CN218062484U - Stirling generator - Google Patents

Abstract

The utility model relates to a stirling generator technical field provides a stirling generator, including stirling engine, stirling engine includes the front end casing, heating element, regenerator and cooling module, the inside of front end casing is equipped with the piston chamber, heating element, regenerator and cooling module set gradually in the outside in piston chamber along the axial in piston chamber, at least one among heating element and the cooling module includes the heat exchange tube, many heat exchange tubes encircle the piston chamber and arrange the setting, and the axial extension in piston chamber is followed to every heat exchange tube, piston chamber and heat exchange tube intercommunication, heating element, regenerator and cooling module communicate in proper order. The diameter of the front end shell is reduced, the thermal stress of the front end shell is reduced, and the condition of thermal stress concentration is effectively relieved. The problem of front end shell stress concentration in the generator structure can be effectively improved while the performance of the generator is guaranteed, the service life of the front end shell material of the generator is prolonged, and then the construction of a high-power space power supply is promoted.

Description

Stirling generator

Technical Field

The utility model relates to a stirling generator technical field provides a stirling generator.

Background

The free piston Stirling generator adopts Stirling cycle, absorbs heat of an external heat source by using a heater, converts the heat into work, and releases redundant heat through a cooler. The heater, the regenerator, heat transfer parts such as cooler axial is installed in generator front end casing, front end casing one end is in high temperature, one end is in low temperature, the difference in temperature of heater and cooler can make the front end casing of generator produce very big thermal stress, the difference of front end casing and heat exchanger material thermal expansion coefficient has produced very big thermal stress to the casing promptly, and the diameter along with the generator is big more, the increase of casing diameter, this thermal stress concentration's problem is more serious, and the material on the present market is difficult to satisfy stress and life-span demand. Meanwhile, the shell of the generator is filled with high-pressure gas working medium, and the generator generates high-frequency oscillation pressure waves during operation, so that the stress borne by the shell at the front end of the generator is increased. The stress problem greatly limits the development of the free piston Stirling generator to high power, influences the construction of a space high-power Stirling power station, and therefore the structure of the generator needs to be properly improved to reduce the stress.

There are several methods to reduce stress: 1) Reducing the gas pressure; 2) Increasing the thickness of the shell; 3) The hot end temperature is reduced. Simulation shows that thermal stress in the front end housing is a main factor, and the effect of reducing the gas pressure on reducing the front end housing stress is small. Although the stress of the front-end shell can be reduced to a certain extent by increasing the thickness of the shell, the thickening of the shell greatly increases the heat loss and reduces the efficiency of the generator. The development of free piston stirling generators is now towards high temperature regions, which means that the temperature at the hot end of the generator needs to be raised further. Meanwhile, the temperature of the hot end of the generator is reduced to have negative effects on the efficiency of the generator, and in conclusion, the method is not feasible.

SUMMERY OF THE UTILITY MODEL

The utility model provides a stirling generator for solve one of the technical problem that exists among the prior art, realize under the prerequisite of guaranteeing the generator performance, reduce the effect of the thermal stress of front end casing, effectively slow down the problem of thermal stress concentration.

The utility model provides a Stirling generator, including Stirling engine, stirling engine includes front end casing, heating element, regenerator and cooling element, the inside of front end casing is equipped with the piston chamber, heating element the regenerator with cooling element follows the axial in piston chamber set gradually in the outside in piston chamber, heating element with at least one among the cooling element includes the heat exchange tube, many the heat exchange tube encircles the piston chamber is arranged and is set up, and every the heat exchange tube is followed the axial extension in piston chamber, the piston chamber with the heat exchange tube intercommunication, heating element the regenerator with cooling element communicates in proper order.

According to the utility model provides a pair of stirling generator, the heat exchange tube is slit formula heat exchanger.

According to the utility model provides a pair of stirling generator, the front end casing includes shell body and interior casing, the shell body cover is located the outside of interior casing, the inside of interior casing is enclosed out the piston chamber, interior casing with enclose out heat transfer channel between the front end casing, the both ends in piston chamber respectively with heat transfer channel's both ends intercommunication, heating element the regenerator with cooling element set up in the heat transfer channel.

According to the utility model provides a pair of stirling generator, heating element still includes the heat source heating element includes under the condition of heat exchange tube, the heat source cover is located the heat exchange tube outside.

According to the utility model provides a pair of stirling generator, the heat source is the fluid heat source, the shell body is corresponding the position of heat exchange tube is equipped with first cavity, the fluid heat source set up in the first cavity.

According to the utility model provides a pair of stirling generator, cooling module still includes the cold source cooling module includes under the condition of heat exchange tube, the cold source cover is located the heat exchange tube outside.

According to the utility model provides a pair of stirling generator, the cold source is fluid cold source, the shell body is corresponding the position of heat exchange tube is equipped with the second cavity, the fluid cold source set up in the second cavity.

According to the utility model provides a pair of stirling generator, the shell body is close to heating element's one end is the blind end, the piston chamber is in the blind end pass through the runner with heat transfer channel intercommunication.

According to the utility model provides a pair of stirling generator, stirling still includes rear end casing, piston device and spring assembly, piston device set up in the piston intracavity, the rear end casing with front end casing connects, spring assembly set up in the rear end casing, piston device with spring assembly connects.

According to the utility model provides a pair of stirling generator still includes linear electric motor, linear electric motor set up in the rear end casing, and be located cooling module with between the spring unit.

The utility model provides a stirling generator, at least one among heating element and the cooling element includes the heat exchange tube, and a plurality of heat exchange tube axial extension, and closely arrange to encircle and set up in the outside in piston chamber, encircle to arrange into the great integral type heat exchanger of a whole replacement diameter of an annular promptly through using the less heat exchange tube of a plurality of diameter to make through using the less heat exchange tube of a plurality of diameter the utility model discloses a heat transfer structure and gas working medium's heat transfer area compare promote by a wide margin in the heat exchanger of integral type, and cold and hot end heat transfer ability is stronger. Meanwhile, the structure is beneficial to reducing the diameter of the front-end shell, reducing the thermal stress of the front-end shell, relieving the condition of thermal stress concentration, effectively improving the problem of stress concentration of the front-end shell in the generator structure while ensuring the performance of the generator, prolonging the service life of the front-end shell material of the generator, and further promoting the construction of a high-power space power supply.

In addition to the technical problems addressed by the present invention, the technical features of the constituent technical solutions, and the advantages brought by the technical features of these technical solutions, which have been described above, other technical features of the present invention and the advantages brought by these technical features will be further described with reference to the accompanying drawings, or can be learned by practice of the present invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only 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 Stirling generator according to the present invention;

fig. 2 is a second schematic structural diagram of the stirling generator provided by the present invention;

FIG. 3 is a schematic cross-sectional view of a heat exchange tube of a Stirling generator according to the present invention;

reference numerals are as follows:

100. a front end housing; 110. a piston cavity; 120. an outer housing; 130. an inner housing; 140. a heat exchange channel; 150. a flow channel; 111. an expansion zone; 112. a compression zone; 121. a first chamber; 122. a second chamber;

200. a heating assembly; 300. a heat regenerator; 400. a cooling assembly; 500. a heat exchange tube;

600. a piston device; 610. a gas distribution piston; 620. a power piston;

700. a rear end housing; 710. a buffer area;

800. a linear motor;

900. a spring assembly; 910. a valve piston plate spring; 920. a power piston leaf spring.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In addition, in the description of the embodiments of the present invention, unless otherwise specified, "a plurality" and "a plurality" mean two or more, and "a plurality", "several" and "several groups" mean one or more.

In the description of the present specification, references to the description of "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

As shown in fig. 1, fig. 2 and fig. 3, the embodiment of the present invention provides a stirling generator, including the stirling engine, the stirling engine includes a front end housing 100, a heating assembly 200, a heat regenerator 300 and a cooling assembly 400, the inside of the front end housing 100 is provided with a piston cavity 110, the heating assembly 200, the heat regenerator 300 and the cooling assembly 400 are sequentially disposed outside the piston cavity 110 along the axial direction of the piston cavity 110, at least one of the heating assembly 200 and the cooling assembly 400 includes a heat exchange tube 500, a plurality of heat exchange tubes 500 are arranged around the piston cavity 110, and each heat exchange tube 500 extends along the axial direction of the piston cavity 110, the piston cavity 110 is communicated with the heat exchange tube 500, and the heating assembly 200, the heat regenerator 300 and the cooling assembly 400 are sequentially communicated.

The utility model discloses stirling generator, piston cavity 110 is constructed to the inside of front end casing 100, but piston device 600 reciprocating motion in piston cavity 110, form expansion region 111 and the compression region 112 of gas working medium in piston cavity 110, heating element 200, cooling element 400 and regenerator 300 set up inside front end casing 100, and heating element 200 corresponds the setting in the expansion region 111 outside, cooling element 400 corresponds the setting in the compression region 112 outside, set up regenerator 300 between heating element 200 and the cooling element 400.

First, the power piston 620 moves from the bottom dead center toward the expansion region 111 simultaneously with the displacer 610, so that the gas is compressed in the compression region 112 and releases heat to the outside through the cooling module 400.

The power piston 620 continues to move toward the expansion region 111 and the displacer 610 moves toward the buffer region 710, and gas flows through the regenerator 300 from the compression region 112 into the expansion region 111, releases heat to the regenerator 300 when flowing through the regenerator 300, and absorbs heat when flowing through the heater assembly 200.

The heat of the gas absorption heating assembly 200 expands in the expansion region 111 causing the displacer 610 to continue moving toward the buffer region 710 and to push the power piston 620 toward the buffer region 710.

Finally, the power piston 620 continues to move towards the buffer area 710, the gas distribution piston 610 moves towards the expansion area 111, the gas flows through the heat regenerator 300 from the expansion area 111 and enters the compression area 112, heat is released to the heat regenerator 300 on the way, the cooled gas working medium enters the cooling assembly 400, and the gas enters the compression area 112 after further temperature reduction.

After the above-mentioned cycle is completed, the heat energy is converted into mechanical energy, and the power piston 620 drives the mover of the linear motor 800 to cut the magnetic induction lines, and outputs electric energy to the outside. The power piston 620 oscillates in simple harmonic with the displacer 610 and the phase of the displacer 610 leads the power piston 620.

The utility model discloses an at least one among heating element 200 and cooling element 400 includes heat exchange tube 500, a plurality of heat exchange tube 500 axial extensions, and closely arrange to encircle and set up in the outside of piston chamber 110, encircle to arrange into the great integral type heat exchanger of a whole replacement diameter of an annular promptly through using the less heat exchange tube 500 of a plurality of diameter to make through using the less heat exchange tube 500 of a plurality of diameter the utility model discloses a heat transfer structure and the heat transfer area of gaseous working medium compare in the heat exchanger of integral type promote by a wide margin, and cold and hot end heat transfer ability is stronger. This structure helps reducing the diameter of front end casing 100, reduces the thermal stress of front end casing 100, and the condition of thermal stress concentration is alleviated, when guaranteeing the generator performance, can effectively improve the problem of front end casing 100 stress concentration in the generator structure, strengthens the life-span of generator front end casing 100 material, and then promotes the construction of high-power space power.

In this embodiment, the heat regenerator 300, the heating assembly 200 and the cooling assembly 400 are coaxially disposed, and the heat regenerator 300 is filled with a circular metal filler, which can periodically absorb and release heat of the gas working medium along with the reciprocating motion of the piston assembly 600.

According to the utility model provides an embodiment, heat exchange tube 500 is slit heat exchanger. In this embodiment, only the heating module 200 may include a slit heat exchanger, only the cooling module 400 may include a slit heat exchanger, and both the heating module 200 and the cooling module 400 may include a slit heat exchanger. The slit type heat exchanger adopts oxygen-free copper with high heat conductivity as a material, gas and the heat exchange tube 500 are in full contact for heat exchange, the slit type heat exchanger can be designed according to heat exchange requirements, and the heat exchange area can be met.

The heating assembly 200 is composed of a plurality of small-diameter slit type heat exchangers, and is installed outside the piston chamber 110 in the front end housing 100, and the gas working medium in the expansion region 111 of the piston chamber 110 enters the regenerator 300 through the slit type heat exchangers. The cooler is composed of a plurality of small-diameter slit-type heat exchangers, and is installed outside the piston chamber 110 in the front-end housing 100, and the gas working medium in the regenerator 300 flows through the slit-type heat exchangers and enters the compression area 112.

In this embodiment, adopt slit type heat exchanger structure can furthest's increase gas working medium's heat transfer area, further improve cold and hot end heat exchange efficiency. In other embodiments, other types of heat exchange tubes 500 may be used to ensure that the effective heat exchange area and the material thermal stress meet the requirements.

According to the utility model provides an embodiment, front end casing 100 includes shell body 120 and interior casing 130, and the outside of interior casing 130 is located to shell body 120 cover, and piston chamber 110 is enclosed out to the inside of interior casing 130, encloses out heat transfer passageway 140 between interior casing 130 and the front end casing 100, and the both ends of piston chamber 110 communicate with heat transfer passageway 140's both ends respectively, and heating element 200, regenerator 300 and cooling element 400 set up in heat transfer passageway 140. In this embodiment, the inner casing 130 is disposed inside the outer casing 120 and is disposed coaxially with the outer casing 120, the inner casing 130 is configured as the piston chamber 110, a space between the inner casing 130 and the outer casing 120 forms the annular heat exchange channel 140, the heating assembly 200, the heat regenerator 300, and the cooling assembly 400 are sequentially disposed in the heat exchange channel 140 along a direction from the expansion area 111 to the compression area 112, the expansion area 111 and the compression area 112 of the piston chamber 110 are respectively communicated with two ends of the heat exchange channel 140, and a gas working medium can flow in the heat exchange channel 140.

According to the utility model provides an embodiment, heating element 200 still includes the heat source, and under heating element 200 included the condition of heat exchange tube 500, the heat exchange tube 500 outside was located to the heat source cover. In this embodiment, the gas working medium in the expansion region 111 enters the heat exchange tube 500, the heat source is sleeved outside the heat exchange tube 500, the gas working medium absorbs heat of the heat source in the heat exchange tube 500, the heat source is arranged outside the plurality of heat exchange tubes 500 which are arranged in a surrounding manner and have a smaller diameter, and the heat can be effectively transferred to the heat exchange tube 500, so that the heat exchange capability of the heat exchange tube 500 is enhanced.

According to the present invention, the heat source is a fluid heat source, the outer shell 120 is provided with a first chamber 121 at a position corresponding to the heat exchanging pipe 500, and the fluid heat source is disposed in the first chamber 121. In this embodiment, the outer shell 120 forms an annular first chamber 121 at a position corresponding to the heat exchange tube 500 of the heating assembly 200, and a high-temperature fluid heat source flows in the first chamber 121, that is, the fluid heat source flows on the outer wall surface of the outer shell 120 and fully contacts with the heat exchange tube 500, so as to transfer heat to a gas working medium in the heat exchange tube 500 for heat exchange, and the heat of the heat source can be effectively transferred to the heat exchange tube 500, thereby enhancing the heat exchange capability of the heat exchange tube 500.

In this embodiment, the fluid heat source may be a liquid metal. In other embodiments, the heat source may also employ a sodium potassium fluid or the like.

According to the utility model provides an embodiment, cooling module 400 still includes the cold source, and under cooling module 400 included heat exchange tube 500's the condition, the heat exchange tube 500 outside was located to the cold source cover. In this embodiment, the gas working medium in the heat regenerator 300 enters the heat exchange tube 500, the cold source is sleeved outside the heat exchange tube 500, and after the gas working medium in the heat regenerator 300 releases heat, the gas working medium enters the heat exchange tube 500 to absorb cold of the cold source, that is, the gas working medium further releases heat, and the cold source absorbs heat. The cold source sets up in the less a plurality of heat exchange tubes 500 outsides that encircle the range of diameter, and cold energy can effectively be transmitted to heat exchange tube 500 on, has strengthened heat exchange tube 500's heat transfer ability.

According to the utility model provides an embodiment, the cold source is the fluid cold source, and shell body 120 is equipped with second chamber 122 in the position that corresponds heat exchange tube 500, and the fluid cold source sets up in second chamber 122. In this embodiment, the outer shell 120 forms the annular second chamber 122 at a position corresponding to the heat exchange tube 500 of the cooling module 400, the low-temperature fluid heat source flows in the second chamber 122, that is, the fluid cold source flows on the outer wall surface of the outer shell 120 and fully contacts with the heat exchange tube 500, and transfers cold to the gas working medium in the heat exchange tube 500 for heat exchange, and the cold of the cold source can be effectively transferred to the heat exchange tube 500, thereby enhancing the heat exchange capability of the heat exchange tube 500.

In this embodiment, the fluid cooling source may be cooling water of a water chiller. In other embodiments, the cold source can also adopt liquid metal, liquid nitrogen and the like.

According to one embodiment of the present invention, the end of the outer casing 120 near the heating assembly 200 is a closed end, and the piston chamber 110 is communicated with the heat exchanging channel 140 through the flow channel 150 at the closed end. In this embodiment, one end of the outer casing 120 is a closed end, the other end is an open end, the inner casing 130 is inserted from the open end to the closed end, a gap is left between the end of the inner casing 130 and the closed end to form a flow channel 150, and the expansion region 111 is communicated with the heating element 200 in the heat exchange channel 140 through the flow channel 150.

According to the utility model provides an embodiment, stirling still includes rear end casing 700, piston device 600 and spring assembly 900, and piston device 600 sets up in piston chamber 110, and rear end casing 700 is connected with front end casing 100, and spring assembly 900 sets up in rear end casing 700, and piston device 600 is connected with spring assembly 900.

According to the utility model provides an embodiment, still include linear electric motor 800, linear electric motor 800 sets up in rear end casing 700, and is located between cooling module 400 and the spring unit 900.

The utility model discloses stirling generator for a reduce free piston stirling generator of front end casing 100 stress, through the structure that changes the heat exchanger, has reduced the diameter of pressure-bearing casing, effectively reduces the thermal stress that generator front end casing 100 received, and to a great extent solves the problem of high-power generator stress concentration. In addition, the heat exchange tube 500 adopts a certain number of narrow slit type heat exchangers with small diameters, so that the heat exchange area is greatly increased compared with the original structure, and the heat exchange capacity of the heating assembly 200 and the cooling assembly 400 of the high-power generator is improved. Meanwhile, in this structure, a high temperature fluid flows through the front end housing 100 on the outer side of the heating assembly 200 to exchange heat, a low temperature fluid flows through the front end housing 100 on the outer side of the cooling assembly 400 to exchange heat, and the heat exchange pipe 500 has a smaller diameter, so that the heat exchange is more sufficient. Therefore the utility model discloses a free piston stirling generator can not only effectively reduce the thermal stress of free piston stirling generator front end casing 100, has strengthened generator heat exchanger's heat transfer ability moreover.

The piston device 600 comprises an air distribution piston 610 and a power piston 620, the rear end device of the stirling generator comprises a rear end housing 700, and a linear motor 800, an air distribution piston plate spring 910 and a power piston plate spring 920 which are arranged in the rear end housing 700, the rear end housing 700 is connected with the open end of the front end housing 100, and the inner housing 130 extends into the rear end housing 700.

The displacer 610 is comprised of a displacer head and a displacer rod that is disposed through the power piston bore and secured to the displacer plate spring 910. The expansion region 111 is formed between the displacer 610 and the front end housing 100.

The power piston 620 and the air distribution piston 610 are coaxially arranged in the inner annular wall, a compression area 112 is formed between the power piston 620 and the air distribution piston 610, a buffer area 710 is formed between the power piston 620 and the rear end shell 700, one end of the power piston 620 is fixed on a power piston plate spring 920 and is connected with a rotor of the linear motor 800, and the power piston 620 drives the linear motor 800 to generate power during movement.

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, those skilled in the art will understand 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 (10)

1. A stirling generator, comprising: including stirling, stirling includes front end casing, heating element, regenerator and cooling module, the inside of front end casing is equipped with the piston chamber, heating element the regenerator with the cooling module is followed the axial in piston chamber set gradually in the outside in piston chamber, heating element with at least one among the cooling module includes the heat exchange tube, many the heat exchange tube encircles the piston chamber is arranged and is set up, and every the heat exchange tube is followed the axial extension in piston chamber, the piston chamber with the heat exchange tube intercommunication, heating element the regenerator with the cooling module communicates in proper order.

2. A stirling generator in accordance with claim 1, wherein: the heat exchange tube is a slit type heat exchanger.

3. A stirling generator according to claim 1, wherein: the front end casing includes shell body and interior casing, the shell body cover is located the outside of interior casing, the inside of interior casing is enclosed out the piston chamber, interior casing with enclose out the heat transfer passageway between the front end casing, the both ends in piston chamber respectively with the both ends intercommunication of heat transfer passageway, heating element the regenerator with cooling module set up in the heat transfer passageway.

4. A stirling generator in accordance with claim 3, wherein: the heating assembly further comprises a heat source, and the heat source is sleeved on the outer side of the heat exchange tube under the condition that the heating assembly comprises the heat exchange tube.

5. A Stirling generator according to claim 4, wherein: the heat source is a fluid heat source, a first cavity is arranged at the position, corresponding to the heat exchange tube, of the outer shell, and the fluid heat source is arranged in the first cavity.

6. A stirling generator according to claim 3, wherein: the cooling assembly further comprises a cold source, and the cold source is sleeved on the outer side of the heat exchange tube under the condition that the cooling assembly comprises the heat exchange tube.

7. A Stirling generator according to claim 6, wherein: the cold source is a fluid cold source, the outer shell is provided with a second cavity at a position corresponding to the heat exchange tube, and the fluid cold source is arranged in the second cavity.

8. A stirling generator in accordance with claim 3, wherein: the end, close to the heating assembly, of the outer shell is a closed end, and the piston cavity is formed in the closed end and communicated with the heat exchange channel through a flow channel.

9. A stirling generator in accordance with any one of claims 1 to 8, wherein: the Stirling engine further comprises a rear end shell, a piston device and a spring assembly, wherein the piston device is arranged in the piston cavity, the rear end shell is connected with the front end shell, the spring assembly is arranged in the rear end shell, and the piston device is connected with the spring assembly.

10. A stirling generator in accordance with claim 9, wherein: still include linear electric motor, linear electric motor set up in the rear end casing, and be located cooling module with between the spring unit.

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