CN104675555A - Piston module for Sterling engine - Google Patents
Piston module for Sterling engine Download PDFInfo
- Publication number
- CN104675555A CN104675555A CN201310613428.9A CN201310613428A CN104675555A CN 104675555 A CN104675555 A CN 104675555A CN 201310613428 A CN201310613428 A CN 201310613428A CN 104675555 A CN104675555 A CN 104675555A
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- Prior art keywords
- piston
- heat
- rod
- seat
- shell
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G1/00—Hot gas positive-displacement engine plants
- F02G1/04—Hot gas positive-displacement engine plants of closed-cycle type
- F02G1/043—Hot gas positive-displacement engine plants of closed-cycle type the engine being operated by expansion and contraction of a mass of working gas which is heated and cooled in one of a plurality of constantly communicating expansible chambers, e.g. Stirling cycle type engines
- F02G1/053—Component parts or details
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G2270/00—Constructional features
- F02G2270/40—Piston assemblies
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
The invention discloses a piston module for a Sterling engine. The piston module for the Sterling engine comprises a piston seat and a piston case. One end of a piston rod is fixedly mounted on the piston seat, and the piston rod can move reciprocatingly in the axial direction of the piston seat; the piston case is detachably connected with the piston seat, and the opening of the piston case is provided with a heat transmission shield for blocking heat from being transmitted to the rod seal of the piston rod. Through isolation of the heat transmission shield, radiant heat transmission from the piston case to the piston rod and the piston seat can be greatly reduced, heat transmitted to the rod seal via the piston rod and the piston seat can be reduced, the operating conditions of the rod seal can be improved, the service life expectancy, the maintenance cycle and the efficiency of the Sterling engine can be enhanced; the metal mesh of the heat transmission shield can avoid forming air sealing to the piston case, avoid mechanical breakage due to pressure imbalance, and meanwhile can temporarily store heat to serve as a heat exchanger.
Description
Technical field
The present invention relates to engine art, particularly a kind of piston assembly for Stirling engine.
Background technique
Due to can with various heating sources cooperating, the application of Stirling engine is a lot, and the used heat that such as it can bring with the ignition heat of solar energy, fuel and industrial treatment is thermal source.The cylinder of Stirling engine separates with thermal source, the active part of piston can be avoided because of peak value of temperature, burning surplus products and the wearing and tearing that bring of burning and crack, therefore relative to the internal-combustion engine of such as diesel engine and petrol engine and so on, Stirling engine has very long expected life and maintenance period.
As shown in Figure 1, have V-type in prior art and arrange that the Stirling engine of cylinder comprises crankcase 1, bent axle 11 is rotatably installed in crankcase 1, and first connecting rod 2 and second connecting rod 5 are rotatably supported on bent axle 11 by crankpin 12.The other end of first connecting rod 2 is connected with expansion piston 3 with expansion piston bar 31 by the first crosshead 311, expansion piston 3 to-and-fro motion in expansion cylinder 4.Second connecting rod 5 is connected with compression piston 6 with compression piston bar 61 by the second crosshead 611, compression piston 6 to-and-fro motion in compression cylinder 7.Be provided with gas heater 10 between expansion cylinder 4 and compression cylinder 7, gas heater 10 can be made up of fin tube, the periphery parcel heat waste isolated material 13 of gas heater 10.Cooler 8 and heat exchanger 9 is provided with successively between compression cylinder 7 and gas heater 10.
After working gas is heated, in expansion cylinder 4, produce approximate isothermal expansion, and then promotion expansion piston 3 moves to bent axle 11.When expansion piston 3 does reversing motion away from bent axle 11, working gas flows into compression cylinder 7 from expansion cylinder 4, heat exchanger 9 is usually by can the wire netting of temporary transient store heat form, working gas by transferring heat to heat exchanger 9 during heat exchanger 9, and cools further by cooler 8.When compression piston 6 moves away from bent axle 11, working gas flows into expansion cylinder 4 from compression cylinder 7 through heat exchanger 9, is stored in transfer of heat in heat exchanger 9 in working gas, makes the temperature of working gas reach 650 DEG C.Then, working gas inflow gas heater 10, gas heater 10 improves the temperature of working gas further.Working gas is shuttling movement between compression cylinder 7 and expansion cylinder 4.
Although the crankshaft bearing in Stirling engine and the piston rod normally oil lubrication be connected with bent axle, keep dry with the expansion cylinder room of piston adaptation, only containing working gas.In order to obtain higher Energy transmission, working gas needs to keep very high pressure, sometimes more than 150 bar.
In order to ensure efficiency and the function of motor, the gas channel stoping oil to enter cylinder chamber and then pollution Stirling engine from crankcase is very important.This isolation is realized by rod seal, as shown in Figure 1, expansion piston bar 31 and compression piston bar 61 are coated with rod seal 34, and the outer cover of rod seal 34 is equipped with rod seal cover 33, allows piston rod to-and-fro motion while they provide sealing between bent axle and cylinder chamber.
The sealability of rod seal is most important.Gap is there is between rod seal and piston rod, if the temperature of rod seal is higher, lubricant oil enters in working gas through rod seal, mist of oil is easy to form carbon in heat exchanger, therefore substantially increase the flow resistance of working gas by heat exchanger, make the heat transference efficiency in heat exchanger between heat storage medium and working gas reduce simultaneously.These two aspects all causes the bad loss of the performance of Stirling engine and efficiency.In addition, if the temperature of rod seal is higher, heat can be delivered to oil lubrication position, lubricant oil is heated and exceeds standard temperature, and oil viscosity reduces, and greasy property weakens.
In order to make the effect optimization of rod seal, and make the piston ring be made up of polymer material being arranged in piston exterior have longer expection durability and life-span, the operating temperature of controlling rod sealing and the heat trnasfer of confined expansion cylinder chamber are even more important.
By introducing heat insulating element, by heat, the method remained in firing chamber is well known in the art.Such as, US4863807 discloses and arranges multilayer piston cap at piston head, the one deck in the middle part of this piston cap with multiple pore to reduce the heat trnasfer of engine chamber to piston.But, because the working gas of Stirling engine needs elevated pressures, expand after the gas in the pore of piston cap is heated, and then infringement surrounding structure, effect of heat insulation is not good enough.In addition, such as disclosed in US5282411, in cylinder chamber, use ceramic substrate or be combined ceramic substrate on the piston-top surface and heat insulation air cavity of piston.But only adding ceramic substrate at piston head also has deficiency: because stupalith is different with the hot expansibility of surrounding metal material, the working gas under high pressure makes to produce tension force between the two, causes ceramic segment to be easy to cracking or fracture.
In particular to Stirling engine, Robert's Stirling oneself in Scotland specification of his 1817 (Fig. 7) has proposed in the piston assembly closed, to introduce metal sheet in order to the thermal radiation weakened from piston head to piston base.But metal sheet provides very limited hot buffer action.Prior, in the Stirling engine of high pressure, in the piston bearing uneven hot temperature degree, introduce inflation piston assembly create a kind of substantial risk of rupture.
Summary of the invention
The present invention is to overcome defect in above-mentioned prior art, by arranging heat transfer barrier and metal foam/pottery in piston shell inside and arrange heat insulating element at each position of piston rod, confined expansion cylinder chamber is to the heat trnasfer of rod seal, reduce the operating temperature of rod seal, improve the performance of rod seal.
For achieving the above object, the invention provides a kind of piston assembly for Stirling engine, comprising: piston seat, one end of piston rod is fixedly mounted on piston seat, and piston rod can along the axial direction to-and-fro motion of piston seat; Piston shell, itself and piston seat removably connect, and the portion of aperture position place of piston shell is provided with the heat transfer barrier stoping delivered heat to described piston rod rod seal place.The isolation of heat transfer barrier greatly reduces the radiation heat transmission of piston shell to piston rod and piston seat, reduce the heat be delivered to by piston rod and piston seat on rod seal, what improve rod seal can operational condition, and the expected life of Stirling engine, maintenance period and efficiency are improved.
In technique scheme, heat transfer barrier comprises multiple layer metal net.The wire netting of heat transfer barrier can not form the sealing gland to piston shell, can avoid the mechanical disruption that imbalance of pressure causes, and temporary transient store heat, serves the effect of exchanger simultaneously.In addition, the lasting mixing of the working gas caused due to the to-and-fro motion of piston and the accelerating force of piston shell improves the heat of working gas, and the motion passing through the mesh restriction working gas of the wire netting of heat transfer barrier and the gas and vapor permeation caused thereof, the temperature of working gas and the heat trnasfer to miscellaneous part thereof can be reduced.
In technique scheme, multiple layer metal net is sintered together formation one block of web plate.Be sintered together by wire netting, form firmly web plate when can not increase any link between multiple layer metal net, the weight of such piston can minimally be changed.
In technique scheme, the thickness range of one block of web plate is 1 ~ 20mm.The web plate with this thickness comprises the wire netting of sufficient amount to provide effective heat-insulating efficiency, but the impost of piston can be controlled in the reasonable scope simultaneously.
In technique scheme, wire netting is tubulose.Compared with the wire netting of tabular, the wire netting of tubulose can be arranged in piston shell brokenly, and the heat transfer barrier being arranged in the multilayer tubular wire netting formation in piston shell has larger volume and the heat-insulating efficiency of Geng Gao.
In technique scheme, heat transfer barrier is curve-like or cone shape.Curve-like or cone shape heat transfer barrier define flexible fastening between heat transfer barrier and piston shell inwall, improve the tolerance of piston to vibration.
In technique scheme, between heat transfer barrier and the aperture position place of piston shell, be provided with the ceramic plate be connected with piston shell inwall.Pottery has effective isolation effect to radiation heat, and such ceramic plate can increase the isolation performance of piston, especially to the photothermal isolation of piston shell inwall.
In technique scheme, the center of ceramic plate is cup-shaped.The axial load that the ceramic plate of cup-shaped can bring the accelerating force of reciprocating motion of the pistons and tensile stress provide better tolerance.
In technique scheme, in the space be made up of piston shell top and heat transfer barrier, be provided with metal foam or pottery.The interpolation of foam can absorb the heat of piston shell inside, makes rod seal absorb less total amount of heat.
In technique scheme, between ceramic plate and the aperture position place of piston shell, be provided with the tapped through hole coaxial with piston shell, piston seat is provided with is with flange that is externally threaded and tapped through hole adaptation.Piston shell and piston seat are together by a threaded connection, processing cost is lower, and is easy to dismounting.
In technique scheme, the threaded joints between tapped through hole and flange is arranged with the piston assembly thread bush be made up of the isolated material of low heat conductivity.Piston assembly thread bush can stop piston shell to the heat trnasfer of piston seat, prevents the heat on piston seat to be delivered on rod seal by piston rod.
In technique scheme, be provided with in the attachment portion of piston rod and piston seat the bar cover be made up of the isolated material of low heat conductivity.Bar cover limits by the restriction heat be delivered on piston rod the upper heat being delivered to rod seal.
In technique scheme, the end of piston rod protrudes from flange and is provided with the outside thread be connected with nut; After piston shell is connected with piston seat, nut is contained in the center of ceramic plate.Nut can avoid the radiation heat in containing groove to be directly passed to piston rod, and passes to rod seal by piston rod.
In technique scheme, be provided with in the attachment portion of nut and piston rod the bar thread bush be made up of the isolated material of low heat conductivity.The nut be contained in containing groove is exposed to the radiation heat of internal piston, and the bar thread bush arranged between nut and piston rod prevents by the heat trnasfer of nut to piston rod.
In technique scheme, be provided with at the region near the mid-point on central axis of ceramic plate the small through hole that multiple expansion for working gas and compression provide space.The mechanical disruption that the pressure inequality that the sealing gland that small through hole can avoid piston shell to produce causes produces.
In technique scheme, piston assembly is combined as thermal source with solar energy or thermoelectricity.The temperature that these thermals source reach can meet the demand stoping rod seal overheated usually.
Accompanying drawing explanation
Fig. 1 has the sectional view that V-type arranges an embodiment of the Stirling engine of cylinder in prior art;
Fig. 2 is embodiment's exploded view of piston assembly of the present invention;
Fig. 3 is embodiment's overall diagram of piston assembly of the present invention;
Fig. 4 is the structural drawing of an embodiment of heat transfer barrier of the present invention.
Mark the following drawings mark thereon by reference to the accompanying drawings:
1-crankcase, 11-bent axle, 12-crankpin, 2-head rod, 3-expansion piston, 31-expansion piston bar, 311-first crosshead, 312-piston masthead, 32-piston shell, 321-metal foam/pottery, 322-conducts heat barrier, 323-containing groove, 324-tapped through hole, 325-ceramic plate, 326-tubulose grid, 327-piston assembly thread bush, 33-rod seal, 34-rod seal cover, 35-bar cover, 36-bar thread bush, 37-nut, 38-piston seat, 381-flange, 4-expansion cylinder, 5-second connecting rod, 6-compression piston, 61-compression piston bar, 611-second crosshead, 7-compression cylinder, 8-cooler, 9-heat exchanger, 10-heater, 13-heat waste isolated material.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail, but is to be understood that protection scope of the present invention not by the restriction of embodiment.
As shown in Figure 2, piston assembly 3 of the present invention comprises piston shell 32 and piston seat 38, and they combine by dismountable mode such as to be threaded, and form complete piston (as shown in Figure 3).Preferably, in order to make the top of the piston shell 32 towards expansion cylinder room bear high pressure, domed form is arranged at the top of piston shell 32.As an embodiment, as shown in Figure 2, be provided with tapped through hole 324 along its axis everywhere at the aperture position of piston shell 32, piston seat 38 be provided with tapped through hole 324 adaptation with externally threaded flange 381.The center of piston seat 38 is provided with the through hole for installing piston rod 31, is fixed on piston seat 38 by piston rod 31.Rod seal 34 is arranged on one end of close first crosshead 311 on piston rod 31 and is in not with piston reciprocates in expansion cylinder 4, is kept apart (with the expansion cylinder shown in Fig. 2 for reference direction) in the expansion cylinder top comprising dry working gas and the expansion cylinder bottom of being lubricated and bent axle.
Due to the position that piston shell 32 is piston assemblys that the working gas be heated contacts at first, therefore other positions of its temperature opposing pistons are higher, and the inside of piston shell can produce radiation heat, very easily transfers heat to piston rod or piston seat, and then pass to rod seal, the temperature of rod seal is raised.
In order to stop by the radiation heat transmission of piston shell 32 inside to rod seal 34 as much as possible, as shown in Figure 2, be provided with heat transfer barrier 322 between the dome and tapped through hole 324 of piston shell 32, heat transfer barrier 322 comprises multiple layer metal net.
Working gas is isolated into less gas column by the wire netting in heat transfer barrier, forces gas column to pass the mesh on wire netting surface, and simultaneously the partial heat of the gas column barrier that conducted heat absorbs.When piston reverses direction is moved, working gas gets back to piston head through heat transfer barrier again, and the heat stored in the wire netting of heat transfer barrier passes to working gas, is heated by working gas.Therefore, the wire netting of heat transfer barrier can not form the sealing gland to piston shell, can avoid the mechanical disruption that imbalance of pressure causes, and temporary transient store heat, serves the effect of exchanger simultaneously.In addition, the lasting mixing of the working gas caused due to the to-and-fro motion of piston and the accelerating force of piston shell improves the heat of working gas, and the motion passing through the mesh restriction working gas of the wire netting of heat transfer barrier and the gas and vapor permeation caused thereof, the temperature of working gas and the heat trnasfer to miscellaneous part thereof can be reduced.Further, heat transfer barrier is connected in piston shell, when not weakening or block existing gas channel (gas channel in such as cylinder), Stirling engine is normally worked.
Preferably, the heat transfer barrier in piston shell and thermal source keep certain distance, as far as possible near piston rod.With expansion cylinder room in a distance, heat transfer barrier can bear the less tension force brought by high-pressure working gas and heat flow, and in addition, heat transfer barrier itself can absorb less heat, can avoid the fault that wire netting Yin Gaowen causes in barrier of conducting heat.
Preferably, as shown in Figure 4, as another embodiment of heat transfer barrier, the wire netting of heat transfer barrier 322 is sintered together the independent web plate of formation one block.Be sintered together by wire netting, form firmly web plate when can not increase any link between multiple layer metal net, the weight of such piston can minimally change and the structure of the barrier that conducts heat is simple.Preferably, 2 ~ 50 wire nettings can be sintered together.
Preferably, the thickness range of web plate remains on 1 ~ 20mm.The web plate with this thickness comprises the wire netting of sufficient amount to provide effective heat-insulating efficiency, but the impost of piston can be controlled in the reasonable scope simultaneously.
As another embodiment, heat transfer barrier 322 also can curved shape or coniform, so that the top of piston rod 31 can be inserted in the space of heat transfer barrier 322 formation, the inner wall section of the piston shell 32 being directly exposed to rod seal 34 is reduced when there is not any insulation medium, and then the radiation heat of rod seal 34 is passed in restriction from the inwall of piston shell 32, and curve-like or cone shape heat transfer barrier define flexible fastening between heat transfer barrier and piston shell inwall, improve the tolerance of piston to vibration.
As another embodiment, replaceable or as a supplement, wire netting can be tubulose, shown in the tubulose grid 326 in such as Fig. 2.Compared with the wire netting of tabular, the wire netting of tubulose can be arranged in piston shell in an irregular pattern flexion torsion, and the heat transfer barrier being arranged in the multilayer tubular wire netting formation in piston shell has larger volume and the heat-insulating efficiency of Geng Gao.
The heat transfer barrier that above-mentioned various wire netting is formed can not increase unnecessary weight while provide heat isolation for piston, therefore can not weaken the whole efficiency of Stirling engine; Heat transfer barrier can greatly reduce the heat being delivered to rod seal, avoids rod seal to be exposed to and is heated in the heat-flash amount of working gas, reduces the temperature of rod seal, weakens because thermal stress is on the impact of the sealability of rod seal; In addition, because the exchanger function of wire netting makes the heat being delivered to rod seal and crankcase reduce in heat transfer barrier, decrease the thermal loss of expansion cylinder, improve the whole efficiency of Stirling engine.
According to another embodiment of the invention, between heat transfer barrier 322 and tapped through hole 324, be provided with the ceramic plate 325 be connected with piston shell inwall, form the barrier that further conducts heat.Pottery has effective isolation effect to radiation heat, and such ceramic plate can increase the isolation performance of piston, especially to the photothermal isolation of piston shell inwall.
According to another embodiment of the invention, as shown in Figure 2, the end of piston rod 31 protrudes from the end face of flange 381, and the end of piston rod 31 is provided with the outside thread of mounting nuts 37.Preferably, the top of nut 37 is provided with nut top, avoids piston masthead 312 to be directly exposed in the radiation heat of piston shell 32.
Preferably, the center of ceramic plate 325, in the cup-shaped coaxial with tapped through hole 324, forms containing groove 323, extends to form plectane bottom it from center to piston shell inwall, as shown in Figures 2 and 3, the ceramic plate between containing groove 323 and piston shell inwall and the angled formation inclined-plane of piston shell.The end face of containing groove 323 forms shoulder relative to tapped through hole 324, is convenient to prevent in the excessive screw-in piston shell 32 of piston seat 38 when installing.As shown in Figure 3, when piston shell 32 and piston seat 38 are installed together, flange 381 is threaded with tapped through hole 324, and nut 37 is contained in containing groove 323.Preferably, there is certain gap with the bottom of containing groove 323 in piston masthead 312.Ceramic plate 325 defines one deck between piston masthead 312 and the radiation heat of piston shell 32 inside isolates, and is equivalent to nut top.In addition, the axial load that can bring the accelerating force of reciprocating motion of the pistons of the ceramic plate 325 of cup-shaped and tensile stress provide better tolerance.
Preferably, near the containing groove 323 on ceramic plate 325, be provided with the small through hole that multiple expansion for working gas and compression provide space, piston shell 32 inside can not be made to produce sealing gland isolation, and the mechanical embrittlement because pressure inequality causes can be avoided.
According to another embodiment of the invention, in the space that and heat transfer screen 322 inner by piston shell 32 are formed, metal foam/pottery 321 is filled.The interpolation of metal foam/pottery 321 can absorb the heat of piston shell inside, makes rod seal absorb less total amount of heat.Relative to the liner of traditional isolated material, as the liner in US4863807 and US5282411, be filled in inner metal foam/pottery 321 not need to provide any confession pocket that it holds or chamber, therefore the profile of piston shell can not be changed, also durability and the strength character of piston shell can not be reduced because piston shell surface itself there is tie point.Because the temperature in Stirling cylinder is higher, foam is made up of metal or stupalith.
According to another embodiment of the invention, threaded joints between tapped through hole 324 and flange 381 is arranged with the piston assembly thread bush 327 be made up of the isolated material of low heat conductivity, to stop piston shell to the heat trnasfer of piston seat, the heat on piston seat is prevented to be delivered on rod seal by piston rod.The isolated material of low heat conductivity can be suitable polymer.
The surface of contact of the attachment portion of piston rod and piston seat defines the bridge of a heat transfer.Therefore, according to another embodiment of the invention, be provided with the attachment portion of piston seat 38 bar be made up of the isolated material of low heat conductivity at piston rod 31 and overlap 35, limit by the restriction heat be delivered on piston rod the upper heat being delivered to rod seal.
Similarly, the bar thread bush 36 be made up of the isolated material of low heat conductivity is also set between piston rod 31 and the screw thread of nut 37.The nut 37 be contained in containing groove 323 is exposed to the radiation heat of internal piston, and the cooperation of ceramic plate 325 and bar thread bush 36 can stop the radiation heat of piston shell to be directly or indirectly delivered on piston rod to greatest extent, and then is delivered on rod seal.
Any aforesaid embodiment is not only applicable to the thermal source for fuel device, is applicable to the various heating sources such as solar energy or thermoelectricity combination yet.Piston assembly of the present invention is highly suitable for the Stirling engine that is thermal source such as solar energy or thermoelectricity combination, and the temperature that these thermals source reach can meet the demand stoping rod seal overheated usually.
All aforesaid embodiments of the present invention can not cause any negative influence to power operation.Equally, existing Stirling engine can configure the piston assembly that the present invention comprises above-mentioned one or more heat insulating member when not needing to do any further restriction.Multiple heat insulating member of the present invention can be used alone, also can mutually subordinate to supplement.
By effective heat insulating member, what improve rod seal can operational condition, and the expected life of Stirling engine, maintenance period and efficiency are improved.
Be only several specific embodiment of the present invention above, but the present invention is not limited thereto, the changes that any person skilled in the art can think of all should fall into protection scope of the present invention.
Claims (16)
1. for a piston assembly for Stirling engine, it is characterized in that, comprising:
Piston seat, one end of piston rod is fixedly mounted on described piston seat, and described piston rod can along the axial direction to-and-fro motion of described piston seat;
Piston shell, itself and described piston seat removably connect, and the aperture position place of described piston shell is provided with the heat transfer barrier stoping delivered heat to described piston rod rod seal place.
2. piston assembly according to claim 1, is characterized in that, described heat transfer barrier comprises multiple layer metal net.
3. piston assembly according to claim 2, is characterized in that, described multiple layer metal net is sintered together formation one block of web plate.
4. piston assembly according to claim 3, is characterized in that, the thickness range of described one block of web plate is 1 ~ 20mm.
5. piston assembly according to claim 2, is characterized in that, described wire netting is tubulose.
6. piston assembly according to claim 1, is characterized in that, described heat transfer barrier is curve-like or cone shape.
7. piston assembly according to claim 1 and 2, is characterized in that, is provided with the ceramic plate be connected with described piston shell inwall between described heat transfer barrier and the aperture position place of described piston shell.
8. piston assembly according to claim 7, is characterized in that, the center of described ceramic plate is cup-shaped.
9. piston assembly according to claim 1, is characterized in that, in the space be made up of described piston shell top and described heat transfer barrier, be provided with metal foam or pottery.
10. piston assembly according to claim 8, it is characterized in that, between described ceramic plate and the aperture position place of described piston shell, be provided with the tapped through hole coaxial with described piston shell, described piston seat is provided with the flange being with externally threaded and described tapped through hole adaptation.
11. piston assemblys according to claim 10, is characterized in that, the threaded joints between described tapped through hole and described flange is arranged with the piston assembly thread bush be made up of the isolated material of low heat conductivity.
12. piston assemblys according to claim 11, is characterized in that, are provided with in the attachment portion of described piston rod and described piston seat the bar cover be made up of the isolated material of low heat conductivity.
13. piston assemblys according to claim 10, is characterized in that, the end of described piston rod protrudes from described flange and is provided with the outside thread be connected with nut; After described piston shell is connected with described piston seat, described nut is contained in the center of described ceramic plate.
14. piston assemblys according to claim 13, is characterized in that, are provided with in the attachment portion of described nut and described piston rod the bar thread bush be made up of the isolated material of low heat conductivity.
15. piston assemblys according to claim 8, is characterized in that, are provided with at the region near the mid-point on central axis of described ceramic plate the small through hole that multiple expansion for working gas and compression provide space.
16. piston assemblys according to claim 1, is characterized in that, described piston assembly is combined as thermal source with solar energy or thermoelectricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310613428.9A CN104675555A (en) | 2013-11-27 | 2013-11-27 | Piston module for Sterling engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310613428.9A CN104675555A (en) | 2013-11-27 | 2013-11-27 | Piston module for Sterling engine |
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| CN104675555A true CN104675555A (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310613428.9A Pending CN104675555A (en) | 2013-11-27 | 2013-11-27 | Piston module for Sterling engine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109955102A (en) * | 2019-03-25 | 2019-07-02 | 安徽瑞林精科股份有限公司 | Feed mechanism is used in a kind of processing of automobile engine cylinder-body |
| CN111757981A (en) * | 2018-01-02 | 2020-10-09 | 马斯通公司 | Stirling engine comprising a metal foam regenerator |
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| CN203655467U (en) * | 2013-11-27 | 2014-06-18 | 科林洁能能源公司 | Piston assembly for Stirling engine |
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| US3302392A (en) * | 1964-05-29 | 1967-02-07 | Philips Corp | Device comprising at least one sealing element between two coaxially arranged elements which are movable with respect to each other |
| JPS5591741A (en) * | 1978-12-28 | 1980-07-11 | Nissan Motor Co Ltd | Piston rod for hot gas engine |
| JPS5896148A (en) * | 1981-12-02 | 1983-06-08 | Aisin Seiki Co Ltd | Piston of gas engine |
| CN102356226A (en) * | 2009-02-11 | 2012-02-15 | 斯特林生物能源股份有限公司 | Stirling engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111757981A (en) * | 2018-01-02 | 2020-10-09 | 马斯通公司 | Stirling engine comprising a metal foam regenerator |
| CN109955102A (en) * | 2019-03-25 | 2019-07-02 | 安徽瑞林精科股份有限公司 | Feed mechanism is used in a kind of processing of automobile engine cylinder-body |
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