Transformer Cooling Pipe Asymmetry for Vehicle Floor Stagnation
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Solution Overview
Problem
Running wind self-cooling-type transformers experience reduced cooling performance when vehicles are stopped, due to airflow stagnation near the floor and side surfaces, leading to lower heat exchange efficiency.
Innovation Solution
A transformer design with a tank housing an iron core and coil immersed in insulating liquid, featuring a cooling unit with cooling pipes spaced closer to the floor than to the side, enhancing airflow and reducing stagnation regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If cooling pipes are arranged with uniform spacing, then manufacturing is simple, but airflow stagnation occurs in regions opposite to airflow-receiving portions, reducing cooling efficiency
Solution Approach 1:
The patent applies asymmetry by arranging cooling pipes with non-uniform spacing, where the spacing between adjacent cooling pipes varies along the airflow direction. Specifically, the spacing is smaller in the upstream region and larger in the downstream region, creating an asymmetric pattern that prevents airflow stagnation in regions opposite to airflow-receiving portions while maintaining effective cooling across all pipes.
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 design improves cooling performance by reducing airflow stagnation and pressure loss, ensuring efficient heat exchange during both stopping and running conditions.
Implementation Method 1
a cooling unit for air-cooling the insulating liquid that has flowed from the tank and returning the insulating liquid to the tank
Data Source
AI summary
A transformer includes a tank (15) that is attached under a floor (3) of a vehicle, the tank (15) being for housing an iron core, a coil, and an insulating liquid (16), thereby immersing the iron core and the coil in the insulating liquid; and a cooling unit (21) for air-cooling the insulating liquid that has flowed from the tank (15) and returning the insulating liquid to the tank (15), the cooling unit (21) including a plurality of pipes (2) arranged to be spaced from one another such that a spacing in a region relatively closer to floor (3) of the vehicle is greater than a spacing in a region relatively away from floor (3) of the vehicle.