Split Clamping Collar Seals for Roller Shaft Lubricant Retention
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Solution Overview
Problem
Existing machinery roller systems face challenges in maintaining effective seals against harsh environments and uneven loads, leading to potential leakage of lubricating fluids, particularly under conditions involving hard and abrasive materials.
Innovation Solution
The implementation of clamping collars with lower and upper sections, fastened together by fasteners to form static seals around the roller shaft ends, providing a robust metal-to-metal seal that inhibits fluid leakage and withstands various loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional sealing methods are used in roller assemblies, then the structure is simpler, but sealing effectiveness deteriorates under harsh conditions and uneven loads
Solution Approach 1:
The collar is divided into two separate sections (first collar section and second collar section) that are assembled together to form the complete sealing structure. This segmentation allows each section to be optimized for specific functions and facilitates easier installation and maintenance while maintaining effective sealing under harsh conditions
Solution Approach 2:
The sealing structure combines different materials with complementary properties: the collar sections use interference-fit metal components for structural integrity, while elastomeric seals provide the actual sealing interface. This composite approach leverages the strengths of each material to achieve reliable sealing under uneven loads and harsh environmental conditions
2Duration of action of stationary object
If robust design is implemented to withstand harsh environments, then service life is prolonged, but the risk of fluid leakage increases under extreme loads
Solution Approach 1:
The design incorporates elastomeric seals positioned between the metal collar sections and the roller shaft before exposure to harsh conditions. These seals act as a protective cushion that prevents fluid leakage even when the assembly is subjected to extreme uneven loads and abrasive materials, thereby maintaining service life without compromising sealing integrity
Solution Approach 2:
The interference fit between the collar sections and the roller shaft creates high contact pressure that maintains sealing effectiveness. The design utilizes the elastic deformation capability of the elastomeric seals to accommodate parameter variations under extreme loads, ensuring continuous sealing performance throughout the service life
3Reliability
If interference fit is used to secure collars, then sealing integrity is improved, but assembly and disassembly becomes more difficult
Solution Approach 1:
By dividing the collar into two separable sections, the design enables the assembly process to be performed in stages. The first collar section can be installed with interference fit to establish the primary seal, while the second collar section is then assembled to complete the sealing structure. This segmentation maintains sealing integrity while making the overall assembly process more manageable
Solution Approach 2:
The elastomeric seals serve as an intermediary element between the metal collar sections and the roller shaft. This intermediary allows for slightly less precise interference fit dimensions while maintaining effective sealing, thereby reducing assembly difficulty without compromising sealing integrity
Data Source
AI summary
A machine system includes a roller frame and a roller assembly mounted to the roller frame. The roller assembly includes first and second clamping collars positioned upon a roller shaft and each including a lower and an upper collar section. Fasteners clamp the lower and upper collar sections to the roller shaft to form static seals. The clamping collars may be formed with splitlines to enable the clamping collars to deform so as to simulate interference fits with the roller shaft.