CN113066463A - Sound absorption and insulation structure for controlling sound vibration of transformer oil tank, transformer oil tank and transformer - Google Patents
Sound absorption and insulation structure for controlling sound vibration of transformer oil tank, transformer oil tank and transformer Download PDFInfo
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- CN113066463A CN113066463A CN202110309323.9A CN202110309323A CN113066463A CN 113066463 A CN113066463 A CN 113066463A CN 202110309323 A CN202110309323 A CN 202110309323A CN 113066463 A CN113066463 A CN 113066463A
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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
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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
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
- H01F27/10—Liquid cooling
- H01F27/12—Oil cooling
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/33—Arrangements for noise damping
Abstract
The invention provides a sound absorption and insulation structure for controlling sound vibration of a transformer oil tank, which comprises a composite sound absorption plate hung outside the oil tank, wherein a sound absorption sandwich plate is arranged outside at least one side plate of the composite sound absorption plate, and the sound absorption sandwich plate and the composite sound absorption plate are connected and fixed through a plurality of connecting pieces; when the vibration absorption sandwich plate is arranged on one side of the composite sound absorption plate, the vibration absorption sandwich plate and the composite sound absorption plate are arranged at intervals to form a first cavity between the vibration absorption sandwich plate and the composite sound absorption plate; when the vibration absorption sandwich plates are arranged on the two sides of the composite sound absorption plate, at least one vibration absorption sandwich plate and the composite sound absorption plate are arranged at intervals to form a second cavity on at least one side of the composite sound absorption plate. The sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank has good control effect of the medium-low frequency sound vibration and low noise reduction cost. The invention also provides a transformer oil tank adopting the sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank and a transformer adopting the transformer oil tank.
Description
Technical Field
The invention belongs to the technical field of transformers, and particularly relates to a sound absorption and insulation structure for controlling sound vibration of a transformer oil tank, the transformer oil tank and a transformer.
Background
The power transformer is an extremely important device in a transmission and distribution network of a power system, with the rapid development of the transmission and distribution network and the rapid reduction of the available space of an urban power grid, more and more transformer substations are distributed to an urban central area, which can affect the work and life of residents around the transformer substations to a certain extent, especially, the low-frequency noise of the power transformer directly affects the normal work and rest of the public, so in recent years, disputes and complaints related to the noise problem of the power transformer show a straight-line rising trend, and the situation becomes an urgent problem which must be faced and solved in the construction process of the urban power grid.
At present, the noise control technology for transformers is mainly divided into a noise propagation path control technology and a noise source control technology, wherein the noise propagation path control technology is a mode of reducing noise propagated to the outside of the transformer by adding a sound absorption material on a noise propagation path to absorb noise energy, and the mode has an obvious effect only on high-frequency noise and cannot effectively block the propagation of low-frequency noise; noise source control technique is the technique of making an uproar falls in the body, because the main tank wall vibration that derives from its oil tank of transformer noise, the tank wall vibration noise is reduced to the mode that adopts the increase tank wall thickness at present usually, experiments show that the actual sound insulation volume can increase four decibels when the oil tank wall thickness doubles, consequently, if want to realize the damping through the mode that increases tank wall thickness and fall the noise and need increase the wall thickness multiple times of oil tank, not only with high costs, still can lead to transformer oil tank bulky, weight is too high, can't adapt to the installation space condition of urban power grid.
Disclosure of Invention
The invention aims to provide a sound absorption and insulation structure for controlling sound vibration of a transformer oil tank, the transformer oil tank and a transformer, and aims to solve the problems of poor noise control effect and high noise reduction cost of the power transformer oil tank in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that: the sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank comprises a composite sound absorption plate which is used for being suspended on the outer box wall of the transformer oil tank, wherein a sound absorption sandwich plate is arranged outside at least one side plate of the composite sound absorption plate, and the sound absorption sandwich plate and the composite sound absorption plate are connected and fixed through a plurality of connecting pieces; when the vibration absorption sandwich plate is arranged outside one side plate of the composite sound absorption plate, the vibration absorption sandwich plate and the composite sound absorption plate are arranged at intervals to form a first cavity between the vibration absorption sandwich plate and the composite sound absorption plate; when the vibration absorption sandwich plates are arranged outside the two side plate surfaces of the composite sound absorption plate, at least one vibration absorption sandwich plate and the composite sound absorption plate are arranged at intervals to form a second cavity outside at least one side plate surface of the composite sound absorption plate.
As another embodiment of the present application, when the vibration absorbing sandwich plates are disposed outside both side plate surfaces of the composite sound absorbing plate, both the vibration absorbing sandwich plates and the composite sound absorbing plate are disposed at an interval to form the second cavity outside both side plate surfaces of the composite sound absorbing plate.
As another embodiment of the present application, the distance between the two vibration absorbing sandwich plates and the composite sound absorbing plate is different.
As another embodiment of the application, the vibration absorption sandwich board comprises two sound insulation boards which are arranged at intervals, and a periodic lattice structure which is arranged between the two sound insulation boards and is respectively connected with the two sound insulation boards.
As another embodiment of the present application, the periodic lattice structure is a plurality of steel members distributed in a periodic lattice sequence, and the steel members are structural members in which a plurality of steel bars are cross-connected into an X-shape, a pyramid shape, or a m-shape.
As another embodiment of the application, the thickness of the vibration absorption sandwich plate is 10-30 mm, and the thickness of the sound insulation plate is 1-3 mm.
As another embodiment of the present application, the composite sound absorbing panel includes at least two porous sound absorbing material panels stacked one on another, and at least one micro perforated film or micro perforated sheet interposed between the adjacent porous sound absorbing material panels, respectively.
As another embodiment of the application, the whole thickness of the sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank is less than 150 mm.
The sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank has the beneficial effects that: compared with the prior art, the sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank has the advantages that the composite sound absorption plate arranged at the periphery of the oil tank can absorb the noise in the middle and low frequency range, the vibration absorption sandwich plate can absorb the vibration waves generated by the vibration of the wall of the oil tank, thereby obstructing the vibration noise transmission of the oil tank, and simultaneously utilizing the first cavity at one side of the composite sound-absorbing board, or the second cavities at the two sides of the composite sound absorption plate can further improve the sound insulation effect, the thickness of the first cavity or the second cavity is set according to the sound vibration frequency band of the wall of the oil tank, thereby matching the sound insulation frequency band with the sound vibration frequency band of the oil tank, improving the noise suppression effect, and simple structure, occupation space is little, can be suitable for the transformer overall arrangement in city compact space, and compare in the mode that increases the thick vibration suppression of fuel tank wall, can reduce the acoustic vibration control cost of transformer.
The invention also provides a transformer oil tank, which comprises the sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank, has the same beneficial effects as the sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank, and is not repeated herein.
The invention also provides a transformer, which comprises the transformer oil tank and has the same beneficial effects as the transformer oil tank, and the details are not repeated.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a first schematic structural diagram of a sound absorption and insulation structure for controlling sound vibration of a transformer oil tank according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram ii of a sound absorption and insulation structure for controlling sound vibration of a transformer oil tank according to an embodiment of the present invention;
fig. 3 is a third schematic structural diagram of a sound absorption and insulation structure for controlling sound vibration of a transformer oil tank according to an embodiment of the present invention;
fig. 4 is a fourth schematic structural diagram of a sound absorption and insulation structure for controlling sound vibration of a transformer oil tank according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a sound absorption and insulation structure for controlling sound vibration of a transformer oil tank according to an embodiment of the present invention;
fig. 6 is a sixth schematic structural view of a sound absorption and insulation structure for controlling sound vibration of a transformer oil tank according to an embodiment of the present invention;
fig. 7 is a seventh schematic structural diagram of a sound absorption and insulation structure for controlling sound vibration of a transformer oil tank according to an embodiment of the present invention;
FIG. 8 is a schematic top view of the structure of FIG. 5;
FIG. 9 is a schematic top view of the structure of FIG. 6;
fig. 10 is a schematic top view of the structure of fig. 7.
In the figure: 1. a composite acoustic panel; 11. a porous sound absorbing material panel; 12. a micro-perforated sheet; 2. absorbing vibration of the sandwich panel; 21. a sound insulating board; 22. a periodic lattice structure; 3. a first cavity; 4. a second cavity; 5. a screw; 6. and a nut.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1 to 4 together, a sound absorption and insulation structure for controlling sound vibration of a transformer tank according to the present invention will be described. The sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank comprises a composite sound absorption plate 1 which is used for being suspended on the outer box wall of the transformer oil tank, wherein a vibration absorption sandwich plate 2 is arranged outside at least one side plate of the composite sound absorption plate 1, and the vibration absorption sandwich plate 2 and the composite sound absorption plate 1 are connected and fixed through a plurality of connecting pieces; when the vibration absorption sandwich plate 2 is arranged outside one side plate of the composite sound absorption plate 1, the vibration absorption sandwich plate 2 and the composite sound absorption plate 1 are arranged at intervals to form a first cavity 3 between the two; when the vibration absorption sandwich plates 2 are arranged outside the two side plate surfaces of the composite sound absorption plate 1, at least one vibration absorption sandwich plate 2 and the composite sound absorption plate 1 are arranged at intervals to form a second cavity 4 outside at least one side plate surface of the composite sound absorption plate 1.
The working principle of the sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank provided by the invention is as follows:
it should be understood that the manner of suspending the sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank provided by the invention on the outer wall of the transformer oil tank is the same as the manner of suspending the sound insulation plate outside the wall of the transformer oil tank for reducing the noise in the prior art, and the details are not repeated herein.
Firstly, the composite sound absorption plate 1 can be a plurality of layers of porous sound absorption plates 11 which are arranged in a stacked mode, each layer of porous sound absorption plate 11 can be the same sound absorption material or a plurality of different sound absorption materials, each sound absorption material only corresponds to one narrow noise frequency band, the noise frequency band of a transformer oil tank is considered, if the noise frequency band range of the oil tank is narrow, each layer of porous sound absorption plate 11 can select the corresponding same sound absorption material, and therefore noise in the frequency band range can be absorbed particularly; if the noise frequency range of the oil tank is wide, different sound absorption materials can be respectively selected for each layer of porous sound absorption material plate 11, so that the sound absorption frequency range of the composite sound absorption plate 1 is improved, and the sound absorption frequency range can completely cover the noise frequency range of the transformer oil tank;
secondly, the vibration absorbing sandwich plate 2 is a plate with a sandwich structure, the sandwich structure can be a simple cavity structure or a support structure distributed in an array, in short, the vibration absorbing sandwich plate 2 is a plate with a certain elastic modulus in the thickness direction, and the sandwich structure is a main factor for determining the elastic modulus, so that the concrete mode of the sandwich structure is set based on the acoustic vibration frequency band of the transformer oil tank, the elastic modulus of the vibration absorbing sandwich plate 2 is ensured to be matched with the elastic modulus, and the vibration absorbing sandwich plate 2 eliminates acoustic vibration waves generated by the tank wall vibration of the transformer oil tank, thereby blocking the acoustic vibration propagation of the transformer oil tank and playing a role of sound insulation and noise reduction;
furthermore, according to the installation space of transformer, especially to the installation space of transformer tank, the nimble selection is shaken the battenboard 2 in face one side or both sides setting of compound acoustic baffle 1, and the concrete mode is:
referring to fig. 1, if the installation space of the transformer oil tank is small, a vibration absorption sandwich plate 2 is arranged outside one side plate of a composite sound absorption plate 1, and a distance between the composite sound absorption plate 1 and the vibration absorption sandwich plate 2 needs to be correspondingly arranged according to a noise frequency band of the transformer oil tank, so that noise emitted by the transformer oil tank is absorbed by using a first cavity 3, it should be understood that the noise frequency band range of the transformer oil tank should be accurately tested before the thickness of the first cavity 3 is selected, and the most concentrated frequency band of the noise emitted by the transformer oil tank is ensured to be matched with the sound absorption frequency band of the first cavity 3, so as to improve the sound absorption effect of the first cavity 3;
referring to fig. 2, if the installation space of the transformer oil tank is sufficient, a mode of respectively arranging the vibration absorption sandwich plates 2 outside the two side plate surfaces of the composite sound absorption plate 1 may be preferentially adopted, and the intervals between the vibration absorption sandwich plates 2 and the composite sound absorption plate 1 also need to be set according to the noise frequency band of the transformer oil tank;
in addition, referring to fig. 3, in order to improve the range of the sound absorption frequency band interval, the two sound absorption sandwich plates 2 and the composite sound absorption plate 1 may be set to have different distances (i.e., the second cavities 4 on the two sides of the composite sound absorption plate 1 are set to have different thicknesses), so as to achieve a larger coverage area of the transformer oil tank noise frequency band interval and avoid noise leakage and propagation;
of course, referring to fig. 4, under the condition that the installation space is not allowed, one of the vibration absorbing sandwich panels 2 may be attached to the composite sound absorbing plate 1, and only the other vibration absorbing sandwich panel 2 is spaced from the composite sound absorbing plate 1 to form the second cavity 4 matched with the frequency band where the noise of the transformer oil tank is concentrated, so that the second cavity 4 can absorb most of the oil tank noise, and the noise leaked through the second cavity 4 can be absorbed and reduced by the vibration absorbing sandwich panel 2 attached to the composite sound absorbing plate 1, and compared with the mode of arranging the vibration absorbing sandwich panel 2 on one side, the noise reducing effect is better.
Compared with the prior art, the sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank provided by the invention has the advantages that the composite sound absorption plate 1 hung on the outer tank wall of the oil tank can absorb the noise in the middle and low frequency range, the vibration absorption sandwich plate 2 can absorb the vibration wave generated by the vibration of the tank wall of the oil tank so as to obstruct the transmission of the vibration noise of the oil tank, meanwhile, the vibration absorption sandwich plate 2 is arranged at one side of the composite sound absorption plate 1, the first cavity 3 is formed between the composite sound absorption plate 1 and the vibration absorption sandwich plate 2, or the vibration absorption sandwich plates 2 are arranged at both sides of the composite sound absorption plate 1 so as to form the second cavity 4 between the two vibration absorption sandwich plates 2 and the composite sound absorption plate 1, the sound absorption effect of the first cavity 3 or the second cavity 4 is utilized, the thickness of the first cavity 3 or the second cavity 4 is set according to the sound vibration frequency range of the oil tank wall, so that the sound insulation frequency range of the first cavity 3 or the second cavity 4 is matched with the, through the cooperation damping sound absorption effect of inhaling sandwich panel 2, compound acoustic baffle 1 and first cavity 3 or second cavity 4 of shaking, can improve noise suppression performance, and simple structure, occupation space is little, can be suitable for the transformer overall arrangement in city compact space, and compare in increasing the mode that the thick vibration suppression of carrying on of fuel tank wall, can reduce the sound vibration control cost of transformer.
Referring to fig. 2 and 3, when the vibration absorbing sandwich plates 2 are disposed outside both side plates of the composite sound absorbing plate 1, the two vibration absorbing sandwich plates 2 are disposed at intervals from the composite sound absorbing plate 1 to form the second cavities 4 outside both side plates of the composite sound absorbing plate 1.
When the vibration absorption sandwich plates 2 are arranged on two sides of the surface of the composite sound absorption plate 1, the second cavities 4 can be formed outside the two side plates of the composite sound absorption plate 1 respectively, the two second cavities 4 can be cavities with equal thickness or different thicknesses, the specific arrangement mode is determined according to the noise test result of the transformer oil tank, if the noise frequency band of the transformer oil tank is narrow and concentrated, the two second cavities 4 are arranged to be the same thickness suitable for absorbing the noise of the frequency band, so that the noise of the frequency band is completely absorbed under the combined action of the two second cavities 4, the noise leakage is avoided, and the sound insulation effect is improved; if the noise frequency band of transformer tank is wider, when the noise frequency band of single second cavity 4's sound absorption frequency band can't cover transformer tank's noise frequency band, should set up two second cavities 4 into different thickness to make two second cavities 4 cooperation in order to improve the coverage of sound absorption frequency band, avoid the noise leakage.
Specifically, referring to fig. 3, the two vibration absorbing sandwich plates 2 are different from the composite sound absorbing plate 1 in distance. That is to say, two are inhaled sandwich panel 2 and are thought to become two second cavities 4 that thickness is different with the both sides wall of compound acoustic baffle 1 respectively, because the cavity structure of specific thickness only can absorb to the noise of specific frequency channel, here through the cooperation of the second cavity 4 of two different thicknesses, can improve absorbable noise frequency channel scope, avoid the noise to leak to improve syllable-dividing noise reduction effect.
In addition, the connecting piece comprises a screw rod 5 fixedly arranged on the composite sound absorption plate 1 in a penetrating way and a plurality of nuts 6 screwed on the screw rod 5 at intervals along the axial direction of the screw rod 5; if one side of the composite sound absorption plate 1 is provided with the vibration absorption sandwich plate 2, one end of the screw rod 5 penetrates through the vibration absorption sandwich plate 2 and is matched with and clamps the vibration absorption sandwich plate 2 through two nuts 6; if the vibration absorption sandwich plates 2 are arranged on the two sides of the composite sound absorption plate 1, each vibration absorption sandwich plate 2 is clamped and fixed in a matching way through two nuts 6 positioned on the two sides of the vibration absorption sandwich plate.
The distance between the sandwich board 2 and the corresponding sound absorption board can be adjusted by rotating each nut 6, so that the thickness of the first cavity 3 or the second cavity 4 is adjusted, the sound absorption frequency band of the first cavity 3 or the second cavity 4 is matched with the noise frequency band of the transformer oil tank, the noise reduction effect is improved, the adjustment mode is simple, and the connection is stable and reliable.
As a specific implementation manner of the embodiment of the present invention, referring to fig. 1 to 10, the vibration absorbing sandwich panel 2 includes two sound insulation boards 21 disposed at intervals, and a periodic lattice structure 22 disposed between the two sound insulation boards 21 and respectively connected to the two sound insulation boards 21.
The acoustic panel 21 is made of a thin metal plate, and since a gap for providing the periodic lattice structure 22 is provided between two acoustic panels 21, therefore, a sound absorption cavity can be formed between the two sound insulation boards 21, the sound insulation boards 21 have the performance of absorbing and blocking middle and low frequency noise by matching with the sound absorption cavity, the periodic lattice structure 22 can play a role in vibration reduction, and the specific structure of the periodic lattice structure 22 can be set for the sound vibration frequency band of the transformer oil tank, so that the elastic modulus of the periodic lattice structure 22 generated by the two layers of sound insulation boards 21 is matched with the vibration wave frequency band of the transformer oil tank, so that the vibration waves can be absorbed by the periodic lattice structure 22 when reaching the baffle 21, the vibration reduction and absorption effect is good, therefore, inhale sandwich panel 2 that shakes and have sound insulation concurrently and inhale the dual function of shaking, can fall the noise from two dimensions of noise propagation path and noise source, compare in the mode effect of falling the noise of adopting the sound insulation board alone better.
Specifically, referring to fig. 5 to 10, the periodic lattice structure 22 is a plurality of steel members distributed in a periodic lattice sequence, and the steel members are a plurality of steel bars cross-connected into an X-shaped, pyramid-shaped or m-shaped structure.
It should be understood that the periodic lattice sequence refers to a group of cyclic features distributed according to a periodic rule, and specifically in this embodiment, refers to a group of steel members distributed according to a periodic rule, for example, N steel members arranged at equal intervals are a group, and the periodic lattice structure 22 includes a plurality of groups of steel members distributed in a matrix.
Because the steel members are distributed in a periodic lattice sequence, the vibration-absorbing sandwich plate 2 has stable elastic modulus, that is, the vibration-absorbing frequency ranges of all positions of the vibration-absorbing sandwich plate 2 can be ensured to be consistent, a vibration-absorbing weak area is avoided, and the sound-insulating and vibration-absorbing performance of the vibration-absorbing sandwich plate 2 is ensured to be stable; the specific structure of the steel member can determine the overall elastic modulus of the periodic lattice structure 22, and the specific structure selection of the steel member should be set according to the sound-vibration frequency spectrum characteristics of the transformer oil tank measured by tests, for example, the steel member with the X-shaped structure has a small elastic modulus (see fig. 5 and 8) and is suitable for matching the conditions of large amplitude and low vibration frequency of the wall of the transformer oil tank, and the steel member with the pyramid (see fig. 6 and 9) or the cross (see fig. 7 and 10) structure has a large elastic modulus and is suitable for matching the conditions of small amplitude and high vibration frequency of the wall of the transformer oil tank; through the steel members of different structures of nimble selection according to actual conditions to make periodic lattice structure 22 obtain the elastic modulus with transformer tank acoustic vibration spectral characteristic matching, can improve from the angle of restraining the noise source and inhale the effect of shaking and making an uproar, reduce transformer noise.
In the embodiment, the thickness of the vibration absorbing sandwich panel 2 is 10 to 30mm, and the thickness of the sound insulation panel 21 is 1 to 3 mm.
Since the vibration noise of the transformer oil tank is the middle and low frequency noise, the noise blocking rate of the sound insulation board 21 with the thickness of 1-3 mm to the middle and low frequency bands is high, and when the thickness of the vibration absorption sandwich board 2 is 10-30 mm, the thickness of the cavity formed between the two layers of sound insulation boards 21 is also suitable for absorbing the noise of the middle and low frequency bands, of course, in this range, the specific thicknesses of the sound insulation board 21 and the vibration absorption sandwich board 2 should be selected in a matching mode after the actual test of the sound vibration frequency spectrum characteristics of the transformer oil tank due to the fact that the thicknesses of the tank walls and the volumes of the oil tanks of different transformer oil tanks are different, and therefore the vibration absorption.
Referring to fig. 1 and 5, as a specific embodiment of the present invention, a composite sound absorbing panel 1 includes at least two porous sound absorbing material panels 11 stacked one on another, and at least one micro-perforated film or micro-perforated thin sheet 12 respectively interposed between the adjacent porous sound absorbing material panels 11. That is, referring to fig. 1, in the case of two porous sound-absorbing material plates 11, a micro-perforated film or a micro-perforated sheet 12 is interposed between the two porous sound-absorbing material plates 11, and referring to fig. 5, in the case of three or more porous sound-absorbing material plates 11, a micro-perforated film or a micro-perforated sheet 12 is interposed between at least two adjacent porous sound-absorbing material plates 11, or a micro-perforated film or a micro-perforated sheet 12 is interposed between every two adjacent porous sound-absorbing material plates 11.
Specifically, the porous sound absorption material plate 11 is a glass wool porous plate, a rock wool porous plate or a polyester fiber cotton porous plate, different plates have different medium and low frequency sound absorption frequency bands, and the specific selection is determined according to the noise frequency band of the transformer oil tank measured by a test; the micro-perforated film or the micro-perforated sheet 12 is a film type sound wave metamaterial (the sound metamaterial is a composite structure manufactured by manpower, the structural size unit of the sound wave metamaterial is far smaller than the wave length of the sound wave, when the sound wave is incident perpendicular to the plane of the film, the sound wave can be completely reflected and can not be penetrated as long as the incident frequency is matched with the resonance frequency of the mass block on the film, therefore, the frequency of equivalent negative mass density can be adjusted by adjusting the elastic modulus of the mass block and the film, the attenuation of the sound wave of a specific narrow frequency band is realized), the sound metamaterial has good high-frequency sound absorption performance, the micro-perforated film or the micro-perforated sheet 12 is clamped between the porous sound absorption material plates 11, the high-frequency sound absorption effect of the sound metamaterial can be improved on the premise of ensuring the low-frequency sound absorption performance, the leakage of high-frequency noise emitted by a transformer, the thickness, aperture and hole density of the micro-perforated film or the micro-perforated sheet 12 are directly related to the sound absorption frequency band, so the specific parameters of the micro-perforated film or the micro-perforated sheet 12 should also be set according to the test result of the noise frequency band of the transformer oil tank, and since the more the number of layers of the micro-perforated film or the micro-perforated sheet 12 is, the wider the sound absorption frequency band is, under the condition that the installation space allows, the multi-layer micro-perforated film or the micro-perforated sheet 12 is preferably arranged to prevent the high-frequency noise generated by the transformer oil tank from exceeding the sound absorption frequency band range of the single-layer micro-perforated film or the micro-perforated sheet 12, thereby improving the noise reduction effect.
In this embodiment, the thickness of the micro-perforated film or the micro-perforated sheet 12 is 0.2 to 1 mm. Can satisfy the high frequency noise frequency channel scope that the sound absorption frequency channel of micro-perforated film or micro-perforated sheet 12 covers transformer tank in this thickness scope, it is concrete, adopt the micro-perforated film when thickness is 0.2 ~ 0.6mm, adopt micro-perforated sheet 12 when thickness is 0.6 ~ 1mm, occupation space is little, can reduce the whole thickness of compound acoustic baffle 1, ensures that transformer tank can satisfy the narrow and small space installation demand of compactness.
Referring to fig. 1 to 7, as a specific implementation manner of the embodiment of the present invention, the overall thickness of the sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank is less than 150 mm. The occupied space is small, the installation requirement of the transformer oil tank in a narrow space can be met, and the transformer oil tank is suitable for being installed and used in an urban power grid.
The invention also provides a transformer oil tank. Referring to fig. 1 to 10, the transformer tank includes the sound absorption and insulation structure for controlling the sound vibration of the transformer tank.
The transformer provided by the invention adopts the sound absorption and insulation structure for controlling the sound vibration of the oil tank of the transformer, the composite sound absorption plate 1 arranged at the periphery of the oil tank can absorb the noise of the middle and low frequency range, the vibration absorption sandwich plate 2 can absorb the vibration wave generated by the vibration of the wall of the oil tank so as to block the transmission of the vibration noise of the oil tank, meanwhile, the vibration absorption sandwich plate 2 is arranged at one side of the composite sound absorption plate 1, the first cavity 3 is formed between the composite sound absorption plate 1 and the vibration absorption sandwich plate 2, or the vibration absorption sandwich plates 2 are arranged at both sides of the composite sound absorption plate 1 so as to form the second cavity 4 between the two vibration absorption sandwich plates 2 and the composite sound absorption plate 1, the sound absorption effect of the first cavity 3 or the second cavity 4 is utilized, and the thickness of the first cavity 3 or the second cavity 4 is set according to the sound vibration frequency range of the wall of the oil tank, so that the sound insulation frequency range of the first cavity 3 or the second cavity 4 is matched with the sound vibration, through the cooperation damping sound absorption effect of inhaling sandwich panel 2, compound acoustic baffle 1 and first cavity 3 or second cavity 4 of shaking, can improve noise suppression performance, and simple structure, occupation space is little, can be suitable for the transformer overall arrangement in city compact space, and compare in increasing the mode that the thick vibration suppression of carrying on of fuel tank wall, can reduce the sound vibration control cost of transformer.
The invention also provides a transformer. Referring to fig. 1 to 10, the transformer includes the transformer tank.
The transformer provided by the invention adopts the transformer oil tank with the sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank, the composite sound absorption plate 1 arranged at the periphery of the oil tank can absorb the noise in the middle and low frequency range, the vibration absorption sandwich plate 2 can absorb the vibration wave generated by the vibration of the wall of the oil tank so as to obstruct the transmission of the vibration noise of the oil tank, meanwhile, the vibration absorption sandwich plate 2 is arranged at one side of the composite sound absorption plate 1, the first cavity 3 is formed between the composite sound absorption plate 1 and the vibration absorption sandwich plate 2, or the vibration absorption sandwich plates 2 are arranged at both sides of the composite sound absorption plate 1 so as to form the second cavity 4 between the two vibration absorption sandwich plates 2 and the composite sound absorption plate 1, the sound absorption effect of the first cavity 3 or the second cavity 4 is utilized, and the thickness of the first cavity 3 or the second cavity 4 is arranged according to the sound vibration frequency range of the wall of the oil tank, so that the sound insulation frequency range of the first cavity 3 or the second cavity 4 can be matched with the sound vibration, through the cooperation damping sound absorption effect of inhaling sandwich panel 2, compound acoustic baffle 1 and first cavity 3 or second cavity 4 of shaking, can improve noise suppression performance, and simple structure, occupation space is little, can be suitable for the transformer overall arrangement in city compact space, and compare in increasing the mode that the thick vibration suppression of carrying on of fuel tank wall, can reduce the sound vibration control cost of transformer.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (10)
1. The sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank is characterized by comprising a composite sound absorption plate which is used for being suspended on the outer box wall of the transformer oil tank, wherein a sound absorption sandwich plate is arranged outside at least one side plate of the composite sound absorption plate, and the sound absorption sandwich plate and the composite sound absorption plate are connected and fixed through a plurality of connecting pieces;
when the vibration absorption sandwich plate is arranged outside one side plate of the composite sound absorption plate, the vibration absorption sandwich plate and the composite sound absorption plate are arranged at intervals to form a first cavity between the vibration absorption sandwich plate and the composite sound absorption plate; when the vibration absorption sandwich plates are arranged outside the two side plate surfaces of the composite sound absorption plate, at least one vibration absorption sandwich plate and the composite sound absorption plate are arranged at intervals to form a second cavity outside at least one side plate surface of the composite sound absorption plate.
2. The sound absorbing and insulating structure for controlling the sound vibration of the transformer oil tank as claimed in claim 1, wherein when the sound absorbing sandwich panel is provided outside both side panels of the composite sound absorbing panel, both the sound absorbing sandwich panel and the composite sound absorbing panel are spaced apart to form the second cavity outside both side panels of the composite sound absorbing panel.
3. The sound absorbing and insulating structure for controlling the sound vibration of the oil tank of the transformer as claimed in claim 2, wherein the distance between the two vibration absorbing sandwich plates and the composite sound absorbing plate is different.
4. The sound absorbing and insulating structure for controlling the sound vibration of the oil tank of the transformer as claimed in claim 1, wherein the sound absorbing sandwich plate comprises two sound insulating plates arranged at intervals, and a periodic lattice structure arranged between the two sound insulating plates and respectively connected with the two sound insulating plates.
5. The sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank as claimed in claim 4, wherein the periodic lattice structure is a plurality of steel members distributed in a periodic lattice sequence, and the steel members are structural members formed by cross-connecting a plurality of steel bars into an X shape, a pyramid shape or a m shape.
6. The sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank as claimed in claim 4, wherein the thickness of the sound absorption sandwich plate is 10 to 30mm, and the thickness of the sound insulation plate is 1 to 3 mm.
7. The sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank as claimed in claim 1, wherein the composite sound absorption plate comprises at least two layers of porous sound absorption material plates which are stacked, and at least one layer of micro-perforated film or micro-perforated thin plate which is respectively sandwiched between the adjacent porous sound absorption material plates.
8. The sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank as claimed in any one of claims 1 to 7, wherein the whole thickness of the sound absorption and insulation structure for controlling the sound vibration of the transformer oil tank is less than 150 mm.
9. A transformer tank, characterized by comprising the sound absorption and insulation structure for controlling the sound vibration of the transformer tank according to any one of claims 1 to 8.
10. A transformer, comprising a transformer tank according to claim 9.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113643678A (en) * | 2021-07-06 | 2021-11-12 | 洛阳拖拉机研究所有限公司 | Sound absorption and insulation composite structure |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101404159A (en) * | 2008-10-14 | 2009-04-08 | 江苏中能电力设备有限公司 | Sound insulation module on sound insulation apparatus of large noise equipment |
| CN201944177U (en) * | 2010-12-30 | 2011-08-24 | 北京市电力公司 | Vibration isolation base and transformer provided with same |
| US20150144421A1 (en) * | 2013-11-26 | 2015-05-28 | Faist Chemtec Gmbh | Sound Absorbing Sandwich Plate |
| CN105803965A (en) * | 2016-04-28 | 2016-07-27 | 中国铁道科学研究院 | Wideband sound absorption unit plate |
| CN110211559A (en) * | 2019-06-20 | 2019-09-06 | 西安交通大学 | A kind of pyramid lattice scattering body is mingled with type underwater sound absorption structure |
| EP3556955A1 (en) * | 2018-04-18 | 2019-10-23 | Saint-Gobain Placo | Wall with dynamic absorber |
| CN110459393A (en) * | 2019-08-02 | 2019-11-15 | 全球能源互联网研究院有限公司 | A kind of sound absorption composite members and a kind of transformer |
| CN110580894A (en) * | 2019-09-24 | 2019-12-17 | 哈尔滨工程大学 | Sound baffle composite structure for underwater detection equipment |
| CN110676035A (en) * | 2019-10-24 | 2020-01-10 | 绍兴建元电力集团有限公司大兴电力承装分公司 | Transformer oil tank inner wall constrained damping composite sound insulation structure and design method |
| CN111058391A (en) * | 2019-12-06 | 2020-04-24 | 华东交通大学 | Novel sound barrier containing resonant cantilever beam |
| CN212129524U (en) * | 2020-01-18 | 2020-12-11 | 李鹏 | Sound insulation and noise reduction device of air conditioner room |
-
2021
- 2021-03-23 CN CN202110309323.9A patent/CN113066463B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101404159A (en) * | 2008-10-14 | 2009-04-08 | 江苏中能电力设备有限公司 | Sound insulation module on sound insulation apparatus of large noise equipment |
| CN201944177U (en) * | 2010-12-30 | 2011-08-24 | 北京市电力公司 | Vibration isolation base and transformer provided with same |
| US20150144421A1 (en) * | 2013-11-26 | 2015-05-28 | Faist Chemtec Gmbh | Sound Absorbing Sandwich Plate |
| CN105803965A (en) * | 2016-04-28 | 2016-07-27 | 中国铁道科学研究院 | Wideband sound absorption unit plate |
| EP3556955A1 (en) * | 2018-04-18 | 2019-10-23 | Saint-Gobain Placo | Wall with dynamic absorber |
| CN110211559A (en) * | 2019-06-20 | 2019-09-06 | 西安交通大学 | A kind of pyramid lattice scattering body is mingled with type underwater sound absorption structure |
| CN110459393A (en) * | 2019-08-02 | 2019-11-15 | 全球能源互联网研究院有限公司 | A kind of sound absorption composite members and a kind of transformer |
| CN110580894A (en) * | 2019-09-24 | 2019-12-17 | 哈尔滨工程大学 | Sound baffle composite structure for underwater detection equipment |
| CN110676035A (en) * | 2019-10-24 | 2020-01-10 | 绍兴建元电力集团有限公司大兴电力承装分公司 | Transformer oil tank inner wall constrained damping composite sound insulation structure and design method |
| CN111058391A (en) * | 2019-12-06 | 2020-04-24 | 华东交通大学 | Novel sound barrier containing resonant cantilever beam |
| CN212129524U (en) * | 2020-01-18 | 2020-12-11 | 李鹏 | Sound insulation and noise reduction device of air conditioner room |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113643678A (en) * | 2021-07-06 | 2021-11-12 | 洛阳拖拉机研究所有限公司 | Sound absorption and insulation composite structure |
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|---|---|
| CN113066463B (en) | 2022-08-02 |
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