Gas spring phase adjuster and thermo-acoustic generator

Abstract

The application provides a gas spring phase modifier and a thermoacoustic generator, wherein the gas spring phase modifier comprises a flange, a room temperature side cylinder, a room temperature side piston, a room temperature side wall, a high temperature side cylinder and a high temperature side piston; the room temperature side cylinder is connected with a first end surface of the flange, so that the flange, the room temperature side cylinder and the room temperature side piston form a first room temperature spring cavity; the room temperature side wall is connected with the first end surface of the flange, so that the flange, the room temperature side cylinder, the room temperature side piston and the room temperature side wall form a second room temperature spring cavity; the high temperature side cylinder is connected with a second end surface of the flange, the flange, the high temperature side cylinder and the high temperature side piston form an empty volume, and a first air hole is arranged on the high temperature side cylinder at a position corresponding to the empty volume. The gas spring phase modifier can effectively solve the problem that the deformation of the high temperature side cylinder and piston is difficult to control due to temperature rise in the prior art, and the performance of the gas spring phase modifier is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermoacoustic equipment, and particularly relates to a gas spring phase adjuster and a thermoacoustic generator. BACKGROUND

[0002] Thermoacoustic technology is a technology for realizing energy conversion between heat energy and sound waves (the sound wave is a kind of mechanical energy). In order to obtain ideal conversion efficiency, a key component (mainly a regenerator) in a thermoacoustic device must obtain a specific phase relationship of the sound field, and therefore a phase adjuster is an essential component in the thermoacoustic device. For a small-power thermoacoustic device, the phase adjuster mainly adopts a resonant structure composed of a spring piston to adjust the phase. With the increase of the power of the thermoacoustic device, the moving mass of the phase adjuster will be increased accordingly. In order to obtain large stiffness, the thickness of the leaf spring must be increased, but the corresponding deformation amount will be reduced, and the requirements of large stiffness and large displacement in the large-power device cannot be met at the same time. Therefore, a gas spring phase adjuster is designed.

[0003] However, the gas spring phase adjuster of the existing structure generally includes two gas spring cavities of a high-temperature side and a room-temperature side. The high-temperature side gas spring cavity is adjacent to the high-temperature heat exchanger through a thin-walled cylinder, and therefore the high-temperature hot gas can easily heat the piston and the cylinder around the high-temperature side gas spring cavity, and the deformation of the cylinder and the piston of the high-temperature side caused by the temperature rise is difficult to control, and further causes the poor cooperation of the piston and the cylinder, and seriously affects the performance of the phase adjuster. SUMMARY

[0004] The present application provides a gas spring phase adjuster to solve the problem that the deformation of the cylinder and the piston of the high-temperature side caused by the temperature rise is difficult to control in the prior art, and improves the performance of the gas spring phase adjuster.

[0005] The present application provides a gas spring phase adjuster, which comprises a flange, a room-temperature side cylinder, a room-temperature side piston, a room-temperature side wall, a high-temperature side cylinder and a high-temperature side piston. The room-temperature side cylinder is connected with a first end surface of the flange. The room-temperature side piston is arranged in the room-temperature side cylinder, so that a first room-temperature spring cavity is formed among the flange, the room-temperature side cylinder and the room-temperature side piston. The room-temperature side wall is connected with the first end surface of the flange, and is arranged outside the room-temperature side cylinder, so that a second room-temperature spring cavity is formed among the flange, the room-temperature side cylinder, the room-temperature side piston and the room-temperature side wall. The high-temperature side cylinder is connected with a second end surface of the flange. The high-temperature side piston is arranged in the high-temperature side cylinder. An empty volume is formed among the flange, the high-temperature side cylinder and the high-temperature side piston. A first air hole is arranged on the high-temperature side cylinder at a position corresponding to the empty volume.

[0006] The gas spring phase modifier further comprises a piston shaft, the flange is provided with a shaft hole through which the piston shaft passes, a first end of the piston shaft is connected with the room temperature side piston through the shaft hole, and a second end of the piston shaft is connected with the high temperature side piston.

[0007] The gas spring phase modifier further comprises a thin-walled cylinder and a radiation-proof screen, the thin-walled cylinder is connected with the high temperature side piston, the radiation-proof screen is arranged in the interior of the thin-walled cylinder, and the radiation-proof screen is connected with the thin-walled cylinder.

[0008] The gas spring phase modifier further comprises a high temperature side shell, the high temperature side shell is connected with the second end surface of the flange, the high temperature side cylinder and the thin-walled cylinder are arranged in the interior of the high temperature side shell, so that an expansion cavity is formed among the high temperature side shell, the high temperature side cylinder and the thin-walled cylinder.

[0009] The gas spring phase modifier further comprises a room temperature side shell and a motor piston, the room temperature side shell is connected with the first end surface of the flange, the room temperature side wall surface and the motor piston are arranged in the interior of the room temperature side shell, so that a compression cavity is formed among the room temperature side shell, the flange, the room temperature side wall surface and the motor piston.

[0010] The gas spring phase modifier is provided with a second air hole on the flange, the second air hole penetrates the first end surface and the second end surface of the flange, one end of the second air hole is connected with the exterior of the high temperature side cylinder, and the other end of the second air hole is connected with the compression cavity.

[0011] The gas spring phase modifier is provided with a second air hole on the flange, the second air hole penetrates the first end surface and the second end surface of the flange, one end of the second air hole is connected with the exterior of the high temperature side cylinder, and the other end of the second air hole is connected with the second room temperature spring cavity; an air pipe is arranged in the interior of the second room temperature spring cavity, one end of the air pipe is connected with the second air hole, and the other end of the air pipe is connected with the compression cavity through the room temperature side wall surface.

[0012] The gas spring phase modifier further comprises a water cooler, a regenerator and a high temperature heat exchanger which are arranged in the high temperature side shell and connected in sequence, the water cooler, the regenerator and the high temperature heat exchanger are arranged outside the high temperature side cylinder, the water cooler is close to the flange, and the high temperature heat exchanger is away from the flange.

[0013] According to the gas spring phase adjuster provided by the application, the room temperature side piston is a cylinder structure with one end closed and the other end open, and the open end of the room temperature side piston faces the flange; the high temperature side piston is a cylinder structure with one end closed and the other end open, and the open end of the high temperature side piston faces away from the flange.

[0014] The application further provides a thermoacoustic generator comprising the gas spring phase adjuster.

[0015] The one or more technical solutions in the application have at least one of the following technical effects:

[0016] The gas spring phase adjuster provided by the application comprises a flange, a room temperature side cylinder, a room temperature side piston, a room temperature side wall, a high temperature side cylinder and a high temperature side piston, the room temperature side cylinder is connected to the first end surface of the flange, the room temperature side piston is arranged in the room temperature side cylinder and is in sliding fit with the room temperature side cylinder, so that the first room temperature spring cavity is formed between the flange, the room temperature side cylinder and the room temperature side piston; the room temperature side wall is connected to the first end surface of the flange, and the room temperature side wall is arranged outside the room temperature side cylinder, so that the second room temperature spring cavity is formed between the flange, the room temperature side cylinder, the room temperature side piston and the room temperature side wall; the high temperature side cylinder is connected to the second end surface of the flange, the high temperature side piston is arranged in the high temperature side cylinder and is in sliding fit with the high temperature side cylinder, so that the empty volume is formed between the high temperature side cylinder and the high temperature side piston, and the first air hole is arranged on the high temperature side cylinder at a position corresponding to the empty volume. Thus, the gas spring phase adjuster provided by the application is provided with the first air hole on the high temperature side cylinder, which is in communication with the empty volume, so that the empty volume of the high temperature side loses the original function of the gas spring, the first room temperature spring cavity and the second room temperature spring cavity are arranged on the room temperature side, and when the room temperature side piston reciprocates, the pressure in the first room temperature spring cavity and the second room temperature spring cavity is changed simultaneously, the first room temperature spring cavity and the second room temperature spring cavity are arranged on the room temperature side and are not easy to be heated, so that the sealing gap between the room temperature side cylinder and the room temperature side piston can be kept stable, and the problem of deformation due to heating is avoided, and the performance of the gas spring phase adjuster is improved.

[0017] The thermoacoustic generator provided by the application comprises the gas spring phase adjuster. The thermoacoustic generator has all the advantages of the gas spring phase adjuster, and the use performance of the thermoacoustic generator is improved.

[0018] Additional aspects and advantages of the application will be made apparent by the following description. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to make the technical solutions in the present application or prior art clearer, the accompanying drawings needed in the embodiments or prior art description will be briefly introduced. Obviously, the accompanying drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort based on these drawings.

[0020] Figure 1 is a structural schematic diagram of the gas spring phase adjuster provided by the present application;

[0021] Figure 2 is another structural schematic diagram of the gas spring phase adjuster provided by the present application.

[0022] Reference signs:

[0023] 1: flange; 2: high-temperature side cylinder; 3: room-temperature side cylinder;

[0024] 4: high-temperature side piston; 5: room-temperature side piston; 6: shaft hole;

[0025] 7: piston shaft; 8: empty volume; 9: first room-temperature spring cavity;

[0026] 10: thin-walled cylinder; 11: radiation-proof screen; 12: water cooler;

[0027] 13: regenerator; 14: high-temperature heat exchanger; 15: expansion cavity;

[0028] 16: compression cavity; 17: second air vent; 18: motor piston;

[0029] 19: room-temperature side wall surface; 20: first air vent; 21: second room-temperature spring cavity;

[0030] 22: high-temperature side shell; 23: room-temperature side shell; 24: air vent pipeline. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be further described in detail below in combination with the accompanying drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0032] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", "third" are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0033] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] In the embodiments of the present application, unless otherwise explicitly specified and limited, the first feature is "on" or "under" the second feature, which can be direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Moreover, the first feature "above", "above" and "above" the second feature can be directly above or obliquely above the first feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" the second feature can be directly below or obliquely below the first feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0035] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in the present application and the features of different embodiments or examples without contradiction.

[0036] The following will be described in conjunction with Figure 1 and Figure 2 The specific embodiments of the gas spring phase shifter of the present application are described.

[0037] The gas spring phase adjuster of the embodiment of the present application comprises a flange 1, a room temperature side cylinder 3, a room temperature side piston 5, a room temperature side wall 19, a high temperature side cylinder 2 and a high temperature side piston 4. The room temperature side cylinder 3 is connected to the first end surface of the flange 1. The room temperature side piston 5 is arranged in the room temperature side cylinder 3 and is in sliding sealing cooperation with the room temperature side cylinder 3, so that the first room temperature spring cavity 9 is formed between the flange 1, the room temperature side cylinder 3 and the room temperature side piston 5. The room temperature side wall 19 is connected to the first end surface of the flange 1 and is arranged outside the room temperature side cylinder 3, so that the second room temperature spring cavity 21 is formed between the flange 1, the room temperature side cylinder 3, the room temperature side piston 5 and the room temperature side wall 19. The high temperature side cylinder 2 is connected to the second end surface of the flange 1. The high temperature side piston 4 is arranged in the high temperature side cylinder 2 and is in sliding cooperation with the high temperature side cylinder 2, so that the empty volume 8 is formed between the high temperature side cylinder 2, the high temperature side piston 4 and the flange 1. The first air hole 20 is arranged on the high temperature side cylinder 2 and is in communication with the empty volume 8. That is, one end of the first air hole 20 is in communication with the empty volume 8 and the other end of the first air hole 20 is in communication with the space outside the empty volume 8.

[0038] That is, the gas spring phase adjuster of the embodiment of the present application is provided with the first air hole 20 arranged on the high temperature side cylinder 2 and in communication with the empty volume 8, so that the empty volume 8 of the high temperature side loses the original function of the gas spring. Meanwhile, the gas spring phase adjuster of the embodiment of the present application is provided with the first room temperature spring cavity 9 and the second room temperature spring cavity 21 arranged on the room temperature side. When the room temperature side piston 5 reciprocates, the pressure in the first room temperature spring cavity 9 and the second room temperature spring cavity 21 can be changed simultaneously. Since the first room temperature spring cavity 9 and the second room temperature spring cavity 21 are arranged on the room temperature side, that is, far away from the high temperature side, they are not easy to be heated, so that the sealing gap between the room temperature side cylinder 3 and the room temperature side piston 5 can be kept stable, thereby avoiding the problem of temperature deformation and improving the performance of the gas spring phase adjuster.

[0039] In some embodiments of the present application, the gas spring phase adjuster further comprises a piston shaft 7. The flange 1 is provided with a shaft hole 6 through which the piston shaft 7 passes. One end of the piston shaft 7 passes through the shaft hole 6 and is connected to the room temperature side piston 5. The other end of the piston shaft 7 is connected to the high temperature side piston 4. That is, the piston shaft 7 is in sliding sealing cooperation with the shaft hole 6. Through the reciprocating movement of the piston shaft 7 in the shaft hole 6, the room temperature side piston 5 and the high temperature side piston 4 can be driven to reciprocate synchronously.

[0040] In some embodiments of the present invention, the gas spring phase adjuster further includes a thin-walled cylinder 10 and a radiation shield 11, wherein the thin-walled cylinder 10 is connected to the high-temperature side piston 4, and the radiation shield 11 is disposed inside the thin-walled cylinder 10 and connected to the inner wall of the thin-walled cylinder 10. That is, by providing the thin-walled cylinder 10, a thermal buffering effect can be achieved. By providing one or more layers of radiation shields 11 inside the thin-walled cylinder 10, radiative heat transfer between the thin-walled cylinder 10 and the high-temperature side piston 4 can be reduced.

[0041] In some embodiments of the present invention, the gas spring phase adjuster further includes a high-temperature side housing 22, which is connected to the second end face of the flange 1. The high-temperature side cylinder 2 and the thin-walled cylinder 10 are both disposed inside the high-temperature side housing 22, so that an expansion cavity 15 is formed between the high-temperature side housing 22, the high-temperature side cylinder 2, and the thin-walled cylinder 10. That is, the expansion cavity 15 is located inside the high-temperature side housing 22 at a position away from the flange 1.

[0042] The gas spring phase adjuster also includes a room temperature side housing 23 and a motor piston 18. The room temperature side housing 23 is connected to the first end face of the flange 1. The room temperature side wall 19 and the motor piston 18 are both disposed inside the room temperature side housing 23, so that a compression chamber 16 is formed between the room temperature side housing 23, the flange 1, the room temperature side wall 19, and the motor piston 18. That is, the motor piston 18 is in sliding sealing fit with the interior of the room temperature side housing 23, and the motor piston 18 is disposed inside the room temperature side housing 23 at a position away from the flange 1.

[0043] In some embodiments of the present invention, such as Figure 1 As shown, a second vent hole 17 can be provided on the flange 1. The second vent hole 17 penetrates the first end face and the second end face of the flange 1, and one end of the second vent hole 17 is connected to the outside of the high-temperature side cylinder 2, while the other end of the second vent hole 17 is connected to the compression chamber 16. That is, the empty volume 8 can be connected to the second vent hole 17 through the first vent hole 20, and then to the compression chamber 16 through the second vent hole 17.

[0044] During operation, the air guiding effect of the first vent 20 and the second vent 17 makes the pressure fluctuation of the empty volume 8 and the expansion chamber 15 close. Therefore, there is no need for high sealing requirements between the high-temperature side cylinder 2 and the high-temperature side piston 4. During manufacturing, the gap between the high-temperature side cylinder 2 and the high-temperature side piston 4 can be set to be large, which greatly reduces the difficulty of processing and manufacturing. Even if the high-temperature side cylinder 2 and the high-temperature side piston 4 still have a certain temperature rise, it will not have a significant impact on the performance of the gas spring phase adjuster.

[0045] In other embodiments of the invention, such as Figure 2As shown, a second vent hole 17 can also be provided on the flange 1, which penetrates the first end face and the second end face of the flange 1, and one end of the second vent hole 17 is in communication with the outside of the high-temperature side cylinder 2, and the other end of the second vent hole 17 is in communication with the second room-temperature spring cavity 21. A vent pipe 24 is provided in the inside of the second room-temperature spring cavity 21, one end of the vent pipe 24 is in communication with the second vent hole 17, and the other end of the vent pipe 24 is in communication with a compression cavity (not shown in the figure) through the room-temperature side wall face 19. That is, the empty volume 8 can be in communication with the second vent hole 17 through the first vent hole 20, and then in communication with the compression cavity through the second vent hole 17 and the vent pipe 24. In this embodiment, the diameter of the room-temperature side wall face 19 can be set to be larger, so as to increase the volume of the second room-temperature spring cavity 21, thereby meeting the use requirements.

[0046] Similarly, in operation, under the gas guiding effect of the first vent hole 20, the second vent hole 17 and the vent pipe 24, the pressure fluctuation of the empty volume 8 and the expansion cavity 15 is close, and therefore the sealing requirement between the high-temperature side cylinder 2 and the high-temperature side piston 4 is not high, and the gap between the high-temperature side cylinder 2 and the high-temperature side piston 4 can be set to be larger in manufacturing, thereby greatly reducing the difficulty of processing and manufacturing, and even if the high-temperature side cylinder 2 and the high-temperature side piston 4 still have a certain temperature rise, it will not have a great impact on the performance of the gas spring phase adjuster.

[0047] In some embodiments of the present application, the gas spring phase adjuster further comprises a water cooler 12, a regenerator 13 and a high-temperature heat exchanger 14 which are sequentially connected and arranged in the high-temperature side housing 22, and the water cooler 12, the regenerator 13 and the high-temperature heat exchanger 14 are all arranged outside the high-temperature side cylinder 2. The water cooler 12 is arranged close to the flange 1, and there is a gap between the water cooler 12 and the flange 1, so that the first vent hole 20 can be in communication with the second vent hole 17, and the water cooler 12 can be in communication with the second vent hole 17. The high-temperature heat exchanger 14 is arranged away from the flange 1, so that the high-temperature heat exchanger 14 is in communication with the expansion cavity 15.

[0048] Specifically, the room-temperature side piston 5 is a cylinder structure with one end closed and the other end open, and the open end of the room-temperature side piston 5 faces the flange 1, thereby facilitating the formation of the second room-temperature spring cavity 21.

[0049] Specifically, the high-temperature side piston 4 is a cylinder structure with one end closed and the other end open, and the open end of the high-temperature side piston 4 faces away from the flange 1, thereby facilitating the installation with the thin-walled cylinder 10.

[0050] In another aspect, the embodiment of the present application also provides a thermoacoustic generator comprising the gas spring phase adjuster of the above embodiment. Since the thermoacoustic generator is provided with the gas spring phase adjuster of the above embodiment, the thermoacoustic generator has all the advantages of the gas spring phase adjuster of the above embodiment, and the use performance of the thermoacoustic generator is improved.

[0051] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A gas spring phase adjuster, characterized in that, The system includes a flange, a room temperature side cylinder, a room temperature side piston, a room temperature side wall, a high temperature side cylinder, and a high temperature side piston. The room temperature side cylinder is connected to the first end face of the flange. The room temperature side piston is disposed inside the room temperature side cylinder, forming a first room temperature spring cavity between the flange, the room temperature side cylinder, and the room temperature side piston. The room temperature side wall is connected to the first end face of the flange and is disposed outside the room temperature side cylinder, forming a second room temperature spring cavity between the flange, the room temperature side cylinder, the room temperature side piston, and the room temperature side wall. The high temperature side cylinder is connected to the second end face of the flange. The system includes a high-temperature side piston disposed within a high-temperature side cylinder, forming an empty volume between the flange, the high-temperature side cylinder, and the high-temperature side piston. A first vent hole is provided on the high-temperature side cylinder at a position corresponding to the empty volume. The system also includes a piston shaft, with a shaft hole through which the piston shaft passes. A first end of the piston shaft passes through the shaft hole and connects to the room-temperature side piston, while a second end of the piston shaft connects to the high-temperature side piston. Furthermore, the system includes a thin-walled cylinder and a radiation shield. The thin-walled cylinder is connected to the high-temperature side piston, and the radiation shield is disposed inside the thin-walled cylinder and connected to it.

2. The gas spring phase adjuster according to claim 1, characterized in that, It also includes a high-temperature side housing, which is connected to the second end face of the flange. The high-temperature side cylinder and the thin-walled cylinder are both disposed inside the high-temperature side housing, so that an expansion cavity is formed between the high-temperature side housing, the high-temperature side cylinder and the thin-walled cylinder.

3. The gas spring phase adjuster according to claim 2, characterized in that, It also includes a room temperature side housing and a motor piston. The room temperature side housing is connected to the first end face of the flange. The room temperature side wall and the motor piston are both disposed inside the room temperature side housing, so that a compression chamber is formed between the room temperature side housing, the flange, the room temperature side wall and the motor piston.

4. The gas spring phase adjuster according to claim 3, characterized in that, A second vent hole is provided on the flange, which penetrates the first end face and the second end face of the flange. One end of the second vent hole is connected to the outside of the high-temperature side cylinder, and the other end of the second vent hole is connected to the compression chamber.

5. The gas spring phase adjuster according to claim 3, characterized in that, A second vent hole is provided on the flange, which penetrates the first end face and the second end face of the flange. One end of the second vent hole is connected to the outside of the high-temperature side cylinder, and the other end of the second vent hole is connected to the second room temperature spring cavity. A vent pipe is provided inside the second room temperature spring cavity. One end of the vent pipe is connected to the second vent hole, and the other end of the vent pipe passes through the room temperature side wall and is connected to the compression cavity.

6. The gas spring phase adjuster according to any one of claims 2 to 5, characterized in that, It also includes a water cooler, a regenerator and a high-temperature heat exchanger disposed in the high-temperature side shell and connected in sequence. The water cooler, the regenerator and the high-temperature heat exchanger are all disposed outside the high-temperature side cylinder, with the water cooler close to the flange and the high-temperature heat exchanger away from the flange.

7. The gas spring phase adjuster according to any one of claims 1 to 5, characterized in that, The room temperature side piston is a cylindrical structure with one end closed and the other end open, with the open end of the room temperature side piston facing the flange; the high temperature side piston is a cylindrical structure with one end closed and the other end open, with the open end of the high temperature side piston facing away from the flange.

8. A thermoacoustic generator, characterized in that, include: The gas spring phase adjuster as described in any one of claims 1 to 7.

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