Diaphragm Pump Eccentric Drive Eliminates Wear-Prone Valves
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Solution Overview
Problem
Conventional diaphragm pumps suffer from uncontrolled flow due to dependence on ambient conditions and wear-prone check valves, making them unsuitable for high-precision dosage applications.
Innovation Solution
The diaphragm pump features a rotatably mounted pump head with a drive transmission element and a coupling element that generates oscillatory movement, allowing for defined and independent pumping behavior by rotating the shuttle valve arrangement, eliminating the need for diaphragm valves and ensuring wear-resistant operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional diaphragm valves are used for flow control, then the pump structure is simple, but the valve opening and closing behavior is scarcely defined and susceptible to wear
Solution Approach 1:
The patent replaces the mechanical diaphragm valve system with a magnetic field-based valve disk actuation system. The valve disk is magnetically coupled to a drive transmission element, eliminating direct mechanical contact and wear-prone components. This substitution provides precisely defined opening and closing behavior through magnetic field control while improving durability by removing the diaphragm valve's weak points.
2Reliability
If passive check valves are used in inlet and outlet ducts, then the pump structure is simple, but the pumping behavior depends on changing ambient conditions and positive pressure differences can cause uncontrolled flow
Solution Approach 1:
The patent replaces passive mechanical check valves with an actively controlled valve disk system driven by magnetic coupling. This active control mechanism ensures consistent pumping behavior independent of ambient conditions by precisely regulating flow direction and preventing uncontrolled flow under positive pressure differences, while maintaining structural simplicity through the integrated drive mechanism.
Solution Approach 2:
The magnetic coupling system provides precise control feedback for valve disk actuation, ensuring that the valve opens and closes at the correct moments in the pumping cycle regardless of pressure conditions. This feedback mechanism eliminates the ambiguity of passive check valves and ensures reliable, consistent pumping behavior.
3Ease of operation
If the diaphragm is driven directly by the drive shaft, then the drive mechanism is simple, but the valve disk actuation becomes difficult to control
Solution Approach 1:
The patent introduces a drive transmission element as an intermediary between the drive shaft and the valve disk. This intermediate component, magnetically coupled to the valve disk, provides precise control over valve actuation while keeping the overall drive mechanism manageable. The magnetic coupling acts as a mediator that transmits motion without direct mechanical contact, improving ease of operation.
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 achieves precise and consistent flow with reduced environmental influence, high chemical durability, and long lifetime, with no leakage or open flow paths, enabling high-precision dosing and scalability across various flow rates.
Implementation Method 1
guided in a bearing disk, which is mounted so as to be rotatable eccentrically with respect to the main axis of rotation, such that, owing to the eccentricity-induced displacements of the drive transmission element relative to the pump chamber and to the bearing disk, the drive transmission element generates, by way of its coupling element, the oscillatory movement of the diaphragm
Data Source
AI summary
A diaphragm pump comprises a carrier part, a drive motor with a drive shaft, a pump head with a pump chamber delimited by a diaphragm, and an inlet port and outlet port. The pump head is connected to the drive shaft such that the direction of oscillation of the diaphragm is orthogonal with respect to the axis of rotation of the drive shaft. A drive transmission element is mounted on the pump head and is guided in a bearing disk mounted to be rotatable eccentrically, so as to be displaceable orthogonally with respect to the direction of oscillation of the diaphragm, such that the drive transmission element generates the oscillatory movement of the diaphragm in the pump chamber during the rotation of the pump head, and as a result of the rotation a pump medium line arranged therein is alternately connected to the inlet port and the outlet port.