Oscillating Metering Pump With Motor-Controlled Stroke
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Solution Overview
Problem
Existing metering pumps require additional mechanical adjustments to control the metering volume, leading to increased complexity, cost, and potential phase cuts and pulsations.
Innovation Solution
A metering pump design utilizing a pendular movement with a twist angle of less than 360° and a gear arrangement with a curved running surface, where the stroke length and frequency are controlled solely by the motor, eliminating the need for mechanical adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If additional mechanical adjustments are used to control metering volume, then metering volume control is achieved, but device complexity increases
Solution Approach 1:
The patent replaces mechanical stroke length adjustment mechanisms with electronic motor control. The metering volume is controlled by adjusting the rotation angle of the drive motor rather than mechanical linkages, thereby eliminating complex mechanical adjustments while maintaining precise metering volume control.
Solution Approach 2:
The patent changes the control parameter from mechanical stroke length to motor rotation angle. By controlling the metering volume through electronic adjustment of the drive motor's rotation angle, the system achieves adaptability without requiring additional mechanical components.
2Adaptability or versatility
If mechanical stroke length adjustment is provided, then metering volume can be adjusted, but manufacturing cost increases
Solution Approach 1:
The patent eliminates mechanical stroke adjustment mechanisms and replaces them with electronic motor control. This substitution reduces manufacturing costs by removing complex mechanical components while maintaining the ability to adjust metering volume through software-controlled motor parameters.
3Adaptability or versatility
If mechanical stroke adjustment is implemented, then metering volume control is possible, but phase cuts and pulsations occur
Solution Approach 1:
The patent replaces mechanical stroke adjustment with electronic control of the drive motor. This substitution eliminates phase cuts and pulsations that occur in mechanical systems, ensuring uniform sinusoidal movement of the connecting rod while maintaining metering volume control through motor parameter adjustment.
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
Simplifies the pump design, reduces manufacturing costs, and ensures a uniform sinusoidal movement without phase cuts or pulsations, allowing for precise control of the metering volume.
Implementation Method 1
a rotation movement of the drive about the rotation axis is converted by a gear arrangement into an oscillating movement of a connecting rod
Data Source
AI summary
A metering pump for conveying fluids, with a metering head in which a metering chamber is arranged, a displacement element that can be moved back and forth between a first position and a second position on a movement axis, and a drive that rotates around a rotation axis, whereby a rotation movement of the drive around the rotation axis is converted into an oscillating movement of a connecting rod by a gear arrangement. The connecting rod is connected to the displacement element in such a way that the displacement element is moved back and forth along the movement axis, whereby the drive performs a pendular movement with a twist angle of α<360° and a frequency f during the operation of the metering pump, and the gear arrangement comprises a cam 10 gear that is arranged on the rotation axis and has a curved running surface that deviates at least in sections from a circular path around the rotation axis, with the connecting rod rolling over a roller on the running surface, so that a stroke length of the displacement element is determined by the twist angle α and a slope of the running surface and a stroke frequency of the displacement element is determined by the frequency f.