-bearing sliding plate 2221 and / or in the bottom surface of the pressure-bearing sliding plate 2221 facing the telescopic end 2241 .

[0129] In this embodiment, the actuator 224 includes a telescopic end 2241 and a driving portion 2242. The telescopic end 2241 is connected to the driving portion 2242. The telescopic end 2241 extends toward the pressure-bearing sliding plate 2221 and can be telescopic relative to the driving portion 2242. The telescopic end 2241 can adopt a telescopic column, a telescopic cylinder, etc. The driving portion 2242 can adopt a hydraulic driving portion or an electric current driving portion. When the driving portion 2242 adopts a hydraulic driving portion, the actuator 224 is a hydraulic cylinder structure. When the driving portion 2242 adopts an electric current driving portion, the driving portion 2242 will be configured with a shape memory alloy, a dielectric elastomer, etc. that can expand when power is applied, and the telescopic end 2241 is pushed out by the shape memory alloy, the dielectric elastomer, etc. that has increased in volume.

[0130] The pressure sensor 228 is located within the end surface of the telescopic end 2241 facing the pressure-bearing sliding plate 2221 and / or within the bottom surface of the pressure-bearing sliding plate 2221 facing the telescopic end 2241. It is used to monitor the pressure of the pressure-bearing sliding plate 2221 and thus determine the pressure applied to the sliding sleeve 222. The monitored pressure data is transmitted back to the control device so that the user can understand the force applied to the sliding sleeve 222.

[0131] In one embodiment, Figure 6 As shown, a second displacement sensor 229 is installed within the fixed sleeve 221 to monitor the displacement of the telescopic end 2241. Data detected by the second displacement sensor 229 is transmitted back to the control device, allowing the user to understand the extension distance of the telescopic end 2241. This helps determine the position and extension length of the sliding sleeve 222, and thus the tightening status of the tower 1. If the telescopic end 2241 extends a long distance, it indicates that the sliding sleeve 222 has extended further, effectively tightening the reinforcement plate 3. If the telescopic end 2241 extends a short distance, it indicates that the sliding sleeve 222 has extended a short distance, which may indicate unsatisfactory tightening of the reinforcement plate 3. Alternatively, the area where the reinforcement plate 3 is located may have convexly deformed, preventing the sliding sleeve 222 from extending. In this case, the user needs to observe the tower wall and make a comprehensive judgment. A threshold value can be preset based on actual conditions to determine the extension length of the telescopic end 2241.

[0132] An embodiment of the present invention provides a method for vibration reduction and reinforcement of a wind turbine tower device, comprising the following steps:

[0133] S01: Monitor the vibration and shaking status of tower 1.

[0134] S02: If the shaking amplitude of the tower 1 is within the shaking warning value, the actuator 224 remains closed, the servo elastic support 22 is in a buffering and vibration reduction state, and the elastic buffer 223 absorbs energy and reduces vibration to offset the vibration of the tower 1.

[0135] If the shaking amplitude of the tower 1 exceeds the shaking warning value, the actuator 224 is in the working state and supports the sliding sleeve 222, and the servo elastic support 22 is in the reinforced support state to improve the structural rigidity of the tower 1 and reduce shaking.

[0136] In one embodiment, the vibration reduction and reinforcement method for a wind turbine tower device further includes the following steps:

[0137] The actuator 224 is in working state and supports the sliding sleeve 222, and the servo elastic bracket 22 is in a reinforced support state to improve the structural rigidity and vibration frequency of the tower 1 to avoid the vibration frequency generated by the wind wheel.

[0138] That is, if it is detected that the vibration frequency generated by the rotation of the wind rotor is lower than the vibration frequency (natural frequency) of the tower 1 itself and is close to the low resonance frequency range, the actuator 224 is used to increase the structural stiffness and vibration frequency of the tower 1.

[0139] Specifically, actuator 224 is in operation and supports sliding sleeve 222, while servo-elastic support 22 is in a reinforced support state. This increases the structural rigidity and vibration frequency of tower 1, thereby avoiding the vibration frequency generated by the wind rotor. This state is a resonance-avoiding and reinforced support state within the reinforced support state of servo-elastic support 22.

[0140] In one embodiment, the vibration reduction and reinforcement method for a wind turbine tower device further includes the following steps:

[0141] The actuator 224 is in the initial state, the pusher 225 in the fixed sleeve 221 is in the working state and pushes the sliding sleeve 222 to retract, so that the reinforcing plate 3 moves toward the inner side of the wall of the tower 1 to reduce the structural rigidity and vibration frequency of the tower 1 to avoid the vibration frequency generated by the wind rotor. In one embodiment, Figure 6-9 As shown, a pusher 225 for driving the sliding sleeve 222 to retract is provided in the fixed sleeve 221 .

[0142] When the pusher 225 is in the initial state, the push rod 2252 of the pusher 225 is in the retracted state and separated from the sliding sleeve 222. When the servo elastic bracket 22 is in the buffering and vibration reduction state and the reinforcement support state, the pusher 225 is in the initial state.

[0143] When the pusher 225 is in operation, the push rod 2252 is extended and pushes the sliding sleeve 222 to retract, so that the reinforcing plate 3 moves toward the inner side of the wall of the tower 1 to reduce the structural stiffness and vibration frequency of the tower 1 .

[0144] That is, when it is necessary to reduce the structural stiffness or rigidity of the tower 1 in order to lower its vibration frequency, the pusher 225 is used to achieve this.

[0145] If it is monitored that the vibration frequency generated by the rotation of the wind rotor is equal to or higher than the vibration frequency (natural frequency) of the tower 1 itself, or the vibration frequency generated by the rotation of the wind rotor is slightly lower than the high resonance frequency range or is within the high resonance frequency range, the pusher 225 is used to reduce the structural stiffness and vibration frequency of the tower 1.

[0146] Specifically, at this time, the actuator 224 is in the initial state and will not hinder the retraction of the sliding sleeve 222. The pusher 225 is in the working state, and its push rod 2252 extends and pushes the sliding sleeve 222 to retract a certain distance. Since the reinforcing plate 3 is supported by a number of sliding sleeves 222 and is not fixedly connected to the wall of the tower 1, the retracted sliding sleeve 222 will drive the reinforcing plate 3 to leave the inner surface of the wall of the tower 1 by a certain distance. This distance can be controlled between a few millimeters and a few centimeters, so that the elastic cushion 4 leaves the inner surface of the wall of the tower 1. At this time, the reinforcing plate 3 no longer supports the wall of the tower 1, so the structural stiffness or rigidity of the tower 1 will be reduced accordingly, thereby reducing the vibration frequency of the tower 1 to avoid the vibration frequency generated by the wind wheel as much as possible. What is referred to here is lowering the vibration frequency of the tower 1 to avoid the vibration frequency generated by the wind wheel as much as possible, which means lowering the upper limit of the high resonance frequency range by lowering the vibration frequency of the tower 1. The effects are the two effects mentioned above. One is that it can be completely avoided, and the other is that although it cannot be completely avoided, the resonance time can be shortened.

[0147] As needed, the above technical solutions can be combined to achieve the best technical effect.

[0148] The above are only the principles and preferred embodiments of the present invention. It should be noted that, for those skilled in the art, several other variations can be made based on the principles of the present invention, which should also be considered as the scope of protection of the present invention.

Claims

1. A wind power tower device, characterized in that: It comprises a tower (1) and a plurality of vibration reduction and reinforcement mechanisms (2) arranged in the tower (1) and uniformly distributed along the circumference of the tower (1); The inner wall of the tower (1) is uniformly distributed with a plurality of longitudinal ribs (11) at intervals along the circumferential direction, an arc-shaped reinforcement plate (3) is arranged between every two adjacent longitudinal ribs (11), and an elastic cushion layer (4) is arranged between each reinforcement plate (3) and the tower (1); Each set of the vibration reduction and reinforcement mechanism (2) comprises a main connecting seat (21) fixedly connected to one of the longitudinal ribs (11) and two sets of servo elastic brackets (22) arranged on opposite sides of the main connecting seat (21) and respectively hinged to the main connecting seat (21); Two sets of the servo elastic supports (22) are respectively hinged to the two reinforcing plates (3) located on both sides of the longitudinal convex rib (11), and each reinforcing plate (3) is supported by two servo elastic supports (22) in two adjacent sets of the vibration reduction and reinforcement mechanisms (2), so that the reinforcing plates (3) press the elastic cushion layer (4); The servo elastic support (22) comprises a fixed sleeve (221), a sliding sleeve (222) slidably connected to the fixed sleeve (221) and hinged to the reinforcing plate (3), an elastic buffer (223) connected between the fixed sleeve (221) and the sliding sleeve (222), and an actuator (224) provided in the fixed sleeve (221) and used to eject the sliding sleeve (222); When the servo elastic support (22) is in a buffering and vibration-reducing state, the actuator (224) is in a closed state, and the elastic buffer (223) absorbs energy and reduces vibration to offset the vibration of the tower (1); When the servo elastic support (22) is in a reinforced support state, the actuator (224) is in a working state and presses against the sliding sleeve (222) to increase the structural rigidity of the tower (1) and reduce shaking.

2. The wind turbine tower device according to claim 1, characterized in that: A pusher (225) for driving the sliding sleeve (222) to retract is provided in the fixed sleeve (221); When the pusher (225) is in the initial state, the push rod (2252) of the pusher (225) is in the retracted state and separated from the sliding sleeve (222); when the servo elastic support (22) is in the buffering and vibration reduction state and the reinforcement and support state, the pusher (225) is in the initial state; When the pusher (225) is in a working state, the push rod (2252) is in an extended state and pushes the sliding sleeve (222) to retract, so that the reinforcing plate (3) moves toward the inner side of the wall of the tower (1) to reduce the structural stiffness and vibration frequency of the tower (1).

3. The wind turbine tower device according to claim 1, characterized in that: A vibration sensor (226) is provided in one end of the sliding sleeve (222) facing the reinforcing plate (3); And / or, a first displacement sensor (227) for monitoring the displacement of the sliding sleeve (222) is provided on the inner side or the outer side of the fixed sleeve (221).

4. The wind turbine tower device according to any one of claims 1 to 3, characterized in that: One end of the sliding sleeve (222) located inside the fixed sleeve (221) is connected to a pressure-bearing sliding plate (2221), and the pressure-bearing sliding plate (2221) is slidably connected to the wall of the fixed sleeve (221); The elastic buffer member (223) is connected between the pressure-bearing sliding plate (2221) and the top cover (2211) of the fixed sleeve (221); The actuator (224) and the sliding sleeve (222) are located on opposite sides of the pressure-bearing sliding plate (2221), and the actuator (224) is capable of lifting the pressure-bearing sliding plate (2221).

5. The wind turbine tower device according to claim 4, characterized in that: A limiting ring (2212) is provided in the fixed sleeve (221), and the limiting ring (2212) is located between the pressure-bearing sliding plate (2221) and the top cover (2211); When the sliding sleeve (222) is extended to the maximum distance, the pressure-bearing sliding plate (2221) is blocked by the limiting ring (2212).

6. The wind turbine tower device according to claim 4, characterized in that: The actuator (224) comprises a telescopic end (2241) extending toward the pressure-bearing sliding plate (2221) and a driving portion (2242) for driving the telescopic end (2241) to telescope or slide; A pressure sensor (228) is provided in the end surface of the telescopic end (2241) facing the pressure-bearing sliding plate (2221) and / or in the bottom surface of the pressure-bearing sliding plate (2221) facing the telescopic end (2241).

7. The wind turbine tower device according to claim 6, characterized in that: A second displacement sensor (229) for monitoring the displacement of the telescopic end (2241) is provided in the fixed sleeve (221).

8. A vibration reduction and reinforcement method for a wind turbine tower device according to any one of claims 1 to 7, characterized in that: The steps include: S01: monitoring the vibration and shaking state of the tower (1); S02: If the sway amplitude of the tower (1) is within the sway warning value, the actuator (224) remains closed, the servo elastic support (22) is in a buffering and vibration reduction state, and the elastic buffer (223) absorbs energy and reduces vibration to offset the vibration of the tower (1); If the sway amplitude of the tower (1) exceeds the sway warning value, the actuator (224) is in a working state and supports the sliding sleeve (222), and the servo elastic support (22) is in a reinforced support state to increase the structural rigidity of the tower (1) and reduce sway.

9. The vibration reduction and reinforcement method for a wind turbine tower device according to claim 8, characterized in that: The steps include: The actuator (224) is in a working state and supports the sliding sleeve (222), and the servo elastic support (22) is in a reinforced support state to improve the structural rigidity and vibration frequency of the tower (1) to avoid the vibration frequency generated by the wind wheel.

10. The vibration reduction and reinforcement method for a wind turbine tower device according to claim 8, characterized in that: The steps include: The actuator (224) is in an initial state, the pusher (225) in the fixed sleeve (221) is in a working state and pushes the sliding sleeve (222) to retract, so that the reinforcing plate (3) moves toward the inner side of the wall of the tower (1), thereby reducing the structural stiffness and vibration frequency of the tower (1) to avoid the vibration frequency generated by the wind wheel.

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