Non-rotating Wire Rope Core with Partial Plastic Embedding
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Solution Overview
Problem
Existing rotation-resistant wire ropes require a high fill factor for high tensile strength, leading to brittleness and reduced bending fatigue resistance, and existing methods for creating rotation-free wire ropes involve full embedding in a plastic matrix, which is inefficient and not necessary for optimal mechanical properties.
Innovation Solution
A core rope design with inner strands embedded in a plastic matrix and outer strands partially embedded or in direct contact, allowing relative movement and compaction to enhance mechanical properties without full embedding, combined with a separate sheath if needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the core rope has a high fill factor with all strands embedded in plastic matrix, then the wire rope achieves high tensile strength, but the wire rope becomes brittle and loses bending fatigue resistance
Solution Approach 1:
The patent applies local quality by differentiating the embedding state of different strands: inner strands are fully embedded in the plastic matrix to provide tensile strength, while outer strands are left partially embedded or completely exposed to maintain flexibility and bending fatigue resistance. This selective embedding approach allows different regions of the core rope to have different properties optimized for their specific functional requirements.
2Stability of the object's composition
If all core rope strands are fully embedded in plastic matrix, then rotation resistance is achieved, but manufacturing complexity and material usage increase
Solution Approach 1:
The patent extracts the plastic matrix from certain regions of the core rope, specifically removing it from the outer strands while maintaining it in the inner strands. This extraction reduces manufacturing complexity and material usage while preserving the rotation-resistant property through the partially embedded outer strands that still maintain sufficient stability.
3Stability of the object's composition
If outer strands are fully embedded in plastic matrix, then structural stability is improved, but strand mobility and relative movement capability are reduced
Solution Approach 1:
The patent implements local quality by creating different embedding zones within the core rope structure. Inner strands are fully embedded for structural stability, while outer strands are partially embedded or exposed to enable mobility and relative movement. This spatial differentiation of embedding程度 allows the core rope to simultaneously achieve both structural stability and adaptability.
Data Source
Figure 1a~1b
Figure 1c~1d
Figure 2a
AI summary
The invention relates to a non-rotating wire rope (1; D1', D2'), in particular a non-rotating round wire rope, which has a core cable (2) and outer wires (4) which surround the core cable, said outer wires forming a single outer wire layer (3). Advantageously, the core cable (2) comprises multiple core cable inner wires (5, 6) which are introduced into a plastic matrix (9) and which are surrounded by core cable outer wires (8) that form a core cable outer layer (7). Advantageously, a relative movement of the core cable wires can be carried out in the longitudinal direction as well as in the circumferential direction. The invention additionally relates to a method for producing a non-rotating wire rope and to a lifting device comprising a drum drive which has a non-rotating wire rope according to the invention, said wire rope being designed as a running cable.