CN215213716U - Split type two-stage free piston Stirling generator - Google Patents
Split type two-stage free piston Stirling generator Download PDFInfo
- Publication number
- CN215213716U CN215213716U CN202121461181.XU CN202121461181U CN215213716U CN 215213716 U CN215213716 U CN 215213716U CN 202121461181 U CN202121461181 U CN 202121461181U CN 215213716 U CN215213716 U CN 215213716U
- Authority
- CN
- China
- Prior art keywords
- stage
- cylinder
- temperature
- piston
- heater
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model provides a split type two-stage free piston Stirling generator, which comprises a first cylinder and a second cylinder, wherein a first-stage high-temperature-stage heater (2), a first-stage high-temperature heat regenerator (3), a step distribution piston (4), a second-stage low-temperature-stage heater (6), a second-stage low-temperature heat regenerator (7) and a cooler (8) are arranged in the first cylinder, and a power piston (12) is arranged in the second cylinder; because the generator comprises two stages of heat sources, the temperatures of the two stages of heat sources are different, the convection heat loss and the radiation heat loss of the high-temperature heat source and other heat losses generated by the high-temperature part of the generator are recovered by means of the low-temperature heat source, or the waste heat with different temperatures generated in daily life or industrial production process is simultaneously utilized, so that the utilization efficiency of energy is improved, and the system structure is more compact. And the power piston and the air distribution piston are respectively arranged in different cylinders, so that the complexity of the structure of the generator is reduced, and the interference between two power systems is reduced.
Description
Technical Field
The utility model relates to a free piston stirling generator technical field, in particular to split type two-stage free piston stirling generator.
Background
With the continuous increase of population and the improvement of living standard of people, the demand of energy is increasing day by day, and fossil energy is gradually exhausted; meanwhile, the use of fossil energy also causes problems of global warming and climate change. The above contradiction has prompted the search for new alternative energy sources, which requires more efficient energy utilization.
The two-stage harmonic reciprocating free piston Stirling engine is a high-efficiency external combustion type thermoelectric conversion machine. Unlike conventional free piston stirling engines, the two-stage harmonic reciprocating engine comprises a primary heater and a pair of regenerators with a primary intermediate heat exchanger between the two regenerators. In use, heat at a higher temperature is provided to the main heater of the engine, while heat at a lower temperature is provided to the intermediate heat exchanger. The said function is realized by means of one two-stage gas distributing piston, which replaces working fluid with two-stage heat exchanger and heat regenerator connected serially, the two-stage heat exchanger works at different temperature, and the lower temperature heat may be the waste gas from the main burner or the afterheat of other process in the combined heat and power apparatus.
The power piston and the gas distribution piston of the two-stage harmonic reciprocating free piston Stirling engine are positioned in the same cylinder, so that the structural complexity of the engine is increased, and the two vibration systems are interfered with each other, so that the stable operation of the whole engine is not facilitated.
SUMMERY OF THE UTILITY MODEL
In view of the above, there is a need for a split type two-stage free piston stirling generator with high energy utilization efficiency and simple and compact structure.
In order to solve the above problems, the utility model adopts the following technical proposal:
on one hand, the utility model provides a split type two-stage free piston Stirling generator, which comprises a first cylinder and a second cylinder, wherein a first-stage high-temperature stage heater (2), a first-stage high-temperature regenerator (3), a step distribution piston (4), a second-stage low-temperature stage heater (6), a second-stage low-temperature regenerator (7) and a cooler (8) are arranged in the first cylinder, and a power piston (12) is arranged in the second cylinder; the first cylinder and the second cylinder are connected through a pipeline, wherein:
a primary high-temperature stage expansion cavity (1) and a secondary low-temperature stage expansion cavity (5) are formed between the top of the stepped gas distribution piston (4) and the first cylinder, wherein the primary high-temperature stage expansion cavity (1) is close to the top of the first cylinder, the secondary low-temperature stage expansion cavity (5) is close to the middle of the first cylinder, the primary high-temperature stage heater (2) is arranged around the primary high-temperature stage expansion cavity (1), the secondary low-temperature stage heater (6) is arranged around the secondary low-temperature stage expansion cavity (5), and the primary high-temperature stage heater (2) and the secondary low-temperature stage heater (6) are connected through the primary high-temperature regenerator (3); the cooler (8) is arranged at the bottom of the first cylinder, and the secondary low-temperature regenerator (7) is connected between the cooler (8) and the secondary low-temperature level heater (6); a compression cavity is formed between the top of the power piston (12) and the second cylinder, and a back pressure cavity (15) is formed between the bottom of the power piston (12) and the second cylinder.
In some embodiments, the stepped displacer includes two portions of different cross-sectional areas connected in series, with the smaller area portion further from the compression chamber.
In some of these embodiments, the stepped displacer is similar in cross-sectional shape to the first cylinder.
In some embodiments, a partition plate (9) is further arranged in the first cylinder, and a gas distribution piston rod (16) at the bottom of the step gas distribution piston (4) penetrates through the partition plate.
In some embodiments, a valve piston plate spring (10) is further arranged in the first cylinder, and the valve piston plate spring (10) is elastically connected with the valve piston rod (16).
In some embodiments, a power piston plate spring (14) is further arranged in the second cylinder, and the power piston plate spring (14) is elastically connected with the power piston (12).
In some embodiments, the power piston (12) is further connected with a linear motor (13), and the power piston (12) can drive the linear motor (13) to generate electricity.
Adopt above-mentioned technical scheme, the utility model discloses the technological effect who realizes as follows:
the utility model provides a split type two-stage free piston Stirling generator, which comprises a first cylinder and a second cylinder, wherein a first-stage high-temperature-stage heater (2), a first-stage high-temperature heat regenerator (3), a step distribution piston (4), a second-stage low-temperature-stage heater (6), a second-stage low-temperature heat regenerator (7) and a cooler (8) are arranged in the first cylinder, and a power piston (12) is arranged in the second cylinder; the first cylinder and the second cylinder are connected through a pipeline. Because the generator comprises two stages of heat sources, the temperatures of the two stages of heat sources are different, the convection heat loss and the radiation heat loss of the high-temperature heat source and other heat losses generated by the high-temperature part of the generator are recovered by means of the low-temperature heat source, or the waste heat with different temperatures generated in daily life or industrial production process is simultaneously utilized, so that the utilization efficiency of energy is improved, and the system structure is more compact. And the power piston and the air distribution piston are respectively arranged in different cylinders, so that the complexity of the structure of the generator is reduced, and the interference between two power systems is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention or the description of the prior art will be briefly described below, and it is obvious that the drawings described below 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 structural diagram of a split type two-stage free piston stirling generator according to an embodiment of the present invention.
Fig. 2 is a diagram of an ideal cycle P-V of a split two-stage free piston stirling generator according to an embodiment of the present invention.
Fig. 3 is a diagram of an ideal cycle T-s of a split two-stage free piston stirling generator according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "horizontal", "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 description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.
Referring to fig. 1, a schematic structural diagram of a split type two-stage free piston stirling generator according to an embodiment of the present invention includes: the device comprises a first cylinder and a second cylinder, wherein a primary high-temperature stage heater (2), a primary high-temperature regenerator (3), a step distribution piston (4), a secondary low-temperature stage heater (6), a secondary low-temperature regenerator (7) and a cooler (8) are arranged in the first cylinder, and a power piston (12) is arranged in the second cylinder; the first cylinder and the second cylinder are connected through a pipeline.
A primary high-temperature stage expansion cavity (1) and a secondary low-temperature stage expansion cavity (5) are formed between the top of the stepped gas distribution piston (4) and the first cylinder, wherein the primary high-temperature stage expansion cavity (1) is close to the top of the first cylinder, the secondary low-temperature stage expansion cavity (5) is close to the middle of the first cylinder, the primary high-temperature stage heater (2) is arranged around the primary high-temperature stage expansion cavity (1), the secondary low-temperature stage heater (6) is arranged around the secondary low-temperature stage expansion cavity (5), and the primary high-temperature stage heater (2) and the secondary low-temperature stage heater (6) are connected through the primary high-temperature regenerator (3); the cooler (8) is arranged at the bottom of the first cylinder, and the secondary low-temperature regenerator (7) is connected between the cooler (8) and the secondary low-temperature level heater (6); a compression cavity is formed between the top of the power piston (12) and the second cylinder, and a back pressure cavity (15) is formed between the bottom of the power piston (12) and the second cylinder.
The utility model provides a split type two-stage free piston stirling generator replaces traditional free piston stirling generator's distribution piston and cylinder into the cascade structure, makes one-level high temperature level expansion chamber (1) and an annular second grade low temperature level expansion chamber (5) that constitute a cylindricality between step distribution piston (4) top and the first cylinder set up one-level high temperature level heater (2) and second grade low temperature level heater (6) respectively outside two enclosure spaces above-mentioned to add one-level high temperature regenerator (3) between the two-stage heater. The two-stage heaters use different external heat source temperatures, wherein the external heat source temperature used by the first-stage high-temperature stage heater (2) far away from the power piston (12) is higher than the external heat source temperature used by the second-stage low-temperature stage heater (6) near the power piston (12). The external heat source used by the two-stage heater can be waste heat resources of different types or different temperature areas generated in daily life or industrial production process, and the heat loss generated by the high-temperature stage heater or the high-temperature part of the free piston Stirling generator can be led into the two-stage low-temperature stage heater (6) by the aid of the heat recovery device to be recycled.
It will be appreciated that different heat source types can be accommodated by varying the two heater configurations described above.
In some of these embodiments, the stepped displacer (4) comprises two parts of different cross-sectional areas connected in series, and the part with the smaller area is farther from the compression chamber (15), and the stepped displacer (4) has a cross-sectional shape similar to the first cylinder.
In some embodiments, a partition plate (9) is further arranged in the first cylinder, and a gas distribution piston rod (16) at the bottom of the step gas distribution piston (4) penetrates through the partition plate (9).
In some embodiments, a valve piston plate spring (10) is further arranged in the first cylinder, and the valve piston plate spring (10) is elastically connected with the valve piston rod (16).
In some embodiments, a power piston plate spring (14) is further arranged in the second cylinder, and the power piston plate spring (14) is elastically connected with the power piston (12).
In some embodiments, the power piston (12) is further connected with a linear motor (13), and the power piston (12) can drive the linear motor (13) to generate electricity.
The principle of the working method of the split two-stage free piston stirling generator provided by the present invention is further described below, please refer to fig. 2 and 3, and the P-V diagram and T-s of the ideal cycle experienced by the working medium inside the generator includes the following steps:
process 1-2: the gas with mass m participates in an isothermal compression process in the compression cavity (11), the gas contracts and releases heat to the cooler (8), and meanwhile the power piston (12) moves to the top dead center;
process 2-3: the step gas distribution piston (4) moves downwards, gas in the compression cavity (11) reversely passes through the secondary low-temperature regenerator (7), and the temperature of the gas is increased after the gas absorbs heat stored in the regenerator (7) and then the gas enters the secondary low-temperature stage expansion cavity (5);
processes 3-4 and 3-4': a part of gas (m)1) The secondary expansion cavity (5) participates in an isothermal expansion process, absorbs heat in the secondary heater (6) and expands outwards; another part of the gas (m)2) The power piston continuously reversely passes through the primary high-temperature regenerator (3), absorbs the heat stored in the primary high-temperature regenerator (3), increases the temperature, enters the primary high-temperature stage expansion cavity (1), participates in the isothermal expansion process in the primary high-temperature stage expansion cavity (1), absorbs the heat in the primary high-temperature stage heater (2), expands outwards, and pushes the power piston (12) to move to a bottom dead center;
process 4' -4: gas (m) in the first-stage high-temperature stage expansion cavity (1)2) The heat energy positively passes through the primary high-temperature regenerator 3, and after partial heat is released to the primary high-temperature regenerator (3), the temperature is reduced, and the heat energy enters the secondary low-temperature stage expansion cavity (5);
process 4-1: the two parts of gas are converged, positively pass through the secondary low-temperature heat regenerator (7), the temperature is reduced after partial heat is released to the secondary low-temperature heat regenerator (7), and the gas enters the compression cavity (11) to perform an isothermal compression process and perform a new cycle.
The utility model provides a split type two-stage free piston Stirling generator, which comprises two stages of heat sources, wherein the temperatures of the two stages of heat sources are different, so that the convection and radiation heat loss of a high-temperature heat source are recovered by means of a low-temperature heat source, and other heat losses generated by the high-temperature part of the generator, or waste heat with different temperatures generated in daily life or industrial production process is simultaneously utilized, thereby improving the utilization efficiency of energy, and leading the system structure to be more compact; and the power piston and the air distribution piston are respectively arranged in different cylinders, so that the complexity of the structure of the generator is reduced, and the interference between two power systems is reduced.
The foregoing is only a preferred embodiment of the present invention, and the technical principles of the present invention have been specifically described, and the description is only for the purpose of explaining the principles of the present invention, and should not be construed as limiting the scope of the present invention in any way. Any modifications, equivalents and improvements made within the spirit and principles of the invention and other embodiments of the invention without the creative effort of those skilled in the art are intended to be included within the protection scope of the invention.
Claims (7)
1. The split type two-stage free piston Stirling generator is characterized by comprising a first cylinder and a second cylinder, wherein a first-stage high-temperature stage heater (2), a first-stage high-temperature regenerator (3), a step distribution piston (4), a second-stage low-temperature stage heater (6), a second-stage low-temperature regenerator (7) and a cooler (8) are arranged in the first cylinder, and a power piston (12) is arranged in the second cylinder; the first cylinder and the second cylinder are connected through a pipeline, wherein:
a primary high-temperature stage expansion cavity (1) and a secondary low-temperature stage expansion cavity (5) are formed between the top of the stepped gas distribution piston (4) and the first cylinder, wherein the primary high-temperature stage expansion cavity (1) is close to the top of the first cylinder, the secondary low-temperature stage expansion cavity (5) is close to the middle of the first cylinder, the primary high-temperature stage heater (2) is arranged around the primary high-temperature stage expansion cavity (1), the secondary low-temperature stage heater (6) is arranged around the secondary low-temperature stage expansion cavity (5), and the primary high-temperature stage heater (2) and the secondary low-temperature stage heater (6) are connected through the primary high-temperature regenerator (3); the cooler (8) is arranged at the bottom of the first cylinder, and the secondary low-temperature regenerator (7) is connected between the cooler (8) and the secondary low-temperature level heater (6); a compression cavity is formed between the top of the power piston (12) and the second cylinder, and a back pressure cavity is formed between the bottom of the power piston (12) and the second cylinder.
2. A split two-stage free piston stirling generator as claimed in claim 1 wherein the stepped displacer (4) comprises two parts of different cross-sectional area connected in series and the part of smaller area is further from the compression chamber.
3. A split two-stage free piston stirling generator as claimed in claim 2 wherein the stepped displacer (4) is of similar cross-sectional shape to the first cylinder.
4. A split type two-stage free piston stirling generator according to claim 2, wherein a partition plate (9) is further arranged in the first cylinder, and a gas distribution piston rod (16) at the bottom of the stepped gas distribution piston (4) penetrates through the partition plate (9).
5. A split two-stage free piston stirling generator according to claim 3 wherein a displacer plate spring (10) is also disposed within the first cylinder, the displacer plate spring (10) being resiliently connected to the displacer rod (16).
6. A split two-stage free piston stirling generator as claimed in claim 1 wherein a power piston plate spring (14) is also provided within the second cylinder, the power piston plate spring (14) being resiliently connected to the power piston (12).
7. A split two-stage free piston stirling generator as claimed in claim 6 wherein a linear motor (13) is further connected to the power piston (12), the power piston (12) being operable to drive the linear motor (13) to generate electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121461181.XU CN215213716U (en) | 2021-06-29 | 2021-06-29 | Split type two-stage free piston Stirling generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121461181.XU CN215213716U (en) | 2021-06-29 | 2021-06-29 | Split type two-stage free piston Stirling generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215213716U true CN215213716U (en) | 2021-12-17 |
Family
ID=79431928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121461181.XU Active CN215213716U (en) | 2021-06-29 | 2021-06-29 | Split type two-stage free piston Stirling generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215213716U (en) |
-
2021
- 2021-06-29 CN CN202121461181.XU patent/CN215213716U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Zare et al. | Free piston Stirling engines: A review | |
| EP2406485B1 (en) | Heat engine with regenerator and timed gas exchange | |
| US4429732A (en) | Regenerator structure for stirling-cycle, reciprocating thermal machines | |
| US4455826A (en) | Thermodynamic machine and method | |
| CN103225570B (en) | Generator and refrigerator coupled double Stirling engine | |
| CN215213717U (en) | Two-stage free piston Stirling generator | |
| CN110131070A (en) | A kind of combined power and cooling system and its working method based on free piston stirling engine | |
| JP2023082139A (en) | Efficient heat recovery engine | |
| US11795890B2 (en) | Multi-stage stirling cycle machine and a steady-state operating parameter control method therefor | |
| CN215213716U (en) | Split type two-stage free piston Stirling generator | |
| Arslan et al. | A Comprehensive Review on Stirling Engines | |
| CN115539242A (en) | Split type two-stage free piston Stirling generator and working method thereof | |
| Kussul et al. | Design of Ericsson heat engine with micro channel recuperator | |
| CN113137779B (en) | Combined cooling heating and power system without moving parts | |
| Gupta et al. | A review of heat engines | |
| Kwasi-Effah et al. | Stirling Engine Technology: A Technical Approach to Balance the Use of Renewable and Non-Renewable Energy Sources | |
| CN209942965U (en) | Stirling engine system with heat exchange unit | |
| CN102678383B (en) | Split type free piston stirling engine | |
| CN215633395U (en) | Split free piston Stirling engine with opposite common cavities | |
| CN115539241A (en) | Two-stage free piston Stirling generator | |
| Διαβάτης | Stirling engines for low temperature solar thermal electric power generation. | |
| CN220541811U (en) | High-pressure helium heat exchange system and regenerative heat engine system | |
| CN115539239A (en) | Split free piston Stirling engine with opposite common cavities | |
| CN202055932U (en) | Jugum sphenoidale type heat burning device | |
| CN215213715U (en) | Double-opposite-position electric feedback free piston Stirling generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |