Resonant Micropump Flow Restrictors for Low-Wear Pressure Control

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Solution Overview

Problem

Existing micropumps struggle to efficiently pump fluids across a wide range of pressures and throughputs, and they often suffer from mechanical wear and energy losses due to contact between moving parts.

Innovation Solution

A resonance-based micropump design featuring flow restricting elements that transition between flow permitting and restricting states in response to chamber pressure modulation, using a driver to apply harmonic forces at a selected frequency, minimizing mechanical contact and optimizing fluid flow through phase-shifted elements.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If contact-based mechanical pumps are used to pump fluid across wide pressure ranges, then pumping capability is improved, but mechanical wear and energy losses increase

Engineering Contradiction:

Improvepumping capabilityVSAvoidmechanical wear

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent replaces traditional contact-based mechanical pumping mechanisms with a resonance-based system using flow restricting elements that oscillate in response to chamber pressure modulation. This eliminates mechanical contact and wear while maintaining pumping capability across wide pressure ranges.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent utilizes resonance and harmonic oscillation of flow restricting elements at selected frequencies to control fluid flow. The driver applies periodic forces to create controlled vibrations that enable the pump to move fluid without mechanical contact, reducing wear and energy loss.

Inventive Principle:

Principle #18Mechanical vibration

2Loss of energy

If flow restricting elements are used to control fluid flow, then energy loss is reduced, but mechanical wear increases due to contact between moving parts

Engineering Contradiction:

Improveenergy lossVSAvoidmechanical wear

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The patent replaces contact-based flow control mechanisms with a resonance-based system where flow restricting elements oscillate without mechanical contact. This maintains energy efficiency while eliminating the mechanical wear that would otherwise occur in traditional flow control systems.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The flow restricting elements are designed to oscillate autonomously in response to chamber pressure modulation. The system uses the fluid's own pressure variations to drive the oscillation, eliminating the need for external mechanical actuation and reducing wear.

Inventive Principle:

Principle #25Self-service

3Reliability

If resonance-based flow restricting elements are used, then mechanical wear is minimized, but pumping efficiency across wide pressure ranges may be compromised

Engineering Contradiction:

Improvemechanical wearVSAvoidpumping efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent employs dynamic flow restricting elements that oscillate at resonance frequencies to control fluid flow. The system adapts to different pressure conditions through the natural resonant behavior of the elements, maintaining pumping efficiency across wide pressure ranges while minimizing mechanical wear.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent utilizes changes in chamber pressure and oscillation frequency to control the behavior of flow restricting elements. By modulating these parameters, the system maintains efficient pumping performance across varying pressure conditions without requiring mechanical contact or wear-prone components.

Inventive Principle:

Principle #35Parameter changes

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 design achieves efficient fluid pumping across varying pressures and throughputs with reduced energy loss and minimal mechanical wear, enhancing the pump's efficiency and reliability.

Implementation Method 1

The flow restricting elements cyclically transitioning between a range of flow permitting states... and a range of flow restricting states... in response to a modulation of conditions within the chamber, typically volume or pressure, resulting in application of harmonic forces on the elements. A driver is configured to apply said modulation of conditions at a selected characteristic frequency profile

Methodology Applied

Scientific EffectResonance: Resonance

Data Source

PatentEP4285025B1Fluid pumping arrangement

Publication Date: 2025.10.29 Q T FLOW LTD

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Figure 1B
Figure 1C

AI summary

A fluid pump for pumping a fluid between a fluid inlet and a fluid outlet has a chamber with an inlet and an outlet. At least one flow restricting element is disposed at a flow line portion and is configured to resonate along a continuum of states between a first end state and a second end state to thereby affect fluid flow profile through said inlet or said outlet. While resonating the element transitions through a range of states differing in the flow they permit. A driver is configured to modulate conditions in the chamber or on the at least one flow restricting element at a characteristic frequency profile, thereby inducing the at least one flow restricting element to resonate between the first and second states at about said characteristic frequency profile.