Tension Wave Strainer Eccentric Drive for Screen Mat Stretching
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Solution Overview
Problem
Resonance flip-flow screening machines lack the ability to significantly and/or define the stretching of screen mats, resulting in lower accelerations and a higher risk of clogging due to inefficient drive mechanisms.
Innovation Solution
The integration of an eccentric drive and flexible or rigid couplings to force the second movement system, allowing for adjustable eccentricity and phase relation with existing circular oscillations, converting the machine into a force-excited sifting machine with higher acceleration and defined stretching capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If resonance drive is used to move the second motion system, then the design is simpler, but the acceleration is lower and clogging risk increases
Solution Approach 1:
The patent combines two drive mechanisms: the resonance drive (first motion system) and the forced eccentric drive (second motion system). By merging these two systems, the patent achieves both the simplicity of resonance drive and the high acceleration of forced drive, resolving the contradiction between device complexity and screening performance
Solution Approach 2:
The second motion system is designed to serve dual functions: it can operate in resonance mode (passive oscillation) and forced mode (active eccentric drive). This multi-functionality allows the system to achieve high acceleration when needed while maintaining design flexibility, resolving the contradiction between simplicity and performance
2Device complexity
If resonance drive is used, then the design is simpler, but the screen mat stretching capability is reduced
Solution Approach 1:
The patent merges resonance drive and forced eccentric drive to achieve both simplicity and precise stretching control. The forced drive component provides the necessary acceleration and stretching capability that pure resonance drive cannot achieve
Solution Approach 2:
The patent makes the drive system dynamic by allowing it to switch between or combine resonance mode and forced mode. This dynamic capability enables precise control of screen mat stretching while maintaining design flexibility, resolving the contradiction between simplicity and precision
3Productivity
If forced drive is used to move the second motion system, then higher acceleration is achieved, but the device complexity increases
Solution Approach 1:
The patent combines forced eccentric drive with resonance drive, where the forced drive provides high acceleration and the resonance drive provides simplified motion. This merging allows the system to achieve high productivity while keeping the overall complexity manageable through the synergistic interaction of the two systems
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 enhances screening capacity and reduces clogging risks, providing adaptable operation for various conditions and deck configurations, with the option to switch between resonance and force-excited modes.
Implementation Method 1
an unbalanced drive (6) which generates a circular oscillation
Implementation Method 2
connected to each other as a second motion system to the first motion system via spring elements (4), so that the first motion system excites the second motion system to oscillate
Implementation Method 3
the crossbeams which lie between the crossbeams of the first motion system are connected to each other as a second motion system to the first motion system via elastic elements (4), so that the first motion system excites the second motion system to oscillate, whereby the screen linings attached between the crossbeams (2, 3) are alternately stretched and compressed
Data Source
Figure 1~2
Figure 3a
Figure 3b
AI summary
A tension wave screen machine with flexible screen mats between a series of parallel crossbeams (2, 3), wherein every second crossbeam (2) is rigidly connected to a first motion system (1, 2, 5, 6) which is moved by an unbalanced or eccentric drive (6), and the crossbeams (3) which lie between the crossbeams (2) of the first motion system are connected to each other as a second motion system to the first motion system via elastic elements (4), such that the first motion system excites the second motion system to oscillate, wherein the screen linings attached between the crossbeams (2, 3) are alternately stretched and compressed, wherein the second motion system (3, 7, 8) is, in addition to the oscillation excited by spring elements (4), also driven by the first motion system (1, 2, 5, 6) with an eccentric movement via one or more flexible or rigid couplings (7).