Coupled Fluid Chambers for Precise Volumetric Flow Ratio Control
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Solution Overview
Problem
Existing methods for adjusting the volumetric flow ratio of different fluids often fail to ensure a precise and reliable control, especially when the fluids undergo a fast chemical reaction upon mixing, requiring external power sources and complex mechanical arrangements, which are costly and inefficient.
Innovation Solution
A control-device with two chambers, each containing a rotating or nutating element, where the elements are coupled to rotate or nutate at a defined frequency ratio, driven by the fluids themselves, and the chamber and resistor ratios are selected to achieve a predefined volumetric flow ratio, ensuring a high degree of flow control without external power.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If external power sources and complex mechanical arrangements are used to control fluid flow ratio, then flow control precision is improved, but device complexity and cost increase
Solution Approach 1:
The rotating elements are driven automatically by the fluid pressure itself without external power sources. The fluid flowing through the device creates pressure differences that rotate the elements, which in turn control the flow ratio automatically. This self-driven mechanism eliminates complex external drive systems while maintaining precise flow control.
Solution Approach 2:
The patent replaces complex external mechanical drive systems with an internal fluid-pressure-driven rotation mechanism. The rotating elements are actuated by the fluid flow itself rather than external motors or pumps, simplifying the overall mechanical arrangement while achieving precise volumetric flow ratio control.
2Reliability
If external power sources and complex mechanical arrangements are used to control fluid flow ratio, then flow control reliability is improved, but operating costs increase
Solution Approach 1:
The device uses the kinetic energy of the flowing fluid itself to drive the rotating elements, eliminating the need for external power sources during operation. This self-powered mechanism reduces operating costs while maintaining reliable flow control through the inherent coupling between fluid flow and rotor rotation.
3Device complexity
If conventional methods are used to adjust volumetric flow ratio, then device simplicity is maintained, but flow control precision deteriorates
Solution Approach 1:
The rotating elements act as intermediaries between the fluid flow and the flow control mechanism. These rotors translate fluid pressure into rotational motion that precisely regulates the volumetric flow ratio, providing a simple yet effective intermediary mechanism that bridges simplicity and precision.
Solution Approach 2:
The rotating elements create periodic flow modulation through their rotation, which enables precise control of the volumetric flow ratio. The periodic rotation of the elements provides continuous, smooth adjustment of flow rates while maintaining device simplicity without requiring complex control systems.
4Loss of time
If conventional flow control methods are used, then response time is acceptable, but stoichiometric ratio control during fast chemical reactions deteriorates
Solution Approach 1:
The self-driven rotating elements respond instantaneously to changes in fluid flow and pressure, providing immediate adjustment of the volumetric flow ratio. This automatic response mechanism ensures precise stoichiometric control during fast chemical reactions without the delay associated with external control systems.
Solution Approach 2:
The rotating elements provide inherent feedback between fluid flow conditions and flow ratio control. The rotation speed and position automatically adjust based on the fluid pressure and flow rate, creating a self-regulating system that maintains precise stoichiometric ratios even during rapid chemical reactions.
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 solution allows for a precise and reproducible adjustment of the volumetric flow ratio between fluids, ensuring a fixed stoichiometric ratio even during chemical reactions, with low operating and purchase costs, and no external power source is needed, maintaining stability over time despite variations in pressure and flow rates.
Implementation Method 1
the at least one rotating or nutating element of the first chamber and/or the at least one rotating or nutating element of the second chamber are/is driven by the first fluid (F1) and/or the second fluid (F2)
Data Source
AI summary
Method for adjusting the volumetric flow ratio of at least two different fluids (F1, F2) with a control-device. The control-device comprises a first chamber with a chamber-volume (VC1) for the first fluid (F1) and an inlet-element and an outlet-element for the first fluid (F1) and at least one rotating or nutating element. The control-device further comprises at least one second chamber with a chamber-volume (VC2) for the second fluid (F2), wherein the second chamber has an inlet-element and an outlet-element for the second fluid (F2) and at least one rotating or nutating element. The rotating or nutating elements are coupled so as to rotate or nutate at a defined rotational or nutational frequency ratio and are driven by the fluids (F1, F2). The chamber volume ratio (VC1:VC2) and the rotational or nutational frequency ratio are selected such that the fluids (F1, F2) flowing out of the outlet-elements have a predefined volumetric flow ratio. The input resistor (Ri) of the respective inlet-element and the output resistor (Ro) of the respective outlet-element of the first chamber and/or the second chamber are chosen so as to satisfy the equation: (I), wherein ηF is the viscosity of the respective fluid (F1, F2) and Cn designates the respective chamber.