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Mixed type passive suspended centrifugal blood pump

A hybrid and passive technology, applied in the field of medical devices, can solve problems such as increasing the complexity of the control system, achieve the effects of reducing additional weight, low energy consumption, and avoiding frictional heating

Inactive Publication Date: 2010-04-21
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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  • Mixed type passive suspended centrifugal blood pump
  • Mixed type passive suspended centrifugal blood pump
  • Mixed type passive suspended centrifugal blood pump

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Embodiment Construction

[0031] The specific implementation of the present invention will be described below in conjunction with the drawings and examples.

[0032] Such as Figure 1 to Figure 6 As shown, the present invention includes a housing 1 and a suspended permanent magnet ring 2, a rotor 3, an electromagnetic coil 4, a drive permanent magnet ring 5 and a suspended permanent magnet magnetic sheet 6; wherein:

[0033] The shape of the inner cavity of the shell 1 is composed of two parts: the upper frustum cavity 1A and the lower inverted frustum cavity 1B. The upper frustum cavity 1A is embedded with a positive conical suspension The permanent magnetic ring 2, the lower rounded table cavity 1B is embedded with an electromagnetic coil 4 in the shape of an inverted cone, the upper part of the upper round table cavity 1A has a pump inlet 7, and the lower rounded table cavity There is a pump outlet 8 at the lower part of 1B;

[0034] The lower end of the rotor 3 is an inverted conical ring with th...

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Abstract

The invention discloses a mixed type passive suspended centrifugal blood pump. A shell cavity body consists of a positively cylindrical cavity and an inversely cylindrical cavity, wherein the positively cylindrical conical surface is embedded with a suspended permanently magnetic ring, and the inversely cylindrical conical surface is embedded with an electromagnetic coil; an inverse cone-shaped circular ring at the lower end of a rotor is embedded with a driving permanently magnetic ring, an upper part and a lower part of an outer surface of the inverse cone-shaped circular ring are provided with a spiral flow guiding groove respectively, and an inner surface of the inverse cone-shaped circular ring is provided with two inverse cone-shaped spiral guiding blades at equal intervals along the circumferential direction; and the upper end of the rotor is provided with cone-shaped circular ring segments at equal intervals along the circumferential direction, and each cone-shaped circular ring segment is embedded with a suspended permanently magnetic plate. When the blood pump works, the blood flows in from an entrance, and flows to an exit through the spiral guiding blades and the central holes of the spiral guiding blades, and a small part of blood at the exist flows through a gap between the rotor and the inner surface of the shell and the space between the cone-shaped circular ring segments and joins the blood at the entrance under the action of the pressure difference between the entrance and the exit and the upward spiral flow guiding groove and the down ward spiral flow guiding groove on the outer surface of the rotor. The blood pump has the advantages of less abrasion, less heat production and lower energy consumption.

Description

technical field [0001] The invention relates to medical equipment, in particular to a hybrid passive suspension centrifugal 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 ...

Claims

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Application Information

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