CN204646451U - The Stirling engine improved - Google Patents
The Stirling engine improved Download PDFInfo
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- CN204646451U CN204646451U CN201520117157.2U CN201520117157U CN204646451U CN 204646451 U CN204646451 U CN 204646451U CN 201520117157 U CN201520117157 U CN 201520117157U CN 204646451 U CN204646451 U CN 204646451U
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- spring
- displacer
- stirling engine
- gas
- attached
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Abstract
The utility model relates to a kind of Stirling engine of improvement.Be preferably the spring of gas spring and be connected in displacer and housing or alternatively between power piston.Described spring is lax to apply centering power on displacer in the basic neutral position of displacer.The load of described spring by reducing in displacer drive link mechanism from applying centering power on displacer.If desired, by design spring, make the quality of spring constant and operation thereof form pump element, thus it will utilize atmospheric air by engine booster to operation pressure as pump in initial startup operation process, then can be reduced to almost nil by the power of displacer linkage mechanism.
Description
Technical field
The utility model relates generally to crank type or kinematic Stirling engine, more particularly, a kind of size for reducing motor and cost is related to and the life-span increasing displacer drive link mechanism also provides a kind of simply from the improvement of booster body simultaneously.
Background technique
The model utility of this application is the open source literature No.129 submitted in U.S.Patent & Trademark Office on July 20th, 1984,280 and No.129, and the theme of 281.
Most places in the world, particularly developing country, all suffer the hardship of energy supply deficiency.As a result, dropped into and make great efforts in a large number to build the motor that effectively can utilize those local available power.This energy comprises timber, rice bran or other vegetables or animal waste product.The leading motor demonstrating great potential is the Stirling engine that heat energy can be directly changed into mechanical energy.
Stirling engine these application in, cost and serviceability extremely important.They are sufficiently cheap, make can bear for their those people of those needs, and must provide reliable operation, without the need to keeping in repair frequently, this is because they are often used in the place be difficult to close to sufficient maintenance facility.
Fragile especially in crank type Stirling engine is linkage mechanism, and the power delivery axle of Stirling engine is connected to its displacer and power piston with driving by linkage mechanism.In order to provide this linkage mechanism providing reasonable and acceptable expected life, it is larger that the bearing in these linkage mechanisms must use traditional design to manufacture.If the load forces in displacer drive link mechanism reduces, then the bearing of these linkage mechanisms also can correspondingly manufacture less, and will show the longer life-span.
Therefore, intention of the present utility model and object are to provide a kind of device not changing again the operating characteristics of motor for the load forces reduced in displacer drive link mechanism.This causes more lasting, less and more cheap bearing and linkage mechanism.
Frequent expectation structure is used for the Stirling of aforesaid operations and starts, thus makes this Stirling engine utilize normal atmosphere air as its working gas.Due to this Stirling engine under higher middle pressure than more effectively utilizing working gas to operate at atmospheric pressure, for proposing various design by the pump of the crankshaft drives of motor.By this pump, motor can utilize working gas to start at atmosheric pressure, and can do enough work with by himself pump to operation pressure.But the past adds lot of materials and labor cost for the pump that this object designs, and add the complexity of motor, thus excessively increase sales price.
Therefore, further intention of the present utility model and object be to provide a kind of need in motor minimum additional structure from pumping mechanism.
Model utility content
The utility model is the improvement to the such as Stirling engine of Types Below, and in the Stirling engine of the type, reciprocal displacer is attached to installation reciprocal power piston in the housing or the some other device be attached to for driving displacer with being driven.This improvement is the spring being attached to described displacer.The basic neutral position that described spring is coupled in described displacer is relaxed, and applies centering power, to reduce the load of displacer drive link mechanism to described displacer.Preferably; one end of described spring is attached to the point between described displacer and linkage mechanism to be protected; and the other end of this spring is attached to the housing of described crank type Stirling engine, but it also can be connected between described displacer and described power piston.More preferably gas spring, this gas spring can be modified simultaneously to comprise pumping safety check and passage, thus makes it that engine pump is delivered to equilibrium operating pressure and then start to operate as gas spring.
In first aspect of the present utility model; disclose a kind of Stirling engine of improvement; wherein; reciprocating displacer is attached to installation reciprocating power piston in the housing or is attached to other displacer drive with driving; its improvements are to comprise spring; this spring is attached to the point between described displacer and displacer drive link mechanism to be protected; and this spring is lax in the basic neutral position of described displacer; to apply centering power to described displacer, thus reduce the load in described displacer drive link mechanism.
In second aspect of the present utility model, one end of described spring is attached to described displacer, and the other end of described spring is attached to described power piston.
In the third aspect of the present utility model, one end of described spring is attached to described displacer, and the other end of described spring is attached to described housing.
In fourth aspect of the present utility model, described spring is gas spring.
In the of the present utility model 5th, this Stirling engine also comprises: the first safety check, and this first safety check is connected between described gas spring and ambient atmosphere with mode of communicating, flows into described gas spring to allow gas; And second safety check, this second safety check is connected between the internal gas space of described gas spring and described Stirling engine with mode of communicating, flow into described Stirling engine to allow gas.
In the of the present utility model 6th, this Stirling engine also comprises the device for blocking the gas flow through described second safety check.
In the of the present utility model 7th, the Israel and Palestine that the pressure ratio of described gas spring equals described Stirling engine are the expectation average operating pressure of unit.
In eighth aspect of the present utility model, the quality of described displacer and linkage mechanism thereof and the spring constant of described spring are selected to and resonate.
In the of the present utility model 9th, described displacer has the connecting rod extending axially through described power piston, and described spring comprises gas spring, a part in two parts that can be movable relatively of this gas spring is mounted to described connecting rod, and another part in described two parts that can be movable relatively to be arranged in described housing and spaced apart with described power piston.
In the of the present utility model tenth, disclose a kind of Stirling engine of improvement, wherein, reciprocating displacer is attached to installation reciprocating power piston in the housing or is attached to some other displacer drive with driving, wherein displacer drive link mechanism comprises the connecting rod extending centrally through described power piston, its improvements are to comprise pump, this pump has the piston component and cylinder member installed coaxially with described connecting rod, one in described piston component and described cylinder member is connected to described connecting rod, and the another one in described piston component and described cylinder member is connected to described housing, described pump comprises safety check and path, this path is communicated with the internal gas space of ambient atmosphere and described housing, with by gas pump in described internal gas space.
In the of the present utility model 11, this Stirling engine also comprises the device for blocking the gas flow through the second safety check.
In the of the present utility model 12, the Israel and Palestine that the pressure ratio of described pump equals described Stirling engine are the expectation average operating pressure of unit.
Accompanying drawing explanation
Fig. 1 is the axial sectional view implementing crank type Stirling engine of the present utility model.
Fig. 2 is substantially along the axial sectional view through the planar interception in 90 ° relative to the section plane of Fig. 1 of the line 2-2 of Fig. 1.
Fig. 3 is the axial sectional view substantially intercepted in the plane identical with Fig. 1, but removes piston actuated linkage mechanism, and piston and gas spring are in section to disclose the internal mechanism of the mode of execution of Fig. 1.
Fig. 4 is the axial sectional view essentially across the section identical with Fig. 2, but shows the inside of gas spring pumping mechanism.
Fig. 5 is the gas spring of the mode of execution shown in Fig. 1 and the detailed view of power piston section.
Fig. 6 shows the axial sectional view of alternative embodiment of the present utility model, and this mode of execution make use of the mechanical spring be connected between displacer and piston.
When describing the preferred implementation of the present utility model shown in accompanying drawing, for the sake of clarity concrete term will be taked.But, be not to the utility model is limited to the particular term selected like this, and it should be understood that each particular term comprises all technically equivalent ones having operated similar object in a similar manner.
Embodiment
Preferred implementation of the present utility model shown in Fig. 1 to Fig. 5 is crank type or kinematic Stirling engine, and wherein displacer 10 is connected to power piston 14 via the drive link mechanism being expressed as 12 generally and is connected to power stage crankshaft 16.
The combinative movement that the utility model can also be applied to wherein piston is finished the work many pistons (α type) machine of displacement of gas.Thus this piston had not only been used as piston but also had played the function of displacer.
What be attached to crankshaft 16 is traditional counterweight 18, flywheel 20 and crank pin 22.Drive link mechanism from crank pin 22 to displacer comprises connecting rod 24, and one end of this connecting rod 24 is axially fixed to displacer 10, and its opposite end is pivotally connected to a pair connecting link 26,28.These connecting links 26,28 are pivotally connected between one end of connecting rod 24 and bellcrank 30 at their opposite end place.
Bellcrank 30 is mounted to motor body 34 pivotally at pivot pin 32 place.Bellcrank is also connected to crank pin 22 via connecting link 36, and operation is back and forth to drive displacer relative to power piston 14 in appropriate phase.Chain link 37 is pivotally connected to housing 34 at an opposite end 39 place, and the connecting rod chain link 44 that will describe below its opposite end is attached to.
Power piston 14 is attached to crank pin 22 via pair of links chain link 40,42 (these connecting rod chain links 40,42 are attached to another connecting rod chain link 44 pivotally).Connecting rod chain link 40,42 is pivotally connected to piston 14 at a pair protuberance 48,49 place of the bottom side being fixed to piston 14.
The linkage mechanism be shown as power piston, displacer and power stage crankshaft being linked together is the linkage mechanism of a type, and the utility model expection uses the open or linkage mechanism of any other prior art disclosed for this reason in the future.
Improvement as mode of execution of the present utility model has gas spring piston 50, and this gas spring piston 50 discloses in figs. 3 and 4 and is fixed to displacer connecting rod 24 therewith to move.This gas spring piston 50 slides hermetically in cylinder body 52, and this cylinder body 52 is axially arranged in housing 34 on spider or web 53.This spider or web 53 have the radial supporting structure extended, and cylinder body 52 is remained on its axial position by this supporting structure, but still allow working gas to pass through at its opposite side, and have the clearance space for connecting rod 40,42.
In cylinder body 52, reciprocating gas spring piston 50 defines the gas spring be connected between displacer 10 and housing 34.Certainly, have gas spring or these two components of pump structure, and their connection can exchange, thus piston can be fixed relative to housing, and cylinder body can be fixed relative to displacer.Will clearly to those skilled in the art, other gas springs, such as bellows mechanism, can replace illustrated spring.In addition, as the replacement of the gas spring in mode of execution of the present utility model, mechanical spring can also be used.
The form of spring no matter how, and it is all arranged to substantially be relaxed in the neutral position of displacer, thus it applies centering power in fact on displacer, to reduce the load in displacer drive link mechanism.Therefore, when displacer alternately slows down and slows down its reverse stroke process from intermediate position, the power being applied to this displacer in order to realize this acceleration or deceleration is applied by spring at least in part.These loads are passed to housing via spring instead of displacer drive link mechanism.
If spring is the simple gases layout of spring not having additional channel shown in Fig. 3 and Fig. 4, then gas will leak into the inside of gas spring, thus cause the middle pressure in gas spring to be approximately equal to middle pressure in Stirling engine, make its slack position be positioned at the middle position of gas spring, and therefore will apply suitable centering force vector.If this leakage is not enough, then traditional centering mouth can be utilized to guarantee correct middle pressure.
Although preferably displacer is attached directly to motor body by spring, the power being applied to displacer by spring can be attached to housing indirectly by utilizing mechanical spring that this spring is attached directly to power piston as shown in Figure 6.In figure 6, piston 60 is attached to displacer 62 via intermediate mechanical spring 64, and this intermediate mechanical spring 64 is designed to relax in the basic neutral position of displacer relative to piston 60.
All springs all have the relative engineering parameter being called as spring constant, and the linear displacement of the power that this project parameter applies spring and spring connects.In mode of execution of the present utility model, this spring constant can be sufficiently little, thus realize the slight reduction of the load of displacer drive link mechanism.But, some design in, spring constant can along be applied to linkage mechanism power corresponding minimizing and increase.Certainly, the mass block and spring constant that are attached to displacer can also be designed, to provide resonance.By resonator system, the load of displacer drive link mechanism can reduce to minimum in theory.Certainly, linkage mechanism will work on to guarantee that displacer is positioned at correct phase and can not departs from from its phase relationship.
Because desirably arrange and be used for by motor from being pumped into the device of operation pressure, as mentioned above, gas spring described above provides and utilizes minimum additional structure to complete chance from pumping operation.Specifically, increase suitable safety check and passage and allow gas spring to operate as pump in start-up conditions, then operate as gas spring in the above described manner.
Therefore, with reference to Fig. 5, gas spring is provided with inlet channel 70, and this inlet channel 70 is connected between the inside 72 of gas spring and ambient atmosphere with mode of communicating.Inlet channel is provided with traditional safety check 74, and this safety check 74 allows gas from ambient atmosphere inflow gas spring, but stops the flowing on opposite direction.Similarly, passage 76 is set to the gas space of motor from the inside 72 of gas spring.This passage 76 is also provided with safety check, the ball check valve with spheroid 78 as shown in the figure, thus gas can flow in the gas space from the inside 72 of gas spring.
If pump discharge path 76 is only provided with simple safety check, then Stirling engine can be started operation by heating, and initial gas will be utilized at atmosheric pressure to fill operate, to start the to-and-fro motion work of piston 50, thus it is made to be delivered in the gas space of motor by air pump.This will proceed, until the intermediary operation pressure in units of bars absolute in Stirling engine equals the pressure ratio of the pump formed by gas spring.Such as, if piston 50 has, and the internal capacity of gas spring is reduced about 3.6
14the displacement of factor, then atmospheric air will be pumped in Stirling engine, until its absolute pressure is approximately 6 bar.
After reaching pressure maximum, thus gas spring will operate between the maximum absolute pressure and the minimum absolute pressure (i.e. atmospheric pressure) of 1 bar of 6 bar.Thus, thus spring will operate as gas spring with favorable characteristics described above under the absolute average gas pressure of 3.5 bar.
In addition, can arrange control valve unit, like this, the gas passageway through pump discharge passage 76 can block by this control valve unit completely.Although any one in any known fluid valve can be used, but the rotatable bar 80 of simple structure is preferably set, this bar 80 be fixed to can manual rotation knob 82 and be threaded in the radial hole 84 of spider arm 52, this bar can be seated on spheroid 78.The rotation of bar 80 makes this bar axial translation, and this forces spheroid 78 to be resisted against on its seat, thus blocks through the gas passageway on any direction of exit passageway 76.
When passage 76 is completely plugged, gas can not enter in the gas space again, and therefore the inside 72 of gas spring may be increased to more than the average gas pressure of motor in the compression stroke process of motor.By exit passageway 76 is blocked, working gas through piston 50 to the leakage of the inside 72 of gas spring by equal for the average operating pressure of the middle pressure with Stirling engine that finally make gas spring.In the embodiment provided above, this will be 6 bar, and wherein the pressure ratio of gas spring is 6 to 1.Therefore, when passage 76 is blocked, spring operates with the middle pressure of the twice of the middle pressure of its operation when passage 76 is opened.Therefore, there are two optional spring constants, these two spring constants can be selected to operate for spring.Certainly, can connect the valve with continuous variable aperture, to measure the gas flow flowing through passage 76 and to realize middle springs constant, but the stability of the adjustment of this valve may be difficult to maintain.
Although disclose in detail preferred implementations more of the present utility model, should be appreciated that, can adopt when not departing from the scope of spirit of the present utility model or claim subsequently the various amendments that its structure is carried out.
Claims (12)
1. the Stirling engine improved; wherein; reciprocating displacer is attached to installation reciprocating power piston in the housing or is attached to other displacer drive with driving; its improvements are to comprise spring; this spring is attached to the point between described displacer and displacer drive link mechanism to be protected; and this spring is lax in the basic neutral position of described displacer; to apply centering power to described displacer, thus reduce the load in described displacer drive link mechanism.
2. Stirling engine according to claim 1, its improvements are, one end of described spring is attached to described displacer, and the other end of described spring is attached to described power piston.
3. Stirling engine according to claim 1, its improvements are, one end of described spring is attached to described displacer, and the other end of described spring is attached to described housing.
4. Stirling engine according to claim 3, its improvements are, described spring is gas spring.
5. Stirling engine according to claim 4, its improvements are, this Stirling engine also comprises: the first safety check, and this first safety check is connected between described gas spring and ambient atmosphere with mode of communicating, flows into described gas spring to allow gas; And second safety check, this second safety check is connected between the internal gas space of described gas spring and described Stirling engine with mode of communicating, flow into described Stirling engine to allow gas.
6. Stirling engine according to claim 5, its improvements are, this Stirling engine also comprises the device for blocking the gas flow through described second safety check.
7. Stirling engine according to claim 5, its improvements are, the Israel and Palestine that the pressure ratio of described gas spring equals described Stirling engine are the expectation average operating pressure of unit.
8. Stirling engine according to claim 1, its improvements are, the quality of described displacer and linkage mechanism thereof and the spring constant of described spring are selected to and resonate.
9. Stirling engine according to claim 1, its improvements are, described displacer has the connecting rod extending axially through described power piston, and described spring comprises gas spring, a part in two parts that can be movable relatively of this gas spring is mounted to described connecting rod, and another part in described two parts that can be movable relatively to be arranged in described housing and spaced apart with described power piston.
10. the Stirling engine improved, wherein, reciprocating displacer is attached to installation reciprocating power piston in the housing or is attached to some other displacer drive with driving, wherein displacer drive link mechanism comprises the connecting rod extending centrally through described power piston, its improvements are to comprise pump, this pump has the piston component and cylinder member installed coaxially with described connecting rod, one in described piston component and described cylinder member is connected to described connecting rod, and the another one in described piston component and described cylinder member is connected to described housing, described pump comprises safety check and path, this path is communicated with the internal gas space of ambient atmosphere and described housing, with by gas pump in described internal gas space.
11. Stirling engines according to claim 10, its improvements are, this Stirling engine also comprises the device for blocking the gas flow through the second safety check.
12. Stirling engines according to claim 10, its improvements are, the Israel and Palestine that the pressure ratio of described pump equals described Stirling engine are the expectation average operating pressure of unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520117157.2U CN204646451U (en) | 2015-02-26 | 2015-02-26 | The Stirling engine improved |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520117157.2U CN204646451U (en) | 2015-02-26 | 2015-02-26 | The Stirling engine improved |
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| Publication Number | Publication Date |
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| CN204646451U true CN204646451U (en) | 2015-09-16 |
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| CN201520117157.2U Expired - Fee Related CN204646451U (en) | 2015-02-26 | 2015-02-26 | The Stirling engine improved |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508078A (en) * | 2016-01-19 | 2016-04-20 | 江苏源之翼电气有限公司 | Efficient hot air engine |
| CN109915279A (en) * | 2019-04-13 | 2019-06-21 | 天津启星动力科技有限公司 | Star-like semi-free piston revolving cylinder engine magnetic linkage combining form |
| CN114616430A (en) * | 2019-07-08 | 2022-06-10 | 冷冻科技有限公司 | Low temperature Stirling cryocooler with mechanically driven expander |
-
2015
- 2015-02-26 CN CN201520117157.2U patent/CN204646451U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105508078A (en) * | 2016-01-19 | 2016-04-20 | 江苏源之翼电气有限公司 | Efficient hot air engine |
| CN105508078B (en) * | 2016-01-19 | 2017-04-12 | 江苏源之翼电气有限公司 | Efficient hot air engine |
| CN109915279A (en) * | 2019-04-13 | 2019-06-21 | 天津启星动力科技有限公司 | Star-like semi-free piston revolving cylinder engine magnetic linkage combining form |
| CN114616430A (en) * | 2019-07-08 | 2022-06-10 | 冷冻科技有限公司 | Low temperature Stirling cryocooler with mechanically driven expander |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150916 Termination date: 20170226 |
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| CF01 | Termination of patent right due to non-payment of annual fee |