Anti-loopback Flow Element Sealing Plugs for Motor Vehicle Machine Corrosion
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Solution Overview
Problem
The existing rotary electric machines suffer from corrosion of screws and traces due to salt bridges formed in corrosive environments, as the air flow anti-looping elements fail to effectively isolate these components from hot air recirculation and water retention, leading to accelerated corrosion.
Innovation Solution
Incorporating an anti-looping air flow element with blocking plugs to isolate screws and traces from corrosive environments, while maintaining mechanical and electrical connections, and using sealing studs to prevent recirculation of hot air and water ingress, thereby protecting the rectifier bridge components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If an air flow anti-looping element is used to prevent hot air recirculation, then cooling efficiency is improved, but corrosion of screws and traces occurs due to water retention and salt bridge formation
Solution Approach 1:
The air flow anti-looping element is divided into multiple functional zones: a first portion facing the bearing that allows water drainage, and a second portion facing the rectifier bridge that blocks water ingress. This segmentation enables different regions to perform specialized functions - cooling efficiency is maintained through the bearing-facing portion while corrosion resistance is protected at the electronics-facing portion through selective blocking and drainage capabilities
2Ease of manufacture
If screws and traces are exposed for mechanical and electrical connection, then ease of assembly is improved, but corrosion accelerates due to direct exposure to corrosive environments
Solution Approach 1:
The air flow anti-looping element is pre-configured with a first portion that facilitates water drainage away from connection areas and a second portion that blocks water ingress before it can reach screws and traces. This preliminary protective arrangement is built into the structure itself, allowing screws and traces to remain accessible for assembly while being proactively protected from corrosive environments through the element's inherent drainage and blocking geometry
Data Source
Figure 1~2
Figure 3~4
Figure 5a~5b
AI summary
The invention mainly relates to a rotating electrical machine (10), in particular for a motor vehicle, comprising: - a heat sink (58) having at least one receptacle, - an electric module positioned in the receptacle and comprising at least one connection terminal, - a connector (55) comprising at least one track (54) electrically connected to the connection terminal and a receptacle (84) for receiving a connecting means, in particular a head (83) of a screw (74), ensuring the mechanical and electrical connection between the track (54) of the connector (55) and the heat sink (58), and - an anti-loopback air flow element (93) inserted between a bearing (18) of the rotating electrical machine (10) and the connector (55), characterised in that the anti-loopback air flow element (93) comprises at least one sealing plug (101) for the receptacle (84) for the connecting means.