Ablative low strain composite towed cable

By designing a photoelectric composite cable core and a polyimide wrapping layer, combined with a high-modulus fiber reinforcement layer and an etched coating layer, the problems of outer diameter and strain of the composite towing cable under high temperature and ablation environments were solved, achieving the performance requirements of high strength and high temperature resistance.

CN224457686UActive Publication Date: 2026-07-038TH RES INST OF CETC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
8TH RES INST OF CETC
Filing Date
2024-12-31
Publication Date
2026-07-03

AI Technical Summary

Technical Problem

Existing composite drag cables cannot meet the requirement of an outer diameter of less than 3mm under high temperature and ablation environments, and the fiber strain is greater than 1%, which cannot simultaneously meet the requirements of high strength and high temperature resistance.

Method used

The cable adopts a composite optical-electric cable core and a polyimide wrapping layer structure. Through the parallel twisting and unidirectional spiral stranding of the polyimide fiber reinforcement layer, combined with the high-modulus fiber reinforcement layer and the etching layer, an integrated reinforcement layer is formed, which optimizes the fiber stranding direction and material usage.

Benefits of technology

It achieves the requirement of an outer diameter of less than 3mm, and the fiber strain is controlled within 1%, which improves the fiber's resistance to bending, wear and temperature, and ensures safe use and reliability under dynamic working conditions.

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Abstract

This invention provides an ablation-resistant, low-strain composite drag cable, relating to the field of cable technology. It includes an optoelectronic composite cable core and a polyimide wrapping layer. The optoelectronic composite cable core comprises fiber buffer reinforcement optical fibers and high-temperature conductors, with multiple sets of high-temperature conductors. This invention uses the optoelectronic composite cable core and the polyimide wrapping layer to form the cable core. A polyimide fiber reinforcement layer covers the outside of the cable core. The polyimide fiber reinforcement layer is wrapped using parallel twisting and unidirectional spiral twisting. The parallel twisting process forms fiber bundles with two twisting directions, further improving the consistency of fiber output. The use of spiral twisting with different twisting directions after parallel twisting, and unidirectional braiding, ensures fiber output efficiency while achieving fiber self-tightening and reducing the size of the optoelectronic composite conductor. This reduces material usage while ensuring that fiber strain can be effectively controlled within 1%.
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