Thermoacoustic power generation structure

Abstract

This invention provides a thermoacoustic power generation structure that suppresses the vibration of a linear generator through a simple structure. The thermoacoustic power generation structure includes two thermoacoustic power generation systems. Each of the two systems includes a linear generator, a ring tube, and a prime mover. The linear generator has a piston that vibrates back and forth within a cylinder to convert acoustic energy into electrical energy. The ring tube is connected to the linear generator via a resonant tube. The prime mover is located within the ring tube and includes a cooler, a heat accumulator, and a heater arranged in sequence. The linear generator has a permanent magnet, a coil, an inner yoke, and an outer yoke. The permanent magnet is located on the inner yoke, the piston is located at one end of the inner yoke, and the coil is located on the outer yoke. The thermoacoustic power generation structure also includes a linkage mechanism that connects the inner yoke of one of the two thermoacoustic power generation systems to the inner yoke of the other. The two thermoacoustic power generation systems are arranged opposite each other with the same phase.

Description

Technical Field

[0001] This utility model relates to a power generation structure, and more particularly to a thermoacoustic power generation system. Background Technology

[0002] In recent years, research and development efforts have been made to contribute to energy efficiency in order to ensure access to affordable, reliable, sustainable and advanced energy for more people.

[0003] In existing technology, a thermoacoustic generator has been proposed, which converts thermal energy from a prime mover into mechanical energy in the form of sound waves. This mechanical energy drives the piston of a linear generator to reciprocate along its central axis, thereby enabling the linear generator to further convert the mechanical energy into electrical energy output. However, in existing thermoacoustic power generation systems, the vibration of the linear generator generates noise and may cause damage to the device. Therefore, researching and developing a structure to suppress the vibration of a thermoacoustic generator is an important research topic. Utility Model Content

[0004] This invention provides a thermoacoustic power generation structure that suppresses the vibration of a linear generator through a simple structure.

[0005] According to an embodiment of this utility model, the thermoacoustic power generation structure includes: two thermoacoustic power generation systems, each of the two thermoacoustic power generation systems including a linear generator, an annular tube, and a prime mover. The linear generator has a piston that vibrates back and forth in a cylinder to convert acoustic energy into electrical energy. The annular tube is connected to the linear generator through a resonant tube. The prime mover is disposed in the annular tube and includes a cooler, a heat accumulator, and a heater arranged in sequence. The linear generator has a permanent magnet, a coil, an inner yoke, and an outer yoke. The permanent magnet is disposed in the inner yoke, the piston is located at one end of the inner yoke, and the coil is disposed in the outer yoke. The thermoacoustic power generation structure also includes a linkage mechanism that connects the inner yoke of one of the two thermoacoustic power generation systems to the inner yoke of the other of the two thermoacoustic power generation systems. The two thermoacoustic power generation systems are arranged opposite each other with the same phase.

[0006] In an embodiment of the present invention, the linkage mechanism includes four links and four joints, each of the four links being connected to two other links via two of the four joints, and the inner yoke of one of the two thermoacoustic power generation systems and the inner yoke of the other of the two thermoacoustic power generation systems being connected to two opposite joints of the four joints.

[0007] In an embodiment of the present invention, the thermoacoustic power generation structure further includes two additional linear generators, which are respectively connected to two opposite joints of the four joints to generate electricity through the lifting and lowering of the linkage mechanism.

[0008] Based on the above, in the thermoacoustic power generation structure of this invention, a linkage mechanism is used to connect the inner yokes of the linear generators of the two thermoacoustic power generation systems. Accordingly, the vibrations generated by the linear generators of the two thermoacoustic power generation systems, which are arranged opposite each other with the same phase, can cancel each other out. Thus, the thermoacoustic power generation structure of this invention suppresses the vibration of the linear generators through a simple structure.

[0009] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of a thermoacoustic power generation structure according to an embodiment of the present invention;

[0011] Figure 2 yes Figure 1 A three-dimensional diagram of the linkage mechanism;

[0012] Figure 3A and Figure 3B Show Figure 1 The operating method of the linkage mechanism.

[0013] Explanation of reference numerals in the attached figures:

[0014] 10A, 10B: Linear generators

[0015] 11: Piston

[0016] 12: Cylinder block

[0017] 13: Pressure Vessel

[0018] 14: Inner yoke

[0019] 15: External yoke

[0020] 100: Thermoacoustic power generation system

[0021] 110: Circular pipe

[0022] 120: Prime Motion Machine

[0023] 121: Heat accumulator

[0024] 122: Cooler

[0025] 123: Heater

[0026] 130: Resonant tube

[0027] 1000: Thermoacoustic power generation structure

[0028] CL: Coil

[0029] D1, D1', D2, D2': Direction

[0030] J: Joint

[0031] PM: Permanent magnet

[0032] L1, L2: Connecting rods. Detailed Implementation

[0033] Figure 1 This is a schematic diagram of a thermoacoustic power generation structure according to an embodiment of the present invention. Please refer to it. Figure 1 In this embodiment, the thermoacoustic power generation structure 1000 includes two thermoacoustic power generation systems 100. Each of the two thermoacoustic power generation systems 100 includes a linear generator 10A, a ring tube 110, a prime mover 120, and a resonant tube 130. In this embodiment, the ring tube 110 is sealed with a working gas. Figure 1 As shown, in this embodiment, the prime mover 120 is disposed in the annular tube 110 and includes a cooler 122, a heat accumulator 121 and a heater 123 arranged sequentially along the tube axis of the annular tube 110. The heat accumulator 121 is installed in the annular tube 110 and is a narrow flow channel. The heater 123 is disposed at one end of the heat accumulator 121 and the cooler 122 is disposed at the other end of the heat accumulator 121.

[0034] On the other hand, one end of the resonant tube 130 is connected to the annular tube 110, and the other end of the resonant tube 130 is connected to the linear generator 10A. That is, the annular tube 110 is connected to the linear generator 10A through the resonant tube 130. Specifically, in this embodiment, the thermoacoustic power generation system 100 generates a temperature gradient through the heater 123 and cooler 122 at both ends of the heat accumulator 121. When the temperature ratio at both ends of the heat accumulator 121 exceeds a certain critical value, the working gas in the pipe generates self-excited vibration, so that the thermal energy is converted into acoustic energy in the prime mover 120 and is transferred to the linear generator 10A through the annular tube 110 and the resonant tube 130.

[0035] Furthermore, such as Figure 1As shown, in this embodiment, the linear generator 10A includes a piston 11, a cylinder 12, a pressure vessel 13, a permanent magnet PM, a coil CL, an inner yoke 14, and an outer yoke 15. Specifically, the piston 11 is located at one end of the inner yoke 14, at least a portion of the piston 11 is located in the cylinder 12, and it is capable of reciprocating within the cylinder 12. The inner yoke 14 moves together with the piston 11. The permanent magnet PM is disposed on the inner yoke 14, the coil CL is disposed on the outer yoke 15, and the pressure vessel 13 has an internal space for accommodating the coil CL and the permanent magnet PM. When the acoustic energy generated in the annular tube 110 is transmitted to the linear generator 10A through the resonant tube 130, the piston 11 vibrates back and forth within the cylinder 12, driving the magnetic yoke in the linear generator 10A. Through the movement of the magnetic yoke in the linear generator 10A, the magnetic flux of the permanent magnet PM in the coil CL changes, generating an electromotive force. In this way, acoustic energy is converted into electrical energy in the linear generator 10A.

[0036] The thermoacoustic power generation structure 1000 of this embodiment also includes a linkage mechanism 1100. The linkage mechanism 1000 connects the inner yoke 14 of the linear generator 10A of one of the two thermoacoustic power generation systems 100 to the inner yoke 14 of the linear generator 10A of the other thermoacoustic power generation system 100. The two thermoacoustic power generation systems 100 are arranged opposite each other with the same phase, such that the phase difference between the two linear generators 10A is 180 degrees.

[0037] As described above, in the thermoacoustic power generation structure 1000 of this embodiment, the inner yokes 14 of the linear generators 10A of the two thermoacoustic power generation systems 100 are connected by a linkage mechanism 1100. Accordingly, the vibrations generated by the linear generators 10A of the two thermoacoustic power generation systems 100, which are arranged opposite each other in the same phase, can cancel each other out. Thus, the thermoacoustic power generation structure 1000 of this embodiment suppresses the vibration of the linear generators 10A through a simple structure.

[0038] Figure 2 yes Figure 1 A three-dimensional diagram of the linkage mechanism. Please refer to it. Figure 1 and Figure 2 In detail, the linkage mechanism 1100 of this embodiment includes four links L1, four links L2, and four joints J. Each of the four links L1 is pivotally connected to two other links L1 via two of the four joints J. The inner yoke 14 of each linear generator 10A is connected to the corresponding joint J via the link L2. The inner yoke 14 of one of the linear generators 10A of the two thermoacoustic power generation systems 100 and the inner yoke 14 of the other linear generator 10A of the two thermoacoustic power generation systems 100 are respectively connected to two opposite joints J of the four joints J.

[0039] If the stroke of the linear generator is too large, the thermoacoustic power generation system will be unable to generate sound waves. Therefore, when the heat input of the thermoacoustic power generation system changes, the stroke of the linear generator needs to be adjusted. The stroke of the linear generator can be adjusted by using a variable resistor or an electronic load device to change the load on the linear generator; however, this increases the number of components. In view of this, the thermoacoustic power generation structure 1000 of this embodiment can be as follows: Figure 1 The diagram includes two additional linear generators 10B, each connected to two opposite joints J of the four-joint mechanism J via a link L2, to generate electricity through the lifting and lowering of the linkage mechanism 1000. Accordingly, the stroke of the linear generator 10A can be adjusted by simply turning the linear generators 10B on or off, without increasing the number of components by adding a variable resistor or electronic load device.

[0040] Figure 3A and Figure 3B Show Figure 1 The linkage mechanism operates in a specific manner. Specifically, the linkage mechanism 1000 repeatedly operates in response to the vibration of the linear generator 10A. Figure 3A The state shown is the same as Figure 3B Between the states shown. Figure 3A In the state shown, the linear generator 10A on the left vibrates along direction D1, while the linear generator 10A on the right vibrates along direction D1', opposite to direction D1, thus canceling out the vibrations of the two linear generators 10A. Figure 3B In the state shown, the linear generator 10A on the left vibrates along direction D1' and the linear generator 10A on the right vibrates along direction D1, opposite to direction D1', so that the vibrations of the two linear generators 10A cancel each other out. Furthermore, during this operation, the linear generator 10B applies a load to the linkage mechanism 1100 along directions D2 and D2' to adjust the stroke of the linear generator 10A.

[0041] In summary, in the thermoacoustic power generation structure of this invention, a linkage mechanism is used to connect the inner yokes of the linear generators of the two thermoacoustic power generation systems. Accordingly, the vibrations generated by the linear generators of the two thermoacoustic power generation systems, which are arranged opposite each other with the same phase, can cancel each other out. Thus, the thermoacoustic power generation structure of this invention suppresses the vibration of the linear generators through a simple structure.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A thermoacoustic power generation structure, characterized in that, include: Two thermoacoustic power generation systems, each of which includes a linear generator, a ring tube, and a prime mover. The linear generator has a piston that vibrates back and forth within a cylinder to convert acoustic energy into electrical energy. The annular tube is connected to the linear generator via a resonant tube. The prime mover is located inside the annular pipe and includes a cooler, a heat accumulator, and a heater arranged in sequence. The linear generator has a permanent magnet, a coil, an inner yoke, and an outer yoke. The permanent magnet is disposed on the inner yoke, the piston is located at one end of the inner yoke, and the coil is disposed on the outer yoke. The thermoacoustic power generation structure further includes a linkage mechanism that connects the inner yoke of one of the two thermoacoustic power generation systems to the inner yoke of the other of the two thermoacoustic power generation systems. The two thermoacoustic power generation systems are arranged opposite each other with the same phase.

2. The thermoacoustic power generation structure according to claim 1, characterized in that, The linkage mechanism includes four links and four joints, each of the four links being connected to two other links via two of the four joints. The inner yoke of one of the two thermoacoustic power generation systems and the inner yoke of the other of the two thermoacoustic power generation systems are respectively connected to two opposite joints of the four joints.

3. The thermoacoustic power generation structure according to claim 2, characterized in that, It also includes two other linear generators, The other two linear generators are respectively connected to the other two opposite joints of the four joints to generate electricity through the lifting and lowering of the linkage mechanism.

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