Cable Drum Segmentation for Cooling Airflow
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Solution Overview
Problem
Existing cable drums with motor-driven winding cylinders face challenges in maintaining effective cooling as the number of superimposed winding layers increases, leading to impeded air flow and inadequate heat dissipation.
Innovation Solution
The cable drum incorporates axially extending spacing rods to segment winding layers, ensuring a clear passage region for cooling air to flow around each segment, with radially arranged rods providing a circumferential annular gap for airflow and reducing the risk of collision during reeling and unreeling, while a control unit coordinates rotation and displacement to maintain an orthocyclic winding pattern and adapt cooling airflow based on temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the number of mutually superimposed winding layers is increased to accommodate longer electric lines, then the energy supply capability is improved, but the air flow passage becomes increasingly impeded and cooling capacity deteriorates
Solution Approach 1:
The winding layer is segmented into multiple sections along the axial direction using spacing means (spacing rods or spacing elements). This segmentation creates multiple air flow passages that extend from the drum surface to the drum interior, allowing cooling air to reach cable windings in different layers independently. The segmentation divides the winding layer into sections, with each section having its own air flow path, thereby preventing air flow impedement even when multiple layers are superimposed.
2Length of moving object
If the number of mutually superimposed winding layers is increased to accommodate longer electric lines, then the energy supply capability is improved, but the heat dissipation becomes inadequate
Solution Approach 1:
The winding layer is segmented into multiple sections along the axial direction using spacing means (spacing rods or spacing elements). This segmentation creates multiple air flow passages that extend from the drum surface to the drum interior, allowing cooling air to reach cable windings in different layers independently. The segmentation divides the winding layer into sections, with each section having its own air flow path, thereby preventing air flow impedement even when multiple layers are superimposed.
3Temperature
If spacing rods are arranged radially to create passage regions for cooling air flow, then the cooling uniformity is improved, but the risk of collision during reeling and unreeling increases
Solution Approach 1:
The spacing means are designed to be movable relative to the winding body, allowing them to change position dynamically. During reeling and unreeling operations, the spacing means can move to avoid collision with the electric line. During normal operation, they maintain their position to create passage regions for uniform cooling air flow. This dynamic adjustment capability resolves the contradiction between achieving uniform cooling and preventing collision.
4Temperature
If the passage region width is increased to improve cooling air flow, then the cooling capacity is improved, but the winding space is reduced
Solution Approach 1:
Instead of increasing the width of passage regions in the radial direction (which would reduce winding space), the invention creates multiple passage regions by segmenting the winding layer axially. This transforms the single wide passage problem into multiple narrower passages distributed along the axial dimension. The spacing means extend axially to create these multiple passages, allowing sufficient cooling air flow without compromising radial winding space.
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
This design ensures uniform cooling around winding layers, effective heat dissipation even with multiple layers, and prevents damage to the electric line, maintaining a reproducible winding pattern and optimizing cooling airflow according to the electric line's operating conditions.
Implementation Method 1
a passage region, through which cooling air generated by means of an air conveying means, flows outward of the interior of the winding body
Implementation Method 2
The spacing means are spacing rods projecting radially on the winding body... In each of the passage regions, a plurality of spacing rods may be arranged in an evenly distributed manner along an outer circumference of the winding body. The diameter of the spacing rods in this case defines the width of the passage region kept free on the winding body for the cooling air flow.
Data Source
AI summary
A cable drum for supplying energy to an electrically operated utility vehicle includes an axially extending winding body, a winding drive for rotatably driving the winding body for reeling-up or unreeling an electric line, a spacing means for segmenting a winding layer reeled-up onto the winding body, and an air conveying means for generating cooling air through a passage region. The cooling air flows outward of the interior of the winding body. The passage region is kept clear between adjacent segments of the winding layer.