CN110356591B - Heat insulation pad - Google Patents
Heat insulation pad Download PDFInfo
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- CN110356591B CN110356591B CN201910753900.6A CN201910753900A CN110356591B CN 110356591 B CN110356591 B CN 110356591B CN 201910753900 A CN201910753900 A CN 201910753900A CN 110356591 B CN110356591 B CN 110356591B
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- titanium alloy
- alloy cap
- cap
- polyimide
- temperature
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/52—Protection, safety or emergency devices; Survival aids
- B64G1/58—Thermal protection, e.g. heat shields
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G1/00—Cosmonautic vehicles
- B64G1/22—Parts of, or equipment specially adapted for fitting in or to, cosmonautic vehicles
- B64G1/66—Arrangements or adaptations of apparatus or instruments, not otherwise provided for
Abstract
The invention provides a heat insulation pad, which is positioned between a low-temperature component and a high-temperature component and comprises an upper titanium alloy cap, a polyimide column and a lower titanium alloy cap, wherein the structure can be realized by embedding the polyimide column into the upper titanium alloy cap and the lower titanium alloy cap, or can be realized by embedding the upper titanium alloy cap and the lower titanium alloy cap into the polyimide column, and the upper titanium alloy cap and the lower titanium alloy cap are fixedly connected through a screw, when the heat insulation pad is not stressed, a gap is reserved between the upper titanium alloy cap and the lower titanium alloy cap, and after the screw is screwed down according to 80% of pretightening force, the gap value between the upper titanium alloy cap and the lower titanium alloy cap is 0. The application discloses heat insulating mattress adopts titanium alloy and polyimide composite construction heat insulating mattress, provides rigidity through the titanium alloy, keeps structural dimension stable, provides the thermal resistance through polyimide and separation interface, finally realizes heat insulating mattress's big thermal resistance, high rigidity, high dimensional stability.
Description
Technical Field
The invention relates to the technical field of space thermal control, in particular to a heat insulation pad.
Background
The star sensor is a high-precision space attitude measuring device taking a fixed star as a reference system and taking a star space as a working object. In a surveying camera or a detailed survey camera, in order to improve the geometric positioning precision of a remote sensing image of a space camera, a star sensor needs to be integrally installed with the space camera. In order to ensure the measurement accuracy of the star sensor, the operating temperature level of the star sensor is required to be about 10 ℃, and the operating temperature level of the space camera is generally 20 ℃. Therefore, the installation interface of the star sensor and the camera needs to adopt heat insulation measures to ensure the respective temperature levels of the star sensor and the camera.
In general, in a space environment, a heat insulation pad made of a material with a low thermal conductivity is often used, and the materials of the heat insulation pad are titanium alloy, polyimide, glass fiber reinforced plastic and the like. The titanium alloy belongs to metal, is a common space optical machine structure material, and has high rigidity, good dimensional stability and slightly high heat conductivity coefficient. Polyimide and glass reinforced plastic have very low thermal conductivity, but low elastic modulus and poor dimensional stability. The star sensor and the heat insulation pad of the camera need to meet the heat insulation requirement on one hand, and need to provide enough rigidity and stability on the other hand, so that the pointing direction of the star sensor is ensured to be stabilized at the second level or even the sub-second level. The rigidity and the stability of the titanium alloy meet the requirements, but the heat insulation efficiency is low, and the target requirements are difficult to achieve in a limited space. The polyimide and the glass fiber reinforced plastic have poor rigidity and poor stability, and the requirement on the pointing stability of the star sensor is difficult to meet. Therefore, it is not suitable to use a single material heat insulating pad as the heat insulating pad between the star sensor and the camera in the conventional manner.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a heat insulation pad which adopts a titanium alloy and polyimide composite structure, provides rigidity through the titanium alloy, keeps the structural dimension stable, provides thermal resistance through polyimide and a separation interface, and finally realizes large thermal resistance, high rigidity and high dimensional stability of the heat insulation pad.
The object of the invention can be achieved by the following technical measures:
the invention provides a heat insulation pad, which is positioned between a low-temperature component and a high-temperature component and comprises an upper titanium alloy cap, a polyimide column and a lower titanium alloy cap, wherein the upper titanium alloy cap and the lower titanium alloy cap are U-shaped rotary bodies, the openings of the U-shaped rotary bodies are in butt joint and clearance fit during assembly, the polyimide column is embedded in an inner space formed by the upper titanium alloy cap and the lower titanium alloy cap, and threaded through holes are formed in the middle parts of the upper titanium alloy cap, the polyimide column and the lower titanium alloy cap;
the low-temperature assembly and the high-temperature assembly are respectively contacted with the upper titanium alloy cap and the lower titanium alloy cap, and threaded through holes are also formed in the low-temperature assembly and the high-temperature assembly;
the low-temperature assembly, the upper titanium alloy cap, the polyimide column, the lower titanium alloy cap and the high-temperature assembly are fixedly connected through the cooperation of screws and threaded through holes.
Further, the upper titanium alloy cap and the lower titanium alloy cap are in clearance fit, and the clearance is determined by calculation according to the pretightening force of the screw.
Further, the clearance is in a state that after the screw is screwed down according to 80% of pretightening force, the clearance value between the upper titanium alloy cap and the lower titanium alloy cap is 0.
The invention also provides another heat insulation pad which is positioned between the low-temperature component and the high-temperature component and comprises an upper titanium alloy cap, a polyimide column and a lower titanium alloy cap, wherein the polyimide column is hollow and cylindrical, the upper titanium alloy cap and the lower titanium alloy cap are T-shaped rotary bodies, the upper titanium alloy cap and the lower titanium alloy cap are embedded in the hollow interior of the polyimide column in a matched manner in a relative assembly clearance manner, the whole body is an I-shaped rotary body after assembly, and threaded through holes are formed in the middle parts of the upper titanium alloy cap and the lower titanium alloy cap;
the low-temperature assembly and the high-temperature assembly are respectively contacted with the upper titanium alloy cap and the lower titanium alloy cap, and threaded through holes are also formed in the low-temperature assembly and the high-temperature assembly;
the low-temperature assembly, the upper titanium alloy cap, the lower titanium alloy cap and the high-temperature assembly are fixedly connected through the matching of screws and threaded through holes.
Further, the maximum diameter of the T-shaped revolution body of the upper titanium alloy cap and the lower titanium alloy cap is equal to the outer diameter of the polyimide column.
Further, the upper titanium alloy cap and the lower titanium alloy cap are in clearance fit, and the clearance is determined by calculation according to the pretightening force of the screw.
Further, the clearance is in a state that after the screw is screwed down according to 80% of pretightening force, the clearance value between the upper titanium alloy cap and the lower titanium alloy cap is 0.
The invention also provides a heat insulation structure applied between the star sensor and the space camera, wherein a plurality of groups of heat insulation pads are uniformly arranged between the low-temperature component of the star sensor and the high-temperature component of the space camera.
Further, the number of the heat insulation mats is at least 3 groups.
The heat insulation pad provided by the invention combines the material advantages of titanium alloy and polyimide, adopts the heat insulation pad with the composite structure of titanium alloy and polyimide, provides rigidity through the titanium alloy, keeps the structural dimension stable, provides thermal resistance through the polyimide and a separation interface, and finally realizes the large thermal resistance, high rigidity and high dimensional stability of the heat insulation pad. The heat insulation pad is applied to the heat insulation structure between the star sensor and the space camera, so that the requirements that the star sensor and the space camera need to insulate heat and the pointing height of the star sensor relative to the space camera needs to be stable are met, the technical problem that the heat insulation pad made of a single material cannot give consideration to high heat insulation performance, high dimensional stability and high rigidity is solved, and the measuring precision of the star sensor and the geometric positioning precision of a remote sensing image of the space camera are improved. In addition, the heat insulation pad of this application still is applicable to other needs heat-insulating installation and has the occasion of precision requirements such as rigidity and dimensional stability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic structural view of an insulation mat (polyimide embedded in titanium alloy) according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of an insulation mat (titanium alloy embedded in polyimide) according to an embodiment of the present invention;
description of reference numerals: 1-a screw; 2-a cryogenic component; 3-mounting a titanium alloy cap; 4-a polyimide column; 5-lower titanium alloy cap; 6-high temperature component.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and do not limit the invention.
In order to make the description of the present disclosure more complete and complete, the following description is given for illustrative purposes with respect to the embodiments and examples of the present invention; it is not intended to be the only form in which the embodiments of the invention may be practiced or utilized. The embodiments are intended to cover the features of the various embodiments as well as the method steps and sequences for constructing and operating the embodiments. However, other embodiments may be utilized to achieve the same or equivalent functions and step sequences.
The invention provides a heat insulation pad, as shown in fig. 1, which is a schematic structural diagram of a heat insulation pad (polyimide is embedded in titanium alloy) according to an embodiment of the invention, and is located between a low-temperature component 2 and a high-temperature component 6, and comprises an upper titanium alloy cap 3, a polyimide column 4 and a lower titanium alloy cap 5, wherein the upper titanium alloy cap 3 and the lower titanium alloy cap 5 are U-shaped rotators, openings of the U-shaped rotators are butted and in clearance fit during assembly, the polyimide column 4 is embedded in an inner space formed by the upper titanium alloy cap 3 and the lower titanium alloy cap 5, and threaded through holes are formed in the middle parts of the upper titanium alloy cap 3, the polyimide column 4 and the lower titanium alloy cap 5;
the low-temperature component 2 and the high-temperature component 6 are respectively in contact with the upper titanium alloy cap 3 and the lower titanium alloy cap 5, and threaded through holes are also formed in the low-temperature component 2 and the high-temperature component 6;
the low-temperature component 2, the upper titanium alloy cap 3, the polyimide column 4, the lower titanium alloy cap 5 and the high-temperature component 6 are matched with the threaded through hole through screws 1 to realize fixed connection.
In this embodiment, the upper titanium alloy cap 3 and the lower titanium alloy cap 5 are in clearance fit, and the clearance is determined by calculation according to the pretightening force of the screw. The clearance is in a state that after the screw 1 is screwed down according to 80% pretightening force, the clearance value between the upper titanium alloy cap 3 and the lower titanium alloy cap 5 is 0. Therefore, the upper titanium alloy cap 3, the polyimide column 4 and the lower titanium alloy cap 5 can bear load together after the screw 1 is screwed down according to the pretightening force.
The invention also provides a heat insulation pad, as shown in fig. 2, a schematic structural diagram of the heat insulation pad (titanium alloy is embedded in polyimide) according to an embodiment of the invention is located between the low-temperature component 2 and the high-temperature component 6, and includes an upper titanium alloy cap 3, a polyimide column 4, and a lower titanium alloy cap 5, where the polyimide column 4 is a hollow cylinder, the upper titanium alloy cap 3 and the lower titanium alloy cap 5 are T-shaped rotators, the upper titanium alloy cap 3 and the lower titanium alloy cap 5 are embedded in the hollow interior of the polyimide column 4 in a relatively clearance fit manner, and the whole assembled body is an i-shaped rotator, and threaded through holes are formed in the middle parts of the upper titanium alloy cap 3 and the lower titanium alloy cap 5;
the low-temperature component 2 and the high-temperature component 6 are respectively in contact with the upper titanium alloy cap 3 and the lower titanium alloy cap 5, and threaded through holes are also formed in the low-temperature component 2 and the high-temperature component 6;
the low-temperature component 2, the upper titanium alloy cap 3, the lower titanium alloy cap 5 and the high-temperature component 6 are fixedly connected through the matching of the screw 1 and the threaded through hole.
In the present embodiment, the maximum diameter of the T-shaped solid of revolution of the upper titanium alloy cap 3 and the lower titanium alloy cap 5 is equal to the outer diameter of the polyimide column. And the upper titanium alloy cap 3 and the lower titanium alloy cap 5 are in clearance fit, and the clearance is determined by calculation according to the pretightening force of the screw. Specifically, the clearance is set to be 0 after the screw 1 is tightened with 80% pre-tightening force. Therefore, the upper titanium alloy cap 3, the polyimide column 4 and the lower titanium alloy cap 5 can bear load together after the screw 1 is screwed down according to the pretightening force.
The invention also provides a heat insulation structure applied between the star sensor and the space camera, wherein a plurality of groups of heat insulation pads are uniformly arranged between the low-temperature component 2 of the star sensor and the high-temperature component 6 of the space camera. Specifically, the number of the heat insulation mats is at least 3 groups. When the heat insulation device is used, at least 3 heat insulation pads are installed between the low-temperature component 2 and the high-temperature component 6 which need to be heat insulated, and then screwed down through screws. The heat insulation pad has the dimensional stability of titanium alloy and the heat insulation efficiency of polyimide, has enough rigidity and dimensional stability while realizing small-space large-temperature-difference heat insulation, and solves the problem that the star sensor is installed on a camera in a heat insulation manner to reduce the measurement precision of the star sensor.
The heat insulation pad provided by the invention combines the material advantages of titanium alloy and polyimide, adopts the heat insulation pad with the composite structure of titanium alloy and polyimide, provides rigidity through the titanium alloy, keeps the structural dimension stable, provides thermal resistance through the polyimide and a separation interface, and finally realizes the large thermal resistance, high rigidity and high dimensional stability of the heat insulation pad. The heat insulation pad is applied to the heat insulation structure between the star sensor and the space camera, so that the requirements that the star sensor and the space camera need to insulate heat and the pointing height of the star sensor relative to the space camera needs to be stable are met, the technical problem that the heat insulation pad made of a single material cannot give consideration to high heat insulation performance, high dimensional stability and high rigidity is solved, and the measuring precision of the star sensor and the geometric positioning precision of a remote sensing image of the space camera are improved. In addition, the heat insulation pad of this application still is applicable to other needs heat-insulating installation and has the occasion of precision requirements such as rigidity and dimensional stability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (4)
1. A heat insulation pad is positioned between a low-temperature component and a high-temperature component and is characterized by comprising an upper titanium alloy cap, a polyimide column and a lower titanium alloy cap, wherein the upper titanium alloy cap and the lower titanium alloy cap are U-shaped rotary bodies, openings of the U-shaped rotary bodies are in butt joint and clearance fit during assembly, the polyimide column is embedded in an inner space formed by the upper titanium alloy cap and the lower titanium alloy cap, and threaded through holes are formed in the middle parts of the upper titanium alloy cap, the polyimide column and the lower titanium alloy cap;
the low-temperature assembly and the high-temperature assembly are respectively contacted with the upper titanium alloy cap and the lower titanium alloy cap, and threaded through holes are also formed in the low-temperature assembly and the high-temperature assembly;
the low-temperature assembly, the upper titanium alloy cap, the polyimide column, the lower titanium alloy cap and the high-temperature assembly are fixedly connected through the matching of screws and threaded through holes;
the upper titanium alloy cap and the lower titanium alloy cap are in clearance fit;
the clearance state is that after the screw is screwed down according to 80% pretightening force, the clearance value between the upper titanium alloy cap and the lower titanium alloy cap is 0.
2. A heat insulation pad is positioned between a low-temperature component and a high-temperature component and is characterized by comprising an upper titanium alloy cap, a polyimide column and a lower titanium alloy cap, wherein the polyimide column is hollow and cylindrical, the upper titanium alloy cap and the lower titanium alloy cap are T-shaped rotary bodies, the upper titanium alloy cap and the lower titanium alloy cap are embedded in the hollow interior of the polyimide column in a clearance fit manner, the whole body is an I-shaped rotary body after assembly, and threaded through holes are formed in the middle parts of the upper titanium alloy cap and the lower titanium alloy cap;
the low-temperature assembly and the high-temperature assembly are respectively contacted with the upper titanium alloy cap and the lower titanium alloy cap, and threaded through holes are also formed in the low-temperature assembly and the high-temperature assembly;
the low-temperature assembly, the upper titanium alloy cap, the lower titanium alloy cap and the high-temperature assembly are fixedly connected through the matching of screws and threaded through holes;
the maximum diameter of the T-shaped revolution body of the upper titanium alloy cap and the lower titanium alloy cap is equal to the outer diameter of the polyimide column;
the upper titanium alloy cap and the lower titanium alloy cap are in clearance fit, and the clearance is in a state that after the screw is screwed down according to 80% of pretightening force, the clearance value between the upper titanium alloy cap and the lower titanium alloy cap is 0.
3. A heat insulating structure applied between a star sensor and a space camera, characterized in that a plurality of groups of heat insulating mats as claimed in any one of claims 1-2 are uniformly arranged between a low-temperature component of the star sensor and a high-temperature component of the space camera.
4. The insulation structure according to claim 3, wherein the number of the insulation mats is at least 3 groups.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910753900.6A CN110356591B (en) | 2019-08-15 | 2019-08-15 | Heat insulation pad |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910753900.6A CN110356591B (en) | 2019-08-15 | 2019-08-15 | Heat insulation pad |
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| CN110356591A CN110356591A (en) | 2019-10-22 |
| CN110356591B true CN110356591B (en) | 2021-07-16 |
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| CN201910753900.6A Active CN110356591B (en) | 2019-08-15 | 2019-08-15 | Heat insulation pad |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR3135451A1 (en) * | 2022-05-16 | 2023-11-17 | Airbus Defence And Space Sas | Thermoregulated space equipment with thermally insulating mechanical support |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111409814B (en) * | 2020-03-02 | 2021-09-14 | 北京空天技术研究所 | Thermal bridge blocking structure for aircraft and preparation method thereof |
| CN112895611B (en) * | 2021-02-19 | 2023-04-18 | 航天科工空间工程发展有限公司 | Satellite structure cabin board |
| CN114180104A (en) * | 2021-12-30 | 2022-03-15 | 中国科学院长春光学精密机械与物理研究所 | High-precision temperature control device of space optical remote sensing satellite star sensor |
| CN115636112A (en) * | 2022-12-23 | 2023-01-24 | 中国科学院长春光学精密机械与物理研究所 | Multilayer heat insulation assembly fixing structure |
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| CN105122966B (en) * | 2011-10-18 | 2014-09-10 | 上海卫星工程研究所 | For the heat insulation connecting device between spatial metal surface |
| CN105667837A (en) * | 2015-09-15 | 2016-06-15 | 大连理工大学 | Pyramid micro-truss laminboard type bearing and thermal protection integrated structure containing runners |
| CN106428642A (en) * | 2016-08-16 | 2017-02-22 | 北京空间飞行器总体设计部 | Open type circular truncated cone-shaped thermal insulation devices for spacecraft thrusters |
| CN108528760A (en) * | 2018-03-12 | 2018-09-14 | 上海卫星工程研究所 | A kind of satellite top plate fining thermal design device |
| CN207945415U (en) * | 2017-12-29 | 2018-10-09 | 江苏腾利特种纤维科技有限公司 | Ceramic fibre heat insulating mattress |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6712318B2 (en) * | 2001-11-26 | 2004-03-30 | The Boeing Company | Impact resistant surface insulation tile for a space vehicle and associated protection method |
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| CN105122966B (en) * | 2011-10-18 | 2014-09-10 | 上海卫星工程研究所 | For the heat insulation connecting device between spatial metal surface |
| CN105667837A (en) * | 2015-09-15 | 2016-06-15 | 大连理工大学 | Pyramid micro-truss laminboard type bearing and thermal protection integrated structure containing runners |
| CN106428642A (en) * | 2016-08-16 | 2017-02-22 | 北京空间飞行器总体设计部 | Open type circular truncated cone-shaped thermal insulation devices for spacecraft thrusters |
| CN207945415U (en) * | 2017-12-29 | 2018-10-09 | 江苏腾利特种纤维科技有限公司 | Ceramic fibre heat insulating mattress |
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| FR3135451A1 (en) * | 2022-05-16 | 2023-11-17 | Airbus Defence And Space Sas | Thermoregulated space equipment with thermally insulating mechanical support |
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