Fluid Pump Radially Compressible Rotor Design
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Solution Overview
Problem
Existing fluid pumps with compressible rotors face challenges in achieving reliable operation and easy deployment and removal, especially in small, difficult-to-access locations like the human body, due to complex constructions and high costs.
Innovation Solution
A fluid pump design featuring a rotatable rotor made from elastically compressible and expandable materials, with impeller blades connected to a hub that can be stretched longitudinally, allowing for transverse contraction and radial compressibility, facilitated by push- and pull-elements and a housing that can be stretched or compressed for easy deployment and removal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex constructions are used for compressible pumps, then reliability and service life are improved, but manufacturing difficulty and cost increase
Solution Approach 1:
The patent combines the rotor and impeller blades into a single integrated component made of elastically compressible material. The rotor body itself forms the impeller blades without separate components, merging structural support and fluid conveyance functions into one element that simplifies construction while maintaining reliability through elastic deformation during compression and expansion cycles
Solution Approach 2:
The elastically compressible rotor serves multiple functions simultaneously: it provides structural support, enables radial compression for deployment, conveys fluid through its impeller blade configuration, and absorbs mechanical stresses. This multi-functionality reduces the need for additional components while ensuring reliable operation in difficult-to-access locations
2Ease of operation
If radial compression is achieved through complex mechanisms, then compressibility is improved, but device complexity increases
Solution Approach 1:
The patent changes the material parameter of the rotor from rigid to elastically compressible, enabling radial compression through material deformation rather than mechanical mechanisms. The rotor's elastic properties allow it to be compressed radially during deployment and expand to its original shape during operation, achieving ease of operation without complex compression mechanisms
Solution Approach 2:
The patent replaces traditional mechanical compression mechanisms (such as levers, links, or articulated structures) with elastic material deformation. The elastically compressible rotor undergoes reversible elastic deformation to achieve radial compression, substituting a simple material property for a complex mechanical system and thereby reducing device complexity
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 enables simple, cost-effective, and reliable operation of the fluid pump, allowing for efficient radial compressibility and stability under fluid pressure, making it suitable for medical applications like blood vessel deployment and easy removal through a sluice.
Implementation Method 1
the rotor at least partly comprising an elastically compressible and expandable material and being elastically stretchable in the direction of its longitudinal axis
Data Source
AI summary
To design the rotor as compressible in the radial direction in a fluid pump, in particular for microinvasive medical use, said rotor is configured as stretchable in its longitudinal direction by push elements and pull elements acting axially on it.