Lamination fabrication method of dielectric functionally graded insulator

Abstract

The invention discloses a lamination fabrication method of a dielectric functionally graded insulator. An insulator with a gradiently-changing dielectric parameter is obtained by a fabrication mode of layered lamination on the basis of a traditional insulator. The preparation method comprises the following steps of (1) figuring out volume fraction of a filler; (2) calculating mass ratio of all raw materials in a resin mixture of each layer; (3) preparing resin mixtures with different filling proportions of the filler; (4) carrying out vacuum stirring and degassing; (5) laminating the above mixtures in a die layer by layer according to a required sequence; and (6) carrying out secondary curing on the insulator in a high-temperature environment and demolding. With such insulator disclosed by the invention, the gradient change of the dielectric parameter in the insulator can be achieved, and thus, the electric resistant performance of the insulator is improved.

Description

【Technical field】 [0001] The invention belongs to the field of high-voltage equipment manufacturing, and in particular relates to a method for manufacturing 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 suffered b...

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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

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