CN100585297C - Screw thread welding integral narrow slit type cold junction for coaxial pulse-tube refrigerator - Google Patents
Screw thread welding integral narrow slit type cold junction for coaxial pulse-tube refrigerator Download PDFInfo
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- CN100585297C CN100585297C CN200810039571A CN200810039571A CN100585297C CN 100585297 C CN100585297 C CN 100585297C CN 200810039571 A CN200810039571 A CN 200810039571A CN 200810039571 A CN200810039571 A CN 200810039571A CN 100585297 C CN100585297 C CN 100585297C
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- cold head
- cold
- slit
- head
- boss
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B9/00—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point
- F25B9/14—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle
- F25B9/145—Compression machines, plants or systems, in which the refrigerant is air or other gas of low boiling point characterised by the cycle used, e.g. Stirling cycle pulse-tube cycle
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2309/00—Gas cycle refrigeration machines
- F25B2309/14—Compression machines, plants or systems characterised by the cycle used
- F25B2309/1406—Pulse-tube cycles with pulse tube in co-axial or concentric geometrical arrangements
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention discloses a thread weld integral slit type cold head of the coxial vessle refrigerator in the refrigeration technology field, including an upper cold head, a lower cold head, a cold end baffle and a copper wire, wherein the upper cold head and the lower cold head are welded again after the threaded connection, the cold baffle is arranged at the middle of the cold head integer, and the cold baffle is filled with the copper wire, wherein the lower cold head is divided into a base seat and a boss having the uniformly distributed slots in the axial symmetry. The depth of the slot is the same with the height of the boss, and the external thread is arranged at the cirumferential of the base seat; a cylinder is arranged on the upper cold head, a round hole at the center and radial slots in the distributed uniformly arranged at the cirumferential of the round hole. The width of the slot is consistent with the slot of the lower cold head; the internal thread structure of the upper cold head is matched with the external thread of the lower cold head, with the other end in the thread match with the cold accumulator, and is left with the margin for welding after being matched. The invention has large heat exchange area, and the welding structure ensures the leak detection safety of the pressure gas the welding reliability.
Description
Technical field
The present invention relates to a kind of member of refrigeration machine of refrigeration technology field, specifically is a kind of screw thread welding integral narrow slit type cold junction that is used for coaxial pulse-tube refrigerator.
Background technology
Vascular refrigerator is to utilize high-low pressure gas that the gas process that charges and discharge of vascular cavity is obtained refrigeration.According to the position of regenerator in the vascular refrigerator and vascular, can be divided into coaxial type again, U type and connecting shaft type.On structure, for the vascular refrigerator of the coaxial arrangement of optimizing, they are more with compact conformation, and volume is subjected to paying close attention to widely for a short time.
The structure that people are improving vascular refrigerator always further improves its performance.Gas in the co-axial pulse tube refrigerator produces refrigeration effect at cold junction, and gas in the regenerator enters in the vascular for 180 ° through bending behind the cool end heat exchanger, so the water conservancy diversion of vascular cold junction, heat exchange structure are very big to the performance impact of refrigeration machine.
Find through literature search prior art, Chinese patent CN101067523 " a kind of integrated cold head that is used for co-axial pulse tube refrigerator ", its cold head is made of the cylinder of red copper piece, integrated cold head is a cylinder, there is a flange that is used for the welding of regenerator shell cylinder bottom along periphery, the cylinder center has circular hole, have uniform radial slit around the circular hole, slit depth and circular hole deep equality, on column, have an annular channel that a vascular that is used for refrigeration machine inserts with circular hole is coaxial, the degree of depth of annular channel is less than slit depth, so that regenerator cold junction gas exchanges with gas in the vascular by slit.This cold head has circular hole at the center, and certain depth is arranged, and forms bigger cold head void volume.And as the laminarization element of vascular cold junction, center hole and radiant type narrow slit structure are to the laminarization poor effect of Working medium gas.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of screw thread welding integral narrow slit type cold junction that is used for coaxial pulse-tube refrigerator is proposed, this cold head integrates vascular cold junction gas flow guiding device, regenerator cold junction even gas distribution device, cool end heat exchanger, the present invention unique screw thread welding manner and integral narrow slit type structure, can guarantee welding reliability, improve the security of under gases at high pressure, hunting leak.It is big to select suitable groove number and groove width can make this cold head have a heat exchange area simultaneously, the low cold head void volume and the low pressure loss.
The present invention is achieved by the following technical solutions, cold head integral body of the present invention comprises cold head, following cold head, cold junction baffle plate and red copper silk screen, welding again had the cold junction baffle plate in the middle of the cold head integral body after last cold head and following cold head were threaded, and was filled with the red copper silk screen in the cold junction baffle plate.
Described cold head down is a cylinder, and being divided into two-layer is base and boss, and the equally distributed slit of axial symmetry is arranged on the boss, and slit depth is identical with the height of boss.The base periphery has external screw thread.
Described upward cold head is a cylinder, there is a circular hole at its center, uniform radial slit is arranged around the circular hole, the width length of slit is consistent with the slit on the following cold head, there is counterbore the lower end, the counterbore degree of depth is identical with following cold head boss height, and cooperates with the boss formation of following cold head, and counterbore external diameter circumference is identical with the external diameter circumference of slit.The width of slit is identical with number and following cold head.
The described cold head two ends of going up are female thread structure, cooperate with the described external screw thread of cold head down, the other end can with the regenerator threaded engagement, and all leave surplus for welding after cooperating.
Said structure of the present invention can guarantee welding reliability, has improved the security of hunting leak under gases at high pressure.Selecting suitable slit number and slit simultaneously, wide can to make this cold head have a heat exchange area big, the low cold head void volume and the low pressure loss.
Described cold junction baffle plate is a ring-type cylindrical structure, near following cold head partially filled the red copper silk screen is arranged, and remaining part is the vascular insertion portion, and the gas in the regenerator enters into vascular by the slit and the red copper silk screen of cold head.
Described slit can adopt the mode of fluting to form, and to several equally distributed radial slots of external-open, slot downwards in edge cold head boss upper surface down along last cold head center hole, opens to following cold head base upper surface, and the groove of cold head alignment up and down forms described slit.
Described cold head boss down forms with the counterbore of last cold head lower end and cooperates, and regenerator communicates with the slit that aligns of vascular by cold head formation up and down.
Among the present invention, part is regenerator cold junction even gas distribution device part beyond the cold junction baffle plate, and the cold junction baffle plate is divided into stacked red copper silk screen of vascular cold junction air deflector and vascular dip section with inside, and the red copper silk screen is as the effect of vascular cold junction air deflector.Gas in regenerator and the vascular is by the slit conducting of the upper and lower cold head of welded type.When gas was flowed through slit, the cold that vascular refrigerator produces was transferred to the cold head inner surface by heat convection, is transferred to the cold head outer surface through heat conduction again; Uniform slit plays the effect to even gas distribution and water conservancy diversion in heat exchange simultaneously.
Great advantage of the present invention is:
1. this welded type cold head and working gas heat exchange area are big, and cold can be transferred to the cold head outer surface effectively.Uniform slit is effective to the even gas distribution and the water conservancy diversion of regenerator, utilize stacked red copper silk screen as air deflector at the vascular cold junction, reduce the cold junction void volume, also the gas in the inflow vascular has been played the effect of laminarization simultaneously, reduced the possibility that produces vortex.
2. the vascular refrigerator cold junction partly exists cold head top and regenerator, two pads between last cold head and the following cold head, and all be to be threaded earlier, welded structure guarantees the security of welding reliability and leak detection again.
Description of drawings
Fig. 1 is an embodiment of the invention vertical view;
Wherein only mark following cold head, go up cold head and cold junction baffle plate.
Fig. 2 is the axial cutaway view of the embodiment of the invention;
Wherein cutting plane is through the cutaway view of slit.
Fig. 3 is the axial cutaway view of the embodiment of the invention;
Wherein: cutting plane is without the cutaway view of slit.
Fig. 4 overlooks and axial cutaway view for cold head on the embodiment of the invention;
Wherein: (a) be vertical view, (b), (c) be the cutaway view of cutting plane without slit for the cutaway view of cutting plane through slit.
Fig. 5 looks and vertical view for the master of cold head under the embodiment of the invention;
Wherein: (a) being front view, (b) is vertical view;
Among the figure: go up cold head 1, following cold head 2, cold junction baffle plate 3, red copper silk screen 4, vascular 5, regenerator 6; Groove 201 on counterbore 101, internal thread 102, the boss 202, boss 202 and base 203.
The specific embodiment
Below in conjunction with accompanying drawing embodiments of the invention are elaborated: present embodiment is being to implement under the prerequisite with the technical solution of the present invention, provided detailed embodiment and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
As shown in the figure, the present invention includes cold head 1, following cold head 2, cold junction baffle plate 3 and stacked red copper silk screen 4 four parts constitutes.All there is internal thread at last cold head 1 two ends, and an end is connected the back welding with the external screw thread of following cold head 2, and the other end is connected the back welding with regenerator 6 threaded one ends; Last cold head 1 center has circular hole, has uniform radial slit around the circular hole, and cold junction baffle plate 3 is housed in the circular hole.In screw thread welding integral type cold head of the present invention, part is regenerator cold junction even gas distribution device part beyond the cold junction baffle plate 3, the cold junction baffle plate is divided into stacked red copper silk screen 4 of vascular cold junction air deflector and vascular dip section with inside, and red copper silk screen 4 is as the effect of vascular cold junction air deflector.Gas in regenerator 6 and the vascular 5 is by the slit conducting of cold head under the welded type 2.When gas was flowed through slit, the cold that vascular refrigerator produces was transferred to the cold head inner surface by heat convection, is transferred to the cold head outer surface through heat conduction again; Uniform slit plays the effect to even gas distribution and water conservancy diversion in heat exchange simultaneously.
Figure 1 shows that embodiment of the invention vertical view, shown last cold head 1, following cold head 2 and 3 three parts of cold junction baffle plate among the figure, red copper silk screen 4 does not demonstrate.Last cold head 1 is opened 18 grooves from the center hole outward radial, and groove width is 0.4mm, and the external diameter of groove is identical with the external diameter of regenerator 6 silk screens, and the degree of depth of groove is identical with the height of cold junction baffle plate 3.Following cold head 2 projection sections also have 18 grooves that 0.4mm is wide.The groove of cold head alignment back forms slit up and down.Middle cold junction baffle plate 3 plays to intercept goes up the effect that the gas in cold head 1 gas and the stacked red copper silk screen 4 is scurried mutually, prevents that gas from entering into directly that red copper silk screen 4 goes and the whole heat exchange effect that reduces cold head without the groove of cold head 2 down.
Shown in Fig. 2-3, be the axial cutaway view of the embodiment of the invention.Cold junction baffle plate 3 is a ring-type cylindrical structure, its inwall the first half vascular 5 cold junction outer walls that closely cooperate, and the cold junction air deflector of red copper silk screen 4 as vascular filled in the lower part, and utilizes down that cold head 2 and vascular 5 end faces compress.Red copper silk screen 4 is the circular silk screen of red copper.
Shown in Fig. 2-4, last cold head 1 center has circular hole, and its inwall and cold junction baffle plate 3 outer walls form and closely cooperate.There is a counterbore 101 last cold head 1 lower end, counterbore 101 degree of depth 2mm, and its internal diameter is identical with the external diameter of groove.Last cold head all has internal thread 102 in two ends about in the of 1, welding after the upper end links to each other with regenerator 6, welding after the lower end links to each other with following cold head 2.The internal thread 102 of last cold head 1 and the total length of escape slightly are longer than the reach of regenerator 6 cold junction reaches and following cold head 2, so that reserve the surplus welding.
Cold head of the present invention is made by the high thermal conductivity materials red copper, and cold head integral body is welded by last cold head and following cold head two parts, and cold head all can obtain very high precision by the method for line cutting up and down, can guarantee during welding that the groove of cold head can align up and down.This structure can guarantee welding reliability, has improved the security of hunting leak under gases at high pressure.It is big to select suitable groove number and groove width can make this cold head have a heat exchange area simultaneously, the low cold head void volume and the low pressure loss.
Claims (5)
1, a kind of screw thread welding integral narrow slit type cold junction that is used for coaxial pulse-tube refrigerator, it is characterized in that: comprise cold head, following cold head, cold junction baffle plate and red copper silk screen, welding again after last cold head and following cold head are threaded, the cold junction baffle plate is arranged in the middle of the cold head integral body, be filled with the red copper silk screen in the cold junction baffle plate, wherein:
Described cold head down is divided into base and boss, and the equally distributed slit of axial symmetry is arranged on the boss, and slit depth is identical with the height of boss, and the base periphery has external screw thread;
Described upward cold head is a cylinder, and there is a circular hole at its center, and uniform radial slit is arranged around the circular hole, the width of slit is consistent with the slit on the following cold head, there is counterbore the lower end, and the counterbore degree of depth is identical with following cold head boss height, and cooperates with the boss formation of following cold head;
Described upward cold head two ends are internal thread, and an end cooperates the other end and regenerator threaded engagement with the described external screw thread of cold head down.
2, the screw thread welding integral narrow slit type cold junction that is used for coaxial pulse-tube refrigerator according to claim 1, it is characterized in that, described cold junction baffle plate is a ring-type cylindrical structure, near following cold head partially filled the red copper silk screen is arranged, remaining part is the vascular insertion portion, and the gas in the regenerator enters into vascular by the slit of last cold head and the slit and the red copper silk screen of following cold head.
3, the screw thread welding integral narrow slit type cold junction that is used for coaxial pulse-tube refrigerator according to claim 1 is characterized in that, the described cold head of going up, and the counterbore external diameter circumference on it overlaps with the radial outer end portion of slit on it.
4, according to claim 1 or the 3 described screw thread welding integral narrow slit type cold junctions that are used for coaxial pulse-tube refrigerator, it is characterized in that, the slit of described upward cold head and the slit of following cold head all are groove, along last cold head center hole to several equally distributed radial slots of external-open, slot downwards in edge cold head boss upper surface down, open to following cold head base upper surface, the groove of cold head alignment up and down forms integral narrow slit.
5, the screw thread welding integral narrow slit type cold junction that is used for coaxial pulse-tube refrigerator according to claim 1, it is characterized in that, described cold head boss down forms with the counterbore of last cold head lower end and cooperates, and regenerator communicates with the slit that aligns of vascular by cold head formation up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810039571A CN100585297C (en) | 2008-06-26 | 2008-06-26 | Screw thread welding integral narrow slit type cold junction for coaxial pulse-tube refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810039571A CN100585297C (en) | 2008-06-26 | 2008-06-26 | Screw thread welding integral narrow slit type cold junction for coaxial pulse-tube refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101298948A CN101298948A (en) | 2008-11-05 |
| CN100585297C true CN100585297C (en) | 2010-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810039571A Expired - Fee Related CN100585297C (en) | 2008-06-26 | 2008-06-26 | Screw thread welding integral narrow slit type cold junction for coaxial pulse-tube refrigerator |
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| Country | Link |
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| CN (1) | CN100585297C (en) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052797B (en) * | 2010-11-26 | 2012-06-27 | 中国科学院上海技术物理研究所 | Integrated end cover structure for pushing piston of heat accumulating type refrigerating machine |
| GB201209243D0 (en) * | 2012-05-25 | 2012-07-04 | Oxford Instr Nanotechnology Tools Ltd | Apparatus for reducing vibrations in a pulse tube refrigerator |
| CN103090578B (en) * | 2013-01-31 | 2014-11-26 | 中国科学院上海技术物理研究所 | Coaxial type pulse pipe refrigerator hot end inner diversion structure and manufacturing method thereof |
| CN103759452B (en) * | 2014-01-17 | 2016-01-13 | 中国科学院上海技术物理研究所 | Separate unit linear compressor drives straight line and coaxial pulse-tube coldfinger and manufacture method |
| CN103940137B (en) * | 2014-05-04 | 2016-01-13 | 中国电子科技集团公司第十六研究所 | A kind of cool end heat exchanger for sterlin refrigerator |
| CN104534715A (en) * | 2014-12-09 | 2015-04-22 | 中国科学院上海技术物理研究所 | Low-vibration large-cooling-capacity free piston type Stirling cryocooler expansion machine |
| CN107014099B (en) * | 2016-01-28 | 2019-06-11 | 同济大学 | Using the vascular refrigerator of muti-piece plate heat exchanger |
| CN109237830B (en) * | 2017-09-30 | 2020-12-11 | 北京空间飞行器总体设计部 | Coaxial type pulse tube refrigerator cold end and refrigerator based on cold end |
| CN110195992B (en) * | 2019-05-24 | 2020-11-06 | 西安交通大学 | Slit type cold end heat exchanger for coaxial pulse tube refrigerator |
| CN112240650B (en) * | 2020-09-15 | 2021-11-19 | 中国科学院上海技术物理研究所 | Straight-through slit precooling heat exchanger of precooling type low-temperature throttling refrigerator and manufacturing method |
| CN112378109B (en) * | 2020-11-23 | 2022-04-12 | 苏州大学 | Low-temperature pulse tube refrigerator |
-
2008
- 2008-06-26 CN CN200810039571A patent/CN100585297C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN101298948A (en) | 2008-11-05 |
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Granted publication date: 20100127 Termination date: 20120626 |