Keyed Shuttle Valve Structure for Flow and Sealing Stability
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Solution Overview
Problem
Shuttle valves in pneumatic and hydraulic systems face issues with maintaining high flow rates and preventing leakage due to movable element deterioration and misalignment, which can cause blockages and fluid backflow between inlet ports.
Innovation Solution
A shuttle valve design featuring a valve body with radial protrusions and a key that maintains the shuttle's orientation, preventing rotation and ensuring consistent sealing between inlet ports, allowing high flow rates while reducing the likelihood of leakage and preventing the movable element from exiting under pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a movable element is used to block inlet ports, then fluid flow control is achieved, but the movable element deteriorates over time causing leakage
Solution Approach 1:
The patent removes the movable element from the system entirely, replacing it with a fixed valve body that has pre-formed flow paths. This extraction eliminates the deterioration problem while maintaining flow control functionality through the fixed internal geometry of the valve body.
Solution Approach 2:
Instead of using a movable element to actively block ports, the invention inverts the approach by using a fixed structure with pre-defined flow paths that passively direct fluid. The flow control is achieved through the fixed internal geometry rather than active movement, reversing the traditional mechanism.
2Productivity
If a movable element cycles between inlet ports, then fluid direction control is achieved, but partial blockage occurs reducing flow rate
Solution Approach 1:
By removing the movable element that causes partial blockage during cycling, the patent eliminates the flow rate reduction issue. The fixed valve body provides unobstructed flow paths that maintain high productivity without the inefficiencies of movable element interference.
3Adaptability or versatility
If the shuttle rotates during movement, then positioning flexibility is improved, but sealing consistency deteriorates
Solution Approach 1:
The patent eliminates the rotation problem by removing the movable shuttle element entirely. The fixed valve body provides consistent sealing through its pre-formed flow paths, eliminating the variability introduced by rotational movement while maintaining adaptability through fixed port configuration.
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 design enhances fluid flow rates and reduces leakage by maintaining the shuttle's orientation and preventing rotation, ensuring effective sealing and preventing the movable element from exiting under pressure, thus addressing the issues of blockages and fluid backflow.
Implementation Method 1
a key that protrudes radially inward within the longitudinal cylindrical bore... the key of the valve body is interposed between two radial protrusions of the plurality of radial protrusions
Implementation Method 2
When pressure from a fluid is exerted through a particular inlet, it pushes the movable element towards the opposite inlet
Data Source
AI summary
An example shuttle valve includes: (i) a valve body comprising a longitudinal cylindrical bore, a first inlet port, a second inlet port, an outlet port, and a key that protrudes radially inward within the longitudinal cylindrical bore; and (ii) a shuttle mounted in the longitudinal cylindrical bore and configured to move axially therein, wherein the shuttle comprises a plurality of radial protrusions that protrude radially outward from, and are circumferentially spaced apart about, a peripheral surface of the shuttle, and wherein the key of the valve body is interposed between two radial protrusions of the plurality of radial protrusions.