CN101702569A - Method for using magnetic liquid to generate power - Google Patents

Abstract

The invention relates to a method for using magnetic liquid to generate power, comprising a vertical round pipe, the magnetic liquid is firstly filled in the vertical round tube, and then two ring-shaped permanent magnets are respectively arranged at two ends of the vertical round tube, and the south and north poles of the two permanent magnets are arranged oppositely, and then induction coils are wound on the outer wall of the vertical round tube at the central position of the permanent magnet and are connected with an external load to form a return circuit, a nozzle is arranged at the center of the bottom part of the vertical round pipe, and a non-magnetic object is arranged in the magnetic liquid of the vertical round tube by the nozzle, so as to lead the non-magnetic object to move intermittently; as the volume of the magnetic liquid in the area is changed, the magnetization intensity is changed, so as to lead the magnetic induction density to be changed along with time, the magnetic flux penetrates through the induction coils is changed along with time, induced electromotive force can be generated in the induction coils, thereby obtaining power generation of one generating unit; the method has the advantages of low cost and easy operation and can be applied to the field of small power generators, distributive power generating systems and waste heat utilization and the like.

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, by magnetic-particle, surfactant three parts of base fluid and coated particle are formed, be unique both being magnetic of artificial preparation, 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, when externally-applied magnetic field disappears, confusion before the magnetic moment of particle returns to is again immediately arranged, no longer show magnetic, the application of magnetic liquid mainly contains vacuum seal, aspects such as loud speaker cooling.

Present generation of electricity by new energy mainly comprises several big classes such as wind-powered electricity generation, nuclear power, solar energy power generating, be suitable for extensive generating, for small-sized Blast Furnace Top Gas Recovery Turbine Unit (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, easily the advantage of implementing.

In order to achieve the above object, the technical solution used in the present invention is:

A kind of device that uses magnetic liquid to generate power, comprise vertical tube 1, charge 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 and induction coil 4 all right following configurations, 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 by nozzle 6, allow 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 to be magnetized, 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, easily 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

The present invention is described in detail below in conjunction with accompanying drawing.

Referring to Fig. 1, a kind of device that uses magnetic liquid to generate power, comprise vertical tube 1, charge 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, the south poles of two block permanent magnets 3 is put relatively, 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 and induction coil 4 all right following configurations, 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:

Non-magnetic object 7 is placed the magnetic liquid 2 of vertical tube 1 by nozzle 6, magnetic liquid 2 transfixion in pipeline, 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 represents magnetic field intensity, induction coil 4 is positioned at the centre position of two block permanent magnets 3, be 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, and the saturation magnetization of magnetic liquid 2 is M in the vertical tube 1 _sOutside magnetic field fails to make magnetic liquid 2 to reach before the magnetic saturation, 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, when non-magnetic object 7 passes induction coil 4 places 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, after non-magnetic object 7 leaves, magnetic liquid 2 is full of this zone again, and the 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 know that by the Faradic electricity magnetic induction principle meeting produces induced electromotive force in the coil, itself and coil turn and flux change rate have relation, and the size of induced electromotive force e can be calculated by following formula:

$e=n\frac{\mathrm{d\&Phi;}}{\mathrm{dt}}=-\frac{\&PartialD;\mathrm{\&alpha;}}{\&PartialD;t}n{\mathrm{\&mu;}}_0\mathrm{M\&pi;}{\mathrm{<figure-callout\; id="2"\; label="d"\; filenames="H200910219307XE0000011.png"\; state="\{\{state\}\}">d</figure-callout>}}^2/4$

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 represents magnetic field intensity.

Claims (2)

1. device that uses magnetic liquid to generate power, comprise vertical tube (1), it is characterized in that, charge the liquid that is magnetic (2) 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, the south poles of two block permanent magnets (3) is put relatively, vertical tube (1) outer wall in permanent magnet (3) centre position 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).

2. a kind of device that uses magnetic liquid to generate power according to claim 1, it is characterized in that, described permanent magnet (3) and all right following configuration of induction coil (4), two block permanent magnets (3) are configured in the both sides of vertical tube (1) respectively, two induction coils (4) are configured between permanent magnet (3) and the vertical tube (1), series connection between two induction coils (4).

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