Annular Groove Valve Geometry for Collision-Free Closing Flow
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Solution Overview
Problem
Existing valve devices with annular grooves and check valves face issues where the valve main body may collide with the inner peripheral wall during closing, leading to potential damage and increased pressure loss due to the reduction in diameter at the valve opening time, which can result in reduced flow rates.
Innovation Solution
The valve device incorporates a specific shape surface within the annular groove that progressively reduces in diameter, guiding the outer peripheral wall of the valve main body during closure, preventing collision with the inner peripheral wall and maintaining flow efficiency by avoiding increased spring constants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the diameter of the tubular member is reduced at the valve opening time to improve sealing, then the flow rate decreases and pressure loss increases
Solution Approach 1:
The annular groove is designed with a curved specific shape surface instead of a straight cylindrical form. The groove radius R1 at the bottom surface side is larger than the groove radius R2 at the inner peripheral wall side, creating a tapered curved profile. This curvature allows the valve main body to follow a guided closing path that maintains better sealing contact without requiring excessive diameter reduction, thereby preserving flow rate while improving sealing reliability.
2Reliability
If the spring constant is increased to prevent valve collision, then the valve closing force increases but pressure loss increases and flow efficiency decreases
Solution Approach 1:
The specific shape surface of the annular groove is designed to guide the valve main body's outer peripheral wall during its closing movement. The tapered curved profile (with groove radius R1 > groove radius R2)预先 establishes a controlled closing path that prevents the valve from colliding with the inner peripheral wall. This preliminary guidance eliminates the need for excessive spring force, allowing the use of a softer spring that reduces pressure loss while still preventing collision.
3Ease of manufacture
If a perpendicular side peripheral surface is used in the annular groove, then manufacturing is simplified but the valve main body may collide with the inner peripheral wall during closure
Solution Approach 1:
Instead of using a perpendicular side peripheral surface that is easy to manufacture but causes collision, the patent employs a curved specific shape surface with tapered geometry. The groove radius transitions from R1 at the bottom surface to R2 at the inner peripheral wall, creating a guided closing path for the valve main body. This curved profile prevents collision by directing the valve along a controlled trajectory, accepting slightly increased manufacturing complexity for significant reliability improvement.
Data Source
AI summary
An annular groove has: a side peripheral surface that is shaped in a ring form and is formed such that the side peripheral surface inwardly extends from a bottom surface of the annular groove in a radial direction of a tubular member and is joined to an inner peripheral wall of the tubular member; and a specific shape surface that is formed along at least a part of the side peripheral surface between a bottom surface side end part and an inner peripheral wall side end part of the side peripheral surface such that a diameter of the specific shape surface is progressively reduced in an axial direction of the tubular member from one axial side, at which the bottom surface is placed, toward another axial side, at which the inner peripheral wall is placed.