Counter-Balanced Pressure Relief Valve for Faster Spike Response
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Solution Overview
Problem
Direct acting pressure relief valves in hydraulic systems have slow reaction times due to large poppets and heavy springs, which can lead to mechanical failures, and pilot operated valves, while faster, are complex and costly.
Innovation Solution
A modified direct acting pressure relief valve with a counter-balanced poppet and spring configuration, featuring a housing with a ledge and holes that allow the poppet to be biased downward by a spring, enabling quicker pressure release through a combination of upper and lower portion holes when threshold pressure is reached.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If direct acting pressure relief valves use large poppets and heavy springs to counter hydraulic pressure, then the valve can handle system pressure, but the reaction time becomes slow
Solution Approach 1:
The patent introduces a counter-balanced poppet design where the poppet is balanced against the spring force and system pressure. The counter-balancing mechanism allows the poppet to respond more quickly to pressure changes by reducing the net force that must be overcome during operation, thereby decreasing reaction time while maintaining adequate spring force for pressure control.
2Loss of time
If pilot operated pressure relief valves are used to achieve faster response time, then reaction time improves, but device complexity and cost increase
Solution Approach 1:
The patent combines the direct acting simplicity with pilot operated speed by integrating a pilot mechanism within the direct acting valve structure. The pilot port and main valve are merged into a single integrated design, allowing the valve to achieve fast response times through pilot operation while avoiding the complexity of separate pilot valve assemblies and multiple independent components.
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 solution significantly reduces reaction time to relieve pressure spikes, making it comparable to pilot operated valves without the need for complex designs or high costs, while maintaining a metal-to-metal seal and adjustable spring tension for precise pressure control.
Implementation Method 1
a spring disposed within the bore at the upper portion of the housing and biasing the poppet downwards so that the shoulder abuts the ledge
Implementation Method 2
a threshold pressure exerted against the shoulder through the at least one lower portion hole urges the poppet upwards
Implementation Method 3
urges the poppet upwards against the bias of the spring so that pressure is released through the at least one upper portion hole
Data Source
AI summary
A pressure relief valve includes a housing, a poppet, and a spring. The housing includes an internal bore defined along a longitudinal axis of the housing and extending from an upper portion to a lower portion. A ledge or seat is defined within the bore. At least one lower portion hole is defined from an outer surface of the lower portion and into the bore. At least one upper portion hole is defined from an outer surface of the upper portion and into the bore. The poppet is slidably engaged within the internal bore. The poppet includes a head, a shaft, and an internal channel that runs longitudinally through the entire poppet. The head includes a shoulder. The spring is disposed within the bore at the upper portion of the housing and biases the poppet downwards so that the shoulder abuts the ledge or seat.