CN109994982B - Rotation wire clamp of damper with weak rotation resistance - Google Patents
Rotation wire clamp of damper with weak rotation resistance Download PDFInfo
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- CN109994982B CN109994982B CN201910354177.4A CN201910354177A CN109994982B CN 109994982 B CN109994982 B CN 109994982B CN 201910354177 A CN201910354177 A CN 201910354177A CN 109994982 B CN109994982 B CN 109994982B
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- outer shell
- damper
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- 230000000670 limiting effect Effects 0.000 claims description 25
- 238000005096 rolling process Methods 0.000 claims description 21
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000000725 suspension Substances 0.000 abstract description 21
- 125000006850 spacer group Chemical group 0.000 abstract description 12
- 230000000694 effects Effects 0.000 abstract description 7
- 230000002401 inhibitory effect Effects 0.000 abstract description 5
- 230000003313 weakening effect Effects 0.000 abstract description 5
- 239000004020 conductor Substances 0.000 description 46
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 34
- 239000011248 coating agent Substances 0.000 description 21
- 238000000576 coating method Methods 0.000 description 21
- 230000005540 biological transmission Effects 0.000 description 20
- 238000010586 diagram Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004590 computer program Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 230000001502 supplementing effect Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G7/00—Overhead installations of electric lines or cables
- H02G7/14—Arrangements or devices for damping mechanical oscillations of lines, e.g. for reducing production of sound
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- Suspension Of Electric Lines Or Cables (AREA)
Abstract
The application provides a rotation wire clamp of a damper with weak rotation resistance, which comprises the following components: an inner shell, an outer shell and a rotating part, wherein the inner shell and the outer shell are used for clamping wires, and the rotating part is arranged between the inner shell and the outer shell; the inner shell penetrates through the cavity of the outer shell; an annular gap is formed between the inner shell and the outer shell, and the inner shell is not contacted with the outer shell; the axial center line of the inner shell coincides with the axial center line of the outer shell; the rotating part is arranged in the annular gap; the rotating part rotates relative to the inner shell. The application makes the wire clamped by the rotary wire clamp of the damper have good rotation effect through the rotation part, and is matched with the suspension wire clamp with weak rotation resistance and the spacer with weak rotation resistance for use, thereby weakening the uneven degree of wire icing under the weather conditions of rain, snow and ice, inhibiting the galloping of the wire and improving the safe operation level of the circuit and the power grid.
Description
Technical Field
The invention relates to the technical field of electric power transmission, in particular to a rotary wire clamp of a damper with weak rotation resistance, which is used for preventing wires of an overhead transmission line from waving.
Background
An overhead transmission line (simply called line) is an important device for transmitting electric power energy, and is composed of iron towers, wires, overhead ground wires and other elements, wherein the wires of an alternating current line comprise A, B, C three phases, and the wires of a direct current line comprise positive poles and negative poles. Under certain ice coating and strong wind conditions, uneven eccentric ice coating can be formed on the wire, so that the aerodynamic performance of the wire is changed, and the wire is easy to vibrate greatly, and is vividly called waving. Waving can reduce the distance between wires and cause discharge tripping; the tension of the wire can be increased, the reverse tower and the broken wire are caused, and the wire is one of main faults which threaten the safety of power transmission.
Relatively speaking, a wire capable of freely rotating is not easy to dance, and a wire incapable of freely rotating is more easy to dance, which is caused by the ice coating difference of the wire and the wire. In winter, the strong wind moves horizontally along the ground, and supercooled water vapor in the air is blown to the wire and is condensed into ice on the windward side of the wire, which is called eccentric icing. Such eccentric icing can produce a moment about the centerline of the wire as the axis of rotation.
(1) For a wire capable of freely rotating, the moment can enable the wire to rotate by an angle according to the moment direction, so that the windward side of the wire is changed, namely, a part of the surface of the wire originally in the windward side range rotates out of the windward side and ice coating is not continued; and a part of the wire surface which is not in the windward area is turned into the windward area and starts to cover ice, namely the windward area (namely the ice-covered area) of the wire is gradually changed along with the rotation of the wire, and finally a circle of relatively uniform annular ice-covered wire is formed on the wire, and the annular ice-covered wire is similar to the wire without ice-covered wire, and is not easy to form lifting force, so the probability of the wire capable of freely rotating to swing is relatively low.
(2) For a wire that cannot rotate freely, the wire does not rotate despite the moment of the eccentric ice coating, so its windward side (i.e., ice coating area) is fixed. Over time, the icing on the windward side gradually increases and thickens, i.e. the eccentric icing becomes more and more serious. Compared with a uniform annular ice-coated wire, a serious eccentric ice-coated wire is easier to form lifting force, so that the probability of galloping of the wire which cannot rotate freely is relatively high.
The damper is one of elements on the wire that is directly connected to the wire and restricts the wire from rotating. The damper is hung on the two sides of the tangent tower of the line and on the wires and the ground wire adjacent to the outlet of the suspension clamp and is used for preventing and reducing breeze vibration of the wires and the ground wire. Because the wire clamp of the conventional damper is a fixed wire clamp, and the hammer head of the damper is suspended under the wire, the damper has a limiting effect on the rotation of the wire.
Therefore, how to ensure that the wire clamped in the damper wire clamp can flexibly rotate under the weather conditions of rain, snow and ice so as to weaken eccentric icing of the wire and reduce the wire galloping probability is a technical problem to be solved currently.
Disclosure of Invention
In order to solve the defects in the prior art, the invention provides the revolving wire clamp of the damper with weak rotation resistance, the revolving wire clamp of the damper is divided into the inner shell and the outer shell, and the rotating part is arranged between the inner shell and the outer shell, so that a wire clamped by the revolving wire clamp of the damper has good rotation effect, thereby weakening the uneven degree of wire icing under the weather conditions of rain, snow and ice, inhibiting the wire from waving, improving the safe operation level of a line and a power grid, and supplementing and perfecting the beneficial effects of the wire waving prevention technology of the existing overhead transmission line.
In order to achieve the above object, the present invention provides a swing clamp of a damper with weak rotational resistance, the swing clamp of the damper with weak rotational resistance comprising: an inner shell, an outer shell and a rotating part, wherein the inner shell and the outer shell are used for clamping wires, and the rotating part is arranged between the inner shell and the outer shell;
The inner shell penetrates through the cavity of the outer shell; an annular gap is formed between the inner shell and the outer shell, and the inner shell is not contacted with the outer shell; the axial center line of the inner shell coincides with the axial center line of the outer shell;
The rotating part is arranged in the annular gap; the rotating part rotates relative to the inner shell.
In one embodiment, the rotating part includes: a plurality of rollers;
The rolling shafts are uniformly arranged in the annular gap in parallel with the axial center line of the inner shell, and two ends of each rolling shaft are respectively embedded in the inner wall of the outer shell;
each roller is in line contact with the inner shell and rotates relatively.
In one embodiment, the roller comprises: a plurality of rollers and a plurality of limiting shaft sleeves;
the rollers are uniformly arranged in the annular gap parallel to the axial center line of the inner shell, and two ends of each roller are respectively embedded in the inner wall of the outer shell;
each limiting shaft sleeve is sleeved on one roller respectively, and each limiting shaft sleeve is in line contact with the inner shell respectively and rotates relatively.
In one embodiment, the roller further comprises: a plurality of rolling bearings;
The two ends of each roller are respectively sleeved with a rolling bearing.
In one embodiment, the inner housing comprises: a first half and a second half;
The first half and the second half are fastened into a whole through a plurality of bolts.
In one embodiment, the inner shell is hollow and cylindrical.
In one embodiment, the housing comprises: a housing body and a housing gland;
the first end of the shell main body is connected with the first end of the shell gland through a rotating shaft;
The second end of the shell main body and the second end of the shell gland are fastened into a whole through bolts.
In one embodiment, the swing clamp of the damper with weak rotation resistance further includes: and a damper interface fixedly connected to the second end of the housing body.
In one embodiment, a cylindrical protrusion is arranged in the middle of the inner shell; the cylindrical protrusions are respectively in line contact with the rolling shafts and rotate relatively.
In one embodiment, a cylindrical recess matched with the cylindrical protrusion is respectively arranged in the middle of each limiting shaft sleeve; the cylindrical protrusions are respectively contacted with the cylindrical concave lines and rotate relatively.
In one embodiment, the number of rollers is at least 3; the number of the limiting shaft sleeves is at least 3; the number of the rolling bearings is at least 6.
In one embodiment, a protective layer is disposed in the inner shell; the protective layer includes: rubber pad or aluminum tape.
The application provides a rotation wire clamp of a damper with weak rotation resistance, which comprises the following components: an inner shell, an outer shell and a rotating part, wherein the inner shell and the outer shell are used for clamping wires, and the rotating part is arranged between the inner shell and the outer shell; the inner shell penetrates through the cavity of the outer shell; an annular gap is formed between the inner shell and the outer shell, and the inner shell is not contacted with the outer shell; the axial center line of the inner shell coincides with the axial center line of the outer shell; the rotating part is arranged in the annular gap; the rotating part rotates relative to the inner shell. The application makes the wire clamped by the rotary wire clamp of the damper have good rotation effect through the rotation part, and is matched with the suspension wire clamp with weak rotation resistance and the spacer with weak rotation resistance for use, thereby weakening the uneven degree of wire icing under the weather conditions of rain, snow and ice, inhibiting the galloping of the wire and improving the safe operation level of the circuit and the power grid.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a swing wire clip of a damper with weak rotational resistance according to the present application;
FIG. 2 is a schematic radial cross-sectional view of a swivel clip of a damper with weak rotational resistance in one embodiment of the application;
FIG. 3 is an axial cross-sectional view of a swivel clip of a damper with weak rotational resistance after assembly of a wire in an embodiment of the application;
Fig. 4 is a schematic structural view of a swing wire clip of a damper with weak rotational resistance in an embodiment of the present application;
FIG. 5 is a schematic radial cross-sectional view of a swivel clip of a damper with weak rotational resistance in one embodiment of the application;
FIG. 6 is a schematic view of a rotating part in another embodiment of the present application;
FIG. 7 is a schematic diagram of a swing clamp and a low rotational resistance suspension clamp of a low rotational resistance damper in accordance with one embodiment of the present application in combination with a single conductor for an overhead transmission line;
FIGS. 8a, 8b and 8c are schematic diagrams of eccentric icing of three common wires;
FIG. 9 is a simplified schematic illustration of a fan-shaped eccentric ice coating with an included angle of 180;
FIG. 10 is a schematic view of wire loop icing;
fig. 11 is a schematic diagram of a swing clamp, a suspension clamp and a spacer for weak rotation resistance of a damper with weak rotation resistance applied to split conductors of an overhead transmission line in accordance with an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The terms "first," "second," … …, and the like, as used herein, do not denote a particular order or sequence, nor are they intended to be limiting of the invention, but rather are merely used to distinguish one element or operation from another in the same technical terms.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
As used herein, "and/or" includes any or all combinations of such things.
Technical term interpretation:
Overhead conductor: the elements used for transmitting electric energy in overhead transmission lines are simply called wires.
Split conductor (Bundled Conductor): in order to inhibit corona discharge of high-voltage AC and DC transmission lines and reduce reactance of the AC transmission lines, a lead erection mode adopted for equivalently increasing lead diameter and improving transmission power is that each phase (or each pole) of lead consists of a plurality of sub-leads with smaller diameters, the sub-leads are arranged at intervals and in symmetrical polygons, and the sub-leads are all arranged on the vertexes of the regular polygons.
Spacer bar: elements for supporting and securing subconductors of a split conductor of an overhead transmission line are typically mounted with a spacer bar every few tens of meters along the split conductor.
Suspension clamp: elements in overhead transmission lines for holding and suspending conductors and overhead ground wires in a suspended manner from a line tower.
Aiming at the defects in the prior art, the structure schematic diagram of the rotation wire clamp of the damper with weak rotation resistance is shown in fig. 1, and the rotation wire clamp 1 of the damper with weak rotation resistance comprises: an inner case 2, an outer case 3, and a rotating portion 4 provided between the inner case 2 and the outer case 3. The inner housing 2 secures the lead 5 to the inner cavity of the inner housing 2 by clamping. Wherein, the inner shell 2 is hollow cylindrical, and penetrates through the cavity of the outer shell 3.
As shown in fig. 1 and 2, an annular gap 6 is provided between the inner shell 2 and the outer shell 3, and the inner shell 2 and the outer shell 3 are not in contact. The axial centre line of the inner shell 2 coincides with the axial centre line of the outer shell 3. Wherein a protective layer 21 is provided inside the inner shell 2. The protective layer 21 includes: the application is not limited to the rubber cushion or the aluminum tape.
As shown in fig. 2, the rotating portion 4 is disposed in the annular space 6, and the rotating portion 4 rotates relative to the inner housing 2.
In one embodiment, as shown in fig. 3, the inner case 2 includes: first half 22 and second half 23.
The first half 22 and the second half 23 are fastened together by means of bolts (not shown in the figures).
In one embodiment, as shown in fig. 4, the housing 3 includes: the housing body 31 and the housing gland 32.
The first end of the housing main body 31 is movably connected with the first end of the housing pressing cover 32 through a rotating shaft 33, so that the housing pressing cover 32 can rotate around the rotating shaft 33, and the opening and closing between the housing pressing cover 32 and the housing main body 31 are realized.
A second end of the housing body 31 is fastened to a second end of the housing gland 32 by bolts 34.
In this embodiment, the inner case 2 and the outer case 3 are designed as two detachable parts, so as to facilitate the installation and removal of the lead wires 5.
In one embodiment, as shown in fig. 4, the swing clamp 1 of the damper with weak rotational resistance further includes: the damper interface 7, the damper interface 7 is fixedly connected to the second end of the housing main body 31.
In one embodiment, the rotating portion 4 includes: a plurality of rollers 41. Wherein, each roller 41 is uniformly arranged in the annular gap 6 parallel to the axial center line of the inner shell 2, and two ends of each roller 41 are respectively embedded in the inner wall of the outer shell 3. The rollers 41 are respectively in line contact with the inner housing 2 and rotate relative to each other.
In particular, as shown in fig. 3, the roller 41 (not shown) includes: a plurality of rollers 411, a plurality of limiting bushings 412 and a plurality of rolling bearings 413.
Each roller 411 is disposed in the annular space 6 in parallel to the axial center line of the inner casing 2 (including the first half 22 and the second half 23), and both ends of each roller 411 are respectively embedded in the inner wall of the outer casing 3. As shown in fig. 5, two ends of 3 rollers 411 are mounted on the inner wall of the housing main body 31, and two ends of the remaining 3 rollers 411 are mounted on the inner wall of the housing gland 32. The number of rollers 411 is at least 3, the number of limiting sleeves 412 is at least 3, and the number of rolling bearings 413 is at least 6.
As shown in fig. 3, each of the limiting sleeves 412 is sleeved on a roller 411, and each of the limiting sleeves 412 is in line contact with the inner housing 2 and rotates relatively.
Two ends of each roller 411 are respectively sleeved with a rolling bearing 413. As shown in fig. 3, each rolling bearing 413 is located between the inner wall of the housing 3 (including the housing body 31 and the housing gland 32) and a limiting sleeve 412, which enhances the flexibility of the wire rotation in the presence of a large axial force between the swivel clip 1 and the wire 5.
In this embodiment, the rolling bearing 413 is an optional component, and the rolling bearing 413 may not be mounted on the roller 411 when the mechanical load borne by the rotation wire clip 1 in the axial direction is close to zero under various operation conditions of the power transmission line, which is not limited by the present application.
The roller 41 in the present invention is not limited to the present embodiment, for example, the roller 41 may be a shaft with two ends fixed and rolling in the middle, and any roller structure that can be considered by those skilled in the art may be used as the roller 41.
In one embodiment, as shown in fig. 3, a cylindrical protrusion C is provided at the middle of the outer wall of the inner casing 2. Wherein the cylindrical protrusions C are respectively in line contact with the respective rollers 41 and relatively rotate.
In one embodiment, as shown in fig. 3, a cylindrical recess D is provided in the middle of each of the limiting sleeves 412, which is matched with the cylindrical protrusion C. Wherein, the cylindrical protrusions C are respectively contacted with the cylindrical depressions D in a line and relatively rotated. The present application plays a role in restricting the axial displacement between the inner housing 2 and the outer housing 3 by the matching of the dimensions of the cylindrical protrusion C of the inner housing 2 and the cylindrical recess D of the restriction sleeve 412.
In one embodiment, as shown in fig. 6, the rotating portion 4 includes: the present application is not limited to the balls 42 and the ball limiting portions 43.
As shown in fig. 3, after the wire is assembled to the swivel clip 1 of the damper having weak rotational resistance, the wire 5 of the outer cover 21 is axially fastened and received in the inner cavity of the inner housing 2 (the inner housing 2 includes the first half 22 and the second half 23), and the outer wall of the inner housing 2 is axially in line contact with the limit bushing 412. When the wire 5, the protective layer 21 and the inner shell 2 rotate as a whole around the axial center line of the inner shell 2, relative displacement occurs between the outer wall of the inner shell 2 and the limiting shaft sleeves 412, and each limiting shaft sleeve 412 rolls along the outer wall of the inner shell 2, so that tangential acting force generated on the outer wall of the inner shell 2 is small, flexible rotation of the wire 5 in the rotary clamp 1 of the damper with weak rotation resistance is realized, more accurate description is that the wire 5, the protective layer 21 and the inner shell 2 are integrally rotated relative to the outer shell 3 (the outer shell 3 comprises a first half ring 31 and a second half ring 32) of the rotary clamp 1 of the damper with weak rotation resistance, thus the wire clamped by the rotary clamp 1 of the damper with weak rotation resistance has good rotation effect, and the beneficial effects of weakening eccentric ice coating formed by the wire under rainy and snowy weather conditions, inhibiting the galloping of the wire, and improving the safe operation level of a circuit and a power grid are realized.
Application scenario one
Fig. 7 is a schematic view of a damper 11 of a swing clamp 1 employing a damper with weak rotational resistance applied to a single conductor 8 of an overhead transmission line in cooperation with a suspension clamp 15 with weak rotational resistance, wherein the single conductor 8 is equivalent to the aforementioned conductor 5. As shown in fig. 7, 14 is an overhead ground wire, a suspension clamp 15 clamps the single conductor 8 and suspends the single conductor 8 to a line tower 13 via an insulator 16, and damper 11 is mounted on the single conductor 8 on both sides of the suspension clamp 15. The elements which are directly connected to the single wire 8 and affect the rotation effect of the single wire 8 include a suspension clamp 15 and a damper 11.
Fig. 8a, 8b and 8c are schematic diagrams of eccentric icing of three common wires. Fig. 9 is a simplified schematic illustration of a fan-shaped eccentric ice coating with an included angle of 180 °. In severe rain, snow and ice weather conditions, as shown in fig. 8a, 8b and 8c, the windward side of the single wire 8 will form an eccentric ice coating 18. As shown in fig. 9, the eccentric ice coating 18 will generate a torque M 1 on the single wire 8. As shown in fig. 9, h is the thickness of the eccentric ice coating, O is the center of the circle of the single wire 8, O' is the center of gravity of the eccentric ice coating 18, R is the radius of the single wire 8, R 1 is the moment arm of the eccentric ice coating 18 relative to the single wire 8, M 1 is the mass of the eccentric ice coating 18, and the expression of the torque M 1 is: m 1＝m1gR1.
Since the suspension clamp 15 with weak rotation resistance and the damper 11 of the swing clamp 1 using the damper with weak rotation resistance have small rotation resistance to the single wire 8, the single wire 8 clamped between the suspension clamp 15 and the damper 11 is rotated by the torque M 1 until the torque borne by the single wire 8 reaches equilibrium. With the rotation of the single conductor 8, the windward side of the single conductor is correspondingly changed, the changed windward side is continuously covered with ice to form new torque, and the single conductor 8 is further driven to rotate, the process is continuously repeated, and as shown in fig. 10, the single conductor 8 is finally formed into uniform annular ice-covered surfaces 19. The probability of the wire galloping caused by the annular icing 19 is greatly lower than that of the eccentric icing, so that the damper 11 of the rotary wire clamp 1 adopting the damper with weak rotation resistance plays a role in preventing the single wire of the overhead transmission line from galloping when being matched with the suspension wire clamp 15 with weak rotation resistance.
Application scene two
Fig. 11 is a schematic view of a split conductor applied to an overhead transmission line in cooperation with a damper 11 of a swing clamp 1 employing a damper of weak rotational resistance, a suspension clamp 15 of weak rotational resistance and a spacer 17 of weak rotational resistance, wherein each sub-conductor 8 of the split conductor is equivalent to the aforementioned conductor 5. As shown in fig. 11, 14 is an overhead ground wire, a suspension clamp 15 clamps each sub-conductor 8 of a split conductor and suspends each sub-conductor 8 of the split conductor to a line tower 13 via an insulator 16, a damper 11 is mounted on each sub-conductor 8 of the split conductor on both sides of the suspension clamp 15, and a spacer 17 is mounted every 45m along the split conductor to support and fix the sub-conductor 8. The elements which are directly connected to the sub-conductor 8 of the split conductor and influence the rotating effect of the sub-conductor include suspension clamps 15, vibration dampers 11 and spacers 17. In severe rain, snow and ice weather conditions, as shown in fig. 8a, 8b and 8c, the windward side of the subconductors will form eccentric ice coating 18, as shown in fig. 9, and the eccentric ice coating 18 will generate a torque M 1 on the subconductors. Since the suspension clamp 15 with weak rotation resistance, the damper 11 of the swing clamp 1 using damper with weak rotation resistance and the spacer 17 with weak rotation resistance are small in rotation resistance to the sub-wires, the torque M 1 will rotate the sub-wires clamped to the suspension clamp 15, damper 11 and spacer 17 until the torque borne by the sub-wires reaches equilibrium. With the rotation of the sub-conductor, the windward side of the sub-conductor is correspondingly changed, the changed windward side is continuously covered with ice to form new torque, and the sub-conductor is further driven to rotate continuously, as shown in fig. 10, each sub-conductor 8 of the split conductor is finally formed into uniform annular ice-covered 19, and the probability of the annular ice-covered 19 causing conductor galloping is greatly lower than that of eccentric ice-covered, so that the damper 11 of the rotary wire clamp 1 adopting the damper with weak rotation resistance plays a role in preventing the split conductor of the overhead transmission line from galloping by being matched with the suspension wire clamp 15 with weak rotation resistance and the spacer 17 with weak rotation resistance. As shown in fig. 9, h is the thickness of the eccentric ice coating, O is the center of each sub-conductor 8 of the split conductor, O' is the center of gravity of the eccentric ice coating 18, R is the radius of each sub-conductor 8 of the split conductor, R 1 is the moment arm of the eccentric ice coating 18 relative to each sub-conductor 8 of the split conductor, M 1 is the mass of the eccentric ice coating 18, and the expression of the torque M 1 is: m 1＝m1gR1.
Compared with the prior wire galloping prevention measures of the overhead transmission line, the invention has the remarkable advantages that: the damper 11 of the rotary wire clamp 1 with weak rotation resistance is applied to the wires of overhead transmission lines, and only replaces the original common damper without adding additional elements, namely without adding new stress concentration points on the wires, thereby being beneficial to avoiding the negative problems of fatigue and strand breakage of the wires of the lines.
The application provides a rotation wire clamp of a damper with weak rotation resistance, which comprises the following components: an inner shell, an outer shell and a rotating part, wherein the inner shell and the outer shell are used for clamping the wire; the inner shell penetrates through the cavity of the outer shell; an annular gap is formed between the inner shell and the outer shell, and the inner shell is not contacted with the outer shell; the axial center line of the inner shell coincides with the axial center line of the outer shell; the rotating part is arranged in the annular gap; the rotating part rotates relative to the inner shell. The application makes the wire clamped by the rotary wire clamp of the damper have good rotation effect through the rotation part, and is matched with the suspension wire clamp with weak rotation resistance and the spacer with weak rotation resistance for use, thereby weakening the uneven degree of wire icing under the weather conditions of rain, snow and ice, inhibiting the galloping of the wire and improving the safe operation level of the circuit and the power grid.
It will be appreciated by those skilled in the art that embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The principles and embodiments of the present invention have been described in detail with reference to specific examples, which are provided to facilitate understanding of the method and core ideas of the present invention; meanwhile, as those skilled in the art will have variations in the specific embodiments and application scope in accordance with the ideas of the present invention, the present description should not be construed as limiting the present invention in view of the above.
Claims (8)
1. A swivel clip of a damper with weak rotational resistance, comprising: an inner shell, an outer shell and a rotating part, wherein the inner shell and the outer shell are used for clamping wires, and the rotating part is arranged between the inner shell and the outer shell;
The inner shell penetrates through the cavity of the outer shell; an annular gap is formed between the inner shell and the outer shell, and the inner shell is not contacted with the outer shell; the axial center line of the inner shell coincides with the axial center line of the outer shell;
the rotating part is arranged in the annular gap; the rotating part rotates relative to the inner shell;
the rotating part includes: a plurality of rollers;
The rolling shafts are uniformly arranged in the annular gap in parallel with the axial center line of the inner shell, and two ends of each rolling shaft are respectively embedded in the inner wall of the outer shell;
each roller is in line contact with the inner shell and rotates relatively;
The roller includes: a plurality of rollers and a plurality of limiting shaft sleeves;
the rollers are uniformly arranged in the annular gap parallel to the axial center line of the inner shell, and two ends of each roller are respectively embedded in the inner wall of the outer shell;
Each limiting shaft sleeve is sleeved on one roller respectively, and each limiting shaft sleeve is in line contact with the inner shell and rotates relatively to the inner shell respectively, and a cylindrical bulge is arranged in the middle of the inner shell; the cylindrical protrusions are in line contact with the rolling shafts respectively and rotate relatively, and the middle parts of the limiting shaft sleeves are provided with cylindrical recesses matched with the cylindrical protrusions respectively; the cylindrical protrusions are respectively contacted with the cylindrical concave lines and rotate relatively; the limiting shaft sleeve is also used for limiting the axial displacement between the inner shell and the outer shell;
The roller further includes: a plurality of rolling bearings;
The two ends of each roller are respectively sleeved with a rolling bearing;
each rolling bearing is positioned between the inner wall of the shell and one limiting shaft sleeve, and the rolling bearing can enhance the flexibility of the rotation of the lead when a large axial acting force exists between the rotary wire clamp and the lead.
2. The swivel clamp of claim 1, wherein the inner housing comprises: a first half and a second half;
The first half and the second half are fastened into a whole through a plurality of bolts.
3. The swivel clamp of claim 1, wherein the inner housing is hollow cylindrical.
4. The swivel clamp of claim 1, wherein the housing comprises: a housing body and a housing gland;
the first end of the shell main body is connected with the first end of the shell gland through a rotating shaft;
The second end of the shell main body and the second end of the shell gland are fastened into a whole through bolts.
5. The swivel clamp of claim 4, further comprising: and a damper interface fixedly connected to the second end of the housing body.
6. The swivel clamp of claim 1, wherein the number of rollers is at least 3; the number of the limiting shaft sleeves is at least 3; the number of the rolling bearings is at least 6.
7. The swivel clamp of claim 1 wherein a protective layer is disposed within the inner housing; the protective layer includes: rubber pad or aluminum tape.
8. A damper comprising a hammer body and a swing wire clip of the damper of weak rotational resistance according to any one of claims 1 to 7; the hammer body is connected with the rotary wire clamp.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910354177.4A CN109994982B (en) | 2019-04-29 | 2019-04-29 | Rotation wire clamp of damper with weak rotation resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910354177.4A CN109994982B (en) | 2019-04-29 | 2019-04-29 | Rotation wire clamp of damper with weak rotation resistance |
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| CN109994982A CN109994982A (en) | 2019-07-09 |
| CN109994982B true CN109994982B (en) | 2024-05-28 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110011254A (en) * | 2019-04-29 | 2019-07-12 | 华北电力科学研究院有限责任公司 | A kind of rotatable suspension clamp of conducting wire |
| CN111769504B (en) * | 2020-08-07 | 2021-08-27 | 湖州浪佩智能科技有限公司 | Easy-to-install damper for overhead wire |
| CN117438995B (en) * | 2023-10-24 | 2024-06-14 | 哈尔滨工业大学 | Omnidirectional vibration suppression self-power supply device for high-voltage transmission conductor |
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| CN209823364U (en) * | 2019-04-29 | 2019-12-20 | 华北电力科学研究院有限责任公司 | Rotary wire clamp of damper with weak rotation resistance |
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| CA400270A (en) * | 1941-10-28 | J. Taylor John | Conductor clamp | |
| JPH04299014A (en) * | 1991-03-28 | 1992-10-22 | Tatsuta Electric Wire & Cable Co Ltd | Method for processing cable with support wire in connecting terminal box |
| JPH0833172A (en) * | 1994-07-11 | 1996-02-02 | Fujikura Ltd | Vibrationproof suspension clamp |
| JP2006223064A (en) * | 2005-02-10 | 2006-08-24 | Asahi Electric Works Ltd | Device for preventing snow accretion and torsion, and method for preventing snow accretion and galloping |
| CN201294358Y (en) * | 2008-08-05 | 2009-08-19 | 上海艾迪欧电力防振金具有限公司 | Ice-proof suspension clamp capable of automatically adjusting tension |
| CN201766334U (en) * | 2010-09-01 | 2011-03-16 | 固力发集团有限公司 | Interval rod rotary wire clamp |
| CN202103391U (en) * | 2011-05-13 | 2012-01-04 | 江苏华厦电力成套设备有限公司 | Connecting structure for bundled conductors of novel spacing rod |
| CN103208768A (en) * | 2012-03-28 | 2013-07-17 | 国家电网公司 | Method for suppressing waving of extra-high voltage bundled conductor |
| CN102684125A (en) * | 2012-05-31 | 2012-09-19 | 江苏双汇电力发展股份有限公司 | Preformed armour rod rotation chuck-type shockproof hammer |
| CN204361640U (en) * | 2015-01-23 | 2015-05-27 | 中国电力工程顾问集团中南电力设计院有限公司 | Endless-rotating angle Anti-swing spacing bar wire clamp |
| CN204633286U (en) * | 2015-04-22 | 2015-09-09 | 浙江泰昌实业有限公司 | Anti-dance damp type revolution wire clamp |
| CN209823364U (en) * | 2019-04-29 | 2019-12-20 | 华北电力科学研究院有限责任公司 | Rotary wire clamp of damper with weak rotation resistance |
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