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Static electromagnetic pump

An electromagnetic pump, static technology, applied in electrical components, electromechanical devices, medical science, etc., can solve problems such as vibration and noise, product life limitation, damage to blood cells of pumped objects, etc., achieve good heat dissipation, easy miniaturization, Ease of Miniaturization

Inactive Publication Date: 2008-02-13
HUNAN UNIV OF HUMANITIES SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The operation of mechanical moving parts not only produces vibration and noise, but also causes damage to specific pumping objects (such as blood cells), and the service life of the product is also greatly limited by the loss of mechanical moving parts, which is used as a blood pump The field of artificial heart is a technical problem that needs to be improved urgently but has not been solved

Method used

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Experimental program
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Embodiment 1

[0037] Embodiment 1: DC static electromagnetic pump, as shown in Figure 2. In order to simplify the structure, the magnetic poles of DC pumps are generally made of permanent magnet materials. The remanence of NdFeB permanent magnet materials is above 14000 Gauss, which can meet the requirements; in order to improve the electromagnetic force, the magnetic field strength should be high. A pair of electrodes 2 and a pair of magnetic poles 1 are orthogonal in space to ensure that the direction of the current flowing through the liquid in the pump is perpendicular to the direction of the magnetic field lines, as shown in FIG. 2 . The surface of the magnetic pole should be well insulated to prevent current from flowing through the magnetic pole. The insulation is not shown in the figure.

[0038] As another example, for liquids with high resistance, in order to reduce the total resistance of the circuit, when the space position is limited, the way of multi-electrode parallel connect...

Embodiment 2

[0039] Embodiment 2: AC pulsating magnetic field pump. The axis of the excitation coil of the AC pulsating magnetic field pump should be perpendicular or nearly perpendicular to the direction of the current in the liquid in the pump, as shown in Figure 4 (the insulation is not shown). Its circuit connection is shown in Figure 5. The excitation coil 7 is connected in series with the equivalent circuit 8 formed by the electrodes and the liquid in the pump. In order to reduce the loss of the power supply voltage, an external capacitor 9 is also connected in series in the figure. 7 voltage compensation, that is, to provide inductive reactive power for the excitation coil 7, the size of the capacitor can be determined according to the power supply, when the power supply voltage is high enough, the voltage drop of the excitation coil does not affect the work of the pump, the capacitor can not be connected; When the power supply voltage is required to be added to both ends of the equ...

Embodiment 3

[0040] Embodiment 3: Use the AC pulsating magnetic field static electromagnetic pump of the present invention to make a blood pump in an artificial heart. Because the conductivity of blood is nonlinear, its impedance changes nonlinearly with the frequency of the current. Figure 6 shows the curve of the measured current changing with frequency when the voltage is 6v. It can be seen from the figure that within a certain frequency range , the impedance of blood decreases with the increase of frequency, indicating that the impedance of blood is mainly composed of resistance and capacitive reactance. When the current frequency is 2000Hz, the impedance is 25Ω, and when the frequency is 3000Hz, the impedance is 7.5Ω, indicating that the capacitive reactance is obviously greater than the resistance, and the loss generated when the current passes through the blood is not large.

[0041] Since the impedance is the smallest when the power frequency is 3000Hz, the power frequency used is ...

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Abstract

A static electromagnetic pump comprises at least a pair of magnetic poles (1) consisting of an N pole and an S pole and a pair of electrodes (2). The electrodes electrify the pumped liquid passing through a passage (3) between the pole pair, and the pumped liquid falls under the Lorentz force, moves in the direction normal to the line of magnetic force between the pole pair to be pumped. The pump body has no moving parts, and is a static pump, and does not vibrate, has no noise and is not worn when working. The pump does not damage the pumped liquid mechanically, is particularly suitable for manufacture of blood pump in artificial heart and ventricle auxiliary devices, and has long service life.

Description

technical field [0001] The invention relates to a static electromagnetic pump for pumping conductive liquid. Background technique [0002] In the prior art, regardless of whether the pumped liquid is conductive or not, mechanical pumps are used to pump the liquid, such as water pumps, oil pumps, blood pumps and the like. Oil pumps and water pumps are divided into piston pumps, centrifugal pumps, axial flow pumps, etc. according to their internal structures. In the field of artificial heart, blood pumps mainly include capsule type, diaphragm type, centrifugal type and axial flow type; the capsule type controls the push plates on both sides to squeeze the blood bag through the circuit, so as to achieve the purpose of pumping blood; the diaphragm type is similar to the piston pump The structure; the centrifugal type and the axial flow type are similar to the centrifugal pump and the axial flow pump in the water pump respectively. The size and structure of various pumps vary g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K44/02A61M1/10
Inventor 罗良才
Owner HUNAN UNIV OF HUMANITIES SCI & TECH
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