Pressure Balancing Valve Layout for High-Differential Fluid Circuits
Find Innovative SolutionsGenerate Solutions
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 applications, especially in scenarios requiring high efficiency and reliability, such as hydraulic cylinders with fast switching actions and 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 integrated into apparatuses experiencing working pressure variations, avoiding the need for sliding seals and allowing for high-speed dynamic applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If inverse shuttle valves are used to balance pressure difference in hydraulic circuits, then pressure equilibrium can be achieved, but the device complexity increases and reliability decreases due to requirements for sliding seals and precision components
Solution Approach 1:
The patent extracts and eliminates the sliding seal component from the pressure balancing valve design. By using a valveless approach with simple boreholes and chambers, the design removes the problematic sliding seal interface that caused reliability issues and high manufacturing tolerances in conventional inverse shuttle valves.
Solution Approach 2:
The piston is segmented into multiple chambers (first, second, and third chambers) with separate fluid volumes, allowing independent pressure control and balancing in each chamber. This segmentation enables the pressure balancing function to be achieved through chamber geometry rather than complex valve mechanisms.
2Reliability
If conventional pressure balancing valves with sliding seals are used, then pressure equilibrium can be maintained, but manufacturing precision requirements increase due to honed or fitted passages and precision sliding components
Solution Approach 1:
The patent removes the sliding seal and precision passage requirements entirely by using a valveless design. The pressure balancing is achieved through simple boreholes and chamber volumes that can be manufactured with standard tolerances, eliminating the need for honed or fitted passages.
Solution Approach 2:
The system uses the piston and chamber geometry itself to provide pressure balancing functionality, rather than requiring separate precision valve components. The boreholes and chambers automatically balance pressure through their volumetric relationships, making the system self-regulating without precision sliding components.
3Reliability
If inverse shuttle valves are used in hydraulic cylinders, then pressure difference can be addressed, but the switching speed decreases and high pressure differential tolerance is difficult to achieve
Solution Approach 1:
The patent eliminates the valve mechanism entirely, replacing it with direct fluid communication through boreholes. This removal of moving valve parts enables instantaneous pressure equalization and eliminates switching time, while the robust borehole design easily tolerates high pressure differentials.
4Reliability
If pressure balancing valves with sliding seals are used, then pressure equilibrium can be maintained, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts and removes the sliding seal and valve mechanism from the design, replacing them with simple boreholes and chambers. This dramatically simplifies the device while maintaining pressure equilibrium functionality through volumetric pressure balancing.
Solution Approach 2:
The patent merges the pressure balancing function directly into the piston and chamber structure itself, rather than using a separate valve mechanism. The boreholes and chambers are integrated into the piston assembly, eliminating the need for separate moving valve components and sliding seals.
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, is easy to manufacture, and has high pressure tolerance, making it suitable for high-speed dynamic applications and environments with debris, while avoiding the complexity of sliding seals.
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.