CN202832850U - Stirling circulating device - Google Patents
Stirling circulating device Download PDFInfo
- Publication number
- CN202832850U CN202832850U CN201220491276.0U CN201220491276U CN202832850U CN 202832850 U CN202832850 U CN 202832850U CN 201220491276 U CN201220491276 U CN 201220491276U CN 202832850 U CN202832850 U CN 202832850U
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- displacer
- piston
- cylinder
- base portion
- circulation means
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Abstract
The utility model provides a stirling circulating device which is capable of reducing friction in air cylinders. The stirling circulating device is formed in a method that the edge portions (101, 102, 103) of sliding surfaces of a displacer (70) and a piston (20) bend swimmingly towards the direction away from the inner surfaces of the air cylinders (10, 11). When the displacer (70) and the piston (20) are in reciprocating motion in the air cylinders (10, 11), working fluid can swimmingly flow from the bent edge portions (101, 102, 103) to the sliding surfaces. The result is that a working gas layer is formed between the sliding surfaces of the displacer (70) and the piston (20) and the inner surfaces of the air cylinders (10, 11), a gas lubricating function is achieved by the working gas layer, and therefore friction in the air cylinders (10, 11) can be reduced greatly.
Description
Technical field
The utility model relates to the Stirling circulation means that utilizes Stirling to loop generating and cooling etc.
Background technique
At present known have a Stirling circulation means that displacer and piston coaxial is disposed at the structure in the cylinder, and it is practical as generator and refrigerating machine etc.Simultaneously, in this Stirling circulation means, at piston permanent magnet is installed, and clamping this permanent magnet configuration stator and yoke.In the situation that generator, because of temperature difference working gas repeated compression and the expansion that gives from the outside, reciprocating motion of the pistons thus, this kinergety is transformed into electric energy by the electromagnetic action of permanent magnet and stator.On the other hand, in the situation that refrigerating machine, by flow through driving current in the electromagnetic coil of stator, reciprocating motion of the pistons is followed this to-and-fro motion, and working gas repeated compression and expansion produce the temperature difference of low-temp. portion and high-temperature portion thus.
In the Stirling circulation means, during the interior to-and-fro motion of displacer and piston-cylinder, because of both friction generation losses.At present, by the inner face of the outside of displacer and piston or cylinder being implemented the coating of the low frictions such as fluororesin, realize the reduction of the loss that friction brings.But in the energy loss of Stirling circulation means on the whole, the loss that the friction in the cylinder brings accounts for significant proportion, and therefore, further suppressing this friction becomes problem.
Summary of the invention
The utility model is founded in view of such situation, and its purpose is, a kind of Stirling circulation means that can reduce the friction in the cylinder is provided.
Stirling circulation means of the present utility model has: but but be fixed in the piston that the displacer to-and-fro motion ground that cylinder to-and-fro motion ground in the shell inserts an end of described cylinder inserts the other end of described cylinder.At least one party of described displacer and described piston comprises the slide part that possesses the slip surface that slides at the inner face of described cylinder.The edge part of described slip surface is crooked swimmingly to the direction of the inner face that leaves described cylinder.
Preferably, the described slip surface of described slide part forms as circular described displacer or the all-round mode of described piston to surround the cross section.
Preferably, described Stirling circulation means has: towards the expansion chamber of an end of described displacer, the gas flow path that is communicated with towards the pressing chamber of the other end of described displacer, with described expansion chamber and described pressing chamber, be accumulated in the heat exchanger of the heat of the working gas that described gas flow path flows.Described pressing chamber is formed between described displacer and the described piston.
Preferably, at least one party of described displacer and described piston comprises: the base portion that is formed by metal and the described slide part that is formed by resin.
The model utility content
According to the utility model, can provide a kind of Stirling circulation means that can reduce the friction in the cylinder.
Description of drawings
Fig. 1 is the sectional drawing of one of formation example of the Stirling circulation means of expression the utility model mode of execution;
Fig. 2 is the figure of the major component of the displacer of diagram Stirling circulation means shown in Figure 1 and piston;
Fig. 3 is the figure that the displacer of expression Stirling circulation means shown in Figure 1 drives the connecting rod of usefulness.
Symbol description
1 ... shell, 2 ... upper case, 3 ... the intermediate portion shell, 5 ... the cylinder holding part, 6 ... outer plate, 7 ... lower case, 8 ... cap, 10 ... upper cylinder, 11 ... lower cylinder, 12 ... expansion chamber, 13 ... endothermic plate, 14 ... heat exchanger (regenerator), 15 ... radiating fin, 16 ... intercommunicating pore, 17 ... pressing chamber, 18 ... yoke, 20 ... piston, 21 ... base portion, 22 ... breakthrough part, 23,24 ... slide part, 25 ... magnet, 30 ... stator, 33 ... coil, 36 ... unshakable in one's determination, 40 ... support, 41 ... pillar, 43 ... the supporting base station, 51,52 ... spring members, 61,62 ... connecting rod, 70 ... displacer, 71 ... base portion, 72 ... slide part, 73 ... head.
Embodiment
Below, as the Stirling circulation means of the utility model mode of execution, describe as an example of the Stirling circulation means that is applicable to generator example.
Fig. 1 is the sectional drawing of one of formation example of the Stirling circulation means of expression the utility model mode of execution.In addition, Fig. 2 is the figure of the major component of the displacer of diagram Stirling circulation means shown in Figure 1 and piston.
Stirling circulation means shown in Figure 1 has shell 1, be contained in upper cylinder 10 and lower cylinder 11 in the shell 1, can reciprocally insert upper cylinder 10 displacer 70, can reciprocally insert the piston 20 of lower cylinder 11, with stator 30 and the yoke 18 of the inboard of piston 20 and the configuration of outside subtend, be installed on the magnet 25 of the wall cylindraceous section of piston 20, to the spring members (elastic member) 51 of displacer 70 application of forces, to the spring members (elastic member) 52 of piston 20 application of forces.
At this, shell 1 is one of shell of the present utility model example, and upper cylinder 10 and lower cylinder 11 are one of cylinder of the present utility model example, and displacer 70 is one of displacer of the present utility model example.
Shell 1 is the seal container of having enclosed the working gas (helium etc.) of Stirling circulation means.In the example of Fig. 1, shell 1 combination upper case 2, intermediate portion shell 3, cylinder holding part 5, lower case 7 and form.
The space that is formed between the top and shell 1 of displacer 70 is expansion chamber 12, at this, and working gas heating and its volume increases.On the other hand, the space that is formed between displacer 70 and the piston 20 is pressing chamber 17, and at this, working gas is cooled and volume reduces.
The space cylindraceous that is surrounded by the inwall of the outer wall of upper cylinder 10 and shell 1 is the stream (gas flow path) of working gas that expansion chamber 12 and pressing chamber 17 are communicated with.Between upper cylinder 10 and lower cylinder 11, be provided with the intercommunicating pore 16 that is communicated with pressing chamber 17.Passing this intercommunicating pore 16 and above-mentioned cylindric space (gas flow path) is communicated with expansion chamber 12 and pressing chamber 17.
At above-mentioned space cylindraceous (gas flow path) configuration endothermic plate 13, heat exchanger (regenerator) 14 and radiating fin 15.Endothermic plate 13 is configured in the position near the expansion chamber 12 of upside, and radiating fin 15 is configured in the position near the pressing chamber 17 of downside, and heat exchanger 14 is disposed between endothermic plate 13 and the radiating fin 15.Heat exchanger 14 has and obtains the heat that flows to the working gas of pressing chamber 17 from expansion chamber 12 and carry out accumulation of heat, this accumulation of heat is given the function that flows to the working gas of expansion chamber 12 from pressing chamber 17.
Shell 1 possesses outer plate 6 in the part of joining with radiating fin 15.Outer plate 6 is to go out to the sink of the outside of shell 1 for the hot type with working gas.In the example of Fig. 1, outer plate 6 is fixed between intermediate portion shell 3 and the cylinder holding part 5.Outer plate 6 is cooled off by the cooling media (water etc.) of the not shown supplies such as pump, keeps the temperature of regulation.
On the other hand, upper case 2 be heat transmission that the thermal source from the outside is given to the heat sink of the working gas of expansion chamber 12, the inwall butt of endothermic plate 13 and upper case 2.
Displacer 70 comprises, the head 73 that arranges towards an end of expansion chamber 12, the base portion 71 that arranges towards the other end of pressing chamber 17, the slide part 72, the cylindrical body 74 that slide at the inner face of upper cylinder 10.
The mode that slide part 72 slides with the inner face in upper cylinder 10 is located at the outside of base portion 71, has the encirclement cross section and is the slip surface of the all-round ring-type of circular base portion 71.Slide part 72 forms such as the resin by the low frictions such as polyphenylene sulfide and heat resistance, excellent in wear resistance.
This slide part 72 and base portion 71 are integrally formed by embedding shaping.Particularly, the base portion 71 that for example will make is in advance inserted the mould of regulation, flows into resin and makes its curing to this mould, thus integrally formed base portion 71 and slide part 72.Shown in the enlarged view in the left side of Fig. 2, base portion 71 has for the fixing groove 75 of slide part 72.The width of the Width opening portion of the bottom of groove 75 is wide.Solidify with the state of filling in this groove 75 if form the resin of slide part 72, then the resin of the inside of groove 75 can not deviate from from the opening portion of groove 75.Thus, base portion 71 and slide part 72 are engaged securely.
By embedding to be shaped base portion 71 and slide part 72 are formed one, do not need for the mechanism element with their combinations thus, and also do not need assembling operation.Thus, need not consider the degree of difficulty of assembling operation etc., can make slide part 72 thin as much as possible, therefore, the use amount of the resin that the amount of deformation that the torrid zone can be come is many is limited to irreducible minimum.
In addition, shown in the enlarged view in left side among Fig. 2, the edge part 101 of the slip surface of slide part 72 is crooked swimmingly to the direction that the inner face from upper cylinder 10 leaves.When displacer 70 up and down reciprocatingly moved in upper cylinder 10, working fluid easily flowed swimmingly from this crooked edge part 101 along slip surface, formed the layer of working gas in the gap of the inner face of the slip surface of slide part 72 and upper cylinder 10.The layer of this working gas is by the function of performance gas lubrication, thereby the inner face of the slip surface of slide part 72 and upper cylinder 10 is difficult to directly contact, so the friction in the upper cylinder 10 significantly reduces.
At the end wall of pressing chamber 17 sides of base portion 71, with base portion 71 coaxial fixing cylindrical bodys 74 than base portion 71 paths.In the example of Fig. 1, at the conglobate recess of central part shape of the end wall of base portion 71, and the upper end of cylindrical body 74 inserted this recess.
Displacer 70 is connected with spring members 51 via the connecting rod 61 that the axle direction with cylinder (10,11) extends abreast.One end of connecting rod 61 is connected with base portion 71 by the cavity of the cylindrical body 74 of displacer 70.The other end of connecting rod 61 is connected with the tabular spring members 51 of installing at the supporting base station 43 of lower case 7.Displacer 70 elastic force by the spring members 51 that connects via connecting rod 61 is by in above-below direction (axle direction of the cylinder) application of force.
Fig. 3 is the figure of the connecting rod 61 of expression Stirling circulation means shown in Figure 1.As shown in the drawing, the diameter of connecting rod 61 is 65,66 relatively thick (D2, D3) in the end, at central part 64 thinner (D1).The diameter of central part 64 is certain (D1), and end 65,66 diameter are along with near end and gradually chap of diameter group D1.With regard to the thinner diameter D1 of central part 64, be set in the process of the reciprocating action of displacer 70, central part 64 is by the value of the degree of the elastic force elastically deformable of spring members 51.
Because connecting rod 61 can produce resiliently deformable, thereby even there are some deviations in the central shaft of the central shaft of displacer 70 and upper cylinder 10, connecting rod 61 is at central part 64 also flexibly deflection, and displacer 70 easily moves back and forth swimmingly upper cylinder 10 is interior.That is, suppress the increase of the friction that displacer 70 and a part of strong contact of upper cylinder 10 bring.
Piston 20 has: base portion 21 and the slide part 23 and 24 of being located at the outside of base portion 21 with drum.One end of base portion 21 seals by end wall.
Base portion 21 is one of base portion of the present utility model example, and slide part 23,24 is one of slide part of the present utility model example.
Towards displacer 70, its end wall consists of the wall of zoning pressing chamber 17 to base portion 21 in an end wall of sealing.Base portion 21 keeps slide part 23,24 such as being formed by metals such as aluminium or brass.Because base portion 21 is formed by metal, thereby compare the situation that is formed base portion 21 by resin etc., the amount of deformation of the part that temperature is brought reduces, so the reduction of the mechanical precision under the high temperature is suppressed.
This slide part 23,24 identical with base portion 71 and the slide part 72 of before explanation with base portion 21 forms one by embedding.In addition, shown in the enlarged view in left side among Fig. 2, base portion 21 has for fixing slide part 23,24 groove 27,28.Groove 27,28 is because the width of the Width opening portion of bottom is wide, so if forming slide part 23,24 resin solidifies under this groove 27,27 state in filling, then the resin of the inside of groove 75 can not deviate from from the opening portion of groove 75.Thus, base portion 21 and slide part 23,24 are engaged securely.
Base portion 21 and slide part 23,24 form one by embedding, and thus, the use amount of the resin that the amount of deformation that the torrid zone can be come is many is limited to irreducible minimum.
In addition, shown in the enlarged view in left side among Fig. 2, the direction that the edge part 102 of slide part 23,24 slip surface, 103 leaves to the inner face from lower cylinder 11 is crooked swimmingly.Thus, identical with the situation of above-mentioned slide part 72, owing to form the layer of working gas in the gap of the inner face of slide part 23,24 slip surface and lower cylinder 11, so the frictions in the lower cylinder 11 significantly reduce.
Form the breakthrough part 22 of the cylindrical body 74 that receives displacer 70 in the central authorities towards the end wall of the base portion 21 of displacer 70.In the example of Fig. 1, this breakthrough part 22 is parallel with the axle direction of cylinder (10,11), and is cylindric extension.The cylindrical body 74 of displacer 70 pumps by breakthrough part 22.
A plurality of connecting rods 62 that the base portion 21 of piston 20 extends abreast via the axle direction with cylinder (10,11) are connected with tabular spring members 52.In the example of Fig. 1, spring members 52 is configured between lower cylinder 11 and the spring members 51, is fixed in lower cylinder 11(or supporting base station 43 via not shown pillar) on.Be formed for the through hole of break-through connecting rod 61 at the central part of spring members 52.One end of a plurality of connecting rods 62 be connected in breakthrough part 22 around the position of symmetry, the other end be connected in spring members 52 above-mentioned through hole around the position of symmetry.
The connecting rod 62 of the driving usefulness of piston 20 and the connecting rod 61(Fig. 3 that illustrates before) identical, diameter is thick in the end, and is thin at central part.The central part of connecting rod 62 has certain diameter that can produce the degree of resiliently deformable by spring members 52 in the to-and-fro motion process of piston 20.Because connecting rod 62 can produce resiliently deformable, thereby even there is certain deviation in the central shaft of the central shaft of piston 20 and lower cylinder 11, connecting rod 62 also can be flexibly crooked at central part, and piston 20 is in lower cylinder 11 interior easily swimmingly to-and-fro motion.That is, the increase of the friction that brings of piston 20 and a part of strong contact of lower cylinder 11 is suppressed.
Base portion 21 fixed magnets 25 at piston 20.Magnet 25 between isolated slide part 23,24 to surround the all-round mode ring-type setting of base portion 21 cylindraceous.Towards the fixing yoke 18 of the inner face of the lower cylinder 11 of magnet 25.Yoke 18 is made of magnetic materials such as iron, forms for example ring-type in the mode of surrounding magnet 25.In the inboard of the base portion 21 of piston 20, with the position configuration stator 30 of yoke 18 subtends.Magnet 25 is held between stator 30 and the yoke 18, pumps with piston 20 cylinders.Magnet 25 produces the magnetic field to stator 30 and yoke 18 effects.
Stator 30 has the annular roll electric wire and the iron core 36 of the coil 33 that forms and clamping coil 33 and yoke 18 subtends.
Coil 33 is configured in the inboard of the base portion cylindraceous 21 of piston 20.In addition, coil 33 is with mode and piston 20 arranged coaxial of its circumferential lateral surface to the magnet 25 of piston 20.
Unshakable in one's determination 36 form the cross section shape on every side of surrounding the coil 33 vertical with the coiling direction of electric wire, magnet 25 and coil 33 towards part have gap (not surrounding part, the joint-cutting of coil 33).In the example of Fig. 1,36 two pieces (36A, 36B) that are divided in the above-below direction symmetry unshakable in one's determination.By the overlapping joint of plate (silicon steel plate etc.) with thin magnetic material, form respectively up and down two pieces (36A, 36B).
Unshakable in one's determination 36 by two parallel discoid plate member clampings, and this plate-shaped member is fixed in support 40 by not shown connection piece.Support 40 is fixed on the shell 1 with lower cylinder 11.
At this, the action of Stirling circulation means with above-mentioned formation is described.
When displacer 70 when piston 20 moves downwards, pressing chamber 17 narrows down, therefore, the working gas of pressing chamber 17 flows into the expansion chamber 12 of high temperature by intercommunicating pore 16, radiating fin 15, heat exchanger 14, endothermic plate 13.Flow into the working gas of expansion chamber 12 because of the heat volumetric expansion, so the pressure of expansion chamber 12 and pressing chamber 17 raises.When the pressure ratio of expansion chamber 12 and pressing chamber 17 was high by the pressure in the back pressure space 9 of the lower case 7 of piston 20 zonings, piston 20 was mobile downwards.
Mobile downwards by piston 20, the pressure decreased of expansion chamber 12 and pressing chamber 17, when the pressure than back pressure space 9 hanged down, displacer 70 was moved upward by this pressure difference.
When displacer 70 was moved upward, expansion chamber 12 narrowed down, and therefore, the working gas of expansion chamber 12 flows into the pressing chamber 17 of low temperature by endothermic plate 13, heat exchanger 14, radiating fin 15, intercommunicating pore 16.The working gas that flows into pressing chamber 17 is cooled, smaller volume, therefore, the pressure decreased of expansion chamber 12 and pressing chamber 17.When the pressure decreased of expansion chamber 12 and pressing chamber 17, the movement direction of piston 20 changes upper direction into from lower direction.
When being moved upward by piston 20, the pressure rise of expansion chamber 12 and pressing chamber 17, when the pressure than back pressure space 9 of becoming was high, displacer 70 was mobile downwards by this pressure difference.When displacer 70 when piston 20 moves downwards, working gas flows into expansion chambers 12 from pressing chamber 17 again, the pressure of expansion chamber 12 and pressing chamber 17 uprises, the movement direction of piston 20 changes lower direction into from upper direction.
By above repetition, displacer 70 and piston 20 pump respectively.
When piston 20 to-and-fro motion, magnet 25 moves up and down between yoke 18 and stator 30, and therefore the magnetic field cyclically-varying of coil 33, produces electromotive force, current flowing at coil 33.
As mentioned above, in the Stirling circulation means of present embodiment, with the edge part (101,102,103) of the slip surface of displacer 70 and piston 20 to the direction of the inner face that leaves cylinder (10,11) swimmingly crooked mode form.Thus, when reciprocates inside at cylinder (10,11) of displacer 70 and piston 20, working fluid easily flows towards slip surface swimmingly from the edge part (101,102,103) of bending.Consequently owing between the inner face of the slip surface of displacer 70 and piston 20 and cylinder (10,11), forming the layer of working gas, utilize this gas blanket to realize the gas lubrication function, therefore can significantly reduce the friction of the inside of cylinder (10,11).
In addition, the utility model is not limited only to above-mentioned mode of execution, and comprises other various variations.
In the above-described embodiment, edge part two sides of the slip surface of displacer 70 and piston 20 are and carry out gas lubrication and bending, but in other mode of execution of the present utility model, also only arbitrary edge part is crooked.
In the above-described embodiment, enumerated the example of the generator of Stirling circulation means, but the utility model is not limited to this, such as refrigerating machine that also goes for the Stirling circulation means etc.
In addition, the utility model goes for being output as the Stirling device of 1.2kW, also goes for other all Stirling device.
Claims (4)
1. Stirling circulation means is characterized in that having:
Be fixed in cylinder in the shell,
But the displacer of an end of the described cylinder of to-and-fro motion ground insertion,
But to-and-fro motion ground inserts the piston of the other end of described cylinder,
At least one party of described displacer and described piston comprises the slide part that possesses the slip surface that slides at the inner face of described cylinder,
The edge part of described slip surface is crooked swimmingly to the direction of the inner face that leaves described cylinder.
2. Stirling circulation means as claimed in claim 1 is characterized in that, wherein,
The described slip surface of described slide part forms as circular described displacer or the all-round mode of described piston to surround the cross section.
3. Stirling circulation means as claimed in claim 2 is characterized in that, wherein, has:
Towards the expansion chamber of an end of described displacer,
Towards the pressing chamber of the other end of described displacer,
The gas flow path that described expansion chamber and described pressing chamber are communicated with,
Be accumulated in the heat exchanger of the heat of the mobile working gas of described gas flow path,
Described pressing chamber is formed between described displacer and the described piston.
4. Stirling circulation means as claimed in claim 2 or claim 3 is characterized in that, wherein,
At least one party of described displacer and described piston comprises:
The base portion that is formed by metal and
The described slide part that is formed by resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220491276.0U CN202832850U (en) | 2012-09-25 | 2012-09-25 | Stirling circulating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220491276.0U CN202832850U (en) | 2012-09-25 | 2012-09-25 | Stirling circulating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202832850U true CN202832850U (en) | 2013-03-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220491276.0U Expired - Lifetime CN202832850U (en) | 2012-09-25 | 2012-09-25 | Stirling circulating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202832850U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841421A (en) * | 2015-01-29 | 2016-08-10 | 住友重机械工业株式会社 | Regenerator and stirling cryocooler |
| CN105841385A (en) * | 2015-01-29 | 2016-08-10 | 住友重机械工业株式会社 | Stirling cryocooler |
| CN109578164A (en) * | 2019-01-07 | 2019-04-05 | 宁波斯睿科技有限公司 | A kind of piston of Stirling-electric hybrid and the Pneumatic floating structure of displacer |
-
2012
- 2012-09-25 CN CN201220491276.0U patent/CN202832850U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105841421A (en) * | 2015-01-29 | 2016-08-10 | 住友重机械工业株式会社 | Regenerator and stirling cryocooler |
| CN105841385A (en) * | 2015-01-29 | 2016-08-10 | 住友重机械工业株式会社 | Stirling cryocooler |
| CN105841385B (en) * | 2015-01-29 | 2018-06-22 | 住友重机械工业株式会社 | Sterlin refrigerator |
| CN109578164A (en) * | 2019-01-07 | 2019-04-05 | 宁波斯睿科技有限公司 | A kind of piston of Stirling-electric hybrid and the Pneumatic floating structure of displacer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130327 |