Rotating Machine Liquid Cooling Guide Block Walls
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Solution Overview
Problem
Existing liquid cooling structures for rotating electric machines face inefficiencies when using flat lead wires, as the oil passage between coils can become larger radially, leading to wasted oil flow and reduced cooling efficiency.
Innovation Solution
The cooling structure features guide block walls with a taperingly inclined surface outside the stator, allowing cooling liquid to flow effectively through a constant gap between the coil and the guide block wall, ensuring efficient cooling without waste flow, even with flat lead wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a coil is formed of a flat lead wire having a rectangular cross section, then the coil structure is simplified and manufacturing is easier, but the oil passage between adjacent coils becomes larger radially causing waste of oil flow and reduced cooling efficiency
Solution Approach 1:
The guide block wall acts as an intermediary structure between adjacent coils to control and regulate the oil passage. By introducing this mediator component, the patent achieves both simplified flat lead wire construction and controlled oil flow paths, preventing waste flow while maintaining manufacturing ease.
Solution Approach 2:
The guide block wall creates a localized controlled environment for oil flow between coils. By applying this local structural modification, the patent maintains the overall simplicity of flat lead wire coils while creating specific zones where oil flow is properly controlled to prevent waste and ensure efficient cooling.
2Adaptability or versatility
If the oil passage between adjacent coils is enlarged radially to accommodate flat lead wires, then the coil structure is simplified, but the cooling liquid flow becomes wasted and cooling efficiency decreases
Solution Approach 1:
The guide block wall serves as a mediating structure that enables the use of flat lead wires with improved adaptability while simultaneously controlling the oil passage to maintain high cooling efficiency. This intermediary component resolves the conflict between structural adaptability and cooling productivity.
Solution Approach 2:
The guide block wall modifies the geometric parameters of the oil passage by creating a controlled gap between adjacent coils. This parameter change allows the system to accommodate flat lead wires while maintaining optimal oil flow characteristics for efficient cooling.
3Loss of energy
If guide block walls are positioned adjacent to each other to close the gap between teeth portions, then cooling liquid flows effectively through the coil gap, but the device complexity increases
Solution Approach 1:
The guide block walls are merged with the existing bobbin structure, integrating the cooling flow control function into the coil support structure. This merging approach improves cooling efficiency while minimizing the increase in overall device complexity by combining multiple functions into a single integrated component.
Solution Approach 2:
The guide block wall performs multiple functions: it structures the oil passage, guides cooling liquid flow, and provides mechanical support for the coil assembly. This multi-functionality reduces the need for separate components, thereby improving cooling efficiency without proportionally increasing device complexity.
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 effectively utilizes the cooling liquid to maintain high cooling efficiency by ensuring consistent contact between the liquid and the coils, preventing waste flow and enhancing the overall cooling performance.
Implementation Method 1
most of the cooling liquid is allowed to flow into the gap between the coil and the guide block wall and flow therethrough while guided by the guide block wall, thereby entirely cooling the coils
Implementation Method 2
cooling liquid to flow effectively through a constant gap between the coil and the guide block wall, ensuring efficient cooling without waste flow
Data Source
Figure 1A~1C
Figure 2A~2C
Figure 3
AI summary
Provided is a liquid cooling structure of a rotating electric machine, which is capable of suppressing the reduction of cooling efficiency even with a coil using a flat lead wire. Guide block walls 12Ac are provided on both sides in the width direction of a bobbin 12 along the axial direction of a stator 10 so as to position each between adjacent teeth portions 11b in the circumferential direction of a stator core 11 of the stator. A gap is formed between the coil 13 and the guide block wall 12Ac, and the guide block walls 12Ac are positioned adjacent to each other so as to make a closing between the guide block walls 12Ac of adjacent bobbins 12.