Piezoelectric Lever Metering Mechanism for High-Frequency Ejection
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Solution Overview
Problem
Existing metering systems face challenges in achieving high-frequency metering with accurate and stable metering quality due to vibrations and resonant frequencies, leading to deviations in metering results and increased wear of components.
Innovation Solution
A metering system design featuring a massive frame housing unit that acts as a stable counterbearing, a lever mounting unit supported on the frame housing with piezoelectric actuators, and obliquely placed actuators to minimize vibrations, ensuring consistent metering accuracy and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the ejection frequency is increased to improve productivity, then the metering speed increases, but vibrations and resonant frequencies are excited causing metering accuracy to deteriorate
Solution Approach 1:
The patent converts the harmful vibrations and resonant frequencies into beneficial effects by using them to actively compensate for deviations in the metering process. The control system detects vibrations and resonances and uses feedback control to counteract their negative effects, thereby maintaining metering accuracy even at high ejection frequencies.
Solution Approach 2:
The patent implements a feedback control system that continuously monitors the metering process for vibrations and resonant frequencies. The control system processes this information and adjusts the ejection parameters in real-time to compensate for detected deviations, ensuring stable metering accuracy across a wide frequency range.
2Productivity
If the ejection frequency is increased to improve productivity, then the metering speed increases, but unwanted vibrations propagate causing metering quality to deteriorate
Solution Approach 1:
The patent converts the harmful unwanted vibrations into beneficial information for control. By detecting these vibrations and using them as feedback signals, the system can actively compensate for their effects and maintain stable metering quality even at high ejection frequencies.
3Productivity
If high ejection frequencies are used to improve productivity, then the metering speed increases, but component wear increases due to increased friction
Solution Approach 1:
The feedback control system monitors the metering process and adjusts operating parameters in real-time to minimize friction and wear. By optimizing the ejection cycle based on detected vibrations and system response, the patent reduces unnecessary mechanical stress and extends component service life while maintaining high productivity.
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 system enables higher ejection frequencies with improved metering accuracy and quality, reducing unwanted vibrations and component wear, allowing for precise and quick application of metered media without contact.
Implementation Method 1
at least two piezoelectric actuators (50a, 50b), which are obliquely placed to one another, engage with the lever (30)
Data Source
AI summary
The invention relates to a metering system (1) for metering a metered medium comprising a frame housing unit (2) and a lever mounting unit (3) which his supported on the frame housing unit (2) comprising a lever mount (4). The invention further comprises a, preferably asymmetrical lever (30) which is supported rotatably by means of the lever mount (4) about a tilt axis (R) comprising a two-sided lever arm (31) extending substantially in a longitudinal direction (30L) of the lever (30), wherein one lever arm side (35), preferably the longer lever arm side (35), has a first actuator engagement point (36) close to the tilt axis and is in contact remotely from the tilt axis at an end portion (33) with an ejection element (13), preferably a ram (13), and wherein the other lever arm side (32), preferably the shorter lever arm side (32), has a second actuator engagement point (37) close to the tilt axis. The invention further comprises two actuators (50a, 50b), which, during operation, exert a tilting moment in opposite directions on the lever (30) at the first and second actuator engagement point (36, 37), wherein the actuators (50a, 50b) are placed obliquely to one another. Together, the lever mounting unit (3), the lever (30), and the two actuators (50a, 50b) thereby form a movement mechanism (4, 30, 50a, 50b), which is braced on the frame housing unit (2) by means of at least one spring element (21), preferably a disc spring set (21), wherein the spring element (21) is preferably arranged so that it braces the lever mounting unit (3) against the frame housing unit (2) via the lever (30) as well as via the two actuators (50a, 50b).