CN103032202B - Stirling engine - Google Patents
Stirling engine Download PDFInfo
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- CN103032202B CN103032202B CN201210515627.1A CN201210515627A CN103032202B CN 103032202 B CN103032202 B CN 103032202B CN 201210515627 A CN201210515627 A CN 201210515627A CN 103032202 B CN103032202 B CN 103032202B
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Abstract
The invention discloses a Stirling engine, which comprises a power piston cylinder pedestal, a cylinder, an air distribution piston, a heating head, an entire foamed metal porous medium reheater, a cooler, two power pistons, two linear generators, a first plate spring and a second plate spring. The cylinder comprises an inner cylinder and an outer cylinder. The tail ends of the inner and outer cylinders are fixedly connected with the power piston cylinder pedestal. The heating head, the porous medium reheater and the cooler are sequentially arranged between interlayer of the inner and outer cylinders from the front part to the tail part of the cylinder. The air distribution piston is inserted into the inner cylinder. An expansion cavity is formed in the front part of the outer cylinder. An air distribution piston rod and the first plate spring are fixed. A compression cavity is formed between the power piston cylinder pedestal and the tail end of the air distribution piston. Connecting rods of the power pistons are connected with rotors of the linear generators, and are connected with a connecting shaft. A shaft body of the connecting shaft and the second plate spring are fixed. The Stirling engine is simple in structure and easy to control.
Description
Technical field
The present invention relates to a kind of novel free piston stirling engine, belong to heat engine and utilize field.
Background technique
Stirling engine (Stirling Engine) is a kind of closed cycle reciprocating engine of external heat.In this class machine, working medium (being generally hydrogen, helium or air) is closed in circulation loop, the flow direction of the no-load voltage ratio controlled medium by volume of cylinder in closed cycle loop; Temperature and pressure lower compression working medium lower expands under higher temperature and pressure, thereby obtains positive circulation merit.Its thermal procession loops by Stirling.
Stirling engine with free piston is an important branch of Stirling engine, is a kind of power plant of realizing thermodynamic cycle by reciprocating motion of the pistons.This motion is because the interaction of gas force and power between gas force and parts produces.
As shown in Figure 5, existing Stirling engine with free piston comprises power piston 33, gas distribution piston 34, cylinder 35, gas distribution piston bar 36, power piston bar 32, leaf spring 30,31 etc., wherein the long distance of gas distribution piston bar 36 slides through power piston 33 and power piston bar 32, gas distribution piston bar 36 relies on the endoporus guiding of power piston 33 and power piston bar 32 to move back and forth, and there is a little machining error or assembly error in power piston 33 and power piston bar 32, will affect the motion of gas distribution piston bar 36, easily stuck; And the endoporus of power piston 33 and power piston bar 32 easily leaks gas, affect engine efficiency.So this Stirling engine complex structure, processing difficulties.
Traditional free piston stirling engine adopts gas spring as the restoring force of piston, but the piston of this gas spring effect is because producing drift without any machinery is fixing, gas distribution piston and power piston be close together or lean against respectively two ends, thereby running out of steam.For overcoming this problem, the Stirling company of Holland etc. has adopted the controlling method of many complexity.The technology of the Stirling engine with free piston of Infinia company employing leaf spring replacement gas spring is comparatively ripe, and First principle prototype starts test in October, 2007.Microgen company take the 1kW of Sunpower company with the technology of leaf spring Stirling engine with free piston as basis, develop mini domestic cogeneration system (MCHP).Yet these tradition are with Stirling engine with free piston control, the complex structure of gas spring; Adopt gas distribution piston bar can reduce the sealing in compression chamber through the structure of power piston, and install complicated; Infinia company is that the leaf spring Stirling engine with free piston leaf spring system of representative is installed complexity, the easy side-sway of piston, and unhelpful volume is large etc.; Tradition silk screen regenerator easy processing sealing-off, heat-transfer coefficient are not high.These problems have all reduced the efficiency of free piston stirling engine, have increased the complexity of structure.
Summary of the invention
The object of the present invention is to provide a kind of simple in structure, control simple Stirling engine.
The technological scheme that realizes above-mentioned purpose is: a kind of Stirling engine, comprise power piston cylinder pedestal, cylinder, gas distribution piston, heating head, regenerator and cooler, also comprise two power pistons, two linear electric generators, the first leaf spring and the second leaf spring, described regenerator is the metal porous medium regenerator of integral foam, described cylinder comprises inside cylinder and outside cylinder, outside cylinder is enclosed within outside inside cylinder, the front end intracavity space of the front opening of inside cylinder and outside cylinder connects, inside cylinder is all fixedly connected with power piston cylinder pedestal with outside cylinder tail end, described heating head, the metal porous medium regenerator of integral foam and cooler are arranged on inside cylinder and outside cylinder interlayer successively from cylinder front portion to afterbody, described gas distribution piston is inserted in inside cylinder, and be slidably matched with inside cylinder, gas distribution piston front end, between inside cylinder front end and outside cylinder front inner wall, form expansion chamber, gas distribution piston tail end has gas distribution piston bar, gas distribution piston bar and the first leaf spring middle part are fixing, the first leaf spring end is fixed on power piston cylinder pedestal, described power piston cylinder pedestal and inside cylinder, between outside cylinder and gas distribution piston tail end, form compression chamber, in described power piston cylinder pedestal, there are two actuating cylinder cylinder holes, two actuating cylinder cylinder hole front ends all communicate with compression chamber, the corresponding power piston that is sliding combined with in described two actuating cylinder cylinder holes, power piston tail end all has connecting rod separately, the mover of described two linear electric generators and the connecting rod load of power piston accordingly, the stator of linear electric generator and power piston cylinder pedestal are fixed, the connecting rod of power piston is all connected with coupking shaft, the axle body of coupking shaft and the second leaf spring middle part are fixing, the second leaf spring end is fixed on power piston cylinder pedestal.
The connecting rod afterbody of described two power pistons is connected with cross bar, coupking shaft one end is connected on cross bar, the other end is slidably supported on power piston cylinder pedestal by the first gas bearing, and the shaft of the connecting rod of two power pistons is slidably supported on power piston cylinder pedestal by corresponding the second gas bearing respectively.
The front end and back end of the gas distribution piston bar of described gas distribution piston respectively with piston-cylinder pedestal on corresponding bearing be slidably matched.
Described inside cylinder has engaging lug, and engaging lug and power piston cylinder pedestal are fixed, and outside cylinder has flange, and flange is connected with bolt with the flange of power piston cylinder pedestal.
Adopt after technique scheme, owing to adopting the metal porous medium regenerator of integral foam, when hot operation medium passes through, by thermal energy transfer, to porous medium, temperature reduces; And when low-temperature working medium passes through, by the heat energy absorbing in porous medium, rising temperature, has overcome the problems such as traditional silk screen regenerator easy processing sealing-off, heat-transfer coefficient are not high; Because gas distribution piston bar is not connected with connecting rod, the coupking shaft of two power pistons, so the motion of gas distribution piston and power piston do not influence each other, therefore simple in structure, is convenient to assembling; Owing to adopting two power pistons to drive two linear electric generators and the second leaf spring, therefore, power piston stable action, power piston good airproof performance, the gas spring that has overcome traditional Stirling engine with free piston is controlled the shortcomings such as the leaf spring system that complexity, complex structure and other problems and Infinia company are representative is installed complexity, and volume is large; The present invention not only processes simply, and cost is low, and efficiency is high, and has self-starting, without any need for advantages such as controlling componenies.
Accompanying drawing explanation
The present invention is further detailed explanation for the embodiment who provides below in conjunction with accompanying drawing.
Fig. 1 is the structural representation of Stirling engine of the present invention;
Fig. 2 is the A-A sectional view of Fig. 1;
Fig. 3 is the phase diagram of Fig. 1 when expansion chamber 23 expands;
Fig. 4 is the phase diagram of Fig. 1 when expansion chamber 23 compression;
Fig. 5 is the structural representation of existing Stirling engine with free piston.
Embodiment
As shown in Figure 5, existing Stirling engine with free piston comprises power piston 33, gas distribution piston 34, cylinder 35, gas distribution piston bar 36, power piston bar 32, leaf spring 30,31 etc., wherein the long distance of gas distribution piston bar 36 slides through power piston 33 and power piston bar 32, gas distribution piston bar 36 relies on the endoporus guiding of power piston 33 and power piston bar 32 to move back and forth, and there is a little machining error or assembly error in power piston 33 and power piston bar 32, will affect the motion of gas distribution piston bar 36, easily stuck; And the endoporus of power piston 33 and power piston bar 32 easily leaks gas, affect engine efficiency.
As Fig. 1, 2, 3, shown in 4, Stirling engine of the present invention, comprises power piston cylinder pedestal 20, cylinder 15, gas distribution piston 1, heating head 14, regenerator and cooler 13, also comprise two power pistons 3, 12, two linear electric generators 5, 11, the first leaf spring 4 and the second leaf spring 7, described regenerator is the metal porous medium regenerator 2 of integral foam, described cylinder 15 comprises inside cylinder 16 and outside cylinder 17, outside cylinder 17 is enclosed within outside inside cylinder 16, the front end intracavity space of the front opening of inside cylinder 16 and outside cylinder 17 connects, inside cylinder 16 is all fixedly connected with power piston cylinder pedestal 20 with outside cylinder 17 tail ends, described heating head 14, the metal porous medium regenerator 2 of integral foam and cooler 13 are arranged on successively from cylinder 15 front portions to afterbody inside cylinder 16 and outside cylinder 17 interlayers, and described gas distribution piston 1 is inserted in inside cylinder 16, and are slidably matched with inside cylinder 16, gas distribution piston 1 front end, between inside cylinder 16 front ends and outside cylinder 17 front inner wall, form expansion chamber 23, gas distribution piston 1 tail end has gas distribution piston bar 24, gas distribution piston bar 24 and the first leaf spring 4 middle parts are fixed, the first leaf spring 4 ends are fixed on power piston cylinder pedestal 20, described power piston cylinder pedestal 20 and inside cylinder 16, between outside cylinder 17 and gas distribution piston 1 tail end, form compression chamber 22, in described power piston cylinder pedestal 20, there are two actuating cylinder cylinder holes 25, 26, two actuating cylinder cylinder holes 25, 26 front ends all communicate with compression chamber 22, described two actuating cylinder cylinder holes 25, the 26 interior corresponding power pistons 3 that are sliding combined with, 12, power piston 3, 12 tail ends all have connecting rod (6 separately, 10, described two linear electric generators 5, 11 mover and corresponding power piston 3, 12 connecting rod 6, 10 loads, linear electric generator 5, 11 stator and power piston cylinder pedestal 20 are fixing, power piston 3, 12 connecting rod 6, 10 are all connected with coupking shaft 8, and the axle body of coupking shaft 8 and the second leaf spring 7 middle parts are fixed, and the second leaf spring 7 ends are fixed on power piston cylinder pedestal 20.
The porous medium that the metal porous medium regenerator of described integral foam generally adopts stainless steel, nickel or other refractory metal materials to make.
As shown in Figure 1, in order to make two power piston coordinations, and connecting rod and coupking shaft are moved steadily, connecting rod 6,10 afterbodys of described two power pistons 3,12 are connected with cross bar 9, coupking shaft 8 one end are connected on cross bar 9, the other end is slidably supported on power piston cylinder pedestal 20 by the first gas bearing 27, and the shaft of the connecting rod 6,10 of two power pistons 3,12 is slidably supported on power piston cylinder pedestal 20 by corresponding the second gas bearing 28 respectively.
As shown in Figure 1, for gas distribution piston bar is moved steadily, the front end and back end of the gas distribution piston bar 24 of described gas distribution piston 1 respectively with piston-cylinder pedestal 20 on corresponding bearing 29 be slidably matched.
As shown in Figure 1, 2, for the ease of installing, described inside cylinder 16 has engaging lug 18, and engaging lug 18 is fixing with power piston cylinder pedestal 20, and outside cylinder 17 has flange 19, and flange 19 is connected with bolt with the flange 21 of power piston cylinder pedestal 20.
As shown in Fig. 1,3,4, working principle of the present invention is as follows, when gas is heated in the interior expansion of expansion chamber 23 in heating head 14, drives gas distribution piston 1 to move backward, and the gas in compression chamber 22 is compressed.Gas distribution piston 1 moves at the end, makes gas distribution piston bar 24 and gas distribution piston 1 move to expansion chamber 23 ends to heating head 14 directions under the effect of inertia of the first leaf spring 4.Like this, gas distribution piston 1 is in the interior to-and-fro motion of cylinder 15, makes working gas between inside cylinder 16 and outside cylinder 17 interlayers and in cylinder 15, heats back and forth and expansion, cooling and compression.Owing to having compression chamber 22 between gas distribution piston 1 and two power pistons 3,12, therefore, gas-powered power two power pistons 3,12 in compression chamber 22 are to left movement.When two power pistons 3,12 move to after high order end, by the inertia of the second leaf spring 7, it is back moved to compression chamber 22 directions.When two power pistons 3,12 move to the low order end of its stroke, the interior gas effect in chamber 22 by compression, again to left movement.The phase angle difference of two power pistons 3,12 and gas distribution piston 1 is greatly about 60 degree left and right.The to-and-fro motion of power piston 3,12, mover (as: permanent magnet) to-and-fro motion in stator in drive link 6,10, produces electric energy.
Claims (4)
1. a Stirling engine, comprises power piston cylinder pedestal (20), cylinder (15), gas distribution piston (1), heating head (14), regenerator and cooler (13), it is characterized in that:
A, also comprise two power pistons (3,12), two linear electric generators (5,11), the first leaf spring (4) and the second leaf spring (7),
B, described regenerator are the metal porous medium regenerators of integral foam (2),
C, described cylinder (15) comprise inside cylinder (16) and outside cylinder (17), outside cylinder (17) is enclosed within outside inside cylinder (16), the front end intracavity space of the front opening of inside cylinder (16) and outside cylinder (17) connects, inside cylinder (16) is all fixedly connected with power piston cylinder pedestal (20) with outside cylinder (17) tail end
D, described heating head (14), the metal porous medium regenerator of integral foam (2) and cooler (13) are arranged on inside cylinder (16) and outside cylinder (17) interlayer to afterbody successively from cylinder (15) is anterior,
E, described gas distribution piston (1) are inserted in inside cylinder (16), and be slidably matched with inside cylinder (16), between gas distribution piston (1) front end, inside cylinder (16) front end and outside cylinder (17) front inner wall, form expansion chamber (23), gas distribution piston (1) tail end has gas distribution piston bar (24), gas distribution piston bar (24) is fixing with the first leaf spring (4) middle part, the first leaf spring (4) end is fixed on power piston cylinder pedestal (20)
Between f, described power piston cylinder pedestal (20) and inside cylinder (16), outside cylinder (17) and gas distribution piston (1) tail end, form compression chamber (22),
In g, described power piston cylinder pedestal (20), have two actuating cylinder cylinder holes (25,26), two actuating cylinder cylinder holes (25,26) front end all communicates with compression chamber (22),
The corresponding power piston (3,12) that is sliding combined with in h, described two actuating cylinder cylinder holes (25,26), power piston (3,12) tail end all has connecting rod (6,10) separately,
The mover of i, described two linear electric generators (5,11) and connecting rod (6, the 10) load of power piston (3,12) accordingly, the stator of linear electric generator (5,11) and power piston cylinder pedestal (20) are fixing, the connecting rod (6,10) of power piston (3,12) is all connected with coupking shaft (8), the axle body of coupking shaft (8) and the second leaf spring (7) middle part are fixing, and the second leaf spring (7) end is fixed on power piston cylinder pedestal (20).
2. Stirling engine according to claim 1, it is characterized in that: connecting rod (6, the 10) afterbody of described two power pistons (3,12) is connected with cross bar (9), coupking shaft (8) one end is connected on cross bar (9), it is upper that the other end is slidably supported on power piston cylinder pedestal (20) by the first gas bearing (27), and the shaft of the connecting rod (6,10) of two power pistons (3,12) is slidably supported on power piston cylinder pedestal (20) by corresponding the second gas bearing (28) respectively.
3. Stirling engine according to claim 1, is characterized in that: the front end and back end of the gas distribution piston bar (24) of described gas distribution piston (1) is slidably matched with the upper corresponding bearing (29) of piston-cylinder pedestal (20) respectively.
4. Stirling engine according to claim 1, it is characterized in that: described inside cylinder (16) has engaging lug (18), engaging lug (18) is fixing with power piston cylinder pedestal (20), outside cylinder (17) has flange (19), and flange (19) is connected with bolt with the flange (21) of power piston cylinder pedestal (20).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210515627.1A CN103032202B (en) | 2012-12-05 | 2012-12-05 | Stirling engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210515627.1A CN103032202B (en) | 2012-12-05 | 2012-12-05 | Stirling engine |
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| CN103032202A CN103032202A (en) | 2013-04-10 |
| CN103032202B true CN103032202B (en) | 2014-10-15 |
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| CN201210515627.1A Expired - Fee Related CN103032202B (en) | 2012-12-05 | 2012-12-05 | Stirling engine |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103423019A (en) * | 2013-07-23 | 2013-12-04 | 南京航空航天大学 | Magnetic restoring force type free piston Stirling engine |
| CN103953456A (en) * | 2014-04-15 | 2014-07-30 | 南京航空航天大学 | Spatial radiation-cooled free-piston Stirling engine |
| CN104481726A (en) * | 2014-11-06 | 2015-04-01 | 南京航空航天大学 | Three-piston type free-piston stirling engine |
| CN104895697B (en) * | 2015-05-29 | 2016-05-25 | 广西发现科技有限公司 | A kind of free-piston stirling machine |
| CN111076441A (en) * | 2019-11-18 | 2020-04-28 | 上海厚酷科技有限公司 | Refrigerator body |
| CN111023612A (en) * | 2019-11-18 | 2020-04-17 | 上海厚酷科技有限公司 | Refrigerator body assembly mounting structure |
| CN113565647B (en) * | 2021-08-23 | 2023-09-12 | 杨士中 | Y-shaped Stirling engine |
| CN114458472B (en) * | 2022-01-10 | 2024-04-05 | 中国科学院理化技术研究所 | Free piston Stirling generator |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| ZA753251B (en) * | 1974-06-07 | 1976-04-28 | Research Corp | Power piston actuated displacer piston driving means for free-piston stirling cycle type engine |
| WO1982000320A1 (en) * | 1980-07-14 | 1982-02-04 | Mechanical Tech Inc | Hermetic resonant piston posted displacer type stirling engine compressor alternator |
| JPS6043157A (en) * | 1983-08-20 | 1985-03-07 | Matsushita Electric Ind Co Ltd | Stirling engine |
| JPH07269968A (en) * | 1994-03-28 | 1995-10-20 | Mitsubishi Electric Corp | Vuilleumier heat pump |
| JP3619965B1 (en) * | 2003-07-22 | 2005-02-16 | シャープ株式会社 | Stirling agency |
| JP2006125798A (en) * | 2004-11-01 | 2006-05-18 | Sharp Corp | Sterling engine |
| JP2009062909A (en) * | 2007-09-07 | 2009-03-26 | Sharp Corp | Stirling engine and stirling engine mounting apparatus |
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- 2012-12-05 CN CN201210515627.1A patent/CN103032202B/en not_active Expired - Fee Related
Patent Citations (3)
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|---|---|---|---|---|
| US4380152A (en) * | 1980-07-25 | 1983-04-19 | Mechanical Technology Incorporated | Diaphragm displacer Stirling engine powered alternator-compressor |
| CN101387240A (en) * | 2007-08-09 | 2009-03-18 | 环球冷却有限公司 | Resonant stator balancing of free piston stirling machine |
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Non-Patent Citations (2)
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| JP昭57-501294A 1982.07.22 |
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Owner name: HUANG HULIN Free format text: FORMER OWNER: JIANGSU SUNSON SOLAR SCIENCE AND TECHNOLOGY DEVELOPMENT CO., LTD. Effective date: 20130508 Owner name: SUN ZHONGWEI Effective date: 20130508 |
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Effective date of registration: 20130508 Address after: 213002 No. 213, ERON Road, 8883 bell Road, bell tower, Jiangsu, Changzhou Applicant after: Huang Hulin Applicant after: Sun Zhongwei Address before: 213002 No. 213, ERON Road, 8883 bell Road, bell tower, Jiangsu, Changzhou Applicant before: Jiangsu Sunson Solar Science and Technology Development Co., Ltd. |
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