Carbon Nanotube Lubricant Composition for Electric Discharge Suppression
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Solution Overview
Problem
Lubricated surfaces in bearings are prone to electrolytic corrosion due to electric discharge, which existing conductive greases fail to adequately prevent.
Innovation Solution
A lubricant composition comprising carbon nanotubes with specific diameters and dispersants, formulated with base oils and optional thickeners, to suppress electric discharge and maintain electrolytic corrosion prevention over time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If carbon nanotube content is increased to improve conductivity, then electrical resistance decreases, but consistency control becomes difficult
Solution Approach 1:
The patent optimizes the content parameter of carbon nanotubes to a specific range of 0.001 to 0.08% by mass, which is sufficient to achieve the desired electrical resistance reduction while maintaining proper grease consistency. This precise parameter control avoids the complexity of managing excessive additive concentrations.
2Reliability
If dispersant is added to maintain carbon nanotube dispersion, then electric discharge suppression is improved, but composition complexity increases
Solution Approach 1:
The patent introduces dispersant as an intermediary substance that facilitates uniform distribution of carbon nanotubes in the base oil. This mediator prevents aggregation of carbon nanotubes, ensuring stable electric discharge suppression performance without requiring complex formulation adjustments.
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 composition effectively suppresses electric discharge, preventing electrolytic corrosion while maintaining acoustic performance and consistency, with dispersants extending the effectiveness of carbon nanotubes.
Implementation Method 1
the lubricant composition comprises carbon nanotubes having an electric discharge suppressing effect, so that electric discharge of the lubricant composition can be suppressed to prevent an electrolytic corrosion on lubricated surfaces
Implementation Method 2
The composition of the present invention comprising a dispersant makes it possible to maintain the electric discharge suppressing effect of the carbon nanotubes for a longer period of time
Data Source
AI summary
A lubricant composition comprises a base oil and at least one of carbon nanotubes with a diameter of 0.4 to 9.0 nm in an amount of 0.001 to 0.08% by mass relative to a total mass of the composition, and the composition has a consistency of 200 to 440.