Rotating Electric Machine Axial Guide and Centering Element
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Solution Overview
Problem
Existing rotating electrical machines face challenges in assembly and disassembly within host elements, particularly due to the integration of active parts like the rotor and stator, which complicates mechanical coupling and maintenance.
Innovation Solution
The design incorporates an axial guide element and centering element within the casing of the rotating electrical machine, allowing for controlled positioning and easy disassembly, along with a modular structure that can be tested independently before integration, and includes a cooling circuit for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the active parts (rotor and stator) are integrated into the host element, then the machine structure is more compact, but the assembly and disassembly becomes difficult
Solution Approach 1:
The machine is divided into separable components: the active parts (rotor and stator assembly) are integrated into a casing that forms a complete but detachable module. This module can be assembled as a unit and then installed into the host element, allowing easy removal for maintenance while maintaining compact integration during operation.
Solution Approach 2:
The complete active parts assembly with its casing is extracted as a separate removable module from the host element. This allows the entire rotor-stator-casing assembly to be taken out as one unit for maintenance or replacement without disassembling the host element, solving the contradiction between integration and ease of maintenance.
2Device complexity
If the rotor and stator are integrated into the casing, then the machine structure is simplified, but the positioning precision during assembly deteriorates
Solution Approach 1:
Guiding elements and centering elements are introduced as intermediary components between the casing and the host element. These elements facilitate precise positioning and alignment during assembly without requiring complex machining or adjustment procedures, thus maintaining structural simplicity while achieving high positioning precision.
Solution Approach 2:
The guiding and centering elements are pre-formed as integral parts of the casing structure. This preliminary preparation of positioning features ensures that when the casing is installed into the host element, the active parts are automatically and precisely positioned without requiring additional alignment operations.
3Reliability
If the machine is designed as a complete autonomous unit, then the pre-testing capability is improved, but the integration complexity with host element increases
Solution Approach 1:
The machine is segmented into a self-contained module consisting of the casing, rotor, and stator that can be assembled, tested, and certified independently before final installation. This modular segmentation enables complete autonomous testing while the standardized interface simplifies the actual integration with the host element.
Solution Approach 2:
The casing is designed with universal features including standardized mounting interfaces, integrated guiding elements, and built-in centering mechanisms that work across different host element applications. This multi-functionality allows the complete machine module to be tested independently and then integrated into various host elements without redesign.
Data Source
Figure 1~2
Figure 3a~3b
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AI summary
The invention relates mainly to a rotary electric machine (10), in particular for a motor vehicle, comprising a casing (16), characterised in that said casing (16) comprises: an element (42) for axially guiding said rotary electric machine (10) during the insertion thereof into a shell (21) of a host element (20) intended for being mechanically coupled with said rotary electric machine (10), and an element (42, 62) for centring said rotary electric machine (10) relative to said shell (21) of said host element (20).