A Faraday-type magnetic fluid power generation channel device based on heat sink

Abstract

The present invention discloses a heat sink-based Faraday type magnetofluid power generation channel device, including a support frame; two power generation blocks are installed on the support frame, including two mutually parallel head power generation electrodes connected by electrode tensioning bolts, multiple intermediate power generation electrodes and inter-electrode insulating gaskets, multiple intermediate power generation electrodes are arranged between the two head power generation electrodes, and inter-electrode insulating gaskets are arranged between the multiple intermediate power generation electrodes. Aiming at the actual working conditions of the magnetofluid power generation channel, the present invention proposes a heat sink power generation channel device for magnetofluid power generation, wherein the power generation part is an integral module, which is more convenient to replace, and the channel reliability is high. The channel sealing mostly adopts mechanical sealing methods such as steps and nesting, which reduces the use of connectors, and the channel body is processed with materials with good thermal conductivity such as copper, which can quickly transfer and absorb heat, avoid the use of cooling water, and improve the efficiency of the magnetofluid power generation channel.

Description

Technical Field

[0001] The present invention belongs to the technical field of plasma heating equipment, and in particular relates to a Faraday-type magnetic fluid power generation channel device based on a heat sink. Background Art

[0002] Magnetohydrodynamic power generation is a power generation method that directly extracts energy from high-enthalpy gases. This method does not require the conversion process of mechanical parts. It mainly extracts electrical energy by cutting the magnetic flux lines in the channel to generate induced electromotive force. Magnetohydrodynamic power generation has broad application prospects in the field of onboard power supply technology for hypersonic aircraft, and it is of great significance to conduct relevant ground test research.

[0003] The magnetofluid power generation channel is the core part of magnetofluid power extraction, and the thermal electromagnetic conversion process occurs in the device. In different application fields, the structure and operation principle of magnetofluid power generation channels are also different. At present, the research and development of magnetofluid power generation channels is mainly focused on linear magnetofluid channels with simple structure, clear principle and high efficiency. According to different principles, linear magnetofluid power extraction channels are divided into continuous electrode type, segmented Faraday type, Hall type and diagonal type. The segmented Faraday magnetofluid power generation channel is widely used in magnetofluid power generation systems with relatively small Hall parameters and channel sizes due to its clear principle, simple structure and good stability.

[0004] The magnetofluid channel is a key component for magnetofluid power generation. In engineering, the method of injecting ionized seeds into high-temperature combustion gas is usually adopted to obtain magnetofluid power generation fluid. In this case, the temperature of the fluid flowing through the power generation channel is generally above 2000K. Long-term stable operation under high temperature conditions has become the main technical difficulty in the design of magnetofluid power generation channels. High temperature will bring problems such as wall ablation, electrode surface oxidation, and channel thermal deformation to the power generation channel. High-temperature combustion gas is usually obtained by the combustion of hydrocarbon fuels. As the working conditions change, carbon deposition will occur on the inner surface of the channel. In the process of adding ionized seeds, due to the fast flow rate of the fluid, it often reaches the critical sonic speed or supersonic speed. The ionized seeds will have an erosion effect on the inner wall of the channel. All of the above factors will affect the normal operation of the channel, and thus affect the efficiency of magnetofluid power generation.

[0005] At present, water cooling is often used in the design of magnetohydrodynamic power generation devices. Although this method can reduce the temperature resistance requirements of materials, the water cooling method will reduce the temperature near the electrode, which will lead to a decrease in the electrical conductivity there, and directly increase the electrode voltage drop near the electrode. Both the power density and the electrical efficiency basically decrease linearly with the electrode voltage drop. Summary of the invention

[0006] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a heat sink type Faraday type magnetofluid power generation channel device based on the actual working conditions of the magnetofluid power generation channel. The device is easy to assemble, low in cost, can operate stably under high temperature conditions, and is easy to replace the power generation section.

[0007] In order to solve the technical problem, the technical solution of the present invention is: a Faraday type magnetofluid power generation channel device based on a heat sink, comprising two power generation blocks, a support frame, two insulating members, an electrode tensioning bolt, a head power generation electrode, an intermediate power generation electrode, a third insulating gasket and an inter-electrode insulating gasket;

[0008] The two power generation blocks are installed on the support frame at intervals, the two insulating members are perpendicular to the power generation blocks and installed between the two power generation blocks and the two insulating members are parallel to each other, the third insulating gasket is installed between the insulating members and the connection between the power generation blocks, and the two power generation blocks and the two insulating members form a hollow cavity;

[0009] The power generation block includes two parallel head power generation electrodes, a plurality of intermediate power generation electrodes and an inter-electrode insulating gasket. A plurality of intermediate power generation electrodes are arranged between the two head power generation electrodes, and an inter-electrode insulating gasket is arranged between the plurality of intermediate power generation electrodes. The electrode tightening bolt passes through the axis of the head power generation electrode, the intermediate power generation electrode and the inter-electrode insulating gasket to connect them into one.

[0010] Preferably, the support frame includes four tensioning screws, eight fastening nuts, two connecting flanges and two transition pieces. The transition piece is installed between two parallel connecting flanges. The transition piece and the connecting flanges are perpendicular to each other. The two end faces of the transition piece close to the connecting flanges have steps, which are fit-connected to the inner side of the connecting flanges. The four tensioning screws pass through the two connecting flanges and are tightened by eight fastening nuts.

[0011] Preferably, two first insulating gaskets are further included, which are installed between the two transition pieces and located on both sides of the power generation block, and the end faces of the first insulating gaskets have step portions, which are fitted and connected to the inner sides of the transition pieces.

[0012] Preferably, it also includes an upper cover plate, a lower cover plate and two second insulating gaskets, which are relatively installed at the two ends of the two power generation blocks. The two second insulating gaskets are respectively installed between the upper cover plate, the lower cover plate and the two power generation blocks. The end face of the second insulating gasket has a step, and the step is fitted and connected to the inner side of the transition piece.

[0013] Preferably, it also includes a protective part and a power generation block fastening bolt, the two side end faces of the middle power generation electrode and the head power generation electrode have a step, the step is fitted and connected to the insulating part, the protective part is installed on the outside of the insulating part, and the power generation block fastening bolt extends into the upper cover plate and passes through the protective part to be connected to the lower cover plate.

[0014] Preferably, the connecting flange, transition piece, upper cover plate, lower cover plate and protective piece are all made of red copper.

[0015] Preferably, the first insulating gasket, the second insulating gasket, the third insulating gasket, the inter-electrode insulating gasket, the electrode tightening bolts, the insulating member, and the power generation block fastening bolts are all made of boron nitride ceramics.

[0016] Compared with the prior art, the advantages of the present invention are:

[0017] (1) The present invention modularizes the easily consumable power generation electrodes, which are easy to replace during use, reduce the complexity of the work, improve efficiency, and facilitate industrial practicality;

[0018] (2) The present invention proposes a heat sink type power generation channel device for magnetofluid power generation in view of the actual working conditions of the magnetofluid power generation channel. The main body of the channel is processed by materials with good thermal conductivity such as copper. The copper with excellent heat sink property can quickly transfer and absorb heat, avoiding the use of cooling water and improving the efficiency of the magnetofluid power generation channel. The copper has good machinability, and it is convenient to assemble the channel and replace the power generation section, and the channel has high reliability.

[0019] (3) The magnetic fluid power generation channel of the present invention is sealed by mechanical sealing methods such as steps and nesting, which reduces the use of connectors and improves the reliability of the channel;

[0020] (4) The present invention has a simple structure, a long service life, is safe and environmentally friendly, has a low cost, saves time and effort, and improves industrial production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 , a schematic structural diagram of a Faraday type magnetic fluid power generation channel device based on a heat sink type of the present invention;

[0022] Figure 2 , a schematic structural diagram of a power generation module of a Faraday type magnetic fluid power generation channel device based on a heat sink type of the present invention;

[0023] Description of reference numerals:

[0024] 1. Fastening nut, 2. Tightening screw, 3. Electrode fastening nut, 4. First insulating gasket, 5. Power generation block fastening bolt;

[0025] 6-1, upper cover plate, 6-2, lower cover plate;

[0026] 7. Second insulating gasket, 8. Electrode tightening bolt, 9. Connecting flange, 10. Hollow cavity, 11. Transition piece, 12. Head power generation electrode, 13. Inter-electrode insulating gasket, 14. Middle power generation electrode, 15. Third insulating gasket, 16. Protective piece, 17. Insulating piece. DETAILED DESCRIPTION

[0027] The specific implementation mode of the present invention is described below in conjunction with embodiments:

[0028] It should be noted that the structures, proportions, sizes, etc. shown in this specification are only used to match the contents disclosed in the specification so that people familiar with this technology can understand and read them, and are not used to limit the conditions under which the present invention can be implemented. Any structural modification, change in proportional relationship or adjustment of size should still fall within the scope of the technical content disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0029] At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" cited in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of implementation of the present invention without substantially changing the technical content.

[0030] like Figures 1-2 As shown, the present invention discloses a Faraday type magnetic fluid power generation channel device based on a heat sink, comprising two power generation blocks, a support frame, two insulating members 17, an electrode tightening bolt 8, a head power generation electrode 12, an intermediate power generation electrode 14, a third insulating gasket 15 and an inter-electrode insulating gasket 13,

[0031] Two power generation blocks are installed on the support frame at intervals, two insulating members 17 are perpendicular to the power generation blocks and installed between the two power generation blocks and the two insulating members 17 are parallel to each other, a third insulating gasket 15 is installed between the insulating member 17 and the connection between the power generation blocks, and the two power generation blocks and the two insulating members 17 form a hollow cavity;

[0032] The power generation block includes two head power generation electrodes 12 arranged in parallel, a plurality of intermediate power generation electrodes 14 and an inter-electrode insulating gasket 13. A plurality of intermediate power generation electrodes 14 are arranged between the two head power generation electrodes 12, and an inter-electrode insulating gasket 13 is arranged between the plurality of intermediate power generation electrodes 14. The electrode tightening bolt 8 passes through the axis of the head power generation electrode 12, the intermediate power generation electrode 14 and the inter-electrode insulating gasket 13 to connect them as a whole.

[0033] The head power generation electrode 12 and the middle power generation electrode 14 are made of materials with good electrical and thermal conductivity such as tungsten alloy and molybdenum alloy;

[0034] Specifically, the support frame includes four tensioning screws 2, eight fastening nuts 1, two connecting flanges 9 and two transition pieces 11. The transition piece 11 is installed between two parallel connecting flanges 9. The transition piece 11 and the connecting flanges 9 are perpendicular to each other. The two end faces of the transition piece 11 close to the connecting flanges 9 have a step, which is fitted and connected to the inner side of the connecting flange 9. The four tensioning screws 2 pass through the two connecting flanges 9 and are tightened by eight fastening nuts 1. The entire power generation channel is fixed by the fastening nuts 1 and the tensioning screws 2 to prevent the components from being damaged due to over-tightening when the temperature is high. The overall structure is simple and the stability is high.

[0035] The connecting flange 9 and the transition piece 11 are both made of materials with good thermal conductivity such as copper. During processing, the transition piece 11 and the connecting flange 9 are matched with a clearance fit. When the temperature is high, the components will not be damaged due to over-tight assembly.

[0036] Specifically, two first insulating gaskets 4 are also included, which are installed between the two transition pieces 11 and located on both sides of the power generation block. The end surface of the first insulating gasket 4 has a step, and the step is connected to the inner side of the transition piece 11. The first insulating gasket 4 is made of materials such as boron nitride ceramics with good insulation, temperature resistance and impact resistance. The edge of the boron nitride ceramic is processed into a step shape. When the channel is compressed, the step edge can achieve a good sealing effect, without the need to use other connectors for sealing, thereby avoiding the problem of thermal deformation of the connector.

[0037] Specifically, it also includes an upper cover plate, a lower cover plate and two second insulating gaskets 7, which are relatively installed at the two ends of the two power generation blocks. The two second insulating gaskets 7 are respectively installed between the upper cover plate 6-1, the lower cover plate 6-2 and the two power generation blocks. The end face of the second insulating gasket 7 has a step, and the step is fitted and connected to the inner side of the transition piece.

[0038] Specifically, it also includes a protective member 16 and a power generation block fastening bolt 5. The two side end faces of the middle power generation electrode 14 and the head power generation electrode 12 have a step, which is fitted and connected with the insulating member 17. The protective member 16 is installed on the outside of the insulating member. The power generation block fastening bolt 5 extends into the upper cover plate 6-1 and passes through the protective member 16 to connect with the lower cover plate 6-2; wherein the cover plate and the protective member 16 are both made of materials with good thermal conductivity such as copper. The channel sealing mostly adopts mechanical sealing methods such as steps and nesting, which reduces the use of connectors and improves the reliability of the channel.

[0039] Among them, the power generation block fastening bolt 5, the electrode fastening nut 3, the inter-electrode insulating gasket 13, the cover plate, the second insulating gasket 7, the electrode tensioning bolt 8, the head power generation electrode 12, the middle power generation electrode 14, the third insulating gasket 15, the protective member 16, and the insulating member 17 constitute the magnetic fluid power generation section; wherein the head power generation electrode 12 has a circular hole in the middle for accommodating the electrode fastening nut 3 or the electrode tensioning bolt 8 head;

[0040] A circular hole is formed in the middle of the middle power generation electrode 14 for placing the electrode tensioning bolt 8;

[0041] The middle power generation electrode 14 and the head power generation electrode 12 are both stepped, and the steps are used to place the protective member 16 and the insulating member 17;

[0042] Inter-electrode insulating gaskets 13 are placed between the head power generation electrode 12 and the middle power generation electrode 14, and between the middle power generation electrode 14 and the middle power generation electrode 14, and the inter-electrode insulating gaskets 13 are used for insulation;

[0043] The electrode tension bolt 8 passes through the head power generation electrode 12, the middle power generation electrode 14, and the inter-electrode insulating gasket 13, and is fastened by the electrode fastening nut 3 to form a power generation block. The cover plate covers the power generation block to prevent the high-temperature gas in the power generation channel from overflowing;

[0044] The insulating member 17 serves as the insulating surface of the power generation section and forms a rectangular channel with the electrode surface. The protective member 16 is placed outside the insulating member 17. The power generation block fastening bolts 5 pass through the cover plate and the protective member 16 to fix the power generation section into a whole. The easily damaged power generation section is separately formed into a whole and connected by the second insulating gasket 7 and the transition member 11, which is easy to replace.

[0045] Specifically, the connecting flange 9, transition piece 11, upper cover plate 6-1, lower cover plate 6-2 and protective piece 16 are all made of copper. Copper with excellent heat sink property can quickly transfer and absorb heat, avoid the use of cooling water, improve the efficiency of the magnetic fluid power generation channel, copper has good machinability, channel assembly, power generation section replacement is more convenient, and channel reliability is high.

[0046] Specifically, the first insulating gasket 4, the second insulating gasket 7, the third insulating gasket 15, the inter-electrode insulating gasket 13, the electrode tightening bolt 8, the insulating member 17, and the power generation block fastening bolt 5 are all made of materials such as boron nitride ceramics with good insulation, temperature resistance, and impact resistance.

[0047] Red copper with excellent heat sink properties can quickly transfer and absorb heat, avoiding the use of cooling water and improving the efficiency of the magnetic fluid power generation channel. Red copper has good machinability, which makes it easier to assemble the channel and replace the power generation section, and the channel reliability is high. The channel seal mostly adopts mechanical sealing methods such as steps and nesting, which reduces the use of connectors and improves the reliability of the channel. The easily damaged power generation section is integrated into a single unit, connected by an insulating gasket 7 and a transition piece 11, and is easy to replace.

[0048] Aiming at the actual working conditions of the magnetofluid power generation channel, the present invention proposes a design method and device for a heat sink type power generation channel for magnetofluid power generation. The method and device are easy to assemble and low in cost, can operate stably under high temperature conditions, avoid the use of cooling water, and improve the efficiency of the magnetofluid power generation channel. Red copper has good machinability, and it is convenient to assemble the channel and replace the power generation section. The channel has high reliability and long service life, is safe and environmentally friendly, has low cost, saves time and effort, and improves industrial production efficiency.

[0049] The preferred embodiments of the present invention are described in detail above, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of the present invention.

[0050] Many other changes and modifications may be made without departing from the concept and scope of the present invention.It should be understood that the present invention is not limited to the specific embodiments, and the scope of the present invention is defined by the appended claims.

Claims

1. A Faraday type magnetic fluid power generation channel device based on a heat sink, characterized in that: It comprises two power generation blocks, a support frame, two insulating parts, an electrode tensioning bolt, a head power generation electrode, a middle power generation electrode, a third insulating gasket (15) and an inter-electrode insulating gasket. The two power generation blocks are installed on the support frame at intervals, the two insulating members are perpendicular to the power generation blocks and installed between the two power generation blocks and the two insulating members are parallel to each other, the third insulating gasket is installed between the insulating members and the connection between the power generation blocks, and the two power generation blocks and the two insulating members form a hollow cavity; The power generation block comprises two parallel head power generation electrodes, a plurality of middle power generation electrodes and an inter-electrode insulating gasket, a plurality of middle power generation electrodes are arranged between the two head power generation electrodes, and an inter-electrode insulating gasket is arranged between the plurality of middle power generation electrodes; the electrode tightening bolt passes through the axis of the head power generation electrode, the middle power generation electrode and the inter-electrode insulating gasket to connect them into one; The support frame includes four tensioning screws, eight fastening nuts, two connecting flanges and two transition pieces. The transition piece is installed between two parallel connecting flanges. The transition piece and the connecting flanges are perpendicular to each other. The two end faces of the transition piece close to the connecting flanges have steps. The steps are fitted and connected with the inner side of the connecting flanges. The four tensioning screws pass through the two connecting flanges and are tightened by eight fastening nuts. The connecting flange and transition piece are both made of red copper.

2. A heat sink-based Faraday type magnetic fluid power generation channel device according to claim 1, characterized in that: It also includes two first insulating gaskets (4), which are installed between the two transition pieces and located on both sides of the power generation block, and the end faces of the first insulating gaskets have step portions, which are fitted and connected to the inner side of the transition piece.

3. A heat sink-based Faraday type magnetic fluid power generation channel device according to claim 2, characterized in that: It also comprises an upper cover plate, a lower cover plate and two second insulating gaskets (7), which are mounted at the two ends of the two power generation blocks in a relative manner, the two second insulating gaskets (7) being mounted respectively between the upper cover plate, the lower cover plate and the two power generation blocks, the end faces of the second insulating gaskets (7) having a step, which is fitted and connected to the inner side of the transition piece.

4. A heat sink-based Faraday type magnetic fluid power generation channel device according to claim 3, characterized in that: It also includes a protective part and a power generation block fastening bolt. The end faces of the middle power generation electrode and the head power generation electrode have a step, the step is fitted and connected with the insulating part, the protective part is installed on the outside of the insulating part, and the power generation block fastening bolt extends into the upper cover plate and passes through the protective part to be connected with the lower cover plate.

5. A heat sink-based Faraday type magnetic fluid power generation channel device according to claim 4, characterized in that: The first insulating gasket (4), the second insulating gasket (7), the third insulating gasket (15), the inter-electrode insulating gasket, the electrode tensioning bolts, the insulating member and the power generation block fastening bolts are all made of boron nitride ceramics.

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