CN201576561U - Low-noise electrical capacitor - Google Patents
Low-noise electrical capacitor Download PDFInfo
- Publication number
- CN201576561U CN201576561U CN2009202455330U CN200920245533U CN201576561U CN 201576561 U CN201576561 U CN 201576561U CN 2009202455330 U CN2009202455330 U CN 2009202455330U CN 200920245533 U CN200920245533 U CN 200920245533U CN 201576561 U CN201576561 U CN 201576561U
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- Prior art keywords
- microperforated panel
- power capacitor
- low noise
- noise power
- sound
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Abstract
The utility model discloses a low-noise electrical capacitor relating to field of an electrical capacitor. The low-noise electrical capacitor comprises a shell, a core column arranged in the shell and a sound absorption device, is characterized in that: the sound absorption device comprises a bottom separating plate, a side separating plate, a micro-perforated plate and convex edges arranged on the micro-perforated plate; the bottom separating plate, the side separating plate and the micro-perforated plate form a sound absorption cavity.
Description
Technical field
The utility model relates to the power capacitor field, particularly a kind of low noise power capacitor.
Background technology
The noise of single capacitor individuality is less, and is therefore less to the noise problem research of the power capacitor in the high voltage power transmission.But along with the development of high voltage long distance power transmission, particularly in the high voltage direct current transmission project, a large amount of electrification capacitors carries out reactive power compensation (can reach several thousand operations simultaneously), and the power capacitor noise problem displays gradually.At present, the reduction noise scheme of power capacitor is at the outside screening arrangement that increases of power capacitor, is used to absorb noise.This mode is brought two problems: 1) the maintenance complexity is installed; 2) capacitor heat radiation difficulty in service causes the capacitor failure rate to increase.
Summary of the invention
The purpose of this utility model is to provide a kind of low noise power capacitor, can reduce noise under the prerequisite that guarantees the power capacitor safe operation, and convenient the installation is overhauled.
In order to achieve the above object, the utility model is achieved by the following technical solutions.
A kind of low noise power capacitor comprises housing, is arranged on the stem stem in the housing, and sound arrester, it is characterized in that described sound arrester comprises base spacer, side dividing plate, microperforated panel and is arranged on fin on the microperforated panel, base spacer, side dividing plate and microperforated panel surround the sound-absorbing cavity.
Further improvement of the utility model and characteristics are:
Aperture on the described microperforated panel is 0.01～1mm;
The punching rate of described microperforated panel is controlled between 0.01%～0.1%;
Described microperforated panel adopts the SMC composite material to make;
The bottom and/or the top of described stem stem are provided with sound arrester.
The utility model is provided with sound arrester at the bottom and/or the top of the stem stem of power capacitor, sound arrester constitutes the sound-absorbing cavity by base spacer, side dividing plate and microperforated panel, the sound-absorbing cavity can absorb the noise that stem stem produces, reduced the noise of power capacitor, and do not influence the heat radiation of power capacitor, and maintenance is convenient.In the high voltage direct current transmission project, when a large amount of power capacitor groups were moved simultaneously, the noise of power capacitor group obviously reduced.
Description of drawings
Fig. 1 is the structural representation of sound arrester;
Fig. 2 cuts open schematic diagram for the A-A of Fig. 1;
Fig. 3 is a kind of structural representation with low noise power capacitor of sound arrester.
Embodiment
With reference to Fig. 1,2, sound arrester is made up of four parts, i.e. microperforated panel 1, base spacer 2, side dividing plate 3 and be arranged on fin 4 on the microperforated panel 1.Microperforated panel 1, base spacer 2, side dividing plate 3 threes constitute sound-absorbing cavity 5, and fin 4 is used to limit the distance of microperforated panel 1 and capacity cell, are beneficial to microperforated panel 1 and better absorb the noise that capacity cell produces.Microperforated panel 1 adopts the SMC composite material, has good compatibility with capacitor oil C101, is placed in capacitor inside and can pollute capacitor body.Aperture on the microperforated panel 1 is below 1mm, and punching rate is controlled between 0.01%～0.1%, has not only guaranteed the good sound absorption effect, and is convenient to processing.Base spacer adopts electrician's cardboard to make.The height of regulating sound-absorbing cavity 5 can change the resonance frequency of sound arrester, with the absorption of the main noise frequency that adapts to capacitor.
With reference to Fig. 3, the low noise power capacitor with sound arrester of present embodiment is a rectangular structure, and sleeve pipe 9 lead-out wires are arranged on the top, and shell 8 is made for corrosion resistant plate, and inside is press-fited by a plurality of rectangle capacity cells 7 forms stem stem.In the shell 8 of power capacitor, the top and the bottom that are positioned at stem stem add sound arrester 6 respectively.
Claims (5)
1. low noise power capacitor, comprise housing, be arranged on the stem stem in the housing, and sound arrester, it is characterized in that, described sound arrester comprises base spacer, side dividing plate, microperforated panel and is arranged on fin on the microperforated panel, and base spacer, side dividing plate and microperforated panel surround the sound-absorbing cavity.
2. a kind of low noise power capacitor according to claim 1 is characterized in that the aperture on the described microperforated panel is 0.01～1mm.
3. a kind of low noise power capacitor according to claim 1 is characterized in that the punching rate of described microperforated panel is controlled between 0.01%～0.1%.
4. a kind of low noise power capacitor according to claim 1 is characterized in that, described microperforated panel adopts the SMC composite material to make.
5. a kind of low noise power capacitor according to claim 1 is characterized in that the bottom and/or the top of described stem stem are provided with sound arrester.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202455330U CN201576561U (en) | 2009-12-01 | 2009-12-01 | Low-noise electrical capacitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009202455330U CN201576561U (en) | 2009-12-01 | 2009-12-01 | Low-noise electrical capacitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201576561U true CN201576561U (en) | 2010-09-08 |
Family
ID=42696436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009202455330U Expired - Lifetime CN201576561U (en) | 2009-12-01 | 2009-12-01 | Low-noise electrical capacitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201576561U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102315016A (en) * | 2011-07-08 | 2012-01-11 | 日新电机（无锡）有限公司 | Power capacitor possessing noise shield device |
| CN102480129A (en) * | 2010-11-30 | 2012-05-30 | 无锡赛晶电力电容器有限公司 | High voltage power capacitor |
| CN105405652A (en) * | 2015-12-15 | 2016-03-16 | 上海思源电力电容器有限公司 | Low-noise power capacitor |
| CN105719832A (en) * | 2016-04-26 | 2016-06-29 | 桂林电力电容器有限责任公司 | Power capacitor unit |
| US9396875B2 (en) | 2013-06-14 | 2016-07-19 | Abb Technology Ltd | Terminal bushing sealing element |
-
2009
- 2009-12-01 CN CN2009202455330U patent/CN201576561U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102480129A (en) * | 2010-11-30 | 2012-05-30 | 无锡赛晶电力电容器有限公司 | High voltage power capacitor |
| CN102315016A (en) * | 2011-07-08 | 2012-01-11 | 日新电机（无锡）有限公司 | Power capacitor possessing noise shield device |
| CN102315016B (en) * | 2011-07-08 | 2013-02-27 | 日新电机（无锡）有限公司 | Power capacitor possessing noise shield device |
| US9396875B2 (en) | 2013-06-14 | 2016-07-19 | Abb Technology Ltd | Terminal bushing sealing element |
| CN105405652A (en) * | 2015-12-15 | 2016-03-16 | 上海思源电力电容器有限公司 | Low-noise power capacitor |
| CN105719832A (en) * | 2016-04-26 | 2016-06-29 | 桂林电力电容器有限责任公司 | Power capacitor unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Xi'an Xidian power capacitor Co., Ltd. Assignor: China XD Electronic Corporation Contract record no.: 2012610000079 Denomination of utility model: Low-noise electrical capacitor Granted publication date: 20100908 License type: Exclusive License Record date: 20120530 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20100908 |
|
| CX01 | Expiry of patent term |