Elastic Check Valve Sealing via Frame Compression
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Solution Overview
Problem
Existing check valves require high accuracy machining to ensure reliable closure of fluid paths, which is challenging and costly to achieve.
Innovation Solution
A check valve design featuring an outer frame, a sealing part, and a coupling part formed from elastic bodies, where the outer frame is compressed to elastically deform and displace the sealing part, ensuring fluid path closure without the need for precise machining, using a configuration where the outer frame is thicker than the interplane dimension and the coupling part is thinner, allowing uniform deformation and stable sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the projection of the valve body is configured to make line contact with the entire circumference of the ridge line on the edge of the fluid path, then the degree of sealing of the fluid path is enhanced, but high accuracy machining is required for both the valve body and the receiving member
Solution Approach 1:
The invention changes the contact geometry from line contact to point contact between the valve body projection and the receiving member ridge line. This parameter change in contact type maintains sealing reliability while significantly reducing the machining accuracy requirements, as point contact is less sensitive to dimensional variations than line contact along the entire circumference.
Solution Approach 2:
The invention applies local quality by concentrating the sealing function at a specific point (the projection tip contacting the ridge line) rather than distributing it along the entire circumference. This localized sealing approach maintains effective sealing while reducing the overall machining precision requirements for the components.
2Reliability
If high accuracy machining is performed on the valve body and receiving member to ensure reliable fluid path closure, then the sealing performance is improved, but the manufacturing complexity and cost increase
Solution Approach 1:
The invention changes the geometric parameters of the sealing interface, specifically transitioning from a line contact configuration to a point contact configuration. This parameter change reduces the sensitivity to machining variations, thereby simplifying manufacturing processes and reducing costs while maintaining reliable fluid path closure.
Solution Approach 2:
The invention employs simpler, less precisely machined components that can be manufactured more economically. By reducing the machining accuracy requirements through the point contact design, the valve body and receiving member can be produced with standard tolerances, lowering manufacturing complexity and cost.
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 design reliably closes fluid paths without requiring high accuracy machining, ensuring stable and efficient fluid control while reducing manufacturing complexity and costs.
Implementation Method 1
the outer frame, the sealing part, and the coupling part are formed from elastic bodies, and when the pair of members are joined together, the sealing part is displaced toward one side in the thickness direction by elastic compressive deformation in the thickness direction of the outer frame clamped by the clamping surfaces of the pair of members
Data Source
AI summary
Disclosed is a check valve reliably closing a fluid path without the need of machining with high accuracy. The check valve includes a pair of members with clamping surfaces; and a valve body clamped by the clamping surfaces from both sides in a thickness direction of the valve body. The valve body is formed from an elastic body and includes an outer frame, a sealing part arranged inside the outer frame and configured to open and close a fluid path formed in one of the pair of members, and a coupling part configured to allow fluid to pass therethrough in the thickness direction and configured to couple the outer frame and the sealing part to each other. The outer frame has a thickness larger than an interplane dimension between the clamping surfaces when the pair of members are joined together.