CN201331659Y - Satellite-ground compatible dewar adaptable to two refrigeration methods - Google Patents

Satellite-ground compatible dewar adaptable to two refrigeration methods Download PDF

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Publication number
CN201331659Y
CN201331659Y CNU200820182906XU CN200820182906U CN201331659Y CN 201331659 Y CN201331659 Y CN 201331659Y CN U200820182906X U CNU200820182906X U CN U200820182906XU CN 200820182906 U CN200820182906 U CN 200820182906U CN 201331659 Y CN201331659 Y CN 201331659Y
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Prior art keywords
dewar
heat
cold
collar
feed
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Expired - Lifetime
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CNU200820182906XU
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Chinese (zh)
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潘雁频
朱建炳
洪国同
王小军
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510 Research Institute of 5th Academy of CASC
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510 Research Institute of 5th Academy of CASC
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Abstract

The utility model relates to a satellite-ground compatible dewar adaptable to two refrigeration methods, belonging to the technical field of space refrigeration. The satellite-ground compatible dewar adaptable to two refrigeration methods comprises a dewar outer barrel (1), a refrigerating window (2), a dewar inner core (3) and a heat conducting component (4). The dewar outer barrel is sleeved on the outer side of the dewar inner core, the bottom-free surface of the dewar outer barrel is welded with a feed-through collar of the dewar inner core (3), and a sealing ring is clamped in a sealing groove at the connecting joint of the dewar outer barrel and the feed-through collar. Besides, one face of the feed-through collar of the dewar inner core is welded with one face of a refrigerating window base of the refrigerating window, a sealing ring is clamed in a sealing groove at the joint of the feed-through collar and the refrigerating window base, and heat conducting screw nails of the heat conducting component are screwed on heat conducting sleeve threaded holes after penetrating through a flange of the dewar outer barrel. The utility model has the advantages that the satellite-ground compatible dewar has light weight, high heat conductivity, small cold loss and satellite-ground compatibility, and can optionally select refrigeration methods according to requirements of tasks and the like.

Description

Be suitable for the satellite-ground compatible dewar of two kinds of refrigeration modes
Technical field
The utility model belongs to the space refrigeration technical field for being suitable for the satellite-ground compatible dewar of two kinds of refrigeration modes.
Technical background
The infrared camera that the utility model relates to is one of useful load of remote sensing of the earth satellite, its Sensitive Apparatus infrared detector array must could effectively be worked under low temperature environment, this working temperature must make infrared detector array be in the vacuum environment far below local atmospheric dew point temperature if will work.Infrared camera not only will also need carry out various tests in rail work in the surface air environment.Though be during satellite flight under the track high vacuum state, infrared camera does not need the vacuum dewar can operate as normal yet, is necessary for infrared detector array during test in the surface air environment vacuum dewar protected is provided.What provide refrigerating capacity at rail for infrared camera in the utility model is radiation refrigerator, and vacuum dewar is installed in the radiation refrigerator.Radiation refrigerator is the cold black background that utilizes the cosmic space, and the principle of utilization radiation heat transfer is gone out the load heat radiation and reached the refrigeration purpose, is a kind of passive refrigeration modes.So it is impossible refrigeration in the surface air environment, must adopts other active refrigeration mode to replace radiation refrigerator and could in the surface air environment, work for infrared camera refrigerating environment is provided.J-T throttling refrigerator and liquid nitrogen refrigerating apparatus can both meet this requirement, and they have characteristics separately, can be according to the optional a kind of use wherein of the different testing requirements of infrared camera.This Dewar also should satisfy and can rely on the radiation refrigerator cooling can freeze with J-T throttling refrigerator or liquid nitrogen refrigerating apparatus in the surface air environment again at rail, i.e. the function of satellite-ground compatible.
Summary of the invention
The purpose of this utility model is can rely on the radiation refrigerator cooling can cooperate J-T throttling refrigerator or liquid nitrogen refrigerating apparatus to create refrigerating environment for the infrared camera operate as normal again in the surface air environment at rail in order to solve.
The purpose of this utility model is achieved through the following technical solutions.
A kind of satellite-ground compatible dewar that is suitable for two kinds of refrigeration modes of the present invention comprises Dewar urceolus, cold window, Dewar inner core, conducting-heat elements.
Wherein, the Dewar urceolus is for one side has the drum-shaped structure at the end, has the end one side just to have by the flange of heat conduction screw, and side of the no end one has annular seal groove;
Cold window is made up of cold window seat and germanium window, cold window seat is a cylindrical structural, having two inwards along the right cylinder central shaft from upper and lower surface is communicated with and the different right cylinder cavity of radius, internal fixation has the germanium window in the right cylinder cavity of one side, junction, two right cylinder cavities internal diameter is slightly less than germanium window radius, so that the germanium window is fixed; Have annular seal groove at another side;
The Dewar inner core is made up of cold finger, feed-through collar, adiabatic tube, cold-storage cover, insulator, lead and heat-conducting cylinder; The cold-storage cover is drum-shaped structure of the no end, heat-conducting cylinder has the drum-shaped structure at the end for one side, heat-conducting cylinder does not have an end and simultaneously processes the threaded hole corresponding with the heat conduction screw, there is the end simultaneously to have flange, cold-storage is placed on heat-conducting cylinder inside, and pass and weld fixing from the flange of heat-conducting cylinder, feed-through collar is the convex rotary body, inside has cylindrical cavities, the side has wire guide, lead is connected into through wire guide, is separated with insulator between lead and the feed-through collar, makes between lead and the feed-through collar and insulate, adiabatic tube is barrel shaped structure of the no end, and consistent with the feed-through collar internal diameter, adiabatic jacket casing is outside heat-conducting cylinder, and it is fixing that adiabatic tube one side inwall and heat-conducting cylinder do not have end outer wall welding on one side, the less one side of another side and feed-through collar external diameter is fixing along the corresponding welding of internal diameter, cold finger is for simultaneously there being the drum-shaped structure at the end, and external diameter is identical with heat-conducting cylinder, and it is fixing along the corresponding welding of outer wall with heat-conducting cylinder on one side that cold finger does not have the end;
Conducting-heat elements is made up of heat conduction screw, flange, corrugated tube, and heat conduction screw unthreaded portion is with corrugated tube, and corrugated tube is with flange outward;
The Dewar urceolus is enclosed within the Dewar inner core outside, and the lead-in wire boxing that the Dewar urceolus does not have end one side and Dewar inner core connects, and accompanies O-ring seal in the seal groove of Dewar urceolus and feed-through collar junction; The cold window seat of the feed-through collar of Dewar inner core one side and cold window is the company of weldering simultaneously, accompanies O-ring seal in the seal groove of feed-through collar and cold window seat junction, and the flange that the heat conduction screw of conducting-heat elements passes the Dewar urceolus is tightened on the heat-conducting cylinder threaded hole.
Wherein, the Dewar urceolus is selected hard aluminium alloy bar material for use, and outside surface is through after the polishing, adopt the nickel plating of electroless plating mode, thickness 10um, and then polishing makes surfaceness be not more than 0.1um, outside surface to polishing adopts vacuum plating mode gold-plated at last, thickness 0.2um.Coating can stand liquid nitrogen temperature to room temperature repeatedly 20 non-scales of circulation impact do not peel off.
Cold window seat adopts hard aluminium alloy bar material, outside surface adopt the nickel plating of electroless plating mode, and then polishing makes surfaceness be not more than 0.1um through after the polishing, outside surface to polishing adopts vacuum plating mode gold-plated at last, and coating ability liquid nitrogen impacts 20 non-scales and do not peel off; Germanium window germanium material is solidificated at room temperature state on the window of cold window seat with DW-3 low temperature glue, should be less than 5 * 10 through the helium mass spectrum leak detection leak rate -9Pam 3/ s.
Cold finger in the Dewar inner core adopts the oxygen-free copper bar, bears the effect that be cooled sample and heat transfer are installed.Feed-through collar, adiabatic tube and cold-storage cover all adopt stainless steel bars, bear heat insulation effect, and heat-conducting cylinder oxygen-free copper bar is born the effect of heat transfer, and insulator plays insulating effect with epoxy material, the lead copper cash.The Dewar inner core is carried out liquid nitrogen impact 20 times, should be through the helium mass spectrum leak detection leak rate less than 5 * 10 -9Pam 3/ s.
Heat conduction screw and flange oxygen-free copper bar, the screw thread of heat conduction screw are M16; Corrugated tube is selected the thin-walled copper tube impact briquetting of wall thickness 0.2mm for use, conducting-heat elements is carried out liquid nitrogen impact 20 times.
Sealing ring material is a fluororubber.
Principle of work of the present utility model is: when the atmospheric environment duty of ground, conducting-heat elements is not installed, can be assembled the J-T throttling refrigerator according to different demand Dewars and can assemble liquid nitrogen refrigerating apparatus yet and be evacuated down to 10 by J-T throttling refrigerator or liquid nitrogen refrigerating apparatus -2Pa, cooling is freezed to working temperature then, and adiabatic tube performance this moment heat-blocking action has enough colds and Dewar urceolus and cold window frost-free to guarantee infrared detector.When the rail duty, conducting-heat elements is installed, the radiation refrigerator cold is directly transferred to infrared detector by conducting-heat elements and cold finger and finishes process of refrigerastion.
Beneficial effect
(1) the utility model can either satisfy the use that the J-T throttling refrigerator also can adapt to these two kinds of different refrigeration modes of liquid nitrogen refrigerating apparatus;
(2) the utility model needs of both having satisfied the infrared camera ground experiment have also reached the heat transfer requirement of using at rail, promptly have the satellite-ground compatible function.
Description of drawings
Fig. 1-be the modular construction synoptic diagram of the utility model embodiment;
Fig. 2-be Dewar urceolus (1) the design of part synoptic diagram of the utility model embodiment;
Fig. 3-be cold window (2) the modular construction synoptic diagram of the utility model embodiment;
Fig. 4-be Dewar inner core (3) the modular construction synoptic diagram of the utility model embodiment;
Fig. 5-be conducting-heat elements (4) the modular construction synoptic diagram of the utility model embodiment;
Wherein, 1-Dewar urceolus, the cold window of 2-, 3-Dewar inner core, 4-conducting-heat elements, 5-O-ring seal, the cold window seat of 6-, 7-germanium window, 8-cold finger, 9-feed-through collar, the adiabatic tube of 10-, 11-cold-storage cover, 12-insulator, 13-lead, 14-heat conduction screw, 15-flange, 16-corrugated tube.
Embodiment
The utility model is described in further detail below in conjunction with drawings and Examples.
Embodiment
As shown in Figure 1, a kind of satellite-ground compatible dewar that is suitable for two kinds of refrigeration modes of the present utility model comprises Dewar urceolus 1, cold window 2, Dewar inner core 3, conducting-heat elements 4.
Wherein, Dewar urceolus 1 is for one side has the drum-shaped structure at the end, has the end one side just to have by the flange of heat conduction screw 15, and side of the no end one has annular seal groove;
Cold window 2 is made up of cold window seat 6 and germanium window 7, cold window seat 6 is a cylindrical structural, having two inwards along the right cylinder central shaft from upper and lower surface is communicated with and the different right cylinder cavity of radius, internal fixation has germanium window 7 in the right cylinder cavity of one side, two smaller and germanium window 7 radiuses of right cylinder cavity junction internal diameter are so that germanium window 7 is fixing; Have annular seal groove at another side;
Dewar inner core 3 is made up of cold finger 8, feed-through collar 9, adiabatic tube 10, cold-storage cover 11, insulator 12, lead 13 and heat-conducting cylinder 14; Cold-storage cover 11 is drum-shaped structure of the no end, heat-conducting cylinder 14 has the drum-shaped structure at the end for one side, the 14 no ends of heat-conducting cylinder, simultaneously process the threaded hole corresponding with heat conduction screw 15, there is the end simultaneously to have flange, cold-storage cover 11 places heat-conducting cylinder 14 inside, and pass and weld fixing from the flange of heat-conducting cylinder 14, feed-through collar 9 is the convex rotary body, inside has cylindrical cavities, the side has wire guide, lead 13 is connected into through wire guide, is separated with insulator 12 between lead 13 and the feed-through collar 9, makes insulation between lead and the feed-through collar 9, adiabatic tube 10 is barrel shaped structure of the no end, and consistent with feed-through collar 9 internal diameters, adiabatic tube 10 is enclosed within outside the heat-conducting cylinder 14, and adiabatic tube 10 one side inwalls and the outer wall welding on one side of the 14 no ends of heat-conducting cylinder are fixing, the less one side of another side and feed-through collar 9 external diameters is fixing along the corresponding welding of internal diameter, cold finger 8 is for simultaneously there being the drum-shaped structure at the end, and external diameter is identical with heat-conducting cylinder 14, and the 8 no ends of cold finger are fixing along the corresponding welding of outer wall with heat-conducting cylinder 14 on one side;
Conducting-heat elements 4 is made up of heat conduction screw 15, flange 16, corrugated tube 17, and heat conduction screw 15 unthreaded portions are with corrugated tube 17, the corrugated tube 17 outer flanges that are with;
Dewar urceolus 1 is enclosed within Dewar inner core 3 outsides, and the 1 no end of Dewar urceolus one side connects with feed-through collar 9 welderings of Dewar inner core 3, accompanies O-ring seal in the seal groove of Dewar urceolus 1 and feed-through collar 9 junctions; Feed-through collar 9 one sides of Dewar inner core 3 connect with the cold window seat 6 one side welderings of cold window 2, accompany O-ring seal 5 in the seal groove of feed-through collar 9 and cold window seat 6 junctions, and the flange that the heat conduction screw 15 of conducting-heat elements 4 passes Dewar urceolus 1 is tightened on heat-conducting cylinder 14 threaded holes.
Wherein, Dewar urceolus 1 is selected hard aluminium alloy bar material for use, and outside surface is through after the polishing, adopt the nickel plating of electroless plating mode, thickness 10um, and then polishing makes surfaceness be not more than 0.1um, outside surface to polishing adopts vacuum plating mode gold-plated at last, thickness 0.2um.Coating can stand liquid nitrogen temperature to room temperature repeatedly 20 non-scales of circulation impact do not peel off.
Cold window 2 outside surfaces adopt the nickel plating of electroless plating mode through after the polishing, and then polishing makes surfaceness be not more than 0.1um, and the outside surface to polishing adopts vacuum plating mode gold-plated at last, and coating ability liquid nitrogen impacts 20 non-scales and do not peel off.Germanium window germanium material is solidificated at room temperature state on the window of cold window seat 6 with DW-3 low temperature glue, should be less than 5 * 10 through the helium mass spectrum leak detection leak rate -9Pam 3/ s.
Cold finger 8 in the Dewar inner core 3 adopts the oxygen-free copper bar, bears the effect that be cooled sample and heat transfer are installed.Feed-through collar 9, adiabatic tube 10 and cold-storage cover 11 usefulness stainless steel barses are made into the rotary type part through the turning operation, bear heat insulation effect, heat-conducting cylinder 14 usefulness oxygen-free copper bars are made into the rotary type part through the turning operation, bear the effect of heat transfer, insulator 12 usefulness epoxy materials play insulating effect, and lead 13 is used copper cash.Dewar inner core 3 is carried out liquid nitrogen impact 20 times, should be through the helium mass spectrum leak detection leak rate less than 5 * 10 -9Pam 3/ s.
Heat conduction screw 15 and flange 16 oxygen-free copper bar, the screw thread of heat conduction screw 15 is M16; Corrugated tube 17 is selected the thin-walled copper tube impact briquetting of wall thickness 0.2mm for use, conducting-heat elements 4 is carried out liquid nitrogen impact 20 times.
O-ring seal 5 materials are fluororubber.

Claims (7)

1. be suitable for the satellite-ground compatible dewar of two kinds of refrigeration modes, it is characterized in that: comprise Dewar urceolus (1), cold window (2), Dewar inner core (3), conducting-heat elements (4); Wherein, Dewar urceolus (1) is for one side has the drum-shaped structure at the end, has the end one side just to have by the flange of heat conduction screw (15), and side of the no end one has annular seal groove; Cold window (2) is made up of cold window seat (6) and germanium window (7), cold window seat (6) is a cylindrical structural, having two inwards along the right cylinder central shaft from upper and lower surface is communicated with and the different right cylinder cavity of radius, internal fixation has germanium window (7) in the right cylinder cavity of one side, junction, two right cylinder cavities internal diameter is slightly less than germanium window (7) radius, so that germanium window (7) is fixing; Have annular seal groove at another side; Dewar inner core (3) is made up of cold finger (8), feed-through collar (9), adiabatic tube (10), cold-storage cover (11), insulator (12), lead (13) and heat-conducting cylinder (14); Cold-storage cover (11) is the drum-shaped structure of the no end, heat-conducting cylinder (14) has the drum-shaped structure at the end for one side, the no end of heat-conducting cylinder (14), simultaneously process and the corresponding threaded hole of heat conduction screw (15), there is the end simultaneously to have flange, cold-storage cover (11) places heat-conducting cylinder (14) inside, and pass and weld fixing from the flange of heat-conducting cylinder (14), feed-through collar (9) is the convex rotary body, inside has cylindrical cavities, the side has wire guide, lead (13) is connected into through wire guide, be separated with insulator (12) between lead (13) and the feed-through collar (9), make insulation between lead and the feed-through collar (9), adiabatic tube (10) is the barrel shaped structure of the no end, and it is consistent with feed-through collar (9) internal diameter, adiabatic tube (10) is enclosed within outside the heat-conducting cylinder (14), adiabatic tube (10) one side inwall and the outer wall welding on one side of the no end of heat-conducting cylinder (14) are fixing, the less one side of another side and feed-through collar (9) external diameter is fixing along the corresponding welding of internal diameter, cold finger (8) has the drum-shaped structure at the end for one side, external diameter is identical with heat-conducting cylinder (14), and the no end of cold finger (8) is fixing along the corresponding welding of outer wall with heat-conducting cylinder (14) on one side; Conducting-heat elements (4) is made up of heat conduction screw (15), flange (16), corrugated tube (17), and heat conduction screw (15) unthreaded portion is with corrugated tube (17), the outer flange that is with of corrugated tube (17);
Dewar urceolus (1) is enclosed within Dewar inner core (3) outside, and one side of the no end of Dewar urceolus (1) connects with feed-through collar (9) weldering of Dewar inner core (3), accompanies O-ring seal in the seal groove of Dewar urceolus (1) and feed-through collar (9) junction; Feed-through collar (9) one side of Dewar inner core (3) connects with cold window seat (6) the one side weldering of cold window (2), accompany O-ring seal (5) in the seal groove of feed-through collar (9) and cold window seat (6) junction, the flange that the heat conduction screw (15) of conducting-heat elements (4) passes Dewar urceolus (1) is tightened on heat-conducting cylinder (14) threaded hole.
2. the satellite-ground compatible dewar that is suitable for two kinds of refrigeration modes as claimed in claim 1, it is characterized in that: Dewar urceolus (1) is selected hard aluminium alloy bar material for use, and outside surface is coated with nickel and gold successively, nickel layer thickness 10um, golden layer thickness 0.2um; Coating can stand liquid nitrogen temperature to room temperature repeatedly 20 non-scales of circulation impact do not peel off.
3. want the 1 described satellite-ground compatible dewar that is suitable for two kinds of refrigeration modes as right, it is characterized in that: cold window seat (6) adopts hard aluminium alloy bar material, and outside surface is coated with nickel and gold, and coating ability liquid nitrogen impacts 20 non-scales and do not peel off;
4. want the 1 described satellite-ground compatible dewar that is suitable for two kinds of refrigeration modes as right, it is characterized in that: germanium window (7) is used germanium material, be solidificated at room temperature state on the window of cold window seat (6) with DW-3 low temperature glue, through the helium mass spectrum leak detection leak rate less than 5 * 10 -9Pam 3/ s.
5. the satellite-ground compatible dewar that is suitable for two kinds of refrigeration modes as claimed in claim 1, it is characterized in that: cold finger (8), heat-conducting cylinder (14) in the Dewar inner core (3) all adopt the oxygen-free copper bar, feed-through collar (9), adiabatic tube (10) and cold-storage cover (11) all adopt stainless steel bars, insulator (12) adopts epoxy material, and lead (13) is used copper cash; Dewar inner core (3) is carried out liquid nitrogen impact 20 times, should be through the helium mass spectrum leak detection leak rate less than 5 * 10 -9Pam 3/ s.
6. the satellite-ground compatible dewar that is suitable for two kinds of refrigeration modes as claimed in claim 1, it is characterized in that: heat conduction screw (15) and flange (16) are used the oxygen-free copper bar, and the screw thread of heat conduction screw (15) is M16; Corrugated tube (17) is selected the copper tube of wall thickness 0.2mm for use, conducting-heat elements (4) is carried out liquid nitrogen impact 20 times.
7. the satellite-ground compatible dewar that is suitable for two kinds of refrigeration modes as claimed in claim 1, it is characterized in that: O-ring seal (5) material is a fluororubber.
CNU200820182906XU 2008-12-22 2008-12-22 Satellite-ground compatible dewar adaptable to two refrigeration methods Expired - Lifetime CN201331659Y (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102435321A (en) * 2011-11-10 2012-05-02 中国科学院上海技术物理研究所 High-compatibility multi-functional test Duvel for separate Dewar hot load test
CN107121199A (en) * 2017-07-12 2017-09-01 中国科学院上海技术物理研究所 The fast cooling device and implementation method of a kind of super long alignment Dewar liquid nitrogen refrigerating

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102435321A (en) * 2011-11-10 2012-05-02 中国科学院上海技术物理研究所 High-compatibility multi-functional test Duvel for separate Dewar hot load test
CN102435321B (en) * 2011-11-10 2014-08-13 中国科学院上海技术物理研究所 High-compatibility multi-functional test Duvel for separate Dewar hot load test
CN107121199A (en) * 2017-07-12 2017-09-01 中国科学院上海技术物理研究所 The fast cooling device and implementation method of a kind of super long alignment Dewar liquid nitrogen refrigerating

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Granted publication date: 20091021

Effective date of abandoning: 20081222