Scroll Pump Magnetic Drive Radial Clearance Control
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Solution Overview
Problem
Existing scroll pumps face issues with fluid leakage due to excessive radial clearance, which reduces pumping efficiency and ultimate pressure, especially in miniaturized versions, and tip seals can introduce particles and wear, leading to performance deterioration.
Innovation Solution
A scroll pump utilizing a magnetic drive system with a static and orbiting magnetic component to control the orbiting motion of the scroll, minimizing fluid leakage by ensuring sealing engagement between the orbiting and fixed scrolls without mechanical biasing, and using polymeric materials to reduce wear and mass.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radial clearance is provided between orbiting scroll wall and fixed scroll wall, then the likelihood of locking or jamming is reduced, but fluid leakage increases and pump performance deteriorates
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the radial clearance between the orbiting and fixed scroll walls through magnetic actuation. The magnetic drive system enables controlled variation of the orbiting scroll's position, allowing the radial clearance to be optimized dynamically - maintained larger when locking risk is high, and reduced when pumping efficiency is prioritized, thus resolving the contradiction between reliability and energy loss
Solution Approach 2:
The invention implements dynamics by transitioning from a static radial clearance design to a dynamic one. The magnetic drive mechanism allows the radial clearance to vary during operation, enabling the system to adapt between different operational states - preventing locking/jamming when needed while minimizing fluid leakage during efficient pumping, thereby resolving the contradiction through temporal separation of conflicting requirements
2Loss of energy
If tip seals are used to seal between orbiting scroll and fixed scroll, then fluid leakage is reduced, but wear increases and particles are introduced into pumped fluid
Solution Approach 1:
The patent replaces the mechanical tip seal system with a magnetic sealing mechanism. Instead of using physical contact seals that wear and contaminate the pumped fluid, the magnetic drive system creates sealing through controlled magnetic fields that prevent fluid leakage without mechanical contact, thereby eliminating wear and particle generation while maintaining leakage prevention
Solution Approach 2:
The invention introduces magnetic fields as an intermediary between the orbiting and fixed scrolls to achieve sealing. Rather than direct mechanical contact through tip seals, the magnetic field acts as a mediator to prevent fluid leakage across the gap, avoiding the wear and contamination issues associated with mechanical seals while maintaining effective sealing
3Adaptability or versatility
If scroll pump size is reduced for miniaturization, then application breadth is diversified, but fluid leakage contribution to performance deterioration increases
Solution Approach 1:
The patent applies parameter changes by using magnetic actuation to dynamically control the radial clearance and orbital parameters of the miniaturized scroll pump. This enables the small pump to optimize its sealing characteristics in real-time, compensating for the inherently larger relative clearance in miniaturized designs and maintaining pumping efficiency across diverse applications
Solution Approach 2:
The invention implements dynamics through magnetic control, allowing the miniaturized scroll pump to dynamically adjust its operational parameters including radial clearance and orbiting motion characteristics. This dynamic capability enables the small pump to maintain effective sealing and pumping performance across various applications, overcoming the fluid leakage issues that typically plague miniaturized designs
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 magnetic drive system minimizes fluid leakage, reduces wear, and enhances the lifespan of the pump, while the polymeric materials help in achieving efficient pumping with reduced power input, eliminating the need for tip seals and minimizing component wear.
Implementation Method 1
The magnetic drive system comprises a static magnetic component and an orbiting drive component. In use, the static magnetic component imparts an orbiting motion to the orbiting drive component such that the orbiting drive component orbits substantially about an orbital axis.
Implementation Method 2
A scroll pump utilizing a magnetic drive system with a static and orbiting magnetic component to control the orbiting motion of the scroll, minimizing fluid leakage by ensuring sealing engagement between the orbiting and fixed scrolls without mechanical biasing
Data Source
Figure 1
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AI summary
The present invention relates to a scroll pump comprising an orbiting scroll and a fixed scroll. The scroll pump further comprises a magnetic drive system. The magnetic drive system comprises a static magnetic component and an orbiting drive component. In use, the static magnetic component imparts an orbiting motion to the orbiting drive component such that the orbiting drive component orbits substantially about an orbital axis. The orbiting drive component is coupled to the orbiting scroll such that, in use, the orbiting scroll orbits about said orbital axis.