CN113531024B

CN113531024B - Liquid damper and tower of wind generating set

Info

Publication number: CN113531024B
Application number: CN202010300546.4A
Authority: CN
Inventors: 王康世; 周眉宏; 曹广启
Original assignee: Shanghai Electric Wind Power Group Co Ltd
Current assignee: Shanghai Electric Wind Power Group Co Ltd
Priority date: 2020-04-16
Filing date: 2020-04-16
Publication date: 2023-05-26
Anticipated expiration: 2040-04-16
Also published as: CN113531024A

Abstract

The application provides a liquid damper and a tower of a wind generating set. The liquid damper is applied to a tower of the wind generating set and comprises a plurality of liquid storage tanks and a bearing assembly, and the bearing assembly bears a plurality of liquid storage tanks. The liquid damper can effectively inhibit vibration of the tower, reduce fatigue load of the tower, improve safety of unit operation and prolong service life of the unit.

Description

Liquid damper and tower of wind generating set

Technical Field

The application relates to the technical field of wind power, in particular to a liquid damper and a tower barrel of a wind generating set.

Background

Vibration or swing of the wind generating set caused by random wind, wave ocean currents, unbalanced transmission parts and the like can have adverse effects on the safety and service life of the wind generating set. In particular to an all-steel high tower or an offshore single pile foundation tower, because the power of a generator set is high and blades are long, the tower is subjected to the combined action of loads such as random wind, wave ocean currents and the like, and the vibration and fatigue of the tower cannot be ignored. Therefore, vibration suppression and fatigue load reduction are important tasks in the wind power industry.

Disclosure of Invention

The application provides an improved liquid damper and a tower of a wind generating set.

A liquid damper for use in a tower of a wind turbine generator, the liquid damper comprising:

a plurality of liquid storage tanks; and

and the bearing assembly bears a plurality of liquid storage tanks.

In one embodiment, the liquid storage tank comprises a tank body for storing damping liquid, and the ratio of the maximum longitudinal dimension to the maximum transverse dimension of the orthographic projection of the tank body in the horizontal plane is greater than 1.

In one embodiment, the ratio of the maximum longitudinal dimension to the maximum transverse dimension is in the range of 3 to 10.

In one embodiment, the box comprises a first box section and a second box section which is respectively arranged at two ends of the first box section along the longitudinal direction, and the area of the minimum cross section of the first box section is smaller than that of the minimum cross section of the second box section.

In one embodiment, the housing includes a bottom plate and a top plate, the top plate includes a recessed portion recessed toward one side of the bottom plate, and the first housing section includes the recessed portion.

In one embodiment, the recessed portion includes an inclined portion extending obliquely toward the bottom plate in a direction from the second tank section toward the first tank section.

In one embodiment, at least one end of the bottom plate in the longitudinal direction is tilted toward a side near the top plate.

In one embodiment, the liquid storage tank comprises a supporting rib protruding out of the tank body, wherein the supporting rib protrudes out of the concave portion and/or the tilted portion of the bottom plate.

In one embodiment, the second tank section is symmetrically disposed at both ends of the first tank section in the longitudinal direction.

In one embodiment, the bearing assembly includes an outer frame with a grid structure and a grid block arranged in the outer frame, wherein the space in the outer frame is divided into a plurality of subspaces by the grid block, and at least one subspace is internally provided with the liquid storage tank.

In one embodiment, a plurality of liquid storage tanks are vertically stacked in at least one subspace.

In one embodiment, at least two subspaces are distributed in an upper layer and a lower layer, and the liquid storage tanks are arranged in at least two subspaces distributed in the upper layer and the lower layer; and/or

At least two subspaces are provided with the liquid storage tanks, and the liquid storage tanks are arranged in parallel in the at least two subspaces.

One embodiment, the bearing assembly comprises a pressing block arranged at the top of the outer frame, the pressing block is propped against the liquid storage tank, and/or

The bearing assembly comprises a first stop block and a second stop block which are arranged on the side part of the outer frame, and the first stop block and the second stop block are respectively blocked at two longitudinal ends of the liquid storage tank.

In one embodiment, the load bearing assembly comprises a suspension structure for suspension within a tower of a wind turbine.

A tower of a wind generating set, comprising:

a tower body;

a liquid damper according to any preceding claim, wherein the liquid damper is mounted within the tower body.

In one embodiment, the tower further comprises a suspension assembly, the suspension assembly comprises a suspension bracket and a first rotating assembly arranged on the suspension bracket, the suspension bracket is connected with the tower body, and the liquid damper is connected with the first rotating assembly and rotates relative to the tower body.

In one embodiment, the suspension bracket comprises a bracket body and a plurality of connecting rods, wherein each connecting rod is connected with the tower body and the bracket body respectively, and the first rotating assembly is arranged on the bracket body.

In one embodiment, the support body includes a fixed mounting portion, the fixed mounting portion is fixedly connected with the tower body, and/or the first rotating assembly is disposed at a midpoint of the support body.

An embodiment, the tower still including locating the spacing subassembly of liquid damper bottom, spacing subassembly include spacing support with set up in the second of spacing support rotates the subassembly, spacing support with tower section of thick bamboo body coupling, liquid damper with the second rotates the subassembly and is connected, first rotate the subassembly with the second rotates the subassembly coaxial.

The technical scheme that this application provided can reach following beneficial effect:

the application provides a liquid damper and wind generating set's tower section of thick bamboo, liquid damper are applied to wind generating set's tower section of thick bamboo, including bearing assembly and bear a plurality of liquid reserve tanks including. The liquid damper can effectively inhibit vibration of the tower, reduce fatigue load of the tower, improve safety of unit operation and prolong service life of the unit.

Drawings

FIG. 1 is a schematic view of a portion of a tower of a wind turbine shown in an exemplary embodiment of the present application;

FIGS. 2-4 are schematic illustrations of various embodiments of a liquid reservoir in a liquid damper provided herein;

FIG. 5 is a schematic view of a carrier assembly in the liquid damper shown in FIG. 1;

FIG. 6 is a cross-sectional view of a portion of the structure of a tower of the wind turbine shown in FIG. 1;

FIG. 7 is an enlarged view of the portion A of FIG. 1;

FIG. 8 is an enlarged view of the portion B of FIG. 6;

fig. 9 is an enlarged view of the portion C in fig. 6.

Detailed Description

Reference will now be made in detail to exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numbers in different drawings refer to the same or similar elements, unless otherwise indicated. The implementations described in the following exemplary examples are not representative of all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with some aspects of the present application as detailed in the accompanying claims.

The terminology used in the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The terms "first," "second," and the like in the description and in the claims, are not used for any order, quantity, or importance, but are used for distinguishing between different elements. Likewise, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "plurality" means two or more. Unless otherwise indicated, the terms "front," "rear," "lower," and/or "upper," "top," "bottom," and the like are merely for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that elements or items appearing before "comprising" or "comprising" are encompassed by the element or item recited after "comprising" or "comprising" and equivalents thereof, and that other elements or items are not excluded. The terms "connected" or "connected," and the like, are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

Referring to fig. 1, fig. 1 is a schematic view showing a part of a tower structure of a wind turbine generator system according to an exemplary embodiment of the present application, wherein a part of a tower body 10 is removed to show a liquid damper 20.

The embodiment of the application provides a tower (hereinafter referred to as tower) of a wind generating set, which comprises a tower body 10 and a liquid damper 20 installed in the tower body 10. In one embodiment, the liquid damper 20 may be suspended from the interior of the tower body 10 by a suspension assembly 30. The suspension assembly 30 will be described below.

The liquid damper 20 includes a plurality of liquid storage tanks 22, and each liquid storage tank 22 stores damping liquid, and when the tower vibrates (e.g., swings) under the action of external load, the damping liquid in the liquid storage tank 22 moves in the opposite direction of the vibration direction under the action of inertia, so as to inhibit the vibration, thereby achieving the purposes of vibration reduction and damping.

The liquid damper 20 further includes a carrier assembly 21, and a plurality of liquid tanks 22 are carried within the carrier assembly 21. The plurality of liquid reservoirs 22 in the liquid damper 20 may be placed in a single layer or vertically aligned. Alternatively, a part of the liquid storage tanks 22 are arranged in a single layer, and the other part of the liquid storage tanks 22 are arranged vertically. Wherein, the vertical arrangement direction is consistent with the height direction of the tower body 10.

The specific arrangement of the plurality of oil reservoirs 22 arranged in the vertical direction is not limited. In one embodiment, a plurality of reservoirs 22 may be stacked with adjacent reservoirs 22 in direct contact. In another embodiment, a plurality of reservoirs 22 may be separated from each other by a partition, with adjacent reservoirs 22 not in contact. In yet another embodiment, a plurality of oil reservoirs 22 are provided, with a portion of the reservoirs 22 stacked and a portion of the reservoirs 22 spaced apart from each other. Wherein the specific number of stacked oil reservoirs 22 is not limited and the specific number of mutually spaced oil reservoirs 22 is not limited.

In the embodiment shown in fig. 1, the plurality of oil reservoirs 22 are arranged in a plurality of columns, each column including a plurality of oil reservoirs 22 arranged vertically. In each column, two oil reservoirs 22 in the middle are separated by a partition 214, the oil reservoirs 22 above the partition 214 being stacked, and the oil reservoirs 22 below the partition 214 being stacked. The number of the oil reservoirs 22 above the partition 214 is equal to the number of the oil reservoirs 22 below the partition 214.

Referring to fig. 2-4, fig. 2-4 are schematic diagrams of different embodiments of the liquid storage tank 22.

The reservoir 22 includes a housing 220 for storing damping fluid. In one embodiment, the ratio of the maximum longitudinal (X-direction in the figure) dimension to the maximum lateral (Y-direction in the figure) dimension of the front projection of the housing 220 in the horizontal plane (XY-plane) is greater than 1. The use of the case 220 having an aspect ratio greater than 1 facilitates the placement and removal of the case 220 into and out of the tower body 10, facilitating maintenance of the tank 22. Of course, regarding the liquid storage tank 22 shown in fig. 2 and 4, the dimension of the tank 220 in the thickness direction (Z direction in the drawing) is also considered to avoid interference with the tower body 10.

The specific shape of the case 220 is not limited, and may be a rectangular parallelepiped structure, a cylindrical structure, a pyramidal structure, or a polyhedral structure. The tank 220 includes a filling hole 221 for filling the damping fluid into the tank 220, and is sealed with an end cap after filling.

In a specific embodiment, the ratio of the maximum longitudinal dimension to the maximum lateral dimension of the case 220 in the orthographic projection in the horizontal plane (XY plane) ranges from 3 to 10. For example, 3, 3.5, 3.8, 4, 4.2, 4.5, 4.8, 5, 5.3, 5.5, 6, 6.5, 6.7, 7, 7.5, 8, 8.5, 9, 9.5, 10 are possible. Further, the ratio of the maximum longitudinal dimension to the maximum transverse dimension may range from 4 to 6. For example 4, 4.2, 4.6, 4.8, 5, 5.2, 5.4, 5.6, 5.8, 6. When the ratio of the maximum longitudinal dimension to the maximum lateral dimension of the tank 220 is gradually increased, the maximum longitudinal dimension of the tank 220 is also gradually increased, and the longitudinal filling depth is also increased, so that the number of the liquid storage tanks 22 in the liquid damper 20 can be correspondingly reduced.

In an actual application scenario, the volume of the damping fluid filled in the tank 220 may be less than or equal to 1/2 of the total volume of the tank 220. On the one hand, when the tower vibrates, the damping fluid impacts the side wall of the box 220 due to the reverse flow of inertia, if enough space is reserved in the box 220, the damping fluid can generate enough kinetic energy in the reverse flow process, so that the effective mass of the damping fluid is increased, and the vibration inhibiting effect is better. On the other hand, when one of the tanks 220 fails, the damping fluid in the failed tank 220 can be temporarily pumped into the other tank 220, and then the replaced tank 220 is pumped back, so that the failed tank 220 is convenient to maintain.

The liquid damper 20 provided in the embodiment of the present application employs a liquid reservoir 22 shown in fig. 4. Of course, in other embodiments, the liquid damper 20 may also employ the liquid reservoir 22 shown in fig. 2 and 3.

In the embodiment shown in fig. 4, the case 220 includes a first case section 220a and second case sections 220b provided at both ends of the first case section 220a in the longitudinal direction, respectively. Wherein the area of the smallest cross-section of the first housing section 220a is smaller than the area of the smallest cross-section of the second housing section 220b. That is, the case 220 is provided as a variable cross-section case, the cross-section of the middle portion is small, and the cross-section of both ends is large. When the tower is severely vibrated or the amplitude is large, the flow pattern of the damping fluid is mostly turbulent, and the throughput of the damping fluid at the portion is small due to the small cross-sectional area of the first tank section 220a, thereby restricting the turbulent flow. Conversely, when the tower is slightly vibrated or the amplitude is small, the flow form of the damping fluid is mostly laminar, and the first tank section 220a with the smaller cross section does not obstruct the laminar flow.

With continued reference to fig. 4, the case 220 includes a bottom plate 222 and a top plate 223, the top plate 223 including a recess portion 223a recessed toward one side of the bottom plate 222, wherein the first case segment 220a includes the recess portion 223a. The concave portion 223a is concave toward the bottom plate 222, whereby the cross section of the first casing section 220a can be made small, and the cross section of the second casing section 220b at both ends is large, forming a variable-section casing structure.

The specific structure of the concave portion 223a is not limited. For example, the concave portion 223a may be provided as a curved concave structure or may be provided as an inclined surface concave structure. In this embodiment, the latter is employed. Specifically, the recess portion 223a includes an inclined portion 223b, and the inclined portion 223b extends obliquely from the second casing section 220b toward the first casing section 220a toward the bottom plate 222 to form a declined structure. Specifically, the inclined portion 223b includes a first inclined portion 223ba and a second inclined portion 223bb, the first inclined portion 223ba is inclined downward toward the bottom plate 222 from one of the second casing sections 220b toward the first casing section 220a, the second inclined portion 223bb is inclined downward toward the bottom plate 222 from the other of the second casing sections 220b toward the first casing section 220a, and the first inclined portion 223ba is in contact with the second inclined portion 223 bb. In the present embodiment, the first inclined portion 223ba and the second inclined portion 223bb are connected by a transition portion 223 bc. The transition 223bc may be parallel to the bottom plate 222. The inclined surface concave structure makes the arrangement of the concave portion 223a simpler, and facilitates the processing and manufacturing of the case 220.

At least one end of the bottom plate 222 in the longitudinal direction may be tilted toward a side near the top plate 223. After the longitudinal end of the bottom plate 222 is tilted, the damping fluid at the tilted end has potential energy, and when the tower vibrates, the damping fluid at the tilted end is easy to start, can flow timely and rapidly, and has higher sensitivity for inhibiting vibration. In the embodiment shown in fig. 4, both ends in the longitudinal direction of the bottom plate 222 are tilted, and both ends in the longitudinal direction of the bottom plate 222 are inclined to the side close to the top plate 223, respectively.

The liquid storage tank 22 further includes a supporting rib 224 protruding from the casing 220, where the supporting rib 224 protrudes from the recess 223a, and/or the supporting rib 224 protrudes from the tilted portion of the bottom plate 222. The supporting ribs 224 can increase the contact area between the liquid storage tank 22 and the bearing assembly 21, so that the liquid storage tank 22 is more stable in the bearing assembly 21. In addition, the support ribs 224 may also allow for more contact and more stable support of multiple stacked tanks 22 relative to one another.

The support rib 224 may be provided in plurality, and the plurality of support ribs 224 may extend in the longitudinal direction of the case 220. In other embodiments, a plurality of support ribs 224 may extend in a lateral direction of the housing 220. Alternatively, the plurality of support ribs 224 include longitudinal support ribs and transverse support ribs that are disposed to intersect each other. In the embodiment shown in fig. 4, the recess 223a is provided with a plurality of support ribs 224 extending in the longitudinal direction of the case 220, in parallel with each other. The raised portion of the bottom plate 222 is provided with a plurality of support ribs 224 extending in the longitudinal direction of the case 220, parallel to each other.

The case 220 may also be provided in a symmetrical structure, for example, the second case section 220b is symmetrically provided at both ends of the first case section 220a in the longitudinal direction. The box 220 can be made of industrial plastic through a blow molding process, and the box 220 can also be made of metal materials. The damping fluid can be prepared from water, preservative, antifreezing agent and the like according to a certain proportion. The tank 220 may be leak tested prior to filling.

In the carrier assembly 21, the bottom plate 222 of the tank 220 serves as a placement reference surface, so that the liquid damper 20 can suppress an external load by a longitudinal flow of the damping liquid in the tank 220 by utilizing the longitudinal length of the tank 220. This will be described in detail below.

Referring to fig. 5, fig. 5 is a schematic view of the carrier assembly 21 shown in fig. 1.

In one embodiment, the carrier assembly 21 includes an outer frame 210 having a grid structure, the outer frame 210 including a bottom plate 210a, a top plate 210b, and a plurality of posts 210c connected between the bottom plate 210a and the top plate 201 b. Wherein the top plate 201b may be provided as a mesh plate, but is not limited thereto. The plurality of columns 210c are connected to the edges of the bottom plate 210a and the top plate 201b, and a space is reserved inside the outer frame 210.

The outer frame 210 further includes a barrier 212, and the space within the outer frame 210 is divided into a plurality of subspaces 210d by the barrier 212. The barrier 212 is disposed in the space of the outer frame 210 and connected to the bottom plate 210a and the top plate 201 b. The specific structure of the barrier 212 is not limited, and for example, a plate-shaped barrier 212 may be employed. In this embodiment, the ribs 212 are configured as a rod-shaped structure, and a plurality of rod-shaped ribs 212 are arranged at intervals to jointly enclose the subspace 210d. The stops 212 may allow the reservoirs 22 to be arranged more regularly and orderly within the outer frame 210.

In one embodiment, a reservoir 22 may be disposed within at least one subspace 210d. That is, whether to place the liquid storage tanks 22 in each subspace 210d, and the number of liquid storage tanks 22 placed may be selected according to actual requirements. For example, the tank 22 may be placed in one or more subspaces 210d, while the tank 22 is not placed in another subspace 210d. For another example, only one tank 22 may be disposed in a portion of the subspace 210d, and two or more tanks 22 may be disposed in another portion of the subspace 210d. In a practical scenario, when the liquid storage tank 22 is placed in one subspace 210d, a plurality of liquid storage tanks 22 may be stacked in the subspace 210d. In another practical application scenario, if the liquid storage tanks 22 are placed in the plurality of subspaces 210d, at least two subspaces 210d arranged vertically may be provided, the number of the liquid storage tanks 22 placed in the at least two subspaces 210d arranged vertically is not limited, one or more liquid storage tanks 22 may be provided, and a plurality of liquid storage tanks 22 may be stacked.

In another embodiment, a plurality of liquid storage tanks 22 may be vertically stacked in at least one subspace 210d among the plurality of subspaces 210d. That is, a plurality of tanks 22 may be vertically stacked in one subspace 210d, or a plurality of tanks 22 may be vertically stacked in a plurality of subspaces 210d. The stacked state of the plurality of tanks 22 in the subspace 210d can be referred to as fig. 6. In some embodiments, a portion of the subspace 210d may be provided with a plurality of tanks 22 vertically stacked therein, and the number and arrangement of the tanks 22 in the remaining subspace 210d are not limited except for the subspace 210d where a plurality of tanks 22 are stacked, and may be stacked or spaced apart from each other.

The bearing assembly 21 may further include a partition 214, and the space in the outer frame 210 may be partitioned into at least two subspaces 210d distributed according to an upper layer and a lower layer by the partition 214, so that the liquid storage tank 22 may be placed in the at least two subspaces distributed according to the upper layer and the lower layer, so as to form an arrangement manner along a vertical direction. Specifically, the separator 214 is horizontally disposed in the outer frame 210 and connected to the pillars 210c and the stops 212.

In the embodiment shown in fig. 5, a partition 214 is provided, the space in the outer frame 210 is divided into an upper layer and a lower layer by the partition 214, and a barrier 212 is provided above and below the partition 214, and the barrier 212 divides the upper layer space and the lower layer space into a plurality of subspaces, respectively. In other embodiments, a plurality of spacers 214 may be provided, and the spacers 214 may be arranged at intervals in the vertical direction to divide the space within the outer frame 210 into upper and lower layers.

The partition 214 partitions the subspaces 210d penetrating up and down, so that the number of the subspaces 210d is increased and the volume is reduced. In this way, a smaller number of reservoirs 22 may be stacked or placed within the partitioned subspace 210d. If a failure occurs in a tank 22 in one of the subspaces 210d, the failed tank 22 in that subspace 210d can be disassembled independently, which has less influence on the oil storage tanks 22 in other subspaces 210d around, and is convenient for transportation and disassembly.

The arrangement of the separator 214 and the barrier 212 is not limited to the above. For example, in other embodiments, the shelves 212 may be disposed only above the divider 214, or the shelves 212 may be disposed only below the divider 214. For another example, a smaller-sized partition may be used, and a portion of the subspace 210d is divided into upper and lower layers by the smaller-sized partition, and the remaining subspace 210d remains vertically penetrated.

In one embodiment, in the plurality of subspaces 210d, the liquid storage tanks 22 placed in at least two subspaces 210d may be disposed parallel to each other. That is, the longitudinal direction of the tanks 22 in at least two subspaces is identical. Of course, in other embodiments, the longitudinal direction of the tank 22 in both subspaces may be inclined relative to each other.

With continued reference to fig. 5, the bearing assembly 21 further includes a pressing block 215 disposed on top of the outer frame 210, specifically, the pressing block 215 is connected to the top plate 210b, extends downward and abuts against the liquid storage tank 22, and the pressing block 215 can limit the freedom degree of the liquid storage tank 22 in the vertical direction. The specific shape and number of the pressing blocks 215 are not limited, and may be selected according to actual needs. In the embodiment shown in fig. 5, the pressing blocks 215 are divided into two groups, one group being connected to the lower surface of the top plate 210b and the other group being connected to the lower surface of the partition 214. Each group comprises a plurality of pressing blocks 215, and the pressing blocks 215 are distributed along the longitudinal direction of the liquid storage tank 22 and respectively pressed against different parts of the longitudinal direction of the liquid storage tank 22. Wherein, the pressing block 215 connected to the top plate 210b may be used to press the liquid storage tank 22 disposed above the partition 214, and the pressing block 215 connected to the partition 214 may be used to press the liquid storage tank 22 disposed below the partition 214.

The carrying assembly 21 further includes a first stop block 216a and a second stop block 216b disposed on the side of the outer frame 210, where the first stop block 216a and the second stop block 216b are respectively blocked at two longitudinal ends of the liquid storage tank 22, so as to limit the freedom of the liquid storage tank 22 along the longitudinal direction thereof. For the subspace 210d of the lower layer, the first stopper 216a and the second stopper 216b may be protruded on the upper surface of the bottom plate 210a, and for the subspace 210d of the upper layer, the first stopper 216a and the second stopper 216b may be protruded on the upper surface of the partition 214. It should be appreciated that the securing structure for securing the reservoir 22 within the carrier assembly 21 is not limited to the press block 215, the first stop 216a, and the second stop 216b described above, as many other embodiments exist.

The bearing assembly 21 further includes a suspension structure 217, where the suspension structure 217 is disposed on top of the outer frame 210 and may be fixedly connected or hinged to the top plate 210 b. Suspension structure 217 is adapted to be coupled to suspension assembly 30 such that liquid damper 20 is suspended within a tower of the wind turbine.

In one embodiment, suspension structure 217 includes lifting lugs. One or more lifting lugs may be provided, and in this embodiment, the lifting lugs include a first lifting lug 217a and a second lifting lug 217b, and the first lifting lug 217a and the second lifting lug 217b may be connected together with the suspension assembly 30. The first and second lifting lugs 217a, 217b may be connected to the suspension assembly 30 by a connector 218 disposed in a lug hole, and the connector 218 may be a fixed pin or a bolt. There are numerous embodiments of the suspension structure 217, not limited to the lifting lugs shown in fig. 5.

Referring to fig. 6, fig. 6 is a cross-sectional view showing a part of the structure of the tower shown in fig. 1.

In the embodiment shown in fig. 6, the partition 214 divides the space within the outer frame 210 into two layers, an upper layer space is divided into four subspaces 210d by the barrier 212, and a lower layer space is divided into four subspaces 210d by the barrier 212, forming eight subspaces 210d in total. Each subspace 210d is stacked with a plurality of oil reservoirs 22, the bottom surface of the upper reservoir 22 is supported on the support rib 224 of the concave portion 223a of the lower reservoir 22, and the support rib 224 of the bottom plate 222 of the upper reservoir 22 is supported on the top plate 223 of the lower reservoir 22 (refer to fig. 1).

The reservoirs 22 in each subspace 210d are parallel to each other, and the longitudinal directions of the respective reservoirs 220 coincide. When the tower vibrates under the action of external load, the damping liquid in each box 220 flows in the direction opposite to the vibration direction, and because the longitudinal directions of the boxes 220 are consistent, the acting forces generated when the damping liquid in each box 220 impacts the side wall of the box 220 can form resultant forces to jointly drive the liquid damper 20 to rotate, so that the effective mass of the damping liquid for inhibiting vibration of the liquid damper 20 is increased, and the effects of damping and inhibiting vibration can be effectively achieved.

Referring to fig. 1, a liquid damper 20 is suspended within a tower body 10 by a suspension assembly 30. In one embodiment, the suspension assembly 30 includes a suspension bracket 31 and a first rotation assembly 32 disposed on the suspension bracket 31. Wherein, the suspension bracket 31 is connected with the tower body 10, the liquid damper 20 is connected with the first rotating component 32, and rotates relative to the tower body 10. Because the liquid damper 20 can rotate relative to the tower body 10, when the tower vibrates under the action of external load, the damping liquid in the liquid damper 20 moves in the opposite direction of the vibration direction under the action of inertia, and the damping liquid moves to impact the side wall of the liquid storage tank 22, so that acting force is applied to the liquid storage tank 22. When the movement direction of the damping fluid has an included angle with the longitudinal direction of the liquid storage tank 22, the acting force of the damping fluid to the side wall of the liquid storage tank 22 causes the liquid damper 20 to generate torque, and the liquid damper 20 overcomes the resistance to rotate until the longitudinal direction of the liquid storage tank 22 is consistent with the acting force of the damping force to the tank 220. The response of the liquid damper 20 to the vibration of the tower is to suppress and cancel the external load acting on the tower. If the tower tube continuously vibrates, the damping liquid can continuously flow in the opposite direction, and damping force is continuously generated to restrain vibration. It can be seen that the use of the suspended and rotatable liquid damper 20 can automatically rotate the liquid damper 20 under the action of the damping liquid until the longitudinal direction of the liquid storage tank 22 is consistent with the vibration direction of the tower, and the opposite flow of the damping liquid can effectively balance and restrain the vibration of the tower.

The specific structure of the suspension bracket 31 is not limited in this application. In the embodiment shown in fig. 1, the suspension bracket 31 includes a bracket body 310 and a plurality of links 312, each link 312 being connected to the tower body 10 and the bracket body 310, respectively. The link 312 may be fixedly connected or hinged to the bracket body 310. The connecting rod 312 may be fixedly connected or hinged to the tower body 10, and in one embodiment, the connecting rod 312 may be connected to the tower body 10 through the first connecting member 314, and the structure of the first connecting member 314 is not limited. In this embodiment, the first connecting member 314 is a trapezoidal plate. The first connecting piece 314 and the connecting rod 312 are respectively provided with a connecting hole, and a fastener penetrates into the connecting holes to be locked and fixed. The first connecting piece 314 may be welded with the tower body 10 made of metal, or pre-buried in the tower body 10 made of concrete. The specific number of the connecting rods 312 is not limited, in this embodiment, eight connecting rods 312 are provided, and the connection points of each connecting rod 312 and the tower body 10 are distributed along the circumferential direction.

In one embodiment, the bracket body 310 includes a first beam 310a and a second beam 310b that intersect perpendicularly, the first beam 310a and the second beam 310b being fixedly connected at an intersection point. The specific number of first beams 310a and second beams 310b is not limited. The bracket body 310 may include more than two first beams 310a and/or more than two second beams 310b. In this embodiment, two first beams 310a are provided, two first beams 310a are parallel to each other, two second beams 310b are provided, and two second beams 310b are parallel to each other. The first beam 310a and/or the second beam 310b may employ a hollow beam having a rectangular cross section, but is not limited thereto.

The first beam 310a perpendicularly crosses the two second beams 310b and is divided into three sections including a middle section 310ab between the two second beams 310b and outer sections 310aa, 310ac connected to both ends of the middle section 310ab, and links 312 are connected to the outer sections 310aa, 310ac of the first beam 310a, respectively. The second beam 310b perpendicularly crosses the two first beams 310a and is divided into three sections including a middle section 310bb between the two first beams 310a and outer sections 310ba, 310bc connected to both ends of the middle section 310bb, and the link 312 is connected to the outer sections 310ba, 310bc of the second beam 310b, respectively. It should be appreciated that the stent body 310 is not limited to the configuration shown in fig. 1.

Further, the bracket body 310 further includes a fixing and mounting portion 315, and the fixing and mounting portion 315 is fixedly connected with the tower body 10. The specific structure and number of the fixing mount portions 315 are not limited. In the embodiment shown in fig. 1, the first beam 310a and the second beam 310b each include a fixed mounting portion 315, and are fixedly connected to the tower body 10 by the fixed mounting portions 315. In one embodiment, the fixing portion 315 may be welded to the metal tower body 10 or embedded in the concrete tower body 10. In one embodiment, the fixed mounting portion 315 may be configured as an inverted U-shaped plate with a U-shaped surface coupled to the tower body 10 and the first beam 310a and/or the second beam 310b coupled to a top surface of the fixed mounting portion 315.

The first rotating assembly 32 is disposed on the bracket body 31, for example, and is fixedly connected with the bracket body 31. In one embodiment, the first rotating component 32 may be disposed at the midpoint of the bracket body 31. This allows the liquid damper 20 to be installed in the central region of the tower body 10, avoiding interference with the tower body 10 during rotation. In the present embodiment, the first rotating assembly 32 is disposed in a space defined by the two first beams 310a and the two second beams 310b, and the space is located at the center of the bracket body 31.

Referring to fig. 7, fig. 7 is an enlarged view of the portion a in fig. 1.

The first rotating assembly 32 is fixedly connected with the bracket body 31. In one embodiment, the first beam 310a includes a first connection rib 310ad and/or the second beam 310b includes a second connection rib 310bd, the first rotating assembly 32 is coupled to the first connection rib 310ad, and/or the first rotating assembly 32 is coupled to the second connection rib 310 bd.

Further, the two first beams 310a may include first connection ribs 310ad, the two first connection ribs 310ad extend in opposite directions, the two second beams 310b include second connection ribs 310bd, the two second connection ribs 310bd extend in opposite directions, and the first rotating assembly 32 is connected with each first connection rib 310ad and each second connection rib 310bd together, so as to increase the connection strength.

Referring to fig. 8, fig. 8 is an enlarged view of the B portion of fig. 6.

In one embodiment, the first rotating assembly 32 includes a bearing 320, a rotating shaft 321 in interference fit with the bearing inner race, and a sleeve 322 in interference fit with the bearing outer race. Wherein, the sleeve 322 is fixedly connected with the first connecting rib 310ad and the second connecting rib 310 bd. The lower end of the rotating shaft 321 extends out of the sleeve 322 and is connected to the suspension structure 217 of the bearing assembly 21. In one embodiment, the lower end of the rotating shaft 321 is provided with a connecting hole 321a, the connecting piece 218 passes through the lug holes of the first lifting lug 217a and the second lifting lug 217b and the connecting hole 321a at the lower end of the rotating shaft 321, and the rotating shaft 321 is fixedly connected or hinged with the hanging structure 217, and the connecting piece 218 can be a bolt or a fixing pin.

The bearings 320 may be provided with a plurality of groups, and the plurality of groups of bearings 320 may realize multi-point support to the rotation shaft 321, so as to ensure flexibility of rotation of the rotation shaft 321. Groups of bearings 320 may be separated by spacers 323. The first rotating assembly 32 may further include an upper end cap 324 and a lower end cap 325, the upper end cap 324 and the lower end cap 325 clamping the bearing 320 along the axial direction of the rotating shaft 321, preventing the bearing 320 from moving axially. In this embodiment, the sleeve 322 is provided separately from the upper end cap 324, and the sleeve 322 is provided integrally with the lower end cap 325.

Referring to fig. 1 and 6, the tower further includes a spacing assembly 40 disposed at the bottom of the liquid damper 20. The limiting assembly 40 includes a limiting bracket 41 and a second rotating assembly 42 disposed on the limiting bracket 41. Wherein, spacing support 41 is connected, and liquid damper 20 is connected with second rotating member 42, and first rotating member 32 is coaxial with second rotating member 42. The limiting assembly 40 may be used to limit the displacement of the bottom of the liquid damper 20 and reduce the sloshing of the liquid damper 20 under external load.

The limiting brackets 41 may be provided with a plurality of groups, and the plurality of groups of limiting brackets 41 are respectively connected with the tower body 10 and the second rotating assembly 42 to jointly support the second rotating assembly 42. In this embodiment, the limiting brackets 41 are provided with two groups and are arranged in a vertical manner.

The first rotating assembly 32 is coaxially disposed with the second rotating assembly 42, the first rotating assembly 32 is disposed at the top of the liquid damper 20, and the second rotating assembly 42 is disposed at the bottom of the liquid damper 20. When the tower vibrates under an external load, the liquid damper 20 rotates about the axis of the first and second

rotating assemblies

32 and 42 according to the vibration direction. The first rotating member 32 and the second rotating member 42 are formed as a single rotating body, and the liquid damper 20 is connected to the first rotating member 32 and the second rotating member 42, and the liquid storage tank 22 passively adjusts the working direction according to the external vibration direction so that the longitudinal direction of the tank 220 is consistent with the external vibration direction. The vibration direction of the tower can be any direction of 0-360 degrees under the combined action of the loads such as random wind, wave ocean currents and the like.

Referring to fig. 9, fig. 9 is an enlarged view of the C portion of fig. 6.

In one embodiment, second rotating assembly 42 includes a sleeve 420 and a rotating sleeve 421 that is disposed about sleeve 420. The shaft sleeve 420 is fixedly connected to the lower end of the bearing assembly 21, and the rotating sleeve 421 and the shaft sleeve 420 can rotate relatively. The limit bracket 41 is respectively connected with the rotary sleeve 421 and the tower body 10.

The limiting bracket 41 and the rotating sleeve 421 may be fixedly connected or hinged, in this embodiment, the rotating sleeve 421 includes a first connecting lug 421a disposed on a side wall, the limiting bracket 41 includes a second connecting lug 41a, and the first connecting lug 421a and the second connecting lug 41a may be fixedly connected by a bolt or hinged by a pin.

The limiting assembly 40 further includes a baffle 422, where the baffle 422 may be bolted to the bottom of the sleeve 420 to prevent the rotating sleeve 421 from axially disengaging from the sleeve 420.

Referring to fig. 6 and 9, the limiting bracket 41 includes a first limiting bracket 410 and a second limiting bracket 412 that are separately disposed, the first limiting bracket 410 and the second limiting bracket 412 each include a second connecting ear 41a, and the rotating sleeve 421 includes two first connecting ears 421a disposed on the side wall, where the first connecting ears 421a are connected with the second connecting ears 41a in a one-to-one correspondence manner.

The limiting assembly 40 includes a third connecting member 43, the first limiting bracket 410 is connected with the tower body 10 through the third connecting member 43, and/or the second limiting bracket 412 is connected with the tower body 10 through the third connecting member 43. The third connecting piece 43 may be welded to the metallic tower body 10 or embedded in the concrete sleeve body 10. The first limiting bracket 410 may be fixedly connected or hinged with the third connecting member 43, and/or the second limiting bracket 412 may be fixedly connected or hinged with the third connecting member 43.

Referring to fig. 1, 6 and 9, the entire load of the liquid damper 20 can be transmitted to the tower body 10 through the first connector 314, the fixed mount 315 and the third connector 43. The tower further comprises a platform 50, the platform 50 being connected to the tower body 10 and being arranged below the liquid damper 20, serving as a platform for maintenance and operation.

It should be noted that the specific structure of the suspension assembly 30 and the spacing assembly 40 is not limited to that shown in fig. 1, nor is the first and second

rotational assemblies

32 and 42 limited to that shown in fig. 8 and 9. In other embodiments, there are other alternative embodiments of the suspension assembly 30, the stop assembly 40, the first rotating assembly 32, and the second rotating assembly 42.

The foregoing description of the preferred embodiments of the present invention is not intended to limit the invention to the precise form disclosed, and any modifications, equivalents, improvements and alternatives falling within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A tower of a wind turbine generator system, comprising:

a tower body;

the liquid damper is arranged in the tower cylinder body and comprises a plurality of liquid storage tanks and a bearing assembly for bearing the liquid storage tanks, and the liquid storage tanks are consistent in longitudinal direction;

the suspension assembly comprises a suspension bracket and a first rotating assembly arranged on the suspension bracket, the suspension bracket is connected with the tower body, the liquid damper is connected with the first rotating assembly, the liquid damper can rotate relative to the tower body, and the rotating shaft of the first rotating assembly is parallel to the height direction of the tower.

2. The tower of claim 1, wherein the suspension bracket comprises a bracket body and a plurality of links, each of the links being respectively coupled to the tower body and the bracket body, the first rotating assembly being disposed in the bracket body.

3. The tower of claim 2, wherein the bracket body includes a fixed mounting portion fixedly connected to the tower body and/or the first rotating assembly is disposed at a midpoint of the bracket body.

4. A tower according to any of claims 1 to 3, further comprising a stop assembly provided at the bottom of the liquid damper, the stop assembly comprising a stop bracket and a second rotating assembly provided at the stop bracket, the stop bracket being connected to the tower body, the liquid damper being connected to the second rotating assembly, the first rotating assembly being coaxial with the second rotating assembly.

5. The tower according to claim 1, wherein the reservoir comprises a tank for storing damping fluid, the ratio of the maximum longitudinal dimension of the orthographic projection of the tank in the horizontal plane to the maximum transverse dimension being greater than 1.

6. The tower of claim 5, wherein the ratio of the maximum longitudinal dimension to the maximum transverse dimension ranges from 3 to 10.

7. The tower of claim 5, wherein the housing comprises a first housing section and a second housing section disposed longitudinally at each end of the first housing section, the first housing section having a minimum cross-sectional area that is less than the minimum cross-sectional area of the second housing section.

8. The tower of claim 7, wherein the housing includes a bottom plate and a top plate, the top plate including a recessed portion recessed to one side of the bottom plate, the first housing section including the recessed portion.

9. The tower of claim 8, wherein the recessed portion includes a sloped portion that extends obliquely toward the floor in a direction from the second tank section toward the first tank section.

10. The tower of claim 8, wherein at least one end of the bottom plate in the longitudinal direction is tilted toward a side proximate the top plate.

11. The tower according to claim 10, wherein the reservoir comprises a support rib protruding outside the housing, the support rib protruding from the recessed portion, and/or the raised portion of the bottom plate.

12. A tower according to any of claims 7 to 11, wherein the second tank sections are symmetrically arranged at both longitudinal ends of the first tank section.

13. A tower according to any of claims 1 to 3, 5 to 11, wherein the carrying assembly comprises an outer frame of a grid structure and stops provided within the outer frame, the space within the outer frame being divided into a plurality of sub-spaces by the stops, at least one of the sub-spaces having the reservoir disposed therein.

14. The tower according to claim 13, wherein a plurality of said tanks are vertically stacked within at least one of said subspaces.

15. The tower according to claim 13, wherein at least two of said subspaces are arranged in an upper and lower layer, said liquid storage tanks being arranged in at least two of said subspaces arranged in an upper and lower layer; and/or

16. The tower of claim 13, wherein the bearing assembly includes a pressure block disposed on top of the outer frame, the pressure block being biased against the reservoir, and/or

17. A tower according to any of claims 1 to 3, 5 to 11, wherein the carrying assembly comprises a suspension structure for suspension within a tower of a wind power plant.