Oil Controlled Valve Spool for Rapid Hydraulic Switching
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Solution Overview
Problem
Hydraulic valves face challenges in quickly switching between on and off positions, especially when high flow rates and frequent flow changes are required, often hindered by air pockets and inadequate pressure in flow paths, making it difficult to keep flow paths primed.
Innovation Solution
A valve assembly with a spool configuration that allows for selective fluid communication and pressure management through multiple fluid ports, ensuring the flow paths remain primed for rapid switching, using a spool that reciprocates between positions to control fluid flow and pressure, preventing hydraulic lock and maintaining system readiness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the valve uses a conventional flow path design, then the structure is simple, but the valve cannot respond quickly between on and off positions during high rate of flow applications
Solution Approach 1:
The patent pre-pressurizes the flow paths before valve switching occurs by maintaining pressure through the inner compartment and multiple fluid ports. This preliminary pressurization ensures that when the valve switches between on and off positions, the flow paths are already primed and ready, eliminating delay caused by air pockets or inadequate pressure. The spool configuration with fluid receptacles and multiple ports (first through fourth fluid ports) creates redundant pressurization pathways that keep the system ready for rapid response.
2Reliability
If the valve increases flow path pressure to prevent air pockets, then the flow paths remain primed, but the risk of hydraulic lock increases
Solution Approach 1:
The patent divides the flow path into multiple segmented sections using the spool with separate fluid receptacles (first fluid receptacle and second fluid receptacle) and multiple fluid ports. Each receptacle and port combination creates an independent pressure zone. This segmentation allows pressure to be distributed across multiple zones rather than concentrated in a single path, maintaining priming reliability while reducing the risk of complete hydraulic lock. The inner compartment acts as a buffer zone that can accommodate pressure variations without causing system-wide hydraulic lock.
3Productivity
If the valve uses a single flow path, then the structure is simple, but frequent switching between on and off positions causes air pockets and inadequate pressure
Solution Approach 1:
The patent introduces an inner compartment as an intermediary element between the external fluid sources and the main flow paths. This inner compartment serves as a buffer and pressure equalization chamber that mediates between frequent valve switching and flow path priming. The multiple fluid ports (first, second, third, and fourth fluid ports) connected to the inner compartment create alternative pathways that maintain pressure during frequent switching, preventing air pocket formation without requiring structural complexity in the main flow paths.
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
Enables quick and reliable transitions between on and off positions even at high flow rates, preventing hydraulic lock and keeping the system primed, ensuring efficient operation in applications requiring frequent flow changes.
Implementation Method 1
A second fluid receptacle is configured to receive fluid pressure from the fourth fluid port
Implementation Method 2
preventing hydraulic lock and keeping the system primed
Data Source
AI summary
A valve body comprises an inner compartment extending along a longitudinal axis from a second end portion towards a first end portion. First, second, and third fluid ports in to the valve body are perpendicular to the longitudinal axis. The second fluid port is between the third and the first fluid port. A fourth fluid port is parallel to the longitudinal axis. A spool is configured to selectively reciprocate in the inner compartment. The spool comprises a first fluid receptacle configured to block fluid flow to the third fluid port and to fluidly communicate with the second fluid port when the spool adjoins the first end portion. The first fluid receptacle is configured to fluidly communicate with the second fluid port and with the third fluid port when the spool adjoins the second end portion. A second fluid receptacle is configured to receive fluid pressure from the fourth fluid port.