Eddy-Current Screening System Ultrasonic Vibration Introduction
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Solution Overview
Problem
Existing sieve systems with cylindrical jacket-shaped sieve surfaces face inefficiencies in introducing ultrasonic vibrations due to indirect transmission methods, leading to high energy consumption and unnecessary heating.
Innovation Solution
A sieve system design featuring annular portafilters and resonators that directly introduce ultrasonic vibrations into the sieve surface, eliminating the need for indirect transmission through portafilters, with the resonator extending along the sieve surface to enhance vibration introduction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If ultrasonic vibrations are transmitted indirectly through portafilters to the sieve surface, then the sieve surface can be vibrated, but high energy expenditure and unnecessary heating occur
Solution Approach 1:
The resonator is extracted from the indirect transmission path (portafilter) and attached directly to the sieve surface, eliminating the intermediate transmission step that caused energy loss. This direct attachment allows ultrasonic vibrations to be introduced efficiently without heating the portafilter unnecessarily.
Solution Approach 2:
The resonator serves as a dedicated intermediary element that directly couples the ultrasonic generator to the sieve surface. By positioning the resonator at the vibration node of the sieve surface and attaching it directly, ultrasonic vibrations are transmitted efficiently without the energy losses associated with indirect transmission through portafilters.
2Ease of operation
If vibration transducers are attached to portafilters, then ultrasonic vibrations can be generated, but sufficient ultrasound transmission into the sieve fabric cannot occur
Solution Approach 1:
The mechanical attachment of vibration transducers to portafilters is replaced by a resonator system that directly couples to the sieve surface at its vibration node. This substitution enables effective ultrasonic transmission by eliminating the mechanical decoupling effect of the portafilter.
Solution Approach 2:
The resonator extends in the axial direction of the sieve surface, creating a new dimension for ultrasonic vibration introduction. This axial extension allows the resonator to reach the vibration node of the sieve surface and transmit ultrasonic vibrations effectively, whereas portafilter attachment only provides radial vibration.
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 allows for efficient and uniform introduction of ultrasonic vibrations into the sieve surface with reduced energy expenditure, improving sieving efficiency and minimizing energy consumption.
Implementation Method 1
at least one resonator for introducing ultrasonic vibrations directly into the sieve surface
Implementation Method 2
the resonator in particular forms the pressure rod
Implementation Method 3
at least one pressure rod which clamps the portafilters together in such a way that a compressive stress is created between the portafilters
Implementation Method 4
material to be screened is fed into a screening chamber, where it is stimulated to a vortex flow by means of a rotor located in an interior enclosed by the screen surface
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
The invention relates to, inter alia, a screening system (10), comprising: at least one first substantially annular screen support (11) and a second substantially annular screen support (12); at least one pressure rod (14), which braces the screen supports (11, 12) with each other in such a manner that a compressive stress is produced between the screen supports (11, 12); at least one substantially cylindrical outer screen surface (13), which is clamped between the screen supports (11, 12); and at least one resonator (15) for the introduction of ultrasonic vibrations directly into the screen surface (13). According to a first embodiment of the invention, the resonator (15) is fastened to the screen surface (13) and essentially runs from the first screen support (11) to the second screen support (12). The invention further relates to an eddy-current screening machine and to the use of a screening system (10) or of an eddy-current screening machine.