Pressure Relief Valve Damping for Stable Gas Pressure Response
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Solution Overview
Problem
Existing pressure relief valves in fluid systems experience instabilities due to sudden changes in gas pressure, which can lead to unpredictable valve operation and inefficiencies in pressure regulation.
Innovation Solution
A pressure relief valve design incorporating a poppet valve and a fluid damper, where the damper chamber is axially positioned between the valve housing and the poppet valve head, and a channel fluidly couples the damper chamber with the flowpath, allowing the damper to draw gas into the chamber during opening and expel it during closing, thereby stabilizing the valve movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a conventional pressure relief valve is used, then the valve structure is simple, but the valve experiences instabilities due to sudden changes in gas pressure
Solution Approach 1:
A damper chamber is introduced as an intermediary component between the poppet valve and the gas source. The damper chamber absorbs sudden pressure changes by allowing gas to expand into or compress within the chamber, thereby stabilizing the pressure acting on the poppet valve and eliminating valve instabilities without requiring complex control systems
Solution Approach 2:
The damper chamber provides beforehand cushioning by pre-absorbing pressure fluctuations before they reach the poppet valve. This cushioning effect protects the valve from sudden pressure changes, ensuring stable operation while maintaining a relatively simple overall structure
2Stability of the object's composition
If the damper chamber volume is increased to improve damping effect, then the stability improves, but the device size increases
Solution Approach 1:
The damping characteristics are optimized by adjusting parameters such as the damper chamber volume, the cross-sectional area of the communication channel, and the gas flow resistance within the channel. These parameter changes allow tuning of the damping effect to achieve stable pressure regulation with a compact valve assembly volume
3Stability of the object's composition
If the communication channel is restricted to improve damping response, then the pressure stability improves, but the gas flow rate through the valve decreases
Solution Approach 1:
The communication channel between the damper chamber and the valve is designed to provide dynamic response. The channel allows sufficient gas flow during normal operation while the damper chamber's compressibility provides automatic adjustment during pressure fluctuations, achieving both pressure stability and adequate gas flow rate without requiring complex active control
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 fluid damper reduces or eliminates valve instabilities by providing a damping effect that opposes sudden changes in pressure, ensuring smoother operation and more stable pressure regulation.
Implementation Method 1
the damper chamber is axially positioned between the valve housing and the poppet valve head, and a channel fluidly couples the damper chamber with the flowpath, allowing the damper to draw gas into the chamber during opening and expel it during closing
Implementation Method 2
The fluid damper reduces or eliminates valve instabilities by providing a damping effect that opposes sudden changes in pressure
Data Source
AI summary
A pressure relief valve is provided that includes a valve housing, a poppet valve and a damper. The valve housing includes a valve seat and a bore. The poppet valve includes a head and a stem. The head is configured to engage the valve seat when the poppet valve is in a closed position. The head is configured to disengage the valve seat when the poppet valve is in an open position. The stem projects axially out from the head and through the bore. The damper includes a damper chamber axially between the valve housing and the head.