CN113531024A

CN113531024A - Liquid damper and tower barrel of wind generating set

Info

Publication number: CN113531024A
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: 2021-10-22
Anticipated expiration: 2040-04-16
Also published as: CN113531024B

Abstract

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

Description

Liquid damper and tower barrel 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

The vibration or swing of the wind generating set caused by random wind, wave ocean current, unbalance of transmission components and the like can have adverse effects on the safety and the service life of the wind generating set. Especially, the all-steel high tower cylinder or the offshore single-pile foundation tower cylinder has large power and long blades, and is subjected to the comprehensive action of loads such as random wind, wave ocean current and the like, so that the vibration and fatigue of the tower cylinder cannot be ignored. Therefore, damping vibration and reducing fatigue loads 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 is applied to a tower of a wind generating set, and comprises:

a plurality of liquid storage tanks; 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 body comprises a first box body section and a second box body section which is arranged at two ends of the first box body section along the longitudinal direction, and the area of the minimum cross section of the first box body section is smaller than that of the minimum cross section of the second box body section.

In one embodiment, the box includes a bottom panel and a top panel, the top panel including a recessed portion recessed to one side of the bottom panel, the first box section including 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 longitudinal end of the bottom plate is tilted to a side close to the top plate.

The utility model provides an embodiment, the liquid reserve tank include the protrusion set up in the outer brace rod of box, the brace rod protrusion is located the depressed part, and/or the portion of the perk of bottom plate.

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

The utility model provides an embodiment, bearing assembly includes the outer frame of grid structure and locates lattice block in the outer frame, space in the outer frame passes through lattice block divides into a plurality of subspaces, at least one place in the subspace the liquid reserve tank.

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

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

At least two of the subspaces have been placed the liquid reserve tank, the liquid reserve tank is in at least two the subspace places in parallel.

In one embodiment, the bearing assembly comprises a pressing block arranged at the top of the outer frame, the pressing block is pressed 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 the two longitudinal ends of the liquid storage tank.

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

A tower of a wind turbine generator system, comprising:

a tower barrel body;

the liquid damper as claimed in any preceding claim, 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.

An embodiment, the suspension bracket includes a bracket body and a plurality of connecting rods, each connecting rod is respectively connected with the tower cylinder body and the bracket body, and the first rotating assembly is disposed on the bracket body.

In one embodiment, the bracket 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 the center of the bracket body.

According to the embodiment, the tower drum further comprises a limiting assembly arranged at the bottom of the liquid damper, the limiting assembly comprises a limiting support and a second rotating assembly arranged on the limiting support, the limiting support is connected with the tower drum body, the liquid damper is connected with the second rotating assembly, and the first rotating assembly is coaxial with the second rotating assembly.

The technical scheme provided by the application can achieve the following beneficial effects:

the application provides a liquid damper and wind generating set's tower section of thick bamboo, liquid damper is applied to wind generating set's tower section of thick bamboo, including bearing component and a plurality of liquid reserve tanks including bearing. The liquid damper can effectively restrain the vibration of the tower drum and reduce the fatigue load of the tower drum, improve the running safety of the unit and prolong the service life of the unit.

Drawings

FIG. 1 is a schematic illustration of a partial structure of a tower of a wind turbine generator system according to an exemplary embodiment of the present disclosure;

FIGS. 2 to 4 are schematic views of different embodiments of a reservoir in a fluid damper provided herein;

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

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

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

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

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

Detailed Description

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

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this application belongs. The use of "first," "second," and similar terms in the description and claims of this application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of 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 "a number" means two or more. Unless otherwise specified, "front", "back", "lower" and/or "upper", "top", "bottom", and the like are for ease of description only and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

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

The embodiment of the application provides a tower cylinder (hereinafter referred to as tower cylinder) of a wind generating set, which comprises a tower cylinder body 10 and a liquid damper 20 installed in the tower cylinder body 10. In one embodiment, the liquid damper 20 may be suspended inside 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, each liquid storage tank 22 stores damping liquid, and when the tower tube vibrates (e.g., swings) under the action of an external load, the damping liquid in the liquid storage tanks 22 moves in the opposite direction of the vibration direction under the action of inertia, so as to inhibit the vibration, thereby achieving the purpose of vibration reduction and damping.

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

The specific arrangement of the plurality of oil reservoirs 22 arranged in the vertical direction is not limited. In one embodiment, multiple 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 touching. In another embodiment, a plurality of reservoirs 22 are stacked with a portion of the reservoirs 22 being spaced apart from one another. Wherein the specific number of the stacked oil reservoirs 22 is not limited, and the specific number of the oil reservoirs 22 spaced apart from each other 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 in the vertical direction. In each row, the two reservoirs 22 in the middle are separated by the partition plate 214, the reservoirs 22 above the partition plate 214 overlap, and the reservoirs 22 below the partition plate 214 overlap. The number of reservoirs 22 above the partition 214 is equal to the number of reservoirs 22 below the partition 214.

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

The reservoir 22 includes a tank 220 for storing damping fluid. In one embodiment, the ratio of the maximum longitudinal (X-direction in the figure) dimension to the maximum transverse (Y-direction in the figure) dimension of the orthographic projection of the housing 220 in the horizontal plane (XY-plane) is greater than 1. The case 220 with the aspect ratio larger than 1 is adopted, so that the case 220 can be conveniently put into and taken out of the tower body 10, and the liquid storage tank 22 can be conveniently maintained. Of course, in the liquid storage tank 22 shown in fig. 2 and 4, the dimension of the box 220 in the thickness direction (Z direction in the drawing) needs to be considered to avoid interference with the tower body 10.

The specific shape of the box 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 after the filling is completed, the tank is sealed by an end cap.

In one embodiment, the ratio of the maximum longitudinal dimension to the maximum transverse dimension of the housing 220 in an orthographic projection in a horizontal plane (XY plane) is in a range of 3-10. 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 may be used. Further, the ratio of the maximum longitudinal dimension to the maximum transverse dimension may range from 4 to 6. Such as 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 transverse dimension of the tank 220 is gradually increased, the maximum longitudinal dimension of the tank 220 is gradually increased, and the longitudinal filling depth is also increased, the number of the liquid tanks 22 in the liquid damper 20 can be correspondingly reduced.

In practical applications, 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 a tower tube vibrates, the damping fluid impacts the side wall of the box body 220 due to inertia reverse flow, and if enough space is reserved in the box body 220, the damping fluid can generate enough kinetic energy in the process of reverse flow, so that the effective mass of the damping fluid is increased, and the effect of inhibiting vibration is better. On the other hand, when one of the tanks 220 is failed, the damping fluid in the failed tank 220 can be temporarily pumped into the other tank 220, and then the tank 220 after replacement can be pumped back, so that the failed tank 220 can be conveniently maintained.

The liquid damper 20 provided in the embodiment of the present application employs the liquid storage tank 22 shown in fig. 4. Of course, in other embodiments, the fluid damper 20 may also be used with the reservoir 22 shown in fig. 2 and 3.

In the embodiment shown in fig. 4, the tank 220 includes a first tank section 220a and second tank sections 220b provided at both ends of the first tank section 220a in the longitudinal direction, respectively. Wherein the area of the smallest cross-section of the first tank segment 220a is smaller than the area of the smallest cross-section of the second tank segment 220 b. That is, the case 220 is a variable cross-section case, and has a small cross-section at the middle portion and large cross-sections at both ends. When the tower cylinder vibrates violently or has large amplitude, the flow form of the damping fluid is mostly turbulent, and the first tank section 220a has a small cross-sectional area, so that the damping fluid at the position passes through a small amount, and the effect of limiting the turbulent flow can be achieved. On the contrary, when the tower vibrates slightly or has small amplitude, the flow pattern of the damping fluid is mostly laminar, and the first tank body section 220a with a small cross section does not obstruct the laminar flow.

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

The specific structure of the concave portion 223a is not limited. For example, the concave portion 223a may be provided as a curved surface concave structure, and may also be provided as an inclined surface concave structure. In this example, the latter is employed. Specifically, the concave portion 223a includes an inclined portion 223b, and the inclined portion 223b extends obliquely toward the bottom plate 222 from the second tank section 220b toward the first tank section 220a, forming a downward inclination 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 tank segments 220b toward the first tank segment 220a, the second inclined portion 223bb is inclined downward toward the bottom plate 222 from the other second tank segment 220b toward the first tank segment 220a, and the first inclined portion 223ba is contiguous with the second inclined portion 223 bb. In the present embodiment, the first inclined portion 223ba and the second inclined portion 223bb are transitionally connected by the transition portion 223 bc. The transition 223bc may be parallel to the bottom plate 222. The inclined surface depression structure makes the arrangement of the depression part 223a simpler, and facilitates the processing and manufacturing of the case 220.

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

The reservoir 22 further includes a support rib 224 protruding from the housing 220, the support rib 224 protruding from the concave portion 223a, and/or the support rib 224 protruding from the raised portion of the bottom plate 222. The support ribs 224 may increase the contact area between the reservoir 22 and the carrier 21, so that the reservoir 22 is more stable in the carrier 21. In addition, the support ribs 224 may also allow a plurality of stacked reservoirs 22 to achieve more contact and more stable support with each other.

The support rib 224 may be provided in plurality, and a 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 the lateral direction of the box 220. Alternatively, the plurality of support ribs 224 includes a longitudinal support rib and a transverse support rib, which are disposed to cross each other. In the embodiment shown in fig. 4, the concave portion 223a is provided with a plurality of support ribs 224 extending in the longitudinal direction of the case 220, parallel to 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 tank 220 may also be provided in a symmetrical structure, for example, the second tank section 220b is symmetrically provided at both longitudinal ends of the first tank section 220 a. The box 220 may be made of industrial plastic by blow molding, or the box 220 may be made of metal. The damping liquid can be prepared from water, a preservative, an 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 case 220 serves as a placement reference surface, so that the liquid damper 20 can suppress an external load by the longitudinal flow of the damping liquid in the case 220, using the longitudinal length of the case 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 a lattice-structured outer frame 210, and the outer frame 210 includes 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. The top plate 201b may be a mesh plate, but is not limited thereto. A plurality of posts 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 lattice 212, and the space inside the outer frame 210 is divided into a plurality of subspaces 210d by the lattice 212. The stopper 212 is disposed in the space of the outer frame 210, and is connected to the bottom plate 210a and the top plate 201 b. The specific structure of the block 212 is not limited, and for example, a plate-shaped block 212 may be used. In this embodiment, the bars 212 are rod-shaped structures, and a plurality of rod-shaped bars 212 are arranged at intervals to form a sub-space 210 d. The stops 212 may allow for a more regular, ordered arrangement of the reservoirs 22 within the outer frame 210.

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

In another embodiment, a plurality of liquid storage boxes 22 may be vertically stacked in at least one of the plurality of subspaces 210 d. That is, a plurality of liquid storage tanks 22 may be vertically stacked in one subspace 210d, or a plurality of liquid storage tanks 22 may be vertically stacked in a plurality of subspaces 210 d. The stacked state of the plurality of tanks 22 in the subspace 210d can be referred to fig. 6. In some embodiments, a plurality of liquid storage tanks 22 may be vertically stacked in a part of the subspaces 210d, and the number and arrangement of the liquid storage tanks 22 in the remaining subspaces 210d are not limited except for the subspaces 210d in which the plurality of liquid storage 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 upper and lower layers by the partition 214, so that the liquid storage tanks 22 may be placed in the at least two subspaces distributed according to upper and lower layers to form an arrangement manner arranged vertically. Specifically, the spacer 214 is horizontally disposed within the outer frame 210, and is connected to the pillar 210c and the barrier 212.

In the embodiment shown in fig. 5, one partition 214 is provided, the space inside the outer frame 210 is divided into upper and lower layers by the partition 214, and the partitions 212 are provided above and below the partition 214, and the upper and lower layers of space are divided into a plurality of sub-spaces by the partitions 212, respectively. In other embodiments, a plurality of the spacers 214 may be provided, and a plurality of the spacers 214 may be arranged at intervals along the vertical direction to divide the space inside the outer frame 210 into upper and lower layers.

The partition 214 partitions the sub-spaces 210d that pass through vertically, so that the number of the sub-spaces 210d is increased and the volume thereof is reduced. Thus, a smaller number of tanks 22 may be stacked or placed within the partitioned sub-spaces 210 d. If a reservoir 22 in one of the subspaces 210d fails, the failed reservoir 22 in that subspace 210d may be individually removed, with less impact on the reservoirs 22 in the other surrounding subspaces 210d, and ease of operation and removal.

The arrangement of the partition 214 and the barrier 212 is not limited to the above description. For example, in other embodiments, the stops 212 may be disposed only above the partitions 214, or the stops 212 may be disposed only below the partitions 214. For another example, a smaller-sized partition may be used, and a part of the subspace 210d is divided into upper and lower layers by the smaller-sized partition, and the rest of the subspace 210d still remains to be through.

In one embodiment, among the plurality of subspaces 210d, the tanks 22, which may be disposed in at least two of the subspaces 210d, are parallel to each other. That is, the longitudinal directions of the reservoirs 22 in at least two of the sub-spaces are coincident. Of course, in other embodiments, the longitudinal directions of the reservoirs 22 in the two subspaces may be inclined relative to each other.

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

The bearing assembly 21 further includes a first stopper 216a and a second stopper 216b disposed at the side portion of the outer frame 210, and the first stopper 216a and the second stopper 216b are respectively stopped at two longitudinal ends of the liquid storage tank 22 for limiting the degree of freedom of the liquid storage tank 22 along the longitudinal direction thereof. The first stopper 216a and the second stopper 216b may be protruded on the upper surface of the bottom plate 210a for the lower subspace 210d, and the first stopper 216a and the second stopper 216b may be protruded on the upper surface of the barrier 214 for the upper subspace 210 d. It should be understood that the securing structure for securing the reservoir 22 within the carrier assembly 21 is not limited to the above-described pressing block 215, first stop 216a and second stop 216b, but numerous other embodiments are possible.

The carrier assembly 21 further comprises a suspension structure 217, and the suspension structure 217 is disposed on top of the outer frame 210, and can be fixedly connected or hinged with the top plate 210 b. Suspension structure 217 is used to connect with suspension assembly 30 such that liquid damper 20 is suspended within the tower of the wind turbine.

In one embodiment, suspension structure 217 includes a lifting lug. One or more lifting lugs may be provided, and in this embodiment, the lifting lug includes 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 jointly connected with the suspension assembly 30. The first and

second lifting eyes

217a and 217b may be connected to the suspension assembly 30 by a connecting member 218 disposed in the lifting eye hole, and the connecting member 218 may be a fixing pin or a bolt. The embodiments of the suspension structure 217 are numerous and not limited to the shackle shown in figure 5.

Referring to FIG. 6, FIG. 6 is a cross-sectional view of a portion of the structure of the tower shown in FIG. 1.

In the embodiment shown in fig. 6, the space inside the outer frame 210 is divided into upper and lower two layers by the partition 214, the upper layer space is divided into four subspaces 210d by the barriers 212, and the lower layer space is divided into four subspaces 210d by the barriers 212, forming eight subspaces 210d in total. Each of the subspaces 210d overlaps a plurality of the reservoirs 22, the bottom surface of the upper reservoir 22 is supported on the support rib 224 of the recessed 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 the respective subspaces 210d are parallel to each other, and the longitudinal directions of the respective tanks 220 are uniform. When the tower vibrates under the action of an external load, the damping liquid in each box body 220 flows towards the direction opposite to the vibration direction, and because the longitudinal directions of the box bodies 220 are consistent, acting forces generated when the damping liquid in each box body 220 collides with the side wall of the box body 220 can form resultant force to drive the liquid damper 20 to rotate together, so that the effective mass of the damping liquid for damping the vibration of the liquid damper 20 is increased, and the damping and vibration damping effects can be more effectively achieved.

Referring to FIG. 1, the liquid damper 20 is suspended within the 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. The suspension bracket 31 is connected to the tower body 10, and the liquid damper 20 is connected to the first rotating assembly 32 and rotates relative to the tower body 10. Since the liquid damper 20 can rotate relative to the tower body 10, when the tower vibrates under the action of an external load, the damping liquid in the liquid damper 20 moves in the opposite direction to the vibration direction under the action of inertia, and the movement of the damping liquid impacts the side wall of the liquid storage tank 22 to apply a force to the liquid storage tank 22. When the movement direction of the damping liquid forms an included angle with the longitudinal direction of the liquid storage tank 22, the acting force of the damping liquid on the side wall of the liquid storage tank 22 enables 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 direction of the acting force of the damping force on the tank body 220. The response process of the liquid damper 20 to tower vibration is a process of suppressing and counteracting external loads acting on the tower. If the tower drum continuously vibrates, the damping liquid can continuously flow in the opposite direction, and damping force is continuously generated to inhibit vibration. Therefore, by adopting the suspended and rotatable liquid damper 20, the liquid damper 20 can automatically rotate 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 suppress the vibration of the tower.

The present application is not limited to the specific structure of the suspension bracket 31. In the embodiment shown in fig. 1, the suspension bracket 31 includes a bracket body 310 and a plurality of links 312, and each link 312 is connected to the tower body 10 and the bracket body 310. The connecting rod 312 and the bracket body 310 may be fixedly connected or hinged. The connecting rod 312 may be fixedly connected or hinged with the tower body 10, and in one embodiment, the connecting rod 312 may be connected with the tower body 10 through a 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 member 314 and the connecting rod 312 are respectively provided with a connecting hole, and a fastening member penetrates into the connecting hole to be locked and fixed. The first connecting member 314 may be welded to the tower body 10 made of metal, or embedded in the tower body 10 made of concrete. The specific number of the connecting rods 312 is not limited, and in this embodiment, there are eight connecting rods 312, and the connecting points of the connecting rods 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 perpendicularly intersect, and the first beam 310a is fixedly connected to the second beam 310b at the intersection point. The specific number of the first and

second beams

310a and 310b is not limited. The bracket body 310 may include more than two first beams 310a and/or more than two second beams 310 b. In this embodiment, there are two first beams 310a, 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 be hollow beams 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 and 310ac connected to both ends of the middle section 310ab, and the links 312 are connected to the outer sections 310aa and 310ac of the first beam 310a, respectively. The second beam 310b perpendicularly crosses the two first beams 310a, is divided into three sections including a middle section 310bb between the two first beams 310a and outer sections 310ba and 310bc connected to both ends of the middle section 310bb, and the connecting rods 312 are connected to the outer sections 310ba and 310bc of the second beam 310b, respectively. It should be understood that the stent body 310 is not limited to the structure shown in fig. 1.

Further, the bracket body 310 further includes a fixed mounting portion 315, and the fixed 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, each of the first and

second beams

310a, 310b includes a fixed mounting portion 315 and is fixedly coupled to the tower body 10 via the fixed mounting portion 315. In one embodiment, the fixing portion 315 may be welded to the tower body 10 made of metal, or embedded in the tower body 10 made of concrete. In one embodiment, the fixed mounting portion 315 may be configured as an inverted U-shaped plate, the U-shaped surface being connected to the tower body 10, and the first beam 310a and/or the second beam 310b being connected to the top surface of the fixed mounting portion 315.

The first rotating member 32 is disposed on the bracket body 31, for example, and is fixedly connected to the bracket body 31. In one embodiment, the first rotating member 32 may be disposed at the center of the bracket body 31. This allows the liquid damper 20 to be installed in the central region of the tower body 10, and avoids interference with the tower body 10 during rotation. In this 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 a portion a in fig. 1.

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

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

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

In one embodiment, the first rotating assembly 32 includes a bearing 320, a rotating shaft 321 that is interference fit with a bearing inner race, and a sleeve 322 that is interference fit with a bearing outer race. The sleeve 322 is fixedly connected to 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 carrier assembly 21. In one embodiment, the lower end of the rotating shaft 321 is provided with a connecting hole 321a, and the connecting member 218 passes through the lug holes of the first and

second lugs

217a and 217b and the connecting hole 321a at the lower end of the rotating shaft 321 to fixedly or hingedly connect the rotating shaft 321 with the suspension structure 217, and the connecting member 218 may be a bolt or a fixing pin.

The bearings 320 may be provided with a plurality of sets, and the plurality of sets of bearings 320 may support the rotating shaft 321 at multiple points, so as to ensure the flexibility of rotation of the rotating shaft 321. The sets 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, and the upper end cap 324 and the lower end cap 325 clamp the bearing 320 in the axial direction of the rotating shaft 321 to prevent the bearing 320 from moving in the axial direction. In this embodiment, the sleeve 322 and the upper end cap 324 are provided separately, and the sleeve 322 and the lower end cap 325 are provided integrally.

With reference to fig. 1 and 6, the tower further includes a limiting assembly 40 disposed at the bottom of the liquid damper 20. The limiting assembly 40 comprises a limiting bracket 41 and a second rotating assembly 42 arranged on the limiting bracket 41. Wherein, the limit bracket 41 is connected, the liquid damper 20 is connected with the second rotating assembly 42, and the first rotating assembly 32 is coaxial with the second rotating assembly 42. The position limiting assembly 40 can be used for limiting the displacement of the bottom of the liquid damper 20 and reducing the shaking of the liquid damper 20 under the action of external load.

The plurality of limiting brackets 41 may be provided, and the plurality 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, two sets of the limiting brackets 41 are provided 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 fluid damper 20 rotates about the axis of the first and second

rotating assemblies

32, 42 depending on the direction of vibration. The first rotating assembly 32 and the second rotating assembly 42 are formed as a rotating whole, the liquid damper 20 is connected with the first rotating assembly 32 and the second rotating assembly 42, and the working direction of the liquid storage tank 22 is passively adjusted according to the external vibration direction, so that the longitudinal direction of the tank body 220 is consistent with the external vibration direction. Under the comprehensive action of loads such as random wind, wave ocean current and the like, the vibration direction of the tower can be any direction of 0-360 degrees.

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

In one embodiment, the second rotating assembly 42 includes a shaft sleeve 420 and a rotating sleeve 421 sleeved outside the shaft sleeve 420. Wherein, 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 limiting bracket 41 is connected to the rotating sleeve 421 and the tower body 10.

The limit 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 the side wall, the limit 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 position limiting assembly 40 further comprises a baffle 422, and the baffle 422 can be connected to the bottom of the shaft sleeve 420 through bolts to prevent the rotating sleeve 421 from axially separating from the shaft sleeve 420.

With reference to fig. 6 and 9, the limiting bracket 41 includes a first limiting bracket 410 and a second limiting bracket 412 which are separately arranged, the first limiting bracket 410 and the second limiting bracket 412 both include a second engaging lug 41a, the rotating sleeve 421 includes two first engaging lugs 421a arranged on the side wall, and the first engaging lugs 421a are connected with the second engaging lugs 41a in a one-to-one correspondence manner.

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

Referring to FIGS. 1, 6 and 9, the entire load of the liquid damper 20 can be transmitted to the tower body 10 through the first connecting member 314, the fixed mount 315 and the third connecting member 43. The tower further comprises a platform 50, wherein the platform 50 is connected to the tower body 10 and disposed below the liquid damper 20, and is used as a platform for maintenance and operation.

It should be noted that the specific structure of the suspension assembly 30 and the limiting assembly 40 is not limited to that shown in fig. 1, and the first rotating assembly 32 and the second rotating assembly 42 are not limited to that shown in fig. 8 and 9. In other embodiments, there are other alternative embodiments for suspension assembly 30, limiting assembly 40, first rotating assembly 32, and second rotating assembly 42.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims

1. The utility model provides a liquid damper, its characterized in that is applied to wind generating set's tower section of thick bamboo, liquid damper includes:

a plurality of liquid storage tanks; and

the bearing assembly bears a plurality of liquid storage tanks.

2. The liquid damper as recited in claim 1, wherein the reservoir includes a tank body for storing the damping liquid, and a ratio of a maximum longitudinal dimension to a maximum transverse dimension of an orthographic projection of the tank body in a horizontal plane is greater than 1.

3. The liquid damper as recited in claim 2, wherein a ratio of the maximum longitudinal dimension to the maximum transverse dimension is in a range of 3-10.

4. The liquid damper as claimed in claim 2, wherein the case includes a first case section and a second case section provided at both ends of the first case section in the longitudinal direction, respectively, and the area of the minimum cross section of the first case section is smaller than the area of the minimum cross section of the second case section.

5. The liquid damper as recited in claim 4, wherein the case includes a bottom plate and a top plate, the top plate includes a recessed portion recessed to a side of the bottom plate, and the first case section includes the recessed portion.

6. The liquid damper as recited in claim 5, wherein the recessed portion includes an inclined portion that extends obliquely toward the bottom plate in a direction from the second tank section toward the first tank section.

7. The liquid damper as claimed in claim 5, wherein at least one end of the bottom plate in a longitudinal direction is tilted to a side close to the top plate.

8. The liquid damper as claimed in claim 7, wherein the liquid storage tank includes a support rib protruding from the outside of the tank, and the support rib protrudes from the recessed portion and/or the raised portion of the bottom plate.

9. The liquid damper as claimed in any one of claims 4 to 8, wherein the second case section is symmetrically disposed at both longitudinal ends of the first case section.

10. The liquid damper as claimed in any one of claims 1 to 8, wherein the carrier assembly includes an outer frame of a lattice structure and a barrier provided in the outer frame, a space in the outer frame is divided into a plurality of subspaces by the barrier, and the reservoir is placed in at least one of the subspaces.

11. The liquid damper as recited in claim 10, wherein a plurality of said reservoirs are vertically stacked within at least one of said subspaces.

12. The liquid damper as recited in claim 10, wherein at least two of the subspaces are arranged in an upper and lower layer, and the liquid storage tank is disposed in each of the at least two of the subspaces arranged in the upper and lower layer; and/or

13. The liquid damper as claimed in claim 1, wherein the bearing assembly comprises a pressing block disposed on the top of the outer frame, the pressing block is pressed against the liquid storage tank and/or the liquid damper

14. The liquid damper as recited in any one of claims 1 to 8, wherein the carrier assembly includes a suspension structure for suspension within a tower of a wind turbine generator system.

15. A tower of a wind generating set, comprising:

a tower barrel body;

the liquid damper as claimed in any one of claims 1 to 14, mounted within the tower body.

16. The tower of claim 15, wherein the tower includes a suspension assembly including a suspension bracket coupled to the tower body and a first rotational assembly disposed on the suspension bracket, wherein the fluid damper is coupled to the first rotational assembly for rotation relative to the tower body.

17. The tower of claim 16, wherein the suspension bracket includes a bracket body and a plurality of links, each link being coupled to the tower body and the bracket body, respectively, and the first rotating assembly is disposed on the bracket body.

18. The tower of claim 17, wherein the bracket body includes a fixed mounting portion fixedly connected to the tower body and/or the first rotational component is disposed substantially centrally of the bracket body.

19. The tower as claimed in any one of claims 15 to 18, further comprising a limiting assembly disposed at a bottom of the liquid damper, wherein the limiting assembly comprises a limiting bracket and a second rotating assembly disposed on the limiting bracket, the limiting bracket is connected to the tower body, the liquid damper is connected to the second rotating assembly, and the first rotating assembly is coaxial with the second rotating assembly.