Compact axial-flow magnetic-levitation artificial heart pump

Abstract

The invention provides a compact axial-flow magnetic-levitation artificial heart pump, in particular to an artificial heart pump characterized in that two permanent magnet bearings and a mix of radial magnetic bearing suspension, and the radial magnetic bearing and a permanent magnet motor share a stator and a rotor. The compact axial-flow magnetic-levitation artificial heart pump has the structure that the compact axial-flow magnetic-levitation artificial heart pump comprises a stator assembly, a rotor assembly, a front guidance impeller and a rear guidance impeller; a taper-shaped or axial permanent magnet bearing is respectively formed by a first permanent magnet (9) and a right permanent magnet ring (14) as well as a second permanent magnet (19) and a left permanent magnet ring (18) to realize the purpose that the rotor axially supports in a suspension mode; a torque coil (5) and a suspension coil (7) are respectively wound on a motor stator (6); and with a certain decoupling control algorithm, the motor stator not only generates torque force but also generates radial suspension support force. In the compact axial-flow magnetic-levitation artificial heart pump, the rotor is supported by permanent magnetic force and electromagnetic force, and the compact axial-flow magnetic-levitation artificial heart pump has the advantages of small damage on blood, less radiation, compact structure and the like, is easy to transplant, is suitable for patients suffering from cardiac function failure, heart diseases and the like and can be used for ventricular assisting for a long time or a short time.

Description

technical field [0001] The invention relates to the field of artificial hearts, in particular to a blood pump which applies conical permanent magnetic bearings or axial permanent magnetic bearings, magnetic force bearings and bearingless motors to the field of artificial hearts. Background technique [0002] Ventricular assist device is an important means of sustaining life for heart patients. With the continuous improvement and development of materials, manufacturing process, control and electronic technology, artificial heart pumps have successively appeared pneumatic, electric, electro-hydraulic and other drive methods, and the blood produced is closer to the physiological heart. At present, artificial heart pumps are divided into pulsating type and non-pulsating type in principle. The pulsating pump is suitable for the physiological characteristics of the human body. Due to the valve, elastic diaphragm and large ventricular capacity, it is large in size and cannot be im...

AI Technical Summary

Problems solved by technology

[0003] In the patent document "Magnetic Suspension Artificial Heart Pump" with application number 200710039971.7, the blood pump rotor is supported by two radial electromagnetic bearings, the axial direction is supported by permanent magnets, and an independent motor drives the rotor to rotate. relatively large

In the patent document "A Magnetic Levitation Artificial Heart Pump" with application number 201110128669.5, the blood pump rotor is supported by two radial permanent magnetic bearings, and at least one axial electromagnetic bearing is provided in the axial direction, and an independent motor is used to drive the rotor to rotate. Larger, the rotor assembly is not an integral structure, there is a dead angle in the flow field, and it is easy to form a thrombus

In addition, traditional artificial heart pump support systems generally use rolling (such as ceramic bearings) or sliding bearings. The common feature of these bearings is that there is friction, which requires lubrication and sealing, which destroys blood cells and is prone to thrombosis

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