Centrifugal Pump Unit Separation Under Strong Magnetic Forces
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Solution Overview
Problem
Centrifugal pumps with non-contact magnetically driven rotors face challenges in safely and efficiently exchanging the pump unit due to strong magnetic forces, posing risks of injury and damage during manual separation, especially in high-power applications.
Innovation Solution
A device is introduced that applies a mechanical force in the axial direction to separate the pump unit from the stator, utilizing an actuating mechanism such as a piston or a mounting device with elastic elements to overcome magnetic forces, ensuring safe and quick exchange.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If manual separation of pump unit from stator is used, then device complexity is reduced, but safety deteriorates due to strong magnetic forces causing injury and damage risks
Solution Approach 1:
A device with at least one actuating element is introduced as an intermediary between the operator and the pump unit. This actuating element applies mechanical force to overcome the magnetic forces holding the pump unit to the stator, enabling safe separation without direct manual handling. The intermediary device transfers the separating force while protecting the operator from injury.
2Reliability
If mechanical force is applied to separate pump unit, then safety is improved, but device complexity increases due to additional actuating mechanisms
Solution Approach 1:
The separation device is segmented into multiple independent actuating elements that can be selectively engaged. Each actuating element can independently apply force to separate the pump unit, allowing the system to achieve safety through modular components rather than a single complex mechanism. This segmentation enables simplified design while maintaining high safety standards.
3Power
If strong magnetic forces are used for high-power applications, then power increases, but ease of operation deteriorates due to difficulty in separating pump unit
Solution Approach 1:
The actuating element serves as a mediator that bridges the gap between the operator and the strongly magnetized pump unit. It provides a mechanical advantage system that multiplies the operator's force to overcome the strong magnetic attraction, making high-power pump separations as easy to operate as low-power ones. The intermediary device translates small operator inputs into large separating forces.
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 device enables a simple, quick, and safe separation of the pump unit, reducing the risk of injury and damage, particularly beneficial for high-power centrifugal pumps with single-use units, enhancing operational efficiency and safety.
Implementation Method 1
an actuating device with which a mechanical force can be exerted on the pump unit, wherein the mechanical force acts in the axial direction and is directed in such a way that it separates the pump unit from the stator in axial direction
Implementation Method 2
the stator is designed for a non-contact magnetic drive and a non-contact magnetic levitation of the rotor
Implementation Method 3
non-contact magnetic levitation of the rotor
Implementation Method 4
the rotor is passively magnetically stabilized with respect to the stator at least in axial direction
Data Source
AI summary
A device for changing a pump unit of a centrifugal pump is proposed. The centrifugal pump includes the pump unit and a stator extending in an axial direction. A cup-shaped recess is provided at the first axial end of the stator into which the pump unit is capable of being inserted. The device includes an actuating device with which a mechanical force is capable of being exerted on the pump unit. The mechanical force acts in the axial direction and is directed in such a way that it separates the pump unit from the stator in the axial direction.