Sealed Conveyor Sprocket Bore for Hygienic Shaft Interfaces
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Solution Overview
Problem
Existing sprockets in endless conveyor belt systems are prone to contamination from dirt, bacteria, and liquids entering through the bore hole, compromising hygiene and creating a potential source of contamination.
Innovation Solution
A seal system comprising an annular seal cap and o-rings is implemented to seal the interface between the sprocket and drive shaft, using materials like stainless steel or PEEK, with tolerance rings and seal rings to ensure a secure and hygienic connection, preventing contamination from entering the sprocket bore.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional open sprocket design is used, then the structure is simple and easy to manufacture, but dirt, bacteria and liquids can enter the bore hole compromising hygiene
Solution Approach 1:
The seal system is divided into multiple functional components: seal caps that fit over the bore hole, O-rings for sealing, and retaining rings for secure mounting. This segmentation allows each component to perform its specific sealing function while maintaining overall system manageability and ease of assembly/disassembly
Solution Approach 2:
O-rings serve as intermediary sealing elements between the seal cap and the bore hole surface, creating a barrier that prevents contamination without requiring direct contact between rigid surfaces. This intermediary approach provides effective sealing while accommodating manufacturing tolerances
2Reliability
If a sealed interface is implemented, then hygiene is improved and contamination is prevented, but the assembly and disassembly process becomes more complex
Solution Approach 1:
The seal system is designed to be dynamically removable and re-installable. Seal caps can be detached from the bore hole when maintenance is required, and the O-rings are positioned to allow for repeated assembly cycles without compromising sealing effectiveness, enabling easy repair while maintaining hygiene during operation
Solution Approach 2:
O-rings are pre-installed in grooves within the seal caps before final assembly. This preliminary positioning ensures proper sealing alignment is achieved during assembly, reducing the skill level required for installation while maintaining reliable contamination protection
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 seal system effectively prevents dirt, bacteria, and liquids from entering the sprocket bore, enhancing hygiene and reducing contamination risks, ensuring a clean and reliable operation of the conveyor belt system.
Implementation Method 1
a seal system sealing an interface between the sprocket and the drive shaft. The seal system comprises a seal cap housing ring seals for sealing interfaces between the sprocket and seal cap and between the seal cap and drive shaft
Data Source
AI summary
A sealed sprocket for a conveyor belt comprises a sprocket mounted on a drive shaft and a seal system sealing an interface between the sprocket and the drive shaft. The seal system comprises a seal cap housing ring seals for sealing interfaces between the sprocket and seal cap and between the seal cap and drive shaft.