Two-Segment Electric Machine Housing Jacket for Cooling
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Solution Overview
Problem
The production of complex cooling channel structures in stator housings for electrical machines is costly and time-consuming, requiring advanced casting processes and posing challenges in design and contamination protection.
Innovation Solution
The stator housing is divided into two segments: a simple geometric segment for cost-effective production and a complex segment for advanced cooling channel creation, with connecting ducts forming a continuous cooling channel, allowing for reduced manufacturing effort and overall costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If complex cooling channel structures are produced by casting using contoured casting tools, then effective heat dissipation is achieved, but production costs increase and manufacturing complexity increases
Solution Approach 1:
The housing jacket is divided into two segments: a first segment with simple geometric cooling channels produced by conventional casting, and a second segment with complex cooling channels produced by advanced casting techniques. This segmentation allows each segment to be optimized for its specific manufacturing requirements while maintaining overall cooling effectiveness.
Solution Approach 2:
The two housing jacket segments are joined together to form a complete housing with continuous cooling channels. The simple first segment and complex second segment are combined through precision joining techniques, merging the advantages of both manufacturing approaches while ensuring thermal continuity of the cooling system.
2Temperature
If complex cooling channel structures are produced by casting using contoured casting tools, then effective heat dissipation is achieved, but manufacturing process complexity and design demands increase
Solution Approach 1:
The cooling channel system is segmented into simple and complex regions, with each region assigned to a specific housing jacket segment. This allows the complex casting process to be localized to only the necessary area rather than requiring the entire housing to be produced with advanced techniques.
Solution Approach 2:
Different manufacturing qualities are applied to different regions of the housing jacket. The first segment uses conventional casting suitable for simple channels, while the second segment employs advanced casting techniques specifically where complex cooling patterns are required for optimal heat dissipation.
3Ease of manufacture
If the housing is divided into simple and complex geometric areas, then production costs are reduced, but the number of components and assembly steps increases
Solution Approach 1:
The two housing jacket segments are joined through precision machining and bonding processes that create a near-integral structure. The joining interface is designed to minimize assembly complexity while maintaining the cost advantages of segmented production, effectively merging the segments into a unified housing component.
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 approach simplifies the production of the housing jacket, reduces costs, and maintains effective heat dissipation while ensuring mechanical stability and reliability of the cooling channel structure.
Implementation Method 1
these cooling fins or cooling channels can be used to conduct a cooling liquid
Implementation Method 2
The frictional connection is usually realized via a press fit between the stator core and the stator housing
Implementation Method 3
during assembly, the stator housing is heated so that it expands and the stator pack is cooled so that it contracts
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
The invention relates to a hollow cylindrical housing jacket (10) of an electric machine, which has a first jacket segment (10) having inner cooling channels (18), which are separated from each other and which extend from one circumferential end face (14) to the other circumferential end face (14) of the first jacket segment (12). In a second jacket segment (20), connecting channels (24) extend internally, which connecting channels cause a cooling-channel deflection in such a way that every pair of cooling channels (18) adjacent in the first jacket segment is connected by a cooling channel (24) in such a way that a continuous cooling channel of the housing jacket (10) is formed.