A magnetic levitation axial flow screw driving device

Abstract

The invention relates to the field of artificial heart assist devices, in particular to a magnetic levitation axial-flow screw driving device. The device consists of three parts: the stator (1), the rotor (2) and the gap (3). The winding coil (12) is arranged in the middle of the inner cavity of the stator shell (10), and the left axial magnetization permanent magnet of the stator is arranged on the left side of the inner cavity. (11), the right side of the inner cavity is provided with a stator magnetized permanent magnet (13) in the right axial direction, the stator (1) is provided with a liquid input port (14) on the axial left side, and a liquid output port (15) is provided on the axial right side , the rotor casing (20) is in the shape of a cylinder with openings at both ends, with a helical drive piece (24) inside, a rotor core (22) in the middle of the outer wall, and a rotor left axially magnetized permanent magnet on the left side of the outer wall ( 21), the right side of the outer wall is provided with a rotor right axially magnetized permanent magnet (23). The invention has simple and compact structure, small volume and high stability, and can be implanted in the body for long-term use.

Description

technical field [0001] The invention relates to an artificial heart assisting device, in particular to a magnetic suspension axial-flow screw driving device. Background technique [0002] Cardiac assist devices use biomechanical means to partially or completely replace the pumping function of the heart to maintain blood circulation throughout the body. At first, it was mainly based on bionic design and simulated heart beat, and gradually developed to focus on magnetic levitation control technology. The magnetic levitation heart assist device can realize the non-contact operation of the rotor, eliminate mechanical friction and wear, and solve the problems of severe heat generation, easy wear, great damage to blood cells, and easy formation of hemolysis and thrombus at the bearing of the mechanical heart assist device. The application of cardiac assist devices to the human body becomes possible. Magnetically levitated cardiac assist devices are divided into axial flow and cen...

AI Technical Summary

Problems solved by technology

[0003] At present, the magnetic levitation axial flow heart assist device mostly adopts the hybrid magnetic levitation structure, which relies on the force between the permanent magnets to establish the initial working state, realizes the axial and radial non-contact levitation, and then dynamically adjusts the levitation position of the rotor through the electromagnetic force. To achieve stable suspension, the system consumes less current, but the volume is too large, and the structure needs to be further optimized

The magnetic levitation rotor needs to use the leading impeller and the rear guiding impeller to realize the axial drive of the liquid. The structure is complex, which is not conducive to reducing the volume, and the impeller is easy to damage the liquid cell structure in the state of rapid rotation.

Images