Torque Balanced Metal Sheathed Cable Design
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Solution Overview
Problem
Metal sheathed cables used in deep-sea ROVs and submarine detection systems are prone to twisting and breaking under working loads due to torque deviation between layers, leading to economic losses.
Innovation Solution
A metal sheathed cable design incorporating a torque balance method, where the sheathing layer is twisted with a specific design formula (T=P*D2*sinθ=PWE=WA*ɛ) to eliminate torque deviation, ensuring the cable does not rotate under load, comprising an optical unit, control unit, power unit, grounding wire unit, filling core, taped covering, and a sheathing layer with ultra-high tensile steel wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the steel wire sheathing layer is twisted with multiple layers to provide mechanical strength, then the cable gains higher tensile strength and flexibility, but torque deviation occurs between layers causing the cable to rotate or break under working load
Solution Approach 1:
The patent applies counter-torque design where the inner and outer steel wire layers are twisted in opposite directions (inner layer counterclockwise, outer layer clockwise). This creates counterbalancing torques that offset each other, preventing net rotation and twisting under working load while maintaining the mechanical strength provided by the multi-layer twisted structure
2Adaptability or versatility
If the steel wire sheathing layer is twisted to achieve flexible bending property, then the cable becomes more adaptable to movement, but it becomes more prone to twisting and breaking under working load
Solution Approach 1:
The flexible bending property is maintained through the twisted multi-layer structure, while the counter-torque design (inner layer counterclockwise, outer layer clockwise) prevents excessive twisting and breaking by balancing the torques, thus maintaining reliability despite the flexibility required for adaptability
3Device complexity
If a simple single-layer steel wire sheathing is used, then the cable structure is simpler, but it cannot provide sufficient mechanical strength and is prone to twisting under load
Solution Approach 1:
The sheathing layer is segmented into multiple independent steel wire layers (inner and outer layers) twisted in opposite directions. This segmentation allows each layer to contribute to the overall mechanical strength while the opposite twisting directions create counterbalancing torques, preventing rotation under load
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The torque balance design effectively prevents twisting and breaking of the metal sheathed cable under working loads, ensuring the structural integrity and reliability of deep-sea ROVs and submarine detection systems.
Implementation Method 1
the steel wire sheathing layer is generally twisted counterclockwise by two or three layers of ultra-high tensile steel wires so as to be equipped with the mechanical strength as the operational requirements required
Implementation Method 2
the steel wire sheathing layer may adopt a torque balance design so as to eliminate the torque deviation existing between layers inside a steel wire sheathing layer of a metal sheathed cable at the structural design level, thereby guaranteeing that the metal sheathed cable does not rotate when bearing a working load
Data Source
AI summary
A metal sheathed cable includes an optical unit and a control unit helically twisted together, a grounding wire unit distributed in the gaps between the optical unit and the control unit to form an inner layer cable core, a filler watertightly filled into gaps among the optical unit, the control unit and the grounding wire unit, and a taped covering arranged outside the inner layer cable core; a power unit and a filling core helically twisted around the inner layer cable core, the grounding wire unit distributed in the gap between the power unit and the filling core, the filler watertightly filled into gaps among the power unit, the grounding wire unit and the filling core, and the taped covering arranged outside the outer layer cable core; an inner protective layer wrapped outside the outer layer core, and a sheathing layer twisted outside the inner protective layer.