Medical semi-maglev centrifugal pump based on steel ball

A magnetic levitation and centrifugal pump technology, which is applied to parts of pumping devices for elastic fluids, pumps for special fluids, pumps, etc., can solve the problems of large heat generation, easy to cause thrombus, high calorific value, etc., and achieve mechanical friction The effect of contact reduction, improvement of antithrombotic ability, and avoidance of blood leakage

Active Publication Date: 2015-02-25
SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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AI Technical Summary

Problems solved by technology

In traditional centrifugal pumps, due to the friction at the seal of the rotor shaft, when the centrifugal pump is running at high speed, it will generate a lot of heat, which will easily lead to thrombus, and the stagnation of blood at the seal of the rotor shaft will also easily lead to thrombus. The sliding bearing used in the rotor has large mechanical friction contact and high calorific value, which is easy to cause thrombus. The present invention improves the above problems through steel spherical contact

Method used

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  • Medical semi-maglev centrifugal pump based on steel ball
  • Medical semi-maglev centrifugal pump based on steel ball

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Embodiment Construction

[0016] The present invention will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0017] Such as figure 1 As shown, the motor 22 drives the active magnetic ring 4 to rotate, and the active magnetic ring 4 transmits the rotation to the driven magnetic ring 7 through magnetic force. The driven magnetic ring 7 is integrated with the impeller impeller rotor 13, so that the motor 22 drives the impeller impeller rotor 13 to rotate. The impeller rotor 13, the driven magnetic ring 7, the pump casing upper cover 12 and the pump casing base 8 are made of polycarbonate material with good biocompatibility, and 10 permanent magnets are interlacedly embedded in the driven magnetic ring 7 and the driving magnetic ring 4 in. Due to the magnetic drive, torque can be transmitted between the motor 22 and the impeller impeller rotor 13 without mechanical contact. The problems caused by the shaft seal of the impeller impeller rotor...

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Abstract

The invention relates to a medical semi-maglev centrifugal pump based on a steel ball. The centrifugal pump comprises a motor, a driving magnet ring and a driven magnet ring, wherein the driving magnet ring is connected with a motor rotor, and the driven magnet ring is arranged in the manner of not making contact with the driving magnet ring and transmits torque through magnetic force. An isolation seal cartridge is arranged in an air gap between the driving magnet ring and the driven magnet ring. The driven magnet ring and an impeller rotor are fixedly connected together. The impeller rotor is supported through a driven side base in the radial direction and limited through the steel ball in the axial direction in a unidirectional mode. The impeller rotor presses against the steel ball through an upper ejecting block, the steel ball is arranged on the driven side base, and the lower end of the steel ball presses against a pump case base through a lower ejecting block. By the adoption of the technical scheme, compared with a general sliding bearing, mechanical friction contact is reduced, heat productivity is also reduced, and therefore the antithrombotic ability of a blood pump can be improved.

Description

technical field [0001] The invention belongs to the field of medical ultra-precision pumps, and in particular relates to a medical semi-magnetic levitation centrifugal pump based on steel balls. Background technique [0002] The application fields of medical centrifugal pumps mainly include extracorporeal circulation in cardiac surgery, ventricular assisted circulation, heart transplantation, extracorporeal membrane lung support, aortic surgery, liver and kidney transplantation, and extracorporeal circulation. In traditional centrifugal pumps, due to the friction at the seal of the rotor shaft, when the centrifugal pump is running at high speed, it will generate a lot of heat, which will easily lead to thrombus, and the stagnation of blood at the seal of the rotor shaft will also easily lead to thrombus. The sliding bearing used in the rotor has large mechanical friction contact and high calorific value, which is easy to cause thrombus. The present invention improves the abo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D7/04F04D13/06F04D29/00
CPCF04D7/04F04D13/06F04D29/20F05D2260/404
Inventor 查卿周艺
Owner SUZHOU INST OF BIOMEDICAL ENG & TECH CHINESE ACADEMY OF SCI
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