Dynamic Valve Positioner Rigidity Against Impulse Forces
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Solution Overview
Problem
Conventional methods for mitigating the effects of impulse forces on positioned components, such as side guides in bottling systems, are often expensive and ineffective, leading to significant deviations in component positioning and compromised system operation.
Innovation Solution
The implementation of dynamic valves within positioner control apparatuses to provide rigidity by opposing impulse forces through restricted fluid flow, using either orifice or ball-type dynamic valves that limit flow to a constant rate or completely block it above a certain threshold, thereby reducing component deflection and motion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional methods increase internal pressure of pressurized systems to mitigate impulse forces, then rigidity of positioned components is improved, but system cost increases significantly
Solution Approach 1:
The patent changes the flow resistance parameter of the pressurized fluid system by introducing a flow restriction device. This allows the system to maintain high rigidity against impulse forces without requiring prohibitively high internal pressure, thereby reducing the cost of pressurized system components while achieving the desired strength and stability
2Force
If conventional methods increase size of cylinder bores to provide rigidity against impulse forces, then opposition force is improved, but device complexity and cost increase
Solution Approach 1:
The patent changes the fluid flow resistance parameter rather than increasing cylinder bore size. The flow restriction device creates backpressure that generates sufficient opposition force to counteract impulse forces, allowing the use of smaller, simpler cylinder bores while maintaining the required force output
3Strength
If dynamic valve restricts fluid flow to provide opposition force, then rigidity against impulse forces is improved, but fluid flow rate is reduced
Solution Approach 1:
The patent employs a dynamic valve that automatically adjusts its flow restriction based on system conditions. During normal operation, the valve maintains adequate flow rates for positioning operations. When impulse forces are detected (through pressure changes or flow disturbances), the valve dynamically increases restriction to provide the necessary opposition force, then returns to normal operation afterward
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
This approach significantly reduces component deflection and motion caused by impulse forces, enhancing system rigidity and operational efficiency while reducing costs by allowing for smaller actuators and lower internal pressures, thus maintaining precise positioning and improving safety.
Implementation Method 1
A dynamic valve is established in a positioner actuator so as to restrict fluid flow through the actuator during application of an impulse force onto at least one component capable of receiving the impulse force
Implementation Method 2
The dynamic valve limits flow to a substantially constant rate at and beyond a certain flow threshold... resulting in an increase in pressure in the positioner actuator that leads to opposition to displacement of the positioner
Data Source
AI summary
Particular embodiments of the inventive technology disclosed herein relate to the use of a dynamic valve to reduce motion caused by impulse force applied to a positioned component. Typically, the inventive technology finds application in an internally pressurized positioning system. At times, use of the inventive technology may lead to cost savings by, e.g., allowing for the use of smaller diameter positioner actuators and/or a reduced internal pressure.