A free piston Stirling generator with built-in phase modulation

Abstract

The present invention relates to the field of power machinery, and discloses a built-in phase-adjusting free piston Stirling generator, comprising: a housing and a back pressure chamber, a compression chamber, an expansion chamber, a phase-adjusting component, a linear motor, and a temperature regulating component arranged in the housing; the phase-adjusting end of the phase-adjusting component is located in the back pressure chamber, the back pressure chamber is connected to the expansion chamber through the phase-adjusting component, and the expansion chamber is connected to the compression chamber through the temperature regulating component; the power piston of the linear motor is movably arranged in the compression chamber. The built-in phase-adjusting free piston Stirling generator provided by the present invention eliminates the piston that reciprocates in the expansion chamber, connects the expansion chamber with the back pressure chamber through the phase-adjusting component, and places the phase-adjusting end of the phase-adjusting component in the back pressure chamber, so that the phase-adjusting component can use the tiny pressure fluctuation of the back pressure chamber to assist in phase adjustment, reduces the moving parts, increases the reliability, and simplifies the overall structure of the device. At the same time, the built-in phase-adjusting component effectively improves the efficiency of the generator.

Description

Technical Field

[0001] The invention relates to the field of power machinery, in particular to a built-in phase-modulated free piston Stirling generator. Background Art

[0002] Energy and environmental issues have become the main problems restricting the development of countries around the world today. With the continuous development of society, traditional high-grade fossil fuels not only cannot meet human needs in terms of quantity, but also the environmental pollution problems caused by them are not in line with the new development concept of mankind. At present, countries around the world are actively exploring new alternative energy sources, such as solar energy and nuclear energy; on the other hand, they are also studying how to use existing low-grade energy sources, such as waste heat and ordinary fuels. However, it is necessary to convert various energy sources into the form of electricity so that humans can use them more conveniently and effectively. Therefore, one of the effective ways to actively solve the above problems is to develop a power mechanical device that can efficiently convert various new alternative energy sources and low-grade energy into electricity or electricity.

[0003] The built-in phase-modulated free piston Stirling generator is a highly efficient external combustion thermoelectric conversion machine that can utilize almost all existing heat sources. Existing conventional free piston Stirling generators generally contain two pistons, one of which reciprocates in a high temperature environment, reducing the reliability of the generator. There are also free piston Stirling generators with only one piston, but their efficiency is low and cannot be used in practice. Summary of the invention

[0004] In view of the above technical defects and application requirements, an embodiment of the present invention provides a built-in phase-modulated free-piston Stirling generator to improve the reliability of the generator and improve the efficiency of the generator.

[0005] To solve the above problems, the present invention provides a built-in phase-adjusting free piston Stirling generator, comprising: a housing and a back pressure chamber, a compression chamber, an expansion chamber, a phase-adjusting component, a linear motor, and a temperature adjustment component arranged in the housing;

[0006] The phase-adjusting end of the phase-adjusting component is located in the back-pressure chamber, the back-pressure chamber is connected to the expansion chamber through the phase-adjusting component, and the expansion chamber is connected to the compression chamber through the temperature regulating component; the power piston of the linear motor is movably arranged in the compression chamber.

[0007] Further, the temperature regulating assembly comprises: a temperature regulating connection pipe and a phase regulating mechanism connected to each other;

[0008] The phase-adjusting connecting pipe passes through the back-pressure chamber, the compression chamber and the expansion chamber in sequence; the phase-adjusting mechanism is located in the back-pressure chamber, the back-pressure chamber is connected with the expansion chamber through the phase-adjusting mechanism and the phase-adjusting connecting pipe in sequence, and the power piston is movably mounted on the phase-adjusting connecting pipe.

[0009] Furthermore, the phase adjustment mechanism is a combination of one or more of an inertia tube, a small hole or a piston.

[0010] Further, the temperature adjustment component includes: a cooler, a regenerator and a heater;

[0011] The compression chamber is communicated with the expansion chamber through the cooler, the regenerator and the heater in sequence.

[0012] Furthermore, the linear motor includes: a coil, an inner return iron, an outer return iron, a coil bracket and an elastic member; the two ends of the elastic member are respectively fixed to the outer return iron, the power piston abuts against the elastic member, the coil is wound at relative positions on both side edges of the coil bracket, and the inner return iron is arranged between the outer return iron and the coil.

[0013] Furthermore, the elastic member is a leaf spring.

[0014] Furthermore, the leaf spring comprises:

[0015] A support plate and a plurality of leaf spring cantilevers; each of the leaf spring cantilevers is mounted on the support plate, and each of the leaf spring cantilevers is spaced apart from each other and extends in a spiral along the circumference of the support plate.

[0016] Furthermore, a connection hole for the phase adjustment assembly is provided at the center of the support plate, and the starting end of each leaf spring cantilever is tangent to the connection hole.

[0017] Furthermore, the arm widths of the leaf spring cantilevers are equal.

[0018] The built-in phase-adjusting free-piston Stirling generator provided by the present invention eliminates the reciprocating piston in the expansion chamber, connects the expansion chamber with the back-pressure chamber through a phase-adjusting component, and places the phase-adjusting end of the phase-adjusting component in the back-pressure chamber, so that the phase-adjusting component can utilize the tiny pressure fluctuations in the back-pressure chamber to assist in phase adjustment, thereby reducing moving parts, increasing reliability, and simplifying the overall structure of the device. At the same time, the built-in phase-adjusting component effectively improves the efficiency of the generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in 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 A schematic structural diagram of a built-in phase-modulated free-piston Stirling generator provided in an embodiment of the present invention;

[0021] Explanation of the reference numerals: 1. Shell; 2. Back pressure chamber; 3. Elastic member; 4. Coil; 5. Inner return iron; 6. Power piston; 7. Outer return iron; 8. Compression chamber; 9. Cooler; 10. Regenerator; 11. Heater; 12. Expansion chamber; 13. Connecting pipe; 14. Phase adjustment mechanism. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments 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] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The embodiment of the present invention provides a built-in phase-modulated free piston Stirling generator, such as Figure 1 As shown, the built-in phase-modulating free-piston Stirling generator includes: a shell 1 and a back-pressure chamber 2, a compression chamber 8, an expansion chamber 12, a phase-modulating component, a linear motor, and a temperature regulating component arranged in the shell 1; the phase-modulating end of the phase-modulating component is located in the back-pressure chamber 2, the back-pressure chamber 2 is connected to the expansion chamber 12 through the phase-modulating component, and the expansion chamber 12 is connected to the compression chamber 8 through the temperature regulating component; the power piston 6 of the linear motor is movably arranged in the compression chamber 8.

[0025] During the operation of the built-in phase-modulated free piston Stirling generator, the entire built-in phase-modulated free piston Stirling generator forms a cavity that is completely closed to the outside world through the shell 1, and the interior is filled with high-pressure helium. When the temperature adjustment component of the generator is heated externally, the gas expands due to the heat, and the pressure of the expansion chamber 12 increases, thereby pushing the power piston 6 to move. Due to the movement of the power piston 6, the volume of the compression chamber 8 increases, and at the same time, the gas moves to the temperature adjustment component and is cooled by it, the pressure of the expansion chamber 12 decreases, and the power piston 6 moves in the opposite direction, pushing the gas to the temperature adjustment component to be heated, and this cycle repeats itself. The movement of the power piston 6 drives the coil of the linear motor to cut the magnetic flux lines and output electricity to the outside. The whole process is that the built-in phase-modulated free piston Stirling generator continuously converts external thermal energy into electrical energy.

[0026] The built-in phase-adjusting free-piston Stirling generator provided in the embodiment of the present invention eliminates the reciprocating piston in the expansion chamber, connects the expansion chamber with the back-pressure chamber through a phase-adjusting component, and places the phase-adjusting end of the phase-adjusting component in the back-pressure chamber, so that the phase-adjusting component can utilize the tiny pressure fluctuations in the back-pressure chamber to assist in phase adjustment, thereby reducing the moving parts, increasing the reliability, and simplifying the overall structure of the device. At the same time, the built-in phase-adjusting component effectively improves the efficiency of the generator.

[0027] Based on the above embodiments, in a preferred embodiment, Figure 1 As shown, the temperature regulating assembly includes: a temperature regulating connecting pipe 13 and a phase regulating mechanism 14 which are interconnected.

[0028] Among them, the phase-adjusting connecting pipe 13 passes through the back-pressure chamber 2, the compression chamber 8 and the expansion chamber 12 in sequence; the phase-adjusting mechanism 14 is located in the back-pressure chamber 2, and the back-pressure chamber 2 is connected to the expansion chamber 12 through the phase-adjusting mechanism 14 and the phase-adjusting connecting pipe 13 in sequence, and the power piston 6 is movably mounted on the phase-adjusting connecting pipe 13. The phase-adjusting mechanism 14 is installed in the back-pressure chamber 2, so that the back-pressure chamber 2 can be used as a phase-adjusting gas reservoir. In addition, the phase-adjusting mechanism 14 can use the pressure fluctuation of the back-pressure chamber 2 to play an auxiliary phase-adjusting role. The gas in the back-pressure chamber 2 flows into the expansion chamber 12 through the phase-adjusting mechanism 14, and the phase of the pressure wave in the expansion chamber 12 will change after mixing. By changing the form of the phase-adjusting mechanism 14, the phase can be effectively adjusted to the optimal value, thereby improving the efficiency of the generator.

[0029] The phase adjustment mechanism 14 may be a combination of one or more of an inertia tube, a small hole or a piston.

[0030] In this embodiment, the temperature regulating component includes: a cooler 9, a regenerator 10 and a heater 11. The cooler 9 is used to cool the gas flowing through. The heater 11 is used to heat the gas flowing through. The regenerator 10 is arranged between the cooler 9 and the heater 11 to improve the heat exchange efficiency. The compression chamber 8 is connected to the expansion chamber 12 through the cooler 9, the regenerator 10 and the heater 11 in sequence. When the heater 11 of the generator is heated externally, the gas expands due to the heat, and the pressure of the expansion chamber 12 increases, thereby pushing the piston to move. Due to the movement of the power piston 6, the volume of the compression chamber 8 increases, and at the same time, the gas moves to the cooler 9 to be cooled and the temperature is reduced, the pressure of the expansion chamber 12 is reduced, and the power piston 6 moves in the opposite direction, pushing the gas to the heater 11 to be heated, and this cycle is repeated over and over again.

[0031] Among them, the linear motor includes: a coil 4, an inner return iron 5, an outer return iron 7, a coil bracket and an elastic member 3; the two ends of the elastic member 3 are respectively fixed to the outer return iron 7, the power piston 6 abuts against the elastic member 3, the coil 4 is wound at relative positions on both sides of the coil bracket, and the inner return iron 5 is arranged between the outer return iron 7 and the coil 4.

[0032] In some preferred embodiments, the elastic member 3 can be selected as a leaf spring. The leaf spring includes: a support plate and a plurality of leaf spring cantilevers; the arm widths of the leaf spring cantilevers are equal. The leaf spring cantilevers are mounted on the support plate, and the leaf spring cantilevers are spaced apart from each other and extend in a spiral along the circumference of the support plate. A connecting hole for the phase adjustment assembly is provided at the center of the support plate, and the starting ends of the leaf spring cantilevers are tangent to the connecting hole.

[0033] In summary, the built-in phase-adjusting free-piston Stirling generator provided in the embodiment of the present invention eliminates the reciprocating piston in the expansion chamber, connects the expansion chamber with the back-pressure chamber through a phase-adjusting component, and places the phase-adjusting end of the phase-adjusting component in the back-pressure chamber, so that the phase-adjusting component can utilize the tiny pressure fluctuations in the back-pressure chamber to assist in phase adjustment, thereby reducing the moving parts, increasing the reliability, and simplifying the overall structure of the device. At the same time, the built-in phase-adjusting component effectively improves the efficiency of the generator.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the invention rather than to limit it. Although the 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 invention.

Claims

1. A built-in phase-modulated free piston Stirling generator, characterized in that: include: A shell and a back pressure chamber, a compression chamber, an expansion chamber, a phase adjustment component, a linear motor, and a temperature adjustment component arranged in the shell; The phase-adjusting end of the phase-adjusting component is located in the back-pressure chamber, the back-pressure chamber is connected to the expansion chamber through the phase-adjusting component, and the expansion chamber is connected to the compression chamber through the temperature-adjusting component; the power piston of the linear motor is movably disposed in the compression chamber; The temperature adjustment component comprises: a temperature adjustment connection pipe and a phase adjustment mechanism connected to each other; The phase-adjusting connecting pipe sequentially passes through the back-pressure chamber, the compression chamber and the expansion chamber; the phase-adjusting mechanism is located in the back-pressure chamber, the back-pressure chamber is sequentially connected to the expansion chamber through the phase-adjusting mechanism and the phase-adjusting connecting pipe, and the power piston is movably mounted on the phase-adjusting connecting pipe; The linear motor comprises: Coil, inner return iron, outer return iron, coil support and elastic parts; The two ends of the elastic member are respectively fixed to the outer return iron, the power piston abuts against the elastic member, the coil is wound on the relative positions of the two sides of the coil support, and the inner return iron is arranged between the outer return iron and the coil.

2. The built-in phase-modulated free piston Stirling generator according to claim 1, characterized in that: The phase adjustment mechanism is a combination of one or more of an inertia tube, a small hole or a piston.

3. The built-in phase-modulated free piston Stirling generator according to claim 1, characterized in that: The temperature adjustment component includes: a cooler, a regenerator and a heater; The compression chamber is communicated with the expansion chamber through the cooler, the regenerator and the heater in sequence.

4. The built-in phase-modulated free piston Stirling generator according to claim 1, characterized in that: The elastic member is a leaf spring.

5. The built-in phase-modulated free-piston Stirling generator according to claim 4, characterized in that: The leaf spring comprises: A support plate and a plurality of leaf spring cantilevers; each of the leaf spring cantilevers is mounted on the support plate, and each of the leaf spring cantilevers is spaced apart from each other and extends in a spiral along the circumference of the support plate.

6. The built-in phase-modulated free-piston Stirling generator according to claim 5, characterized in that: A connecting hole of the phase adjustment component is provided at the center of the support plate, and the starting end of each leaf spring cantilever is tangent to the connecting hole.

7. The internal phase-modulated free piston Stirling generator according to claim 5, characterized in that: The arm widths of the leaf spring cantilevers are equal.

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