Self-damping vibration-elimination magnetic levitation artificial heart blood pump rotor and preparation method thereof

Abstract

The invention discloses a self-damping vibration elimination magnetic levitation artificial heart blood pump rotor and a preparation method thereof, which comprises a ring-shaped rotor body which is suspended at the middle of a blood pump through a magnetic levitation system, wherein the rotor body rotates around a rotating shaft which is positioned at the middle of the rotor body, the rotor body is internally provided with a hollow part, at least one damping block is placed in the hollow part, the damping block is connected with the rotor body through an elastic connector, and the hollow part is filled with damping liquid. The invention has the main beneficial effects that as the damping block and the damping liquid are arranged, damping can be provided for the swinging and the vibration of the rotor in the interior of the rotor, accordingly, the vibration of the blood pump rotor, caused by various imbalances, can be greatly reduced, the heat of the magnetic levitation system can be reduced, the scraping between the blood pump rotor and a stator can be reduced, the probability of failure of the magnetic levitation can be greatly reduced, and further, the reliability and the comfortableness of an artificial heart system can be improved.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to an implantable artificial organ manufacturing technology, in particular to a rotor of an artificial heart blood pump using magnetic levitation technology. The invention also relates to the field of rotor dynamics, in particular the suppression of vibrations in the event of possible resonance of the rotor. Background technique [0002] The rapid development of the artificial heart is mainly due to the rapid development of its main component, the blood pump. Now, the magnetic levitation blood pump has become an important technology in the new generation of artificial heart. In order to meet the requirements of implantability, the magnetic levitation magnetic circuit of the artificial heart is usually optimized very carefully. The blood pump suspends the impeller through the magnetic levitation system, and the impeller is directly permanent magnetized. The stator of the blood...

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Problems solved by technology

When the frequency of the aforementioned interference is close to or equal to the resonance frequency of the rotor, the rotor will generate severe resonance, which will greatly increase the heating of the magnetic levitation system, increase the possibility of scraping between the rotor and the stator, and even the failure of the magnetic levitation, thereby reducing the artificial heart. System reliability and comfort

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