Foam Pump Pulsation Damper for Pressure Stabilization
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Solution Overview
Problem
Existing foam pumps experience operating pressure fluctuations due to varying mixing ratios of liquid and propellant, leading to non-uniform substance transportation and application.
Innovation Solution
A foam pump design incorporating a pulsation damper with an adjustable damping element and an energy accumulator to stabilize pressure fluctuations, combined with a controllable propellant supply and additional mixing stages to ensure uniform foam application.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If mixing and delivery processes are performed in the foam pump, then foam generation is achieved, but pressure fluctuations occur causing non-uniform substance transportation
Solution Approach 1:
A pulsation dampener is installed in the delivery line to compensate for pressure fluctuations before they affect the foam output. The dampener acts as a cushioning element that absorbs pressure variations, ensuring uniform substance transportation despite the dynamic mixing and delivery processes.
Solution Approach 2:
The pulsation dampener serves as an intermediary element between the mixing/delivery processes and the foam output. It mediates the pressure fluctuations by absorbing and dampening them, preventing direct transmission of pressure variations to the foam stream and ensuring consistent delivery.
2Adaptability or versatility
If propellant is added to liquid medium for foaming, then foam material is generated, but mixing ratio variations cause operating pressure fluctuations
Solution Approach 1:
The pulsation dampener provides a feedback mechanism that automatically compensates for pressure fluctuations caused by mixing ratio variations. When pressure deviations occur due to propellant addition, the dampener responds by absorbing or releasing fluid to stabilize pressure, creating a self-regulating system that maintains reliability despite adaptability in mixing ratios.
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 solution ensures a consistent volume flow and homogeneous application of foam by compensating for pressure fluctuations and allowing adjustable mixing ratios, resulting in a stable and uniform foam output.
Implementation Method 1
a pulsation dampener is installed in a section of the delivery line in the foam pump, in which a damping element is installed that is adjustable within a cylinder chamber and that compensates for pressure fluctuations in the operating pressure of the foam pump
Implementation Method 2
The damping element is arranged such that it is pressurized by the liquid medium on one side facing the liquid medium and pressurized by an energy storage device on the other side. The energy storage device serves to counteract the pressure of the liquid medium.
Data Source
Figure 1
Figure 2
AI summary
Foam pump (2) for foaming a liquid medium (4), which in a conveying direction (10) of the liquid medium (4) has successively a suction stage (7) for drawing in the liquid medium (4), a feed (11) for supplying a propellant into the liquid medium (4) and a pumping stage (12) with a gear pump (13) for mixing and conveying the liquid medium (4) with propellant, characterized in that the foam pump (2) has a pulsation damper (17) for regulating the pressure in the liquid medium (4) in the conveying direction (10) downstream of the pumping stage (11).