Ultrasonic Field Vessel Layout Using Flat Oscillation Elements
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Solution Overview
Problem
Existing acoustic separation technologies face challenges with high pressure amplitudes and manufacturing complexity in cylindrical geometries, leading to particle damage and increased costs, especially in biotechnological and medical applications.
Innovation Solution
The use of flat oscillation elements connected to a vessel via a parallel flat surface in a circular-cylindrical interior, reducing high pressure amplitudes and simplifying manufacturing by employing flat piezoceramic plates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If curved oscillation elements are used in cylindrical vessels, then acoustic separation effectiveness is improved, but manufacturing complexity and cost increase significantly
Solution Approach 1:
The curved oscillation element is divided into multiple flat segments (first, second, third, and fourth oscillation elements) that are arranged around the cylindrical vessel. Each flat element is independently manufacturable and can be coupled to the vessel wall, avoiding the need to manufacture a single complex curved element while maintaining the acoustic separation effectiveness through distributed oscillation sources.
2Productivity
If high pressure amplitudes are used in acoustic fields, then particle concentration efficiency is improved, but particle damage increases
Solution Approach 1:
The patent creates localized acoustic fields around specific regions of the vessel by using distributed flat oscillation elements. This allows for localized particle concentration in specific zones while maintaining lower overall pressure amplitudes in the vessel, thereby concentrating particles efficiently without causing widespread particle damage.
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 design minimizes particle damage and reduces manufacturing complexity while maintaining effective acoustic separation, particularly suitable for biotechnological and medical applications.
Implementation Method 1
When a liquid is exposed to an ultrasonic field, for example by introducing oscillations from the oscillation element through the vessel into the liquid
Implementation Method 2
Acoustic separation technology is based on the mechanism of acoustic sound radiation force, known from the literature for decades, which is exerted by a standing acoustic field on particles dispersed in a liquid and concentrates them
Implementation Method 3
The oscillation element has at least one substantially flat lateral surface, and in that the oscillation element is acoustically connected via this one flat lateral surface to a substantially flat connection surface of the outside wall of the vessel
Data Source
AI summary
Various embodiments of the present disclosure are directed to a device and a method for producing a standing ultrasonic field having the frequency f in a liquid. In one example embodiment, the device includes at least one oscillation element, a substantially dimensionally stable vessel having an outside wall and a substantially circular-cylindrical interior, the vessel receiving the liquid and the at least one oscillation element. The at least one oscillation element acoustically connected to the outside wall of the vessel and electrically excited at the frequency f. The substantially circular-cylindrical interior receives liquid with an inner radius ro at least in the region of the oscillation element. The oscillation element has a mean thickness p and a width b in the direction orthogonal to a main axis of the interior, and the width b is not greater than the inner diameter 2ro.