Rotating Electric Machine Dual Direction Sealing
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Solution Overview
Problem
Conventional rotating electric machines face challenges in maintaining a dust-proof and water-proof structure for the controller section, as existing sealing configurations are prone to damage from assembly stress and twisting forces, leading to potential malfunctions and rust issues.
Innovation Solution
The design incorporates a dual sealing system with annular sealing members compressed in different directions to prevent even stress distribution, combined with a cylindrical cover that extends to cover both the motor and controller sections, ensuring air-tight and water-tight sealing without compromising the sealing structure during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single sealing member is used at the joint between cover and connector, then the structure is simple, but the sealing is vulnerable to assembly stress and twisting forces
Solution Approach 1:
The sealing structure is divided into multiple independent sealing members positioned at different locations and oriented at different angles. This segmentation allows each sealing member to independently resist different types of stress, preventing a single point of failure while maintaining overall structural simplicity.
2Reliability
If two sealing members are compressed in the same direction, then the sealing coverage is comprehensive, but the assembly error and stress affect all sealing structures uniformly
Solution Approach 1:
The sealing members are arranged with asymmetric orientations relative to the assembly direction. By positioning sealing members at different angles and locations, the structure becomes less sensitive to uniform assembly errors, as the asymmetric distribution ensures that no single sealing member bears the full brunt of assembly misalignment.
3Ease of operation
If the controller section is positioned outside the stator in the axial direction, then the motor and controller are separated, but the sealing requirements increase
Solution Approach 1:
The cover serves multiple functions: it protects the controller section, provides structural support, and integrates multiple sealing members to create comprehensive dust-proof and water-proof protection. This multi-functionality reduces the need for additional separate sealing components, maintaining simplicity while meeting enhanced sealing requirements.
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 configuration effectively prevents dust and water intrusion into the controller section, maintaining a dust-proof and water-proof character while avoiding assembly-related damage to the sealing structures, thus enhancing the reliability and longevity of the rotating electric machine.
Implementation Method 1
a first sealing member and a second sealing member which are respectively compressed in different directions
Data Source
AI summary
A rotating electric machine includes a cover formed in a cylindrical shape and extending in an axial direction to cover the controller section, a lid section disposed inside of the cover body to seal the cover body, a first sealing member compressed between the lid section and the cover, and a second sealing member compressed in a different direction than the first sealing member between the cover and the first frame or the second frame. The rotating electric machine also includes a tab formed on an outer periphery of the first frame or the second frame, and a claw extending from the one end of the cover body and engageable with the tab to hold the sealing members in a compressed state. As a result, the rotating electric machine is sealed from dust and water.