Blood passive control suspension bearing applied to implantable centrifugal blood pump

A suspension bearing and implantable technology, applied in suction devices and other directions, can solve problems such as increasing the complexity of the control system, and achieve the effect of reducing additional weight, avoiding control systems and displacement sensors, and avoiding friction and heating

Inactive Publication Date: 2009-12-16
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 magnetic suspension bearing, a high-precision control structure is required, which increases the complexity of the entire control system

Method used

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  • Blood passive control suspension bearing applied to implantable centrifugal blood pump
  • Blood passive control suspension bearing applied to implantable centrifugal blood pump
  • Blood passive control suspension bearing applied to implantable centrifugal blood pump

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Embodiment Construction

[0031] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0032] Such as figure 1 and figure 2 Shown, the present invention comprises pump casing 1 and impeller 2, stator 3, rotor 4, base 5, electromagnetic coil 6 and permanent magnetic steel 7; Have I-shaped through hole in the stator 3, open in the hole in the middle of stator 3 There are arc-shaped grooves 3A equally distributed, and the ring-shaped electromagnetic coil 6 is embedded in the hole in the middle of the stator 3, and the convex rotor 4 with the permanent magnetic steel 7 embedded in the outer ring is loaded into the hole of the stator 3 from below, and the bottom surface of the rotor 4 is located at In the large hole below the stator 3, the center of the rotor 4 has a round hole, the bottom of the rotor 4 is a trumpet-shaped hole and has evenly distributed fan-shaped slots 4B, the center of which is a trumpet-shaped base 5 is installed under ...

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Abstract

The invention discloses a blood passive control suspension bearing applied to an implantable centrifugal blood pump, which is a novel blood pump supporting device, wherein annular permanent magnet steel is arranged on a rotor, an electromagnetic coil is fixed on a stator, the top and the bottom of the stator are provided with spiral grooves, an inner ring of the stator is provided with an arc-shaped groove, the upper top surface of the rotor is provided with an impeller which is arranged in a pump shell, and the pump shell is connected with the stator and a base into an integral body; and blood flows in from the inlet of the pump shell, most of the blood flows out from the outlet of the pump shell through the rotation of the impeller, and a small amount of the blood passes through a circular hole in the center of the rotor, a gap between the lower surface of the rotor and the base, the spiral groove at the bottom of the stator, a gap between the rotor and the stator and the spiral groove on the top of the stator which form a secondary flow passage, and then converges with the blood at the outlet. The blood passive control suspension bearing has a simple structure, can ensure less bearing wear, small heat productivity and small power consumption, and is advantageous for the blood pump to be developed towards a light and portable direction.

Description

technical field [0001] The invention relates to a medical device, in particular to a blood passive control suspension bearing used in an implantable 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. Actively controlled levitation bearings are mainly magnetic levitation bearings (for example, refer to Chinese patent CN200610098332.3), which have been successfully applied to blood pumps first, and mainly suspend the rotor ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M1/12
Inventor 阮晓东林哲邹俊韩青傅新
Owner ZHEJIANG UNIV
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