Double Diaphragm Pump Independent Actuator Control
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Solution Overview
Problem
Double diaphragm pumps experience periodic supply pressure drops and serrated pressure curves due to mechanical interdependence of diaphragms, leading to inefficient fluid supply and potential interruptions, especially in two-component spraying systems where consistent pressure is required.
Innovation Solution
The pump features independently controlled first and second diaphragms with actuators and valves that manage movement based on conditions such as time, pressure, and position, ensuring constant supply pressure without mechanical interdependence, allowing for synchronized yet offset movement to maintain consistent fluid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the two diaphragms are mechanically connected by a shaft to move in unison, then the pump structure is simplified and synchronized operation is achieved, but periodic supply pressure drops and serrated pressure curves occur
Solution Approach 1:
The pump is divided into two independently controllable diaphragm units, each with its own actuator and control system. This segmentation allows independent control of each diaphragm's movement, enabling offset timing between the two diaphragms to eliminate pressure drops while maintaining structural organization.
Solution Approach 2:
The control system dynamically adjusts the timing and movement of each diaphragm based on operational conditions. By making the diaphragm operation dynamic and adaptable rather than fixed and synchronized, the system can optimize pressure delivery and eliminate periodic pressure drops.
2Stress or pressure
If the diaphragm is in the deflected position under tension, then high ejection pressure is achieved at the beginning of the ejection phase, but the ejection pressure decreases subsequently creating a serrated pressure curve
Solution Approach 1:
The system uses periodic action with offset timing between two diaphragms. While one diaphragm is completing its stroke, the other begins its ejection phase, creating overlapping periodic actions that smooth out the overall pressure delivery and eliminate the serrated curve effect.
Solution Approach 2:
By offsetting the timing of the two diaphragms, the system ensures continuous useful action without interruption. As one diaphragm finishes its ejection, the other is already building pressure, maintaining continuous and stable fluid delivery without pressure drops or gaps.
Data Source
AI summary
A first diaphragm which forms a wall of a first pump chamber is provided in the double diaphragm pump according to the invention, wherein the first diaphragm can be moved by means of a first driving means. In addition, a second diaphragm which forms a wall of a second pump chamber is provided, wherein the second diaphragm can be moved by means of a second driving means. What is more, a control for the driving means is provided, said control being designed and operable such that it controls the two driving means subject to one or a plurality of conditions.