Pressure Balancing Valve Without Sliding Seals for Fast Switching
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Solution Overview
Problem
Existing fluid circuit devices, particularly those using inverse shuttle valves, face challenges in providing a suitable mechanical configuration for a wide variety of fluids and suffer from poor reliability due to sliding seals, limiting their widespread adoption for applications requiring high efficiency and fast switching actions under high pressure differentials.
Innovation Solution
A fluid circuit device with a pressure balancing valve that links at least two fluid volumes to a third volume, allowing fluid flow between the lower pressure volume and the third volume to maintain pressure equilibrium, which can be manufactured without sliding seals and is suitable for high-speed dynamic applications with tunable flow behavior and high pressure tolerance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inverse shuttle valves are used to balance pressure difference in hydraulic circuits, then pressure balancing function is achieved, but reliability deteriorates due to sliding seals
Solution Approach 1:
The patent extracts and removes the sliding seal component from the inverse shuttle valve design. The new valve uses a simple ball bearing or roller element that rotates on a fixed pin, eliminating the sliding seal entirely. This extraction of the problematic sliding seal component directly resolves the reliability issue while maintaining the pressure balancing function.
Solution Approach 2:
The patent replaces the sliding seal mechanical system with a rolling element mechanical system. Instead of using sliding seals that create friction and wear, the invention uses ball bearings or rollers that rotate on pins, substituting a high-friction sliding contact with a low-friction rolling contact system.
2Speed
If inverse shuttle valves with sliding seals are used, then pressure balancing is achieved, but operation speed deteriorates due to friction
Solution Approach 1:
The patent substitutes the sliding seal mechanical system with a rolling element system using ball bearings or rollers. This replacement reduces friction dramatically, enabling fast switching action while maintaining reliable operation under high pressure differentials. The rolling elements rotate freely on pins, allowing rapid valve response.
Solution Approach 2:
The patent changes the friction parameter by transitioning from sliding contact to rolling contact. This parameter change fundamentally improves both switching speed and reliability by reducing the coefficient of friction between moving parts, allowing the valve to respond quickly and reliably to pressure differential changes.
3Reliability
If precision sliding components are used in inverse shuttle valves, then sealing performance is improved, but manufacturing complexity increases
Solution Approach 1:
The patent extracts and eliminates the sliding seal component entirely from the design. By removing this complex precision component, the manufacturing process is simplified significantly. The replacement design uses standard ball bearings or rollers on pins, which are much easier to manufacture and assemble than precision sliding seals.
Solution Approach 2:
The patent replaces expensive precision sliding seal components with simpler, more economical rolling element components. Ball bearings and rollers are standard, readily available parts that are cheaper and easier to manufacture than custom precision sliding seals, while providing equivalent or superior performance.
4Reliability
If sliding seals are used in inverse shuttle valves, then pressure containment is achieved, but debris tolerance deteriorates
Solution Approach 1:
The patent extracts and removes the sliding seal component that is susceptible to debris interference. The new design using ball bearings or rollers on pins eliminates the sliding contact surface where debris could accumulate and cause failure, while maintaining effective pressure containment through the rolling element seal mechanism.
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 device minimizes vacuum pressure, provides tunable flow behavior, and is easy to manufacture with low tolerances, allowing for compact and flexible installation in dynamically moving components, while maintaining high pressure tolerance and debris tolerance, thus addressing the limitations of existing technologies.
Implementation Method 1
when there is a pressure difference between the at least one first fluid volume and the at least one second fluid volume, the at least one pressure balancing valve acts to provide a fluid flow path between the at least one third volume and the lower pressure of either the first fluid volume or the second fluid volume
Data Source
AI summary
Described herein is a fluid circuit device. The device incorporates at least one pressure balancing valve located between at least two fluid volumes that can be in a pressure differential arrangement wherein the at least one pressure balancing valve acts to address a pressure differential by opening a fluid volume or volumes to a third pressure equalising volume. In use, the fluid circuit device may in one embodiment be used in an energy absorbtion apparatus.