CN212656934U

CN212656934U - Thermoacoustic driving corrugated pipe generator

Info

Publication number: CN212656934U
Application number: CN202021351972.2U
Authority: CN
Inventors: 胡剑英; 吴张华; 罗二仓; 陈燕燕; 张丽敏; 朱顺敏
Original assignee: Technical Institute of Physics and Chemistry of CAS
Current assignee: Technical Institute of Physics and Chemistry of CAS
Priority date: 2020-07-10
Filing date: 2020-07-10
Publication date: 2021-03-05
Anticipated expiration: 2030-07-10

Abstract

The embodiment of the utility model provides a heat sound drive bellows generator, include: the thermoacoustic engine and the corrugated pipe seal harmonic oscillator; the bellows seal harmonic oscillator includes: a bellows and a resonator plate; the corrugated pipe is fixed in the pipe wall of the thermoacoustic engine to divide the pipe wall into two parts, the resonance sheets are arranged at two ends of the corrugated pipe, the resonance sheets and the corrugated pipe form a sealed space, and the sealed space is filled with liquid metal for resonance; the sealed space is internally provided with a magnetic pole and an electrode. The utility model provides a heat sound drive bellows generator adopts the bellows to encapsulate liquid metal, sets up magnetic pole and electrode in the sealed space that has liquid metal to pack, and connect the resonance piece at the both ends of bellows, make the bellows seal harmonic oscillator as sound-electricity conversion device, can reduce the technology degree of difficulty of heat sound electricity generation, promote the reliability, solve in the heat sound generator motor make the degree of difficulty big with the unstable problem of liquid metal magnetic current body liquid level.

Description

Thermoacoustic driving corrugated pipe generator

Technical Field

The utility model relates to a heat sound field especially relates to a heat sound drive bellows generator.

Background

The thermoacoustic generator consists of two parts, thermoacoustic engine and linear generator. As shown in fig. 1, the thermoacoustic engine mainly includes a heater 1, a regenerator 2, and a water cooler 3. The linear generator mainly comprises a piston 4, a rotor 5, a permanent magnet 6, a coil 7, an inner stator 8, an outer stator 9, a cylinder 10 and the like. When the temperature of a heater 1 in the thermoacoustic engine rises, a water cooler 3 keeps a certain temperature, a temperature gradient is established in the axial line direction of a heat regenerator 2, when the temperature gradient reaches a certain value, gas in the system can generate self-excited oscillation, and the engine converts heat energy into mechanical energy in the form of sound waves. The sound wave can push the piston 4 in the linear generator to move, because the mover 5 and the permanent magnet 6 are fixedly connected with the piston 4, the piston 4 moves to drive the mover 5 and the permanent magnet 6 to move, so that the magnetic flux in the coil 7 is changed, and the mechanical energy is converted into electric energy to be output. In order to improve the heat exchange performance of the engine, lubricating oil cannot exist in the thermoacoustic engine, so that the cylinder 10 and the piston 4 in the linear generator cannot be lubricated by the lubricating oil. The piston 4 and the mover 5 of the linear generator can be supported only by means of a plate spring or an air float, and thus a gap of the order of 10 μm must be maintained between the piston 4 and the cylinder 10, which causes great difficulty in processing and assembly.

In order to solve the above problems, the conventional method is to couple the liquid metal magnetohydrodynamic generator with the thermoacoustic engine. The liquid metal mhd generator is a mechanical energy to electrical energy conversion device without any moving parts, as shown in fig. 2, a magnetic pole 13 is arranged in one direction of a flow channel, when conductive liquid metal 11 flows through the magnetic pole 13, dry sound current is generated in a direction perpendicular to a magnetic field, and electrical energy can be output outwards as long as electrodes 12 are arranged on two sides of the flow channel in the direction perpendicular to the magnetic field. If the liquid metal is placed in the U-shaped pipe, and then the U-shaped pipe is connected with the thermoacoustic engine, the sound wave generated by the thermoacoustic engine can push the liquid metal 11 to reciprocate through the magnetic field, thereby generating electric energy. However, because the liquid metal can flow, the whole liquid metal magnetohydrodynamic generator cannot be inclined or inverted excessively, and meanwhile, if the movement amplitude of the liquid metal 11 is excessively large, liquid levels at two ends are unstable and liquid separation occurs, so that the normal operation of the liquid metal magnetohydrodynamic generator is influenced.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a heat sound drive bellows generator for the motor makes the big problem unstable with liquid metal magnetofluid liquid level of the degree of difficulty in solving heat sound generator.

The embodiment of the utility model provides a heat sound drive bellows generator, include:

the thermoacoustic engine and the corrugated pipe seal harmonic oscillator;

the bellows seal harmonic oscillator includes: a bellows and a resonator plate; the corrugated pipe is fixed in the pipe wall of the thermoacoustic engine to divide the pipe wall into two parts, the resonance sheets are installed at two ends of the corrugated pipe, the resonance sheets and the corrugated pipe form a sealed space, and the sealed space is filled with liquid metal for resonance; and a magnetic pole and an electrode are arranged in the sealed space.

According to the utility model discloses a heat sound drive bellows generator of embodiment, bellows seal harmonic oscillator still includes: a fixing member; the corrugated tube includes: a first bellows and a second bellows;

the first corrugated pipe and the second corrugated pipe are fixed in the pipe wall of the thermoacoustic engine through the fixing piece, the first corrugated pipe is connected to the first end of the fixing piece, and the second corrugated pipe is connected to the second end of the fixing piece.

According to the utility model discloses a heat sound drive bellows generator of embodiment, the resonance piece includes: a first resonance plate and a second resonance plate; the first resonant plate is connected to one end, far away from the fixing piece, of the first corrugated pipe, and the second resonant plate is connected to one end, far away from the fixing piece, of the second corrugated pipe.

According to the utility model discloses a heat sound drive bellows generator of embodiment, bellows seal harmonic oscillator still includes: a connecting shaft; the fixing piece is provided with a bearing hole, the connecting shaft penetrates through the bearing hole, the first end of the connecting shaft is connected with the first resonance sheet, and the second end of the connecting shaft is connected with the second resonance sheet.

According to the utility model discloses a heat sound drive bellows generator of embodiment, bellows seal harmonic oscillator still includes: a first and a second filling block;

the first end of the connecting shaft is connected with the first resonant plate through the first filling block, and the second end of the connecting shaft is connected with the second resonant plate through the second filling block.

According to the utility model discloses a heat sound drive bellows generator of embodiment, linear generator includes:

the fixing piece is provided with a plurality of communicating holes, and the first corrugated pipe is communicated with the second corrugated pipe through the communicating holes.

According to the utility model discloses a heat sound drive bellows generator of embodiment, be equipped with in the first relative orientation of intercommunicating pore the magnetic pole, be equipped with in the second relative orientation of intercommunicating pore the electrode.

According to the utility model discloses a heat sound drive bellows generator of embodiment, the mounting is mounting flange, the resonance piece is the plate flange, the bellows is the welding bellows.

According to the utility model discloses a heat sound drive bellows generator of embodiment, heat sound engine includes: the hot cavity, the heater, the heat regenerator and the water cooler are connected in sequence; the heat cavity is arranged at intervals with the resonant plate at one end of the corrugated pipe sequentially through the heater, the heat regenerator and the water cooler.

According to the utility model discloses a heat sound drive bellows generator of embodiment, heat sound drive bellows generator divide into the multiunit, each group heat sound drive bellows generator end to end connection in proper order.

The utility model provides a heat sound drive bellows generator adopts the bellows to encapsulate liquid metal, sets up magnetic pole and electrode in the sealed space that has liquid metal to pack, and connect the resonance piece at the both ends of bellows, make the bellows seal harmonic oscillator as sound-electricity conversion device, can reduce the technology degree of difficulty of heat sound electricity generation, promote the reliability, solve in the heat sound generator motor make the degree of difficulty big with the unstable problem of liquid metal magnetic current body liquid level.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of a prior art thermoacoustic generator;

FIG. 2 is a schematic diagram of a prior art liquid metal mhd generator;

fig. 3 is a schematic structural diagram of a thermoacoustic driven bellows generator according to an embodiment of the present invention;

FIG. 4 is a schematic cross-sectional view taken at A-A of FIG. 3;

fig. 5 is a schematic structural diagram of a thermoacoustic driven bellows generator according to another embodiment of the present invention;

reference numerals:

1. a heater; 2. a heat regenerator; 3. a water cooler; 4. a piston; 5. a mover; 6. a permanent magnet; 7. a coil; 8. an inner stator; 9. an outer stator; 10. a cylinder; 11. a liquid metal; 12. an electrode; 13. a magnetic pole; 14. a bellows; 15. a resonant chip; 16. a tube wall; 17. a fixing member; 18. a connecting shaft; 19. a first filling block; 20. a second filling block; 21. a communicating hole; 22. a thermal chamber.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

The thermoacoustic driven bellows generator provided by the embodiments of the present invention is described below with reference to fig. 3 and 4, and includes: the thermoacoustic engine and the corrugated pipe seal harmonic oscillator.

Wherein, bellows seal harmonic oscillator includes: a bellows 14 and a resonator plate 15. The bellows 14 is fixed within the wall 16 of the thermoacoustic engine, the bellows 14 separating the wall 16 into two parts. The resonator plates 15 are installed at both ends of the corrugated tube 14, the resonator plates 15 and the corrugated tube 14 form a sealed space, and the sealed space is filled with the liquid metal 11 for resonance. The sealed space is provided with a magnetic pole 13 and an electrode 12.

In the working process, the thermoacoustic engine converts heat energy into mechanical energy in the form of sound waves, and the sound waves can push the corrugated pipe sealing harmonic oscillator to move. Due to the good expansion and contraction of the bellows 14, when the gas pushes the resonator plate 15 on one side to move, the resonator plate 15 on the other side will perform the same movement, thereby driving the liquid metal 11 to flow in the sealed space. If the liquid metal 11 passes through the magnetic field formed by the magnetic poles 13 during the flowing of the liquid metal 11, an induced current is generated in the magnetic field, and the electrode 12 collects the induced current in the magnetic field, so that the mechanical energy can be effectively converted into electric energy.

Because the liquid metal 11 is sealed in the bellows 14, the direction of the thermoacoustic drive bellows generator is not limited, so that the whole structure can not be affected even if the whole structure is turned upside down. And because the liquid column is sealed, the liquid vapor can not influence the heat exchange in the thermoacoustic engine.

The embodiment of the utility model provides a heat sound drive bellows generator adopts the bellows to encapsulate liquid metal, sets up magnetic pole and electrode in the sealed space that has liquid metal to pack, and connect the resonance piece at the both ends of bellows, make the bellows seal harmonic oscillator as acoustoelectric conversion device, can reduce the technology degree of difficulty of heat sound electricity generation, promote the reliability, solve in the heat sound generator motor make the degree of difficulty big with the unstable problem of liquid metal magnetic current body liquid level.

The utility model also provides a bellows seal harmonic oscillator, as shown in fig. 3 and 4, bellows seal harmonic oscillator still includes: and a fixing member 17. The bellows 14 includes: first bellows and second bellows the first bellows and the second bellows are fixed in the pipe wall 16 of the thermoacoustic engine by a fixing member 17, the first bellows is connected to a first end of the fixing member 17, and the second bellows is connected to a second end of the fixing member 17.

Wherein the resonator plate 15 includes: a first resonator plate and a second resonator plate. The first resonant plate is connected to the end of the first corrugated tube away from the fixing member 17, and the second resonant plate is connected to the end of the second corrugated tube away from the fixing member 17.

The bellows 14 may be secured by welding. Wherein the first bellows is welded to a first end of the fixture 17 and the second bellows is welded to a second end of the fixture 17. The first resonator plate is welded to the end of the first corrugated tube away from the fixing member 17. The second resonator plate is welded to the end of the second corrugated tube remote from the fixing member 17.

Wherein, the fixing member 17 can be a fixing flange, the resonator plate 15 can be a flat flange, and the corrugated tube 14 can be a welding corrugated tube. The welded corrugated pipe is made up by using precision welding process, and is characterized by that it mainly uses two formed hollow diaphragms, and uses concentric circular mode to make inner edge welding to form diaphragm pair, then uses several diaphragm pairs to stack and build together and make outer edge welding to form corrugated section, and then uses two ends and end plate metal welding to form corrugated pipe group, so that it can make reciprocating movement together with resonant plate 15 according to the requirements of exterior.

Since the liquid metal 11 and the resonator plate 15 have a certain weight, and the corrugated tube 14 is relatively flexible, the deformation of the corrugated tube 14 due to the gravity of the resonator plate 15 is reduced. The bellows seal harmonic oscillator still includes: is connected to the shaft 18. The fixing member 17 is provided with a bearing hole, the connecting shaft 18 penetrates through the bearing hole, a first end of the connecting shaft 18 is connected with the first resonance plate, and a second end of the connecting shaft 18 is connected with the second resonance plate. When the gas pushes the first resonant plate to move, the first resonant plate drives the second resonant plate through the connecting shaft 18, and the second resonant plate performs the same movement.

Further, a filler block material can be fixed on the connecting shaft 18 to reduce the filling amount of the liquid metal 11, so that the deformation influence of the gravity of the liquid metal 11 on the corrugated pipe 14 can be reduced. Specifically, the bellows seal harmonic oscillator further includes: a first filling block 19 and a second filling block 20. A first end of the connecting shaft 18 is connected to the first resonator plate via a first filling mass 19 and a second end of the connecting shaft 18 is connected to the second resonator plate via a second filling mass 20.

As shown in fig. 4, the fixing member 17 is provided with a plurality of communication holes 21, and the first bellows is communicated with the second bellows through the communication holes 21. The positive and negative magnetic poles 13 are provided in the first opposing direction of the communication hole 21, so that a magnetic field is formed in one direction of the communication hole 21. The electrodes 12 are provided in the second opposing direction of the communication holes 21.

In this embodiment, the communication hole 21 is a square hole, and the magnetic poles 13 and the electrodes 12 in the communication hole 21 are alternately mounted on the hole wall in sequence. The magnetic pole 13 forms a magnetic field in the communication hole 21, when the liquid metal 11 passes through the communication hole 21, induced current is generated in the magnetic pole 13, the electrode 12 collects the induced current, and the mechanical energy of the liquid metal 11 can be converted into electric energy for output.

In this embodiment, the thermoacoustic engine includes: the hot cavity 22, the heater 1, the heat regenerator 2 and the water cooler 3 are connected in sequence; the hot cavity 22 is communicated with the pipe wall 16 of the thermoacoustic engine through the heater 1, the heat regenerator 2 and the water cooler 3 in sequence.

In the working process, the temperature of the heater 1 rises, the water cooler 3 keeps a certain temperature, the axial direction in the heat regenerator 2 can establish a temperature gradient, and when the temperature gradient reaches a certain value, the fluid in the pipe wall 16 of the thermoacoustic engine can generate self-excited oscillation, so that the engine converts the heat energy into mechanical energy in the form of sound waves. And because the liquid metal 11 is sealed by the corrugated pipe 14, the interior of the thermoacoustic engine is not polluted to influence heat exchange.

In order to enhance the power generation of the thermoacoustic driven bellows generator, as shown in fig. 5, the thermoacoustic driven bellows generator can be divided into a plurality of groups, and each group of thermoacoustic driven bellows generators are sequentially connected end to end. Each group of thermoacoustic driving corrugated pipe generators is provided with a thermoacoustic engine and a corrugated pipe sealing harmonic oscillator.

In other embodiments, the number of the thermo-acoustic engines and the bellows sealing harmonic oscillators in each group can be adjusted according to actual requirements to meet different working requirements.

To sum up, the embodiment of the utility model provides a heat sound drive bellows generator adopts the bellows to encapsulate liquid metal, sets up magnetic pole and electrode in the confined space that the packing has liquid metal to connect the resonance piece at the both ends of bellows, make the sealed harmonic oscillator of bellows as acoustoelectric conversion equipment, can reduce the technology degree of difficulty of heat sound electricity generation, promote the reliability, solve in the heat sound generator motor and make the degree of difficulty big and the unstable problem of liquid metal magnetic current body liquid level.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims

1. A thermoacoustically driven bellows generator, comprising:

the thermoacoustic engine and the corrugated pipe seal harmonic oscillator;

2. The thermoacoustically driven bellows generator of claim 1, wherein the bellows seal resonator further comprises: a fixing member; the corrugated tube includes: a first bellows and a second bellows;

the first corrugated pipe and the second corrugated pipe are fixed in the pipe wall through the fixing piece, the first corrugated pipe is connected to the first end of the fixing piece, and the second corrugated pipe is connected to the second end of the fixing piece.

3. The thermoacoustically driven bellows generator of claim 2, wherein the resonator plate comprises: a first resonance plate and a second resonance plate; the first resonant plate is connected to one end, far away from the fixing piece, of the first corrugated pipe, and the second resonant plate is connected to one end, far away from the fixing piece, of the second corrugated pipe.

4. The thermoacoustically driven bellows generator of claim 3, wherein the bellows seal resonator further comprises: a connecting shaft; the fixing piece is provided with a bearing hole, the connecting shaft penetrates through the bearing hole, the first end of the connecting shaft is connected with the first resonance sheet, and the second end of the connecting shaft is connected with the second resonance sheet.

5. The thermoacoustically driven bellows generator of claim 4, wherein the bellows seal resonator further comprises: a first and a second filling block;

6. The thermoacoustic driven bellows generator of claim 2, wherein the anchor has a plurality of communication holes, and the first bellows is in communication with the second bellows through the communication holes.

7. The thermoacoustically driven bellows generator of claim 6, wherein the magnetic poles are disposed in a first opposing direction of the communication holes and the electrodes are disposed in a second opposing direction of the communication holes.

8. The thermoacoustically driven bellows generator of claim 2, wherein the mount is a fixed flange, the resonator plate is a flat flange, and the bellows is a welded bellows.

9. The thermoacoustically driven bellows generator of claim 1, wherein the thermoacoustic engine comprises: the hot cavity, the heater, the heat regenerator and the water cooler are connected in sequence; the heat cavity is arranged at intervals with the resonance plate at one end of the corrugated pipe sequentially through the heater, the heat regenerator and the water cooler.

10. The thermoacoustically driven bellows generator of any one of claims 1-9, wherein the thermoacoustically driven bellows generator is divided into a plurality of groups, each group being connected end to end in sequence.