Internal bypass grounding brush assembly with axial brushes
The grounding brush assembly with radially extending conductive fibers diverts electrical currents from the rotating shaft to the stationary shaft, preventing damage to bearings by establishing an efficient conductive path, thus reducing friction and wear.
FR3166762A1Pending Publication Date: 2026-03-27AB SKF SKF PATENT DEPARTMENT
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Patent Information
- Application Number
- FR2025006129
- Authority / Receiving Office
- FR · FR
- Patent Type
- Applications
- Current Assignee / Owner
- Priority Date
- 2024-07-11
- Filing Date
- 2025-06-06
- Publication Date
- 2026-03-27
AI Technical Summary
Technical Problem
Electrical currents accumulating on rotating shafts in bearings of electrical machines can cause damage to the raceways and rolling elements, necessitating effective diversion of these currents to prevent such damage.
Method used
A grounding brush assembly with conductive fibers extending radially outward from a conductive base element, aligned coaxially with the shaft, provides a conductive path from the rotating shaft to a stationary shaft, diverting electrical currents away from the bearings.
Benefits of technology
The assembly effectively prevents damage to bearings by ensuring electrical charges flow through the conductive path to the stationary shaft, reducing friction and wear on the conductive fibers and maintaining the integrity of the bearing components.
✦ Generated by Eureka AI based on patent content.
Abstract
Internally bypassed grounding brush assembly with axial brushes. Grounding brush assembly for an electrical machine, comprising a rotating shaft with a bore, an outer housing, one or more bearings rotatingally coupling the shaft to the housing, and a fixed shaft extending through the bore of the rotating shaft and electrically grounded. A conductive base element has a bore dimensioned to receive a portion of the fixed shaft, a centerline, and an outer circumferential surface. One or more conductive brushes are coupled to the base element and comprise conductive fibers extending radially outward from the outer surface of the base element and axially along the centerline.Each conductive fiber has an inner radial end coupled to the base element and an outer radial end that can interact with the inner circumferential surface of the rotating shaft such that at least one conductive path extends from the rotating shaft, through the brush and the base element, and to the stationary shaft. Reference: Figure 1.
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