Dosing Pump Stroke Adjustment via Angled Control Element
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Solution Overview
Problem
Existing dosing pumps face challenges in adjusting dosing volume accurately and cost-effectively, with known solutions being complex, costly, and offering limited resolution for fine-tuning.
Innovation Solution
A dosing pump design featuring a control element that moves along a control axis at an angle to the movement axis, coupling its movement with the stop element, allowing for precise adjustment of the dosing volume without direct force application on the stop element, using an actuator and surfaces with specific angles to reduce required force and enhance accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If an eccentric shaft is used to adjust the stroke movement of the piston, then the dosing volume can be adjusted, but the device complexity increases and the connection is more susceptible to failure
Solution Approach 1:
The invention extracts the stop element from the drive mechanism, allowing it to be adjusted independently by a control element rather than being integrated into the drive system. This separates the dosing volume adjustment function from the drive mechanism, reducing complexity and improving reliability.
Solution Approach 2:
The control element acts as an intermediary between the user and the stop element. Instead of directly adjusting the stop element under drive force, the control element mediates the adjustment process, reducing the force required and simplifying the adjustment mechanism.
2Ease of operation
If a metallic stop with spindle adjustment is used, then the stroke length can be limited, but the resolution of dosing volume adjustment is limited due to short eccentricity
Solution Approach 1:
The invention changes the adjustment from a linear spindle rotation to a rotational movement of the control element around the drive axis. This dimensional change allows for finer resolution in dosing volume adjustment by utilizing angular positioning rather than limited linear travel.
Solution Approach 2:
The stop element is made adjustable during operation rather than being fixed. The control element enables dynamic adjustment of the stop position, allowing the dosing volume to be modified without changing the drive mechanism or replacing components.
3Ease of operation
If the stop element is directly adjusted by applying force in the direction of movement axis, then the adjustment is direct, but the force required is high due to restoring force of displacement element
Solution Approach 1:
The control element serves as a mechanical advantage intermediary. By rotating the control element around the drive axis, a small rotational force generates a larger linear displacement of the stop element perpendicular to the drive axis, reducing the force required for adjustment.
Solution Approach 2:
The adjustment force is applied perpendicular to the drive axis through the control element's rotation, rather than directly along the movement axis. This dimensional change in force application reduces the direct opposition to the restoring force of the displacement element.
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 provides a simple, cost-effective, and precise method for adjusting dosing volume, reducing wear on the stop element and allowing for flexible use in various applications by decoupling the stop element from the drive force, enabling accurate and efficient dosing volume adjustments.
Implementation Method 1
a biasing element (5) is provided which exerts a restoring force on the displacement element (2) in the direction of the suction position
Data Source
AI summary
A dosing pump for conveying a fluid, having a displacement element and a dosing chamber, the displacement element delimiting the dosing chamber and being movable back and forth on a movement axis between a pressure position and a suction position, a drive being able to apply a driving force to the displacement element in the direction of the pressure position. A restoring force is exerted on the displacement element in the direction of the suction position by a biasing element. A stop element is provided which limits the movement of the displacement element in the direction of the suction position, and the stop element can be adjusted along the axis of movement via a control element which can be moved along a control axis in order to set a dosing volume of the dosing pump.