Water-Cooling Structure for Electric Motor Using Vortex-Forming Sections
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Solution Overview
Problem
Conventional water-cooling structures for electric motors suffer from poor heat exchange efficiency and dissipation due to quick flow of cooling liquid through one-way smooth passages, resulting in inadequate heat transfer and dissipation.
Innovation Solution
The introduction of a water-cooling structure that creates separated vortexes and flow-dividing sections in the main flow passage to enhance turbulence and increase the heat transfer area, allowing for improved heat dissipation by forcing the cooling liquid to flow through multiple sub-passages, thereby creating a vortex effect and increasing thermal convection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a one-way smooth flow passage is used for cooling liquid circulation, then the structure is simple and easy to manufacture, but the cooling liquid flows too quickly resulting in poor heat exchange efficiency
Solution Approach 1:
The flow passage is segmented into multiple sub-passages by introducing flow-dividing sections with protrusions. The cooling liquid is divided into multiple streams that flow through different sub-passages, increasing the effective heat transfer area and residence time without significantly complicating the overall structure
Solution Approach 2:
Vortex-forming sections are introduced to create rotational flow patterns in the cooling liquid. The curved geometry of these sections generates vortexes that enhance turbulence and heat transfer efficiency while maintaining a relatively simple structural form
2Speed
If the cooling liquid flows quickly through the flow passage, then the flow rate is high, but the residence time is short resulting in poor heat dissipation effect
Solution Approach 1:
By dividing the single flow passage into multiple sub-passages, the total flow path length is effectively increased while maintaining the same inlet and outlet positions. This segmentation forces the cooling liquid to traverse a longer path at reduced velocity in each sub-passage, increasing residence time and heat transfer effectiveness
Solution Approach 2:
The vortex-forming sections create rotational motion that increases the effective path length of the cooling liquid through the heat-dissipation base. The spiral flow pattern extends the residence time and enhances convective heat transfer without requiring a proportional increase in passage length
3Device complexity
If a simple smooth flow passage is used, then the device complexity is low, but the heat transfer area is insufficient resulting in poor heat exchange efficiency
Solution Approach 1:
The flow passage is divided into multiple sub-passages by adding flow-dividing protrusions. This segmentation effectively multiplies the heat transfer area by creating parallel flow paths that all contact the heat-dissipation base, increasing the total surface area available for heat exchange without requiring a proportionally larger overall structure
Solution Approach 2:
The flow-dividing protrusions extend into the flow passage from the heat-dissipation base, utilizing the radial dimension to create additional heat transfer surfaces. This dimensional approach increases the heat transfer area by adding surfaces at different radial positions rather than simply extending the axial length
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 significantly enhances heat exchange efficiency and dissipation effects by increasing the contact area and turbulence of the cooling liquid, leading to improved thermal convection and overall heat transfer performance.
Implementation Method 1
at least one vortex-forming section protruding from a central position between the two inner sidewalls of the main flow passage into the main flow passage along an axial direction of the heat-dissipation base
Implementation Method 2
separated vortexes can be created in a cooling liquid flowing through the water-cooling structure to enable enhanced flow field turbulence and accordingly upgraded heat transfer performance
Implementation Method 3
a flow-dividing structure is provided in a main flow passage to create divided flows. The flow-dividing structure provides increased heat transfer area for contacting with a cooling liquid flowing through the main flow passage
Implementation Method 4
A type of cooling liquid, such as water or a coolant, circulates in the flow passage 313 to exchange heat with the heat-dissipation base 31, so as to achieve the purpose of heat dissipation
Implementation Method 5
increasing the contact area and turbulence of the cooling liquid, leading to improved thermal convection and overall heat transfer performance
Data Source
AI summary
A water-cooling structure for electric motor includes a motor main body, a heat-dissipation base, and a vortex-forming section. The motor main body is externally fitted around the heat-dissipation base. The heat-dissipation base is provided around an outer circumferential surface with at least one main flow passage. The vortex-forming section is provided in the main flow passage to create vortex effect on a type of cooling liquid flowing in the main flow passage, so as to enable an increased heat transfer efficiency of the water-cooling structure.