Gas spring structure and thermo-acoustic generator

Abstract

This invention provides a gas spring structure and a thermoacoustic generator. The gas spring structure includes a main cylinder, a main piston, a gas spring cylinder, a gas spring piston, and a magnet support. The main cylinder has a compression chamber; the main piston is fitted inside the compression chamber and can reciprocate along the axis of the compression chamber; the gas spring cylinder is connected to the main cylinder; the gas spring piston is connected to the main piston, and a gas spring cavity is formed between the end of the gas spring piston away from the main piston and the gas spring cylinder; the magnet support is fitted outside the main cylinder, and one end of the magnet support is connected to the gas spring piston, with a permanent magnet on the magnet support; the main piston and the gas spring piston move synchronously, generating pressure fluctuations in the gas spring cavity, thereby changing the volume of the gas spring cavity. Through the above method, the gas spring piston and the gas spring cavity provide restoring force to the main piston, increasing the stiffness of the main piston, thus meeting the matching requirements between the linear motor and the thermoacoustic generator.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of thermoacoustic power generation, and in particular to a gas spring structure and a thermoacoustic generator. BACKGROUND

[0002] In a high-power thermoacoustic generator, as the mass of the moving part of the linear motor increases, the magnetic force spring or the mechanical leaf spring matched with the moving part cannot provide sufficient stiffness, and thus cannot meet the acoustic matching requirements between the linear motor and the engine. SUMMARY

[0003] The embodiments of the present application provide a gas spring structure and a thermoacoustic generator to solve the technical problem that the spring stiffness in the prior art cannot adapt to the requirements of a high-power thermoacoustic generator.

[0004] The embodiments of the present application provide a gas spring structure, which comprises a main cylinder provided with a compression cavity.

[0005] A main piston is sleeved in the compression cavity and can reciprocate along the axial direction of the compression cavity.

[0006] A gas spring cylinder is connected with the main cylinder.

[0007] A gas spring piston is connected with the main piston, and a gas spring cavity is formed between one end of the gas spring piston away from the main piston and the gas spring cylinder.

[0008] A magnet support is sleeved outside the main cylinder, one end of the magnet support is connected with the gas spring piston, and a permanent magnet is arranged on the magnet support.

[0009] The main piston and the gas spring piston move synchronously, a pressure fluctuation is generated in the gas spring cavity, and the volume of the gas spring cavity is changed.

[0010] According to the gas spring structure of one embodiment of the present application, a plurality of extension units are arranged on the side of the main cylinder facing the gas spring cylinder.

[0011] A plurality of perforations are arranged on the magnet support, and one end of the extension unit is arranged in the perforation and connected with the gas spring cylinder.

[0012] According to the gas spring structure of one embodiment of the present application, the circumferential dimension of the side of the extension unit close to the gas spring cylinder is greater than the circumferential dimension of the side of the extension unit away from the gas spring cylinder.

[0013] According to the gas spring structure of one embodiment of the present application, the plurality of extension units are arranged uniformly and at intervals along the circumferential direction of the main cylinder, and the number of the extension units corresponds to the number of the perforations one by one.

[0014] According to the gas spring structure of one embodiment of the present application, the cross-sectional dimension of the magnet holder decreases in the direction towards the gas spring cylinder.

[0015] According to the gas spring structure of one embodiment of the present application, the axial cross-sectional dimension of the gas spring cavity is greater than the axial cross-sectional dimension of the compression cavity.

[0016] According to the gas spring structure of one embodiment of the present application, the gas spring cylinder is integrally arranged with the main cylinder.

[0017] According to the gas spring structure of one embodiment of the present application, the gas spring cylinder is further provided with a cover plate on the side away from the main cylinder, and the cover plate and the gas spring cylinder together form the gas spring cavity.

[0018] According to the gas spring structure of one embodiment of the present application, the cover plate is provided with a mounting boss, the mounting boss is provided with a first matching part, and the gas spring cylinder is provided with a second matching part matched with the first matching part.

[0019] The embodiment of the present application further provides a thermoacoustic generator, comprising: a thermoacoustic engine;

[0020] The gas spring structure is connected with the thermoacoustic engine.

[0021] The gas spring structure and the thermoacoustic generator provided by the embodiment of the present application can generate an elastic restoring force for the main piston and the gas spring piston during the movement of the gas spring piston, play the role of the gas spring, increase the rigidity of the main piston and the gas spring piston, and meet the matching requirements between the linear motor and the thermoacoustic engine without affecting the normal work of the main piston and the gas spring piston. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 It is an angle of the gas spring structure of the embodiment of the present application, and the exploded structure view is shown.

[0024] Figure 2 It is a combined structure schematic view of the gas spring structure of the embodiment of the present application.

[0025] Figure 3 It isFigure 2 the top view shown in the figure;

[0026] Figure 4 for Figure 3 the sectional view at A-A shown in the figure;

[0027] Figure 5 for another embodiment of the gas spring structure of the present application;

[0028] Figure 6 for another embodiment of the gas spring structure of the present application;

[0029] Reference signs:

[0030] 10, main cylinder; 110, compression chamber; 120, flange; 130, extension unit;

[0031] 20, main piston;

[0032] 30, gas spring cylinder; 310, gas spring chamber; 320, cover plate; 3210, mounting boss; 3211, first matching part; 330, second matching part;

[0033] 40, gas spring piston;

[0034] 50, magnet support; 510, permanent magnet; 520, perforation. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0036] In the description of the embodiments of the present application, it should be noted that the orientations or positional relationships indicated by the terms “center”, “longitudinal”, “transverse”, “upper”, “lower”, “front”, “rear”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inner”, “outer” and the like are based on the orientations or positional relationships shown in the drawings, 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 indicated thereby must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on 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.

[0037] In the description of the embodiments of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "connected", "connected" should be understood in a broad sense, 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.

[0038] In the following Figures 1 to 6 The present application provides a gas spring structure, comprising a main cylinder 10, a main piston 20, a gas spring cylinder 30, a gas spring piston 40 and a magnet bracket 50, the main cylinder 10 is provided with a compression chamber 110, the main piston 20 is sleeved in the compression chamber 110 and can reciprocate along the axis direction of the compression chamber 110, the gas spring cylinder 30 is connected with the main cylinder 10, the gas spring piston 40 is connected with the main piston 20, the gas spring piston 40 is connected with the gas spring cylinder 30 at the end away from the main piston 20, and the gas spring chamber 310 is formed between the gas spring piston 40 and the gas spring cylinder 30, the magnet bracket 50 is sleeved outside the main cylinder 10, one end of the magnet bracket 50 is connected with the gas spring piston 40, and a permanent magnet 510 is arranged on the magnet bracket 50; wherein the main piston 20 and the gas spring piston 40 move synchronously, pressure fluctuation is generated in the gas spring chamber 310, and the volume of the gas spring chamber 310 is changed.

[0039] It should be noted that the main piston 20 is located in the main cylinder 10, one end of the main cylinder 10 is provided with a flange 120, the flange 120 is connected with a thermoacoustic engine, the other end of the main cylinder 10 is connected with the gas spring cylinder 30, and the main piston 20 moves synchronously with the gas spring piston 40. When the pressure wave generated by the thermoacoustic engine drives the main piston 20 to move, the main piston 20 drives the gas spring piston 40 to move, and the movement of the main piston 20 and the gas spring piston 40 changes the volume of the gas spring chamber 310, and then pressure fluctuation is generated in the gas spring chamber 310. For example, when the main piston 20 and the gas spring piston 40 move away from the direction of the thermoacoustic engine, the gas spring chamber 310 can be compressed, so that the pressure in the gas spring chamber 310 is increased. Conversely, when the main piston 20 and the gas spring piston 40 move towards the direction of the thermoacoustic engine, the pressure in the gas spring chamber 310 is reduced and can provide a resilient restoring force for the main piston 20 and the gas spring piston 40, which plays the role of a gas spring, thereby increasing the stiffness of the main piston 20 and the gas spring piston 40, and without affecting the normal work of the main piston 20 and the gas spring piston 40, it can meet the matching requirements between the linear motor and the thermoacoustic engine.

[0040] In the feasible embodiment of the present application, the main piston 20 and the gas spring piston 40 can be detachably connected by a screw fastener, or the main piston 20 and the gas spring piston 40 can be integrally arranged, which is not limited herein. Thus, the main piston 20 can drive the gas spring piston 40 to move synchronously during movement.

[0041] In the feasible embodiment of the present application, the main cylinder 10 is provided with a plurality of extending units 130 on the side facing the gas spring cylinder 30; the magnet support 50 is provided with a plurality of through holes 520, and the extending units 130 are arranged in the through holes 520 and connected with the gas spring cylinder 30. The extending units 130 are arranged outwardly in the direction away from the central axis of the main cylinder 10, and the size of the through holes 520 is matched with the size of the extending units 130.

[0042] Specifically, the circumferential size of the extending units 130 on the side close to the gas spring cylinder 30 is greater than the circumferential size on the side away from the gas spring cylinder 30, that is, the extending units 130 extend outwardly like a horn relative to the gas spring cylinder 30. Meanwhile, the cross-sectional size of the magnet support 50 decreases in the direction facing the gas spring cylinder 30, that is, the matching end of the magnet support 50 and the extending units 130 is arranged in a conical shape. When the main cylinder 10 and the magnet support 50 are installed, the magnet support 50 is clamped with the main cylinder 10, that is, after the extending units 130 are arranged in the through holes 520, the main cylinder 10 limits the position of the magnet support 50 to prevent the magnet support 50 from being separated from the main cylinder 10.

[0043] Further, for the extending units 130, the extending units 130 are uniformly and spacedly arranged along the circumferential direction of the main cylinder 10, and the number of the extending units 130 is matched with the number of the through holes 520. For example, the extending units 130 are rectangular extending blocks in the length extension direction, and the through holes 520 are rectangular holes matched with the size of the rectangular extending blocks. In the feasible embodiment of the present application, the number of the extending units 130 can be 4, 6 or 8, and the number of the through holes 520 can also be 4, 6 or 8. The specific number of the extending units 130 and the through holes 520 is only exemplified herein, and is not limited herein.

[0044] It should be noted that the axial cross-sectional size of the gas spring cavity 310 is greater than the axial cross-sectional size of the compression cavity 110. When the main piston 20 moves in the compression cavity 110 along the central axis of the compression cavity 110, the outer circumferential surface of the main piston 20 is fitted with the inner wall of the compression cavity 110; similarly, the outer circumferential wall of the gas spring piston 40 is fitted with the outer circumferential wall of the gas spring cavity 310. Preferably, the axial cross-sectional size of the gas spring cavity 310 is greater than the axial cross-sectional size of the compression cavity 110, so that the volume of the gas spring cavity 310 per unit distance is greater, thereby improving the gas spring restoring force generated by the gas spring cavity 310.

[0045] In an embodiment of the present application, the gas spring cylinder 30 is integrally arranged with the main cylinder 10. In other embodiments, the gas spring cylinder 30 and the main cylinder 10 can also be detachably connected. For example, the gas spring cylinder 30 and the main cylinder 10 can be detachably connected by screw fasteners, or by adhesive, etc., which is not limited herein. The detachable arrangement of the gas spring cylinder 30 and the main cylinder 10 facilitates the production cost and the later maintenance cost of the gas spring cylinder 30 and the main cylinder 10.

[0046] In an embodiment of the present application, the gas spring cylinder 30 is integrally arranged with the main cylinder 10. In other embodiments, the gas spring cylinder 30 and the main cylinder 10 can also be detachably connected. For example, the gas spring cylinder 30 and the main cylinder 10 can be detachably connected by screw fasteners, or by adhesive, etc., which is not limited herein. The detachable arrangement of the gas spring cylinder 30 and the main cylinder 10 facilitates the production cost and the later maintenance cost of the gas spring cylinder 30 and the main cylinder 10.

[0047] Please refer to Figure 5 and Figure 6 When the cover plate 320 is detachably connected with the gas spring cylinder 30, the cover plate 320 can be a circular cover plate 320, or a motor back cover can be selected. The circular cover plate 320 and the gas spring cylinder 30 can be connected by adhesive. Or in other embodiments, when the cover plate 320 is selected as a motor back cover, the pressure of the gas spring cavity 310 will act on the cover plate 320. The motor back cover is not directly fixedly connected with the gas spring cylinder 30, so that the force will not be transmitted to the gas spring cylinder 30, thereby preventing the deformation of the gas spring cylinder 30.

[0048] Further, when the cover plate 320 is selected as a motor back cover, the cover plate 320 is provided with a mounting boss 3210, the mounting boss 3210 is provided with a first matching part 3211, and the gas spring cylinder 30 is provided with a second matching part 330 corresponding to the first matching part 3211. In an embodiment of the present application, the second matching part 330 is an end of the gas spring cylinder 30 facing the cover plate 320, and the first matching part 3211 is a notch corresponding to the second matching part 330, thereby facilitating the connection of the gas spring cylinder 30 and the cover plate 320. At the same time, the second matching part 330 is provided with a platform at one end, thereby facilitating the installation stability of the gas spring cylinder 30 and the cover plate 320.

[0049] In the feasible embodiment of the present application, the present application also provides a thermoacoustic generator, comprising a thermoacoustic engine and a gas spring structure, which are connected. The thermoacoustic engine comprises a heater, a regenerator, a water cooler and the like, an external heat source inputs heat to the thermoacoustic engine through the heater, the temperature of the heater is increased, and the external heat source carries away heat through the water cooler to maintain the water cooler at a lower temperature. When the temperature difference between the heater and the water cooler reaches a certain value, a certain temperature gradient is formed in the regenerator, and the gas in the system produces self-excited acoustic oscillation, and converts thermal energy into mechanical energy in the form of acoustic waves. The acoustic waves push the main piston 20 to reciprocate, drive the permanent magnet 510 to change the magnetic flux of the stator coil, induce electric energy, and thus complete the conversion from mechanical energy to electric energy. During this period, the main piston 20 and the gas spring piston 40 can generate an elastic restoring force during the movement of the gas spring piston 40, play the role of the gas spring, and thus increase the stiffness of the main piston 20 and the gas spring piston 40, and can match the matching requirements between the linear motor and the thermoacoustic engine without affecting the normal work of the main piston 20 and the gas spring piston 40.

[0050] In summary, the present application provides a gas spring structure, the main piston 20 and the gas spring piston 40 can generate an elastic restoring force during the movement of the gas spring piston 40, play the role of the gas spring, and thus increase the stiffness of the main piston 20 and the gas spring piston 40, and can match the matching requirements between the linear motor and the thermoacoustic engine without affecting the normal work of the main piston 20 and the gas spring piston 40.

[0051] In the embodiment of the present application, unless otherwise 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.

[0052] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In the present specification, 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 appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present specification and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0053] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and 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 that: 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 solution deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A gas spring structure, characterized by, include: The main cylinder is equipped with a compression chamber; The main piston is fitted inside the compression chamber and can reciprocate along the axial direction of the compression chamber; A gas spring cylinder is connected to the main cylinder; A gas spring piston is connected to the main piston, and a gas spring cavity is formed between the end of the gas spring piston away from the main piston and the gas spring cylinder. A magnet bracket is sleeved on the outside of the main cylinder, one end of the magnet bracket is connected to the gas spring piston, and a permanent magnet is provided on the magnet bracket; wherein... The main piston moves synchronously with the gas spring piston, generating pressure fluctuations in the gas spring cavity and thus changing the volume of the gas spring cavity. The main cylinder is provided with multiple extension units on the side facing the gas spring cylinder; The magnet support has multiple through holes, and one end of the protruding unit passes through the through holes and is connected to the gas spring cylinder.

2. The gas spring structure according to claim 1, characterized by The circumferential dimension of the protruding unit on the side closer to the gas spring cylinder is greater than the circumferential dimension on the side farther away from the gas spring cylinder.

3. The gas spring structure according to claim 1, wherein The multiple protruding units are evenly spaced along the circumference of the main cylinder, and the number of the protruding units corresponds one-to-one with the number of the perforations.

4. The gas spring structure according to claim 1, wherein The cross-sectional dimensions of the magnet support decrease along the direction toward the gas spring cylinder.

5. The gas spring structure according to claim 1, wherein The axial cross-sectional dimension of the gas spring cavity is larger than that of the compression cavity.

6. The gas spring structure according to claim 1, wherein The gas spring cylinder is integrally formed with the main cylinder.

7. The gas spring structure according to claim 1, wherein The gas spring cylinder is also provided with a cover plate on the side away from the main cylinder, and the cover plate and the gas spring cylinder enclose each other to form the gas spring cavity.

8. The gas spring structure according to claim 7, wherein The cover plate is provided with a mounting boss, the mounting boss is provided with a first mating part, and the gas spring cylinder is provided with a second mating part that is adapted to the first mating part.

9. A thermo-acoustic power generator, characterized in that include: Thermoacoustic engine; The gas spring structure according to any one of claims 1-8, wherein the thermoacoustic engine is connected to the gas spring structure.

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