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Centrifugal manufacturing method for dielectric functional gradient insulator

A technology of functional gradient and manufacturing method, applied in the direction of coating, etc., can solve the problems of unsuitable insulators, and achieve the effect of improving electric strength and mechanical properties

Inactive Publication Date: 2016-05-04
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the preparation methods of FGM materials mainly include vapor deposition method, plasma spraying method, self-propagating high temperature synthesis method, powder metallurgy method, etc. These methods are suitable for the preparation of metal and ceramic FGM materials, but not suitable for the preparation of mainly epoxy resin. High voltage equipment insulators composed of representative polymer composites

Method used

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  • Centrifugal manufacturing method for dielectric functional gradient insulator
  • Centrifugal manufacturing method for dielectric functional gradient insulator
  • Centrifugal manufacturing method for dielectric functional gradient insulator

Examples

Experimental program
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Effect test

Embodiment 1

[0039] see figure 1 and figure 2 As shown, the centrifugal manufacturing method of the dielectrically graded insulator of the present invention comprises the following steps:

[0040] Step 1, under normal temperature and normal pressure, E-51 epoxy resin (relative dielectric constant value is 3.5), methyltetrahydrophthalic anhydride, strontium titanate (average particle size is 1 μm, relative dielectric constant value is 332) Mix to obtain a resin mixture. Wherein the mass fraction ratio of epoxy resin, curing agent and filler is 30:30:40.

[0041] Step 2, put the resin mixture in a vacuum chamber (atmospheric pressure of 0.02MPa), heat it to 80°C, stir it mechanically to disperse the filler evenly in the mixture, and fully remove the air bubbles in the mixture. The processing time is 0.5h .

[0042] Step 3, the mixture is cooled to normal temperature, and 2,4,6-tris(dimethylaminomethyl)phenol curing accelerator is added dropwise thereto (the added mass is 0.2% of the tot...

Embodiment 2

[0047] see figure 1 and figure 2 As shown, the centrifugal manufacturing method of the dielectrically graded insulator of the present invention comprises the following steps:

[0048] Step 1, at normal temperature and normal pressure, E-51 epoxy resin (relative dielectric constant value is 3.5), methyltetrahydrophthalic anhydride, titanium dioxide (average particle diameter is 0.75 μm, relative dielectric constant value is 114) and Alumina (average particle size: 3.3 μm, relative permittivity value: 9.3) was mixed to obtain a resin compound. Wherein the mass fraction ratio of epoxy resin, curing agent, filler titanium dioxide and filler alumina is 20:20:20:40.

[0049] Step 2, put the resin mixture in a vacuum chamber (atmospheric pressure of 0.02MPa), heat it to 80°C, stir it mechanically to disperse the filler evenly in the mixture, and fully remove the air bubbles in the mixture. The processing time is 0.5h .

[0050] Step 3, the mixture is cooled to normal temperature...

Embodiment 3

[0055] see figure 1 and figure 2 As shown, the centrifugal manufacturing method of the dielectrically graded insulator of the present invention comprises the following steps:

[0056] Step 1: Mix E-44 epoxy resin (with a relative dielectric constant value of 3.5), methyltetrahydrophthalic anhydride, titanium dioxide, graphite and silicon dioxide at normal temperature and pressure to obtain a resin mixture. Wherein the mass fraction ratio of epoxy resin, curing agent, filler titanium dioxide, filler graphite and filler silicon dioxide is 20:20:20:10:30.

[0057] Step 2, put the resin mixture in a vacuum chamber (atmospheric pressure of 0.02MPa), heat it to 80°C, stir it mechanically to disperse the filler evenly in the mixture, and fully remove the air bubbles in the mixture. The processing time is 0.5h .

[0058] Step 3, the mixture is cooled to normal temperature, and 2,4,6-tris(dimethylaminomethyl)phenol curing accelerator is added dropwise therein (the added mass is 0.1...

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Abstract

The invention discloses a centrifugal manufacturing method for a dielectric functional gradient insulator. The centrifugal manufacturing method applies a centrifugal force to enable the concentration of a high dielectric filler to realize continuous gradient distribution so as to obtain the insulator, the dielectric parameters of which are in continuous gradient variation. The preparation method comprises the following steps: (1) preparing a resin mixture according to a certain proportion; (2) carrying out vacuum mixing and degassing; (3) placing the mixture into a tailored mold, and mounting the mold on a centrifugal machine; (4) starting up the centrifugal machine to centrifuge the mixture; (5) stopping the centrifugal machine, taking down the mold, solidifying the insulator under the high temperature environment and demolding. The insulator manufacturing method disclosed by the invention can enable the dielectric parameters to achieve continuous gradient variation inside the insulator, so as to effectively improve the whole electric strength of the insulator.

Description

【Technical field】 [0001] The invention belongs to the field of high-voltage equipment manufacturing, and in particular relates to a centrifugal manufacturing method of dielectric function gradient insulators. 【Background technique】 [0002] In EHV / UHV power equipment and pulse power equipment, discharge damage to the solid insulation system occurs from time to time. Such damage accidents are often caused by weak insulation performance caused by uneven electric field, which brings high costs to design and manufacture. The technical difficulty and cost seriously endanger the safe and reliable operation of the system, and limit the further development of equipment in the direction of "miniaturization" and "integration". [0003] It is generally believed that the uneven distribution of the electric field is an important cause of insulation breakdown damage and poor electrical resistance. For most EHV / UHV power equipment and pulse power equipment, the electric field distribution...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L63/02C08K3/24C08K3/22C08K3/04C08K3/36C08G59/42C08G59/62B29C41/04B29C41/34
CPCC08K3/04C08K3/22C08K3/24C08K3/36B29C41/04B29C41/34C08K2201/005C08K2003/2227C08K2003/2241C08L63/00
Inventor 张冠军刘哲李文栋杨庆浩杨国清
Owner XI AN JIAOTONG UNIV
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