Brush Module Housing for Slip Ring Dust Containment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Brush dust from rotating electrical machines forms conductive creepage paths, leading to potential short circuits and malfunctions, as existing solutions either fail to effectively collect dust or are overly complex and expensive.
Innovation Solution
A brush module with a housing device and brush holder that incorporates a collecting device with ribs forming pockets in the direction of rotation to absorb and store brush dust, preventing its deposition and creating a dust-tight seal around the brushes and slip rings, and optionally using an air gap to further prevent creepage distances.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If brush dust is not collected, then the structure remains simple, but conductive creepage paths form causing short circuits and malfunctions
Solution Approach 1:
The housing device is segmented into functional zones: a first region containing the brush holder and a second region forming the collecting device. This segmentation allows the collecting device to be integrated into the housing structure without adding separate complex components, thus improving electrical reliability by preventing dust accumulation while maintaining structural simplicity.
Solution Approach 2:
The collecting device is merged with the housing device to form an integrated structure. The housing device simultaneously serves as both the structural enclosure and the dust collection system, eliminating the need for separate dust collection components and reducing overall device complexity while ensuring reliable dust containment.
2Reliability
If a separate collecting device is added, then brush dust is collected effectively, but the device complexity increases
Solution Approach 1:
The collecting device is merged with the housing device to form an integrated structure. The housing device simultaneously serves as both the structural enclosure and the dust collection system, eliminating the need for separate dust collection components and reducing overall device complexity while ensuring reliable dust containment.
3Reliability
If the housing device covers the shaft end completely, then dust containment is improved, but access and maintenance become difficult
Solution Approach 1:
The brush holder is extracted as a separate, movable component from the housing device. This allows the brush holder to be removed independently for maintenance and replacement without disassembling the entire housing device, maintaining complete dust containment when assembled while ensuring easy access for routine maintenance operations.
4Reliability
If pockets are formed by ribs in the housing device, then brush dust is collected in the direction of rotation, but manufacturing precision requirements increase
Solution Approach 1:
The housing device incorporates a porous separating wall that allows brush dust to be collected in the second region without requiring precisely formed rib structures. The porous material naturally filters and collects dust particles while being tolerant of manufacturing variations, reducing dust collection efficiency without increasing manufacturing precision requirements.
Data Source
Figure 1~3
Figure 4~5
AI summary
The invention relates to a brush module (10) for a rotating electrical machine, in particular current-excited synchronous machine, wherein the brush module (10) has at least two brushes (12) for the electrical contact connection of slip rings (11) of the machine, wherein the brush module (10) has a housing device (13) and brush holders (14) for receiving and holding the brushes (12), wherein the housing device (13) has a catch means (21) for receiving dust from the brushes (12). Alternatively, the housing device (13) is designed in such a manner that the brush holders (14) are spaced apart from one another, wherein the housing device (13) forms an air gap between the brush holders (14) at least in sections on a section of the housing device (13) that faces slip rings (11).