Flexible Insulating Liner for Electrically Isolating Bearings
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Solution Overview
Problem
Known bearings made of metal conduct electricity, and existing non-conductive bearings using ceramic balls are expensive and have drawbacks, necessitating a cost-effective solution for electrically isolating metal bearings.
Innovation Solution
An electrically isolated bearing assembly with metal races and roller elements, utilizing an elongated flexible insulating strip made of non-conductive polymer material to prevent electrical conduction, which is cut to length and flexed to fit around bearing races, forming a U-shaped channel to isolate the bearing from the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If ceramic balls are used to provide electrical insulation, then electrical non-conductivity is achieved, but cost increases and other drawbacks occur
Solution Approach 1:
An insulating member is introduced as an intermediary component between the bearing and the housing. This insulating member comprises a flexible insulating strip that forms a channel receiving the bearing race, with segmented leg structures providing electrical isolation while allowing metal bearing components to be used, thereby resolving the contradiction between achieving electrical non-conductivity and maintaining cost-effectiveness.
2Reliability
If a rigid insulating structure is used, then electrical isolation is provided, but adaptability to different bearing sizes and configurations is reduced
Solution Approach 1:
The insulating strip is designed with flexible characteristics and segmented leg structures that can flex relative to the base portion. This dynamic design allows the insulating member to adapt to different bearing sizes and configurations while maintaining electrical isolation, resolving the contradiction between providing reliable electrical isolation and achieving adaptability to various bearing arrangements.
Solution Approach 2:
The insulating member is divided into a base portion and multiple segmented leg structures. These segmented legs can flex independently and adapt to the specific geometry of the bearing race, providing both electrical isolation and adaptability to different bearing configurations.
3Ease of manufacture
If metal races and roller elements are used, then cost-effectiveness is maintained, but electrical conduction occurs between inner and outer races
Solution Approach 1:
The insulating member acts as a mediator between the metal bearing components and the housing, blocking the electrical conduction path while allowing the cost-effective metal races and roller elements to be used. The segmented leg structures of the insulating member prevent electrical contact between the inner and outer races through the bearing.
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
The solution effectively prevents electrical conduction between the bearing and housing, offering a cost-effective and flexible insulation method suitable for various applications, including CT scanning machines, without the expense of ceramic components.
Implementation Method 1
The insulating member or strip comprises polymer or other suitable electrically non-conductive material to thereby prevent formation of an electrical path through the roller elements
Data Source
AI summary
A flexible insulating liner strip or member comprises an elongated flexible structure that can be cut to length and positioned between a race of a bearing and a bearing housing to electrically insulate the bearing race from the bearing housing and/or other components. The flexible insulating liner strip may be segmented to provide flexibility, and one or more portions of the flexible insulating liner strip may be curved to accommodate variations in the dimensions of bearing housings and races. The flexible insulating liner strip provides a cost-effective way to electrically insulate bearings.