CN101702569B - Device for using magnetic liquid to generate power - Google Patents

Abstract

A device that uses magnetic liquid to generate electricity, including a vertical circular tube filled with magnetic liquid, and a ring-shaped permanent magnet is arranged at each end of the vertical circular tube, and the north and south poles of the two permanent magnets are opposite to each other. The outer wall of the vertical circular tube in the middle of the permanent magnet is wound with an induction coil, and the induction coil is connected with the external load to form a loop. The bottom center of the vertical circular tube is equipped with a nozzle, and the non-magnetic object is placed in the magnetic liquid of the vertical circular tube through the nozzle. , let it do intermittent movement, causing the volume of the magnetic liquid in this area to change, and then the magnetization changes to cause the magnetic induction to change with time, the magnetic flux passing through the induction coil will change with time, and induction will occur in the induction coil The electromotive force can be used to generate electricity by using the magnetic liquid. The invention has the advantages of low cost and easy implementation, and can be applied to fields such as small generators, distributed power generation systems, and waste heat utilization.

Description

A kind of device that uses magnetic liquid to generate power

Technical field

The invention belongs to the generation of electricity by new energy technical field, particularly a kind of device that uses magnetic liquid to generate power.

Background technology

Magnetic liquid is to be suspended with single magnetic domain nano magnetic particle (＜=10nm) superparamagnetism colloidal dispersion; Surfactant three parts by magnetic-particle, base fluid and coated particle are formed, and are unique both being magnetic of artificial preparation, and mobile material is arranged again; When applying external magnetic field; The magnetic moment of nano magnetic particle will be arranged along magnetic direction and externally show magnetic in the magnetic liquid, and when externally-applied magnetic field disappeared, the confusion before the magnetic moment of particle returns to was again immediately arranged; No longer show magnetic, the application of magnetic liquid mainly contains aspects such as vacuum seal, loud speaker cooling.

Present generation of electricity by new energy mainly comprises several big type of wind-powered electricity generation, nuclear power, solar energy power generating etc.; Be suitable for extensive generating; For small-sized TRT, fuel cell and solar cell are arranged, the fuel cell technology immature development; The inefficiency of solar cell, the present device that does not also use magnetic liquid to generate power.

Summary of the invention

In order to overcome the shortcoming of above-mentioned prior art, the object of the present invention is to provide a kind of device that uses magnetic liquid to generate power, it is low to have a cost, is prone to the advantage of implementing.

In order to achieve the above object, the technical scheme of the present invention's employing is:

A kind of device that uses magnetic liquid to generate power comprises vertical tube 1, charges the liquid 2 that is magnetic in the vertical tube 1; The two ends of vertical tube 1 respectively dispose the permanent magnet 3 of an annular; The top and bottom of permanent magnet 3 are the two poles of the earth, north and south, and the south poles of two block permanent magnets 3 is put relatively, and vertical tube 1 outer wall in permanent magnet 3 centre positions is wound with induction coil 4; Induction coil 4 links to each other with the load 5 of outside and forms a loop, and the bottom centre of vertical tube 1 disposes nozzle 6.

Described permanent magnet 3 can also dispose with induction coil 4 as follows, and two block permanent magnets 3 are configured in the both sides of vertical tube 1 respectively, and two induction coils 4 are configured between permanent magnet 3 and the vertical tube 1, series connection between two induction coils 4.

A kind of device that uses magnetic liquid to generate power, its operation principle is:

Non-magnetic object 7 is placed the magnetic liquid 2 of vertical tube 1 through nozzle 6; Let it do intermittent movement; Non-magnetic object 7 can be solid also can be gas or with the immiscible liquid of magnetic liquid 2, magnetic liquid 2 is applied external magnetic field magnetizes, because the discontinuous fluid meeting of non-magnetic object 7 causes the volume of magnetic liquid 2 in this zone to change; And then the magnetization changes and causes magnetic flux density and change in time; Owing to be wound with induction coil 4 at this region exterior, the magnetic flux that passes induction coil 4 like this will change in time, based on the Faradic electricity magnetic induction principle; Induced electromotive force can be produced in the induction coil 4, magnetic liquid 2 generatings can be realized utilizing.

Because the particular design of this device, so it is low to have a cost, be prone to implement advantage, can be applicable to fields such as small generator, distributed generation system, UTILIZATION OF VESIDUAL HEAT IN.

Description of drawings

Fig. 1 is a profile of the present invention.

Fig. 2 is the profile of the another kind of arrangement of permanent magnet of the present invention and induction coil.

Embodiment

Below in conjunction with accompanying drawing the present invention is elaborated.

Referring to Fig. 1; A kind of device that uses magnetic liquid to generate power comprises vertical tube 1, charges the liquid 2 that is magnetic in the vertical tube 1; Respectively dispose the permanent magnet 3 of an annular on the outer wall of the top and the bottom of vertical tube 1; The top and bottom of permanent magnet 3 are the two poles of the earth, north and south, and the south poles of two block permanent magnets 3 is put relatively, and vertical tube 1 outer wall in permanent magnet 3 centre positions is wound with induction coil 4; Induction coil 4 links to each other with the load 5 of outside and forms a loop, and the bottom centre of vertical tube 1 disposes nozzle 6.

Referring to Fig. 2, described permanent magnet 3 can also dispose with induction coil 4 as follows, and two block permanent magnets 3 are configured in the both sides of vertical tube 1 respectively, and two induction coils 4 are configured between permanent magnet 3 and the vertical tube 1, series connection between two induction coils 4.

Referring to Fig. 1,2, a kind of device that uses magnetic liquid to generate power, its operation principle is:

Through nozzle 6 non-magnetic object 7 is placed the magnetic liquid 2 of vertical tube 1, magnetic liquid 2 transfixion in pipeline, the magnetic field between two block permanent magnets 3 is uniform magnetic field; Magnetic direction is parallel with the flow direction of non-magnetic object 7 and towards on the contrary among Fig. 1; H representes magnetic field intensity, and induction coil 4 is positioned at the centre position of two block permanent magnets 3, is wrapped on the outer wall of vertical tube 1; The number of turn is n; And link to each other with the load 5 of outside and to form a loop, the internal diameter of vertical tube 1 is d, the saturation magnetization of magnetic liquid 2 is M in the vertical tube 1 _s, outside magnetic field fails to make magnetic liquid 2 to reach before the magnetic saturation, and the magnetization of magnetic liquid 2 is relevant with the magnetic liquid temperature T with external magnetic field intensity H; Non-magnetic object 7 ascending motion in magnetic liquid 2 is when non-magnetic object 7 passes induction coil 4 place regional, because the Incoercibility of magnetic liquid; Magnetic liquid quality in this zone can change; Just the share of magnetic liquid 2 in the zone can change, and after non-magnetic object 7 left, magnetic liquid 2 was full of this zone again; Share function in time in the zone on magnetic liquid 2 cross sections in office is α (t)

When the outside is an adiabatic condition, there is not the heat input, the temperature of magnetic liquid does not change in the whole process, analyzes with Faraday's electromagnetic induction law, and wherein the symbol of magnetic flux density is B, and the calculating formula of magnetic flux density is B=μ in the magnetizing mediums ₀(M+H), μ ₀Be permeability of vacuum.

When not having non-magnetic object 7, the magnetic flux in the induction coil is:

Φ＝BS＝μ ₀(M+H)πd ²/4

Temperature T is constant, and H is constant for external magnetic field intensity, and the magnetization M of magnetic liquid 2 is constant, and the magnetic flux Φ in the induction coil 4 is also constant, and d Φ/dt=0 does not have induced electromotive force production in the induction coil 4, does not also just have induced current to produce;

When having non-magnetic object 7 to flow through, the magnetization that then has the subregion in the induction coil 4 is zero, and the whole magnetization will reduce, and thus, can obtain the calculating formula of arbitrary cross section magnetic flux in a certain moment induction coil:

Φ＝BS＝μ ₀(M+H)απd ²/4+μ ₀H(1-α)πd ²/4

Pass in the process of induction coil at non-magnetic object 7; Magnetic liquid 2 is time dependent at the share α of each cross section; That is to say that the magnetic flux Φ in the induction coil is time dependent, the time rate of change of magnetic flux is non-vanishing in the coil, can be known in the coil by the Faradic electricity magnetic induction principle to produce induced electromotive force; Itself and coil turn and flux change rate have relation, and the size of induced electromotive force e can be obtained by computes:

$e=n\frac{\mathrm{d\&Phi;}}{\mathrm{dt}}=-\frac{\&PartialD;\mathrm{\&alpha;}}{\&PartialD;t}n{\mathrm{\&mu;}}_0\mathrm{M\&pi;}{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="H200910219307XE00011.png,H200910219307XE00012.png"\; state="\{\{state\}\}">d</figure-callout>}}^2/4$

The magnetization of induced electromotive force and coil turn, magnetic liquid and the share of magnetic liquid rate over time are directly proportional, and with the diameter of pipeline relation are arranged;

When external condition is diabatic, flow to be unstable state, the size of induced potential e is also with relevant with the time rate of change of temperature so.

From the angle analysis of the conservation of energy, the kinetic energy of non-magnetic object 7 is converted to for electric energy in the magnetic liquid 2.

In the accompanying drawing: 1 is vertical tube; 2 is magnetic liquid; 3 is permanent magnet; 4 is induction coil; 5 are load; 6 is nozzle; 7 is non-magnetic object; S, N represent the two poles of the earth of permanent magnet; H representes magnetic field intensity.

Claims (2)

1. A device for generating electricity using a magnetic liquid, comprising a vertical circular tube (1), characterized in that the vertical circular tube (1) is filled with a magnetic liquid (2), and the two ends of the vertical circular tube (1) are respectively configured There is an annular permanent magnet (3), the upper and lower sides of the permanent magnet (3) are north and south poles, the north and south poles of the two permanent magnets (3) are opposite to each other, and the vertical circular tube (1) in the middle of the permanent magnet (3) ) is wound with an induction coil (4), and the induction coil (4) is connected with an external load (5) to form a loop, and a nozzle (6) is arranged at the center of the bottom of the vertical tube (1), and in the magnetic liquid (2) A non-magnetic object (7) with discontinuous motion is provided. 2. A device for generating electricity using a magnetic liquid, comprising a vertical circular tube (1), characterized in that the vertical circular tube (1) is filled with a magnetic liquid (2), and two permanent magnets (3) are respectively arranged in vertical On both sides of the round pipe (1), two induction coils (4) are arranged between the permanent magnet (3) and the vertical round pipe (1), and the two induction coils (4) are connected in series, and the induction coils (4) and External loads (5) are connected to form a loop, a nozzle (6) is arranged at the center of the bottom of the vertical circular tube (1), and a non-magnetic object (7) in discontinuous motion is arranged in the magnetic liquid (2).

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