CN101752079A - Insulating treatment method for surface of induction coil - Google Patents
Insulating treatment method for surface of induction coil Download PDFInfo
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- CN101752079A CN101752079A CN201010034508A CN201010034508A CN101752079A CN 101752079 A CN101752079 A CN 101752079A CN 201010034508 A CN201010034508 A CN 201010034508A CN 201010034508 A CN201010034508 A CN 201010034508A CN 101752079 A CN101752079 A CN 101752079A
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- induction coil
- insulating barrier
- insulating
- surface insulation
- treatment method
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Abstract
The invention discloses an insulating treatment method for the surface of an induction coil, which comprises the following steps: acid-washing and passivating the external surface of the wound induction coil, and then arranging an insulating layer on the external surface of the induction coil. A layer of compact glaze is formed on all the external surfaces of the induction coil, so that the insulating purpose is achieved through the insulating property and high temperature resistance of the glaze layer and good adhesiveness of the glaze layer adhered to the external surface of the induction coil.
Description
Technical field
The invention relates to the method that a kind of induction coil surface insulation is handled, particularly a kind of method that is applicable to the induction coil surface insulation processing of using under the high temperature, the method that the induction coil surface insulation that especially being applicable to grows under carborundum, aluminum nitride crystal high temperature uses is handled.
Background technology
Conventional at present induction coil surface insulation processing method generally is at induction coil outer surface brushing insulating varnish, twines wrapping with insulating tape and/or glass wool cloth.Through handling like this, induction coil outer surface insulating properties is fine, also can normally use under vacuum state, has solved the induction coil problem of " beating arc ".But, the insulating varnish heatproof that wherein plays reliable insulating effect not high (generally being lower than 300 ℃), for the environment for use of higher temperature, this insulating treatment method is just reliable inadequately.
Summary of the invention
The present invention is directed to the defective that conventional induction coil surface insulation processing method exists, proposed the method that a kind of Medium frequency induction coil (frequency 1000-10000Hz) surface insulation that is suitable for using under the high temperature (greater than 300 ℃) is handled.Especially be applicable to the method for the Medium frequency induction coil surface insulation processing that growth is used under carborundum, aluminum nitride crystal high temperature.
The present invention is achieved in that the induction coil outer surface that coiling is shaped carries out pickling, passivation earlier, evenly forms the temperature-resistant insulation layer of one deck densification then at the induction coil all outer surfaces.The material of this insulating barrier is an enamel, and its volume resistivity is greater than 106 ohmcms; The formation method of insulating barrier can with dip, spray, coating and/or sintering; The thickness of insulating barrier is 0.01mm～2mm, preferred 0.1～1mm; Utilize glaze layer insulating properties itself and heat-resisting quantity to reach purpose of the present invention.In addition because the material similar performance of induction coil and insulating barrier, make that insulating barrier can be good attached on the induction coil.
Its Applicable temperature upper limit can be brought up to 700 ℃ through the induction coil that such surface insulation is handled, make it be applicable to that growth is used under carborundum, aluminum nitride crystal high temperature.Logical 1000-10000Hz on the process induction coil of this method insulation processing, the 1-100A alternating current is 10
-5-10
6In Pa argon gas, helium and/or the nitrogen environment, work is more than 10000 hours, do not see the discharge of insulating barrier cracking and induction coil, the phenomenon of promptly " beating arc ".
Description of drawings
Fig. 1 is an induction coil surface insulation coating schematic cross-section;
Mark among the figure: 1. coil surface insulating barrier; 2. cooling water; 3. induction coil.
Embodiment
Embodiment one:
The induction coil outer surface that coiling is shaped carries out pickling, passivation earlier, acid pickling step adopts watery hydrochloric acid (agent of pickling common chemical), evenly spray the thick ceramic glaze of last layer 0.01mm at the induction coil all outer surfaces then, can form fine and close temperature-resistant insulation layer at the induction coil outer surface after the cooling.Obtain structure as shown in Figure 1 after treatment, logical 1000Hz on induction coil, 100 amperes of alternating currents, 10
-5In the Pa ar gas environment, worked 10000 hours, do not see insulating barrier cracking and induction coil electric discharge phenomena.
Embodiment two:
The induction coil outer surface that coiling is shaped carries out pickling, passivation earlier, then induction coil is immersed in the ceramic glaze melt of fusion, soon proposes, and makes the induction coil outer surface dip the thick ceramic glaze of last layer 1mm.Can form fine and close temperature-resistant insulation layer at the induction coil outer surface after the cooling.Logical 10000Hz on induction coil, 10 amperes of alternating currents, 10
6In the Pa nitrogen environment, worked 40000 hours, do not see insulating barrier cracking and induction coil electric discharge phenomena.
Embodiment three:
The induction coil outer surface that coiling is shaped carries out pickling, passivation earlier, evenly applies one deck enamel powdered frit at the induction coil all outer surfaces, sends into then and sinters vitreous enamel in the high temperature furnace into.With the induction coil reversing, be coated with dusting, sintering process more than the repetition, can form the thick dense refractory insulating barrier of 2mm at the induction coil outer surface after 2-4 time.Logical 5000Hz on induction coil, 20 amperes of alternating currents, 10
3In the Pa helium environment, worked 30000 hours, do not see insulating barrier cracking and induction coil electric discharge phenomena.
Embodiment four:
The induction coil outer surface that coiling is shaped carries out pickling, passivation earlier, evenly sprays the thick ceramic glaze of last layer 0.3mm at the induction coil all outer surfaces then, can form fine and close temperature-resistant insulation layer at the induction coil outer surface after the cooling.Logical 3000Hz on induction coil, 30 amperes of alternating currents, 10
4In the Pa ar gas environment, worked 20000 hours, do not see insulating barrier cracking and induction coil electric discharge phenomena.
Just the present invention is described in detail to be noted that above-mentioned embodiment, and it should not be a limitation of the present invention.For the person skilled in the art, when aim that does not depart from claim and scope, the variation of various ways and details can be arranged.
Claims (6)
1. the method handled of an induction coil surface insulation, concrete steps are: the induction coil outer surface that coiling is shaped carries out pickling, passivation earlier, at the induction coil outer surface insulating barrier is set then, and the insulating barrier material is an enamel.
2. according to the method for the described induction coil surface insulation processing of claim 1, it is characterized in that: described enamel volume resistivity is greater than 10
6Ohmcm.
3. the method for handling according to the described induction coil surface insulation of claim 1 is characterized in that: the method to set up of described insulating barrier for dip, spray, coating and/or sintering.
4. according to the method for the described induction coil surface insulation processing of claim 1, it is characterized in that: the thickness of described insulating barrier is 0.01mm～2mm.
5. according to the method for the described induction coil surface insulation processing of claim 1, it is characterized in that: the thickness of described insulating barrier is 0.1mm～1mm.
6. according to the method for the described induction coil surface insulation processing of claim 1, it is characterized in that: the material of described induction coil is a copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010034508A CN101752079A (en) | 2010-01-20 | 2010-01-20 | Insulating treatment method for surface of induction coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010034508A CN101752079A (en) | 2010-01-20 | 2010-01-20 | Insulating treatment method for surface of induction coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101752079A true CN101752079A (en) | 2010-06-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010034508A Pending CN101752079A (en) | 2010-01-20 | 2010-01-20 | Insulating treatment method for surface of induction coil |
Country Status (1)
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| CN (1) | CN101752079A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106455176A (en) * | 2016-07-12 | 2017-02-22 | 西安博大电炉有限公司 | Inductor, induction coil used for inductor and manufacturing method of induction coil |
| CN108580097A (en) * | 2017-05-25 | 2018-09-28 | 东莞合安机电有限公司 | Full-automatic high-pressure loop coil equipped with ball sprays zinc machine |
| CN109440045A (en) * | 2018-12-29 | 2019-03-08 | 日照钢铁控股集团有限公司 | A kind of ultra-thin process for protecting of electromagnetic induction heating coil |
| CN111363996A (en) * | 2020-04-14 | 2020-07-03 | 广州珈鹏科技有限公司 | Protective coating for electromagnetic induction heating coil and preparation method |
-
2010
- 2010-01-20 CN CN201010034508A patent/CN101752079A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106455176A (en) * | 2016-07-12 | 2017-02-22 | 西安博大电炉有限公司 | Inductor, induction coil used for inductor and manufacturing method of induction coil |
| CN106455176B (en) * | 2016-07-12 | 2019-04-19 | 西安博大电炉有限公司 | A kind of inductor, inductor induction coil and its manufacturing method |
| CN108580097A (en) * | 2017-05-25 | 2018-09-28 | 东莞合安机电有限公司 | Full-automatic high-pressure loop coil equipped with ball sprays zinc machine |
| CN109440045A (en) * | 2018-12-29 | 2019-03-08 | 日照钢铁控股集团有限公司 | A kind of ultra-thin process for protecting of electromagnetic induction heating coil |
| CN111363996A (en) * | 2020-04-14 | 2020-07-03 | 广州珈鹏科技有限公司 | Protective coating for electromagnetic induction heating coil and preparation method |
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Application publication date: 20100623 |