CN112610061B - Turbulent flow energy dissipation device for inhibiting aeolian vibration of steel pipe tower rod piece - Google Patents
Turbulent flow energy dissipation device for inhibiting aeolian vibration of steel pipe tower rod piece Download PDFInfo
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- CN112610061B CN112610061B CN202011510903.6A CN202011510903A CN112610061B CN 112610061 B CN112610061 B CN 112610061B CN 202011510903 A CN202011510903 A CN 202011510903A CN 112610061 B CN112610061 B CN 112610061B
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
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- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
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- E—FIXED CONSTRUCTIONS
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- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
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Abstract
The invention discloses a turbulence energy consumption device for inhibiting the aeolian vibration of a steel pipe tower rod piece, which comprises a plurality of turbulence energy consumption units, wherein adjacent turbulence energy consumption units are connected through turbulence lines; the turbulent flow energy consumption units comprise fixing assemblies and turbulent flow energy consumption assemblies, the fixing assemblies are used for being fixed on the steel pipe tower rod pieces, the turbulent flow energy consumption assemblies comprise turbulent flow cylinders which are used for being sleeved on the outer sides of the fixing assemblies, guide wings are fixedly arranged on the side walls of the turbulent flow cylinders, and turbulent flow lines are connected between the guide wings of the adjacent turbulent flow energy consumption units.
Description
Technical Field
The invention belongs to the technical field of electric power construction, and particularly relates to a turbulence energy dissipation device for inhibiting aeolian vibration of a steel pipe tower rod piece.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The new infrastructure is the infrastructure construction of the advanced development science and technology end in seven fields of intercity high-speed railways, urban rail transit, extra-high voltage, 5G base station construction, new energy automobile charging piles, industrial internet, big data centers and artificial intelligence. The extra-high voltage is one of seven fields of new capital construction, and the power transmission tower structure is changing towards the direction of high rise and large span in recent years. The traditional angle steel iron tower can not meet the structural strength requirement of the power transmission tower, and the steel pipe structure is gradually and widely applied to lattice towers such as extra-high voltage power transmission towers due to the excellent bearing capacity and aerodynamic performance of the steel pipe structure.
However, in a common cross-sectional form, the strouhal number of a circular cross section is the largest, and some components on the steel tube tower, which have relatively large slenderness and tend to be horizontally arranged, are easy to generate vortex-induced resonance in a direction perpendicular to an incoming flow, and are called as 'breeze vibration' in engineering. This phenomenon occurs sometimes in practical engineering, and the continuous and repeated vibration may cause the connection bolt of the rod to loosen or the fatigue damage of the connection plate, threatening the safe operation of the power grid. At present, the research on the breeze vibration of the circular tube member is less, and therefore, it is urgently needed to take relevant measures to effectively reduce the occurrence of the phenomenon.
In the current only measure for preventing and treating the breeze vibration of the steel tube tower, two ideas are mainly provided: firstly, from the angle of improving the quality and rigidity of the rod piece, for example, the slenderness ratio is limited during design, concrete is poured in a horizontal steel pipe, and the like; and secondly, from the external turbulence energy consumption angle, if the discontinuous short ribs or the wound damping ropes are arranged along the direction of the rod piece, the middle point of the rod piece which generates the breeze vibration is provided with the inhaul cable, and the rubber gasket is additionally arranged at the connection position of the inserting plate. Compared with the former, the method increases the design cost and is not suitable for the defects of the in-service transmission tower, and the latter is a good choice.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a turbulence energy consumption device for inhibiting the aeolian vibration of a steel pipe tower rod piece, which can avoid the aeolian vibration phenomenon of the steel pipe tower rod piece so as to ensure the safe operation of the steel pipe tower under the long-term aeolian action.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, an embodiment of the present invention provides a turbulence energy dissipation device for suppressing a steel pipe tower member from breeze vibration, including a plurality of turbulence energy dissipation units, where adjacent turbulence energy dissipation units are connected by a turbulence line; the turbulent flow energy consumption units comprise fixing assemblies and turbulent flow energy consumption assemblies, the fixing assemblies are used for being fixed on the steel pipe tower rod pieces, the turbulent flow energy consumption assemblies comprise turbulent flow cylinders which are used for being sleeved on the outer sides of the fixing assemblies, guide wings are fixedly arranged on the side walls of the turbulent flow cylinders, and turbulent flow lines are connected between the guide wings of the adjacent turbulent flow energy consumption units.
As a further technical scheme, the adjacent turbulent flow energy consumption units are arranged at intervals, and the guide wings of the adjacent turbulent flow energy consumption units are arranged in a staggered mode, so that the turbulent flow lines form a spiral winding shape.
As a further technical scheme, the guide wings of the adjacent disturbed flow energy consumption units are vertically arranged.
As a further technical scheme, the end part of the turbulent line is fixed by an anchorage device, and an elastic element is fixedly connected between the anchorage device and the fixing component.
As a further technical scheme, the fixing assembly comprises two slips, the slips are of semi-cylindrical structures, and the two slips are oppositely arranged to form a cylinder shape.
As a further technical scheme, two ends of the slip are respectively provided with a semi-annular flange; the inner wall of the slips is coated with a viscoelastic material.
As a further technical scheme, the turbulence cylinder comprises two opposite tiles which are fixedly connected and enclose a circular tube type structure; the tile outside surface is equipped with the vortex recess.
As a further technical scheme, the tiles are sleeved between the semi-annular flanges of the slips, and gaps are reserved between the tiles and the slips; the guide wings are fixedly connected with the tiles and arranged along the radial direction of the tiles.
As a further technical scheme, the guide wings are of plate-shaped structures, the plate-shaped structures extend outwards from the outer side walls of the tiles, and the width sizes of the plate-shaped structures are sequentially reduced outwards from the side walls of the tiles.
As a further technical scheme, the end part of the guide wing is provided with a pore passage for a turbulent flow line to pass through; the elastic element adopts an SMA spring, and the elastic element is arranged in parallel with the central line of the guide wing.
The working principle of the invention is as follows:
the invention restrains the breeze vibration of the steel tube tower rod piece from two aspects of turbulent flow and energy consumption, and has a two-stage control principle. The vortex function is mainly realized through the vortex line of guiding wing, vortex recess and spiral winding around the steel pipe body, and the power consumption function mainly realizes through the elastic deformation of SMA spring and vortex line.
Specifically, the two-stage control principle is embodied as follows: firstly, a karman vortex street is formed on the leeward side of the steel pipe component under the action of breeze, and the guide wings, the turbulence grooves and the turbulence lines are used for interfering a wind field and destroying vortices; secondly, if the breeze vibration of the rod piece cannot be completely inhibited, the up-down alternating force acting on the guide wings enables the double-wing turbulence cylinders to rotate relative to the slip, so that elastic deformation of the SMA springs and the turbulence lines is caused, and energy is consumed to achieve the purpose of vibration reduction. Meanwhile, certain elastic restoring force exists after the SMA spring and the turbulent flow line are stretched, so that the device can reset automatically to keep the spiral state of the turbulent flow line around the steel pipe body.
The beneficial effects of the above-mentioned embodiment of the present invention are as follows:
(1) the turbulent flow energy dissipation device is used for inhibiting the phenomenon of breeze vibration of lattice tower steel pipe components such as power transmission towers, communication towers and the like.
(2) The invention has the double functions of turbulence and energy consumption, has two-stage control mechanisms, can realize the breeze vibration control of the steel pipe tower rod piece under different wind speeds, and has wider working frequency band.
(3) The invention improves the single turbulence mode of the prior device, adopts various modes such as the guide wings, the turbulence grooves, the turbulence lines and the like to disturb the wind field, can comprehensively inhibit vortex-induced vibration and has obvious effect.
(4) The energy consumption capacity of the invention is strong, and the energy is consumed through the elastic deformation of the SMA spring and the flow disturbing line. Simultaneously, the utility model realizes the multiple purposes of one object: the turbulence line can play a role of turbulence and can consume energy through elastic deformation; the SMA spring can be stretched to consume energy and can make the device restore to the original state.
(5) The invention is easy to install and has no damage to the steel pipe rod piece. Two semicircular tiles forming the double-wing turbulence cylinder are connected through bolts, the steel pipe body is connected with the slips through viscoelastic materials, and meanwhile, the viscoelastic materials play a certain buffering role.
(6) The invention is mostly made of light materials such as aluminum and the like, has light weight, simple structure and convenient installation and replacement, can effectively inhibit the breeze vibration of the steel pipe tower rod piece, and has good economical efficiency and applicability.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic diagram of a turbulent energy dissipating unit according to one or more embodiments of the present disclosure;
FIG. 2 is a schematic front view of a turbulent energy dissipating unit according to one or more embodiments of the present disclosure;
FIG. 3 is a schematic view of slips according to one or more embodiments of the present disclosure;
FIG. 4 is a schematic illustration of a dual-airfoil turbulator in accordance with one or more embodiments of the present invention;
FIG. 5 is a schematic view of the overall installation of the energy dissipation device on a steel pipe body according to one or more embodiments of the present invention;
in the figure: the mutual spacing or size is exaggerated to show the position of each part, and the schematic diagram is only used for illustration;
wherein, 1 steel pipe body, 2 double wing vortex cylinders, 3 slips, 4 through wires holes, 5 ground tackle, 6 vortex recesses, 7 bolts, 8 connecting plates, 9 water conservancy diversion wings, 10SMA spring, 11 vortex lines, 12 viscoelastic material, 13 pore.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, unless the invention expressly state otherwise, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;
for convenience of description, the words "up", "down", "left" and "right" in the present invention, if any, merely indicate correspondence with up, down, left and right directions of the drawings themselves, and do not limit the structure, but merely facilitate the description of the invention and simplify the description, rather than indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
The terms "mounted", "connected", "fixed", and the like in the present invention should be understood broadly, and for example, the terms "mounted", "connected", "fixed", and the like may be fixedly connected, detachably connected, or integrated; the two components can be connected mechanically or electrically, directly or indirectly through an intermediate medium, or connected internally or in an interaction relationship, and the terms used in the present invention should be understood as having specific meanings to those skilled in the art.
As introduced by the background art, the existing devices for inhibiting the aeolian vibration of the steel pipe rod piece are few, and have single function and form; in order to solve the technical problems, the invention provides a flow disturbing energy consumption device for inhibiting the aeolian vibration of a steel pipe tower rod piece.
In a typical embodiment of the present invention, as shown in fig. 1, a turbulent flow energy dissipation device for suppressing a steel pipe tower bar from a breeze vibration is proposed, which suppresses a breeze vibration of a steel pipe tower bar from two aspects of turbulent flow and energy dissipation, and has a two-stage control principle.
Wherein, the vortex function mainly realizes through the vortex line of guiding wing, vortex recess and spiral winding around the steel pipe body, and the power consumption function mainly realizes through the elastic deformation of SMA spring and vortex line.
The following detailed description of embodiments is made with reference to the accompanying drawings.
As shown in fig. 1, 2, 3, 4, and 5, the turbulent energy consuming device includes a plurality of turbulent energy consuming units, and adjacent turbulent energy consuming units are connected by a turbulent line.
Each turbulent flow energy consumption unit comprises a fixed assembly and a turbulent flow energy consumption assembly.
Wherein, fixed subassembly includes two slips 3, and the slips is semi-cylindrical structure, and two semi-cylindrical slips set up relatively and enclose into cylindricly.
The cross section of each slip is C-shaped, the middle part of each slip is of a semi-pipe structure, the two ends of each slip are respectively provided with a semi-annular flange, and the semi-annular flanges of the slips are provided with a threading hole 4.
In the present invention, the definition of the cross section and the longitudinal section is: the cylindrical structure enclosed by the two slips is taken as a reference, the radial section of the cylindrical structure is taken as a cross section, and the axial section of the cylindrical structure is taken as a longitudinal section.
The cylindrical structure that two slips enclose is established in the steel pipe body 1 outside, and slips 3 scribbles viscoelastic material 12 with steel pipe body 1 contact inner wall.
In an optional embodiment, the viscoelastic material 12 is an epoxy resin substrate, and the slips 3 are fixed on the outer wall of the steel pipe body 1 in an adhesive manner, so as to protect the steel pipe body and play a certain role in buffering.
Wherein, the disturbed flow energy consumption assembly comprises a double-wing disturbed flow cylinder 2, disturbed flow lines 11 and an SMA spring 10.
The double-wing turbulence barrel 2 consists of two symmetrical semicircular tiles, and the two tiles are oppositely arranged to form a circular tube type structure; the outer side surface of the tile is provided with turbulence grooves 6, so that the outer surface of the double-wing turbulence cylinder 2 is wavy, and airflow can be guided conveniently to weaken vortex-induced vibration.
In the present invention, the definitions of the inner and outer sides are: for a circular tube-shaped structure formed by two tiles, the inner wall close to the circular tube-shaped structure is the inner side, and the outer wall close to the circular tube-shaped structure is the outer side.
A connecting plate 8 is welded on the left side and the right side of each tile, a hole is formed in the middle of each connecting plate 8, and the connecting plates 8 of the two tiles are connected through bolts 7, so that the two tiles are connected into a whole.
Two semi-circular tiles cover outside slips 3, and leave certain clearance between tile and the slips two for two wing vortex cylinders 2 can be for slips 3 and free rotation.
Specifically, two semicircle tiles set up between the semi-annular edge of a wing at slips both ends, and the edge of a wing of slips can carry on spacingly to the tile from this, can prevent that the double wing vortex cylinder from sliding along the member axial, and at slips and the fixed back of steel pipe body simultaneously, the tile is rotatable.
A flow guide wing 9 is convexly arranged in the middle of the side wall of the semicircular tile, the flow guide wing is fixedly connected with the tile, and the flow guide wing is arranged along the radial direction of the tile.
In this embodiment, the guide vane 9 is a plate-shaped structure, the cross section of the plate-shaped structure is in a triangular form, the plate-shaped structure extends outwards from the outer side wall of the tile, and the width dimension of the plate-shaped structure decreases outwards from the outer side wall of the tile in sequence, so that a V-shaped form is formed when viewed from the outside. The width refers to the dimension of the cross section direction of the guide vane.
The thinner end of the guide vane is provided with a pore channel 13.
The turbulence lines 11 are spirally wound around the steel pipe body 1, and the length and the number of the turbulence lines 11 are determined by the frequency of the steel pipe rod piece vibrated by breeze; in this embodiment, the turbulent flow line is made of 7 silicone rubber strips with circular cross-section twisted into a twist shape.
Two ends of the turbulent flow line 11 respectively extend into the pore channels 13 of the guide wings of two adjacent turbulent flow energy dissipation units, and the end parts of the turbulent flow lines are fixed by the anchorage device 5.
In the present embodiment, the spoiler wire 11 is a silicone rubber strip with a circular cross section, and has reversible deformation and high elasticity. The length and the number of the turbulent flow lines are determined by the frequency of the steel pipe rod piece vibrated by breeze, and a plurality of turbulent flow lines are twisted into a twist shape when in use.
The two SMA springs 10 are arranged on one double-wing spoiler cylinder 2, one end of each SMA spring is fixed to a threading hole 4 on a flange of the slip, the other end of each SMA spring is connected with a fixed anchorage device 5, and the SMA springs 10 are arranged in parallel with the center line of the guide wing 9.
The SMA spring is made of Shape Memory Alloy (SMA for short), and the device can restore itself after deformation and energy consumption.
The slips 3 and the double-wing turbulence cylinders 2 are made of light aluminum materials by an integral forming processing technology.
In a preferred embodiment, the adjacent turbulent flow energy consumption units are arranged at intervals and in a staggered manner, and when the turbulent flow lines are connected to the guide wings of the two adjacent turbulent flow energy consumption units, a spiral winding shape outside the steel pipe body can be formed; so that the turbulent flow line is spirally wound around the steel pipe body to realize turbulent flow in a larger area.
In this embodiment, adjacent vortex energy dissipation units are arranged 90 degrees in a staggered manner, that is, the guide wings of the adjacent vortex energy dissipation units are arranged vertically, so that a vortex line can form a better spiral winding effect, and when a steel pipe tower rod piece is excited by breeze, elastic deformation energy dissipation can be generated, and then breeze vibration of the steel pipe tower rod piece is inhibited.
The disturbed flow energy consumption device of the invention should strictly follow the construction sequence when in site construction. As shown in fig. 5, the turbulent flow energy dissipation units of the present invention are arranged on the steel pipe rod at intervals, and the flow guide wing axes of two adjacent double-wing turbulent flow cylinders are perpendicular to each other, so that the turbulent flow lines 11 are spirally wound around the steel pipe body 1, and the arrangement number is determined according to actual needs. For a steel pipe tower rod piece needing to be subjected to breeze vibration control, firstly, coating a viscoelastic material 12 on the outer wall of a steel pipe body 1 to fix a slip 3; then, the double-wing turbulence barrels 2 are sleeved outside the slips 3 through the connecting plates 8 and the bolts 7, and a certain gap is left between the double-wing turbulence barrels and the slips; then, winding the preselected turbulence lines 11 around the steel pipe body 1 in a spiral state, wherein two ends of each turbulence line penetrate through the pore channels 13 of the two adjacent double-wing turbulence cylinders and are fixed through the anchorage device 5; finally, the SMA spring is connected between the threading hole 4 and the anchorage device 5, and the SMA spring 10 is parallel to the central line of the guide wing 9.
The specific working process of the turbulent flow energy consumption device is as follows:
according to the illustration in fig. 5, the turbulent flow energy dissipation device is installed on the steel pipe tower member which needs to be subjected to breeze vibration control, when the steel pipe body 1 is excited by breeze, a karman vortex street is formed on the leeward side of the steel pipe member, and the guide wings 9, the turbulent flow grooves 6 and the turbulent flow lines 11 are used for interfering with a wind field and destroying vortex; secondly, if the breeze vibration of the rod piece cannot be completely inhibited, the up-down alternating force acting on the guide wings 9 enables the double-wing spoiler cylinder 2 to rotate relative to the slip 3, so that the elastic deformation of the SMA spring 10 and the spoiler wires 11 is caused, and the energy is consumed to achieve the purpose of vibration reduction. Meanwhile, certain elastic restoring force exists after the SMA spring 10 and the turbulence wire 11 are stretched, so that the device can reset automatically to keep the spiral state of the turbulence wire 11 around the steel pipe body 1.
The turbulent flow energy dissipation device provided by the invention adopts various forms of disturbing wind fields such as the guide wings, the turbulent flow grooves, the turbulent flow lines and the like, generates elastic deformation energy dissipation through the SMA springs and the turbulent flow lines made of rubber materials, can comprehensively inhibit breeze vibration of the steel pipe tower rod piece, and has an obvious working effect. Meanwhile, the invention has light weight, simple structure, convenient installation and replacement and good application prospect.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A turbulence energy consumption device for inhibiting aeolian vibration of a steel pipe tower rod piece is characterized by comprising a plurality of turbulence energy consumption units, wherein adjacent turbulence energy consumption units are connected through turbulence lines; the turbulent flow energy consumption units comprise fixed components and turbulent flow energy consumption components, the fixed components are used for being fixed on the steel pipe tower rod pieces, the turbulent flow energy consumption components comprise turbulent flow cylinders which are sleeved outside the fixed components, guide wings are fixedly arranged on the side walls of the turbulent flow cylinders, turbulent flow lines are connected between the guide wings of adjacent turbulent flow energy consumption units, the adjacent turbulent flow energy consumption units are arranged at intervals, and the guide wings of the adjacent turbulent flow energy consumption units are arranged in a staggered mode, so that the turbulent flow lines form a spiral winding shape;
the turbulent flow line is made of a silicone rubber strip.
2. The turbulent flow energy dissipation device for suppressing the aeolian vibration of the steel tube tower bar piece of claim 1, wherein the guide wings of adjacent turbulent flow energy dissipation units are vertically arranged.
3. The turbulent flow energy dissipation device for suppressing the aeolian vibration of steel tube tower bar member of claim 1, wherein said end portion of said turbulent flow wire is fixed by an anchorage device, and an elastic member is fixedly connected between said anchorage device and said fixing member.
4. The turbulent flow energy dissipation device for suppressing the aeolian vibration of the steel tube tower rod piece according to claim 1, wherein said fixing component comprises two slips, said slips are of a semi-cylindrical structure, and said two slips are oppositely arranged to form a cylinder.
5. The flow disturbance energy dissipation device for suppressing the aeolian vibration of the steel tube tower rod piece according to claim 4, wherein two ends of said slip are respectively provided with a semi-annular flange; the inner wall of the slips is coated with a viscoelastic material.
6. The turbulent flow energy dissipation device for suppressing the aeolian vibration of the steel tube tower rod piece according to claim 5, wherein said turbulent flow cylinder comprises two opposite tiles, and the two tiles are fixedly connected and enclose a circular tube structure; the tile outside surface is equipped with the vortex recess.
7. The turbulence energy dissipation device for suppressing the aeolian vibration of the steel pipe tower rod piece according to claim 6, wherein said tiles are sleeved between the semi-annular flanges of the slips, and a gap is left between the tiles and the slips; the guide wings are fixedly connected with the tiles and arranged along the radial direction of the tiles.
8. The turbulence energy dissipation device for suppressing the aeolian vibration of the steel pipe tower bar piece of claim 7, wherein said guide wings are plate-shaped structures, the plate-shaped structures extend outwards from the outer side wall of the tile, and the width dimension of the plate-shaped structures is gradually reduced outwards from the side wall of the tile.
9. The flow disturbance energy dissipation device for suppressing the aeolian vibration of the steel tube tower bar piece according to claim 3, wherein the end portions of said guide wings are provided with ducts for the flow disturbance lines to pass through; the elastic element adopts an SMA spring, and the elastic element is arranged in parallel with the central line of the guide wing.
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| CN113737976B (en) * | 2021-06-30 | 2022-11-15 | 国网河南省电力公司电力科学研究院 | Flexible breeze vibration turbulence suppression device for power transmission steel pipe tower and installation method thereof |
| CN115653377B (en) * | 2022-12-21 | 2023-03-31 | 中国电建集团山东电力建设第一工程有限公司 | Vibration suppression device and method for power transmission tower steel pipe based on magnetostriction |
| CN115949279B (en) * | 2023-03-14 | 2023-06-02 | 厦门环寂高科有限公司 | Take shaft tower reinforcing apparatus of light cable |
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