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Suspension permanent magnetic blood pump

A magnetic levitation and blood pump technology, applied in the field of medical devices, can solve problems such as increasing the complexity of the control system, and achieve the effects of reducing additional weight, reducing blood damage, and reducing energy consumption

Inactive Publication Date: 2010-07-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] (1) Active magnetic suspension bearings require more energy input
[0006] (2) In order to stabilize the function of the electromagnetic suspension bearing, a high-precision control structure is required, which increases the complexity of the entire control system

Method used

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  • Suspension permanent magnetic blood pump
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Embodiment Construction

[0030] The specific implementation of the present invention will be described below in conjunction with the drawings and examples.

[0031] Such as Figure 1 to Figure 5 As shown, the present invention includes a pump upper cover 1 and a suspended permanent magnet magnetic sheet 2, a pump lower cover 4, a rotor 5, a driving permanent magnetic magnetic sheet 6, an electromagnetic coil 7 and a suspended permanent magnetic magnetic ring 8; wherein:

[0032] The shape of the inner cavity of the pump cover 1 is divided into two parts: the upper truncated circular cavity 1A and the lower upper vortex channel cavity 1B. The suspended permanent magnet magnetic ring 8 has a pump inlet 9 in the center of the upper positive circular platform cavity 1A;

[0033] The shape of the inner cavity of the pump lower cover 4 is divided into two parts: the lower rounded table cavity 4A and the upper lower vortex flow channel cavity 4B. The suspended permanent magnet magnetic ring 8, the cylindri...

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Abstract

The invention discloses a suspension permanent magnetic blood pump. The invention is characterized in that a cavity of the interior of an upper pump cover consists of a perfect circular truncated cone and an upper volute runner cavity, the conical surface of the perfect circular truncated cone is embedded with a suspension permanent magnetic ring, a cavity of the interior of a lower pump cover consists of an inverted circular truncated cone and a lower volute runner cavity, the conical surface of the inverted circular truncated cone is embedded with a suspension permanent magnetic ring, a cylinder-shaped bulge of the middle of the lower pump cover is internally embedded with a magnet coil, a rotor consists of a ring fixed mount and dentation-shaped blades, wherein the perfect conical face section and the inverted conical face section of the external surface of each detation-shaped blade are respectively embedded with a suspension permanent magnetic sheet, and the cylindrical section face of the internal surface of each detation-shaped blade is respectively embedded with a driving permanent magnetic sheet. When in use, blood enters from a pump inlet, passes through the runner between the rotors through the runners between the blades, and flow towards a pump outlet along the volute runners between the upper pump cover and the lower pump cover. The invention can ensure that blood in small gap in the blood pump is timely updated and that the blood pump has less wear, small heat productivity and small power consumption.

Description

technical field [0001] The invention relates to medical equipment, in particular to a permanent magnetic levitation blood pump. Background technique [0002] At present, the bearings used in blood pumps mainly include mechanical contact bearings and non-contact bearings. Mechanical contact bearings have the problem of motor bearing wear and frictional heating that induce thrombus, which seriously restricts the development of blood pumps and their wide application in clinical practice. Therefore, non-contact bearings have become a research hotspot in modern blood pumps. [0003] Non-contact bearings are divided into active control suspension bearings, passive control suspension bearings, and hybrid bearings. Active control levitation bearings are mainly electromagnetic levitation bearings (see, for example, US Patent No. 7,470,246), which have been successfully applied to blood pumps. They mainly levitate the rotor in the pump by energizing the electromagnetic coil to gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M1/10
Inventor 阮晓东林哲邹俊傅新
Owner ZHEJIANG UNIV
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