CN203203713U - Annular supporting structure of inner tube thin-wall portion of micro metal dewar - Google Patents
Annular supporting structure of inner tube thin-wall portion of micro metal dewar Download PDFInfo
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- CN203203713U CN203203713U CN 201320001376 CN201320001376U CN203203713U CN 203203713 U CN203203713 U CN 203203713U CN 201320001376 CN201320001376 CN 201320001376 CN 201320001376 U CN201320001376 U CN 201320001376U CN 203203713 U CN203203713 U CN 203203713U
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- support ring
- dewar
- supporting ring
- lower support
- pipe
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Abstract
Disclosed in the utility model is an annular supporting structure of an inner tube thin-wall portion of a micro metal dewar. The annular supporting structure comprises an upper supporting ring, a lower supporting ring and reinforced ribs connecting the upper supporting ring and the lower supporting ring. The upper supporting ring and the lower supporting ring are parallel to each other and are coaxial. There are three or more reinforced ribs connecting the upper supporting ring and the lower supporting ring and the reinforced ribs are uniformly distributed in a 360-degree range; cross sectional areas of the reinforced ribs are equal to or less than 0.16 mm<2>; included angles between the reinforced ribs and the upper supporting ring and the lower supporting ring is from 20 degrees to 70 degrees; and the reinforced ribs are in rigid connection with the upper supporting ring and the lower supporting ring. The annular supporting structure employs a titanium alloy material with high thermal resistivity. According to the utility model, anti-vibration and shock-resistant capabilities of the micro metal dewar can be effectively enhanced; and vibration displacement of an infrared focal plane detector chip installed at the bottom of the inner tube of the dewar is controlled to be within 1.5 microns and is less than 1/10 of a pixel size of the chip of the detector, thereby meeting a strict requirement of high precision imaging on a detector assembly in a complicated dynamic environment.
Description
Technical field
The utility model belongs to the infrared eye technical field, is specifically related to a kind of ring-type supporting construction that strengthens the anti-vibration of micro metal Dewar, impact resistance.
Background technology
The micro metal Dewar is one of important composition parts of infrared detector module, be mainly used in encapsulating the infrared focal plane detector chip, for infrared detector chip provides reliable and stable vacuum and low temperature working environment, mechanical interface, optical interface and with the interface of refrigeration machine coupling etc., accompanying drawing 1 encapsulates synoptic diagram for the infrared focal plane detector chip.
Pipe is one of core component of micro metal Dewar in the Dewar, and infrared detector chip is installed in pipe bottom surface in the Dewar usually, and interior pipe and refrigerator connect, and the refrigerating capacity that refrigerator provides is directly cooled off pipe bottom surface in the Dewar.And in the integrated form Dewar structure, pipe also is the cold finger of refrigeration machine simultaneously in the Dewar.
The cold that refrigeration machine or refrigerator can provide is limited, and the power consumption of detector chip generally is no more than 50mW behind the employing CMOS sensing circuit.Pipe thin-walled portion leakage heat is the principal element that causes the Dewar heat load in the Dewar, and the interior pipe of general Dewar conductive heat leakage accounts for Dewar and always leaks 40%～50% of heat.Be the control heat load, the wall thickness of pipe thin-walled portion generally is no more than 0.15mm, the about 70mm of length in the micro metal Dewar.The structural strength of pipe thin-walled portion is lower in the existing Dewar, can make the vibration displacement of micro metal Dewar bottom surface bigger, cause packaged infrared detector chip vibration displacement excessive, image blur, the modulation transfer function (MTF) index of optical system can't guarantee.Infrared detector module unavoidably is subjected to high-intensity oscillation, percussive action in advanced dynamic environment such as space flight, guidance, but its imaging requirements vibration displacement amount is less than 1/3 of infrared detector chip pixel dimension, in part high precision imaging system to the control of vibration displacement amount even require less than 1/10 of infrared detector chip pixel dimension.
In order to satisfy infrared detector module safe and reliable performance requirement under rugged surroundings such as space flight, guidance, do not have under the prerequisite of obvious increase in the control heat load, take the effective technology measure to improve anti-vibration, the impact resistance of pipe thin-walled portion in the Dewar, the vibration displacement of controlling packaged infrared detector chip is one of important content of most micro metal Dewar developments.But also do not improve at present, the technology of pipe thin-walled portion support strength in the Dewar.
Summary of the invention
At the application demand of detector module on focal plane of infrared ray under high-intensity oscillations such as space flight, guidance, percussive action condition, the utility model provides the ring-type supporting construction of pipe thin-walled portion in a kind of micro metal Dewar, to improve the structural strength of pipe thin-walled portion in the Dewar, improve its anti-vibration, impact resistance.
The ring-type supporting construction of pipe thin-walled portion in the micro metal Dewar described in the utility model is characterized by: be made of upper support ring, lower support ring and the reinforcement that connects upper and lower support ring.The upper support ring is parallel and coaxial with the lower support ring.The reinforcement quantity that connects upper and lower support ring is 3 and above and 360
oEvenly distribute in the scope; The cross-sectional area of reinforcement is equal to or less than 0.16mm
2For making the upper support ring be positioned at the position that is no more than Dewar pipe thin-walled portion length 2/3 from the pipe root, the angle of reinforcement and upper and lower support ring is between 20
oTo 70
oBetween; Reinforcement and upper and lower support ring are rigidly connected.The internal diameter of upper support ring can cooperate with the crest clearance of pipe thin-walled portion in the Dewar, the external diameter of lower support ring can with the internal diameter clearance fit of Dewar shell, after being installed in the micro metal Dewar, the thin-walled portion of pipe is rigidly connected in upper support ring and the Dewar, and lower support ring and Dewar shell are rigidly connected.Upper support ring, lower support ring and reinforcement all adopt the bigger titanium alloy material of thermal resistivity.
The utility model is by using proof: under high-intensity oscillation, percussive action, the vibration displacement that is installed in the infrared focal plane detector chip of pipe bottom surface in the Dewar can be controlled in 1.5 μ m, less than 1/10 of detector chip pixel dimension, anti-vibration, the impact resistance of micro metal Dewar are effectively strengthened, and satisfy under the advanced dynamic environment high precision imaging to the harsh requirement of detector assembly.
Description of drawings
Fig. 1 is infrared focal plane detector chip encapsulation synoptic diagram;
Fig. 2 is the scheme of installation of the utility model ring-type supporting construction in the micro metal Dewar;
Fig. 3 is the stereographic map of the utility model ring-type supporting construction.
Among the figure, 1 is the upper support ring, and 2 is the lower support ring, and 3 is reinforcement, and 4 is pipe in the Dewar, and 5 is the Dewar shell, and 6 is the chip mounting substrate, and 7 is the infrared focal plane detector chip, and 8 is interior pipe root.
Embodiment:
Below in conjunction with accompanying drawing, the utility model is described in further detail by embodiment.
Embodiment one: as shown in Figures 2 and 3, the ring-type supporting construction of pipe thin-walled portion in the embodiment one described micro metal Dewar is made of upper support ring 1, lower support ring 2 and the reinforcement 3 that connects upper and lower support ring.Upper support ring 1 is parallel and coaxial with lower support ring 2.The reinforcement quantity that connects upper and lower support ring is 4, and is 90
oEven distribution; The cross sectional dimensions of reinforcement 3 is 0.4mm * 0.4mm, and cross-sectional area is 0.16mm
2Rectangle; In order to guarantee that upper support ring 1 is positioned at the position that is no more than Dewar pipe 4 thin-walled portion length 2/3 from pipe root 8, make that managing 4 thin-walled portions in the Dewar has at least 1/3 length fully adiabatic, reinforcement 3 is 45 with the angle of upper and lower support ring
oReinforcement 3 is taked welding or bonding the connection with upper and lower support ring.The internal diameter of upper support ring 1 can cooperate with the crest clearance of pipe 4 thin-walled portions in the Dewar, the external diameter of lower support ring 2 can with the internal diameter clearance fit of Dewar shell 5, after being installed in the micro metal Dewar, upper support ring 1 welds or bonding the connection with the thin-walled portion of the interior pipe 4 of Dewar, and lower support ring 2 is welded to connect with Dewar shell 5.Upper support ring 1, lower support ring 2 and reinforcement 3 all adopt the bigger titanium alloy material Ti-6Al-4V(TC4 of thermal resistivity).
Embodiment two: as shown in Figures 2 and 3, the ring-type supporting construction of pipe thin-walled portion in the embodiment two described micro metal Dewars is made of upper support ring 1, lower support ring 2 and the reinforcement 3 that connects upper and lower support ring.Upper support ring 1 is parallel and coaxial with lower support ring 2.The reinforcement quantity that connects upper and lower support ring is 3, and is 120
oEven distribution; The cross-sectional area of reinforcement 3 is for being equal to or less than 0.16mm
2Circle; In order to guarantee that upper support ring 1 is positioned at the position that is no more than Dewar pipe 4 thin-walled portion length 2/3 from pipe root 8, make that managing 4 thin-walled portions in the Dewar has at least 1/3 length fully adiabatic, reinforcement 3 is 20 with the angle of upper and lower support ring
oReinforcement 3 is taked welding or bonding the connection with upper and lower support ring.The internal diameter of upper support ring 1 can cooperate with the crest clearance of pipe 4 thin-walled portions in the Dewar, the external diameter of lower support ring 2 can with the internal diameter clearance fit of Dewar shell 5, after being installed in the micro metal Dewar, upper support ring 1 welds or bonding the connection with the thin-walled portion of the interior pipe 4 of Dewar, and lower support ring 2 is welded to connect with Dewar shell 5.Upper support ring 1, lower support ring 2 and reinforcement 3 all adopt the bigger titanium alloy material Ti-5Al-2.5Sn of thermal resistivity.
Embodiment three: as shown in Figures 2 and 3, the ring-type supporting construction of pipe thin-walled portion in the embodiment three described micro metal Dewars is made of upper support ring 1, lower support ring 2 and the reinforcement 3 that connects upper and lower support ring.Upper support ring 1 is parallel and coaxial with lower support ring 2.The reinforcement quantity that connects upper and lower support ring is 6, and is 60
oEven distribution; The cross-sectional area of reinforcement 3 is for being equal to or less than 0.16mm
2Ellipse; In order to guarantee that upper support ring 1 is positioned at the position that is no more than Dewar pipe 4 thin-walled portion length 2/3 from pipe root 8, make that managing 4 thin-walled portions in the Dewar has at least 1/3 length fully adiabatic, reinforcement 3 is 70 with the angle of upper and lower support ring
oReinforcement 3 is taked welding or bonding the connection with upper and lower support ring.The internal diameter of upper support ring 1 can cooperate with the crest clearance of pipe 4 thin-walled portions in the Dewar, the external diameter of lower support ring 2 can with the internal diameter clearance fit of Dewar shell 5, after being installed in the micro metal Dewar, upper support ring 1 welds or bonding the connection with the thin-walled portion of the interior pipe 4 of Dewar, and lower support ring 2 is welded to connect with Dewar shell 5.Upper support ring 1, lower support ring 2 and reinforcement 3 all adopt the bigger titanium alloy material Ti-2Al-2.5Zr of thermal resistivity.
The processing of the utility model ring-type supporting construction is undertaken by the manufacture craft requirement of electron tube, guarantees that its impermeability, surface treatment satisfy the vacuum needs, about interior hole dimension and tolerance must satisfy the practical engineering application requirement.
Claims (2)
1. the ring-type supporting construction of pipe thin-walled portion in the micro metal Dewar is characterized in that being made of upper support ring ⑴, lower support ring ⑵ and the reinforcement ⑶ that connects upper and lower support ring; The upper support ring is parallel and coaxial with the lower support ring; The reinforcement quantity that connects upper and lower support ring is 3 and above and 360
oEvenly distribute in the scope; The cross-sectional area of reinforcement is equal to or less than 0.16mm
2The angle of reinforcement and upper and lower support ring is between 20
oTo 70
oBetween; Reinforcement and upper and lower support ring are rigidly connected.
2. according to the ring-type supporting construction of pipe thin-walled portion in the described micro metal Dewar of claim 1, it is characterized in that in the micro metal Dewar that upper support ring ⑴ is positioned at the position that is no more than Dewar pipe ⑷ thin-walled portion length 2/3 from pipe root ⑻.
3. according to the ring-type supporting construction of managing thin-walled portion in the described micro metal Dewar of claim 1, the internal diameter that it is characterized in that upper support ring ⑴ can cooperate with the crest clearance of pipe ⑷ thin-walled portion in the Dewar, the external diameter of lower support ring ⑵ can with the internal diameter clearance fit of Dewar shell ⑸, after being installed in the micro metal Dewar, the thin-walled portion of pipe is rigidly connected in upper support ring and the Dewar, and lower support ring and Dewar shell are rigidly connected.
4. according to the ring-type supporting construction of pipe thin-walled portion in the described micro metal Dewar of claim 1, the xsect that it is characterized in that reinforcement ⑶ is rectangle, or circular, or oval.
5. according to the ring-type supporting construction of pipe thin-walled portion in the described micro metal Dewar of claim 1, it is characterized in that upper support ring ⑴, lower support ring ⑵ and reinforcement ⑶ all adopt the bigger titanium alloy material of thermal resistivity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001376 CN203203713U (en) | 2013-01-05 | 2013-01-05 | Annular supporting structure of inner tube thin-wall portion of micro metal dewar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320001376 CN203203713U (en) | 2013-01-05 | 2013-01-05 | Annular supporting structure of inner tube thin-wall portion of micro metal dewar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203203713U true CN203203713U (en) | 2013-09-18 |
Family
ID=49147812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320001376 Expired - Fee Related CN203203713U (en) | 2013-01-05 | 2013-01-05 | Annular supporting structure of inner tube thin-wall portion of micro metal dewar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203203713U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2930484A1 (en) | 2014-03-27 | 2015-10-14 | Semi Conductor Devices - An Elbit Systems - Rafael Partnership | Ruggedized dewar unit for integrated dewar detector |
| CN114235160A (en) * | 2021-12-21 | 2022-03-25 | 武汉高芯科技有限公司 | Dewar and infrared detector |
| CN114689178A (en) * | 2022-05-30 | 2022-07-01 | 武汉高芯科技有限公司 | Dewar cold finger supporting structure capable of resisting large-magnitude impact vibration and infrared detector |
-
2013
- 2013-01-05 CN CN 201320001376 patent/CN203203713U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2930484A1 (en) | 2014-03-27 | 2015-10-14 | Semi Conductor Devices - An Elbit Systems - Rafael Partnership | Ruggedized dewar unit for integrated dewar detector |
| US10222266B2 (en) | 2014-03-27 | 2019-03-05 | Semi Conductor Devices—An Elbit Systems-Rafael Partnership | Ruggedized dewar unit for integrated Dewar detector assembly |
| CN114235160A (en) * | 2021-12-21 | 2022-03-25 | 武汉高芯科技有限公司 | Dewar and infrared detector |
| CN114689178A (en) * | 2022-05-30 | 2022-07-01 | 武汉高芯科技有限公司 | Dewar cold finger supporting structure capable of resisting large-magnitude impact vibration and infrared detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20200105 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |