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

A Stirling Generator

technical field

The utility model relates to the technical field of a Stirling generator and provides a Stirling generator.

Background technique

The free-piston Stirling generator adopts the Stirling cycle, which uses the heater to absorb the heat from the external heat source and convert it into work, and releases the excess heat through the cooler. Heat exchange components such as heaters, regenerators, and coolers are axially installed in the front-end casing of the generator. One end of the front-end casing is at high temperature and the other end is at low temperature. The temperature difference between the heater and cooler will make the front-end casing Great thermal stress is generated, that is, the difference in the thermal expansion coefficient of the front shell and the heat exchanger material produces great thermal stress on the shell, and as the diameter of the generator increases and the diameter of the shell increases, the thermal stress The problem of concentration is more serious, and the materials currently on the market are difficult to meet the stress and life requirements. At the same time, the generator casing is filled with high-pressure gas working fluid, and high-frequency oscillating pressure waves are generated when the generator is running, which increases the stress on the front-end casing of the generator. The stress problem greatly limits the development of free-piston Stirling generators to high power, and affects the construction of space high-power Stirling power stations. Therefore, it is necessary to appropriately improve the generator structure to reduce stress.

At present, there are several ways to reduce the stress: 1) reduce the gas pressure; 2) increase the thickness of the shell; 3) reduce the temperature of the hot end. It can be seen from the simulation that the thermal stress is the main factor in the stress of the front shell, and reducing the gas pressure has little effect on reducing the stress of the front shell. Although increasing the thickness of the shell can reduce the stress of the front shell to a certain extent, the thickening of the shell greatly increases the heat loss and reduces the efficiency of the generator. At present, the free piston Stirling generator is developing towards the high temperature region, which means that the temperature of the hot end of the generator needs to be further increased. At the same time, reducing the temperature of the hot end of the generator will have a negative effect on the efficiency of the generator. In summary, the above methods are not feasible.

Utility model content

The utility model provides a Stirling generator, which is used to solve one of the technical problems existing in the prior art, realize the effect of reducing the thermal stress of the front-end shell under the premise of ensuring the performance of the generator, and effectively relieve the thermal stress concentration problem.

The utility model provides a Stirling generator, which includes a Stirling engine. The Stirling engine includes a front-end housing, a heating assembly, a regenerator and a cooling assembly. A piston cavity is arranged inside the front-end housing. , the heating assembly, the regenerator and the cooling assembly are sequentially arranged outside the piston chamber along the axial direction of the piston chamber, at least one of the heating assembly and the cooling assembly includes a heat exchange A plurality of heat exchange tubes are arranged around the piston cavity, and each heat exchange tube extends along the axial direction of the piston cavity, the piston cavity communicates with the heat exchange tube, and the heating The assembly, the regenerator and the cooling assembly are connected in sequence.

According to a Stirling generator provided by the utility model, the heat exchange tube is a slit heat exchanger.

According to a Stirling generator provided by the utility model, the front-end casing includes an outer casing and an inner casing, the outer casing is sleeved on the outer side of the inner casing, and the inner casing of the inner casing The piston chamber is provided, a heat exchange passage is formed between the inner housing and the front end housing, the two ends of the piston chamber communicate with the two ends of the heat exchange passage respectively, and the heating assembly , the regenerator and the cooling assembly are arranged in the heat exchange channel.

According to a Stirling generator provided by the present invention, the heating assembly further includes a heat source, and when the heating assembly includes the heat exchange tube, the heat source is sheathed outside the heat exchange tube.

According to a Stirling generator provided by the utility model, the heat source is a fluid heat source, the outer shell is provided with a first chamber at a position corresponding to the heat exchange tube, and the fluid heat source is arranged in the second inside a chamber.

According to a Stirling generator provided by the present invention, the cooling assembly further includes a cold source, and when the cooling assembly includes the heat exchange tube, the cold source is sheathed on the heat exchange tube outside.

According to a Stirling generator provided by the utility model, the cold source is a fluid cold source, and the outer casing is provided with a second chamber at a position corresponding to the heat exchange tube, and the fluid cold source is arranged at in the second chamber.

According to a Stirling generator provided by the present utility model, the end of the outer housing close to the heating assembly is a closed end, and the piston chamber communicates with the heat exchange channel through a flow channel at the closed end.

According to a Stirling generator provided by the utility model, the Stirling engine further includes a rear end housing, a piston device and a spring assembly, the piston device is arranged in the piston cavity, and the rear end housing The body is connected with the front end casing, the spring assembly is arranged in the rear end casing, and the piston device is connected with the spring assembly.

According to the Stirling generator provided by the utility model, it further includes a linear motor, and the linear motor is arranged in the rear end housing and is located between the cooling assembly and the spring assembly.

In the Stirling generator provided by the utility model, at least one of the heating assembly and the cooling assembly includes a heat exchange tube, and a plurality of heat exchange tubes extend axially and are closely arranged around the outside of the piston chamber, that is, by using several The smaller-diameter heat exchange tubes are arranged in a ring to replace a larger-diameter integrated heat exchanger, so that the heat exchange structure of the utility model and the heat exchange area of the gas working medium are compared with the integrated heat exchanger Significantly improved, the heat exchange capacity of the cold and hot ends is stronger. At the same time, this structure helps to reduce the diameter of the front-end casing, reduce the thermal stress of the front-end casing, and alleviate the concentration of thermal stress. While ensuring the performance of the generator, it can effectively improve the stress concentration of the front-end casing in the generator structure To solve the problem, enhance the life of the generator front shell material, and then promote the construction of high-power space power supply.

In addition to the technical problems solved by the utility model described above, the technical features of the technical solutions formed and the advantages brought by the technical features of these technical solutions, other technical features of the utility model and the advantages brought by these technical features The advantages will be further explained in conjunction with the accompanying drawings, or learned through the practice of the utility model.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is one of structural representations of the Stirling generator provided by the utility model;

Fig. 2 is the second structural representation of the Stirling generator provided by the utility model;

Fig. 3 is a cross-sectional schematic diagram of the heat exchange tube of the Stirling generator provided by the utility model;

Reference signs:

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

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

600, piston device; 610, gas distribution piston; 620, power piston;

700, the rear shell; 710, the buffer zone;

800. Linear motor;

900, spring assembly; 910, gas distribution piston leaf spring; 920, power piston leaf spring.

detailed description

The implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the utility model, but cannot be used to limit the scope of the utility model.

In the description of the embodiments of the present utility model, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right" ", "vertical", "horizontal", "top", "bottom", "inner", "outer" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of description The embodiments and simplified descriptions of the present invention do not indicate or imply that the devices or elements 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. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

In the description of the embodiments of the present utility model, it should be noted that unless otherwise specified and limited, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrated connection; it can be mechanical connection or electrical connection; it can be direct connection or indirect connection through an intermediary. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present invention in specific situations.

In the embodiments of the present utility model, unless otherwise specified and limited, the first feature may be in direct contact with the first feature or the first feature and the second feature may pass through Intermediary indirect contact. Moreover, "above", "above" and "above" the first feature on the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. "Below", "beneath" and "beneath" the first feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is less horizontally than the second feature.

In addition, in the description of the embodiments of the present utility model, unless otherwise specified, the meanings of "multiple", "multiple roots" and "multiple groups" are two or more, "several", "several roots" , "several groups" means one or more than one.

In the description of this specification, descriptions referring to the terms "one embodiment", "some embodiments", "example", "specific examples", or "some examples" mean that specific features described in connection with the embodiment or example , structures, materials or features are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the described specific features, structures, materials or characteristics may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without conflicting with each other.

As shown in Fig. 1, Fig. 2 and Fig. 3, the Stirling generator provided by the embodiment of the utility model includes a Stirling engine, and the Stirling engine includes a front end housing 100, a heating assembly 200, a regenerator 300 and Cooling assembly 400, the inside of the front end housing 100 is provided with a piston chamber 110, the heating assembly 200, the regenerator 300 and the cooling assembly 400 are sequentially arranged outside the piston chamber 110 along the axial direction of the piston chamber 110, the heating assembly 200 and the cooling assembly At least one of the 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, and the piston cavity 110 communicates with the heat exchange tube 500, The heating assembly 200, the regenerator 300 and the cooling assembly 400 communicate in sequence.

In the Stirling generator according to the embodiment of the utility model, a piston chamber 110 is constructed inside the front end housing 100, and the piston device 600 can move back and forth in the piston chamber 110, forming an expansion zone 111 and In the compression zone 112, the heating component 200, the cooling component 400 and the regenerator 300 are arranged inside the front end shell 100, and the heating component 200 is correspondingly arranged outside the expansion zone 111, and the cooling component 400 is correspondingly arranged outside the compression zone 112, and the heating component 200 A regenerator 300 is provided between the cooling assembly 400 .

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

The power piston 620 continues to run towards the expansion zone 111, and the gas distribution piston 610 runs towards the buffer zone 710. The gas flows from the compression zone 112 through the regenerator 300 into the expansion zone 111, and releases heat to the regenerator 300 when it flows through the regenerator 300. The heater 300 absorbs heat when flowing through the heating element 200 .

The gas absorbs the heat of the heating assembly 200 and expands in the expansion zone 111 , so that the distributing piston 610 continues to move toward the buffer zone 710 , and pushes the power piston 620 to move toward the buffer zone 710 .

Finally, the power piston 620 continues to run toward the buffer zone 710, and the distributing piston 610 moves toward the expansion zone 111. The gas flows from the expansion zone 111 through the regenerator 300 into the compression zone 112, and releases heat to the regenerator 300 on the way. The cooled gas working fluid enters the cooling assembly 400 , and the gas temperature further decreases and then enters the compression zone 112 .

After completing the above cycle, the heat energy is converted into mechanical energy, and the mover of the linear motor 800 is driven by the power piston 620 to cut the magnetic induction line and output electric energy outward. The power piston 620 and the gas distribution piston 610 perform simple harmonic vibration, and the phase of the gas distribution piston 610 is ahead of the power piston 620 .

At least one of the heating assembly 200 and the cooling assembly 400 of the present invention includes a heat exchange tube 500, and a plurality of heat exchange tubes 500 extend axially and are closely arranged around the outside of the piston chamber 110, that is, by using several The small heat exchange tubes 500 are arranged in a ring to replace an integrated heat exchanger with a larger diameter, so that the heat exchange structure of the utility model and the heat exchange area of the gas working medium are significantly larger than those of the integrated heat exchanger. Enhanced, the heat exchange capacity of the hot and cold ends is stronger. This structure helps to reduce the diameter of the front-end casing 100, reduce the thermal stress of the front-end casing 100, and relieve the concentration of thermal stress. While ensuring the performance of the generator, it can effectively improve the front-end casing 100 in the generator structure. The problem of stress concentration can enhance the life of the material of the generator front-end casing 100, thereby promoting the construction of high-power space power supply.

In this embodiment, the regenerator 300 is arranged coaxially with the heating assembly 200 and the cooling assembly 400, and the interior of the regenerator 300 is filled with circular metal fillers, which can periodically absorb and release as the piston device 600 reciprocates. The effect of gas working medium heat.

According to an embodiment provided by the present utility model, the heat exchange tube 500 is a slit heat exchanger. In this embodiment, only the heating assembly 200 may include the slit heat exchanger, or only the cooling assembly 400 may include the slit heat exchanger, or both the heating assembly 200 and the cooling assembly 400 may include the slit heat exchanger. The slit heat exchanger uses oxygen-free copper with high thermal conductivity as the material, and the gas is in full contact with the heat exchange tube 500 to exchange heat. The slit heat exchanger can be designed according to the heat exchange requirements, and the heat exchange area can be satisfied.

The heating assembly 200 is composed of a plurality of small-diameter slit heat exchangers, installed outside the piston chamber 110 in the front end housing 100, and the gas working medium in the expansion zone 111 of the piston chamber 110 enters the back through the slit heat exchangers. Heater 300. The cooler consists of multiple small-diameter slit heat exchangers, which are 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 heat exchangers and enters the compression zone 112 .

In this embodiment, the adoption of the slit heat exchanger structure can maximize the heat exchange area of the gas working medium and further improve the heat exchange efficiency of the hot and cold ends. In other embodiments, other structural types of heat exchange tubes 500 can also be used, as long as the effective heat exchange area and thermal stress of the material meet the requirements.

According to an embodiment provided by the present invention, the front end housing 100 includes an outer housing 120 and an inner housing 130, the outer housing 120 is sleeved on the outside of the inner housing 130, and the inner housing 130 encloses a piston chamber 110, A heat exchange passage 140 is formed between the inner housing 130 and the front end housing 100, and the two ends of the piston cavity 110 communicate with the two ends of the heat exchange passage 140 respectively. The heating assembly 200, the regenerator 300 and the cooling assembly 400 are arranged Inside the heat exchange channel 140. In this embodiment, the inner housing 130 is arranged inside the outer housing 120 and is arranged coaxially with the outer housing 120. The interior of the inner housing 130 is configured as a piston chamber 110, and the space between the inner housing 130 and the outer housing 120 forms an annular shape. The heat exchange passage 140, the heating assembly 200, the regenerator 300 and the cooling assembly 400 are sequentially arranged in the heat exchange passage 140 along the direction from the expansion area 111 to the compression area 112, and the expansion area 111 and the compression area 112 of the piston chamber 110 are respectively connected to the Both ends of the heat channel 140 are connected, and gas working fluid can flow in the heat exchange channel 140 .

According to an embodiment of the present invention, the heating assembly 200 further includes a heat source, and when the heating assembly 200 includes the heat exchange tube 500 , the heat source is sheathed outside the heat exchange tube 500 . In this embodiment, the gas working medium in the expansion zone 111 enters the heat exchange tube 500, and a heat source is set outside the heat exchange tube 500. The gas working medium absorbs the heat of the heat source in the heat exchange tube 500, and the heat source is arranged in a circle with a smaller diameter. Outside the multiple heat exchange tubes 500, the heat can be effectively transferred to the heat exchange tubes 500, which enhances the heat exchange capacity of the heat exchange tubes 500.

According to an embodiment of 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 exchange tube 500 , and the fluid heat source is disposed in the first chamber 121 . In this embodiment, the outer casing 120 forms an annular first chamber 121 at the position corresponding to the heat exchange tube 500 of the heating assembly 200 , and the high-temperature fluid heat source flows in the first chamber 121 , that is, the fluid heat source flows in the outer casing 120 The outer wall surface of the heat exchange tube 500 is in full contact with the heat exchange tube 500, and the heat is transferred to the gas working medium in the heat exchange tube 500 for heat exchange. heat capacity.

In this embodiment, the fluid heat source can be liquid metal. In other embodiments, the heat source can also use sodium potassium fluid and the like.

According to an embodiment provided by the present invention, the cooling assembly 400 further includes a cooling source. When the cooling assembly 400 includes the heat exchange tube 500 , the cooling source is sleeved on the outside of the heat exchange tube 500 . In this embodiment, the gas working medium in the regenerator 300 enters the heat exchange tube 500, and a cold source is set outside the heat exchange tube 500. After the gas working medium in the regenerator 300 releases heat, it enters the heat exchange tube 500 to absorb The cooling capacity of the cold source, that is, the gas working medium further releases heat, and the cold source absorbs heat. The cold source is arranged outside the plurality of heat exchange tubes 500 arranged in a circle with a smaller diameter, and the cold energy can be effectively transferred to the heat exchange tubes 500 , thereby enhancing the heat exchange capacity of the heat exchange tubes 500 .

According to an embodiment provided by the present invention, the cooling source is a fluid cooling source, the outer casing 120 is provided with a second chamber 122 at a position corresponding to the heat exchange tube 500 , and the fluid cooling source is disposed in the second chamber 122 . In this embodiment, the outer shell 120 forms an annular second chamber 122 at the position corresponding to the heat exchange tube 500 of the cooling assembly 400, and the low-temperature fluid heat source flows in the second chamber 122, that is, the fluid cold source is in the outer shell The outer wall surface of 120 flows and fully contacts with the heat exchange tube 500, and transfers cold energy to the gas working medium in the heat exchange tube 500 for heat exchange. The cold energy of the cold source can be effectively transferred to the heat exchange tube 500, which enhances the heat exchange The heat transfer capacity of the tube 500.

In this embodiment, the fluid cooling source may be the cooling water of the water cooling unit. In other embodiments, liquid metal, liquid nitrogen, etc. can also be used as the cold source.

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

According to an embodiment provided by the utility model, the Stirling engine further includes a rear housing 700, a piston device 600 and a spring assembly 900, the piston device 600 is arranged in the piston cavity 110, the rear housing 700 and the front housing 100 To connect, the spring assembly 900 is disposed in the rear housing 700 , and the piston device 600 is connected to the spring assembly 900 .

According to an embodiment provided by the present invention, a linear motor 800 is further included, and the linear motor 800 is disposed in the rear housing 700 and is located between the cooling assembly 400 and the spring assembly 900 .

The Stirling generator of the embodiment of the utility model is a free-piston Stirling generator that reduces the stress of the front shell 100. By changing the structure of the heat exchanger, the diameter of the pressure-bearing shell is reduced, which effectively reduces the power generation. The thermal stress suffered by the front end casing 100 largely solves the problem of stress concentration of the high-power generator. In addition, the heat exchange tube 500 uses a certain number of small-diameter slit heat exchangers, 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 increased. At the same time, in this structure, the high-temperature fluid flows through the outer front-end casing 100 of the heating assembly 200 to exchange heat, and the low-temperature fluid flows through the outer front-end casing 100 of the cooling assembly 400 to exchange heat, and the diameter of the heat-exchange tube 500 is small, and the heat-exchange more fully. Therefore, the free-piston Stirling generator of the present utility model can not only effectively reduce the thermal stress of the front-end casing 100 of the free-piston Stirling generator, but also enhance the heat exchange capacity of the generator heat exchanger.

The piston device 600 includes a gas distribution piston 610 and a power piston 620, and the rear end device of the Stirling generator includes a rear end housing 700 and a linear motor 800 arranged in the rear end housing 700, a gas distribution piston plate spring 910 and a power piston plate The spring 920 connects the rear shell 700 to the open end of the front shell 100 , and the inner shell 130 extends into the rear shell 700 .

The gas distribution piston 610 is composed of a gas distribution piston head and a gas distribution piston rod. The gas distribution piston rod is arranged through the power piston hole and fixed on the gas distribution piston plate spring 910 . An expansion zone 111 is formed between the gas distribution piston 610 and the front end housing 100 .

The power piston 620 and the gas distribution piston 610 are coaxially arranged in the inner ring wall, forming a compression zone 112 with the gas distribution piston 610, and forming a buffer zone 710 with the rear end housing 700, and one end of the power piston 620 is fixed on the power piston The leaf spring 920 is connected with the mover of the linear motor 800 , and drives the linear motor 800 to generate electricity when moving.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (10)

1. A kind of Stirling generator, it is characterized in that: comprise Stirling engine, described Stirling engine comprises front-end housing, heating assembly, regenerator and cooling assembly, the inside of described front-end housing is provided with The piston chamber, the heating assembly, the regenerator and the cooling assembly are sequentially arranged outside the piston chamber along the axial direction of the piston chamber, at least one of the heating assembly and the cooling assembly includes heat exchange tubes, a plurality of heat exchange tubes are arranged around the piston cavity, and each of the heat exchange tubes extends along the axial direction of the piston cavity, and the piston cavity communicates with the heat exchange tubes, so The heating assembly, the regenerator and the cooling assembly are connected in sequence. 2. The Stirling generator according to claim 1, characterized in that: the heat exchange tube is a slit heat exchanger. 3. The Stirling generator according to claim 1, characterized in that: the front end casing comprises an outer casing and an inner casing, the outer casing is sleeved on the outer side of the inner casing, and the inner casing The inside of the housing encloses the piston chamber, and a heat exchange channel is encircled between the inner housing and the front end housing, and the two ends of the piston chamber communicate with the two ends of the heat exchange channel respectively , the heating assembly, the regenerator and the cooling assembly are arranged in the heat exchange channel. 4. The Stirling generator according to claim 3, characterized in that: the heating assembly further includes a heat source, and when the heating assembly includes the heat exchange tube, the heat source is sleeved on the outside of the heat exchange tube. 5. The Stirling generator according to claim 4, characterized in that: the heat source is a fluid heat source, the outer casing is provided with a first chamber at a position corresponding to the heat exchange tube, and the fluid heat source set in the first chamber. 6. The Stirling generator according to claim 3, characterized in that: the cooling assembly further includes a cold source, and when the cooling assembly includes the heat exchange tube, the cold source is sheathed on the outside of the heat exchange tube. 7. The Stirling generator according to claim 6, characterized in that: the heat sink is a fluid heat sink, and the outer casing is provided with a second chamber at a position corresponding to the heat exchange tube, the The fluid cooling source is arranged in the second chamber. 8. The Stirling generator according to claim 3, characterized in that: the end of the outer casing close to the heating assembly is a closed end, and the piston cavity is connected to the alternator through a flow channel at the closed end. Hot aisle connection. 9. The Stirling generator according to any one of claims 1 to 8, characterized in that: the Stirling engine further comprises a rear end housing, a piston device and a spring assembly, and the piston device is arranged on the In the piston chamber, the rear housing is connected to the front housing, the spring assembly is arranged in the rear housing, and the piston device is connected to the spring assembly. 10. The Stirling generator according to claim 9, further comprising a linear motor, the linear motor is arranged in the rear end housing and is located between the cooling assembly and the spring assembly .

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