A kind of insulator and its preparation method

An insulator and substrate technology, applied in the field of insulating devices and their preparation, can solve the problems of low surface breakdown voltage resistance of insulators, difficult to meet the vacuum insulation requirements of high-voltage devices, poor reliability, etc., so as to reduce surface electric field inhomogeneity and suppress flashing network development, buffering effect of differences in thermal expansion coefficients
CN110136899BActive Publication Date: 2021-07-02NORTHWEST INST OF NUCLEAR TECH
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Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Patents(China)
Current Assignee / Owner
NORTHWEST INST OF NUCLEAR TECH
Publication Date
2021-07-02

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Abstract

The invention belongs to an insulating device and a preparation method thereof, in particular to an insulator and a preparation method thereof. The invention solves the problems of low surface breakdown resistance, poor reliability and difficulty in meeting the vacuum insulation requirements of high-voltage devices in existing insulators. An insulator includes an insulator base body and an elastic conductive ring. The outer surface of the insulator base body is provided with a plurality of parallel annular grooves. The groove spacing between adjacent annular grooves is equal, and the elastic conductive ring is sleeved in the annular grooves. By sheathing the elastic conductive ring in the annular groove, the difficulty and cost of the preparation process of the high-gradient insulator are significantly reduced, and the stability and reliability are improved. Since it does not involve post-machining and grinding processes, it avoids unstable factors such as metal shavings and burrs on the insulating layer after traditional high-gradient insulator processing, avoids electric field distortion caused by metal shavings, and improves breakdown voltage while ensuring The consistency of insulator performance.
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Description

technical field

[0001] The invention belongs to an insulating device and a preparation method thereof, in particular to an insulator and a preparation method thereof. Background technique

[0002] According to Flashover of insulators in vacuum: the last twenty years published in "IEEE Transactions on Dielectrics & Electrical Insulation", in the field of vacuum high-voltage insulation, the interface between the vacuum and the insulator is a weak zone for withstand voltage, and surface breakdown is prone to occur under high voltage , the breakdown voltage is generally much lower than the bulk breakdown voltage and vacuum breakdown voltage of insulating materials of the same thickness. In pulsed power systems, such as high-energy particle accelerators, Z-pinch and high-power lasers, the damage or failure of insulators often manifests as vacuum surface flashover. The occurrence of insulator vacuum surface flashover seriously restricts the withstand voltage capability of high-vo...

Claims

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