CN104153910A - Opened circulating Stirling engine - Google Patents
Opened circulating Stirling engine Download PDFInfo
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- CN104153910A CN104153910A CN201410335475.6A CN201410335475A CN104153910A CN 104153910 A CN104153910 A CN 104153910A CN 201410335475 A CN201410335475 A CN 201410335475A CN 104153910 A CN104153910 A CN 104153910A
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Abstract
The invention relates to an opened circulating Stirling engine comprising a hot-end cylinder, a hot-end piston, a regenerator, a cold-end cylinder and a cold-end piston. The regenerator is an one-way regenerator, the cold-end inlet and hot-end outlet of the one-way regenerator form a low-temperature medium channel, and the hot-end inlet and cold-end outlet form a high-temperature medium channel; the cold inlet of the cold-end cylinder is communicated with the air, and the cold outlet is communicated with the cold-end inlet of the one-way regenerator; the hot inlet of the hot-end cylinder is communicated with the hot-end outlet of the one-way regenerator, and the hot outlet is communicated with the hot-end inlet of the one-way regenerator; the cold-end outlet of the one-way regenerator is communicated with the air. The circulating medium adopts the one-way flowing manner, the heat exchanging manner is optimized, and the regenerating efficiency is improved; an absolute sealing device for a power piston and an expanding piston is omitted, the friction resistance is reduced greatly, and engine mechanical efficiency is improved; meanwhile, the medium is of the air, the operating pressure and temperature are low, expensive temperature-resistant material is omitted, cost is low, reliability is high, energy is saved, and environment is protected.
Description
Technical field
The invention belongs to technical field of engines, be specifically related to Stirling engine.
Background technique
Stirling engine is a kind of reciprocating engine of external combustion, and owing to adopting external combustion circulation, the process that chemical energy changes heat energy into is to carry out outside the cylinder that produces power, and Working fluid flow mode is continuous process, not high to thermal source quality requirements.Therefore, Stirling engine aspect the extensive adaptability of the energy, have advantages of unique.In addition, Stirling engine is lower than compression ratio of internal-combustion engine, has noise little, the operational advantages of stable working.In recent years, because world energy sources cost generally goes up, the environmental problem of energy shortage and global warming and so on is day by day serious, makes the advantage of Stirling engine cause again showing great attention to of people.Stirling engine is not high to thermal source quality requirements, can realize the variation of thermal source, alleviates the dependence to fossil fuel, can reach the object of effectively utilizing traditional energy and the renewable sources of energy.
Stirling engine can be divided into three types according to basic structure: α type, β type, γ type, wherein α type Stirling engine (is comprised of cylinder and piston near cooler cold chamber, also be compression chamber), cooler, regenerator, heater, hot chamber (cylinder and piston near heater, consist of, be also expansion chamber) and power transmission part be grouped into.In α type Stirling engine, two pistons are all being born the function of transmitted power in cyclic process, are closed cycle mode of operation; Must adopt Special seal structure to seal, to prevent working medium leakage; Very high to the seal request of compression piston and expansion piston, sealing configuration is not only difficult technically, and make that engine structure is complicated, machines cumbersome, cause the manufacture cost of Stirling engine high, and the reliability of Sealing and life-span also have problems.The leakage of working medium is the common phenomenon of the failure of Stirling engine, is also one of the most scabrous problem.The leakage of working medium gently causes the decline of engine power and efficiency, and motor cisco unity malfunction is heavy cause complete machine to damage.
Summary of the invention
In order to overcome a sealing difficult problem for traditional Stirling engine existence, the shortcoming that manufacture is difficult, technological requirement is high, the present invention, by improving, provides a kind of open cycle Stirling engine.
The present invention be take air as open cycle working medium, and in regenerator, working medium adopts one-way flow mode, improves heat exchange mode, in existing piston type compound engine technical foundation, has designed the Stirling engine of a new open type circulating working mode.
Concrete technical solution is as follows:
Open cycle Stirling engine comprises hot junction cylinder, hot junction piston, heater, regenerator, cooler, cold junction cylinder and cold junction piston.Described regenerator is unidirectional regenerator, and one end of unidirectional regenerator is hot junction, and the other end is cold junction, and described hot junction is respectively equipped with hot side inlet and hot junction outlet, and described cold junction is respectively equipped with cold side inlet and cold side outlet; The cold side inlet of unidirectional regenerator and hot junction export mixes cryogenic fluid passage, hot side inlet and cold side outlet form high temperature refrigerant passage;
On the cylinder of described hot junction, be respectively equipped with hot junction suction valve and hot junction outlet valve, on described cold junction cylinder, be respectively equipped with cold junction suction valve and cold junction outlet valve;
The cold junction suction valve of described cold junction cylinder is communicated with atmosphere, and the cold junction outlet valve of cold junction cylinder is being communicated with the cold side inlet of unidirectional regenerator; The hot junction suction valve of described hot junction cylinder is being communicated with the hot junction outlet of unidirectional regenerator, between the hot junction suction valve of hot junction cylinder and the outlet of the hot junction of unidirectional regenerator, is provided with heater, and the hot junction outlet valve of hot junction cylinder is being communicated with the hot side inlet of unidirectional regenerator; The cold side outlet of unidirectional regenerator is communicated with atmosphere by exhausting waste gas valve; By controlling the switching moment of hot junction suction valve, hot junction outlet valve and cold junction suction valve, cold junction outlet valve, can reach the object of working medium open cycle and one-way flow.
Described unidirectional regenerator is the unidirectional regenerator of dividing wall type, according to the shape of heat transfer wall, can be divided into the unidirectional regenerator of tubular type, board-like unidirectional regenerator, the unidirectional regenerator of jacketed type etc.
Useful technique effect of the present invention embodies in the following areas:
(1) cycle fluid of Stirling engine of the present invention adopts one-way flow mode, and when the present invention works, when cold junction descent of piston, atmosphere enters cold junction cylinder by cold junction suction valve.After cold junction piston stroking upward pressurized air, air is pressed into regenerator cold side inlet pipe by cold junction outlet valve in cold junction cylinder, enters heater after absorbing heat in regenerator, enters the external work done of expanding of hot junction cylinder afterwards by hot junction suction valve; The heat that adds of thermal source only flows to hot cylinder and carries out expansion working, has greatly improved engine thermal efficiency; When the piston stroking upward of hot junction, the hot gas in the cylinder of hot junction flows to regenerator hot side inlet pipe by hot junction outlet valve, enters heat release after regenerator, and the hot gas after cooling is discharged in atmosphere; In regenerator, working medium is one-way flow mode, has improved heat exchange mode, improves effectiveness of regenerator; And without adopting positive confinement.Meanwhile, working medium adopts air, and working pressure and temperature are low, and without expensive temperature-resistant material, cost is low, reliability is high, energy-conserving and environment-protective;
(2) regenerator of prior art adopts working medium two-way flow, and alternately heat absorption and release is taken into account other index as very difficult in reduced flow resistance when improving effectiveness of regenerator.The present invention adopts one-way flow regenerator, and structural type has many kinds, as board-like, plate and fin type, rib-pipe type, shell of pipe type etc.; Its middle and high temperature refrigerant and cryogenic fluid have independently passage, all adopt one-way flow mode, when improving heat exchange mode, improving effectiveness of regenerator, can also take into account other index, such as reducing flow resistance;
(3) the present invention be take air as working medium circulation air inlet, and working medium can only be carried out expansion working by unidirectional inflow hot junction cylinder absorb heat in heater after, has improved engine thermal efficiency.Compression piston and expansion piston needn't adopt positive confinement device, and significantly capable of reducing friction resistance, improves engine mechanical efficiency;
(4) effectively utilize existing successful engine production technology, the cost of production of Stirling engine is significantly reduced, the inherent defect that overcomes the low and cost costliness of traditional Stirling engine efficiency, makes the application of Stirling engine obtain valuable development.
Accompanying drawing explanation
Fig. 1 is schematic diagram of the present invention.
Fig. 2 is the main TV structure stereogram that the present invention cuts two cylinders open.
Fig. 3 is the plan structure stereogram that the present invention removes cold junction cylinder head.
Sequence number in upper figure: 1-hot junction piston, 2-hot junction cylinder, 3-hot junction suction valve, 4-heater, 5-hot junction outlet valve, the unidirectional regenerator of 6-, 7-exhausting waste gas valve, 8-cold junction suction valve, 9-cold junction outlet valve, 10-cold junction cylinder, 11-cooler, 12-cold junction piston, 13-transmission of crankshaft system, 14-flywheel.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the present invention is further described.
Embodiment
Referring to Fig. 2 and Fig. 3, open cycle Stirling engine comprises hot junction cylinder 2, hot junction piston 1, unidirectional regenerator 6, cold junction cylinder 10, cold junction piston 12, transmission of crankshaft system and flywheel 14.Unidirectional regenerator 6 is the coaxial reverse-flow unidirectional regenerator of tubular type, and one end of unidirectional regenerator 6 is hot junction, and the other end is cold junction, and hot junction offers respectively hot side inlet and hot junction outlet, and cold junction offers respectively cold side inlet and cold side outlet.Referring to Fig. 1, between the cold side inlet of unidirectional regenerator 6 and hot junction outlet, form cryogenic fluid passage, between hot side inlet and cold side outlet, form high temperature refrigerant passage.
Referring to Fig. 1, on hot junction cylinder 2, be respectively equipped with hot junction suction valve 3 and hot junction outlet valve 5, on cold junction cylinder 10, be respectively equipped with cold junction suction valve 8 and cold junction outlet valve 9, the cold junction suction valve 8 of cold junction cylinder 10 is communicated with atmosphere, and the cold junction outlet valve 9 of cold junction cylinder 10 is being communicated with the cold side inlet of unidirectional regenerator 6; The hot junction suction valve 3 of hot junction cylinder 2 is being communicated with the hot junction outlet of unidirectional regenerator 6, between the hot junction suction valve 3 of hot junction cylinder 2 and the outlet of the hot junction of unidirectional regenerator 6, is in series with heater 4, and heater 4 is tubular heater; The cold side outlet of unidirectional regenerator 6 is communicated with atmosphere by exhausting waste gas valve 7.
Working principle of the present invention is described as follows:
Referring to Fig. 2, when cold junction piston 12 is descending, atmosphere enters cold junction cylinder 10 by cold junction suction valve 8.When cold junction piston 12 is up, when being compressed, the air in cold junction cylinder 10 outwards dispels the heat by cooler 11, air after compression enters unidirectional regenerator 6 by cold junction outlet valve 9,6 li of unidirectional regenerators, absorb after heat temperature raises and enter heater 4, continue to absorb heat in heater 4 after, by hot junction suction valve 3, enter hot junction cylinder 2, the external work done of expanding in hot junction cylinder 2.When expansion piston 1 is up, the hot air in hot junction cylinder 2 flows to unidirectional regenerator 6 by hot junction outlet valve 5, lowers the temperature after emitting heat in regenerator, and the air after cooling discharged in atmosphere, is realized the open cycle of Working fluid flow by exhausting waste gas valve 7.
Regenerator in the present invention adopts high-performance heat exchanger as regenerator, and structural type can have many kinds, as board-like, plate and fin type, rib-pipe type, shell of pipe type etc.Model machine of the invention process has adopted coaxial reverse type regenerator.
Heater in the present invention can adopt different heaters according to the difference of thermal source, can be but be not limited to tubular heater and fin heater.Model machine of the invention process has adopted tubular heater according to the liquid fuel in laboratory.
Piston-cylinder basic structure type in the present invention can be α type, can be also β type, γ type; What the invention process model machine adopted is α type, also claims double piston engine.
Transmission system in the present invention can be brace and connecting rod framework, can be also other drive mechanism, as diamond transmission mechanism, swash plate mechanism.Model machine of the invention process has adopted brace and connecting rod framework.
Claims (2)
1. open cycle Stirling engine, comprise hot junction cylinder, hot junction piston, heater, regenerator, cooler, cold junction cylinder and cold junction piston, it is characterized in that: described regenerator is unidirectional regenerator, one end of unidirectional regenerator is hot junction, the other end is cold junction, described hot junction is respectively equipped with hot side inlet and hot junction outlet, and described cold junction is respectively equipped with cold side inlet and cold side outlet; The cold side inlet of unidirectional regenerator and hot junction export mixes cryogenic fluid passage, hot side inlet and cold side outlet form high temperature refrigerant passage; On the cylinder of described hot junction, be respectively equipped with hot junction suction valve and hot junction outlet valve, on described cold junction cylinder, be respectively equipped with cold junction suction valve and cold junction outlet valve; The cold junction suction valve of described cold junction cylinder is communicated with atmosphere, and the cold junction outlet valve of cold junction cylinder is being communicated with the cold side inlet of unidirectional regenerator; The hot junction suction valve of described hot junction cylinder is being communicated with the hot junction outlet of unidirectional regenerator, between the hot junction suction valve of hot junction cylinder and the outlet of the hot junction of unidirectional regenerator, is provided with heater, and the hot junction outlet valve of hot junction cylinder is being communicated with the hot side inlet of unidirectional regenerator; The cold side outlet of unidirectional regenerator is communicated with atmosphere by exhausting waste gas valve; By controlling the switching moment of hot junction suction valve, hot junction outlet valve and cold junction suction valve, cold junction outlet valve, can reach the object of working medium open cycle and one-way flow.
2. open cycle Stirling engine according to claim 1, it is characterized in that: described unidirectional regenerator is the unidirectional regenerator of dividing wall type, according to the shape of heat transfer wall, can be divided into the unidirectional regenerator of tubular type, board-like unidirectional regenerator, the unidirectional regenerator of jacketed type etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410335475.6A CN104153910A (en) | 2014-07-15 | 2014-07-15 | Opened circulating Stirling engine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410335475.6A CN104153910A (en) | 2014-07-15 | 2014-07-15 | Opened circulating Stirling engine |
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| CN104153910A true CN104153910A (en) | 2014-11-19 |
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| CN201410335475.6A Pending CN104153910A (en) | 2014-07-15 | 2014-07-15 | Opened circulating Stirling engine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523157A (en) * | 2016-11-11 | 2017-03-22 | 丁元章 | Composite power generating system for fuel cell for vehicle |
| WO2018154214A1 (en) * | 2017-02-27 | 2018-08-30 | Vianney Rabhi | Regenerative cooling system |
| CN109306918A (en) * | 2018-09-26 | 2019-02-05 | 云南电网有限责任公司电力科学研究院 | A kind of direct thermomotor using liquid organic hydrogen storage material |
| CN109956509A (en) * | 2017-12-25 | 2019-07-02 | 北京佑陆科技有限公司 | The seawater desalination system based on open type Stirling cycle driven by wind energy conversion system |
| CN115750076A (en) * | 2022-12-08 | 2023-03-07 | 东风柳州汽车有限公司 | Engine cylinder cover and engine thereof |
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| DE3927853A1 (en) * | 1989-08-23 | 1991-02-28 | Christoph Feiler | IC engine using continuous supply of heat - has suction and compression cylinder and expansion and exhaust cylinder |
| CN2881124Y (en) * | 2005-10-31 | 2007-03-21 | 李建锋 | Piston type engine |
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2014
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Patent Citations (4)
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| DE3927853A1 (en) * | 1989-08-23 | 1991-02-28 | Christoph Feiler | IC engine using continuous supply of heat - has suction and compression cylinder and expansion and exhaust cylinder |
| CN2881124Y (en) * | 2005-10-31 | 2007-03-21 | 李建锋 | Piston type engine |
| CN201246230Y (en) * | 2008-08-18 | 2009-05-27 | 占小玲 | Water hydrogen making multiple-fuel external combustion air engine |
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Non-Patent Citations (1)
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| GIANNI BIDINI等: "EXTERNAL COMBUSTION ENGINE WITH STIRLING OPEN CYCLE", 《ENERGY CONVERSION ENGINEERING CONFERENCE》 * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106523157A (en) * | 2016-11-11 | 2017-03-22 | 丁元章 | Composite power generating system for fuel cell for vehicle |
| WO2018154214A1 (en) * | 2017-02-27 | 2018-08-30 | Vianney Rabhi | Regenerative cooling system |
| FR3063311A1 (en) * | 2017-02-27 | 2018-08-31 | Vianney Rabhi | REGENERATIVE COOLING SYSTEM |
| CN110234863A (en) * | 2017-02-27 | 2019-09-13 | V·拉比 | Re-generatively cooled system |
| CN110234863B (en) * | 2017-02-27 | 2022-03-18 | V·拉比 | Regenerative cooling system |
| AU2018225327B2 (en) * | 2017-02-27 | 2024-01-04 | Vianney Rabhi | Regenerative cooling system |
| CN109956509A (en) * | 2017-12-25 | 2019-07-02 | 北京佑陆科技有限公司 | The seawater desalination system based on open type Stirling cycle driven by wind energy conversion system |
| CN109306918A (en) * | 2018-09-26 | 2019-02-05 | 云南电网有限责任公司电力科学研究院 | A kind of direct thermomotor using liquid organic hydrogen storage material |
| CN109306918B (en) * | 2018-09-26 | 2021-09-21 | 云南电网有限责任公司电力科学研究院 | Hot air engine directly using liquid organic hydrogen storage material |
| CN115750076A (en) * | 2022-12-08 | 2023-03-07 | 东风柳州汽车有限公司 | Engine cylinder cover and engine thereof |
| CN115750076B (en) * | 2022-12-08 | 2024-04-05 | 东风柳州汽车有限公司 | Engine cylinder cover and engine thereof |
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Application publication date: 20141119 |
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