CN105141107A - Annular channel liquid metal magnetohydrodynamic generator - Google Patents
Annular channel liquid metal magnetohydrodynamic generator Download PDFInfo
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Abstract
The invention provides an annular channel liquid metal magnetohydrodynamic generator of which an annular magnetohydrodynamic generation cahnnel (2) penetrates through a magnet annular magnetic hole (1-3); and magnetohydrodynamic channel transition segments (6-1, 6-2) are symmetrically connected at the two ends of the annular magnetohydrodynamic generation cahnnel (2). The other end of the first magnetohydrodynamic channel transition segment (6-1) is connected with a first piston cylinder (7-1). The other end of the second magnetohydrodynamic channel transition segment (6-2) is connected with a second piston cylinder (7-2). A first piston (8-1) is coaxially arranged in the first piston cylinder (7-1). A second piston (8-2) is coaxially arranged in the second piston cylinder (7-2) A sealed communicating space is formed by the pistons, the piston cylinders, the magnetohydrodynamic channel transition segments and the annular magnetohydrodynamic generation channel (2), and the communicating space is fully filled with liquid metal (9). Liquid metal (9) flows along an axial direction in the annular magnetohydrodynamic generation channel (2) so that radial magnetic lines of force are cut and tangential induced current is generated.
Description
Technical field
The present invention relates to a kind of liquid-metal MHD generator, particularly a kind of liquid-metal MHD generator adopting annular power channel.
Background technology
Novel liquid metal magnetic fluid (LiquidMetalMagnetohydrodynamics, LMMHD) generator adopts alternately external force, as automobile internal power and wave force, and Direct driver liquid metal linear reciprocating motion in power channel, cutting magnetic line, produces AC energy.Compared with traditional LMMHD electricity generation system, as two phase flow electricity generation system and single phase flow electricity generation system, novel LMMHD generator adopts Direct driver and single-phase liquid metal generating working medium, the good conductivity of maintenance work fluid is carried out without the need to extra energy and equipment, structure is simple, power density is large, and efficiency is high, therefore has wide practical use in hybrid vehicle, distributed power supply power supply and wave energy direct generation of electricity system.
The power channel of novel LMMHD generator is generally rectangle, its load voltage U
l=Bubk, load current I
l=BuaL σ (1-k), generator internal resistance R
g=b/ (aL σ), B is applied field strengths, and u is the average speed of liquid metal in power channel, and b is electrode spacing, and a is electrode width (i.e. effective yoke distance), and L is electrode length, and σ is liquid metal conductivity, R
lfor load resistance, k=R
l/ (R
l+ R
g) be load factor.The conductivity of liquid metal is 10
6s/m; U is 10
1m/s, a and b are generally 10
-1m, L are 10
-1~ 10
0m, B are 10
0t, then R
gbe 10
-5~ 10
-6Ω, I
lbe 10
5~ 10
7a, U
lbe 10
0v.Thus, novel LMMHD generator has the output characteristic of low-voltage, big current, far different than the output characteristic of conventional electric generators.
For power consumption equipment, as underwater robot, various transducer and sonar set, need stable DC or AC, operating voltage is generally 10
0~ 10
2v, operating current is 10
0~ 10
2a; Internal resistance is all even higher in ohm level, does not mate, need by electrical conversion systems with the internal resistance pole of novel LMMHD generator, and the low pressure exported, the AC energy of big current convert the regulated power that user needs to.But the minimum conducting voltage of current power electronic device is about 0.7V, the maximum current of energy conducting is 8320A, far can not meet the requirement directly output of novel LMMHD generator being carried out to transformation of electrical energy.On the one hand, corresponding novel power transistor need be researched and developed for the output characteristic of novel LMMHD generator; On the other hand, design need be optimized to improve output voltage, to reduce output current to novel LMMHD generator, meet the performance of current power electronic device.
Chinese patent 200610144400.5 adopts binary channels, United States Patent (USP) 0146140A1 to adopt the mode of multi-channel transmit electric unit series connection to increase generator internal resistance and output voltage, reduction output current.But the series connection of multiple power channel not only increases the volume of Blast Furnace Top Gas Recovery Turbine Unit (TRT), cost and cost, and increases the voltage loss of contact resistance and wiring, and the ability improving output voltage is very limited.In addition, the synchronism that multiple generator unit exports also is thing followed problem.
Summary of the invention
For overcoming the shortcoming of prior art, the present invention proposes a kind of circular passage liquid-metal MHD generator.Circular passage liquid-metal MHD generator adopts radial section to be annular channel design, axial direction in conjunction with radial uniform magnetic field and liquid metal flows, to improve generator internal resistance and output voltage, namely reduce low-voltage, big current alternating current to the conversion difficulty stablizing available electrical energy; And avoid because the connect contact resistance that brings and wiring loss of multichannel becomes the problem such as large; Reduce difficulty of processing and the cost of device.
Object of the present invention is achieved through the following technical solutions.
Circular passage of the present invention liquid-metal MHD generator is by magnet outer magnetic pole, internal magnetic pole, annular bore, annular magnetic fluid power-generation passage, first current stabilization cone, the second current stabilization cone, first plate electrode, the second plate electrode, electrode dielectric layer, the first magnetic fluid channel transition section, the second magnetic fluid changeover portion, first piston cylinder, the second piston cylinder, first piston, the second piston, and liquid metal composition; Annular magnetic fluid power-generation passage is through magnet annular bore; First magnetic fluid channel transition section and the second magnetic fluid channel transition section symmetry are connected to the two ends of annular magnetic fluid power-generation passage, the other end of the first magnetic fluid channel transition section is connected with first piston cylinder, and the other end of the second magnetic fluid channel transition section is connected with the second piston cylinder; Coaxially arranged in first piston cylinder have first piston, and coaxially arranged in the second piston cylinder have the second piston; First piston, the second piston, first piston cylinder, the second piston cylinder, the first magnetic fluid channel transition section, the second magnetic fluid channel transition section, and annular magnetic fluid power-generation passage forms an airtight connected space, is full of liquid metal in described connected space; Liquid metal flows vertically at annular magnetic fluid power-generation passage, cutting magnetic line, and magnetic direction is radial, produces tangential induced current.
Described magnet is made up of outer magnetic pole, internal magnetic pole and annular bore, produces axisymmetric radial uniform magnetic field in annular bore.Annular bore, between outer magnetic pole and internal magnetic pole, is made up of the outer magnetic pole of annular and the annular internal magnetic pole coaxially arranged with outer magnetic pole.The axial two ends of internal magnetic pole are connected with two current stabilization cones respectively.
Annular magnetic fluid power-generation passage is through the annular bore of magnet, and in annular magnetic fluid power-generation passage, m non-magnetic non-conductive circular bar shape support is radially evenly fixed in center, m>1.Described support annularly magnetohydrodynamic generation passage extends radially out, and two ends are separately fixed on internal magnetic pole and outer magnetic pole.The radial section of annular magnetic fluid power-generation passage is annular, is radially built-in with the first plate electrode and the second plate electrode.The axial two ends symmetry of annular magnetic fluid power-generation passage connects the first magnetic fluid channel transition section and the second magnetic fluid changeover portion.Annular magnetic fluid power-generation passage adopts non-magnetic non-conducting material to make.
First plate electrode and the second plate electrode are radially fixed in annular magnetic fluid power-generation passage, the width of the first plate electrode and the second plate electrode is all equal with the radial width of annular magnetic fluid power-generation passage, and the axial length of the first plate electrode and the second plate electrode is equal with the axial length of annular magnetic fluid power-generation passage.Two plate electrodes all have one side and liquid metal contacts, are the contact-making surface with liquid metal.Two plate electrodes and liquid metal form the ring current guiding path of the first plate electrode-liquid metal-the second plate electrode.Electrode dielectric layer is provided with between first plate electrode and the second plate electrode in opposite directions two and the noncontact face of liquid metal, and the radial angle α <10 ° in two noncontact faces.Electrode adopts electric conducting material to make.
The radial section of electrode dielectric layer is fan-shaped, and electrode dielectric layer is between the first plate electrode and the second plate electrode two and liquid metal noncontact face.Electrode dielectric layer adopts non-magnetic non-conducting material to make.
First current stabilization cone and the second current stabilization cone adopt non-magnetic non-conducting material to make, and symmetry is connected in the axial both ends of magnet internal magnetic pole.First current stabilization cone and the second current stabilization cone form an inner prop cone together with the internal magnetic pole of magnet.
First magnetic fluid channel transition section is positioned between annular magnetic fluid power-generation passage and first piston cylinder, and the second magnetic fluid channel transition section is positioned between annular magnetic fluid power-generation passage and the second piston cylinder; The two ends of the first magnetic fluid channel transition section are connected with annular magnetic fluid power-generation passage and first piston cylinder respectively, and the two ends of the second magnetic fluid channel transition section are connected with the second piston cylinder with annular magnetic fluid power-generation passage respectively; From piston cylinder end to annular magnetic fluid power-generation tunnel ends, the radial section of magnetic fluid channel transition section becomes annular from circle, the radius of magnetic fluid channel transition section radial section diminishes gradually, and the radius near the magnetic fluid channel transition section radial section of annular magnetic fluid power-generation tunnel ends is minimum; Magnetic fluid channel transition section adopts insulating material to make.
First piston cylinder and the second piston cylinder are cylindrical, and coaxially arranged in first piston cylinder have the first piston that can move up and down, and coaxially arranged in the second piston cylinder have second piston that can move up and down; First piston cylinder, the second piston cylinder, first piston and the second piston all adopt insulating material to make.
Liquid metal is low-melting-point metal or alloy, and described low-melting-point metal or alloy refer to that fusing point is lower than the fusible metal of 232 DEG C or alloy.
When reciprocal external force, as automobile internal power or wave force promote first piston and the second piston move to the other end time, liquid metal is squeezed with the axis direction motion of speed v annularly magnetohydrodynamic generation passage, cutting magnetic line.Magnetic direction is radial, according to the right-hand rule, produces tangential induced current I.Be connected load by the first plate electrode with the second plate electrode and export electric energy.
The internal resistance R of circular passage of the present invention liquid-metal MHD generator
g1=3.14 (b-a)/aL σ, floating voltage U
1=B × 3.14 (b-a) × v, b is circular passage external diameter, a is electrode radical length, i.e. effective yoke distance, b-2a is circular passage internal diameter, 3.14 × (b-a) is electrode spacing, L is electrode length, wherein, and two angle α <10 ° between plate electrode and the noncontact face of liquid metal, therefore, have ignored the space of the circular passage shared by electrode when calculating annular channel electrode spacing, B is magnetic flux density, and v is liquid metal axial velocity in circular passage, σ is liquid metal conductivity, U
1for floating voltage.Identical effective yoke distance, magnet pole widths, electrode length with under identical liquid metal flow velocity, square-section liquid-metal MHD generator internal resistance R
g2=b/ (aL σ), floating voltage U
2=Bbv.Can be obtained by circular passage internal diameter b-2a>0, R
g1/ R
g2>1.57, U
1/ U
2>1.57.
Visible, the present invention adopts radial section to be annular channel design, axial direction in conjunction with radial magnetic field and liquid metal flows, and improves generator internal resistance and output voltage, namely reduces by the alternating current of big current, low-voltage to the difficulty stablizing available electrical energy conversion.
Further, present invention reduces in the liquid-metal MHD generator of common square-section, the transition of circular cross-section magnetic fluid channel transition section is connected to the difficulty of processing of square-section power channel, can reduce apparatus cost to a certain extent.
The current stabilization cone at the axial two ends of internal magnetic pole of the present invention, avoids the direct impact of liquid metal internal pole plane end face and the unstable situation in flow field that produces.
Accompanying drawing explanation
Fig. 1 is specific embodiment of the invention circular passage liquid-metal MHD generator schematic three dimensional views, in figure: 1-1 magnet outer magnetic pole, 1-2 magnet internal magnetic pole, 1-3 annular bore, 2 annular magnetic fluid power-generation passages, 3-1 first current stabilization cone, 3-2 second current stabilization cone, 4-1 first is dull and stereotyped, 4-2 second plate electrode, 5 electrode dielectric layers, 6-1 first magnetic fluid channel transition section, 6-2 second magnetic fluid channel transition section, 7-1 first piston cylinder, 7-2 second piston cylinder, 8-1 first piston, 8-2 second piston, 9 liquid metals, 10 supports;
Fig. 2 a is specific embodiment of the invention circular passage liquid-metal MHD generator front view;
Fig. 2 b is liquid-metal MHD generator center, specific embodiment of the invention circular passage longitudinal section view;
Fig. 3 a is the ring section access diagram of specific embodiment of the invention circular passage liquid-metal MHD generator;
Fig. 3 b is the square-section access diagram that Fig. 3 a is corresponding;
Fig. 3 c is the floating voltage curve over time of ring section passage and square-section passage generator.
Embodiment
The present invention is further illustrated below in conjunction with the drawings and specific embodiments.
Fig. 1 is embodiment of the present invention circular passage liquid-metal MHD generator schematic three dimensional views, liquid-metal MHD generator center radially section.Fig. 2 a is embodiment of the present invention circular passage liquid-metal MHD generator front view, and Fig. 2 b is embodiment of the present invention circular passage liquid-metal MHD generator longitudinal section view.As shown in Figure 1, Figure 2 shown in a and Fig. 2 b, annular magnetic fluid power-generation passage 2 is through magnet annular bore 1-3; First magnetic fluid channel transition section 6-1 and the second magnetic fluid channel transition section 6-2 symmetry is connected to the two ends of annular magnetic fluid power-generation passage 2, the other end of the first magnetic fluid channel transition section 6-1 is connected with first piston cylinder 7-1, and the other end of the second magnetic fluid channel transition section 6-2 is connected with the second piston cylinder 7-2; Coaxially arranged in first piston cylinder 7-1 have first piston 8-1, and coaxially arranged in the second piston cylinder 7-2 have the second piston 8-2; First piston 8-1, the second piston 8-2, first piston cylinder 7-1, the second piston cylinder 7-2, the first magnetic fluid channel transition section 6-1, the second magnetic fluid channel transition section 6-2, and annular magnetic fluid power-generation passage 2 forms an airtight connected space, is full of liquid metal 9 in described connected space; Liquid metal 9 flows vertically at annular magnetic fluid power-generation passage 2, cutting magnetic line, and magnetic direction is radial, produces tangential induced current.
Described magnet is made up of outer magnetic pole 1-1, internal magnetic pole 1-2 and annular bore 1-3, produces axisymmetric radial uniform magnetic field in annular bore 1-3.Bore 1-3 is between outer magnetic pole 1-1 and internal magnetic pole 1-2 for annular, is made up of the outer magnetic pole 1-1 of annular and the annular internal magnetic pole 1-2 coaxially arranged with outer magnetic pole.The axial two ends of internal magnetic pole 1-2 are connected with the first current stabilization cone 3-1 and the second current stabilization cone 3-2 respectively.
Annular magnetic fluid power-generation passage 2 is through the annular bore 1-3 of magnet, in annular magnetic fluid power-generation passage 2, m non-magnetic non-conductive circular bar shape support 10 is radially evenly fixed in center, m>1, support 10 annularly magnetohydrodynamic generation passage 2 extends radially out, and the two ends of support 10 are separately fixed on outer magnetic pole 1-1 and internal magnetic pole 1-2.The radial section of annular magnetic fluid power-generation passage 2 is annular, is radially built-in with the first plate electrode 4-1 and the second plate electrode 4-2.The axial two ends symmetry of annular magnetic fluid power-generation passage 2 connects the first magnetic fluid channel transition section 6-1 and the second magnetic fluid changeover portion 6-2.Annular magnetic fluid power-generation passage 2 adopts non-magnetic non-conducting material to make.
First plate electrode 4-1 and the second plate electrode 4-2 is radially fixed in annular magnetic fluid power-generation passage 2, the width of the first plate electrode 4-1 and the second plate electrode 4-2 is all equal with the radial width of annular magnetic fluid power-generation passage 2, and the axial length of the first plate electrode 4-1 and the second plate electrode 4-2 is equal with the axial length of annular magnetic fluid power-generation passage 2.Two plate electrodes all have one side to contact with liquid metal 9, are the contact-making surface with liquid metal 9.Two plate electrodes and liquid metal 9 form the ring current guiding path of first plate electrode 4-1-liquid metal 9-the second plate electrode 4-2.Electrode dielectric layer 5 is provided with between first plate electrode 4-1 and the second plate electrode 4-2 in opposite directions two and the noncontact face of liquid metal 9, and the radial angle α <10 ° in two noncontact faces.Electrode 5 adopts electric conducting material to make.
The radial section of electrode dielectric layer 5 is fan-shaped, and electrode dielectric layer 5 is between two of the first plate electrode 4-1 and the second plate electrode 4-2 and liquid metal 9 noncontact face.Electrode dielectric layer 5 adopts non-magnetic non-conducting material to make.
First current stabilization cone 3-1 and the second current stabilization cone 3-2 adopts non-magnetic non-conducting material to make, and symmetry is connected in the axial both ends of magnet internal magnetic pole 1-2.First current stabilization cone 3-1 and the second current stabilization cone 3-2 forms an inner prop cone together with the internal magnetic pole 1-2 of magnet.
First magnetic fluid channel transition section 6-1 is between annular magnetic fluid power-generation passage 2 and first piston cylinder 7-1, and the second magnetic fluid changeover portion 6-2 is between annular magnetic fluid power-generation passage 2 and the second piston cylinder 7-2.The two ends of the first magnetic fluid channel transition section 6-1 are connected with annular magnetic fluid power-generation passage 2 and first piston cylinder 7-1 respectively, and the two ends of the second magnetic fluid changeover portion 6-2 are connected with the second piston cylinder 7-2 with annular magnetic fluid power-generation passage 2 respectively.From piston cylinder 7 end to annular magnetic fluid power-generation passage 2 end, the radial section of magnetic fluid channel transition section 6 becomes annular from circle, the radius of magnetic fluid channel transition section 6 radial section diminishes gradually, and the radius near magnetic fluid channel transition section 6 radial section of annular magnetic fluid power-generation passage 2 end is minimum.Magnetic fluid channel transition section 2 adopts insulating material to make.
First piston cylinder 7-1 and the second piston cylinder 7-2 piston cylinder are cylindrical, and coaxially arranged in first piston cylinder 7-1 have can first piston 8-1 moving up and down, coaxially arranged the second piston 8-2 likely enough moved up and down in the second piston cylinder 7-2; First piston cylinder 7-1 and the second piston cylinder 7-2, first and piston 8-1 and the second piston 8-2 all adopt insulating material to make.
Liquid metal 9 is low-melting-point metal or alloy, and described low-melting-point metal or alloy refer to that fusing point is lower than the fusible metal of 232 DEG C or alloy.
When reciprocal external force, as automobile internal power or wave force promote first piston 8-1 and the second piston 8-2 move to the other end time, liquid metal 9 is squeezed with the axis direction motion of speed v annularly magnetohydrodynamic generation passage 2, cutting magnetic line.Magnetic direction is radial, according to the right-hand rule, produces tangential induced current I.Be connected load by the first plate electrode 4-1 with the second plate electrode 4-2 and export electric energy.
Fig. 3 a is specific embodiment of the invention ring section access diagram.As shown in Figure 3 a, b is circular passage external diameter, and a is electrode radical length, i.e. effective yoke distance, b-2a is circular passage internal diameter, and 3.14 × (b-a) is electrode spacing, L is electrode length, wherein, two angle α <10 ° between electrode and the noncontact face of liquid metal, therefore, the space of the circular passage shared by electrode is have ignored when calculating annular channel electrode spacing, B is magnetic flux density, and v is liquid metal axial velocity in circular passage, U
1for being floating voltage.
Fig. 3 b is the square-section access diagram having identical effective yoke distance, magnet pole widths, electrode length and liquid metal flow velocity with Fig. 3 a.As shown in Figure 3 b, b is electrode spacing, and a is electrode width, i.e. effective yoke distance, and L is electrode length, and B is magnetic flux density, and v is liquid metal speed, U
2for floating voltage;
Suppose a=5mm, b=50mm, L=100mm, B=1T, v=20m/s, liquid metal conductivityσ=3.4 × 10
6s/m, then the internal resistance of circular passage liquid-metal MHD generator and floating voltage are respectively R
g1=83.1 μ Ω and U
1=2.8261V, at identical effective yoke distance, magnet pole widths, electrode length with under identical liquid metal flow velocity, the internal resistance of corresponding rectangular channel liquid-metal MHD generator and floating voltage are respectively R
g2=29.4 μ Ω and U
2=1V, now, circular passage LMMHD generator internal resistance and floating voltage are 2.826 times of rectangular channel.
Fig. 3 c is the floating voltage curve over time of ring section passage and square-section passage generator.As shown in Figure 3 c, abscissa is time t, and ordinate is floating voltage U, and herein, suppose external force in time by sinusoidal rule change, no-load voltage waveform is consistent with external force waveform.
Claims (9)
1. a circular passage liquid-metal MHD generator, it is characterized in that: described generator is by magnet outer magnetic pole (1-1), internal magnetic pole (1-2), annular bore (1-3), annular magnetic fluid power-generation passage (2), first current stabilization cone (3-1), second current stabilization cone (3-2), first plate electrode (4-1), second plate electrode (4-2), electrode dielectric layer (5), first magnetic fluid channel transition section (6-1), second magnetic fluid changeover portion (6-2), first piston cylinder (7-1), second piston cylinder (7-2), first piston (8-1), second piston (8-2), and liquid metal (9) composition, annular magnetic fluid power-generation passage (2) is through magnet annular bore (1-3), first magnetic fluid channel transition section (6-1) and the second magnetic fluid channel transition section (6-2) symmetry are connected to the two ends of annular magnetic fluid power-generation passage (2), the other end of the first magnetic fluid channel transition section (6-1) is connected with first piston cylinder (7-1), and the other end of the second magnetic fluid channel transition section (6-2) is connected with the second piston cylinder (7-2), coaxially arranged in first piston cylinder (7-1) have first piston (8-1), and coaxially arranged in the second piston cylinder (7-2) have the second piston (8-2), first piston (8-1), the second piston (8-2), first piston cylinder (7-1), the second piston cylinder (7-2), the first magnetic fluid channel transition section (6-1), the second magnetic fluid channel transition section (6-2), and the connected space that annular magnetic fluid power-generation passage (2) formation one is airtight, be full of liquid metal (9) in described connected space, liquid metal (9) flows vertically at annular magnetic fluid power-generation passage (2), cutting magnetic line, and magnetic direction is radial, produces tangential induced current.
2. by circular passage according to claim 1 liquid-metal MHD generator, it is characterized in that: magnet is made up of outer magnetic pole (1-1), internal magnetic pole (1-2) and annular bore (1-3), in annular bore (1-3), produce axisymmetric radial uniform magnetic field; Annular bore (1-3) is positioned between outer magnetic pole (1-1) and internal magnetic pole (1-2), is made up of the outer magnetic pole (1-1) of annular and the annular internal magnetic pole (1-2) coaxially arranged with outer magnetic pole; The axial two ends of internal magnetic pole (1-2) are connected with the first current stabilization cone (3-1) and the second current stabilization cone (3-2) respectively.
3., by circular passage according to claim 1 liquid-metal MHD generator, it is characterized in that: annular magnetic fluid power-generation passage (2) is through the annular bore (1-3) of magnet; M non-magnetic non-conductive circular bar shape support (10) is radially evenly fixed in annular magnetic fluid power-generation passage (2) interior center, m>1; Support (10) annularly magnetohydrodynamic generation passage (2) extends radially out, and the two ends of support (10) are separately fixed on outer magnetic pole (1-1) and internal magnetic pole (1-2); The radial section of annular magnetic fluid power-generation passage (2) is annular, is radially built-in with the first plate electrode (4-1) and the second plate electrode (4-2); The axial two ends symmetry of annular magnetic fluid power-generation passage (2) connects the first magnetic fluid channel transition section (6-1) and the second magnetic fluid changeover portion (6-2); Annular magnetic fluid power-generation passage (2) adopts non-magnetic non-conducting material to make.
4. by circular passage according to claim 1 liquid-metal MHD generator, it is characterized in that: the first plate electrode (4-1) and the second plate electrode (4-2) are radially fixed in annular magnetic fluid power-generation passage (2), the width of the first plate electrode (4-1) and the second plate electrode (4-2) is all equal with the radial width of annular magnetic fluid power-generation passage (2), and the axial length of the first plate electrode (4-1) and the second plate electrode (4-2) is equal with the axial length of annular magnetic fluid power-generation passage (2); Two plate electrodes all have one side to contact with liquid metal (9), are the contact-making surface with liquid metal (9); Two plate electrodes and liquid metal (9) form the ring current guiding path of the first plate electrode (4-1)-liquid metal (9)-second plate electrode (4-2); Electrode dielectric layer (5) is provided with between first plate electrode (4-1) and the second plate electrode (4-2) in opposite directions two and the noncontact face of liquid metal (9), and the radial angle α <10 ° in two noncontact faces; Electrode (5) adopts electric conducting material to make.
5. by circular passage according to claim 1 liquid-metal MHD generator, it is characterized in that: the radial section of electrode dielectric layer (5) is fan-shaped, electrode dielectric layer (5) is positioned between two of the first plate electrode (4-1) and the second plate electrode (4-2) and liquid metal (9) noncontact face; Electrode dielectric layer (5) adopts non-magnetic non-conducting material to make.
6. by circular passage according to claim 1 liquid-metal MHD generator, it is characterized in that: the first current stabilization cone (3-1) and the second current stabilization cone (3-2) adopt non-magnetic non-conducting material to make, and symmetry is connected in the axial both ends of magnet internal magnetic pole (1-2); First current stabilization cone (3-1) and the second current stabilization cone (3-2) form an inner prop cone together with the internal magnetic pole (1-2) of magnet.
7. by circular passage according to claim 1 liquid-metal MHD generator, it is characterized in that: the first magnetic fluid channel transition section (6-1) is positioned between annular magnetic fluid power-generation passage (2) and first piston cylinder (7-1), the second magnetic fluid channel transition section (6-2) is positioned between annular magnetic fluid power-generation passage (2) and the second piston cylinder (7-2); The two ends of the first magnetic fluid channel transition section (6-1) are connected with annular magnetic fluid power-generation passage (2) and first piston cylinder (7-1) respectively, and the two ends of the second magnetic fluid channel transition section (6-2) are connected with the second piston cylinder 7-2 with annular magnetic fluid power-generation passage (2) respectively; Hold from piston cylinder (7) end to annular magnetic fluid power-generation passage (2), the radial section of magnetic fluid channel transition section (6) becomes annular from circle, the radius of magnetic fluid channel transition section (6) radial section diminishes gradually, and the radius of magnetic fluid channel transition section (6) radial section that close annular magnetic fluid power-generation passage (2) is held is minimum; Magnetic fluid channel transition section (6) adopts insulating material to make.
8. by circular passage according to claim 1 liquid-metal MHD generator, it is characterized in that: first piston cylinder (7-1) and the second piston cylinder (7-2) are cylindrical, coaxially arranged in first piston cylinder (7-1) have the first piston (8-1) that can move up and down, and coaxially arranged in the second piston cylinder (7-2) have second piston (8-2) that can move up and down; First piston cylinder (7-1), the second piston cylinder (7-2), first piston (8-1) and the second piston (8-2) all adopt insulating material to make.
9. by circular passage according to claim 1 liquid-metal MHD generator, it is characterized in that: liquid metal (9) is low-melting-point metal or alloy, described low-melting-point metal or alloy refer to that fusing point is lower than the fusible metal of 232 DEG C or alloy.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105720785A (en) * | 2016-04-12 | 2016-06-29 | 中国科学院电工研究所 | Single-tube multi-section liquid metal magnetofluid generator |
| CN106357084A (en) * | 2016-11-29 | 2017-01-25 | 无锡斯科海洋科技有限公司 | Double-channel liquid metal magnetic fluid power generator |
| CN106685180A (en) * | 2017-01-03 | 2017-05-17 | 中国科学院电工研究所 | Pulsed magnetohydrodynamic generator with high-speed liquid metal as power generation working medium |
| CN109639095A (en) * | 2019-01-24 | 2019-04-16 | 中国科学院电工研究所 | A kind of helical duct DC magnetic fluid pump |
| CN113915087A (en) * | 2020-07-10 | 2022-01-11 | 中国科学院理化技术研究所 | Thermoacoustic driving corrugated pipe generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105720785A (en) * | 2016-04-12 | 2016-06-29 | 中国科学院电工研究所 | Single-tube multi-section liquid metal magnetofluid generator |
| CN105720785B (en) * | 2016-04-12 | 2018-09-28 | 中国科学院电工研究所无锡分所 | A kind of single-pipe multistage liquid-metal MHD generator |
| CN106357084A (en) * | 2016-11-29 | 2017-01-25 | 无锡斯科海洋科技有限公司 | Double-channel liquid metal magnetic fluid power generator |
| CN106357084B (en) * | 2016-11-29 | 2020-02-14 | 中国科学院电工研究所无锡分所 | Double-channel liquid metal magnetohydrodynamic generator |
| CN106685180A (en) * | 2017-01-03 | 2017-05-17 | 中国科学院电工研究所 | Pulsed magnetohydrodynamic generator with high-speed liquid metal as power generation working medium |
| CN106685180B (en) * | 2017-01-03 | 2019-05-03 | 中国科学院电工研究所 | It is a kind of using high speed liquid metal as the PULSED MHD GENERATOR of generating working medium |
| CN109639095A (en) * | 2019-01-24 | 2019-04-16 | 中国科学院电工研究所 | A kind of helical duct DC magnetic fluid pump |
| CN113915087A (en) * | 2020-07-10 | 2022-01-11 | 中国科学院理化技术研究所 | Thermoacoustic driving corrugated pipe generator |
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Application publication date: 20151209 |