CN115306658A - Method for inhibiting vortex-induced vibration in tower drum hoisting stage - Google Patents

Method for inhibiting vortex-induced vibration in tower drum hoisting stage Download PDF

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Publication number
CN115306658A
CN115306658A CN202210973875.4A CN202210973875A CN115306658A CN 115306658 A CN115306658 A CN 115306658A CN 202210973875 A CN202210973875 A CN 202210973875A CN 115306658 A CN115306658 A CN 115306658A
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CN
China
Prior art keywords
tower
spoiler
turbulence
rope
vortex
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Pending
Application number
CN202210973875.4A
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Chinese (zh)
Inventor
江鹏
韩佳
赵传凯
沙曼地
杨微
文茂诗
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CSIC Haizhuang Windpower Co Ltd
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CSIC Haizhuang Windpower Co Ltd
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Application filed by CSIC Haizhuang Windpower Co Ltd filed Critical CSIC Haizhuang Windpower Co Ltd
Priority to CN202210973875.4A priority Critical patent/CN115306658A/en
Publication of CN115306658A publication Critical patent/CN115306658A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
    • F03D13/20—Arrangements for mounting or supporting wind motors; Masts or towers for wind motors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/10—Influencing flow of fluids around bodies of solid material
    • F15D1/12—Influencing flow of fluids around bodies of solid material by influencing the boundary layer
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
    • F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
    • F16F15/10—Suppression of vibrations in rotating systems by making use of members moving with the system
    • F16F15/16—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material
    • F16F15/161—Suppression of vibrations in rotating systems by making use of members moving with the system using a fluid or pasty material characterised by the fluid damping devices, e.g. passages, orifices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/72—Wind turbines with rotation axis in wind direction
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00—Energy generation through renewable energy sources
    • Y02E10/70—Wind energy
    • Y02E10/728—Onshore wind turbines

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sustainable Energy (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Acoustics & Sound (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Wind Motors (AREA)

Abstract

The invention relates to the technical field of wind power generation, in particular to a method for inhibiting vortex-induced vibration in a tower drum hoisting stage, which comprises the following steps: obtaining the total height of the tower barrel; obtaining a preset number of spoiler block assemblies and ropes with preset lengths according to the total height of the tower; building a plurality of turbulence strips by each turbulence block assembly and a rope; and uniformly arranging the turbulence strips in a preset range of the tower barrel in a mode of suspending on the ground. The turbulence strips increase the turbulence degree of wind flowing through the tower drum, and disperse a large vortex structure in a flow field into a small vortex structure, so that a stable karman vortex street is difficult to form around the tower drum, and vortex-induced vibration is inhibited. The turbulence strips are installed in a mode of hanging on the ground, vortex-induced vibration of the tower can be effectively restrained, and the turbulence strips are simple to install and disassemble, low in cost and easy to popularize.

Description

Method for inhibiting vortex-induced vibration in tower drum hoisting stage
Technical Field
The invention relates to the technical field of wind power generation, in particular to a method for inhibiting vortex-induced vibration in a tower drum hoisting stage.
Background
When the wind turbine generator is in a hoisting stage, the blades lack rotation to disturb incoming wind, and an adverse pressure gradient exists on the leeward side of the section of the tower barrel under the action of the incoming wind. With the increase of Reynolds number, boundary layer separation occurs in the flow on the surface of the tower, and vortices which fall off alternately are generated on the leeward side of the tower, which is called Karman vortex street. The Karman vortex street enables the tower cylinder to be subjected to periodically changed pulsating pressure to force the tower cylinder to generate periodic vibration, the vibration of the tower cylinder can change a wake structure of the tower cylinder in turn, and the mutual coupling action between the fluid and the structure is called vortex-induced vibration.
When the wind speed is increased to a certain degree, the vortex shedding frequency is not changed along with the wind speed any more, but is equal to the first-order natural frequency of the tower, the phenomenon is the locking characteristic of vortex-induced vibration, and the corresponding wind speed is called as the critical wind speed. When the vortex-induced vibration is locked, the tower barrel resonates to generate vibration with large amplitude. The vortex-induced vibration amplifies the vibration of the unit, influences the site construction operation and even threatens the safety of the unit. The long-time vortex-induced vibration can consume the service life of the tower. Therefore, the suppression of the vortex-induced vibration of the tower drum has important significance for protecting the unit and prolonging the service life of the tower drum.
In the prior art, a method for suppressing the vortex-induced vibration of the tower drum is generally to install a damper inside the tower drum, wherein the damper can provide resistance to movement, consume movement energy and reduce vibration amplitude, but the cost for installing the damper is high, and the effect of suppressing the vortex-induced vibration of the tower drum is poor.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a method for inhibiting vortex-induced vibration in a tower drum hoisting stage, and the vortex-induced vibration of the tower drum is inhibited.
The technical scheme adopted by the invention is a method for inhibiting vortex-induced vibration in a tower drum hoisting stage.
In a first implementation, a method for suppressing vortex-induced vibration during a tower hoisting stage includes: obtaining the total height of the tower barrel; obtaining a preset number of spoiler block assemblies and ropes with preset lengths according to the total height of the tower; the flow disturbing block assemblies and the ropes are assembled into a plurality of flow disturbing strips; and uniformly arranging the turbulence strips in a preset range of the tower barrel in a mode of suspending on the ground.
In combination with the first implementation manner, in a second implementation manner, the rope and each spoiler assembly are assembled into a plurality of spoiler strips, including: each spoiler block assembly is connected in series into a plurality of spoiler strips through ropes, and the number of the spoiler strips is more than or equal to 4; each spoiler block component is tied with a knot, and a first preset length is arranged between each spoiler block component at intervals.
In combination with the first implementable manner, in the third implementable manner, each spoiler strip is evenly arranged in a preset range of the tower barrel in a manner of overhanging on the ground, and the method includes: mounting a plurality of tower top brackets on a flange at the top of the last tower barrel; fixing the top ends of the turbulence strips on the tower top brackets respectively; and the tail ends of the turbulence strips are respectively fixed on the ground through ground nails.
In combination with the first implementation manner, in a fourth implementation manner, the spoiler assembly is shaped like a regular triangular prism, and a channel is formed in the center of the spoiler assembly in the height direction and is used for allowing a rope to pass through.
In combination with the fourth implementable manner, in the fifth implementable manner, the center of the spoiler assembly is provided with a center cylinder in the height direction, and the center cylinder is connected with three quadrilateral sides of the regular triangular prism through square plates respectively.
In combination with the fourth implementable manner, in a sixth implementable manner, the spoiler assembly employs a light-weight, high-strength plastic or foamed polymer.
With reference to the fourth implementable manner, in a seventh implementable manner, the side length of the cross section of the regular triangular prism is 20cm to 50cm, and the height of the regular triangular prism is 50cm to 100cm.
With reference to the fourth implementable manner, in an eighth implementable manner, the diameter of the rope is smaller than that of the channel in the center of the spoiler block assembly, and the rope is hemp rope or nylon rope.
With reference to the third implementable manner, in a ninth implementable manner, the tower top support comprises a head portion, a tail portion and a middle portion; the head of the tower top support is in a sheet ring shape, three circular holes are formed in the sheet ring shape, and the tower top support is fixed on the tower barrel by screwing bolts into the circular holes and the flange at the top of the tower barrel; the tail part of the tower top support is provided with a circular ring, and a rope at the top of the turbulence strip penetrates through the circular ring to connect the turbulence strip with the tower top support; the middle part of the tower top bracket is in a strip shape, and two ends of the strip shape are respectively connected with the sheet ring at the head part and the circular ring at the tail part.
In combination with the first realizable mode, in a tenth realizable mode, one end of the ground nail is provided with a circular ring for tying the rope at the tail end of the turbulence strip, and the other end of the ground nail is sharp and is used for being nailed into the ground bottom; the ground nail is made of steel, and the length of the ground nail is 20 cm-30 cm; the inner diameter of the ring at one end of the ground nail is larger than the diameter of the rope.
According to the technical scheme, the beneficial technical effects of the invention are as follows:
1. the turbulence strips increase the turbulence degree of wind flowing through the tower drum, and disperse a large vortex structure in a flow field into a small vortex structure, so that a stable karman vortex street is difficult to form around the tower drum, and vortex-induced vibration is inhibited.
2. This scheme is through the mode installation vortex strip that hangs in ground, can not only effectively restrain the vortex induced vibration of a tower section of thick bamboo, and the installation of vortex strip, dismantlement are all comparatively simple moreover, and the cost is lower, is promoted easily.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings used in the detailed description or the prior art descriptions will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
FIG. 1 is a schematic structural diagram of a method for suppressing vortex-induced vibration in a tower hoisting stage according to the present invention;
FIG. 2-a is a front view of a spoiler arrangement in accordance with the present invention;
FIG. 2-b is a top view of a spoiler arrangement in accordance with the present invention;
FIG. 2-c is an isometric view of one spoiler arrangement provided by the present invention;
fig. 3-a is a schematic structural view of a first spoiler assembly according to the present invention;
FIG. 3-b is a schematic structural view of a second spoiler assembly according to the present invention;
FIG. 3-c is a schematic structural view of a third spoiler assembly according to the present invention;
FIG. 3-d is a schematic structural view of a fourth spoiler assembly according to the present invention;
FIG. 4 is a schematic view of the installation of the top end of a spoiler strip according to the present invention;
FIG. 5 is a schematic view illustrating an installation of a tail end of a spoiler in accordance with the present invention;
FIG. 6-a is a cloud view of the vortex amount at the rear part of the tower without the spoiler strips provided by the invention;
FIG. 6-b is a cloud view of the vortex shedding at the rear of the tower adopting the scheme provided by the invention;
FIG. 7-a is a graph of vortex-induced force over time for an unmounted spoiler provided in accordance with the present invention;
FIG. 7-b is a graph of vortex-induced force over time for the present invention;
FIG. 8 is a graph comparing frequency density curves for a tower of the present invention.
Reference numerals are as follows:
the method comprises the following steps of 1-tower barrel, 11-tower barrel top flange, 2-spoiler strips, 21-ropes, 22-spoiler block assemblies, 3-tower top support and 4-ground nails.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Referring to fig. 1, the present embodiment provides a method for suppressing vortex-induced vibration during a tower hoisting stage, including:
s01, obtaining the total height of the tower barrel;
s02, obtaining a preset number of spoiler block assemblies and ropes with preset lengths according to the total height of the tower;
s03, assembling each turbulence block assembly and a rope into a plurality of turbulence strips;
and S04, uniformly arranging the turbulence strips in a preset range of the tower barrel in a mode of suspending the turbulence strips on the ground.
Optionally, the rope and each spoiler block assembly are assembled into a plurality of spoiler strips, comprising: each spoiler block assembly is connected in series into a plurality of spoiler strips through ropes, and the number of the spoiler strips is more than or equal to 4; each spoiler block component is tied with a knot, and a first preset length is arranged between each spoiler block component at intervals.
Optionally, evenly lay each vortex strip in a tower section of thick bamboo in order to hang in the mode on ground within range is predetermine, include: mounting a plurality of tower top supports on a flange at the top of the last tower; fixing the top ends of the turbulence strips on the tower top brackets respectively; and the tail ends of the turbulence strips are respectively fixed on the ground through ground nails.
As shown in fig. 2-a, 2-b and 2-c, the top ends of the four turbulence strips 2 are fixed to the top of the tower barrel 1 through a tower top support, and the tail ends of the four turbulence strips 2 are fixed to the ground through ground nails, so that the four turbulence strips 2 are suspended around the tower barrel 1 of the wind turbine generator.
In some embodiments, the step of installing the spoiler comprises: and before the last tower drum is hoisted, four or more than four tower top supports are uniformly arranged around the flange at the top of the last tower drum. And calculating the length of the rope required by the spoiler strips and the number of spoiler block assemblies according to the total height of the tower. The spoiler block assemblies sequentially penetrate through the rope, and after each spoiler block assembly penetrates through one rope knot, a rope knot is tied to ensure that a gap with a first preset length is reserved between the spoiler block assemblies, so that the spoiler block assemblies are prevented from being overlapped together, and a plurality of spoiler strips are formed after the spoiler block assemblies are connected in series. One end of each turbulence strip is tied to the tower top support. And hoisting the turbulence strips together with the last section of tower barrel. After the hoisting is finished, the other end of the turbulence strip is fixed to the ground by using the ground nail, and then the installation of the turbulence strip can be finished.
In some embodiments, the step of detaching the spoiler comprises: before hoisting the cabin, evacuating personnel on the bottom surface, climbing to the top of the tower barrel by a professional, detaching the bolt for fixing the tower top support, downwards throwing down the turbulence strips, pulling out the ground nails, arranging and storing the turbulence strips, and finishing the detachment of the turbulence strips.
Four or more turbulence strips are arranged around the tower barrel in a suspension mode to inhibit vortex-induced vibration; the top end of the turbulence strip is fixed to the top of the tower barrel through the tower top support, and the tail end of the turbulence strip is fixed to the ground through the ground nail. The installation and the disassembly are very simple, the cost is lower, and the popularization is easy.
In some embodiments, four or more than four turbulence strips are uniformly distributed in the preset range of the tower barrel, each turbulence strip is close to the tower barrel and is vertical to the ground, one end of each turbulence strip is installed at the top of the tower barrel, and the other end of each turbulence strip is fixed on the ground. The turbulence strips can increase the turbulence degree of wind flowing through the tower barrel, and large vortex structures in the flow field are dispersed into small vortex structures, so that stable karman vortex streets are difficult to form around the tower barrel, vortex-induced vibration is inhibited, and the turbulence strips are relatively simple in installation and disassembly, low in cost and easy to popularize.
Optionally, the spoiler assembly is shaped as a regular triangular prism, and a channel is formed in the center of the spoiler assembly in the height direction and used for allowing a rope to pass through.
Optionally, a central cylinder is arranged at the center of the spoiler assembly in the height direction, and the central cylinder is connected with three quadrilateral side faces of the regular triangular prism through square plates.
In some embodiments, the structure of the spoiler assembly is as shown in fig. 3, and the spoiler assembly has a triangular prism shape. In the schematic structural view of the spoiler assembly shown in fig. 3-a, the triangular prism is composed of three quadrilateral sides and two triangular cross sections, and a circular hole is formed in the center of each triangular cross section and can pass through a rope. In the schematic structural diagram of the spoiler block assembly shown in fig. 3-b, the triangular prism body includes three quadrilateral side surfaces, a central cylinder is arranged at the center of the triangular prism body along the height direction, and the side surfaces of the central cylinder are vertically connected to the inner walls of the three quadrilateral side surfaces of the triangular prism body through three square plates. In the schematic structural diagram of the spoiler assembly shown in fig. 3-c, the triangular prism includes three quadrilateral side surfaces, a central cylinder is disposed at the center of the triangular prism along the height direction, and the side surface of the central cylinder is connected to the inner wall side edge line of the triangular prism through three square plates. In the schematic structural diagram of the spoiler assembly shown in fig. 3-d, the triangular prism is composed of three quadrilateral sides and two triangular cross sections, connecting lines between each side of the triangular cross section and the quadrilateral sides are located on the inner walls of the quadrilateral sides and are lower than the short sides of the quadrilateral sides, protruding rings are arranged at the centers of the two triangular cross sections, and a rope can pass through the two rings.
Optionally, the spoiler assembly is a lightweight, high strength plastic or foamed polymer.
Optionally, the side length of the triangular cross section of the regular triangular prism is 20 cm-50 cm, and the height of the regular triangular prism is 50 cm-100 cm.
Optionally, the diameter of the rope is smaller than that of the channel in the center of the spoiler block assembly, and the rope is hemp rope or nylon rope.
In some embodiments, a tether is used to connect a plurality of spoiler assemblies in series to form a spoiler. The diameter of the rope is slightly smaller than the diameter of the central circular hole of the spoiler block component. The rope can be hemp rope or nylon rope.
Optionally, the tower top mount comprises a head, a tail and a middle; the head of the tower top support is in a sheet ring shape, three circular holes are formed in the sheet ring shape, and the tower top support is fixed on the tower barrel by screwing bolts into the circular holes and the flange at the top of the tower barrel; the tail part of the tower top support is provided with a circular ring, and a rope at the top end of the turbulence strip penetrates through the circular ring to connect the turbulence strip with the tower top support; the middle part of the tower top bracket is in a strip shape, and two ends of the strip shape are respectively connected with the sheet ring at the head part and the circular ring at the tail part.
Referring to fig. 4, in some embodiments, the tower 1 is provided with a tower top bracket 3 at the top, one end of the tower top bracket 3 is fixed on the tower top flange 11 by bolts, and the other end of the tower top bracket 3 is suspended with a spoiler, which includes a rope 21 and a spoiler assembly 22. The form of the tower top support is based on the principle of firm and convenient assembly and disassembly.
Optionally, one end of the ground nail is provided with a circular ring, the diameter of the circular ring is 1 cm-2 cm, the circular ring is used for tying a rope at the tail end of the turbulence strip, and the other end of the ground nail is sharp and used for being nailed into the ground bottom; the ground nail is made of steel, and the length of the ground nail is 20 cm-30 cm; the inner diameter of the ring at one end of the ground nail is larger than the diameter of the rope.
As shown in connection with fig. 5, in some embodiments, the tether 21 connects the spoiler assemblies 22 in series, forming a spoiler strip. The tail end of the rope 21 penetrates through the last spoiler block assembly 22, and then a knot is tied, and a length is reserved. The reserved rope is tightly tied after passing through the circular ring of the ground nail 4, and then the sharp end of the ground nail is nailed into the ground, so that the tail end of the turbulence strip is fixed on the ground.
In some embodiments, the outer flow field analysis is respectively performed on two situations of the tower drum of the wind turbine generator and the tower drum without the turbulence bars, wherein the two situations are that the tower drum of the wind turbine generator and the tower drum without the turbulence bars are used for restraining the vortex-induced vibration in the tower drum hoisting stage. Fig. 6 is a vortex shedding cloud picture of the cross section of the same height of the tower under two conditions, fig. 6-a is a vortex shedding cloud picture of the rear part of the tower without the spoiler, and fig. 6-b is a vortex shedding cloud picture of the rear part of the tower implementing the scheme. FIG. 7 is a graph plotting the resultant force of vortex-induced forces over 1m of the same height of the surface of the tower for time under two conditions; fig. 7-a is a graph of the time-dependent variation of the vortex-induced force without the spoiler, and fig. 7-b is a graph of the time-dependent variation of the vortex-induced force in the embodiment of the present invention. FIG. 8 is a graph comparing frequency density curves plotted from spectral analysis of vortex-induced force data for two cases; the dotted line is a frequency density curve without the turbulence strips, and the solid line is a frequency density curve of the implementation scheme. As can be seen from comprehensive comparison of fig. 6, 7 and 8, after the turbulence strips are arranged around the tower drum by using the method for suppressing vortex-induced vibration in the tower drum hoisting stage provided by the scheme, the formation of periodic karman vortex streets at the rear part of the tower drum can be suppressed, so that the shedding frequency of the vortex structure becomes chaotic; and the vortex-induced force on the surface of the tower drum is reduced by about 25 percent, so that the vortex-induced vibration is inhibited, and the probability of the vortex-induced vibration of the tower drum is reduced.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (10)

1. A method for suppressing vortex-induced vibration in a tower hoisting stage, comprising:
obtaining the total height of the tower barrel;
obtaining a preset number of spoiler block assemblies and ropes with preset lengths according to the total height of the tower;
building a plurality of turbulence strips by the turbulence block assemblies and the ropes;
and uniformly arranging the turbulence strips in a preset range of the tower barrel in a mode of suspending on the ground.
2. The method of claim 1, wherein assembling the rope and each of the spoiler block assemblies into a plurality of spoiler bars comprises:
each turbulence block assembly is connected in series through the rope to form a plurality of turbulence strips, and the number of the turbulence strips is more than or equal to 4; each spoiler block component is tied with a knot, and a first preset length is arranged between each spoiler block component.
3. The method of claim 1, wherein the uniformly distributing the spoiler strips within a predetermined range of the tower in a manner of suspending from the ground comprises:
mounting a plurality of tower top brackets on a flange at the top of the last tower barrel;
respectively fixing the top ends of the turbulence strips on the tower top supports;
and respectively fixing the tail ends of the turbulence strips on the ground through ground nails.
4. The method of claim 1, wherein the spoiler assembly has a regular triangular prism shape, and a passage for passing a rope is provided at a center of the spoiler assembly in a height direction.
5. The method of claim 4, wherein a center of the spoiler assembly is provided with a center cylinder in a height direction, the center cylinder being connected with three quadrangular side surfaces of the regular triangular prism through square plates, respectively.
6. The method of claim 4, wherein the spoiler assembly comprises a lightweight, high strength plastic or foamed polymer.
7. The method as claimed in claim 4, wherein the regular triangular prism has a side length of a cross section of 20cm to 50cm and a height of 50cm to 100cm.
8. The method of claim 4, wherein the diameter of the rope is less than the diameter of the channel in the center of the spoiler assembly, and the rope is hemp rope or nylon rope.
9. The method of claim 3, wherein the overhead support comprises a head portion, a tail portion, and a middle portion;
the head of the tower top support is in a sheet ring shape, three circular holes are formed in the sheet ring, and the tower top support is fixed on the tower barrel by screwing bolts into the circular holes and the flange at the top of the tower barrel;
the tail part of the tower top support is a circular ring, and a rope at the top end of the turbulence strip penetrates through the circular ring to connect the turbulence strip with the tower top support;
the middle part of the tower top support is in a long strip shape, and two ends of the long strip shape are respectively connected with the sheet ring shape of the head part and the circular ring shape of the tail part.
10. The method as claimed in claim 3, wherein one end of the ground nail is provided with a ring for tying the rope at the tail end of the spoiler, and the other end of the ground nail is sharp for driving into the ground; the ground nail is made of steel, and the length of the ground nail is 20-30 cm; the inner diameter of the ring at one end of the ground nail is larger than the diameter of the rope.
CN202210973875.4A 2022-08-15 2022-08-15 Method for inhibiting vortex-induced vibration in tower drum hoisting stage Pending CN115306658A (en)

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Application Number Priority Date Filing Date Title
CN202210973875.4A CN115306658A (en) 2022-08-15 2022-08-15 Method for inhibiting vortex-induced vibration in tower drum hoisting stage

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210973875.4A CN115306658A (en) 2022-08-15 2022-08-15 Method for inhibiting vortex-induced vibration in tower drum hoisting stage

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CN115306658A true CN115306658A (en) 2022-11-08

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