Piston Valve Core Structure With Flexible Base for Pressure Balance
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Solution Overview
Problem
Piston valve core structures experience unbalanced moments due to uneven pressure distribution, leading to increased energy consumption and potential leakage, especially under high flow rates, with existing designs failing to adequately address this issue.
Innovation Solution
A piston valve core structure combining a rigid ring surface and a flexible base surface, where the flexible base surface is made of a deformable material like polyurethane and features an ellipsoidal convex shape, and the rigid ring surface has a stepped cross-section, allowing the flexible base to absorb unbalanced forces through deformation and maintain sealing performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional piston valve core structure is used, then the structure is simple, but unbalanced pressure distribution creates unbalanced moment causing increased energy consumption and potential leakage
Solution Approach 1:
The patent introduces a flexible base surface made of elastomeric material that can deform under unbalanced pressure loads. This flexible surface absorbs the unbalanced moment by deforming elastically, preventing the valve core from rotating or binding, thereby reducing energy consumption while maintaining sealing performance.
Solution Approach 2:
The valve core structure combines rigid materials (for the valve core body and ring surface) with flexible elastomeric material (for the base surface). This composite construction allows the rigid portions to maintain structural integrity and sealing geometry while the flexible portion absorbs unbalanced forces, resolving the contradiction between simplicity and performance.
2Reliability
If a conventional piston valve core structure is used, then the design is simple, but unbalanced moment causes wall surface to squeeze against sealing position leading to leakage under high flow rates
Solution Approach 1:
The flexible base surface acts as a compliant element that deforms to absorb unbalanced moments, preventing the valve core from tilting or binding against the sealing surface. This simple addition of a flexible layer maintains the overall structural simplicity while dramatically improving sealing reliability under high flow conditions.
Solution Approach 2:
The patent changes the physical parameter of the base surface from rigid to flexible, allowing it to dynamically adapt to unbalanced pressure distributions. This parameter change enables the structure to self-adjust under varying flow conditions without adding complex mechanical components.
3Force
If flow channels are added to communicate inner cavity with valve inlet (as in CN108317298A), then unbalanced force on small valve core is reduced, but the valve core structure becomes more complicated and less universal
Solution Approach 1:
Instead of adding complex flow channels and communication passages, the patent uses a flexible base surface that passively absorbs unbalanced forces through elastic deformation. This approach is simpler, more universal, and applicable to various valve core designs without requiring modifications to internal flow paths.
Solution Approach 2:
The patent converts the harmful unbalanced moment into a beneficial elastic deformation of the flexible base surface. The unbalanced force that would normally cause binding or leakage is instead used to deform the flexible material, which absorbs the moment and protects the sealing interface.
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 combination of a rigid ring and flexible base surfaces effectively balances pressure distribution on the valve core, reducing energy consumption and preventing leakage by allowing the flexible base to deform under uneven pressures, while maintaining a simple and universal design suitable for most valve structures.
Implementation Method 1
the flexible base surface is made of a flexible material and is deformable when the bottom surface is subjected to an external force
Data Source
AI summary
Provided are a piston valve core structure with a combination of a rigid ring surface and a flexible base surface, and a method thereof. The structure includes a piston valve core, a flexible base surface, a rigid ring surface and a connecting member; a bottom surface of the piston valve core is planar; a top surface of the flexible base surface fits to the piston valve core, and a bottom surface thereof is a ellipsoidal convex surface; the rigid ring surface is a ring body with a stepped cross-section, and is coaxially arranged under the flexible base surface; a protruding height of the flexible base surface is greater than that of the rigid ring surface; the connecting member is configured to connect respective structures. The piston valve core structure can overcome unbalanced moment on the valve core, has a simple structure, and can be widely promoted and applied.