Rotary Valve Spacer Mechanism to Prevent Gasket Compression Set
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Solution Overview
Problem
Existing rotary valves in microfluidic devices face issues with gasket deformation and adhesion during storage, leading to operational inefficiencies and reduced lifespan due to compression set and adhesion to surfaces, which affects the valve's ability to maintain a fluid-tight seal.
Innovation Solution
The design incorporates a displaceable spacer that prevents the gasket from sealing against the rotor or stator during storage, ensuring the gasket remains uncompressed and avoids adhesion, allowing for a fluid-tight seal only when activated, thus enhancing the valve's pressure rating and operational longevity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the gasket is compressed against the rotor or stator during storage, then the valve maintains a fluid-tight seal, but the gasket deforms and adheres to the surfaces, reducing operational lifespan
Solution Approach 1:
The patent applies preliminary action by including a displaceable spacer that proactively prevents gasket compression during storage. The spacer is positioned to maintain separation between the rotor and stator before operation, preventing the harmful compression and adhesion effects from occurring in the first place. This preliminary protective measure extends the gasket's operational lifespan while ensuring the valve is ready for fluid-tight sealing when activated.
2Stability of the object's composition
If the gasket remains uncompressed during storage, then the gasket avoids deformation and adhesion, but the valve cannot maintain a fluid-tight seal
Solution Approach 1:
The patent applies dynamics by making the spacer displaceable rather than fixed. The spacer dynamically transitions between two states: in the storage state, it maintains separation to preserve gasket integrity; in the operational state, it is displaced (e.g., by rotor rotation or actuation) to allow the gasket to compress and form a fluid-tight seal. This dynamic behavior resolves the contradiction by adapting the system's configuration based on whether the valve is in storage or operation mode.
3Productivity
If the valve is activated for operation, then the gasket seals the rotor and stator together, but the gasket becomes susceptible to compression set and adhesion during subsequent storage
Solution Approach 1:
The patent applies preliminary anti-action by using the displaceable spacer to counteract the harmful effects of compression and adhesion after operation. Following valve use, the spacer is repositioned to maintain separation between the rotor and stator, preventing the gasket from adhering to surfaces or suffering compression set during storage. This preliminary protective action against future degradation ensures the gasket maintains its sealing performance for subsequent operations.
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 solution extends the operating and storage lifespan of rotary valves by preventing gasket deformation and adhesion, ensuring reliable fluid handling and maintaining a high-pressure rating throughout the device's operational life.
Implementation Method 1
a flexible material such as a gasket that is compressed for extended periods of time during storage or shipping may become deformed and/or can experience a loss in elasticity
Implementation Method 2
Further extended storage under compression can lead to adhesion of the flexible material to the compressing surface
Data Source
AI summary
Rotary valves and methods of using, manufacturing, and storing the same are provided herein. The rotary valve includes a rotor and a stator, biased toward one another to form a fluid tight seal. In some implementations, the rotor comprises an integrated flow channel containing a porous solid support. Frequently, the interface between rotor and stator is made fluid-tight using a gasket. Some implementations of the rotary valve include a displaceable spacer to prevent the gasket from sealing against at least one of the rotor and stator prior to operation, wherein when the spacer is displaced, the gasket seals the rotor and stator together in a fluid-tight manner.