CN101794660A - Preparation method of shielding shell of low frequency transformer - Google Patents
Preparation method of shielding shell of low frequency transformer Download PDFInfo
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- CN101794660A CN101794660A CN200910232432A CN200910232432A CN101794660A CN 101794660 A CN101794660 A CN 101794660A CN 200910232432 A CN200910232432 A CN 200910232432A CN 200910232432 A CN200910232432 A CN 200910232432A CN 101794660 A CN101794660 A CN 101794660A
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- frequency transformer
- low frequency
- ferrite
- preparation
- shielding shell
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- Shielding Devices Or Components To Electric Or Magnetic Fields (AREA)
Abstract
The invention provides a preparation method of a shielding shell of a low frequency transformer. The method for preparing the shielding shell of the low frequency transformer is as follows: a shielding casing is arranged outside the transformer, the main component of the casing is ferrite, rare earth cobalt-boron alloy is electroplated on the inner and outer surfaces of ferrite, and finally passivant is used for heat treatment to passivate the rare earth alloy surface and prevent rustiness. The significant effect of the invention is to install the shielding protective casing on the low frequency transformer so as to save the cost; and ferrite can be used to prepare the skeleton of the casing; and a rare earth cobalt-boron alloy layer is electroplated on the inner and outer surfaces of the casing so as to greatly increase the magnetism of ferrite and save the cost.
Description
Technical field
The present invention relates to a kind of preparation method of shielding shell, especially a kind of preparation method of shielding shell of low-frequency transformer.
Background technology
Along with the fast development of technology such as electronics, communication, electromagnetic radiation has become a kind of new pollutant sources, and the World Health Organization classifies electromagnetic radiation pollution as third place in the world big public hazards.A series of problems such as the electromagnetic radiation pollution meeting causes that electromagnetic interference, electromagnetic environment pollution and electromagnetic information are divulged a secret.The research major part in past concentrates on the radiation hazradial bundle of electric field.Find that by a large amount of investigation the harm of low frequency magnetic field is particularly serious now.On the one hand, the magnetic interference of low frequency magnetic field generation is the key factor that influences other electronic electric equipment operate as normal.Near the image of the computer for example, the low frequency magnetic field that engine produced can make and reading and communication equipment produce distortion.On the other hand, low frequency magnetic field can make central nervous system disorder, the cardiovascular system imbalance of human body, and increases the incidence of disease of leukaemia, brain tumor, breast cancer.Therefore, low frequency magnetic field can seriously jeopardize national politics, military affairs and social safety, and the radiation of low frequency magnetic field is employed prevention and control measures seems very necessary.
The method that reduces the low frequency magnetic field radiation has a lot, and except that reasonable line arrangement structurally, rationally settle the component, it also is a kind of effective ways that the employing magnetic shielding material carries out magnetic screen.For example, set up magnetic shield room, electric power, electronic equipment casing are carried out magnetic screen, holding wire and power line are shielded, reach the purpose that prevents that external magnetic field from disturbing equipment, device with magnetic shielding material with magnetic shielding material.Therefore, from the material angle, research and develop particularly necessity of new low-frequency electromagnetic wave magnetic shielding material.Traditional low frequency magnetic shielding material adopts homogenous materials such as sheet metal, thin slice, strip more, makes the low frequency magnetic shielding material as iron commonly used, silicon steel sheet, stainless steel, permalloy etc.Material often is machined into thin plate, thin slice or strip, and this not only can reduce the magnetic shield performance of material, and makes energy consumption increase, cost up, cost performance reduce, use inconvenient.
Summary of the invention
At the problems referred to above, the invention provides a kind of preparation method of shielding shell of low-frequency transformer.
A kind of preparation method of shielding shell of low-frequency transformer, it is characterized in that outside transformer, also being provided with a screening can, the main component of shell itself is a ferrite, again the terres rares cobalt-boron alloy is electroplated at ferritic surfaces externally and internally, last heat treatment is used passivator to carry out passivation on the rare earth alloy surface and is prevented corrosion, makes a kind of method of shield shell of low-frequency transformer.
Remarkable result of the present invention is to be provided with the shielding protection shell on low-frequency transformer; in order to save cost, can adopt ferrite to make the shell skeleton, plate Rare-Earth Cobalt boron alloy layer and power at its shell surfaces externally and internally; can increase ferritic magnetic greatly, and save cost.
Embodiment
Below the present invention will be further described: outside transformer, also be provided with a screening can, the main component of shell itself is a ferrite, again the terres rares cobalt-boron alloy is electroplated at ferritic surfaces externally and internally, last heat treatment is used passivator to carry out passivation on the rare earth alloy surface and is prevented corrosion, and the thickness of plating alloy can be adjusted according to needs.
Apply the present invention in the shielding protection of low-frequency transformer; in order to save cost, can adopt ferrite to make the shell skeleton, plate Rare-Earth Cobalt boron alloy layer and power at its shell surfaces externally and internally; can increase ferritic magnetic greatly, and save about 30% cost.
Claims (3)
1. the preparation method of shielding shell of a low-frequency transformer, it is characterized in that outside transformer, also being provided with a screening can, the main component of shell itself is a ferrite, again the terres rares cobalt-boron alloy is electroplated at ferritic surfaces externally and internally, last heat treatment is used passivator to carry out passivation on the rare earth alloy surface and is prevented corrosion, makes a kind of method of shield shell of low-frequency transformer.
2. the preparation method of shielding shell of low-frequency transformer as claimed in claim 1 is characterized in that the screening can main component is a ferrite.
3. the preparation method of shielding shell of low-frequency transformer as claimed in claim 1 is characterized in that the plating of terres rares cobalt-boron alloy at ferritic surfaces externally and internally, and last heat treatment is used passivator to carry out passivation on the rare earth alloy surface and prevented corrosion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910232432A CN101794660A (en) | 2009-11-27 | 2009-11-27 | Preparation method of shielding shell of low frequency transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910232432A CN101794660A (en) | 2009-11-27 | 2009-11-27 | Preparation method of shielding shell of low frequency transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101794660A true CN101794660A (en) | 2010-08-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910232432A Pending CN101794660A (en) | 2009-11-27 | 2009-11-27 | Preparation method of shielding shell of low frequency transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101794660A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105632686A (en) * | 2014-11-05 | 2016-06-01 | 武陟县电业总公司 | Fabrication method for shielding shell of transformer |
-
2009
- 2009-11-27 CN CN200910232432A patent/CN101794660A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105632686A (en) * | 2014-11-05 | 2016-06-01 | 武陟县电业总公司 | Fabrication method for shielding shell of transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20100804 |