Rotating Electrical Machine Sealing Member for Coolant Flow Paths
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing rotating electrical machines suffer from low sealability in the coolant flow path due to the integral molding of the boundary wall with the center bracket, leading to inefficiencies in heat management and performance.
Innovation Solution
A rotating electrical machine design incorporating a sealing member with a base portion and a convex portion, mounted between the stator frame and the housing, which forms a recessed area to enhance sealability and reduce frictional forces during assembly, ensuring effective coolant flow and improved coaxial accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the boundary wall is integrally molded with the center bracket by casting, then the manufacturing process is simplified, but the sealability in the coolant flow path is reduced
Solution Approach 1:
The boundary wall is separated from the center bracket into an independent sealing member. This sealing member is inserted into a recess portion of the housing and positioned between the stator frame and housing, creating a distinct sealing component that can be independently optimized for sealing performance while maintaining ease of assembly through modular construction
Solution Approach 2:
The sealing member acts as an intermediary component between the stator frame and housing. It includes a base portion that contacts both surfaces and a convex portion that protrudes into the recess portion, providing a dedicated sealing interface that mediates the connection and ensures coolant flow path sealability
2Reliability
If the sealing member includes a convex portion inserted to the recess portion, then the sealability is improved, but the assembly complexity increases
Solution Approach 1:
The sealing member is divided into functional portions: a base portion for contact with housing and stator frame, and a convex portion for insertion into the recess portion. This segmentation allows each portion to be optimized for its specific function while maintaining a relatively simple overall structure that does not significantly increase assembly complexity
Solution Approach 2:
The recess portion is pre-formed in the housing during manufacturing, and the sealing member is designed with a matching convex portion. This preliminary preparation of the recess structure allows the sealing member to be easily installed without requiring complex assembly operations or additional sealing steps
Data Source
AI summary
An object of the present invention is to provide a sealing member that provides high sealability in a coolant flow path. A rotating electrical machine includes a stator core around which a winding is wound, a stator frame that supports the stator core, a housing that is disposed outside the stator frame and forms a flow path space with the stator frame, and a sealing member that is disposed between the stator frame and the housing. The housing includes a mounting portion on which the sealing member is mounted. The sealing member includes a base portion that is in contact with the housing and the stator frame, and an attachment portion that protrudes from the base portion and is inserted to the mounting portion of the housing.