CN203114450U - Stirling engine - Google Patents
Stirling engine Download PDFInfo
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- CN203114450U CN203114450U CN 201220662580 CN201220662580U CN203114450U CN 203114450 U CN203114450 U CN 203114450U CN 201220662580 CN201220662580 CN 201220662580 CN 201220662580 U CN201220662580 U CN 201220662580U CN 203114450 U CN203114450 U CN 203114450U
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Abstract
The utility model discloses a Stirling engine which comprises a power piston cylinder base, a cylinder, a displacer piston, a heating tip, an integral foaming metal porous medium heat regenerator, 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 both the inner cylinder and the outer cylinder are fixedly connected with the power piston cylinder base; the heating tip, the porous medium heat regenerator and the cooler are sequentially arranged in an interlayer between the inner cylinder and the outer cylinder from the front part to the tail part of the cylinder; the displacer piston is inserted in the inner cylinder; the front part of the outer cylinder is provided with an expansion cavity; a displacer piston rod is fixed with the first plate spring; a compression cavity is formed between the power piston cylinder base and the tail end of the displacer piston; connecting rods of the power pistons are connected with rotors of the linear generators; the connecting rods are connected with a coupling shaft; and a shaft body of the coupling shaft is fixed with the second plate spring. The Stirling engine has a simple structure and is simple to control.
Description
Technical field
The utility model relates to a kind of novel free piston stirling engine, belongs to heat engine and utilizes the 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 the circulation loop, by the flow direction of no-load voltage ratio control working medium in the closed cycle loop of volume of cylinder; Temperature and pressure lower compression working medium lower expands under higher temperature and pressure, thereby obtains positive circulation merit.Its thermal procession is undertaken by the Stirling circulation.
The free piston type Stirling engine 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 be since between gas force and parts the interaction of gas force and power produce.
As shown in Figure 5, existing free piston type Stirling engine 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 gas distribution piston bar 36 long distances slide 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 machining error or assembly error appear in power piston 33 and power piston bar 32 a little, will influence the motion of gas distribution piston bar 36, stuck easily; And the endoporus of power piston 33 and power piston bar 32 leaks gas easily, influences 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 mechanical fixation, gas distribution piston and power piston are close together or lean against two ends respectively, thereby run 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 free piston type Stirling engine of Infinia company employing leaf spring replacement gas spring is comparatively ripe, and first principle prototype begins test in October, 2007.Microgen company develops mini domestic cogeneration system (MCHP) based on the technology of the 1kW of Sunpower company band plate spring free piston type Stirling engine.Yet these tradition are with the control of free piston type Stirling engine, the complex structure of gas spring; The structure that adopts the gas distribution piston bar to pass power piston can reduce the sealing in the compression chamber, and installs complicated; Infinia company is that complexity is installed by the leaf spring free piston type Stirling engine leaf spring system of representative, the easy side-sway of piston, and unhelpful volume is big etc.; Tradition silk screen regenerator easy processing sealing-off, heat-transfer coefficient are not high.These problems have all reduced the efficient of free piston stirling engine, have increased the complexity of structure.
Summary of the invention
The purpose of this utility model be 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, first leaf spring and 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 the inside cylinder, the front end intracavity space of the front opening of inside cylinder and outside cylinder connects, inside cylinder is all fixedlyed connected with power piston cylinder pedestal with the outside cylinder tail end, described heating head, the metal porous medium regenerator of integral foam and cooler are installed in successively from the cylinder front portion to afterbody inside cylinder and the outside cylinder interlayer, described gas distribution piston is inserted in the inside cylinder, and be slidingly matched with inside cylinder, the gas distribution piston front end, form expansion chamber between inside cylinder front end and the outside cylinder front inner wall, the gas distribution piston tail end has the gas distribution piston bar, gas distribution piston bar and first leaf spring middle part are fixing, the first leaf spring end is fixed on the power piston cylinder pedestal, described power piston cylinder pedestal and inside cylinder, constitute compression chamber between outside cylinder and the gas distribution piston tail end, have two actuating cylinder cylinder holes in the described power piston cylinder pedestal, 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, the 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 all is connected with coupking shaft, the axle body of coupking shaft and second leaf spring middle part are fixing, and the second leaf spring end is fixed on the 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 the cross bar, the other end is slidably supported on the power piston cylinder pedestal by first gas bearing, and the shaft of the connecting rod of two power pistons is slidably supported on the power piston cylinder pedestal by corresponding second gas bearing respectively.
The front end and back end of the gas distribution piston bar of described gas distribution piston respectively with the piston-cylinder pedestal on corresponding bearing be slidingly 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.
After adopting technique scheme, owing to adopt the metal porous medium regenerator of integral foam, when the hot operation medium passes through, give porous medium with thermal energy transfer, temperature reduces; And when the low-temperature working medium passed through, with the heat energy that absorbs in the porous medium, the rising temperature had overcome problems such as traditional silk screen regenerator easy processing sealing-off, heat-transfer coefficient are not high; Because the 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, and is therefore simple in structure, is convenient to assemble; Owing to adopt two power pistons to drive two linear electric generators and second leaf spring, therefore, the power piston stable action, the power piston good airproof performance, gas spring control complexity, complex structure and other problems and the Infinia company that has overcome traditional free piston type Stirling engine is shortcomings such as complexity is installed by the leaf spring system of representative, and volume is big; The utility model is not only processed simply, and cost is low, the efficient height, and have self-starting, without any need for advantages such as controlling componenies.
Description of drawings
The embodiment who provides below in conjunction with accompanying drawing is described in further detail the utility model.
Fig. 1 is the structural representation of Stirling engine of the present utility model;
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 compressions;
Fig. 5 is the structural representation of existing free piston type Stirling engine.
Embodiment
As shown in Figure 5, existing free piston type Stirling engine 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 gas distribution piston bar 36 long distances slide 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 machining error or assembly error appear in power piston 33 and power piston bar 32 a little, will influence the motion of gas distribution piston bar 36, stuck easily; And the endoporus of power piston 33 and power piston bar 32 leaks gas easily, influences engine efficiency.
As Fig. 1,2,3, shown in 4, Stirling engine of the present utility model, comprise 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, first leaf spring 4 and 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 the 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 fixedlyed 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 installed in successively from cylinder 15 front portions to afterbody inside cylinder 16 and outside cylinder 17 interlayers, described gas distribution piston 1 is inserted in the inside cylinder 16, and be slidingly matched with inside cylinder 16, gas distribution piston 1 front end, form expansion chamber 23 between inside cylinder 16 front ends and outside cylinder 17 front inner wall, gas distribution piston 1 tail end has gas distribution piston bar 24, gas distribution piston bar 24 and first leaf spring, 4 middle parts are fixed, first leaf spring, 4 ends are fixed on the power piston cylinder pedestal 20, described power piston cylinder pedestal 20 and inside cylinder 16, constitute compression chamber 22 between outside cylinder 17 and gas distribution piston 1 tail end, have two actuating cylinder cylinder holes 25 in the described power piston cylinder pedestal 20,26, two actuating cylinder cylinder holes 25,26 front ends all communicate with compression chamber 22, described two actuating cylinder cylinder holes 25, the corresponding power piston 3 that is sliding combined with in 26,12, 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 all are connected with coupking shaft 8, the axle body of coupking shaft 8 and second leaf spring, 7 middle parts are fixed, and second leaf spring, 7 ends are fixed on the 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, described two power pistons 3,12 connecting rod 6,10 afterbodys are connected with cross bar 9, coupking shaft 8 one ends are connected on the cross bar 9, the other end is slidably supported on the power piston cylinder pedestal 20 by first gas bearing 27, and two power pistons 3,12 connecting rod 6,10 shafts are slidably supported on the power piston cylinder pedestal 20 by corresponding second gas bearing 28 respectively.
As shown in Figure 1, move steadily in order to make the gas distribution piston bar, 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 slidingly 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 the flange of flange 19 and power piston cylinder pedestal 20 21 is connected with bolt.
Shown in Fig. 1,3,4, the utility model working principle is as follows, expands in expansion chamber 23 when gas is heated in heating head 14, and it is mobile backward to drive gas distribution piston 1, and the gas in the compression chamber 22 is compressed.After gas distribution piston 1 moves to the end, under the effect of inertia of first leaf spring 4, make gas distribution piston bar 24 and gas distribution piston 1 move to expansion chamber 23 ends to heating head 14 directions.Like this, gas distribution piston 1 to-and-fro motion in cylinder 15 makes working gas and heats back and forth and expand, cool off and compress between inside cylinder 16 and outside cylinder 17 interlayers and in the cylinder 15.Owing between gas distribution piston 1 and two power pistons 3,12 compression chamber 22 is arranged, therefore, interior two power pistons 3 of gas-powered power, 12 of compression chamber 22 are to left movement.After two power pistons 3,12 move to high order end, by the inertia of second leaf spring 7 it is back moved to compression chamber 22 directions.When two power pistons 3,12 moved to the low order end of its stroke, gas effect in the chamber 22 by compression was again to left movement.Two power pistons 3,12 and the phase angle difference of gas distribution piston 1 greatly about about 60 degree.Power piston 3,12 to-and-fro motion, the mover on the drive link 6,10 (as: permanent magnet) to-and-fro motion in stator 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), first leaf spring (4) and 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 the 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 fixedlyed 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 installed in 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 the inside cylinder (16), and be slidingly matched with inside cylinder (16), form expansion chamber (23) between gas distribution piston (1) front end, inside cylinder (16) front end and outside cylinder (17) front inner wall, gas distribution piston (1) tail end has gas distribution piston bar (24), gas distribution piston bar (24) is fixing with first leaf spring (4) middle part, first leaf spring (4) end is fixed on the power piston cylinder pedestal (20)
Constitute compression chamber (22) between f, described power piston cylinder pedestal (20) and inside cylinder (16), outside cylinder (17) and gas distribution piston (1) tail end,
Have two actuating cylinder cylinder holes (25,26) in g, the described power piston cylinder pedestal (20), 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 the 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) all is connected with coupking shaft (8), the axle body of coupking shaft (8) and second leaf spring (7) middle part are fixing, and second leaf spring (7) end is fixed on the power piston cylinder pedestal (20).
2. Stirling engine according to claim 1, its spy is being characterised 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 ends are connected on the cross bar (9), the other end is slidably supported on the power piston cylinder pedestal (20) by first gas bearing (27), and the shaft of the connecting rod (6,10) of two power pistons (3,12) is slidably supported on the power piston cylinder pedestal (20) by corresponding second gas bearing (28) respectively.
3. Stirling engine according to claim 1, its spy is being characterised in that: the front end and back end of the gas distribution piston bar (24) of described gas distribution piston (1) is gone up corresponding bearing (29) with piston-cylinder pedestal (20) respectively and is slidingly matched.
4. Stirling engine according to claim 1, its spy is being characterised 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 |
|---|---|---|---|
| CN 201220662580 CN203114450U (en) | 2012-12-05 | 2012-12-05 | Stirling engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220662580 CN203114450U (en) | 2012-12-05 | 2012-12-05 | Stirling engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203114450U true CN203114450U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220662580 Expired - Lifetime CN203114450U (en) | 2012-12-05 | 2012-12-05 | Stirling engine |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032202A (en) * | 2012-12-05 | 2013-04-10 | 江苏尚森太阳能科技发展有限公司 | Stirling engine |
| CN103527345A (en) * | 2013-11-06 | 2014-01-22 | 大连宏海新能源发展有限公司 | Internal recycling working medium gas supercharging equipment of Stirling engine |
| CN106164605A (en) * | 2014-03-25 | 2016-11-23 | 住友重机械工业株式会社 | Sterlin refrigerator |
-
2012
- 2012-12-05 CN CN 201220662580 patent/CN203114450U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103032202A (en) * | 2012-12-05 | 2013-04-10 | 江苏尚森太阳能科技发展有限公司 | Stirling engine |
| CN103527345A (en) * | 2013-11-06 | 2014-01-22 | 大连宏海新能源发展有限公司 | Internal recycling working medium gas supercharging equipment of Stirling engine |
| CN103527345B (en) * | 2013-11-06 | 2015-06-17 | 大连宏海新能源发展有限公司 | Internal recycling working medium gas supercharging equipment of Stirling engine |
| CN106164605A (en) * | 2014-03-25 | 2016-11-23 | 住友重机械工业株式会社 | Sterlin refrigerator |
| CN106164605B (en) * | 2014-03-25 | 2018-08-14 | 住友重机械工业株式会社 | Sterlin refrigerator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130807 Effective date of abandoning: 20141015 |
|
| RGAV | Abandon patent right to avoid regrant |