CN101469930A - Composite temperature-variable refrigeration temperature coupling mechanism of liquid nitrogen refrigerating apparatus - Google Patents
Composite temperature-variable refrigeration temperature coupling mechanism of liquid nitrogen refrigerating apparatus Download PDFInfo
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- CN101469930A CN101469930A CNA2007103046223A CN200710304622A CN101469930A CN 101469930 A CN101469930 A CN 101469930A CN A2007103046223 A CNA2007103046223 A CN A2007103046223A CN 200710304622 A CN200710304622 A CN 200710304622A CN 101469930 A CN101469930 A CN 101469930A
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Abstract
The invention relates to a refrigeration temperature coupling mechanism of refrigerating machine, especially a composite variable temperature refrigeration temperature coupling mechanism of a liquid nitrogen refrigerating apparatus, belonging the space cryogenic technical field, the mechanism comprises a detector Dewar, a flexible composite heat conducting material and a cold junction axial pressing mechanism, wherein, the detector Dewar comprises a fixed spiral compression nut 2, a temperature adjusting clearance composition 7, a detector 9, a detector Dewar exterior barrel 10, an inner core 11 and a vacuum thermal insulation space 12; the cold junction axial pressing mechanism comprises a kinetic pressing threaded sleeve 1, a guide positioning ring 3, a cold-storage tube 4, a liquid nitrogen 5 and a cold junction 6; the flexible composite heat conducting material comprises more than two kinds of metal sponge and non-metal sponge compositions; because of using the adjustable axial cold-storage tube and the cold junction pressing mechanism, the axial displacement amount of the cold junction is increased, the transmission path of the cold amount is reduced. The vacuum degree better than 1x10<-2>Pa can enable the clearance gas molecule heat leakage to be mw magnitude, the temperature loss caused by the residual gas molecule heat conduction can be avoided, the refrigeration efficiency can be improved, the lower refrigeration temperature and larger refrigerating amount can be obtained.
Description
Technical field
The present invention relates to a kind of cryogenic temperature coupling mechanism of refrigeration machine, particularly a kind of composite temperature-variable refrigeration temperature coupling mechanism of liquid nitrogen refrigerating apparatus; Belong to cryogenic technique field, space.
Background technology
Liquid nitrogen refrigerating apparatus and request detector coupling mechanism physical dimension is little, efficiency of transmission is high and cryogenic temperature can be regulated, the key that reaches this target is in limited space, adopt axial pressing force to change or maintenance flexible composite heat conducting material layer equivalency degree, reach the Best Coupling of different cryogenic temperature points.Adopting single sponge Heat Conduction Material structure to be difficult to reach the above refrigeration purpose of 140K, is to reach the above cryogenic temperature of 140K and adopt single nonmetal continuous Heat Conduction Material, but temperature fall time needs more than the 5h increase of liquid nitrogen loss amount.Reduce the effective time, be not suitable for being used on the refrigerating plant of multichannel output, different cryogenic temperatures, as liquid nitrogen refrigerating apparatus, miniature throttling refrigerator and solid refrigerator.
Summary of the invention
But the purpose of this invention is to provide a kind of power consumption simple in structure, no, little, in light weight, the multichannel alternating temperature cryogenic temperature coupling mechanism of volume.
Technical solution of the present invention is: but the liquid nitrogen refrigerating apparatus compound alternating temperature cryogenic temperature of multichannel coupling mechanism, and it mainly is made of detector Dewar, flexible composite heat conducting material and cold head axial compression mechanism 3 parts.
Cold head axial compression mechanism is as shown in Figure 1: be made up of the tight swivel nut of dynamic pressure (1), guide-localization circle 3, cold accumulator (4), liquid nitrogen (5), cold head (6) successively.
The detector Dewar is as shown in Figure 2: by decide spiral clamp nut 2, the temperature adjustment gap is formed (7), detector 9, the outer bucket 10 of detector Dewar, inner core 11 and vacuum insulation space 12 and is formed.
Flexible composite heat conducting material 8 is to be composited by sponge more than 2 kinds and nonmetal silk floss.
Liquid nitrogen (5) flows in cold accumulator (4), moves cold head (6) and flexible composite heat conducting material (8) compresses with the tight swivel nut of dynamic pressure (1) along axis direction, and liquid nitrogen (5) is located to absorb heat and produced the gas-liquid two-phase flow phase transformation at cold head (6).
The outer bucket 10 of detector Dewar is supporting bodies of whole composite temperature-variable refrigeration temperature coupling mechanism of liquid nitrogen refrigerating apparatus, inner core 11 sealing and fixing that detector is installed are the detector Dewar outside on barrels 10, form vacuum insulation space 12, wherein the right-hand member inwall of inner core 11 is processed as internal thread and decides spiral clamp nut 2, inner core 11 left ends are put into flexible composite heat conducting material (8), by the tight swivel nut of dynamic pressure (1), guide-localization circle 3, cold accumulator (4), the cold head axial compression mechanism that cold head (6) is formed inserts the inner core of detector Dewar 10, form an integral body that makes it to become as shown in Figure 3 by the threaded engagement of deciding the tight swivel nut of spiral clamp nut 2 and dynamic pressure (1), just can finish the temperature coupling of cold head and detector behind the feeding liquid nitrogen.Because deciding spiral clamp nut 2 is integral structures with the detector 9 that is cooled, the outer bucket 10 of detector Dewar, inner core 11, vacuum insulation space 12, deciding spiral clamp nut 2 is to be made by one section internal thread, and it is constant finishing the assembling back relative position between them.The tight swivel nut 1 of dynamic pressure constitutes the axially-movable parts with guide-localization circle 2, cold accumulator 4, cold head 6, and wherein the tight swivel nut 1 of dynamic pressure is the stepped construction that is made of an external thread section and manual rotary manipulation section, and wherein the ladder hypomere partly is an external thread section.Epimere partly is manual rotary manipulation section, upper right side adopts orthoscopic annular knurl line to be convenient to carry out manual operation, and a red digital calibration line being arranged every 60 °, is divided into little lattice between the adjacent graduation mark again, promptly every 10 ° of graduation marks, swivel nut inside is same stepped construction.Cold accumulator 4 adopts the plasma welding to form by one section stainless steel tube and one section excessive pipe, form a location ladder thus, leave the above fit clearance of 0.5mm between tight swivel nut 1 of dynamic pressure and the cold accumulator 4, so that the tight swivel nut 1 of dynamic pressure manually rotation carries out adjustment, guide-localization circle 3 is the above gap, location of 1mm with the tight swivel nut of dynamic pressure 1 both sides, work as in the temperature adjustment gap of cold head assembly along continuous straight runs insertion shown in Figure 1 detector Dewar shown in Figure 2 after finishing assembly welding, the maximum displacement of cold head is 8mm.The temperature adjustment gap is the cavity of the long 72mm of Φ 12mm, and the flexible composite heat conducting material of at first different proportionings being made in the course of work 8 is filled between detector 9 and the cold head 6.
The principle of such scheme is:
The bottom relative of at first flexible composite heat conducting material 8 for preparing being put into detector Dewar 10 as shown in Figure 3 with detector 9, cold head axial compression mechanism inserts detector Dewar inner core 11, when cold head 6 contacts with the flexible composite heat conducting material 8 that is in free state, the tight swivel nut 2 of the dynamic pressure that begins to turn clockwise enters the level pressure jack panel, because level pressure jack panel 2 is integrative-structures with detector Dewar 10, its relative position is fixed, progressively rotate the tight swivel nut 2 of dynamic pressure and promote centring ring 3, cold head 4 horizontal movement vertically, the layer equivalency degree of flexible composite heat conducting material 8 is changed, the layer equivalency degree is more little, then the temperature difference between cold head and the detector is just more little, be that thrust is big more, the layer equivalency degree is more little; Utilize tight swivel nut 2 graduation marks of dynamic pressure to change thrust and flexible composite heat conducting material 8 proportionings, but just can realize the coupling of alternating temperature cryogenic temperature.
Technical characterstic of the present invention is: the present invention has increased the axial displacement of cold head owing to adopt adjustable axial cold accumulator, cold head hold-down mechanism, has reduced the transmission path of cold.Be better than 1 * 10
-2It only is the milliwatt magnitude that the vacuum of Pa makes the gap gas molecule leak heat, and the temperature loss of avoiding residual gas molecule heat conduction to cause improves refrigerating efficiency, can obtain lower cryogenic temperature and bigger refrigerating capacity.By changing the proportioning of flexible composite heat conducting material, 97K to 150K multiple spot cryogenic temperature can be set, realize that the temperature fall time of 145K cryogenic temperature point shortens one times than the single nonmetal Heat Conduction Material of employing, and have good uniformity.Adopt this temperature coupling mechanism, have that volume is little, temperature stability good, no power consumption.By evidence, the present invention can satisfy the coupling requirement of liquid nitrogen refrigerating apparatus for different cryogenic temperatures.
Description of drawings
Fig. 1 is a cryogenic temperature coupling mechanism cold head components of the present invention, comprises the tight swivel nut 1 of axial hydrodynamic, guide-localization circle 3, cold accumulator 4 and cold head 6 integral structure figure.
Fig. 2 is a cryogenic temperature coupling heat-conductive assembly part of the present invention, comprises axial level pressure jack panel 2, temperature adjustment gap 7, flexible composite heat conducting material 8, Infrared Detectors 9 and detector Dewar 10 structure charts.
The specific embodiment
As shown in Figure 1, but be the compound alternating temperature cryogenic temperature of multichannel of the present invention coupling mechanism cold head assembly, the tight swivel nut 1 of dynamic pressure, guide-localization circle 3, cold accumulator 4, cold head 6 are formed, wherein guide-localization circle 3, cold accumulator 4, cold head 6 adopt being integral of argon arc welding, the tight swivel nut 1 of dynamic pressure is assemblied on the cold accumulator 4 of guide-localization circle 3 back, forms hold-down mechanism with guiding level pressure jack panel 2.The tight swivel nut 1 of the dynamic pressure that turns clockwise makes cold head 6 compress flexible composite heat conducting material 8 as horizontal rectilinear motion, changes the thrust of cold head to flexible composite heat conducting material 8 with different turning moments, controls thrust with the graduation mark on the tight swivel nut of dynamic pressure.
As shown in Figure 2, the relative position of cold head insertion predetermination clamp nut and flexible composite heat conducting material, detector remains unchanged, when turning clockwise the tight swivel nut of dynamic pressure, swivel nut is in a spiral manner to left dislocation, by centring ring thrust is delivered on the cold head, when the thrust on the cold head acted on flexible composite heat conducting material, the layer equivalency degree of flexible composite heat conducting material will change, thereby produced different cryogenic temperatures and refrigerating capacity.
As shown in Figure 3, but assembling and motion state for compound alternating temperature cryogenic temperature coupling mechanism of the present invention, when cold head when center line compresses flexible composite heat conducting material as horizontal rectilinear motion vertically, be subjected to the effect of thrust, flexible composite heat conducting material layer equivalency degree reduces or increases, thereby produces different cryogenic temperatures and refrigerating capacity.
Embodiment:
Adopt the tight swivel nut 1 of dynamic pressure, decide spiral clamp nut 2 and location composite construction, cold accumulator 3, cold head 4 are pushed to the hot junction by temperature adjustment gap (7) vertically, finish heat exchange by the solid conductive heat of Heat Conduction Material.Because decide spiral clamp nut 2 is integral structures with the detector 9 that is cooled, detector Dewar 10, decide spiral clamp nut 2 is to be made by the internal thread of one section long 6mm of M12, and as shown in Figure 2, it is constant finishing the relative position that assembles afterwards between their threes.The tight swivel nut 1 of dynamic pressure constitutes the axially-movable parts with guide-localization circle 2, cold accumulator 4, cold head 6, wherein the tight swivel nut 1 of dynamic pressure is that wherein the ladder hypomere partly is the external thread section of M12 * 0.75mm, length 10mm by the external thread section of a long 10mm of M12 * 0.75mm and the stepped construction of manual rotary manipulation section formation.Epimere partly is the manual rotary manipulation section of the long 27mm of Φ 16mm, right-hand member 10mm adopts orthoscopic annular knurl line to be convenient to carry out manual operation, and a red digital calibration line is being arranged every 60 °, be respectively 0,1,2,3,4,5, be divided into 6 little lattice again between every adjacent graduation mark, promptly every 10 ° of graduation marks, swivel nut inside is same stepped construction.Cold accumulator 4 adopts the plasma welding to form by the thin-wall stainless steel of a segment length 80mm and the excessive pipe of one section long 40mm of Φ 12 * 1mm, form a location ladder thus, leave the fit clearance of 0.5mm between tight swivel nut 1 of dynamic pressure and the cold accumulator 4, so that the tight swivel nut 1 of dynamic pressure manually rotation carries out adjustment, the gap, location that guide-localization circle 3 and the tight swivel nut about 1 of dynamic pressure are 1mm, work as in the temperature adjustment gap of cold head assembly along continuous straight runs insertion shown in Figure 1 detector Dewar shown in Figure 2 after finishing assembly welding, the maximum displacement of cold head is 8mm.The temperature adjustment gap is the cavity of the long 72mm of Φ 12mm, and the flexible composite heat conducting material of at first different proportionings being made in the course of work 8 is filled between detector Dewar inner core 11 and the cold head 6.
Claims (1)
1, a kind of composite temperature-variable refrigeration temperature coupling mechanism of liquid nitrogen refrigerating apparatus, comprise detector Dewar, flexible composite heat conducting material and cold head axial compression mechanism, wherein, the detector Dewar comprise decide that spiral clamp nut 2, temperature adjustment gap form 7, detector 9, the outer bucket 10 of detector Dewar, inner core 11 and vacuum insulation space 12; Cold head axial compression mechanism comprises the tight swivel nut 1 of dynamic pressure, guide-localization circle 3, cold accumulator 4, liquid nitrogen 5, cold head 6; Flexible composite heat conducting material comprises that sponge and the nonmetal silk floss more than 2 kinds is compound; It is characterized in that structural relation is:
The outer bucket 10 of detector Dewar is supporting bodies of whole composite temperature-variable refrigeration temperature coupling mechanism of liquid nitrogen refrigerating apparatus, inner core 11 sealing and fixing that detector is installed are the detector Dewar outside on barrels 10, form vacuum insulation space 12, wherein the right-hand member inwall of inner core 11 is processed as internal thread and decides spiral clamp nut 2, inner core 11 left ends are put into flexible composite heat conducting material 8, by the tight swivel nut 1 of dynamic pressure, guide-localization circle 3, cold accumulator 4, the cold head axial compression mechanism that cold head 6 is formed inserts the inner core of detector Dewar 10, form an integral body by the threaded engagement of deciding the tight swivel nut 1 of spiral clamp nut 2 and dynamic pressure, deciding spiral clamp nut 2 is to be made by one section internal thread; The tight swivel nut 1 of dynamic pressure constitutes the axially-movable parts with guide-localization circle 2, cold accumulator 4, cold head 6, and wherein the tight swivel nut 1 of dynamic pressure is the stepped construction that is made of an external thread section and manual rotary manipulation section, and wherein the ladder hypomere partly is an external thread section; Epimere partly is manual rotary manipulation section, upper right side adopts orthoscopic annular knurl line to be convenient to carry out manual operation, and a red digital calibration line being arranged every 60 °, is divided into little lattice between the adjacent graduation mark again, promptly every 10 ° of graduation marks, swivel nut inside is same stepped construction; Cold accumulator 4 adopts the plasma welding to form by one section stainless steel tube and one section excessive pipe, form a location ladder thus, leave the above fit clearance of 0.5mm between tight swivel nut 1 of dynamic pressure and the cold accumulator 4, guide-localization circle 3 is the above gap, location of 1mm with the tight swivel nut of dynamic pressure 1 both sides; The maximum displacement of cold head 6 is 8mm; The temperature adjustment gap is the cavity of the long 72mm of Φ 12mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2007103046223A CN101469930B (en) | 2007-12-28 | 2007-12-28 | Composite temperature-variable refrigeration temperature coupling mechanism of liquid nitrogen refrigerating apparatus |
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| CN2007103046223A CN101469930B (en) | 2007-12-28 | 2007-12-28 | Composite temperature-variable refrigeration temperature coupling mechanism of liquid nitrogen refrigerating apparatus |
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| CN101469930B CN101469930B (en) | 2011-12-07 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196566A (en) * | 2013-03-26 | 2013-07-10 | 中国科学院上海技术物理研究所 | Elastic structure and implement method of low-temperature thermal coupling between split type dewar and refrigerating machine |
| CN105136313A (en) * | 2015-09-22 | 2015-12-09 | 中国科学院上海技术物理研究所 | Liquid nitrogen horizontal refrigeration device for testing infrared detector Dewar assembly and design method thereof |
| CN105987923A (en) * | 2015-01-28 | 2016-10-05 | 中国科学院高能物理研究所 | Low-temperature sample operation bench used for soft X-ray magnetic circular dichroism (MCD) |
| CN108917945A (en) * | 2018-08-21 | 2018-11-30 | 张淼淼 | A kind of quantum communication photon detector |
| CN109358355A (en) * | 2018-10-19 | 2019-02-19 | 嘉善顺源金属制品有限公司 | A kind of device of high purity germanium detector easy to carry |
| CN109654787A (en) * | 2019-01-22 | 2019-04-19 | 合肥锐联传热技术有限公司 | A kind of device of the thermally conductive radial adiabatic of axial elasticity low temperature |
| CN112665293A (en) * | 2020-12-23 | 2021-04-16 | 西安应用光学研究所 | Cabin-penetrating heat-insulating pressing mechanism applied to ultrahigh vacuum low-temperature refrigerating system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3896658A (en) * | 1973-10-29 | 1975-07-29 | Us Commerce | Controlled low-temperature cooling apparatus |
| CN2052516U (en) * | 1989-07-13 | 1990-02-07 | 何曙安 | Dewar flask of change temp. using liquid nitrogen |
| CN1123748C (en) * | 2000-12-07 | 2003-10-08 | 上海交通大学 | Low-loss low-temp enclosure with liquefied nitrogen |
| CN201196519Y (en) * | 2007-12-28 | 2009-02-18 | 中国航天科技集团公司第五研究院第五一〇研究所 | Composite temperature-variable refrigeration temperature coupling mechanism of liquid nitrogen refrigerating apparatus |
-
2007
- 2007-12-28 CN CN2007103046223A patent/CN101469930B/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103196566A (en) * | 2013-03-26 | 2013-07-10 | 中国科学院上海技术物理研究所 | Elastic structure and implement method of low-temperature thermal coupling between split type dewar and refrigerating machine |
| CN105987923A (en) * | 2015-01-28 | 2016-10-05 | 中国科学院高能物理研究所 | Low-temperature sample operation bench used for soft X-ray magnetic circular dichroism (MCD) |
| CN105987923B (en) * | 2015-01-28 | 2019-03-08 | 中国科学院高能物理研究所 | Low-temperature sample operating bench tray for grenz ray magnetic circular dichroism (mcd) |
| CN105136313A (en) * | 2015-09-22 | 2015-12-09 | 中国科学院上海技术物理研究所 | Liquid nitrogen horizontal refrigeration device for testing infrared detector Dewar assembly and design method thereof |
| CN105136313B (en) * | 2015-09-22 | 2018-08-14 | 中国科学院上海技术物理研究所 | Infrared detector dewar assembly test liquid nitrogen horizontal refrigerating plant and design method |
| CN108917945A (en) * | 2018-08-21 | 2018-11-30 | 张淼淼 | A kind of quantum communication photon detector |
| CN108917945B (en) * | 2018-08-21 | 2019-08-23 | 上海星地通讯工程研究所 | A kind of quantum communication photon detector |
| CN109358355A (en) * | 2018-10-19 | 2019-02-19 | 嘉善顺源金属制品有限公司 | A kind of device of high purity germanium detector easy to carry |
| CN109654787A (en) * | 2019-01-22 | 2019-04-19 | 合肥锐联传热技术有限公司 | A kind of device of the thermally conductive radial adiabatic of axial elasticity low temperature |
| CN109654787B (en) * | 2019-01-22 | 2024-01-30 | 合肥锐联传热技术有限公司 | Axial flexible low-temperature heat conduction radial heat insulation device |
| CN112665293A (en) * | 2020-12-23 | 2021-04-16 | 西安应用光学研究所 | Cabin-penetrating heat-insulating pressing mechanism applied to ultrahigh vacuum low-temperature refrigerating system |
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