Self-Adjusting Valve Seat Seal for Precise Flow Modulation
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Solution Overview
Problem
Conventional fluid control systems face challenges with complex mechanisms, lack of precision control, and increased volume, particularly in achieving minimal pressure drop at a given flow rate, and inadequate control over bypass flow in the closed position.
Innovation Solution
A valve assembly with a valve seat and seal made from a polymeric material that self-adjusts its inner radial diameter to maintain contact with the valve element across a range of positions, ensuring precise flow control and minimizing bypass flow, while being compact and suitable for a wide temperature range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional valve mechanisms are used, then flow control function is achieved, but device complexity increases and precision control is lacking
Solution Approach 1:
The valve assembly is divided into distinct functional components: a valve body, a separate valve seat with integrated seal, and a valve element. This segmentation allows each component to be optimized independently for its specific function while simplifying the overall mechanism compared to integrated conventional designs.
Solution Approach 2:
The valve element is designed to move dynamically between a closed position (sealing against the valve seat) and an open position (allowing fluid flow). This dynamic movement capability enables precise flow control modulation without requiring complex multi-component mechanisms.
2Volume of moving object
If valve size is reduced for compact design, then packaging concerns are addressed, but pressure drop control becomes more difficult
Solution Approach 1:
The valve seat is nested within the valve body, and the valve element moves within the space defined by the valve body and seat. This nested arrangement maximizes the functional flow path within a compact volume, maintaining low pressure drop characteristics while achieving a space-efficient design suitable for packaging-constrained applications.
3Manufacturing precision
If valve is designed for precise flow control, then modulation capability is improved, but bypass flow control in closed position becomes inadequate
Solution Approach 1:
The seal is merged with the valve seat to form an integrated sealing assembly. This combination ensures that when the valve element closes against the valve seat, the integrated seal provides reliable bypass flow control, eliminating leakage paths that would exist with separate sealing components.
4Reliability
If polymeric material is used for valve seat, then sealing capability is improved, but dimensional stability at extreme temperatures may be compromised
Solution Approach 1:
The valve seat is designed with parameters (radial diameter, seal contact surface area) that can change in response to temperature variations. This parameter adaptability allows the polymeric material to maintain effective sealing contact across a wide temperature range from -40°C to 66°C, compensating for thermal expansion or contraction through controlled dimensional changes.
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 solution provides high precision control of fluid flow, reduces pressure drop, and maintains sealing capabilities over a wide temperature range, making it suitable for various applications with lower supply pressures and compact designs.
Implementation Method 1
the cylindrical body portion is formed from a polymeric material which maintains dimensional stability at temperatures ranging from - 40°C to 66°C and which is configured to self-adjust the inner radial diameter to correspond to the outer radial diameter of the valve element
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
A valve assembly (110) includes a valve body (122) defining a fluid inlet (114) in fluid communication with a fluid outlet (116). The valve body (122) has an inner body surface defining an interior chamber (130) extending between the fluid inlet (114) and the fluid outlet (116). A valve element (118) is disposed within the interior chamber (130) and rotatable through a range of positions relative to the outlet providing a high level of precision control of a fluid flow rate through the valve assembly (110). A valve seat (210) with a seal is positioned around the valve element (118). The valve seat (210) is configured to self-adjust its inner radial diameter to correspond to the outer radial diameter of the valve element (118) to maintain a portion of an inner seat surface in contact with an outer valve surface of the valve element (118) through the range of positions.