Control Line Stabilizer for Pressure Regulator Oscillation Damping
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Solution Overview
Problem
Pressure regulators in industrial systems face instability and noise due to sudden changes in fluid flow demand, leading to component wear and failure, particularly during transient operations.
Innovation Solution
A pressure regulator system with a control line stabilizer that includes a disc movable between open and closed positions, operated by springs, which restricts fluid flow in response to pressure imbalances, thereby dampening abrupt changes and maintaining stability during transient operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the regulator valve responds quickly to flow demand changes, then the responsiveness is improved, but pressure oscillations and instability increase
Solution Approach 1:
A stabilizer device is introduced as an intermediary component in the control line between the regulator valve and actuator. The stabilizer includes a disc, springs, and restrictors that modify the pressure signal transmitted to the actuator, filtering out rapid fluctuations while maintaining responsiveness to sustained flow demand changes.
Solution Approach 2:
The stabilizer changes the parameters of the pressure signal by using springs with specific force constants and restrictors with controlled flow coefficients. These parameter changes create a damping effect that reduces the amplitude of pressure oscillations while maintaining the ability to respond to legitimate flow demand changes.
2Device complexity
If the control line is short, then the device complexity is reduced, but the regulator valve overshoots or undershoots during transient operation
Solution Approach 1:
The stabilizer divides the control line into functional segments: an inlet chamber, an outlet chamber, and a passageway with a disc and springs. This segmentation allows each component to perform a specific function in damping pressure oscillations without requiring a long control line.
Solution Approach 2:
The stabilizer components are nested within a compact housing. The disc is positioned within the passageway, springs are contained within chambers, and the entire assembly fits within a small volume, maintaining low device complexity while providing stabilization functionality.
3Stability of the object's composition
If the disc restricts fluid flow through the passageway, then pressure oscillations are reduced, but the fluid flow restriction increases
Solution Approach 1:
The disc is designed to move dynamically in response to pressure differential across it. During transient oscillations, the disc moves to restrict flow and dampen oscillations. During normal operation, the disc returns to a neutral position that minimizes flow restriction, maintaining adequate fluid flow rate through the stabilizer.
Solution Approach 2:
The stabilizer applies partial restriction to the control line flow, not complete blockage. The restrictors and disc provide just enough resistance to dampen pressure oscillations without significantly impeding the overall fluid flow through the regulator valve.
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 stabilizer effectively reduces oscillations and noise, enhancing the system's stability and extending the lifespan of components by gradually communicating pressure changes to the actuator assembly, ensuring smooth operation even during rapid flow demand changes.
Implementation Method 1
A first spring may be disposed in the outlet chamber and may be operatively coupled to the disc, and a second spring may be disposed in the inlet chamber and may be operatively coupled to the disc
Data Source
AI summary
A control line stabilizer includes a body defining an inlet chamber, an outlet chamber, a passageway connecting the inlet chamber and the outlet chamber, a first seat, and a second seat. A disc is disposed in the passageway and is movable between a first closed position, in which the disc engages the first seat, an open position, in which the disc is spaced away from the first seat and the second seat, and a second closed position in which the disc engages the second seat. A first spring is disposed in the outlet chamber and is operatively coupled to the disc. A second spring is disposed in the inlet chamber and is operatively coupled to the disc. The disc restricts fluid flow through the passageway by moving to the first closed position and by moving to the second closed position.