CN114498502B - Noise suppression subassembly of high-voltage bus and bus barrel - Google Patents
Noise suppression subassembly of high-voltage bus and bus barrel Download PDFInfo
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- CN114498502B CN114498502B CN202111574650.3A CN202111574650A CN114498502B CN 114498502 B CN114498502 B CN 114498502B CN 202111574650 A CN202111574650 A CN 202111574650A CN 114498502 B CN114498502 B CN 114498502B
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- barrel
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- 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
- H02G5/00—Installations of bus-bars
- H02G5/06—Totally-enclosed installations, e.g. in metal casings
- H02G5/061—Tubular casings
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
- G10K11/00—Methods or devices for transmitting, conducting or directing sound in general; Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/16—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general
- G10K11/172—Methods or devices for protecting against, or for damping, noise or other acoustic waves in general using resonance effects
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B1/00—Frameworks, boards, panels, desks, casings; Details of substations or switching arrangements
- H02B1/20—Bus-bar or other wiring layouts, e.g. in cubicles, in switchyards
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02B—BOARDS, SUBSTATIONS OR SWITCHING ARRANGEMENTS FOR THE SUPPLY OR DISTRIBUTION OF ELECTRIC POWER
- H02B13/00—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle
- H02B13/02—Arrangement of switchgear in which switches are enclosed in, or structurally associated with, a casing, e.g. cubicle with metal casing
- H02B13/035—Gas-insulated switchgear
- H02B13/0358—Connections to in or out conductors
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Installation Of Bus-Bars (AREA)
- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention belongs to the field of high-voltage buses, and particularly relates to a high-voltage bus and a noise suppression assembly of a bus barrel. A noise suppression assembly of a bus tube comprises a conductive shielding tube arranged in the bus tube or a conductive shielding plate distributed on the inner side of the tube wall of the bus tube along the circumferential direction of the bus tube, wherein sound absorption holes are distributed in the conductive shielding tube or the conductive shielding plate; a conductive connecting structure used for electrically connecting the conductive shielding cylinder or the conductive shielding plate with the bus cylinder body in a conductive manner is arranged between the conductive shielding cylinder or the conductive shielding plate and the bus cylinder body, so that the problems of large vibration and noise when the bus cylinder body is used in the prior art are solved.
Description
Technical Field
The invention belongs to the field of high-voltage buses, and particularly relates to a noise suppression assembly of a bus barrel.
Background
In recent years, with the increasing number of extra-high voltage GIS power stations added in related industries, the problem of vibration abnormal sound of a high-voltage bus in GIS equipment fed back by a user is increased in field use, and the problem of vibration abnormal sound of the high-voltage bus of 800kV is particularly obvious. The vibration not only generates noise, but also affects the operation of the high-voltage bus. For example, alternating loads from long-term vibration exposure of the high voltage bus may cause micro-cracks on the high voltage bus components to propagate, such that the components fail, particularly when the components are cast or welded. For another example, long-term alternating loads can also cause the bolt pre-tightening force to be loose, resulting in connection failure of the threaded connector on the high-voltage bus. In addition, the vibration may cause the friction between the parts on the high voltage bus bar to generate metal debris, thereby reducing the insulation effect.
For high voltage busbars, the source of vibration is mainly two-fold: firstly, the basic structure of the high-voltage bus can be simplified into a central conductor, an insulating medium and a bus tube body, wherein high-voltage alternating current flows through the central conductor, the bus tube body is a thin-wall shell for bearing the grounding of the high-voltage central conductor, and the insulating medium isolates the central conductor from the bus tube body. Macroscopically, the high voltage bus is actually a large capacitor, and the center conductor and the bus tube are equivalent to the two end plates of the capacitor. When an ac voltage is applied to the capacitor, an ac current will flow through the capacitor, and an electrostatic force will be generated between the electrodes, the electrostatic force being expressed by the following equation:
it can be seen that the magnitude of the electrostatic force F is related to the voltage U and the inter-plate distance d, when an alternating current is applied to the center conductor, an alternating voltage is generated between the bus bar cylinder and the center conductor, and an alternating electrostatic force is generated between the two, thereby causing vibration of the external bus bar cylinder.
Next, in order to shield the internal electric field intensity of the high-voltage bus bar, a shield cover is generally used to surround and shield irregular parts. The shield itself is also a thin-walled structure that when a high voltage alternating current flows through the center conductor, it also acts as a capacitor plate, thereby producing an alternating electrostatic force. The shield can generates vibration and noise under the action of electrostatic force. Noise propagates through the insulating gas in the high pressure gas chamber to the bus bar barrel, causing the bus bar barrel to vibrate.
For the noise problem caused by vibration, the prior art often adopts a shielding part with a mesh structure, for example, a deceleration motor for lifting and citing of a stereo garage disclosed in patent document CN214799142U, adopts a resonance sound absorption cylinder provided with through holes arranged in an array between a cylinder body and a shell, the interval between the resonance sound absorption cylinder and the shell of the motor and the through holes on the sound absorption cylinder body can form an infinite number of continuous single helmholtz resonators, and utilizes the principle that air in the through holes vibrates back and forth to have frictional damping to consume sound energy, thereby achieving the effective effects of shock absorption and sound absorption.
If the resonance sound absorption cylinder with the through holes is arranged inside the bus tube body to reduce noise, although the noise generated by the shielding cover in the resonance sound absorption cylinder can be restrained from spreading outwards, the resonance sound absorption cylinder cannot restrain the noise positioned at the radial outer part of the resonance sound absorption cylinder, and part of the noise of the bus tube body is formed by the vibration of the bus tube body, so that the noise generated by the bus tube body positioned at the outer part of the resonance sound absorption cylinder cannot be restrained, and the resonance sound absorption cylinder in the prior art has limited performance for restraining the noise of the high-voltage bus. The vibration of parts, which is a source of noise generation, cannot be eliminated, and the problems of micro-crack propagation, bolt looseness and easy generation of metal chips caused by vibration cannot be solved.
Disclosure of Invention
The invention aims to provide a high-voltage bus and a noise suppression assembly of a bus barrel, which can solve the problems of vibration and high noise when the bus barrel in the prior art is used.
In order to solve the problems, the technical scheme provided by the invention is as follows:
a noise suppression assembly of a bus tube comprises a conductive shielding tube arranged in the bus tube or a conductive shielding plate distributed on the inner side of the tube wall of the bus tube along the circumferential direction of the bus tube, wherein sound absorption holes are distributed in the conductive shielding tube or the conductive shielding plate; and a conductive connection structure for electrically connecting the conductive shielding cylinder or the conductive shielding plate with the bus tube body is arranged between the conductive shielding cylinder or the conductive shielding plate and the bus tube body.
Has the advantages that: the conductive shielding cylinder which is arranged in the bus cylinder body and is distributed with the sound absorption holes can form a gap between the support piece and the cylinder wall of the bus cylinder body, so that a resonance sound absorption structure is formed, and the noise generated in the bus cylinder body is inhibited.
Further, the conductive connecting structure is disposed in a space between the conductive shielding cylinder and the bus bar cylinder.
Has the advantages that: the conductive connection structure is arranged in the interval between the conductive shielding cylinder and the bus cylinder body, and the conductive connection structure does not need to be arranged at other positions, so that the structure of the device is simplified.
Furthermore, the supporting piece is a support with an external thread, a supporting head is connected to the support through a thread, and the top surface of the supporting head is a curved surface used for supporting the inner wall of the busbar cylinder.
Has the advantages that: the supporting piece comprises a support with external threads and a supporting head screwed on the support, so that the structure is simple and the manufacturing is convenient; the surface of the supporting head is a curved surface, so that the inner surface of the bus tube body can be prevented from being scratched in the process of installing the conductive shielding tube into the bus tube body.
Further, the holder is fixed to an outer peripheral surface of the conductive shielding cylinder.
Has the advantages that: the support is fixed on the peripheral surface of the conductive shielding cylinder, the position between the conductive shielding cylinder and the bus cylinder is adjusted by adjusting the screwing depth of the support head screwed on the support seat, the conductive shielding layer is easily assembled on the bus cylinder, and the structure of the device is simplified.
The support and the support head are made of conductive materials, and the conductive connection structure is formed by the support and the support head.
Has the advantages that: the support and the support head are made of conductive materials, and can be supported to be made into a conductive connecting piece, so that conductive connection between the conductive shielding cylinder and the bus cylinder body is realized.
The conductive shielding cylinder is a flexible cylinder capable of being elastically bent.
Has the beneficial effects that: the conductive shielding cylinder adopts the flexible cylinder which can be elastically bent, so that the conductive shielding cylinder can be conveniently assembled into the bus cylinder body in a bending mode, and the installation is convenient.
The conductive shielding cylinder or the conductive shielding plate is made of metal.
Has the beneficial effects that: the conductive shielding cylinder or the conductive shielding plate made of metal has good through-current performance and low cost.
Further, the conductive shielding cylinder or the conductive shielding plate is aluminum.
The high-voltage bus comprises a bus barrel and a noise suppression assembly, wherein the noise suppression assembly of the bus barrel comprises a conductive shielding barrel arranged in the bus barrel or a conductive shielding plate distributed on the inner side of the barrel wall of the bus barrel along the circumferential direction of the bus barrel, sound absorption holes are distributed on the conductive shielding barrel or the conductive shielding plate, a support piece is arranged on the conductive shielding barrel or the conductive shielding plate, the support piece is used for enabling a gap to be formed between the conductive shielding barrel or the conductive shielding plate and the barrel wall of the bus barrel, and the gap and the sound absorption holes jointly form a resonance sound absorption structure; and a conductive connection structure for electrically connecting the conductive shielding cylinder or the conductive shielding plate with the bus tube body is arranged between the conductive shielding cylinder or the conductive shielding plate and the bus tube body.
Has the beneficial effects that: the conductive shielding cylinder which is arranged in the bus cylinder body and is distributed with the sound absorption holes can form a gap between the support piece and the cylinder wall of the bus cylinder body, so that a resonance sound absorption structure is formed, and the noise generated in the bus cylinder body is inhibited.
Further, the conductive connecting structure is disposed in a space between the conductive shielding cylinder and the bus bar cylinder.
Has the beneficial effects that: the conductive connection structure is arranged in the interval between the conductive shielding cylinder and the bus cylinder body, and the conductive connection structure does not need to be arranged at other positions, so that the structure of the device is simplified.
Furthermore, the supporting piece is a support with an external thread, a supporting head is connected to the support through a thread, and the top surface of the supporting head is a curved surface used for supporting the inner wall of the busbar cylinder body.
Has the beneficial effects that: the supporting piece comprises a support with external threads and a supporting head screwed on the support, so that the structure is simple and the manufacturing is convenient; the curved surface of the supporting head can avoid scratching the inner surface of the bus tube body in the process of installing the conductive shielding tube into the bus tube body.
Further, the holder is fixed to an outer peripheral surface of the conductive shielding cylinder.
Has the advantages that: the support is fixed on the peripheral surface of the conductive shielding cylinder, the position between the conductive shielding cylinder and the bus cylinder is adjusted by adjusting the screwing depth of the support head screwed on the support seat, the conductive shielding layer is easily assembled on the bus cylinder, and the structure of the device is simplified.
The support and the support head are made of conductive materials, and the conductive connection structure is formed by the support and the support head.
Has the beneficial effects that: the support and the support head are made of conductive materials, and can be supported to be made into a conductive connecting piece, so that conductive connection between the conductive shielding cylinder and the bus cylinder body is realized.
The conductive shielding cylinder is a flexible cylinder capable of being elastically bent.
Has the beneficial effects that: the conductive shielding cylinder is a flexible cylinder capable of being bent elastically, so that the conductive shielding cylinder can be conveniently installed in the bus cylinder body in a bending mode.
The conductive shielding cylinder or the conductive shielding plate is made of metal.
Has the beneficial effects that: the conductive shielding cylinder or the conductive shielding plate made of metal has good through-current performance and low cost.
Further, the conductive shielding cylinder or the conductive shielding plate is aluminum.
Furthermore, at least one part of the left end and the right end of the shielding cover is shielded by the conductive shielding cylinder or the conductive shielding plate along the radial direction of the bus cylinder.
Has the advantages that: the conductive shielding cylinder covers the outer side of the shielding cover, so that the noise generated by the vibration of the shielding cover can be prevented from being transmitted outwards through the insulating gas of the high-pressure gas chamber, and the noise suppression effect can be improved.
Furthermore, the high-voltage bus comprises a central conductor arranged in the bus cylinder body and high-pressure air chamber partition plates arranged at two ends of the bus cylinder body, the central conductor is connected to the high-pressure air chamber partition plates, a shielding cover is arranged at the joint of the central conductor and the high-pressure air chamber partition plates, and at least one part of the shielding cover is radially shielded by a conductive shielding cylinder or a conductive shielding plate along the bus cylinder.
Has the advantages that: by adopting the scheme, the conductive shielding cylinder cover can cover the shielding cover, so that the noise generated by the vibration of the shielding cover is favorably prevented from being transmitted outwards through the insulating gas of the high-pressure gas chamber, and the noise suppression effect is favorably improved.
Drawings
FIG. 1 is a schematic structural view of a high voltage bus bar according to the present invention;
FIG. 2 isbase:Sub>A cross-sectional view taken along A-A of FIG. 1;
FIG. 3 is a schematic view of the conductive shielding can of the present invention when deployed;
FIG. 4 is a schematic structural view of the supporting member of the present invention.
Names of components corresponding to corresponding reference numerals in the drawings are:
1. a bus bar barrel; 11. an end flange; 2. a high pressure air chamber partition; 3. a center conductor; 4. a shield case; 5. a conductive shielding can; 51. a sound absorbing aperture; 6. a support member; 61. a support; 62. a support head; 7. a resonant cavity; 8. a high pressure gas chamber.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the detailed description and specific examples, while indicating embodiments of the invention, are given by way of illustration only, not by way of limitation, i.e., the embodiments described are intended as a selection of the best mode contemplated for carrying out the invention, not as a full mode. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
It is to be noted that, in the embodiments of the present invention, relational terms such as "first" and "second", and the like, which may be present in the terms of the first and second, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, terms such as "comprises," "comprising," or any other variation thereof, which may be present, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the possible occurrence of the phrases "comprising a limited element of '8230', \8230;" 8230; "etc. does not exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" when they are used are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be connected internally or indirectly to each other. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
In the description of the invention, unless otherwise explicitly specified or limited, the term "provided" should be understood broadly, for example, the object provided may be a part of the body, or may be arranged separately from the body and connected to the body, which may or may not be detachable. The specific meaning of the above terms in the present invention can be understood by those skilled in the art from specific situations.
The present invention will be described in further detail with reference to examples.
Example 1 of a high voltage bus bar in the invention:
as shown in fig. 1 and 2, the high-voltage bus includes a bus barrel 1, the bus barrel 1 is a hollow cylinder, end flanges 11 are provided at two ends of the bus barrel 1, and the end flanges 11 are used for connecting with other bus barrels arranged separately. A circular high-pressure air chamber partition plate 2 is arranged between the bus tube body 1 and other bus tube bodies which are arranged in a split mode, and the high-pressure air chamber partition plate 2 is fixedly clamped between the end flange 11 end faces of the two bus tube bodies 1, so that a high-pressure air chamber 8 is formed between the two ends of each bus tube body 1. An insert for the conductive connection of the rod-shaped central conductor 3 is also arranged in the middle of the high-pressure air chamber partition plate 2. The central conductor 3 is connected on the high-pressure air chamber partition plate 2, and the junction with the high-pressure air chamber partition plate 2 is equipped with the shield cover 4, at least a part of the shield cover 4 is radially sheltered from by the conductive shielding cylinder 5 along the bus-bar cylinder body 1, and the shield cover 4 extends out from the both ends of the high-pressure air chamber partition plate 2, surrounds around the irregular parts near the central conductor 3, plays the effect of shielding electric field intensity.
As shown in fig. 1 and fig. 2, a conductive shielding cylinder 7 is also fixedly installed in the bus bar barrel 1, and the conductive shielding cylinder 7 covers the central conductor 3 inside the high-pressure air chamber 8 of the whole bus bar barrel 1 and all the components including the shielding cover 4 near the central conductor 3. The conductive shielding cylinder 5 is made of flexible metal material, in this embodiment, aluminum, and is provided with sound absorbing holes 51 in an array as shown in fig. 3, and is finally mounted in the bus bar cylinder 1 in a rolled cylindrical manner.
As shown in fig. 1 and 2, the bus bar housing 1 and the conductive shielding can 5 are connected by a support member 6. As shown in fig. 4, the support member 6 includes a support 61 fixed to the outer peripheral surface of the conductive shielding cylinder 5 and a support head 62 screwed to the support 61. Specifically, the support 61 is a screw, the head of which is welded and fixed on the outer circumferential surface of the conductive shielding cylinder 5, and the other end of which is provided with an external thread for forming a threaded connection with the support head 62. The supporting head 62 is connected to the support 61 by a screw thread, and the top end of the supporting head 62 is a ball head for supporting the inner wall of the bus bar barrel 1 and forming a resonant cavity 7 between the bus bar barrel 1 and the conductive shielding barrel 5. The support 61 and the support head 62 are made of conductive materials, and the conductive connecting piece is formed by the support 61 and the support head 62 and used for realizing conductive connection between the bus bar barrel 1 and the conductive shielding barrel 5. Of course, in other embodiments, the conductive connection member may be replaced by other forms and independent of the support member 6, for example, a conductive bar may be provided at both ends of the conductive shielding cylinder 5, and electrically connected to the end of the bus bar body 1 by the conductive bar, in a structure similar to the particle trap in the bus bar body 1.
In this embodiment, the sound absorption holes 51 are micro-perforated holes, and have large structural damping, so that a large amount of vibration can be absorbed. The sound absorption hole 51 and the resonant cavity 7 resonate together to absorb sound, and the bandwidth and the center frequency of sound absorption can be changed by changing the structural size and the installation position of the conductive shielding cylinder 5, so that the influence on a high-voltage bus caused by vibration caused by electrostatic force generated by alternating current with harmonic waves of different frequencies in a current system can be dealt with.
During operation, the conductive shielding cylinder 5 arranged in the bus cylinder body can achieve the following effects:
first, the conductive shielding cylinder 5 is connected to the bus cylinder flange 11 through a conductive connection structure, so that the conductive shielding cylinder 5 and the bus cylinder 1 form an equipotential connection, and thus the conductive shielding cylinder 5 becomes a capacitor plate, and when a capacitive current flows through the capacitor plate, the conductive shielding cylinder 5 is vibrated by an electrostatic force. Because a large number of micro-perforated holes are designed on the conductive shielding cylinder 5, the vibration can be absorbed, and compared with the original bus cylinder 1, the vibration noise is greatly reduced.
Secondly, the conductive shielding cylinder 5 covers the central conductor 3 in the internal high-pressure air chamber 8 of the whole bus bar cylinder 1 and all the components near the central conductor 3 including the shielding cover 4, so that the conductive shielding cylinder 5 and the resonance cavity 7 together can block the noise generated by the shielding cover 4 to prevent the noise from being transmitted to the bus bar cylinder 1.
Example 2 of the high voltage bus bar of the invention:
the present embodiment is different from embodiment 1 in that: in embodiment 1, the conductive shielding tube or the conductive shielding plate is made of a metal material. In this embodiment, the conductive shielding cylinder is made of a non-metallic material capable of conducting electricity. The non-metallic conductive material is selected by those skilled in the art from existing products and will not be described in detail herein.
Example 3 of the high voltage bus bar of the present invention:
the present embodiment is different from embodiment 1 in that: in embodiment 1, the supporting member is a support with an external thread, the support is connected with a supporting head through a thread, and the top end of the supporting head is supported on the inner wall of the bus barrel. In this embodiment, a fixing nut is disposed on the outer circumferential surface of the conductive shielding cylinder, the fixing nut forms a support, the support head is a screw connected to the fixing nut through a thread, and the top end of the screw is used for supporting the inner wall of the bus cylinder.
Example 4 of the high voltage bus bar of the invention:
the present embodiment is different from embodiment 1 in that: in embodiment 1, the top surface of the support head is a spherical surface for supporting on the inner wall of the bus bar cylinder. In this embodiment, the top surface of the supporting head is a circular arc surface.
Example 5 of the high voltage bus bar of the present invention:
the present embodiment is different from embodiment 1 in that: in embodiment 1, the surface of the support head is a spherical surface for supporting the inner wall of the bus bar cylinder. In this embodiment, the top surface of the support head is an elliptical surface.
Example 6 of the high voltage bus bar of the present invention:
the present embodiment is different from embodiment 1 in that: in example 1, the conductive shielding cylinders are distributed over the entire bus bar body. In this embodiment, the conductive shielding can is disposed in segments within the bus bar housing.
Example 7 of the high voltage bus bar of the present invention:
the present embodiment is different from embodiment 1 in that: in embodiment 1, the support member is disposed in the space between the conductive shielding can and the bus bar can. In this embodiment, the supporting member is disposed between the two axial ends of the conductive shielding cylinder and the cylinder flange.
Example 8 of the high voltage bus bar of the present invention:
the present embodiment is different from embodiment 1 in that: in example 1, a conductive shield tube was provided inside the bus bar tube. In this embodiment, the bus bar barrel is provided with the conductive shielding plates distributed on the inner side of the barrel wall of the bus bar barrel along the circumferential direction of the bus bar barrel.
The embodiment of the noise suppression assembly for a bus bar cylinder in the present invention, that is, the noise suppression assembly in any embodiment of the high voltage bus bar, is not described herein again.
The above description is only a preferred embodiment of the present invention, and not intended to limit the present invention, the scope of the present invention is defined by the appended claims, and all structural changes that can be made by using the contents of the description and the drawings of the present invention are intended to be embraced therein.
Claims (10)
1. A noise suppression subassembly of generating line barrel which characterized in that: the bus tube comprises a conductive shielding tube (5) arranged in a bus tube body (1) or a conductive shielding plate distributed on the inner side of the tube wall of the bus tube body (1) along the circumferential direction of the bus tube body (1), sound absorption holes (51) are distributed on the conductive shielding tube (5) or the conductive shielding plate, a support piece (6) is arranged on the conductive shielding tube (5) or the conductive shielding plate, the support piece (6) is used for enabling the conductive shielding tube (5) or the conductive shielding plate and the tube wall of the bus tube body (1) to form a space, and the space and the sound absorption holes (51) form a resonance sound absorption structure together; and a conductive connection structure for conductively connecting the conductive shielding cylinder (5) or the conductive shielding plate with the bus cylinder (1) is arranged between the conductive shielding cylinder (5) or the conductive shielding plate and the bus cylinder (1).
2. The noise dampening assembly of a bus bar housing of claim 1, wherein: the conductive connection structure is arranged in the interval between the conductive shielding cylinder (5) and the bus cylinder body (1).
3. The noise dampening assembly of a bus bar housing according to claim 2, wherein: the support piece is threaded support (61), threaded connection has support head (62) on support (61), the top surface of support head (62) is for being used for supporting the curved surface at the inner wall of generating line barrel (1).
4. A bus duct noise dampening assembly as defined in claim 3, wherein: the support (61) is fixed on the peripheral surface of the conductive shielding cylinder (5).
5. A bus duct noise dampening assembly as defined in claim 3, wherein: the support base (61) and the support head (62) are made of conductive materials, and the conductive connection structure is formed by the support base (61) and the support head (62).
6. The noise dampening assembly of a bus bar barrel according to claim 1 or 2, wherein: the conductive shielding cylinder (5) is a flexible cylinder which can be elastically bent.
7. The noise dampening assembly of a bus bar barrel according to claim 1 or 2, wherein: the conductive shielding cylinder (5) or the conductive shielding plate is made of metal.
8. The noise dampening assembly of a bus bar housing of claim 7, wherein: the conductive shielding cylinder (5) or the conductive shielding plate is made of aluminum.
9. High-voltage bus, its characterized in that: noise dampening assembly comprising a bus bar barrel (1) and a bus bar barrel (1) according to any of claims 1 to 8.
10. The high voltage bus bar of claim 9 wherein: the high-voltage bus comprises a central conductor (3) arranged in a bus barrel and high-pressure air chamber partition plates (2) arranged at two ends of the bus barrel (1), the central conductor (3) is connected to the high-pressure air chamber partition plates (2), shielding covers (4) are arranged at the joints of the central conductor and the high-pressure air chamber partition plates (2), and at least one part of each shielding cover (4) is radially shielded by a conductive shielding barrel (5) or a conductive shielding plate along the high-voltage bus barrel.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111574650.3A CN114498502B (en) | 2021-12-21 | 2021-12-21 | Noise suppression subassembly of high-voltage bus and bus barrel |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111574650.3A CN114498502B (en) | 2021-12-21 | 2021-12-21 | Noise suppression subassembly of high-voltage bus and bus barrel |
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| CN114498502A CN114498502A (en) | 2022-05-13 |
| CN114498502B true CN114498502B (en) | 2023-03-07 |
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| CN101329865A (en) * | 2007-06-18 | 2008-12-24 | 中国科学院声学研究所 | Resonance sound-absorbing structure for sheet |
| CN102926334A (en) * | 2011-08-09 | 2013-02-13 | 秦皇岛耀华玻璃钢股份公司 | Cup-shaped noise reduction and sound absorption member |
| CN203978561U (en) * | 2014-06-26 | 2014-12-03 | 江苏业安环保设备科技有限公司 | Low flow resistance wide band high-efficiency exhaust Mars extinguishes silencing apparatus |
| JP2016178720A (en) * | 2015-03-18 | 2016-10-06 | 矢崎総業株式会社 | Grommet |
| CN105390131A (en) * | 2015-12-10 | 2016-03-09 | 珠海格力电器股份有限公司 | Noise eliminator and electromechanical device |
| CN107238430A (en) * | 2017-05-27 | 2017-10-10 | 天府认证有限公司 | Can noise reduction piezoelectric vibration pickup |
| CN207339194U (en) * | 2017-11-08 | 2018-05-08 | 江苏超宇电气有限公司 | A kind of concentration bus duct with noise abatement moisture-proof function |
| CN112576336A (en) * | 2019-09-27 | 2021-03-30 | 江苏业安环保设备科技有限公司 | Spark extinguishing silencer with resonant cavity |
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