Two-degree-of-freedom electromagnetic control magnetic suspension centrifugal pump heart assisting device

Abstract

The invention discloses a two-degree-of-freedom electromagnetic control magnetic suspension centrifugal pump heart auxiliary device. A magnetic suspension centrifugal pump is mounted in a first shell, the magnetic suspension centrifugal pump comprises a stator magnetic core, a magnetic suspension coil, a driving coil and a rotor mounting cylinder, and inner convex magnetic poles protruding inwards in the radial direction are arranged on the inner side wall of the stator magnetic core in pairs; the inner convex magnetic poles are wound with magnetic suspension coils, the circumferential wall face of the rotor mounting cylinder is sleeved with driving coil, the driving coil sleeves the stator magnetic core and is clamped by the inner convex magnetic poles arranged in pairs, the rotor mounting cylinder is provided with a rotor cavity, and a rotor body is mounted in the rotor cavity. An annular rotor magnetic pole and an annular induction magnetic ring are embedded in the rotor body. A rotor body of the magnetic suspension centrifugal pump is restrained by electromagnetic force, movement of the rotor body in the two radial translation freedom degree directions is limited, other movement directions are restrained by permanent magnetic force, full magnetic suspension of the rotor is achieved, ventricular blood is transferred to the aorta after the magnetic suspension centrifugal pump is implanted into the human body, and mechanical circulation assistance and heart load reduction are achieved.

Description

technical field [0001] The invention relates to a heart assist device, in particular to a two-degree-of-freedom electromagnetic control magnetic levitation centrifugal pump heart assist device. Background technique [0002] The application of implantable cardiac assist device to achieve long-term circulatory support has become an effective method for the clinical treatment of advanced heart failure. The "continuous blood pump" developed rapidly in recent years is more suitable for long-term implantation in vivo. "Continuous blood pump" mainly includes axial flow pump and centrifugal pump, both of which use high-speed rotating impellers to drive blood flow. The traditional impeller support system is a mechanical bearing, which can limit the movement of the rotating impeller both radially and axially, and has high rigidity and compact structure. The disadvantage of mechanical bearings is that the sliding contact surfaces will generate friction, wear and local temperature ris...

AI Technical Summary

Problems solved by technology

The five-degree-of-freedom full-suspension that uses magnetic force to control the rotating impeller has a large volume, and it is difficult to implant in patients with smaller statures. It is not suitable for Asians and children.

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