Electric coupling Stirling generator system with double opposed generators

Abstract

The invention relates to the technical field of engines, and provides an electric coupling double-engine opposed Stirling generator system which comprises a pair of Stirling generators and a load, the pair of Stirling generators comprises a first Stirling generator and a second Stirling generator which are oppositely arranged, and the first Stirling generator and the second Stirling generator are the same in structure; the first end of the load is electrically connected with the negative terminal of the first Stirling generator and the negative terminal of the second Stirling generator through wires, and the second end of the load is electrically connected with the positive terminal of the first Stirling generator and the positive terminal of the second Stirling generator through wires; cooperative operation of the two generators can be achieved through electric connection, the structure of the system is simplified, and the vibration level of the whole system is remarkably reduced; and the two Stirling generators are connected in parallel to realize cooperative operation and are mutually independent, so that the overall reliability of the system is ensured, and the fault-tolerant capability of the system is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to an electrically coupled dual-machine opposed Stirling generator system. Background Art

[0002] The free piston Stirling generator is a heat-to-work conversion heat engine based on the Stirling cycle, which contains two high-frequency reciprocating pistons. When the generator is running, the power piston drives the linear motor to move, which will give a reciprocating force to the coil fixed to the generator casing. At the same time, the movement of the valve piston will be transmitted to the generator casing through the leaf spring connected to it. When the two pistons move, the piston mass and stroke are inconsistent, resulting in different sizes of the reciprocating forces acting on the casing, and there is also a certain phase difference in the movement of the two pistons, so the vibration of the casing is difficult to offset. Therefore, vibration is an inherent property of the free piston Stirling generator.

[0003] The most commonly used and effective solution to the vibration problem of free-piston Stirling generators is to use two opposing machines to form a free-piston Stirling generator unit. Theoretically, as long as two identical Stirling generators are opposed and the piston systems of the two generators operate in opposite directions, the vibrations of the two generators can be completely offset, thereby achieving a vibration-free system. The two opposing Stirling generators have exactly the same operating frequency and opposite piston vibration directions, and the vibrations of the two generators are offset. This state is defined as the two generators being in a coordinated operation state. In order to achieve the coordinated operation of two opposing Stirling generators, existing conventional technical solutions usually include the following.

[0004] The first is that the two Stirling generators are completely independent inside and are only connected by mechanical opposition, which is called "force coupling". The basic principle is to directly use mechanical fixing to place the two generators opposite each other, so that the vibrations of the two generators are transmitted to each other, affect each other, and adjust and adapt to each other, which will eventually make the piston vibration frequency of the two generators the same and the vibration direction opposite, so that the system vibrations cancel each other out. The advantage of this solution is that the generators are independent of each other and the structure is simple. And when one of them has problems such as air leakage, piston jamming, performance change, etc., the other can still work. The disadvantage is that only through mechanical connection, in order to achieve mutual transmission of vibration, the two generators and the fixed platform must be elastically connected and have certain requirements for the elasticity. If the elasticity is small or even rigidly connected, the vibrations of the two generators cannot be transmitted, adjusted, and adapted to each other, and the two generators cannot achieve coordinated operation to achieve the purpose of vibration reduction. In addition, in theory, the two generators need to be completely consistent. In fact, due to processing, assembly and other reasons, there will be certain differences between the two generators. The greater the difference, the more difficult it is for the two generators to cooperate.

[0005] The second is that two Stirling generators are mechanically connected while sharing an expansion chamber or a compression chamber. This is called "gas coupling". The basic principle is to use external pipes and other devices to connect the working chambers of the two generators. When the gases inside the two generators are the same, the pressure waves inside that drive the pistons will be exactly the same, which will make the two opposing generators operate in the same condition, but in opposite phases, just to offset the vibration. The advantage of this solution is that it is easier to achieve the coordinated operation of the two generators, and the environmental requirements for the installation of the generators are lower. The disadvantage is that when one of the two generators has problems such as air leakage, piston jamming, performance changes, etc., when the expansion chamber or the compression chamber is shared, the other generator cannot operate normally, which greatly reduces the reliability of the system. At the same time, the external connection pipelines also increase the complexity of the system.

[0006] In short, the existing technical solutions have shortcomings and cannot meet the requirements of space energy systems for Stirling generators such as long life, high reliability, and low vibration. Summary of the invention

[0007] The present invention provides an electrically coupled dual-machine opposed Stirling generator system, which is used to solve the problem that the prior art cannot meet the low vibration requirement of the Stirling generator. Through electrical coupling, the technical effect of coordinated operation can be more easily achieved.

[0008] The present invention provides an electrically coupled dual-machine opposed Stirling generator system, comprising: A pair of Stirling generators, comprising a first Stirling generator and a second Stirling generator arranged opposite to each other, wherein the first Stirling generator and the second Stirling generator have the same structure; A load, wherein a first end of the load is electrically connected to the negative terminals of the first Stirling generator and the second Stirling generator through a wire, and a second end of the load is electrically connected to the positive terminals of the first Stirling generator and the second Stirling generator through a wire.

[0009] According to the electrically coupled dual-machine opposed Stirling generator system provided by the present invention, a first capacitor is provided on the wire between the second end of the load and the positive terminal of the first Stirling generator; A second capacitor is arranged on the conductive line between the second end of the load and the positive terminal of the second Stirling generator.

[0010] The electrically coupled dual-machine opposed Stirling generator system provided by the present invention further includes a fixed platform, and the first Stirling generator and the second Stirling generator are arranged on the fixed platform.

[0011] The electrically coupled dual-machine opposed Stirling generator system provided by the present invention further includes a support member, which is arranged on the fixed platform, and the first Stirling generator and the second Stirling generator are both connected to the support member.

[0012] According to the electrically coupled dual-machine opposed Stirling generator system provided by the present invention, the first Stirling generator comprises a first Stirling engine and a first linear generator, the first Stirling engine can drive the first linear generator to generate electricity, and the load and the first capacitor are electrically connected to the first linear generator; The second Stirling generator includes a second Stirling engine and a second linear generator. The second Stirling engine can drive the second linear generator to generate electricity. The load and the second capacitor are electrically connected to the second linear generator.

[0013] According to the electrically coupled dual-machine opposed Stirling generator system provided by the present invention, the first Stirling generator further comprises: Generator housing; A gas distribution piston is arranged in the generator housing, and an expansion chamber is formed between the gas distribution piston and the generator housing; A power piston is arranged in the generator housing, the power piston is connected to the mover of the first linear generator, a compression chamber is formed between the power piston and the valve piston, and a back pressure chamber is formed between the power piston and the generator housing.

[0014] The electrically coupled dual-machine opposed Stirling generator system provided in the present invention further includes an elastic member, which is arranged in the generator housing and located on the outer side of one end of the power piston away from the valve piston, and the elastic member is connected to the valve piston.

[0015] According to the electrically coupled dual-engine opposed Stirling generator system provided by the present invention, the first Stirling engine and the second Stirling engine both include a heater, a regenerator and a cooler arranged on the periphery of the valve piston, and the heater, the regenerator and the cooler are arranged in sequence along the direction from the expansion chamber to the compression chamber.

[0016] According to the electrically coupled dual-machine opposed Stirling generator system provided by the present invention, the heater, the regenerator and the cooler are cylindrical structures and are coaxially arranged with the valve piston.

[0017] According to the electrically coupled dual-machine opposed Stirling generator system provided by the present invention, the elastic member is a leaf spring.

[0018] The present invention provides an electrically coupled dual-machine opposed Stirling generator system, comprising a pair of Stirling generators and a load. Compared with the traditional "force coupling" or "gas coupling" scheme, this parallel connection method does not require complex mechanical connections or external pipelines to achieve vibration cancellation. The coordinated operation of the two generators can be achieved through electrical connection, which simplifies the structure of the system and reduces maintenance costs. The two Stirling generators are connected in parallel to achieve coordinated operation and are independent of each other. Even if one of the Stirling generators fails, the other Stirling generator can still continue to work, ensuring the overall reliability of the system and improving the fault tolerance of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a structural schematic diagram of an electrically coupled dual-machine opposed Stirling generator system provided in an embodiment of the present invention.

[0021] Reference numerals: 100, expansion chamber; 200, compression chamber; 300, back pressure chamber; 1. Load; 2. First capacitor; 3. Second capacitor; 4. Fixed platform; 5. Support member; 6. First Stirling engine; 7. First linear generator; 8. Second Stirling engine; 9. Second linear generator; 10. Generator housing; 11. Valve piston; 12. Power piston; 13. Elastic member; 14. Heater; 15. Regenerator; 16. Cooler. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Combine the following Figure 1 An electrically coupled dual-opposed Stirling generator system of the present invention is described.

[0024] An embodiment of the present invention provides an electrically coupled dual-machine opposed Stirling generator system, comprising: a pair of Stirling generators and a load 1. In this embodiment, the two opposed Stirling generators are independent of each other in structure, have completely the same operating frequency, and have opposite piston vibration directions, so that the vibrations of the two Stirling generators can be offset, and this state is defined as the two Stirling generators are in a coordinated operation state.

[0025] Specifically, a pair of Stirling generators includes a first Stirling generator and a second Stirling generator that are arranged opposite to each other, and the structures of the first Stirling generator and the second Stirling generator are the same; the first end of load 1 is electrically connected to the negative terminals of the first Stirling generator and the second Stirling generator through a wire, and the second end of load 1 is electrically connected to the positive terminals of the first Stirling generator and the second Stirling generator through a wire.

[0026] It can be seen from the above scheme that the present invention connects the output circuits of two Stirling generators directly in parallel to the same load 1. The current generated by any Stirling generator will flow through the circuit of the other Stirling generator. This bidirectional energy transfer promotes the electromagnetic coupling between the two Stirling generators, making it easier to achieve synchronous operation. Since the output voltages and currents of the two Stirling generators affect each other, the system can dynamically adjust the working state of each generator to maintain the stability of the total output power. The parallel-connected load 1 configuration allows the two Stirling generators to share the external load 1. If the output power of one of the Stirling generators changes, for example, due to temperature changes or mechanical wear, the other Stirling generator will automatically adjust its output to maintain the stability of the total output power. This adaptive load 1 distribution mechanism helps to maintain the stability of the system and ensure that the pistons of the two Stirling generators vibrate in opposite phases, that is, the vibration forces generated will offset each other in space, thereby achieving vibration offset and significantly reducing the vibration level of the entire system.

[0027] The present invention is different from the traditional "force coupling" or "gas coupling" scheme. This parallel connection method does not require complex mechanical connections or external pipelines to achieve vibration compensation. The coordinated operation of the two generators can be achieved through electrical connection, which simplifies the structure of the system and reduces maintenance costs. The two Stirling generators are connected in parallel to achieve coordinated operation and are independent of each other. Even if one of the Stirling generators fails, the other Stirling generator can still continue to work, ensuring the overall reliability of the system and improving the fault tolerance of the system.

[0028] Furthermore, a first capacitor 2 is provided on the wire between the second end of the load 1 and the positive terminal of the first Stirling generator; a second capacitor 3 is provided on the wire between the second end of the load 1 and the positive terminal of the second Stirling generator.

[0029] With this arrangement, by connecting a capacitor to the output circuit of each Stirling generator, the capacitor can compensate for the inductance effect caused by the generator winding. Capacitor compensation not only helps to improve the power factor, but also makes it easier for the system to reach a resonant state. In the resonant state, the generator can work more efficiently, reducing energy losses. The output voltage and current of the generator are more stable, further improving the efficiency of the system.

[0030] In some specific embodiments, a fixed platform 4 is further included, and the first Stirling generator and the second Stirling generator are arranged on the fixed platform 4; Figure 1 As shown, the fixed platform 4 provides a common mechanical foundation for the two Stirling generators, so that the vibrations between them can be transmitted and adjusted to each other through the platform, ensuring that they will not be displaced or shaken unnecessarily during operation. This helps to keep the relative positions of the two Stirling generators fixed, thereby ensuring that a pair of Stirling generators can vibrate in opposite phases to achieve effective vibration cancellation, which helps the two generators reach a synchronous operation state more quickly and further improves the vibration reduction effect.

[0031] With such an arrangement, by installing the two Stirling generators on the same fixed platform 4, the installation process can be greatly simplified, and the fixed platform 4 provides a centralized working space. This integrated design reduces the installation time and also makes the maintenance of the two generators more convenient. If one of the Stirling generators needs to be inspected or parts replaced, the technician can operate without disassembling the other Stirling generator. In addition, the relative position between the two Stirling generators can be precisely controlled through the fixed platform 4 to ensure that they are in an ideal opposing state, which helps to achieve the vibration of the pistons of the two Stirling generators in opposite phases, thereby maximizing the vibration offset.

[0032] At the same time, the design of the fixed platform 4 can also provide a good heat dissipation environment for the two Stirling generators. Through reasonable layout and ventilation design, for example, reasonable design of the material and structure of the fixed platform 4 and the installation of water cooling or air cooling devices, the heat generated during the operation of the generator can be effectively conducted and dissipated, ensuring that the Stirling generator can effectively dissipate heat during operation and avoid performance degradation or failure due to overheating.

[0033] Furthermore, it also includes a support member 5, which is arranged on the fixed platform 4, and the first Stirling generator and the second Stirling generator are both connected to the support member 5; for example, the support member 5 can be a support plate, and the design of the support plate should also consider its strength and rigidity to ensure that it can withstand various forces and vibrations generated by the generator during operation. By using high-strength materials and optimizing structural design, it can be ensured that the support plate has sufficient load-bearing capacity and stability, thereby ensuring the safe operation of the entire system.

[0034] With such arrangement, on the one hand, the support 5 can reduce the installation error. Through the precise positioning of the support 5, the center lines of the two Stirling generators can be ensured to be completely aligned, and they can be ensured to be in an ideal opposing state, which is crucial to improving the vibration reduction effect of the system and helps to achieve the vibration of the pistons of the two Stirling generators in completely opposite phases, thereby maximally canceling the vibration. On the other hand, the support 5 can adjust the vibration frequency. By selecting materials of the support 5 with different characteristics, such as rigidity and elasticity, the vibration frequency between the two Stirling generators can be adjusted to make them more matched, which helps to optimize the vibration reduction performance of the system, especially in high-frequency vibration environments.

[0035] In this embodiment, the first Stirling generator and the second Stirling generator are independent of each other and have the same structure; Figure 1 As shown, the first Stirling generator includes a first Stirling engine 6 and a first linear generator 7. The first Stirling engine 6 and the first linear generator 7 are both installed on a fixed platform 4 through a support 5. The first Stirling engine 6 can drive the first linear generator 7 to generate electricity. The load 1 and the first capacitor 2 are electrically connected to the first linear generator 7.

[0036] The second Stirling generator includes a second Stirling engine 8 and a second linear generator 9, and the second Stirling engine 8 and the second linear generator 9 are both installed on the fixed platform 4 through the support 5. The second Stirling engine 8 can drive the second linear generator 9 to generate electricity, and the load 1 and the second capacitor 3 are electrically connected to the second linear generator 9; wherein, the first Stirling engine 6 and the second Stirling engine 8 are both free piston Stirling engines, and the first Stirling engine 6, the first linear generator 7, the second Stirling engine 8 and the second linear generator 9 are coaxially arranged horizontally on the fixed platform 4 along a straight line.

[0037] In this embodiment, the first Stirling engine 6 and the second Stirling engine 8 both include a heater 14, a regenerator 15 and a cooler 16 arranged on the periphery of the valve piston 11. In the direction from the expansion chamber 100 to the compression chamber 200, the heater 14, the regenerator 15 and the cooler 16 are arranged in sequence.

[0038] Since a large amount of heat is generated during the movement of the gas distribution piston 11, by setting the cooler 16 on the periphery of the gas distribution piston 11, it can be ensured that the cooler 16 can directly contact the heat generated by the gas distribution piston 11, so as to quickly take it away and prevent the heat from accumulating inside the Stirling generator. The main function of the regenerator 15 is to recover and utilize the heat energy lost during the cooling process, thereby improving the thermal efficiency of the Stirling generator. During the operation of the Stirling generator, the cooler 16 will cool the gas distribution piston 11 and other key components, and a certain amount of heat energy loss will be generated in this process. By setting the regenerator 15, these lost heat energy can be recovered and reused to reduce energy waste. The main function of the heater 14 is to provide the necessary heat energy for the Stirling generator to drive the expansion and compression of the gas during the cycle. By providing an external heat source to the heater 14, the gas can be heated and expanded, thereby generating power to drive the gas distribution piston 11 to move. This movement is then converted into electrical energy through the linear motor to realize the power generation function of the Stirling generator.

[0039] It should be noted that the heater 14, the regenerator 15 and the cooler 16 are all products in the prior art. Their specific structures and principles are not the focus of this article and will not be described in detail here.

[0040] Optionally, the heater 14 , the regenerator 15 and the cooler 16 are cylindrical structures and are coaxially arranged with the gas distribution piston 11 to allow the gas distribution piston 11 to pass through.

[0041] In some specific embodiments, the first Stirling generator further includes a generator housing 10, a valve piston 11 and a power piston 12; wherein the first Stirling engine 6 and the first linear generator 7 are arranged in the generator housing 10, and the generator housing 10, as the main structure of the entire Stirling generator, not only supports and protects the internal components, but also ensures the sealing of the gas during internal circulation. The valve piston 11 is arranged in the generator housing 10, and a compression chamber 200 is formed between the valve piston 11 and the power piston 12, and an expansion chamber 100 is formed between the valve piston 11 and the generator housing 10; the power piston 12 is arranged in the generator housing 10, and the power piston 12 is connected to the mover of the first linear generator 7, and a back pressure chamber 300 is formed between the power piston 12 and the generator housing 10.

[0042] Among them, the main function of the gas distribution piston 11 is to move periodically to redistribute the working gas, such as helium or hydrogen, between the hot end and the cold end. Through this movement, the gas distribution piston 11 can control the flow of gas between different temperature areas, thereby realizing heat transfer and work output; the setting of the gas distribution piston 11 enables the Stirling generator to achieve orderly circulation of gas, ensuring that the gas flows along a predetermined path between the compression chamber 200, the expansion chamber 100 and the back pressure chamber 300.

[0043] The main function of the power piston 12 is to convert the pressure changes caused by the expansion and contraction of the gas into mechanical work. The compression chamber 200 is where the gas is compressed, and the expansion chamber 100 is where the gas expands and releases energy. The two chambers work together with the valve piston 11 and the power piston 12 to complete the gas compression, expansion and energy conversion process. When the power piston 12 reciprocates under the impetus of the gas, the power piston 12 drives the generator mover to move, so that the generator mover and the generator stator move relative to each other to generate electrical energy. For example, the generator stator can be a generator coil, and the generator mover can be a generator magnet, so that the first linear generator 7 converts this mechanical movement into electrical energy.

[0044] Furthermore, it also includes an elastic member 13, which is preferably a leaf spring. The elastic member 13 is arranged in the generator housing 10 and is located outside the end of the power piston 12 away from the gas distribution piston 11, and the elastic member 13 is connected to the gas distribution piston 11. In this way, the elastic member 13 can act as a buffer to absorb the impact force of the power piston 12 and the gas distribution piston 11 in the reciprocating motion, reduce the damage to the piston and related components caused by mechanical collision, which helps to extend the service life of the piston and other internal components; and the elastic member 13 can provide a constant reaction force during the movement of the gas distribution piston 11, help stabilize the stroke of the gas distribution piston 11, and ensure that its movement is more stable and precise; and the elastic member 13 can effectively reduce the vibration level inside the generator by absorbing and dispersing the vibration energy generated by the piston movement, especially in high-frequency reciprocating motion, the elastic member 13 can significantly reduce the vibration transmitted to the generator housing 10, thereby reducing the vibration output of the entire system.

[0045] By connecting the output ends of a pair of Stirling generators in parallel to the same load 1, the system can achieve the following significant effects: 1. Vibration cancellation: the pistons of the two Stirling generators vibrate in opposite phases, effectively reducing the vibration level of the system.

[0046] 2. Load 1 is balanced. The two generators share the external load 1 to ensure the stability and reliability of the system.

[0047] 3. Optimized design: Compared with traditional mechanical coupling or gas coupling solutions, this electrical connection method simplifies the system structure and reduces maintenance costs; even if one generator fails, the other generator can continue to work, improving the fault tolerance of the system.

[0048] 4. Integrating two Stirling generators on a fixed platform 4 forms a modular power generation unit, making the entire system easier to transport and deploy, and is particularly suitable for occasions that require rapid installation, such as field operations, emergency power supply, etc.

[0049] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0050] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "mode", "specific mode", or "some modes" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or mode are included in at least one embodiment or mode of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or mode. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or modes in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or modes described in this specification and the features of the different embodiments or modes, without contradiction.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electrically coupled dual-machine opposed Stirling generator system, characterized in that: include: A pair of Stirling generators, comprising a first Stirling generator and a second Stirling generator arranged opposite to each other, wherein the first Stirling generator and the second Stirling generator have the same structure; A load (1), wherein a first end of the load (1) is electrically connected to the negative terminal of the first Stirling generator and the second Stirling generator through a wire, and a second end of the load (1) is electrically connected to the positive terminal of the first Stirling generator and the second Stirling generator through a wire.

2. The electrically coupled dual-machine opposed Stirling generator system according to claim 1, characterized in that: A first capacitor (2) is provided on the conductive line between the second end of the load (1) and the positive terminal of the first Stirling generator; A second capacitor (3) is provided on the conductive line between the second end of the load (1) and the positive terminal of the second Stirling generator.

3. The electrically coupled dual-machine opposed Stirling generator system according to claim 1 or 2, characterized in that: It also comprises a fixed platform (4), on which the first Stirling generator and the second Stirling generator are arranged.

4. The electrically coupled dual-machine opposed Stirling generator system according to claim 3, characterized in that: It also comprises a support member (5), wherein the support member (5) is arranged on the fixed platform (4), and the first Stirling generator and the second Stirling generator are both connected to the support member (5).

5. The electrically coupled dual-machine opposed Stirling generator system according to claim 2, characterized in that: The first Stirling generator comprises a first Stirling engine (6) and a first linear generator (7); the first Stirling engine (6) is capable of driving the first linear generator (7) to generate electricity; the load (1) and the first capacitor (2) are electrically connected to the first linear generator (7); The second Stirling generator comprises a second Stirling engine (8) and a second linear generator (9); the second Stirling engine (8) is capable of driving the second linear generator (9) to generate electricity; the load (1) and the second capacitor (3) are electrically connected to the second linear generator (9).

6. The electrically coupled dual-machine opposed Stirling generator system according to claim 5, characterized in that: The first Stirling generator further comprises: Generator housing (10); A gas distribution piston (11) is arranged in the generator housing (10), and an expansion chamber (100) is formed between the gas distribution piston (11) and the generator housing (10); A power piston (12) is disposed in the generator housing (10); the power piston (12) is connected to a mover of the first linear generator (7); a compression chamber (200) is formed between the power piston (12) and the gas distribution piston (11); and a back pressure chamber (300) is formed between the power piston (12) and the generator housing (10).

7. The electrically coupled dual-machine opposed Stirling generator system according to claim 6, characterized in that: It also includes an elastic member (13), which is arranged in the generator housing (10) and located outside an end of the power piston (12) away from the gas distribution piston (11), and the elastic member (13) is connected to the gas distribution piston (11).

8. The electrically coupled dual-machine opposed Stirling generator system according to claim 6, characterized in that: The first Stirling engine (6) and the second Stirling engine (8) both include a heater (14), a regenerator (15) and a cooler (16) arranged on the periphery of the valve piston (11), and the heater (14), the regenerator (15) and the cooler (16) are arranged in sequence along the direction from the expansion chamber (100) to the compression chamber (200).

9. The electrically coupled dual-machine opposed Stirling generator system according to claim 8, characterized in that: The heater (14), the heat regenerator (15) and the cooler (16) are cylindrical structures and are coaxially arranged with the gas distribution piston (11).

10. The electrically coupled dual-machine opposed Stirling generator system according to claim 7, characterized in that: The elastic member (13) is a leaf spring.

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