Lamella Pump Blade Structure for Compressible Vessel Insertion
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Solution Overview
Problem
Existing fluid pumps, particularly those used in medical applications, face challenges in achieving high compressibility and expandability without requiring significant force expenditure, while maintaining efficiency and stability, especially when navigating through narrow or naturally occurring body vessels.
Innovation Solution
A blade design comprising adjacently disposed lamellae that are pivotable relative to the rotor axis, forming a continuous surface in the expanded state, allowing for easy compression and expansion without substantial external forces, and featuring a spiral mounting on the rotor shaft for enhanced stability and fluid counterpressure resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the blade is made as a single continuous structure, then structural integrity is improved, but compressibility deteriorates
Solution Approach 1:
The blade is divided into multiple individual lamellae that can pivot relative to each other. This segmentation allows the blade to compress easily during insertion while maintaining structural integrity during operation, as each lamella can independently adjust its position without compromising the overall blade strength.
2Length of moving object
If the blade is made with multiple partial blades, then compressibility is improved, but manufacturing complexity increases
Solution Approach 1:
The blade consists of multiple identical or similar lamellae that can be manufactured using the same process and then assembled. This standardization of segments reduces manufacturing complexity compared to creating custom multi-component structures, while still achieving the desired compressibility through the pivoting action of the individual lamellae.
3Length of moving object
If the blade lamellae are made movable relative to each other, then compressibility is improved, but stability deteriorates
Solution Approach 1:
The lamellae are designed to be movable during insertion and compression phases, but become stable during the pumping operation phase. The pivoting mechanism allows dynamic adjustment during compression while maintaining a stable, continuous blade surface during operation, thus achieving both compressibility and operational stability.
4Ease of operation
If the pump is designed for high compressibility, then ease of insertion is improved, but force expenditure increases
Solution Approach 1:
The segmented lamella structure allows the blade to compress in a controlled manner during insertion, distributing the compression forces across multiple individual elements rather than requiring a single large force. This reduces the peak force expenditure needed for insertion while maintaining high compressibility.
Solution Approach 2:
The movable lamellae enable the blade to dynamically adjust its configuration during insertion, transitioning from an expanded operational state to a compressed insertion state. This dynamic transformation reduces the force required compared to forcing a rigid structure through narrow vessels.
Data Source
AI summary
The invention relates to a compressible and expandable blade for the rotor of a fluid pump having at least two lamellae which are disposed adjacently, are pivo table respectively relative to an axis of rotation of the rotor and moveable relative to each other, and abut against each other in the expanded state of the blade such that they form together a continuous blade surface.