Self-aligning Valve Seal with Laterally Movable Poppet Member
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Poppet valves often experience misalignment between the sealing surface and the valve seat due to dimensional deviations, leading to fluid leakage, especially at high pressures, and inadequate sealing engagement, which can result in erosion and further leakage.
Innovation Solution
A laterally movable poppet sealing member that self-aligns with the valve seat as the poppet is axially moved from an open to a closed position, utilizing contoured surfaces for alignment and a radially extending sealing member with an inner diameter that allows lateral movement to ensure proper sealing engagement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dimensional deviations occur in conventional poppet valves, then manufacturing simplicity is maintained, but misalignment between sealing surface and valve seat occurs leading to fluid leakage
Solution Approach 1:
The sealing member is designed to be laterally movable on the poppet stem, allowing it to dynamically adjust its position to compensate for misalignment between the sealing surface and valve seat, thereby resolving the contradiction between manufacturing simplicity and sealing reliability
Solution Approach 2:
The laterally movable sealing member automatically self-aligns with the valve seat through its own movement capability, eliminating the need for high-precision manufacturing and external alignment mechanisms, thus improving sealing performance while maintaining manufacturing simplicity
2Reliability
If high pressure is applied to ensure sealing, then sealing force is improved, but erosion of sealing surfaces increases leading to further leakage
Solution Approach 1:
The laterally movable sealing member enables dynamic alignment adjustment that distributes sealing contact more evenly, reducing concentrated stress points that cause erosion while maintaining adequate sealing force under high pressure conditions
3Reliability
If conventional fixed sealing member is used, then device complexity is reduced, but sealing alignment cannot be adjusted leading to fluid leakage
Solution Approach 1:
The sealing member is designed with lateral movement capability on the poppet stem, adding minimal structural complexity while enabling automatic alignment adjustment to improve sealing reliability
Solution Approach 2:
The lateral position of the sealing member can be adjusted to change the alignment parameters between sealing surfaces, allowing adaptation to dimensional deviations without significantly increasing device complexity
Data Source
Figure 1
Figure 2~3
Figure 4A~4B
AI summary
A valve includes a valve body, a valve seat, and a poppet assembled with the valve body. The poppet includes an axially extending poppet stem and a radially extending poppet sealing surface. The poppet is axially movable between a closed position and an open position. The poppet sealing surface is defined by a sealing member disposed on the poppet stem. The sealing member is laterally movable on the poppet stem. When the poppet is moved from the open position to the closed position, the sealing member is laterally moved to align the sealing surface with the seating surface.