Dual-Drum Lifting Device for Wire Tension Control
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Solution Overview
Problem
Long wires lifted by winches often experience tightening issues when lifted in multiple layers, leading to wire biting into lower layers and causing deformation, making it difficult to unreel them.
Innovation Solution
A lifting device with two drums, where the first drum winds the wire in a single layer and feeds it to the second drum, reducing tension and preventing wire biting by using a motor-driven system to manage the wire's tension effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a single winch lifts a long wire in multiple layers, then the wire can be lifted to great heights, but the wire tension becomes large causing the wire to bite into lower layers and tighten
Solution Approach 1:
The wire lifting function is segmented into two independent drums: the first drum winds the wire in a single layer to lift it, while the second drum receives the wire from the first drum and winds it in multiple layers. This segmentation allows the wire to be lifted in a controlled single-layer manner initially, preventing excessive tension and biting, while still achieving long wire deployment through the combined action of both drums.
2Volume of moving object
If a single winch winds wire in multiple layers, then the wire can be stored compactly, but the wire experiences tightening and deformation
Solution Approach 1:
The wire winding process is divided into two stages: the first drum performs single-layer winding to maintain wire integrity and prevent tightening, while the second drum performs multi-layer winding to achieve compact storage. This sequential segmentation ensures that the wire is only compacted after being properly lifted and positioned, maintaining reliability while achieving volume reduction.
3Device complexity
If a single winch lifts wire directly, then the device structure is simple, but the wire tension is too large causing biting and tightening
Solution Approach 1:
The lifting device is segmented into two drums with distinct functions: the first drum is responsible for single-layer winding and initial wire lifting, while the second drum handles multiple-layer winding and wire storage. This functional segmentation distributes the tension management across two components, preventing excessive force concentration that would cause wire biting and tightening.
Solution Approach 2:
The first drum acts as an intermediary between the wire source and the second drum. It performs the critical function of initial single-layer winding, which controls tension and prevents wire damage before the wire is transferred to the second drum for compact multi-layer storage. This intermediary role protects the wire from the harmful effects of direct multi-layer winding.
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 solution effectively suppresses wire tightening, allowing for smooth reeling and unreeling of long wires without deformation, even at high tensions, enhancing operational efficiency.
Implementation Method 1
a first motor that rotates the first drum
Implementation Method 2
a second motor that rotates the second drum
Data Source
AI summary
The lifting device includes a first drum around which a wire is wound, a first motor that rotates the first drum, a second drum around which the wire fed from the first drum is wound, and a second motor that rotates the second drum. The first motor is driven to rotate the first drum so as to lift the wire, and the second motor is driven to rotate the second drum to lift the wire fed from the first drum.