CN105467281B - A method of improving solid insulating material surface flashover characteristics - Google Patents
A method of improving solid insulating material surface flashover characteristics Download PDFInfo
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- CN105467281B CN105467281B CN201510808474.3A CN201510808474A CN105467281B CN 105467281 B CN105467281 B CN 105467281B CN 201510808474 A CN201510808474 A CN 201510808474A CN 105467281 B CN105467281 B CN 105467281B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
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Abstract
The present invention discloses a kind of method improving solid insulating material surface flashover characteristics, includes the following steps：Depression treatment is carried out on the surface of solid insulating material and forms recess, and prepares layer of metal film electrode in the valley；The shape of the recess is matched with the electrode shape being arranged on solid insulating material；The depth of the recess is more than the height of metal film electrode, and metal film electrode is deposited on concave bottom；In electrode insertion recess and it is close to metal film electrode.The present invention prepares metal film electrode (such as gold, silver, copper) to eliminate the gap between electrode and solid insulating material on insulating materials surface, improves contact between the two, improves the flashover voltage of system；Metal electrode is embedded in inside insulating materials, three junctions in electrode, material and atmosphere in preparation process can be effectively prevented from and form new electric field distortion point and the possibility that reduces flashover voltage.
Description
Technical field
The present invention relates to insulator technology field, more particularly to a kind of side for improving solid insulating material surface flashover characteristics
Method.
Background technology
Main function of the solid insulator in various high-tension apparatuses and pulse-power apparatus be support construction and it is electrical absolutely
Edge.Therefore the height of its dielectric level determines the withstanding voltage of these equipment and the size of power.But due to insulator
Composite insulation system usually is constituted with atmosphere such as gas, liquid and vacuum, and insulator is far below certainly in such system
Edge flashing will occur under the breakdown strength in body and identical size atmosphere gap, by taking aluminium oxide ceramics as an example, vacuum (10- 3Pa the critical value of disruptive field intensity) is 350kV/cm, and high-purity alpha-alumina ceramics are about 300~400kV/cm, and vacuum-oxygen
Change aluminium composite insulation system usually will occur flashover, the only resistance to electricity of vacuum in the case where the impressed field of tens kV/cm pretends use
10~30% or so of intensity.Therefore, solid insulator edge flashing phenomenon and its formation mechenism are studied, finds and improves its flashover
The method of voltage is significant.
The factor for influencing material edge flashing is more, such as applies voltage waveform, insulator geometry and length, insulator
Geometric area, insulator surface processing, insulating material dielectric constant, insulator pre-arcing processing, electrode material and its geometry
Shape, Multilayer High Gradient Insulator Technology etc. wherein electrode structure and its have larger shadow with the way of contact of material to flashover voltage
It rings.
Invention content
The purpose of the present invention is to provide a kind of methods improving solid insulating material surface flashover characteristics, by insulating
Material surface forms metal film electrode to improve electrode-media contact, while electrode being embedded in inside insulating materials, to improve it
Flashover voltage.
To achieve the above object, the present invention is achieved by the following technical programs：
A method of solid insulating material surface flashover characteristics are improved, are included the following steps：In solid insulating material
Surface carries out depression treatment and forms recess, and prepares layer of metal film electrode in the valley；The shape of the recess exists with setting
Electrode shape on solid insulating material matches.
Further, the depth of the recess is more than the height of metal film electrode, and metal film electrode is deposited on concave bottom.
Further, using the methods of sputtering, hot evaporation, plasma activated chemical vapour deposition in the recessed of solid insulating material
It falls into region bottom surface and prepares metal film electrode.
Further, the material of the metal film electrode is the good metal materials of electric conductivities such as gold, silver, copper.
Further, electrode insertion recess is interior and is close to metal film electrode.
Further, the material of the solid insulating material is organic glass；Size Φ 35mm × 4mm, electrode are circle
Electrode, height 2mm；Concave shape is circle, depth 3mm；The material of metal film electrode prepared by concave bottom is gold, thickness
For 10nm.
Further, the surface of the solid insulating material is arranged at intervals with two recess, and each concave bottom preparation has
Metal film electrode；The electrode as cathode and anode is glued on two metal film electrodes respectively.
Compared with the existing technology, the invention has the advantages that：In Practical Project, often deposited between electrode and material
In gap, the electric field strength of (electrode, material, atmosphere) at three binding sites that distort is caused the drop of flashover voltage by the presence in gap
Low, therefore, the present invention prepares metal film electrode (such as gold, silver, copper) to eliminate electrode and solid insulation on insulating materials surface
Gap between material improves contact between the two, improves the flashover voltage of system；Recess is carried out to material surface simultaneously
Reason, and metal electrode is embedded, it can avoid three knots in electrode, material and atmosphere during preparing metal film electrode
New electric field distortion point is formed at conjunction and reduces the possibility of flashover voltage.
Description of the drawings
Fig. 1 is surface indentation of the present invention treated insulating materials schematic diagram.
Fig. 2 show the cover schematic diagram used in the present invention.
Fig. 3 show that treated insulating materials and the cover combination diagram, in figure：1 is the cover, and 2 be solid insulation material
Material.
Fig. 4 show flow chart of the method for the present invention.
Fig. 5 show insulation system schematic diagram in embodiment.In figure：2 be the solid insulating material handled well, and 3 be two
Circular electrode, 4 be two metal film electrodes.
Specific implementation mode
Below in conjunction with drawings and the specific embodiments, the present invention is described in further detail：
A kind of method improving solid insulating material surface flashover characteristics of the present invention, specifically includes following steps：
Step 1：The insulation index that solid insulation structure is determined according to practical working situation designs each of insulation system with this
Item parameter：Specifically include the selection of solid insulating material and the form parameter of electrode, the design of dimensional parameters；
Step 2：According in above-mentioned steps (1) electrode shape and dimensional parameters on 2 surface of solid insulating material of selection
Depression treatment is carried out, sunk area is matched to ensure that electrode can be embedded, as shown in Figure 1 with electrode shape.Root simultaneously
The cover 1 is made according to electrode shape, as shown in Fig. 2, its shape need to be matched with sunk area to ensure that metallic can all sink
Product is in sunk area bottom surface, and the cover material therefor is generally metal material, and wherein the cover is metal in the wall thickness of sunk area
Membrane electrode is at a distance from recess inner wall, generally 1mm.
Step 3：The insulating materials and the cover handled well in above-mentioned steps (2) are combined, as shown in figure 3, utilizing
The methods of sputtering, hot evaporation, plasma activated chemical vapour deposition prepare metal film electrode in material recess region bottom surface.
Solid insulating material prepared by the present invention by electrode insertion in use, being recessed interior and being close to metal film electrode.
Embodiment：
Step (1)：Electrode is circular electrode, height 2mm, diameter 10mm；It chooses organic glass (PMMA) and is used as insulation material
Material, size Φ 35mm × 4mm；
Step (2)：Depression treatment is carried out on organic glass, forms two circular recessed regions at a distance of 5mm, depth
For 3mm, and diameter is identical as circular electrode diameter；The cover used when sputtering, cover material are made according to electrode shape simultaneously
For stainless steel, shape is matched with two sunk areas, it is ensured that metallic can all be deposited on two sunk area bottom surfaces.
Step (3)：The insulating materials and the cover handled well in above-mentioned steps (2) are combined, and splashed using ion
Instrument is penetrated to material recess region bottom surface splash-proofing sputtering metal membrane electrode (material is gold, thickness 10nm), then again by the sample and electricity
The insulation system that pole is assembled to form, as shown in figure 5,2 being the solid insulating material handled well in figure, 3 be two circular electrodes；
The insulation system formed in above-mentioned steps (3) is tested on surface flashover characteristics test platform, test waves
Shape is standard lightning wave (1.2/50 μ s), and test parameter is flashover field strength E for the first timefb, seasoned field strength EcoAnd tolerance field strength Eho。
The vacuum surface flashover field strength of insulating materials is as shown in table 1 before and after the processing.
Table 1 before and after the processing insulation system flashover field strength compare (unit：kV/cm)
| Efb | Eco | Eho | |
| It is untreated | 28.76 | 36.4 | 35.2 |
| After processing | 56.4 | 73.8 | 67.2 |
As can be seen that after treatment, the field strength of the flashover for the first time E of materialfbImprove 96.1%；Seasoned field strength EcoIt improves
102.7%；It is resistant to field strength EhoImprove 90.9%.By embodiment as it can be seen that the present invention can greatly improve insulating materials along face
Flashover property.
Claims (4)
1. a kind of method improving solid insulating material surface flashover characteristics, which is characterized in that include the following steps：It is exhausted in solid
The surface of edge material carries out depression treatment and forms recess, and prepares layer of metal film electrode in the valley；The shape of the recess
It is matched with the electrode shape being arranged on solid insulating material；
In electrode insertion recess and it is close to metal film electrode；
The surface of the solid insulating material is arranged at intervals with two recess, and each concave bottom deposition has metal film electrode；Two
The electrode as cathode and anode is glued on a metal film electrode respectively.
2. a kind of method improving solid insulating material surface flashover characteristics according to claim 1, which is characterized in that institute
The depth for stating recess is more than the height of metal film electrode, and metal film electrode is deposited on concave bottom.
3. a kind of method improving solid insulating material surface flashover characteristics according to claim 1, which is characterized in that institute
The material for stating metal film electrode is gold, silver, copper.
4. a kind of method improving solid insulating material surface flashover characteristics according to claim 1, which is characterized in that institute
The material for stating solid insulating material is organic glass；Size Φ 35mm × 4mm, electrode are circular electrode, height 2mm；Concave shape
Shape is circle, depth 3mm；The material of the metal film electrode of concave bottom deposition is gold, thickness 10nm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510808474.3A CN105467281B (en) | 2015-11-19 | 2015-11-19 | A method of improving solid insulating material surface flashover characteristics |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510808474.3A CN105467281B (en) | 2015-11-19 | 2015-11-19 | A method of improving solid insulating material surface flashover characteristics |
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| Publication Number | Publication Date |
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| CN105467281A CN105467281A (en) | 2016-04-06 |
| CN105467281B true CN105467281B (en) | 2018-09-04 |
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| CN116598861B (en) * | 2023-07-13 | 2023-10-20 | 西安交通大学 | Structure, insulating material and method for inhibiting metal particles |
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| CN100561610C (en) * | 2007-11-16 | 2009-11-18 | 西安交通大学 | A kind of method that improves surface flashover voltage of vacuum insulating medium |
| CN103247395B (en) * | 2013-04-25 | 2016-08-24 | 西北核技术研究所 | A kind of multi-layer high gradient insulator and preparation method thereof |
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