Rotating Electrical Machine Integral Housing Sealing
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Solution Overview
Problem
Conventional rotating electrical machines have a large number of joining portions, which increases manufacturing complexity, cost, and physical size due to the need for high precision components and multiple seal members.
Innovation Solution
A rotating electrical machine design featuring an integrally formed housing with a cover member that covers the heat sink in a liquid-tight manner, reducing the number of high-precision components and sealing elements, and improving heat dissipation by mounting the stator and heat sink directly to the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple joining portions are formed around the motor case to maintain sealing, then sealing property is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The patent merges multiple separate components (motor case body, front frame end, rear frame end, control unit case) into an integrally formed housing. This single-piece housing structure eliminates the need for multiple joining portions and O-rings, thereby reducing manufacturing complexity while maintaining sealing integrity through the monolithic design.
2Reliability
If dimensional precision of components is increased to maintain sealing at multiple joining portions, then sealing property is improved, but manufacturing cost increases
Solution Approach 1:
By combining multiple precision-machined components into a single integrally formed housing, the patent eliminates the need for high-precision machining at multiple joining interfaces. The integral structure requires precision only at the single joining portion between the housing and cover member, significantly reducing manufacturing cost while maintaining adequate sealing.
3Reliability
If seal members such as O-rings are disposed at each joining portion, then sealing property is improved, but physical size increases
Solution Approach 1:
The patent eliminates multiple seal members by merging components into an integral housing structure. Only a single seal member is required at the one joining portion between the housing and cover member, thereby reducing the total volume occupied by sealing elements and minimizing the physical size increase.
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 simplifies manufacturing, reduces costs and size, while maintaining sealability and enhancing heat dissipation by allowing heat generated at the stator and control substrate to be dissipated through the housing.
Implementation Method 1
heat generated at the stator and the control substrate may be dissipated through the housing
Data Source
AI summary
A stator is fixed to a frame of an electric motor. A rotor is rotatably mounted to the frame to face the stator in a radial direction. A heat sink, to which a control substrate is attached, is mounted in an opening of the frame. A motor cover is attached to a front end of the frame to cover the heat sink. An adhesive groove, which has a fixed depth and is filled with an adhesive, is formed on the front end. A joining portion is formed on the rear end of the motor cover, and is inserted into the adhesive groove is an axis of rotation direction to join the motor cover with the frame in a liquid-tight manner.