Rolling Bearing Solid Film Coating for Dust Reduction
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Solution Overview
Problem
Rolling bearings in vacuum or corrosive environments without grease or oil face challenges in reducing dust particles and maintaining lubricity, especially in high-cleanliness environments.
Innovation Solution
A rolling bearing with components coated in a solid film of a fluorine compound containing 3-(trimethoxysilyl) propyl methacrylate, hexafluoropropene, and methyl methacrylate, with a lubricant like perfluoropolyether added dispersively, which forms a thin, adhesive, and flowable film to reduce dust generation and enhance lubrication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a coating of solid lubricant (soft metal, graphite, or molybdenum disulfide) is applied to bearing components, then lubrication is improved and the number of dust particles is reduced compared to grease or oil, but in high-cleanliness environments the coating itself generates dust particles that exceed acceptable limits
Solution Approach 1:
The patent applies a composite solid film coating composed of fluorocarbon resin (providing low friction and wear resistance) combined with specific additives including 3-(trimethoxysilyl) propyl methacrylate, hexafluoropropene, and methyl methacrylate. This composite structure maintains excellent lubrication performance while significantly reducing dust particle generation in high-cleanliness environments compared to conventional solid lubricant coatings.
Solution Approach 2:
The patent changes the chemical composition parameters of the solid film coating by incorporating specific fluorinated compounds and functional monomers. This parameter modification allows the coating to maintain lubricity through the fluorocarbon resin while the specific additive composition reduces dust particle generation, resolving the contradiction between lubrication performance and cleanliness requirements.
2Reliability
If grease or oil is used for lubrication in vacuum or corrosive environments, then lubrication performance is maintained, but the use of these lubricants is precluded in vacuum environments and they generate excessive dust particles in high-cleanliness environments
Solution Approach 1:
The patent replaces the conventional grease or oil lubrication system with a solid film coating system. This substitution eliminates the need for bulk lubricants that are incompatible with vacuum environments and excessive dust-generating materials, while maintaining effective lubrication through the engineered solid film composition that allows controlled solid lubricant peeling.
3Object-generated harmful factors
If a solid film coating is applied to reduce dust particle generation, then cleanliness is improved, but the coating must maintain adequate adhesion and lubrication performance under operating conditions
Solution Approach 1:
The patent creates a composite solid film where fluorocarbon resin provides the base matrix with low friction properties, while incorporated additives (3-(trimethoxysilyl) propyl methacrylate, hexafluoropropene, and methyl methacrylate) provide controlled peeling characteristics. This composite structure ensures the coating adheres sufficiently to prevent excessive dust generation while allowing controlled solid lubricant transfer to maintain lubrication performance.
Solution Approach 2:
The patent implements local quality by having different components within the solid film perform different functions: the fluorocarbon resin provides bulk lubrication properties, while the specific additives are distributed to provide controlled peeling at the interface. This localized functional differentiation allows the coating to simultaneously achieve good adhesion, reduced dust generation, and maintained lubrication performance.
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 significantly reduces dust particle generation and improves lubricity by forming a durable, adhesive solid film that allows the lubricant to flow and contribute effectively to the bearing's operation, extending the time before dust levels exceed acceptable limits.
Implementation Method 1
The solid film contains a lubricant dispersively added thereto and having no functional group
Implementation Method 2
forming a thin, adhesive, and flowable film
Data Source
AI summary
A method is provided that forms a solid film on a bearing component of a rolling bearing. A solution containing a fluorine compound and a lubricant having no functional group is allowed to adhere to the bearing component as a liquid film, the fluorine compound containing 3-(trimethoxysilyl) propyl methacrylate, hexafluoropropene, and methyl methacrylate as components. The solid film is formed on the at least one of the bearing components by hardening the adhering liquid film.