Poppet Valve Sealing Layout for Misalignment-Tolerant Leak Tightness
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Solution Overview
Problem
Existing poppet valve designs face challenges in achieving sufficient sealing efficiency due to the need for precise alignment and guidance, particularly when the sealing surface is on the frontal side of the poppet, leading to issues with valve leak tightness.
Innovation Solution
A poppet valve device with a separately formed valve stem and poppet, where the sealing surface is positioned ahead of the valve stem along its closing direction, and both components are tiltable up to 5°, allowing for increased perpendicularity and positional tolerance while maintaining a tight seal, with a receptacle recess for force transfer and a magnetic actuator system for controlled movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the sealing surface is positioned on the frontal side of the poppet, then the valve can be actuated directly by the valve stem, but achieving sufficient sealing efficiency requires very precise alignment and guidance
Solution Approach 1:
The invention divides the poppet valve into separate components: the poppet body with sealing surface and the valve stem, allowing independent positioning and adjustment of each component to achieve proper alignment without requiring extremely precise manufacturing tolerances for the entire assembly
Solution Approach 2:
A guide element or guide surface is introduced as an intermediary between the valve stem and poppet sealing surface, providing alignment guidance that ensures the sealing surface passes before the front end of the valve stem, thereby reducing the precision requirements for direct actuation
2Reliability
If precise alignment and guidance are implemented to achieve sufficient sealing efficiency, then valve leak tightness improves, but device complexity and manufacturing cost increase
Solution Approach 1:
The invention allows for controlled misalignment by enabling the poppet to tilt relative to the valve stem within a defined angle range (up to 5 degrees), transforming the rigid alignment requirement into a dynamic tolerance that maintains sealing effectiveness without requiring complex guidance structures
Solution Approach 2:
The invention changes the geometric parameters of the sealing arrangement by positioning the sealing surface to pass before the front end of the valve stem along the closing direction, creating a configuration that is inherently more tolerant to misalignment while maintaining leak tightness
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
This design enhances valve leak tightness and stability, providing a secure fit and improved sealing efficiency even with some misalignment, while reducing manufacturing precision requirements and enhancing controllability.
Implementation Method 1
The valve stem is actuated directly or indirectly by an electromagnet/by a magnetic actuator system
Data Source
AI summary
A poppet valve device is proposed, comprising a valve stem, a poppet, having a sealing surface and being formed separately from the valve stem, wherein the poppet is actuatable via the valve stem, and wherein, following an imaginary line parallel to a longitudinal direction of the valve stem along the closing direction of the poppet, the sealing surface is passed before a front end of the valve stem is passed.