CN110779628B - Large-area-array infrared focal plane Dewar cold finger supporting structure with high heat resistance and high rigidity - Google Patents
Large-area-array infrared focal plane Dewar cold finger supporting structure with high heat resistance and high rigidity Download PDFInfo
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- CN110779628B CN110779628B CN201910896601.8A CN201910896601A CN110779628B CN 110779628 B CN110779628 B CN 110779628B CN 201910896601 A CN201910896601 A CN 201910896601A CN 110779628 B CN110779628 B CN 110779628B
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- 239000003365 glass fiber Substances 0.000 claims abstract description 61
- 239000000835 fiber Substances 0.000 claims description 53
- 239000003292 glue Substances 0.000 claims description 29
- 238000003466 welding Methods 0.000 claims description 13
- 238000002347 injection Methods 0.000 claims description 10
- 239000007924 injection Substances 0.000 claims description 10
- 239000000126 substance Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 7
- 238000005452 bending Methods 0.000 description 5
- 238000005057 refrigeration Methods 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009966 trimming Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
- G01J5/02—Constructional details
- G01J5/0205—Mechanical elements; Supports for optical elements
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Abstract
The invention discloses a large-area array infrared focal plane Dewar cold finger supporting structure with high heat resistance and high rigidity, which comprises: the device comprises a cold finger, a Dewar, a pulse tube, a hot end, a glass fiber bundle and a roller device; the cold finger and the hot end are respectively welded at two ends of the pulse tube; the temperature of the hot end is between-30 ℃ and-20 ℃, and the temperature of the cold finger is below 80K; the dewar is welded on the hot end, and the dewar is sleeved on the outer surface of the pulse tube; the roller device is arranged on the Dewar, and the glass fiber bundle connects the cold finger with the Dewar through the roller device. The invention realizes the high-rigidity support of the cold finger and the rigidity decoupling of the cold finger along the axial direction of the pulse tube by utilizing the advantages of the glass fiber bundle, solves the structural deformation problem of the over-constrained cold finger, improves the structural thermal resistance and greatly reduces the heat leakage rate of the cold finger.
Description
Technical Field
The invention belongs to the technical field of space camera large-area array infrared focal plane refrigeration, and particularly relates to a Dewar cold finger support structure with high heat resistance and high rigidity for a large-area array infrared focal plane.
Background
In order to obtain good imaging quality, the infrared area array detector needs to work in a deep low temperature environment (below 80K), so that the detector needs to be refrigerated and dewar-packaged to form a dewar assembly. At present, a pulse tube refrigerator has the technical advantages of long service life, simple structure, small mechanical vibration, high refrigeration efficiency and the like, and has been the first choice for refrigeration of a space infrared camera area-array detector instead of a radiation refrigerant. The pulse tube refrigerator is composed of a compressor, an expander, a hot end, a pulse tube, a heat regenerator, a cold finger and other structures, wherein the hot end, the pulse tube, the heat regenerator and the cold finger are subjected to Dewar packaging with a detector to form a Dewar assembly, one end of the pulse tube is connected with the hot end, the other end of the pulse tube is connected with the cold finger, the pulse tube is of a thin-wall structure, the pulse tube and the hot end, the pulse tube and the cold finger are welded for ensuring the air tightness of the structure, the infrared area array detector is connected with the cold finger through a low-heat-resistance structural member, and the cold finger provides a low-temperature environment for the detector.
In order to reduce the thermal resistance between the infrared area array detector and the cold finger as much as possible, the cold finger needs to have the characteristics of large area and good heat conduction performance, so that the cold finger is made of copper with good heat conduction performance and is of a solid structure. At present, the infrared detector mostly adopts a splicing mode to meet the requirement of a large-area array focal plane, the size is dozens of millimeters or even hundreds of millimeters, a cold finger is used as a heat conduction structure of the detector, the structural size and the weight are not negligible, the cold finger cannot bear the vibration in the satellite launching stage only by being welded and connected with a thin wall of a pulse tube, cracks are easily generated at the welding position, the performance of a refrigerator is reduced, the refrigerator is unstable, and the refrigerator cannot normally work finally, so that a supporting structure between the cold finger and a Dewar component needs to be added, the rigidity of the whole structure is improved, but the added supporting structure needs to have the characteristic of high thermal resistance, and the heat leakage rate of the Dewar component is reduced.
The traditional Dewar cold finger supporting structure adopts a metal supporting column to connect a cold finger with a Dewar, one end of the cold finger of the structural type is welded and fixed with a pulse tube, the other end of the cold finger adopts the metal supporting column to be connected with the Dewar structure, the metal supporting column and the Dewar are both in hard connection and easy to over-restrict, large assembly stress exists, the cold finger is in a low-temperature structure, the Dewar is in a normal-temperature structure, and the metal supporting column is connected with the Dewar to increase heat leakage.
Disclosure of Invention
The technical problem solved by the invention is as follows: the defects of the prior art are overcome, the large-area-array infrared focal plane Dewar cold finger supporting structure with high heat resistance and high rigidity is provided, the advantages of glass fiber bundles are utilized to realize high rigidity support of the cold finger, rigidity decoupling of the cold finger along the axial direction of the pulse tube is realized, the problem of structural deformation caused by over-constraint of the cold finger is solved, the structural heat resistance is improved, and the heat leakage rate of the cold finger is greatly reduced.
The purpose of the invention is realized by the following technical scheme: a large-area array infrared focal plane Dewar cold finger supporting structure with high heat resistance and high rigidity comprises: the device comprises a cold finger, a Dewar, a pulse tube, a hot end, a glass fiber bundle and a roller device; the cold finger and the hot end are respectively welded at two ends of the pulse tube; the temperature of the hot end is between-30 ℃ and-20 ℃, and the temperature of the cold finger is below 80K; the dewar is welded on the hot end, and the dewar is sleeved on the outer surface of the pulse tube; the roller device is arranged on the Dewar, and the glass fiber bundle connects the cold finger with the Dewar through the roller device.
In the large-area-array infrared focal plane Dewar cold finger support structure with high thermal resistance and high rigidity, the back of the cold finger is provided with a fiber bundle interface, and the glass fiber bundle penetrates through the fiber bundle interface and connects the cold finger with the Dewar through the roller device.
In the large-area-array infrared focal plane Dewar cold finger support structure with high thermal resistance and high rigidity, the annular groove of the Dewar is provided with eight roller devices, and the eight roller devices are uniformly arranged on the periphery of the annular groove; the eight roller devices comprise a first roller device, a second roller device, a third roller device, a fourth roller device, a fifth roller device, a sixth roller device, a seventh roller device and an eighth roller device; the fiber bundle interface comprises a first fiber bundle interface, a second fiber bundle interface, a third fiber bundle interface and a fourth fiber bundle interface; the glass fiber bundle bypasses the first roller device and then passes through the first fiber bundle interface, bypasses the third roller device after bypassing the fourth roller device, bypasses the sixth roller device after passing through the second fiber bundle interface, bypasses the third fiber bundle interface after bypassing the fifth roller device, bypasses the seventh roller device after bypassing the eighth roller device, then passes through the fourth fiber bundle interface, and then bypasses the second roller device.
In the large-area array infrared focal plane Dewar cold finger support structure with high thermal resistance and high rigidity, the roller device comprises a roller and a roller shaft; wherein the roller shaft is connected with the roller.
In the large-area array infrared focal plane Dewar cold finger support structure with high thermal resistance and high rigidity, the roller comprises a roller body and a roller shaft through hole; wherein, a roller groove and a roller shaft mounting hole are arranged in the ring groove; the roller is arranged in the roller groove, and the roller shaft penetrates through the roller shaft through hole and is adhered in the roller shaft mounting hole through glue.
In the large-area array infrared focal plane Dewar cold finger support structure with high thermal resistance and high rigidity, the first fiber bundle interface is positioned at the midpoint of the connecting line of the first roller device and the fourth roller device; the second fiber bundle interface is positioned at the midpoint of a connecting line of the third roller device and the sixth roller device; the third fiber bundle interface is positioned at the midpoint of a connecting line of the fifth roller device and the eighth roller device; and the fourth fiber bundle interface is positioned at the midpoint of the connecting line of the second roller device and the seventh roller device.
In the large-area array infrared focal plane Dewar cold finger support structure with high thermal resistance and high rigidity, the fiber bundle interface is provided with a glue injection hole; the glue injection holes are used for injecting glue to the glass fiber bundles and the cold fingers.
In the large-area-array infrared focal plane Dewar cold finger supporting structure with high thermal resistance and high rigidity, the back of the cold finger is provided with a welding surface, and the cold finger and the pulse tube are welded at the welding surface.
In the large-area array infrared focal plane dewar cold finger support structure with high thermal resistance and high rigidity, the dewar is provided with an observation window, wherein the observation window is used for observing that the glass fiber bundle passes through the fiber bundle interface.
In the large-area array infrared focal plane dewar cold finger support structure with high thermal resistance and high rigidity, the dewar is provided with a welding inner ring surface; wherein, the dewar and the pulse tube are welded on the inner ring surface.
Compared with the prior art, the invention has the following beneficial effects:
1) the cold finger supporting structure adopts the glass fiber bundle, so that the two-dimensional high-rigidity support of the cold finger is realized, the rigidity decoupling of the cold finger along the axial direction of the pulse tube is realized, and the assembly stress of the axial positioning of the pulse tube is reduced;
2) in the cold finger supporting structure, the low thermal conductivity and small section of the glass fiber bundle can greatly improve the structural thermal resistance and reduce the overall heat leakage rate of the infrared focal plane assembly refrigeration structure;
3) in the cold finger supporting structure, the glass fiber is connected with the cold finger and the Dewar in a glue injection assembly mode, so that the problem of structural deformation of over-constrained assembly of the cold finger and the Dewar is solved, and the assembly stress of the cold finger and the Dewar is reduced;
4) the glass fiber bundle of the cold finger support structure is light in weight, the overall weight of the infrared camera focal plane assembly is reduced, and the problem that the infrared focal plane assembly refrigeration structure requires good vibration resistance and small heat leakage is solved.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is an overall schematic view of a production apparatus according to the present invention;
FIG. 2 is a schematic structural view of a cold finger according to the present invention;
FIG. 3 is a schematic structural view of a Dewar according to the present invention;
FIG. 4 is a schematic view of a roller according to the present invention;
FIG. 5 is a schematic view of the attachment of glass fiber bundles according to the present invention;
FIG. 6 is a schematic view of the connection of a glass fiber bundle to a roller according to the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
FIG. 1 is an overall schematic view of a production apparatus according to the present invention. As shown in fig. 1, the large-area array infrared focal plane dewar cold finger supporting structure with high thermal resistance and high rigidity comprises: the device comprises a cold finger 1, a Dewar 2, a pulse tube 3, a hot end 4, a glass fiber bundle 5 and a roller device; wherein the content of the first and second substances,
the cold finger 1 and the hot end 4 are respectively welded at two ends of the pulse tube 3; the temperature of the hot end 4 is between minus 30 ℃ and minus 20 ℃, and the temperature of the cold finger 1 is below 80K; the Dewar 2 is welded on the hot end 4, and the Dewar 2 is sleeved on the outer surface of the pulse tube 3; the roller device is arranged on the Dewar 2, and the glass fiber bundle 5 connects the cold finger 1 with the Dewar 2 through the roller device (as shown in figure 6). The roller device comprises a roller 6 and a roller shaft 7; wherein the roller shaft 7 is connected with the roller 6.
The roller 6 comprises a roller body 61 and a roller shaft through hole 62; wherein, a roller groove 24 and a roller shaft mounting hole 25 are arranged in the ring groove 21; the roller 6 is arranged in the roller groove 24, and the roller shaft 7 passes through the roller shaft through hole 62 and is adhered to the roller shaft mounting hole 25 through glue.
According to the structural requirements of a pulse tube refrigerator, a cold finger 1 and a hot end 4 are welded at two ends of a pulse tube 3, the temperature of the hot end 4 is-30 ℃ to-20 ℃, the temperature of the cold finger 1 is below 80K, the pulse tube 3 is used as a connecting structure of the cold finger 1 and the hot end 4, in order to reduce heat leakage between the cold finger 1 and the hot end 4 as much as possible, the pulse tube 3 is of a circular tube structure with the wall thickness as thin as possible, and the wall thickness in the prior art can be as thin as 0.2 mm. The dewar 2 is welded to the hot end 4, also at a temperature between-30 ℃ and-20 ℃.
As shown in fig. 2, the cold finger 1 is a pure copper circular plate structure, the front end is a plane connected with the infrared area array detector, the back is characterized by a fiber bundle interface 11, a glue injection hole 12 and a welding surface 13, the fiber bundle interface 11 is provided with a through hole, the diameter of the through hole is slightly larger than that of the glass fiber bundle 5, the glass fiber bundle 5 penetrates through the through hole when being connected with the cold finger 1 and the dewar 2, the glue injection hole 12 is arranged for injecting glue into the glass fiber bundle 5 and the cold finger 1, and the cold finger 1 and the pulse tube 3 are connected on the welding surface 13 in a welding mode.
As shown in fig. 5, the ring groove 21 of the dewar 2 is provided with eight roller devices, and the eight roller devices are uniformly arranged on the periphery of the ring groove 21; the eight roller devices comprise a first roller device 100, a second roller device 200, a third roller device 300, a fourth roller device 400, a fifth roller device 500, a sixth roller device 600, a seventh roller device 700, an eighth roller device 800,
As shown in fig. 5, the fiber bundle interface 11 includes a first fiber bundle interface 111, a second fiber bundle interface 112, a third fiber bundle interface 113, and a fourth fiber bundle interface 114;
the glass fiber bundle 5 passes through the first fiber bundle interface 111 after passing around the first roller device 100, passes through the third roller device 300 after passing around the fourth roller device 400, passes through the second fiber bundle interface 112, passes through the sixth roller device 600, passes through the third fiber bundle interface 113 after passing around the fifth roller device 500, passes through the seventh roller device 700 after passing around the eighth roller device 800, passes through the fourth fiber bundle interface 114, and passes through the second roller device 200.
In the embodiment, the cold finger 1 and the flange 2 can be fixedly supported by one glass fiber bundle 5, the tension applied by each fiber bundle section can be kept consistent, and the cold finger 1 and the flange 2 are uniformly stressed. When the temperature of the environment where the structure is located changes, the thermal deformation caused by the fiber bundles to the cold fingers is annularly and uniformly distributed, and the cold fingers are ensured not to change in position.
As shown in fig. 3, the dewar 2 is provided with a ring groove 21, an observation window 22, a welding inner ring surface 23, a roller groove 24 and a roller shaft mounting hole 25, when the glass fiber bundle 5 is connected with the cold finger 1 and the dewar 2, the glass fiber bundle 5 is mounted in the ring groove 21, the ring groove 21 is filled with glue, the glass fiber bundle 5 is bonded on the dewar 2, and the plane where the ring groove 21 is located needs to coincide with the plane where the fiber bundle interface 11 on the cold finger 1 is located. The observation windows 22 are formed by the glass fiber bundles 5 passing through the through holes of the fiber bundle interfaces 11 of the cold finger 1, and a plurality of observation windows 22 are arranged around the Dewar 2. The roller groove 24 is the space reserved for installing the roller 6, the glass fiber bundle 5 has a bending angle in the process of connecting the cold finger 1 and the Dewar 2, the roller 6 is installed at the bending position, the glass fiber bundle 5 passes through the roller 6, sliding friction is changed into rolling friction, the friction force borne by the glass fiber bundle 5 is greatly reduced, and meanwhile, the damage of sharp-angled edges at the bending position of the Dewar 2 structure to the glass fiber bundle 5 is avoided.
As shown in fig. 4, the roller 6 is characterized by a roller body 61 and a roller shaft through hole 62, the roller 6 is mounted in the roller groove 24 of the dewar 2 by the roller shaft 7 passing through the roller shaft through hole 62, and the roller shaft 7 is bonded in the roller shaft mounting hole 25 of the dewar 2 by glue.
The cold finger 1, the Dewar 2, the pulse tube 3 and the hot end 4 are welded according to the structural requirements, the cold finger, the Dewar 2, the pulse tube 3 and the hot end 4 are assembled, then the glass fiber bundle 5 sequentially penetrates through the fiber bundle interface 11 of the cold finger 1, the roller groove 61 and the annular groove 21 of the Dewar 2, the state of the glass fiber bundle 5 is checked through the observation window 22 in the inserting process, and after the inserting is finished, a certain force load is applied to two ends of the glass fiber bundle 5, so that the glass fiber bundle 5 is in a tensioned state. And (3) injecting glue into the through hole of the fiber bundle interface 11 through the glue injection hole 12, injecting glue into the ring groove 21 of the Dewar 2, removing the force load after the glue is completely cured, trimming the redundant glass fiber bundle 5, and finishing the process implementation of the glass fiber bundle 5.
The tensioned glass fiber bundle 5 forms a two-dimensional network in a plane perpendicular to the axial direction of the pulse tube 3 to realize the connection of the cold finger 1 and the Dewar 2, the high tensile rigidity of the glass fiber bundle 5 realizes the positioning and supporting of the cold finger 1 in the plane perpendicular to the axial direction of the pulse tube 3 to limit the vibration amplitude of the cold finger 1, and the low bending rigidity of the glass fiber bundle 5 realizes the rigidity decoupling of the cold finger along the axial direction of the pulse tube 3 to reduce the stress at the welding position of the pulse tube 3.
According to the structural requirement of the pulse tube refrigerator, the cold finger 1, the Dewar 2, the pulse tube 3 and the hot end 4 are welded into an assembly, and the relative positions of the cold finger 1, the Dewar 2, the pulse tube 3 and the hot end 4 are fixed. The roller shaft 7 penetrates through the roller shaft through hole 62 to install the roller 6 into the roller groove 24 of the Dewar 2, the roller shaft 7 is connected into the roller shaft installation hole 25 of the Dewar 2 through glue, and the glass fiber bundle 5 is installed after the glue is completely cured.
According to the sequence of fig. 5, the glass fiber bundle 5 sequentially passes through the fiber bundle interface 11 of the cold finger 1, the roller groove 61 and the annular groove 21 of the dewar 2, the state of the glass fiber bundle 5 is checked through the observation window 22 during the inserting process, and after the inserting process is finished, a certain force load is applied to two ends of the glass fiber bundle 5, so that the glass fiber bundle 5 is in a tensioned state. And (3) injecting glue into the through hole of the fiber bundle interface 11 through the glue injection hole 12, injecting glue into the ring groove 21 of the Dewar 2, removing the force load after the glue is completely cured, trimming the redundant glass fiber bundle 5, and finishing the process implementation of the glass fiber bundle 5. The glue used in the examples is low temperature glue DW-3.
According to the large-area-array infrared focal plane cold finger supporting structure based on the glass fiber, which is disclosed by the invention, an infrared focal plane assembly with the weight of 3kg, the power of 3W and the working temperature as low as 70K is successfully developed, the heat leakage caused by the cold finger supporting structure is only 0.5 percent of that of the traditional supporting structure, and the assembly can bear 20g of random vibration.
The high tensile rigidity of the glass fiber bundle can realize two-dimensional high-rigidity support of the cold finger, the low bending rigidity of the glass fiber bundle can realize rigidity decoupling of the cold finger along the axial direction of the pulse tube, the low thermal conductivity and the small section of the glass fiber can improve the structural thermal resistance and reduce heat leakage, the glass fiber and the structural member are connected in a glue injection assembly mode, the problem of over-constrained structural deformation of the two ends of the cold finger can be solved, the glass fiber bundle is light in weight, the support structure solves the problem of contradiction between the requirement of good vibration resistance and small heat leakage of the cold finger, and the support structure is suitable for Dewar cold finger support structures of various infrared area array detectors.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (6)
1. The utility model provides a big infrared focal plane dewar cold finger bearing structure of high thermal resistance high rigidity, its characterized in that includes: the device comprises a cold finger (1), a Dewar (2), a pulse tube (3), a hot end (4), a glass fiber bundle (5) and a roller device; wherein the content of the first and second substances,
the cold finger (1) and the hot end (4) are respectively welded at two ends of the pulse tube (3);
the temperature of the hot end (4) is between-30 ℃ and-20 ℃, and the temperature of the cold finger (1) is below 80K;
the Dewar (2) is welded on the hot end (4), and the Dewar (2) is sleeved on the outer surface of the pulse tube (3);
the roller device is arranged on the Dewar (2), and the glass fiber bundle (5) connects the cold finger (1) with the Dewar (2) through the roller device;
the back of the cold finger (1) is provided with a fiber bundle interface (11), the glass fiber bundle (5) penetrates through the fiber bundle interface (11) and connects the cold finger (1) with the Dewar (2) through the roller device, the glass fiber bundle (5) is fixed in the annular groove (21), the annular groove (21) is filled with glue, and the glass fiber bundle (5) is bonded on the Dewar (2);
the ring groove (21) of the Dewar (2) is provided with eight roller devices which are uniformly arranged on the periphery of the ring groove (21); the eight roller devices comprise a first roller device (100), a second roller device (200), a third roller device (300), a fourth roller device (400), a fifth roller device (500), a sixth roller device (600), a seventh roller device (700) and an eighth roller device (800);
the fiber bundle interface (11) comprises a first fiber bundle interface (111), a second fiber bundle interface (112), a third fiber bundle interface (113) and a fourth fiber bundle interface (114);
the glass fiber bundle (5) bypasses the first roller device (100), then passes through the first fiber bundle interface (111), then bypasses the fourth roller device (400), then bypasses the third roller device (300), then bypasses the second fiber bundle interface (112), then bypasses the sixth roller device (600), then bypasses the fifth roller device (500), then passes through the third fiber bundle interface (113), then bypasses the eighth roller device (800), then bypasses the seventh roller device (700), then passes through the fourth fiber bundle interface (114), and then bypasses the second roller device (200);
the roller device comprises a roller (6) and a roller shaft (7); wherein the roller shaft (7) is connected with the roller (6);
the roller (6) comprises a roller body (61) and a roller shaft through hole (62); wherein the content of the first and second substances,
a roller groove (24) and a roller shaft mounting hole (25) are formed in the annular groove (21);
the roller (6) is arranged in the roller groove (24), and the roller shaft (7) penetrates through the roller shaft through hole (62) and is adhered to the roller shaft mounting hole (25) through glue.
2. The large-area-array infrared focal plane Dewar cold finger support structure with high thermal resistance and high rigidity according to claim 1, which is characterized in that: the first fiber bundle interface (111) is positioned at the midpoint of a connecting line of the first roller device (100) and the fourth roller device (400); the second fiber bundle interface (112) is positioned at the midpoint of a connecting line of the third roller device (300) and the sixth roller device (600); the third fiber bundle interface (113) is positioned at the midpoint of a connecting line of the fifth roller device (500) and the eighth roller device (800); the fourth fiber bundle interface (114) is positioned at the midpoint of a connecting line of the second roller device (200) and the seventh roller device (700).
3. The large-area-array infrared focal plane Dewar cold finger support structure with high thermal resistance and high rigidity according to claim 1, which is characterized in that: the fiber bundle interface (11) is provided with a glue injection hole (12); the glue injection holes (12) are used for injecting glue to the glass fiber bundles (5) and the cold fingers (1).
4. The large-area-array infrared focal plane Dewar cold finger support structure with high thermal resistance and high rigidity according to claim 1, which is characterized in that: the back of the cold finger (1) is provided with a welding surface (13), wherein the cold finger (1) and the pulse tube (3) are welded on the welding surface (13).
5. The large-area-array infrared focal plane Dewar cold finger support structure with high thermal resistance and high rigidity according to claim 1, which is characterized in that: an observation window (22) is arranged on the Dewar (2), wherein the observation window (22) is used for observing that the glass fiber bundle (5) passes through the fiber bundle interface (11).
6. The large-area-array infrared focal plane Dewar cold finger support structure with high thermal resistance and high rigidity according to claim 1, which is characterized in that: a welding inner ring surface (23) is arranged on the Dewar (2); wherein, the Dewar (2) and the pulse tube (3) are welded on the inner ring surface (23) of the welding.
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| CN201910896601.8A CN110779628B (en) | 2019-09-23 | 2019-09-23 | Large-area-array infrared focal plane Dewar cold finger supporting structure with high heat resistance and high rigidity |
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| CN101762855A (en) * | 2009-12-30 | 2010-06-30 | 北京空间机电研究所 | Radial multipoint glue joint axial three-point clamping and supporting method of spatial lens |
| CN206179845U (en) * | 2016-11-04 | 2017-05-17 | 北京有色金属研究总院 | Composite films lead wire type metal dewar |
| CN108955899A (en) * | 2018-07-24 | 2018-12-07 | 中国电子科技集团公司第十研究所 | Infrared detector Dewar and detector assembly |
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