Stator Unit Sealing Agent for Motor Waterproofing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Motors used in communication base stations and household appliances, such as refrigerators, require higher waterproof standards, especially in environments exposed to outside air, where existing technologies fail to adequately prevent water intrusion and ensure reliable operation.
Innovation Solution
A stator unit design featuring a cylindrical bearing housing, a base member, a stator with a mold resin portion, and a sealing agent between the bearing housing, stator core, and insulator, which closes gaps to prevent water intrusion, combined with a labyrinth structure and strategically placed pockets with sealing agents to enhance waterproof performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a molding resin is used to cover the stator, then waterproof performance is improved, but gaps between components remain vulnerable to water intrusion
Solution Approach 1:
A sealing agent is introduced as an intermediary substance between the stator core, insulator, and bearing housing to fill and seal gaps. This sealing agent acts as a mediator that prevents water intrusion through the interfaces between components, complementing the molding resin coverage and achieving comprehensive waterproof performance.
2Reliability
If multiple sealing agents are placed in pockets, then waterproof performance is enhanced, but device complexity increases
Solution Approach 1:
The stator unit is segmented into multiple functional regions with dedicated pockets positioned at specific locations where water intrusion is most likely to occur. Each pocket contains a sealing agent that addresses localized sealing needs, allowing systematic waterproof protection without requiring complete redesign of the entire structure.
3Reliability
If the stator is fully covered with molding resin, then vibration-proof and soundproof performance is improved, but manufacturing complexity increases
Solution Approach 1:
Pockets containing sealing agents are pre-formed into the stator core or insulator before the molding resin is applied. This preliminary action ensures that sealing components are already in place and properly positioned, simplifying the subsequent molding process and avoiding the need for post-assembly sealing operations.
Data Source
AI summary
This stator unit includes a cylindrical bearing housing arranged to extend along a central axis extending in a vertical direction; a base member arranged to fix the bearing housing; a stator fixed to an outer circumferential surface of the bearing housing; and a mold resin portion arranged to cover the stator. The stator includes a stator core including a plurality of teeth arranged to project radially outward; an insulator arranged to cover a portion of a surface of the stator core; and a plurality of coils each of which is defined by a conducting wire wound around a separate one of the teeth with the insulator therebetween. A sealing agent is arranged between at least two of the outer circumferential surface of the bearing housing, the stator core, and the insulator.