Check Valve Seat Segmentation for Vacuum Stress Reduction
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Solution Overview
Problem
Check valves in Venturi devices for producing vacuum face degradation and internal failure due to high stress from pressure differences, leading to reduced lifespan and performance across varying operating conditions.
Innovation Solution
The design incorporates improved bypass check valves with a modified seat configuration and sound attenuating members made from porous materials to reduce turbulence-generated noise and distribute seal member movement evenly, ensuring consistent sealing and extended valve lifespan.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the check valve operates under high pressure differences to generate vacuum, then the vacuum production capability is improved, but the stress on the sealing member increases causing degradation and reduced lifespan
Solution Approach 1:
The sealing member is divided into multiple sealing surfaces distributed around its circumference, each contacting corresponding valve seats. This segmentation distributes the high stress from pressure differences across multiple contact points rather than concentrating it on a single sealing surface, reducing wear and degradation at each individual contact point while maintaining effective sealing under high vacuum production conditions
Solution Approach 2:
The sealing member features localized sealing surfaces at specific circumferential positions that contact corresponding valve seats. This local quality approach concentrates sealing functionality at discrete locations where sealing is most critical, allowing the structure to withstand high pressure differences by distributing loads across these localized contact zones rather than requiring the entire sealing member to bear the full stress
2Reliability
If the sealing member contacts valve seats frequently to maintain sealing under varying pressure conditions, then the sealing consistency is improved, but the surface degradation and internal failure of the sealing member accelerates
Solution Approach 1:
Multiple sealing surfaces are distributed around the sealing member's circumference, allowing the valve to maintain sealing consistency through multiple discrete contact points with valve seats. This segmentation reduces the wear burden on each individual sealing surface by distributing the repeated contact stress across multiple locations, thereby extending the overall service life while maintaining reliable sealing under varying pressure conditions
3Stability of the object's composition
If the check valve responds quickly to pressure changes to maintain vacuum, then the vacuum stability is improved, but the stress cycles on the sealing member increase causing faster degradation
Solution Approach 1:
The sealing member incorporates multiple sealing surfaces arranged circumferentially, enabling quick response to pressure changes while maintaining vacuum stability. When pressure differential changes occur, multiple sealing surfaces can rapidly contact their corresponding valve seats simultaneously, providing immediate sealing restoration. This segmented approach allows fast response without concentrating stress cycles on a single sealing point, thereby protecting against fatigue-induced degradation
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 enhances the durability and performance of check valves by reducing noise and stress on seal members, ensuring consistent operation and extended lifespan under high-pressure conditions.
Implementation Method 1
sound attenuating members made from porous materials to reduce turbulence-generated noise
Implementation Method 2
check valves in a Venturi device for producing vacuum
Data Source
AI summary
Check valves, Venturi devices and engines having such check valves, define an internal cavity having a first port and a second port, a first seat and a second seat, and a translatable seal disk. The check valves have an outlet conduit extending from the second port and/or the first seat has a first annular seal bead and a second annular seal bead disposed radially inward of the first annular seal bead with a plurality of ribs extending between the first annular seal bead and the second annular seal bead within the fluid flow path of the first port. The outlet conduit defines an outlet passageway having a restrictor profile that is circular in a transverse profile, and the ribs decrease the flow area of the fluid flow path of the first port by about 10% to about 60%.