CN108253652A - A kind of Split type welded hot end heat exchanger of coaxial type pulse pipe refrigerator - Google Patents
A kind of Split type welded hot end heat exchanger of coaxial type pulse pipe refrigerator Download PDFInfo
- Publication number
- CN108253652A CN108253652A CN201810020613.XA CN201810020613A CN108253652A CN 108253652 A CN108253652 A CN 108253652A CN 201810020613 A CN201810020613 A CN 201810020613A CN 108253652 A CN108253652 A CN 108253652A
- Authority
- CN
- China
- Prior art keywords
- split
- seat
- transfer device
- heat transfer
- connecting leg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K1/00—Soldering, e.g. brazing, or unsoldering
- B23K1/0008—Soldering, e.g. brazing, or unsoldering specially adapted for particular articles or work
- B23K1/001—Sealing small holes in metal containers, e.g. tins
-
- 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
- F25B2309/1412—Pulse-tube cycles characterised by heat exchanger details
Abstract
The invention discloses a kind of Split type welded hot end heat exchangers of coaxial type pulse pipe refrigerator, are collectively constituted by cold finger seat, separated heat transfer device, hot junction casing, compressor connecting leg, split vascular seat and inertia tube connecting leg.By being reformed to traditional structure, hot end heat exchanger is designed as two-piece unit form, utilize the mode of vacuum brazing, by each important part integral solder together, the possibility revealed is prevented, increase the heat dissipation performance of heat exchanger entirety, and significantly improve the efficiency and service life of hot end heat exchanger or even entire coaxial type pulse pipe refrigerator, there is very big facilitation for practical application of the co-axial pulse tube refrigerator in special dimensions such as aerospace, practical superconductions.
Description
Technical field
The invention belongs to Refrigeration and Cryogenic Engineering fields, are related to pulse tube refrigerating machine, more particularly to a kind of coaxial type pulse
The Split type welded hot end heat exchanger of control cold.
Background technology
It is different from the relative position of regenerator according to pulse tube, pulse tube refrigerating machine can be divided into three categories：Linear type,
U-shaped and coaxial type.It is the tightest in three kinds of arrangements together with pulse tube is disposed concentrically upon with regenerator in coaxial type arrangement
The one kind gathered can be realized and be coupled with the convenient of cooled device, be adapted to the application scenario for having particular/special requirement to spatial volume.
Particular, it is important that the prolonged application history due to sterlin refrigerator in terms of military and space, the cooled devices of majority and
The suitable and matching used geometry of sterlin refrigerator has all been made in Dewar structure, and coaxial type is pulse tube refrigerating machine three
Larger one kind changed and just can meet this geometric dimension can not be uniquely done in kind arrangement, can directly be used for reference existing
Ripe coupling technique, thus there is great attraction in the application of the special dimensions such as military and space.
Hot end heat exchanger is a critical component in coaxial type pulse pipe refrigerator, as coaxial type pulse pipe refrigerator
Hot junction internal working medium carries out the mediator of heat exchange with external environment, it needs to realize both sides major function：First,
Realize the high efficient heat exchanging under finite size, the high efficient heat exchanging at internal face being particularly in direct contact with Working medium gas；Secondly,
Realize uniform diffusion of the gas working medium in refrigeration machine hot junction.In terms of above-mentioned two, the worker of related field is endeavouring always
In the research of this aspect, and gradually obtain preferable practice effect.But in coaxial type pulse pipe refrigerator gradually from research rank
While section moves towards practical, related application is put into practice but another tightened up requirement is proposed to its hot end heat exchanger,
The reliability and long term life applied, and this problem, are never well solved.
Monoblock type slit hot end heat exchanger is uniform as the high efficient heat exchanging and hot junction working medium that can be solved simultaneously under finite size
The typical case of diffusion, is widely applied very much in coaxial type pulse pipe refrigerator at present.But Integral heat-exchange device is due to it
Design feature, when the pulse tube socket with fixed pulse pipe connects, it is often necessary to be fastened using the additional bolt of nonmetallic O-ring
Mode seals, and hot end heat exchanger can distribute a large amount of heat during long-term work, be in direct contact with heat exchanger non-
Metal O-ring is easy to aging deformation in such hot environment, leads to the leakage of high-pressure gas medium, and nonmetallic old
The problem of gas medium after change inside easy heat exchanging device pollutes, these are potential will largely effect on making for entire refrigeration machine
With the time limit, need periodically to carry out maintenance replacement to nonmetallic O-ring, be just avoided that the leakage of gas medium；And for Gao Chong
Hit the environment of high vibration also can generate damaging influence to nonmetallic O-ring and the fixed mode of bolt.Space and military affairs etc. have
The use of nonmetallic O-ring is often forbidden in the application of long term life requirement, and the scheme of replacement is typically that the metals such as spun gold, filamentary silver are close
Envelope, but one side cost steeply rises, and on the other hand, in essence, the fixed mode of metal sealing additional bolts is still deposited
In larger hidden danger, in HI high impact, high vibration and when used for a long time, which does not still accomplish absolutely reliable.Due to
The characteristics of in structure, the monoblock type slit hot end heat exchanger of coaxial type pulse pipe refrigerator is difficult to take complete sealing welding side
Formula, this has coaxial type pulse pipe refrigerator in space and military affairs etc. on the application band of highly reliable, long life requirement special dimension
Carry out very detrimental effect.
Invention content
In view of the deficiency of prior art, the present invention proposes that a kind of Split type welded hot junction of coaxial type pulse pipe refrigerator is changed
Hot device.
It is an object of the present invention to it is removed from office by the traditional structure of the hot end heat exchanger to coaxial type pulse pipe refrigerator
Newly, hot end heat exchanger is designed as two-piece unit form, using the mode of vacuum brazing, by each important part integral solder one
It rises, prevents the possibility revealed, increase the heat dissipation performance of heat exchanger entirety, and significantly improve hot end heat exchanger or even entirely
The efficiency and service life of coaxial type pulse pipe refrigerator.
The Split type welded hot end heat exchanger suitable for coaxial type pulse pipe refrigerator invented includes cold finger seat 8, divides
Body heat exchanger 9, hot junction casing 10, compressor connecting leg 11, split vascular seat 12 and inertia tube connecting leg 13, which is characterized in that
The soldering packing groove 18 for placing cored solder is machined in split vascular seat upper end outer circle 19 and split vascular seat mounting surface 23；
In soldering packing groove 18 after filling cored solder, hot junction casing 10 is packed into split vascular seat upper end outer circle 19, and completely
It is pressed onto extreme lower position；The centre of split vascular seat 12 is machined with split vascular block hole 21, the upper end of split vascular block hole 21
Split vascular seat tapered opening 20 is machined with, the lower end of split vascular block hole 21 is machined with split vascular seat connecting leg interface 24；
Inertia tube connecting leg 13 is inserted into split vascular seat connecting leg interface 24, fills cored solder between；Install 10 He of hot junction casing
After inertia tube connecting leg 13, filling cored solder, will be mounted with heat in the soldering packing groove 18 on split vascular seat mounting surface 23
The split vascular seat 12 of end cap pipe 10 and inertia tube connecting leg 13 is inserted into separated heat transfer device slit endoporus 26, until split vascular seat
Mounting surface 23 is fully pressed against on separated heat transfer device 9；The lower part of separated heat transfer device 9 is machined with separated heat transfer device lower end inner circle 29, side
Face is machined with separated heat transfer device connecting leg interface 28, and compressor connecting leg 11 is inserted into separated heat transfer device connecting leg interface 28, and the two it
Between place cored solder；There are the separated heat transfer device narrow annular channel 27 being uniformly cut into, separated heat transfer device annular in separated heat transfer device 9
The upper surface of slit 27 is separated heat transfer device cold finger mounting surface 25；Cold finger seat 8 is rest directly upon the installation of separated heat transfer device cold finger
On face 25, and cored solder is added between；It is put after integral installation to carrying out heating in vacuum brazing furnace and is welded as one
Body, so as to collectively constitute a kind of Split type welded hot end heat exchanger suitable for coaxial type pulse pipe refrigerator.
The method have the characteristics that：
1) each part is welded into an entirety using the split type hot end heat exchanger of vacuum brazing, prevents leakage
May, there is the promotion of matter compared to nonmetallic or metal material the O-ring sealing means of easy oxidation leakage, ensure long-term
Sealing improves the service life of heat exchanger；
2) each component contact position is filled using cored solder, the entirety that the formation of split hot end heat exchanger is made to be connected to each other, heat
Amount is directly transmitted by solder bonding metal material, improves the heat dissipation performance of hot end heat exchanger；
3) split type hot end heat exchanger disposably welds completion, is avoided that conventional heat exchanger and pulse tube socket difference pricker
The deleterious situation of secondary pollution caused by when welding, then being fitted together with sealing element and screw, and the use of O-ring is eliminated,
The possibility that gas medium pollutes in heat exchanger is prevented；
4) for the assembly technology of hot end heat exchanger, several big parts are welded into integral mode, phase using vacuum brazing
The step of than in conventional assembly technology, reducing the secondary assembling after vacuum brazing, it is big hot end heat exchanger to be significantly improved
The working efficiency of batch making；
5) separated heat transfer device and split pulse tube socket are welded into the whole leakage detecting process by after simplified weld, compared to normal
The heat exchanging device and pulse tube socket of rule are brazed respectively is then assembled into integrated form, it is possible to reduce necessary leak detection fixture quantity,
Simplify practical leak detection process.
The present invention is comprehensive innovation to conventional coaxial vascular refrigerator hot end heat exchanger structure, for co-axial pulse tube system
Cold has very big facilitation in the practical application of the special dimensions such as aerospace, practical superconduction.
Description of the drawings
Fig. 1 is the exemplary configurations schematic diagram of coaxial pulse-tube refrigerator；
Fig. 2 is the split type hot junction heat exchanger structure schematic diagram for the co-axial pulse tube refrigerator invented；
Fig. 3 is the structure diagram of conventional type coaxial pulse-tube refrigerator hot end heat exchanger；
Fig. 4 is the sectional view of separated heat transfer device 9；
Fig. 5 is the sectional view of split vascular seat 12.
Wherein：1 is compressor；2 be hot end heat exchanger；3 be regenerator；4 be pulse tube；5 be cold head；6 be inertia tube；7
For air reservoir；8 be cold finger seat；9 be separated heat transfer device；10 be hot junction casing；11 be compressor connecting leg；12 be split vascular seat；13
For inertia tube connecting leg；14 be overall heat exchange device；15 be whole vascular seat；16 be fixing screws；17 be sealing ring；18 fill out for soldering
Hopper；19 be split vascular seat upper end outer circle；20 be split vascular seat tapered opening；21 be split vascular block hole；22 is divide
Body vessel seat stage casing outer circle；23 be split vascular seat mounting surface；24 be split vascular seat connecting leg interface；25 is cold for separated heat transfer device
Refer to mounting surface；26 be separated heat transfer device slit endoporus；27 be separated heat transfer device narrow annular channel；28 connect for separated heat transfer device connecting leg
Mouthful；29 be separated heat transfer device lower end inner circle.
Specific embodiment
The specific embodiment of the present invention is described in further detail with reference to the accompanying drawings and embodiments.
The Split type welded hot end heat exchanger suitable for coaxial type pulse pipe refrigerator invented includes cold finger seat 8, divides
Body heat exchanger 9, hot junction casing 10, compressor connecting leg 11, split vascular seat 12 and inertia tube connecting leg 13, which is characterized in that
The soldering packing groove 18 for placing cored solder is machined in split vascular seat upper end outer circle 19 and split vascular seat mounting surface 23；
In soldering packing groove 18 after filling cored solder, hot junction casing 10 is packed into split vascular seat upper end outer circle 19, and completely
It is pressed onto extreme lower position；The centre of split vascular seat 12 is machined with split vascular block hole 21, the upper end of split vascular block hole 21
Split vascular seat tapered opening 20 is machined with, the lower end of split vascular block hole 21 is machined with split vascular seat connecting leg interface 24；
Inertia tube connecting leg 13 is inserted into split vascular seat connecting leg interface 24, fills cored solder between；Install 10 He of hot junction casing
After inertia tube connecting leg 13, filling cored solder, will be mounted with heat in the soldering packing groove 18 on split vascular seat mounting surface 23
The split vascular seat 12 of end cap pipe 10 and inertia tube connecting leg 13 is inserted into separated heat transfer device slit endoporus 26, until split vascular seat
Mounting surface 23 is fully pressed against on separated heat transfer device 9；The lower part of separated heat transfer device 9 is machined with separated heat transfer device lower end inner circle 29, side
Face is machined with separated heat transfer device connecting leg interface 28, and compressor connecting leg 11 is inserted into separated heat transfer device connecting leg interface 28, and the two it
Between place cored solder；There are the separated heat transfer device narrow annular channel 27 being uniformly cut into, separated heat transfer device annular in separated heat transfer device 9
The upper surface of slit 27 is separated heat transfer device cold finger mounting surface 25；Cold finger seat 8 is rest directly upon the installation of separated heat transfer device cold finger
On face 25, and cored solder is added between；It is put after integral installation to carrying out heating in vacuum brazing furnace and is welded as one
Body, so as to collectively constitute a kind of Split type welded hot end heat exchanger suitable for coaxial type pulse pipe refrigerator.
Claims (1)
1. a kind of Split type welded hot end heat exchanger of coaxial type pulse pipe refrigerator, including cold finger seat (8), separated heat transfer device
(9), hot junction casing (10), compressor connecting leg (11), split vascular seat (12) and inertia tube connecting leg (13), it is characterised in that：
The pricker for placing cored solder is machined in split vascular seat upper end outer circle (19) and split vascular seat mounting surface (23)
Weld packing groove (18)；In soldering packing groove (18) after filling cored solder, hot junction casing (10) is packed on split vascular seat
It holds in outer circle (19), and is fully pressed to extreme lower position；The centre of split vascular seat (12) is machined with split vascular block hole (21),
The upper end of split vascular block hole (21) is machined with split vascular seat tapered opening (20), the lower end of split vascular block hole (21)
It is machined with split vascular seat connecting leg interface (24)；Inertia tube connecting leg (13) is inserted into split vascular seat connecting leg interface (24), in the two
Between fill cored solder；After installing hot junction casing (10) and inertia tube connecting leg (13), in split vascular seat mounting surface (23)
On soldering packing groove (18) in filling cored solder, will be mounted with hot junction casing (10 and inertia tube connecting leg (13 split vascular seat
(12 are inserted into separated heat transfer device slit endoporus (26), until split vascular seat mounting surface (23) is fully pressed against separated heat transfer device (9)
On；The lower part of separated heat transfer device (9) is machined with separated heat transfer device lower end inner circle (29), and side is machined with separated heat transfer device connecting leg and connects
Mouth (28), compressor connecting leg (11) is inserted into separated heat transfer device connecting leg interface (28), and places cored solder between；In split
There are the separated heat transfer device narrow annular channel (27) being uniformly cut into, the upper end of separated heat transfer device narrow annular channel (27) in heat exchanger (9)
Face is separated heat transfer device cold finger mounting surface (25)；Cold finger seat (8) is rest directly upon on separated heat transfer device cold finger mounting surface (25),
And cored solder is added between；It is put after integral installation to carrying out heating in vacuum brazing furnace and is welded as a whole, so as to
Collectively constitute a kind of Split type welded hot end heat exchanger of coaxial type pulse pipe refrigerator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810020613.XA CN108253652A (en) | 2018-01-10 | 2018-01-10 | A kind of Split type welded hot end heat exchanger of coaxial type pulse pipe refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810020613.XA CN108253652A (en) | 2018-01-10 | 2018-01-10 | A kind of Split type welded hot end heat exchanger of coaxial type pulse pipe refrigerator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108253652A true CN108253652A (en) | 2018-07-06 |
Family
ID=62726420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810020613.XA Pending CN108253652A (en) | 2018-01-10 | 2018-01-10 | A kind of Split type welded hot end heat exchanger of coaxial type pulse pipe refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108253652A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981722A (en) * | 2020-09-01 | 2020-11-24 | 苏州大学 | Pulse tube refrigerator and assembling method thereof |
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| CN103090578A (en) * | 2013-01-31 | 2013-05-08 | 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 |
| CN103307798A (en) * | 2013-06-21 | 2013-09-18 | 中国科学院上海技术物理研究所 | Coaxial pulse tube refrigerator and infrared device compact coupled structure and manufacturing method |
| CN104034080A (en) * | 2014-01-17 | 2014-09-10 | 中国科学院上海技术物理研究所 | Structure of two coaxial pulse tube cryocoolers by single linear compressor and manufacturing method thereof |
-
2018
- 2018-01-10 CN CN201810020613.XA patent/CN108253652A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100283156B1 (en) * | 1999-02-01 | 2001-02-15 | 구자홍 | Precooler structure for lubricationless pulse tube refrigerator |
| KR20020067295A (en) * | 2001-02-16 | 2002-08-22 | 엘지전자주식회사 | Structure for protecting gas leakage of cryocooler |
| JP2003166766A (en) * | 2001-11-29 | 2003-06-13 | Fuji Electric Co Ltd | Heat exchanger for pulse pipe refrigerator |
| CN102032703A (en) * | 2010-11-26 | 2011-04-27 | 中国科学院上海技术物理研究所 | Integrated hot end phase adjusting structure of inertance-tube type pulse tube cooler and manufacturing method of phase adjusting structure |
| CN102294528A (en) * | 2011-08-12 | 2011-12-28 | 江苏华昌工具制造有限公司 | Process for carrying out entire high-frequency brazing by welding jig |
| CN102410672A (en) * | 2011-10-19 | 2012-04-11 | 广东美的制冷设备有限公司 | Parallel flow heat exchanger and manufacture method thereof |
| CN102735088A (en) * | 2012-06-25 | 2012-10-17 | 中国科学院上海技术物理研究所 | Conical slit-type hot end heat exchanger of coaxial pulse tube refrigerator and manufacturing method |
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| CN103307798A (en) * | 2013-06-21 | 2013-09-18 | 中国科学院上海技术物理研究所 | Coaxial pulse tube refrigerator and infrared device compact coupled structure and manufacturing method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111981722A (en) * | 2020-09-01 | 2020-11-24 | 苏州大学 | Pulse tube refrigerator and assembling method thereof |
| CN111981722B (en) * | 2020-09-01 | 2021-09-07 | 苏州大学 | Pulse tube refrigerator and assembling method thereof |
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Application publication date: 20180706 |
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