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Hydrodynamic suspension bearing for artificial heart

A suspension bearing and artificial heart technology, applied in the direction of suction equipment, etc., can solve the problems of increasing the complexity of the control system, and achieve the effects of reducing additional weight, avoiding design, and low power consumption

Inactive Publication Date: 2009-08-26
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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  • Hydrodynamic suspension bearing for artificial heart
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Embodiment Construction

[0019] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Such as figure 1 As shown, the present invention includes a pump casing 1 and an impeller 2, a rotor 3, a stator 4, a permanent magnetic steel 7 and an electromagnetic coil 8; the rotor 3 whose inner top surface is arc-shaped is embedded in the stator 4 whose top is arc-shaped. In the groove, the ring-shaped permanent magnetic steel 7 is installed on the inner ring of the rotor 3, the electromagnetic coil 8 is fixed on the outer ring of the stator 4, the top of the stator 4 has a variable pitch helical groove 5, and the outer ring of the rotor 3 has an equal pitch Spiral groove 6, impeller 2 is installed on the top surface of rotor 3, impeller 2 is installed in pump casing 1, pump casing 1 and stator 4 are connected as one; blood flows in from pump casing inlet 10, and most of the blood flows from The outlet 9 of the pump casing flows out, and a...

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Abstract

The invention discloses a hydrodynamic suspension bearing for artificial heart. A rotor with arc inner top surface is embedded in a circular groove of stator with arc top, a circular permanent-magnet magnetic steel is arranged on the inner ring of the rotor, a electromagnetic coil is fixed on the outer ring of the stator, the top of the stator is provided with a pitch-variable helical groove, a constant-pitch helical groove is arranged on the outer ring of the stator, an impeller is arranged at the upper top of the stator and in the pump shell, the pump shell is integrated with the stator, the blood flow in from the inlet of the pump shell, most of blood flow out from the outlet of the pump shell by the rotating of the impellor, a small amount of blood form a closed loop in the clearance between the helical grooves of the rotor and the stator, the clearance between the lower surface of stator and the bottom of the rotor and clearance between the inner wall of the rotor and the stator, and is merged with the blood at the inlet. The invention has simple structure, less bearing wearing, small heating amount and power consumption, reduces the energy input of the artificial heart, thus being beneficial for the light and portable artificial heart.

Description

technical field [0001] The invention relates to a medical device, in particular to a hydraulic suspension bearing used for an artificial heart. Background technique [0002] At present, the bearings used in artificial hearts mainly include mechanical contact bearings and non-contact bearings. Mechanical contact bearings have the problem of motor bearing wear and frictional heating, which can induce thrombus. Therefore, non-contact bearings are a research hotspot in modern artificial hearts. [0003] Non-contact bearings are divided into magnetic suspension bearings, hydrodynamic suspension bearings, and hybrid bearings. Magnetic levitation bearings (for example, see Chinese patent CN200610098332.3) have been successfully applied to artificial hearts, but the complexity of the magnetic levitation blood pump motor control technology requires additional energy input, although the United States, Japan, Germany and other countries are the first to engage in this This technology...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M1/12
Inventor 阮晓东韩青邹俊林哲杨华勇
Owner ZHEJIANG UNIV
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