Impregnated fiber capacitive sleeve

By using a multi-layer composite structure of resin-impregnated fiber capacitor sleeves, the problems of low dielectric constant and poor thermal conductivity of traditional solid dielectric materials are solved, achieving high capacitance, low discharge risk and good heat dissipation, thus extending the service life of the equipment.

CN224287879UActive Publication Date: 2026-05-26ANGNORE (JIANGSU) HIGH VOLTAGE ELECTRIC CO LTD
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Patent Information

Application Number
CN202520569691.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-03-28
Publication Date
2026-05-26
Estimated Expiration
2035-03-28

AI Technical Summary

Technical Problem

Traditional solid dielectric materials have low dielectric constants, resulting in small capacitance, severe electric field distortion, and a tendency for partial discharge. They also have poor thermal conductivity, leading to aging of insulating materials and shortened equipment lifespan.

Method used

The adhesive-impregnated fiber capacitor-type bushing includes an insulating substrate layer, a dielectric reinforcement layer, a liquid filling layer, and a mechanical reinforcement layer. The dielectric properties and thermal conductivity are optimized through a multi-layer composite structure, and the electric field distribution and heat dissipation performance are optimized by using high dielectric materials and liquid filling layers.

Benefits of technology

It significantly improves capacitor characteristics, reduces the risk of partial discharge, enhances electric field uniformity and heat dissipation efficiency, and extends equipment lifespan.

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Abstract

The utility model discloses a glue impregnated fiber capacitance type bushing, which comprises an insulating base body layer, a dielectric enhancement layer, a liquid filling layer, a mechanical enhancement layer and an outer layer protection structure. The insulating matrix layer is made of impregnated glass fiber, aramid fiber or polyimide fiber material and forms a tubular structure; and the dielectric enhancement layer is positioned on the outer side of the insulating matrix layer and is filled with a high dielectric material with a porous sintered structure. According to the utility model, through the combination of the porous dielectric enhancement layer with a high dielectric constant and the liquid filling layer, the capacitance characteristic is effectively improved, the partial discharge (PD) risk is reduced, the heat dissipation capability is enhanced through the heat conduction channel and the heat conduction filling layer, and the problem of overhigh local temperature rise is avoided. Meanwhile, the cross winding type mechanical strengthening layer is adopted, the structural strength of the casing pipe is improved, and the long-term operation stability of the casing pipe is improved. The bushing is suitable for the fields of high-voltage power transmission equipment, capacitors, cable insulation systems and the like, and the electrical insulation performance and reliability of the equipment are improved.
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