Arcuate Bearing Conductor Assembly for Raceway Current Protection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Bearings in electrical machinery are prone to damage due to electric current or charge passing through them, which existing grounding devices and insulative coatings fail to adequately prevent.
Innovation Solution
An electrically conductive assembly featuring an arcuate conductor with a gap angle of at least thirty degrees, coupled with conductive fibers and a retainer, provides a conductive path to divert electric charge away from the bearing raceways, preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a solid ring of conductive fibers is used to provide a grounding path, then current protection is improved, but device complexity and space requirements increase
Solution Approach 1:
The conductive assembly is segmented into discrete arcuate conductors spaced circumferentially around the shaft, with gaps between them. Each conductor is a separate element that can be independently positioned and secured, replacing the need for a continuous solid ring of fibers. This segmentation reduces complexity while maintaining protective function through multiple distributed grounding points.
Solution Approach 2:
The invention transitions from a two-dimensional planar arrangement of fibers to a three-dimensional arcuate configuration that wraps around the shaft in a circular pattern. The conductors are positioned at different angular positions around the circumference, creating a spatial distribution that provides comprehensive protection while requiring less material and occupying less space than a solid ring.
2Reliability
If insulative coatings are applied to prevent current flow, then bearing protection is improved, but manufacturing complexity increases
Solution Approach 1:
Instead of applying insulative coatings directly to the bearing surfaces, the invention introduces an intermediary conductive assembly that actively manages current flow. The arcuate conductors provide a controlled path for current to follow around the bearing, preventing it from passing through the raceways. This active intermediary approach is simpler to manufacture than precision insulative coatings while achieving the same protective effect.
3Adaptability or versatility
If a gap is introduced in the conductor for fluid flow, then adaptability is improved, but current protection effectiveness may worsen
Solution Approach 1:
The gap in each arcuate conductor is just one segment of the overall solution. Multiple conductors are spaced circumferentially around the shaft at different angular positions, creating multiple parallel current paths. The segmentation allows each conductor to be interrupted for fluid flow while the collective arrangement of multiple conductors maintains continuous circumferential protection.
Solution Approach 2:
The arcuate conductor design serves multiple functions simultaneously: it provides electrical grounding protection, allows fluid flow through the gap, and can be positioned to accommodate other system requirements. The universal design accommodates both electrical and fluid dynamics needs within a single component structure.
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
Effectively prevents electric current from flowing through the bearing raceways, thereby protecting the bearing from damage and allowing for fluid flow or clearance, making it suitable for installation in existing applications.
Implementation Method 1
An electrically conductive assembly features an arcuate conductor with a gap angle of at least thirty degrees, coupled with conductive fibers and a retainer, provides a conductive path to divert electric charge away from the bearing raceways
Data Source
AI summary
An electrically conductive assembly prevents current flow through the raceways of a bearing disposed about a shaft and an outer ring disposed and within a bore of an outer member. An arcuate conductor has a centerline, an inner radial end engageable with the shaft or a bearing inner ring, an outer radial end and two circumferential ends spaced circumferentially apart such that an arcuate gap is defined between the two ends when the conductor is installed about the shaft or the bearing inner ring. The two circumferential ends define a gap angle about the centerline, the gap angle having a value of at least thirty degrees. At least one conductive coupler is configured to attach the conductor to the outer member, another member or the bearing outer ring such that an electrically conductive path extends through the conductor and the at least one coupler.