CN113530341A - Vortex-induced vibration suppression device and method for steel pipe component of power transmission line - Google Patents
Vortex-induced vibration suppression device and method for steel pipe component of power transmission line Download PDFInfo
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- CN113530341A CN113530341A CN202110716446.4A CN202110716446A CN113530341A CN 113530341 A CN113530341 A CN 113530341A CN 202110716446 A CN202110716446 A CN 202110716446A CN 113530341 A CN113530341 A CN 113530341A
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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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- 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
- E04H12/02—Structures made of specified materials
- E04H12/08—Structures made of specified materials of metal
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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
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/14—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate against other dangerous influences, e.g. tornadoes, floods
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- 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
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- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The invention discloses a device and a method for inhibiting vortex-induced vibration of a steel pipe member of a power transmission line, wherein the device comprises a bearing sleeved on the surface of a steel pipe, an eccentric guide wing is sleeved on the side part of an outer ring of the bearing, a plurality of magnet pieces are fixedly arranged on the surface of the steel pipe, a conductive rotating rod is arranged at the end part of the outer ring of the bearing and extends into gaps among the magnet pieces; the invention can effectively prevent the phenomenon that the steel pipe component of the power transmission line is easy to generate vortex-induced vibration to cause fatigue damage under breeze.
Description
Technical Field
The invention relates to the technical field of transmission line vortex-induced vibration suppression, in particular to a device and a method for suppressing vortex-induced vibration of a steel pipe component of a transmission line.
Background
At the present stage, a large number of steel tube towers are used in the power transmission line, and compared with angle steel towers, the steel tube towers can fully utilize the high bearing performance of materials, have small wind pressure of components, large rigidity, simple structure and clear force transmission, reduce the weight of the towers by about 15 percent compared with the conventional angle steel towers, and can effectively reduce the basic acting force. But the steel pipe component of the power transmission tower is easy to generate vortex-induced vibration to cause fatigue failure under breeze. When horizontal wind load acts on the round steel pipe, alternating vortex is generated on the leeward side of the steel pipe and alternately falls off from one side to the other side to form a karman vortex array, the karman vortex array can generate periodic pressure on the surface of the structure, and periodic acting force is generated on the structure, the direction of the periodic acting force is vertical to the wind direction, and the karman vortex array is called as transverse wind acting force or lifting force. This periodic vibration caused by alternating vortices and perpendicular to the wind direction is called "vortex-induced vibration". Since the conventional method cannot completely suppress the occurrence of vortex-induced vibration by changing the aerodynamic configuration of a steel pipe member having a large slenderness ratio, a good suppression device is required to be installed on the steel pipe for power transmission to prevent fatigue damage due to long-term breeze vibration.
Disclosure of Invention
The invention aims to overcome the defects and provides a device and a method for inhibiting vortex-induced vibration of a steel pipe member of a power transmission line, which can effectively prevent the steel pipe member of the power transmission line from generating the phenomenon of fatigue failure caused by vortex-induced vibration under breeze.
In order to solve the technical problems, the invention adopts the technical scheme that: the utility model provides a transmission line steel pipe component vortex induced vibration suppression device, includes the bearing of suit in the steel pipe surface, bearing inner race lateral part cover is equipped with eccentric direction wing, the steel pipe surface still is fixed and is equipped with a plurality of magnet pieces, bearing inner race tip is equipped with electrically conductive rotary rod, electrically conductive rotary rod stretches into the gap department between a plurality of magnet pieces.
Preferably, the eccentric guide wing comprises an annular sleeve sleeved on the side part of the bearing outer ring, and a wing piece is fixedly arranged at one end of the annular sleeve.
Preferably, the surface of the fin is in a streamline structure.
Preferably, the annular sleeve is assembled by two semi-annular sheet structures, and every semi-annular structure lateral part all is equipped with an installation board and a fin, all offers the screw that is used for construction bolt on installation board and the fin.
Preferably, the number of the bearings is two, the two bearings are respectively positioned at the upper part and the lower part of the inner side of the eccentric guide wing, and a plurality of conductive rotating rods are vertically arranged between the end parts of the outer rings of the two bearings.
Preferably, the magnet piece is the loop configuration, and is parallel to each other between every magnet piece, electrically conductive rotary rod includes respectively with upside bearing inner race tip and downside bearing inner race tip fixed connection's vertical pole, be connected with a plurality of horizontal poles that are parallel to each other on the vertical pole perpendicularly, the horizontal pole stretches into in the gap between two adjacent magnet pieces.
Preferably, the surface of the annular sleeve is also obliquely provided with an arc-shaped guide plate.
Preferably, the surface of the annular sleeve is further provided with heat dissipation holes.
In addition, the invention also discloses a suppression method of the device for suppressing the vortex-induced vibration of the steel pipe member of the power transmission line, which comprises the following steps:
step 1): when the steel pipe in the power transmission line generates vortex-induced vibration under the action of breeze, the breeze blows over the eccentric guide wings, and the eccentric guide wings rotate on the surface of the steel pipe under the action of wind force, so that partial vortex-induced vibration of the steel pipe is counteracted;
step 2): when the steel pipe vibrates in a vortex-induced mode, the eccentric guide wings can be directly driven to rotate under the action of the eccentric structures of the eccentric guide wings, so that part of vortex-induced vibration of the steel pipe is counteracted;
step 3): after the breeze disappears, because of inertial action, the eccentric direction wing is rotatory and drive the bearing inner race and continue to rotate a period, at this in-process, electrically conductive rotary rod also can be rotatory along with the rotation of bearing inner race, the continuous perpendicular intersection of magnetic field with between the magnet piece of electrically conductive rotary rod, thereby can produce the vortex in electrically conductive rotary rod, and can arouse induced magnetic field, known by lenz's law, this induced magnetic field can exert damping force to the rotation of electrically conductive rotary rod, this damping force can make the rotational speed of bearing inner race and eccentric direction wing reduce rapidly, avoid the eccentric direction wing to influence the steel pipe because of long-time inertial rotation.
Preferably, in step 3), the eddy current generated in the conductive rotating rod dissipates heat, and the heat can be dissipated rapidly from the heat dissipation holes on the surface of the eccentric guiding wing.
The invention has the beneficial effects that: the invention can effectively prevent the steel pipe component of the power transmission line from generating the phenomenon of fatigue damage caused by vortex-induced vibration easily under breeze; when the steel pipe in the power transmission line generates vortex-induced vibration under the action of breeze, the breeze blows over the eccentric guide wings, and the eccentric guide wings rotate on the surface of the steel pipe under the action of wind force, so that partial vortex-induced vibration of the steel pipe is counteracted; when breeze stops acting, the conductive rotating rod and the magnet piece rotate relatively to generate eddy current, and an induced magnetic field is excited, the induced magnetic field can apply damping force to the rotation of the conductive rotating rod, the damping force can rapidly reduce the rotation speed of the bearing outer ring and the eccentric guide wing, and the influence of the eccentric guide wing on the steel pipe due to long-time inertial rotation is avoided.
Drawings
Fig. 1 is a schematic structural diagram of a vortex-induced vibration suppression device for a steel pipe member of a power transmission line;
FIG. 2 is a schematic view of the internal structure of FIG. 1 with a portion of the annulus removed;
FIG. 3 is a schematic perspective view of a conductive rotating rod;
FIG. 4 is a schematic view of the mounting structure of the conductive rotating rod and the magnet piece.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
As shown in fig. 1 to 4, the device for suppressing vortex-induced vibration of a steel pipe member of a power transmission line comprises a bearing 2 sleeved on the surface of a steel pipe 1, wherein an eccentric guide wing 3 is sleeved on the side portion of the outer ring of the bearing 2, a plurality of magnet pieces 4 are further fixedly arranged on the surface of the steel pipe 1, a conductive rotating rod 5 is arranged at the end portion of the outer ring of the bearing 2, and the conductive rotating rod 5 extends into gaps among the magnet pieces 4.
Preferably, the eccentric guide vane 3 comprises an annular sleeve 3.1 sleeved on the side part of the outer ring of the bearing 2, and a vane 3.2 is fixedly arranged at one end of the annular sleeve 3.1.
Preferably, the surface of the fin 3.2 is in a streamline structure. The vanes 3.2 of this streamlined construction are effective in modifying the air flow process to streamline it, thereby reducing the vortex induced vibration amplitude.
Preferably, the annular sleeve 3.1 is assembled by two semi-annular sheet structures, the side part of each semi-annular structure is provided with a mounting plate 3.3 and a wing 3.2, and the mounting plate 3.3 and the wing 3.2 are provided with screw holes 3.4 for mounting bolts. After the design, the whole eccentric guiding wing 3 is conveniently and directly installed on the bearing 2 from the side part of the steel pipe 1.
Preferably, the number of the bearings 2 is two, the two bearings are respectively located at the upper part and the lower part of the inner side of the eccentric guide wing 3, and a plurality of conductive rotating rods 5 are vertically arranged between the end parts of the outer rings of the two bearings 2.
Preferably, the magnet pieces 4 are of an annular structure, each magnet piece 4 is parallel to the other magnet piece 4, the conductive rotating rod 5 comprises a vertical rod 5.1 fixedly connected with the outer ring end of the upper bearing 2 and the outer ring end of the lower bearing 2, a plurality of parallel transverse rods 5.2 are vertically connected to the vertical rod 5.1, and the transverse rods 5.2 extend into gaps between the two adjacent magnet pieces 4. Preferably, an insulating connection may be provided at the location where the vertical rod 5.1 is connected to the outer ring end of the bearing 2, in order to prevent the generated eddy currents from flowing towards the bearing 2.
Preferably, the surface of the annular sleeve 3.1 is also obliquely provided with an arc-shaped flow guide plate 3.5. The arc-shaped guide plate 3.5 is obliquely and additionally arranged, when breeze blows, the arc-shaped guide plate 3.5 is stressed to rotate, so that the eccentric guide wing 3 is easier to rotate, and the effect of inhibiting vortex-induced vibration is enhanced.
Preferably, the surface of the annular sleeve 3.1 is further provided with heat dissipation holes 3.6.
In addition, the embodiment also discloses a suppression method of the device for suppressing the vortex-induced vibration of the steel pipe member of the power transmission line, which comprises the following steps:
step 1): when the steel pipe 1 in the power transmission line generates vortex-induced vibration under the action of breeze, the breeze blows over the eccentric guide wings 3 at the moment, and the eccentric guide wings 3 rotate on the surface of the steel pipe 1 under the action of wind force, so that part of vortex-induced vibration of the steel pipe 1 is counteracted;
step 2): when the steel pipe 1 vibrates in a vortex-induced mode, the eccentric guide wings 3 are directly driven to rotate under the action of the eccentric structures of the eccentric guide wings 3, so that part of vortex-induced vibration of the steel pipe 1 is counteracted;
step 3): after the breeze disappears, due to the inertia effect, the eccentric guide wings 3 rotate and drive the outer ring of the bearing 2 to continue rotating for a period of time, in the process, the conductive rotating rod 5 can also rotate along with the rotation of the outer ring of the bearing 2, the conductive rotating rod 5 continuously and perpendicularly intersects with the magnetic field between the magnet pieces 4, eddy currents can be generated in the conductive rotating rod 5, and an induced magnetic field can be excited, the induction magnetic field can apply damping force to the rotation of the conductive rotating rod 5, the damping force can rapidly reduce the rotating speed of the outer ring of the bearing 2 and the eccentric guide wings 3, and the influence of the eccentric guide wings 3 on the steel pipe 1 due to long-time inertial rotation is avoided.
Preferably, in step 3), the eddy current generated in the conductive rotating rod 5 dissipates heat, and the heat can be dissipated rapidly from the heat dissipation holes 3.6 on the surface of the eccentric guiding vane 3.
The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and features in the embodiments and examples in the present application may be arbitrarily combined with each other without conflict. The protection scope of the present invention is defined by the claims, and includes equivalents of technical features of the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the invention.
Claims (10)
1. The utility model provides a transmission line steel pipe component vortex induced vibration suppression device, includes bearing (2) of suit in steel pipe (1) surface, its characterized in that: bearing (2) outer lane lateral part cover is equipped with eccentric direction wing (3), steel pipe (1) surface is still fixed and is equipped with a plurality of magnet pieces (4), bearing (2) outer lane tip is equipped with electrically conductive rotary rod (5), gap department between a plurality of magnet pieces (4) is stretched into in electrically conductive rotary rod (5).
2. The vortex-induced vibration suppression device for the steel pipe member of the power transmission line according to claim 1, characterized in that: the eccentric guide wing (3) comprises an annular sleeve (3.1) sleeved on the lateral part of the outer ring of the bearing (2), and a wing (3.2) is fixedly arranged at one end of the annular sleeve (3.1).
3. The vortex-induced vibration suppression device for the steel pipe member of the power transmission line according to claim 2, characterized in that: the surface of the fin (3.2) is of a streamline structure.
4. The vortex-induced vibration suppression device for the steel pipe member of the power transmission line according to claim 2, characterized in that: annular sleeve (3.1) is formed by two semicircular sheet structures equipment, and every semicircular structure lateral part all is equipped with a mounting panel (3.3) and a fin (3.2), all offers screw (3.4) that are used for construction bolt on mounting panel (3.3) and fin (3.2).
5. The vortex-induced vibration suppression device for the steel pipe member of the power transmission line according to claim 1, characterized in that: the number of the bearings (2) is two, the bearings are respectively positioned at the upper part and the lower part of the inner side of the eccentric guide wing (3), and a plurality of conductive rotating rods (5) are vertically arranged between the end parts of the outer rings of the two bearings (2).
6. The device for suppressing vortex-induced vibration of the steel pipe member of the power transmission line according to claim 5, characterized in that: magnet piece (4) are the loop configuration, and are parallel to each other between every magnet piece (4), electrically conductive rotary rod (5) including respectively with upside bearing (2) outer lane tip and downside bearing (2) outer lane tip fixed connection's vertical rod (5.1), be connected with a plurality of parallel horizontal poles (5.2) of each other on vertical rod (5.1) perpendicularly, horizontal pole (5.2) stretch into in the gap between two adjacent magnet pieces (4).
7. The vortex-induced vibration suppression device for the steel pipe member of the power transmission line according to claim 2, characterized in that: the surface of the annular sleeve (3.1) is also obliquely provided with an arc-shaped guide plate (3.5).
8. The vortex-induced vibration suppression device for the steel pipe member of the power transmission line according to claim 2, characterized in that: the surface of the annular sleeve (3.1) is also provided with heat dissipation holes (3.6).
9. A method for suppressing the vortex-induced vibration suppression device of the steel pipe member for power transmission lines according to any one of claims 1 to 8, characterized in that: it comprises the following steps:
step 1): when the steel pipe (1) in the power transmission line generates vortex-induced vibration under the action of breeze, the breeze blows over the eccentric guide wings (3), and the eccentric guide wings (3) rotate on the surface of the steel pipe (1) under the action of wind force, so that part of vortex-induced vibration of the steel pipe (1) is counteracted;
step 2): when the steel pipe (1) vibrates in a vortex-induced mode, the eccentric guide wings (3) can be directly driven to rotate under the action of the eccentric structures of the eccentric guide wings (3), and therefore partial vortex-induced vibration of the steel pipe (1) is counteracted;
step 3): after the breeze disappears, due to the inertia effect, the eccentric guide wings (3) rotate and drive the outer ring of the bearing (2) to continue rotating for a period of time, in the process, the conductive rotating rod (5) can also rotate along with the rotation of the outer ring of the bearing (2), the conductive rotating rod (5) constantly intersects with the magnetic field between the magnet sheets (4) vertically, so that eddy current can be generated in the conductive rotating rod (5), an induced magnetic field can be excited, the induction magnetic field can exert damping force on the rotation of the conductive rotating rod (5), the damping force can rapidly reduce the rotating speed of the outer ring of the bearing (2) and the eccentric guide wings (3), and the influence of the eccentric guide wings (3) on the steel pipe (1) due to long-time inertial rotation is avoided.
10. The suppression method according to claim 8, characterized in that: in the step 3), the eddy current generated in the conductive rotating rod (5) can dissipate heat, and the heat can be rapidly dissipated from the heat dissipation holes (3.6) on the surface of the eccentric guiding wing (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110716446.4A CN113530341B (en) | 2021-06-25 | 2021-06-25 | Vortex-induced vibration suppression device and method for steel pipe component of power transmission line |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110716446.4A CN113530341B (en) | 2021-06-25 | 2021-06-25 | Vortex-induced vibration suppression device and method for steel pipe component of power transmission line |
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| CN113530341A true CN113530341A (en) | 2021-10-22 |
| CN113530341B CN113530341B (en) | 2023-02-07 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100029065A (en) * | 2008-06-11 | 2010-03-15 | 미츠비시 쥬고교 가부시키가이샤 | Flange joint for structural member |
| CN102661346A (en) * | 2012-05-21 | 2012-09-12 | 谭晓婧 | Double-discharging-rod magnetorheological elastic body plate type shock absorber |
| CN204940895U (en) * | 2015-09-23 | 2016-01-06 | 中国石油集团海洋工程（青岛）有限公司 | The vortex-induced vibration suppression device that large jacket is built |
| CN205078686U (en) * | 2015-11-04 | 2016-03-09 | 株洲时代新材料科技股份有限公司 | Orthoscopic dynamic vibration absorber with magnetic damping |
-
2021
- 2021-06-25 CN CN202110716446.4A patent/CN113530341B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20100029065A (en) * | 2008-06-11 | 2010-03-15 | 미츠비시 쥬고교 가부시키가이샤 | Flange joint for structural member |
| CN102661346A (en) * | 2012-05-21 | 2012-09-12 | 谭晓婧 | Double-discharging-rod magnetorheological elastic body plate type shock absorber |
| CN204940895U (en) * | 2015-09-23 | 2016-01-06 | 中国石油集团海洋工程（青岛）有限公司 | The vortex-induced vibration suppression device that large jacket is built |
| CN205078686U (en) * | 2015-11-04 | 2016-03-09 | 株洲时代新材料科技股份有限公司 | Orthoscopic dynamic vibration absorber with magnetic damping |
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