Magnetic Levitation Centrifugal Pump Outlet Connector Positioning
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Solution Overview
Problem
Magnetic levitation centrifugal pumps face challenges in coupling the upper and lower elements due to discontinuities in the coupling surface, which complicates welding and can lead to blood contamination and damage from dust and irregularities.
Innovation Solution
The magnetic levitation centrifugal pump design positions the outlet connector separately from the perimeter flange, creating a flat coupling surface and using an air space for tightening, allowing for easier assembly and reduced risk of contamination, with a concave contact surface and inclined outlet connector to prevent blood damage and dust entry.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the outlet connector is positioned at the perimeter flange location, then the pump structure is compact, but the coupling surface has discontinuities that complicate welding and cause blood contamination
Solution Approach 1:
The pump housing is divided into upper and lower elements that are coupled together, with the outlet connector positioned on the upper element away from the coupling surface. This segmentation allows the coupling surface to be separate from the outlet connector, eliminating discontinuities and ensuring a flat, reliable welding surface while maintaining compact overall structure.
2Productivity
If the outlet connector is positioned tangentially to the perimeter flange, then the pump layout is optimized, but dust enters the blood treatment area during welding
Solution Approach 1:
A flange element acts as an intermediary structure between the upper and lower pump housing elements. The outlet connector is positioned on the upper element at a location spaced from the coupling surface, and the flange provides a dedicated coupling interface. This intermediary structure allows welding to occur at the flange interface away from the blood treatment area, preventing dust contamination while maintaining assembly efficiency.
3Ease of manufacture
If the coupling surface has discontinuities for outlet connector positioning, then the outlet connector integration is simplified, but the O-ring sealing creates blood stagnation cavities
Solution Approach 1:
The outlet connector is extracted from the coupling surface location and positioned separately on the upper element. This separation allows the coupling surface to be completely flat and continuous, providing an ideal sealing surface for the O-ring without any discontinuities that would create blood stagnation cavities. The outlet connector integration is simplified by positioning it at a location spaced from the coupling interface.
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 simplifies the coupling process, maintains contact during welding, reduces blood stagnation, and minimizes contamination risks, enhancing the safety and efficiency of the magnetic levitation centrifugal pump.
Implementation Method 1
outside the hollow body a stator element is positioned which is adapted to define at least one magnetic field for lifting and controlling the rotor element in rotation inside the hollow body
Implementation Method 2
magnetic levitation centrifugal pump
Implementation Method 3
a rotor element provided with a plurality of blades adapted to convey, as a result of the rotation of the rotor element itself, the incoming blood towards the outlet connector
Data Source
AI summary
A magnetic levitation centrifugal pump comprises: an internally hollow body, an inlet connector and an outlet connector for blood. The hollow body comprises a lower element and an upper element which are mutually coupled to each other; a rotor element housed inside the hollow body and provided with a portion made of magnetic material, the rotor element being magnetically commanded in rotation about a relative axis, without contact, by a stator element associable with the hollow body. The upper element has a perimeter flange for coupling and a substantially dome-shaped body projecting from the perimeter flange. The outlet connector is associated with the dome-shaped body and is spaced away from the perimeter flange, between the outlet connector and the perimeter flange being defined an air space inside which mutual tightening device/component can be inserted for the tightening of the upper element with the lower element.