CN203858967U - Low-noise dry type transformer - Google Patents
Low-noise dry type transformer Download PDFInfo
- Publication number
- CN203858967U CN203858967U CN201420220669.7U CN201420220669U CN203858967U CN 203858967 U CN203858967 U CN 203858967U CN 201420220669 U CN201420220669 U CN 201420220669U CN 203858967 U CN203858967 U CN 203858967U
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- iron core
- case shell
- type transformer
- noise
- sound absorbing
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Abstract
The utility model discloses a low-noise dry type transformer. The low-noise dry type transformer comprises a body. The body comprises a box shell, an iron core, a primary winding and a secondary winding. The primary winding and the secondary winding are wound around the iron core respectively. The iron core, the primary winding and the secondary winding are all arranged inside the box shell. A noise reduction part is connected to the box shell. The noise reduction part comprises a plurality of sound absorbing layers and reflecting layers, wherein the sound absorbing layers and the reflecting layers are stacked and combined in sequence. Each sound absorbing layer comprises a porous substrate, wherein a plurality of protruding blocks are arranged on the porous substrate. Each reflecting layer comprises a smooth substrate, wherein adhesive is arranged between the porous substrates and the smooth substrates. The low-noise dry type transformer can well reduce noise.
Description
Technical field
The utility model relates to a kind of electric equipment, and in particular, it relates to a kind of low noise dry-type transformer.
Background technology
Dry-type transformer is to utilize the principle of electromagnetic induction to change the device of alternating voltage, dry-type transformer is commonly used for the aspects such as lifting voltage, matched impedance and safety isolation, its primary clustering comprises primary coil, secondary coil and the iron core being all arranged in case shell, and the equal winding of primary coil and secondary coil is on iron core; Primary coil is connected with AC power, by the principle of electromagnetic induction, can induce secondary voltage at secondary coil; But iron core is stacked and is formed by silicon steel sheet, iron core can produce magneto-striction phenomenon under the effect of alternating magnetic field, magnetostriction be exactly silicon steel sheet along with the variation in magnetic field, can there is small variation in its size, thereby cause the vibration of iron core, the vibration of iron core can produce noise; In recent years, in residential quarter and public place more and more used dry-type transformer, the noise problem of dry-type transformer has been subject to increasing people's care, so how to reduce noise of dry type transformer, has been urgent problem; The method that current dry-type transformer reduces noise is to use annealing to cover the high-quality silicon steel sheet of paint, and reduce the quality of iron core, thereby reduce magneto-striction phenomenon and reduce the effect of making an uproar, but the magnitude of magnetostriction that this method reduces is very limited, cause iron core still can send larger vibration when work, cannot reach the effect of good reduction noise, so there is certain room for improvement.
Utility model content
The deficiency existing for prior art, the purpose of this utility model is to provide a kind of low noise dry-type transformer that can reduce preferably noise.
For achieving the above object, the utility model provides following technical scheme: a kind of low noise dry-type transformer, comprise body, described body comprises case shell, iron core, primary coil and secondary coil, the equal winding of described primary coil and secondary coil is on iron core, described iron core, primary coil and secondary coil are all arranged in case shell, on described case shell, be connected with noise abatement portion, described noise abatement portion comprises some superimposed sound absorbing layer and reflector successively, described sound absorbing layer comprises porous matrix, on described porous matrix, be provided with some projection pieces, described reflector comprises smooth matrix, between described porous matrix and smooth matrix, be provided with binder.
By adopting technique scheme, porous matrix is provided with many tiny unlimited through holes from surface to inside, so can absorb sound wave, and porous material can absorbing high-frequency sound wave, and the noise producing during the core vibration of dry-type transformer is exactly high frequency sound wave, so just in time can absorb the noise that dry-type transformer produces, and projection piece can make the rough surface of porous material, thereby improve the ability that absorbs noise; The surface of smooth matrix is very smooth, so have high acoustic reflection rate, the sound wave that biography can be come reflects; Smooth matrix and porous matrix are bonded together by binder; When iron core magnetostriction makes a noise, sound wave is when the sound absorbing layer, and first's sound wave is absorbed by sound absorbing layer, and second portion sound wave is reflected layer and is reflected back in sound absorbing layer, and third part sound wave penetrate through reflective layer enters the sound absorbing layer of lower one deck; In second portion sound wave, some is reflected back toward in case shell, and another part is absorbed by sound absorbing layer again; A part in third part sound wave is absorbed by the sound absorbing layer of lower one deck, and another part returned in case shell by the reflective layer reflects of lower one deck, and again passes through sound absorbing layer, thereby forms acoustic reflection absorption system, has greatly improved the effect that reduces noise; This design can reduce noise preferably.
The utility model is further set to: described iron core surface coverage has epoxy resin, between described iron core and case shell, is provided with vibration damping rubber cushion.
By adopting technique scheme, at iron core surface coverage epoxy resin, silicon steel sheet can be fixed up, the tension force on constraint iron core surface, thus reduce magnitude of magnetostriction, thus noise reduced; Vibration damping rubber cushion can absorb the vibration of iron core, thereby prevents that the vibration of iron core is delivered on case shell; This design can further reduce the vibration that iron core produces, thereby reduces noise.
The utility model is further set to: in described case shell, be fixed with wave absorption post, described wave absorption post is made by super glass wool.
By adopting technique scheme, super glass wool is a kind of porous material, can effectively absorb sound wave, so wave absorption post can absorb sound wave; The sound wave that iron core produces has quite a few by emitting layer, to be reflected back in case shell, so can be subject to the impact of multiple sound wave in case shell, the sound wave that wave absorption post impacts in can respiratory box shell; This design can be absorbed in the sound wave transmitting in case shell.
The utility model is further set to: on described case shell, be provided with damping base, described damping base comprises spring and rubber blanket, and described spring one end is connected on case shell and the other end is connected with rubber blanket.
By adopting technique scheme, iron core, when vibration, can pass to case shell by part vibration, and case shell is placed on the ground, thus the constantly vibration of case shell, and vibration damping holder is fixed between case shell and ground, and rubber blanket pad on the ground, when case shell vibrates, spring can absorb vibration; This design can reduce the vibration of case shell.
The utility model is further set to: described porous matrix is made by blanket of glass wool, and described smooth matrix is made by nickel plating steel disc.
By adopting technique scheme, blanket of glass wool is the good porous material of a kind of sound absorption qualities, so can absorb sound wave; Smooth matrix is made by nickel plating steel disc, and nickel plating on steel disc can increase the fineness on steel disc surface, improves the acoustic reflection ability of steel disc, thereby acoustic reflection is gone back, and make porous matrix can repeat sound wave to absorb; This design can make porous matrix absorb sound wave, makes smooth matrix reflective sound wave.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present utility model;
Fig. 2 is noise abatement of the present utility model portion cutaway view.
In figure: 1, case shell; 2, iron core; 3, primary coil; 4, secondary coil; 5, noise abatement portion; 6, sound absorbing layer; 7, reflector; 8, porous matrix; 9, projection piece; 10, smooth matrix; 11, binder; 12, vibration damping rubber cushion; 13, wave absorption post; 14, damping base; 15, spring; 16, rubber blanket.
Embodiment
Shown in Fig. 2, a kind of low noise dry-type transformer that present case is implemented, comprise body, described body comprises case shell 1, iron core 2, primary coil 3 and secondary coil 4, described primary coil 3 and the equal winding of secondary coil 4 are on iron core 2, described iron core 2, primary coil 3 and secondary coil 4 are all arranged in case shell 1, described iron core 2 surface coverage have epoxy resin, between described iron core 2 and case shell 1, be provided with vibration damping rubber cushion 12, on described case shell 1, be connected with noise abatement portion 5, described noise abatement portion 5 comprises some superimposed sound absorbing layers 6 and reflector 7 successively, described sound absorbing layer 6 comprises porous matrix 8, on described porous matrix 8, be provided with some projection pieces 9, described reflector 7 comprises smooth matrix 10, described porous matrix 8 is made by blanket of glass wool, described smooth matrix 10 is made by nickel plating steel disc, between described porous matrix 8 and smooth matrix 10, be provided with binder 11, in described case shell 1, be fixed with wave absorption post 13, described wave absorption post 13 is made by super glass wool, on described case shell 1, be provided with damping base 14, described damping base 14 comprises spring 15 and rubber blanket 16, described spring 15 one end are connected on case shell 1 and the other end is connected with rubber blanket 16.
Iron core 2 surface coverage epoxy resin can be fixed up silicon steel sheet, the tension force on constraint iron core 2 surfaces, thus reduce magnitude of magnetostriction, thus the vibration of iron core 2 reduced; Vibration damping rubber cushion 12 can, when iron core 2 magnetostriction, absorb a part of vibration; Porous matrix 8 is supported by blanket of glass wool, so be provided with many tiny unlimited through holes from surface to inner, can absorb sound wave, and projection piece 9 can make the rough surface of porous material, thereby improves the ability that absorbs noise; Smooth matrix 10 is made by nickel-clad steel plate, and its surface is very smooth, so have high acoustic reflection rate, the sound wave that biography can be come reflects; Smooth matrix 10 is bonded together by binder 11 with porous matrix 8, and superimposed successively; Wave absorption post 13 adopts super glass wool to make, and has the function of fabulous absorption sound wave; And iron core 2, when vibration, part vibration can be passed to case shell 1, and case shell 1 is placed on the ground, so case shell 1 is vibration constantly, and vibration damping holder is fixed between case shell 1 and ground, and rubber blanket 16 pads on the ground, when 1 vibration of case shell, spring 15 can absorb vibration.
When iron core 2 magnetostriction make a noise, first by wave absorption post 13, absorbed a part of sound wave, remaining sound wave is again by noise abatement portion 5, and when by noise abatement portion 5, first's sound wave is absorbed by sound absorbing layer 6, second portion sound wave is reflected layer and 7 is reflected back in sound absorbing layer 6, and third part sound wave penetrate through reflective layer 7 enters the sound absorbing layer 6 of lower one deck; Wherein, in second portion sound wave, have greatly and be reflected back toward in case shell 1, again by wave absorption post 13, absorbed, and another part is absorbed by sound absorbing layer 6 again; A part in third part sound wave is absorbed by the sound absorbing layer 6 of lower one deck, and another part is reflected back in case shell 1 by the reflector 7 of lower one deck, and again passes through sound absorbing layer 6, thereby makes sound wave form the circulation of reflection-absorption.
The utlity model has following advantage: can reduce preferably noise.
The above is only preferred implementation of the present utility model, and protection range of the present utility model is also not only confined to above-described embodiment, and all technical schemes belonging under the utility model thinking all belong to protection range of the present utility model.It should be pointed out that for those skilled in the art, in the some improvements and modifications that do not depart under the utility model principle prerequisite, these improvements and modifications also should be considered as protection range of the present utility model.
Claims (5)
1. a low noise dry-type transformer, comprise body, described body comprises case shell, iron core, primary coil and secondary coil, the equal winding of described primary coil and secondary coil is on iron core, described iron core, primary coil and secondary coil are all arranged in case shell, it is characterized in that: on described case shell, be connected with noise abatement portion, described noise abatement portion comprises some superimposed sound absorbing layer and reflector successively, described sound absorbing layer comprises porous matrix, on described porous matrix, be provided with some projection pieces, described reflector comprises smooth matrix, between described porous matrix and smooth matrix, be provided with binder.
2. a kind of low noise dry-type transformer according to claim 1, is characterized in that: described iron core surface coverage has epoxy resin, between described iron core and case shell, is provided with vibration damping rubber cushion.
3. a kind of low noise dry-type transformer according to claim 2, is characterized in that: in described case shell, be fixed with wave absorption post, described wave absorption post is made by super glass wool.
4. a kind of low noise dry-type transformer according to claim 3, is characterized in that: on described case shell, be provided with damping base, described damping base comprises spring and rubber blanket, and described spring one end is connected on case shell and the other end is connected with rubber blanket.
5. a kind of low noise dry-type transformer according to claim 4, is characterized in that: described porous matrix is made by blanket of glass wool, and described smooth matrix is made by nickel plating steel disc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420220669.7U CN203858967U (en) | 2014-04-30 | 2014-04-30 | Low-noise dry type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420220669.7U CN203858967U (en) | 2014-04-30 | 2014-04-30 | Low-noise dry type transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203858967U true CN203858967U (en) | 2014-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420220669.7U Expired - Fee Related CN203858967U (en) | 2014-04-30 | 2014-04-30 | Low-noise dry type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203858967U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047360A (en) * | 2015-08-07 | 2015-11-11 | 常熟市常源变压器有限公司 | Low-noise dry-type transformer |
| CN105551716A (en) * | 2016-02-24 | 2016-05-04 | 李聪 | Low noise inductor |
| CN108389683A (en) * | 2017-12-26 | 2018-08-10 | 铜陵日科电子有限责任公司 | A kind of sound-absorbing transformer case |
| CN111341526A (en) * | 2020-03-17 | 2020-06-26 | 广东电网有限责任公司电力科学研究院 | Vibration isolation system of oil-immersed transformer |
-
2014
- 2014-04-30 CN CN201420220669.7U patent/CN203858967U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105047360A (en) * | 2015-08-07 | 2015-11-11 | 常熟市常源变压器有限公司 | Low-noise dry-type transformer |
| CN105551716A (en) * | 2016-02-24 | 2016-05-04 | 李聪 | Low noise inductor |
| CN108389683A (en) * | 2017-12-26 | 2018-08-10 | 铜陵日科电子有限责任公司 | A kind of sound-absorbing transformer case |
| CN111341526A (en) * | 2020-03-17 | 2020-06-26 | 广东电网有限责任公司电力科学研究院 | Vibration isolation system of oil-immersed transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141001 Termination date: 20210430 |