CN111897179B - Efficient heat dissipation device for movable part of space camera - Google Patents
Efficient heat dissipation device for movable part of space camera Download PDFInfo
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- CN111897179B CN111897179B CN202010861130.XA CN202010861130A CN111897179B CN 111897179 B CN111897179 B CN 111897179B CN 202010861130 A CN202010861130 A CN 202010861130A CN 111897179 B CN111897179 B CN 111897179B
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- heat
- movable part
- heat dissipation
- space camera
- dissipation device
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- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/55—Details of cameras or camera bodies; Accessories therefor with provision for heating or cooling, e.g. in aircraft
Abstract
The invention relates to a high-efficiency heat dissipation device for a movable part of a space camera, and belongs to the technical field of heat dissipation devices. The technical problems that in the prior art, the space camera moving part is high in absorption rate and heat absorption capacity, and continuous high-frequency motion is difficult to dissipate heat are solved. The heat dissipation device comprises heat-conducting glue, a graphite film, a heat-conducting ring, heat-conducting filler, an annular bracket, a piezoelectric driver and a radiator; the heat conduction ring is of an annular structure; the piezoelectric drive is in interference fit with the heat conducting ring; the annular bracket consists of a fixed sleeve and a fixed seat; the graphite film is fixedly connected with the back of the movable part and the outer wall of the fixed sleeve through heat conducting glue. The heat dissipation device has the advantages of strong heat dissipation capability, high heat dissipation speed, high heat dissipation efficiency and high reliability, and can not influence the high-frequency motion function of the movable part, so that the movable part can continuously and stably work for a long time and can directionally detect in real time.
Description
Technical Field
The invention belongs to the technical field of heat dissipation devices, and particularly relates to a high-efficiency heat dissipation device for a movable part of a space camera.
Background
With the gradual exploration and deep research of the space camera on deep space, the requirement for large heat dissipation of the camera is correspondingly improved. Particularly, some important moving parts in the space camera are affected by external heat flow of solar radiation, earth infrared radiation and earth back illumination, and sometimes the temperature of the moving parts of the space camera is increased quickly by an internal heat source of the space camera, so that the heat dissipation requirement is increased, and therefore necessary heat dissipation measures are required to be adopted to dissipate the heat of the moving parts of the space camera.
The surface of the movable part is coated with the high-emissivity coating, and heat is dissipated to a cold and black space (the background temperature is 4K) in a radiation heat dissipation mode, so that the heat dissipation mode is good in effect. However, when the surface coating of the camera movable part is directly irradiated by sunlight or the internal heat source is large, the heat of the movable part needs to be connected with the radiator for heat dissipation in a heat conduction mode between the assemblies, so that the radiation heat dissipation area of the movable part is increased, the heat dissipation capacity is enhanced, and the temperature of the movable part does not exceed the allowable temperature during working. There is a need for a reasonable material selection and structural layout for the thermal conduction assembly of the moving parts of the space camera.
In the prior art, an aluminum alloy frame is usually used to support and fix each component of the camera, and the radiator is connected to conduct heat to the radiator through the aluminum alloy frame. The structure has a good heat dissipation effect for the camera fixing component, but for the movable part which needs real-time directional detection and moves all the time, because the contact area between the movable part and the supporting structure is small, and the movable part sometimes moves at high frequency, when the structure is used for dissipating heat of the movable part of the space camera, the whole temperature of the movable part is high, the real-time directional detection cannot be effective, and the influence of the environment temperature on the imaging quality of an optical system is increased.
Disclosure of Invention
In view of this, in order to solve the technical problems in the prior art that the space camera moving part has high absorption rate and large heat absorption capacity, and continuous high-frequency motion is difficult to dissipate heat, a high-efficiency heat dissipation device for the space camera moving part is provided.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
the efficient heat dissipation device for the movable part of the space camera comprises heat-conducting glue, a graphite film, a heat-conducting ring, heat-conducting filler, an annular bracket, a piezoelectric driver and a radiator;
the heat conduction ring is of an annular structure, three connecting bulges are arranged on the end face of one end of the heat conduction ring, the three connecting bulges are fixedly connected with the back of the movable part, and the annular bulges are arranged on the inner surface of the heat conduction ring;
one end of the piezoelectric driver is in interference fit with the heat conducting ring, the end face of the piezoelectric driver is contacted with the annular bulge, and the side wall of the piezoelectric driver is contacted with the inner surface of the heat conducting ring;
the annular bracket consists of a fixed sleeve and a fixed seat; the fixed sleeve is of a columnar structure with openings at two ends, is sleeved outside the piezoelectric driver, and is filled with heat conducting filler; the fixing seat is of an annular structure, the inner edge of the fixing seat is fixed along the outer edge of the port at one end of the fixing sleeve, the fixing seat is fixed on the radiator, and heat-conducting filler is filled between the fixing seat and the radiator;
the graphite film is respectively and fixedly connected with the back of the movable part and the outer wall of the fixed sleeve through heat conducting glue.
Further, the heat conduction ring is a circular ring, three connecting protrusions are evenly distributed on the circumference, the piezoelectric driver is cylindrical, the fixing sleeve is cylindrical, the fixing seat is a disc, and the fixing sleeve and the fixing seat are coaxially arranged.
Furthermore, the heat-conducting rings and the annular supports are made of invar steel.
Further, the material of the heat conducting filler is aluminum foil or indium foil.
Furthermore, a second through hole is formed in the fixing seat, and the fixing seat is fixedly connected with the radiator through a bolt.
Furthermore, the annular support is formed by assembling two branch supports, the branch supports are formed by axially sectioning the annular support, each branch support is provided with lug plates along two sections on the fixing sleeve, the lug plates are provided with first through holes, the lug plates of the two half fixing sleeves are contacted with each other in pairs, the first through holes are aligned, and the annular support is formed after the lug plates are fixed by bolts; furthermore, the heat conducting filler is filled between the two ear plates which are contacted.
Furthermore, the graphite film comprises a central sheet and N constructional sheets, one end of each constructional sheet is fixed to the outer edge of the central sheet, the N constructional sheets are arranged along the circumferential direction of the central sheet and radiate outwards with the central sheet as the center, the constructional sheets are folded inwards along the connection part of the central sheet and the constructional sheets, the outer wall of the central sheet is fixedly connected with the back of the movable part through heat-conducting glue, the inner wall of each constructional sheet is fixedly connected with the outer wall of the fixing sleeve through the heat-conducting glue, and N is larger than or equal to 3.
Further, the three coupling projections are projected from the gaps between the adjacent configuration pieces.
Further, the thermal conductivity of the graphite thin film is 1200W/(m.K).
Compared with the prior art, the invention has the beneficial effects that:
according to the efficient heat dissipation device for the movable part of the space camera, provided by the invention, heat generated by receiving environmental radiation and an internal heat source when the movable part works is transmitted to the radiator through the graphite film and the annular support in sequence and radiated to a cold black space. On one hand, the heat dissipation device adopts short path contact heat dissipation, and has the advantages of strong heat dissipation capacity, high heat dissipation speed, high heat dissipation efficiency and high reliability; on the other hand, because the working temperature of the movable part is effectively reduced, the high-frequency motion function of the movable part is not influenced, so that the movable part can continuously and stably work for a long time and can directionally detect in real time.
The high-efficiency heat dissipation device for the space camera movable part, provided by the invention, can change the thermal resistance of the graphite film by changing the thickness of the graphite film aiming at the movable part of the space camera with different flight tracks, so that the heat dissipation speed of the whole movable part is controlled, and the whole system meets the use requirements.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a longitudinal cross-sectional view of an efficient heat dissipation device for a movable part of a space camera provided by the present invention;
FIG. 2 is a sectional view taken along line A-A of FIG. 1;
FIG. 3 is a transverse cross-sectional view of an efficient heat sink for the moving parts of a space camera provided by the present invention;
FIG. 4 is a schematic structural diagram of a graphite film of the efficient heat dissipation device for a movable part of a space camera according to the present invention;
in the figure, 1, a movable part, 2, heat-conducting glue, 3, a graphite film, 4, a heat-conducting ring, 5, heat-conducting filler, 6, an annular support, 61, a fixing sleeve, 62, a fixing seat, 63, a first through hole, 64, a second through hole, 7, a piezoelectric driver, 8 and a radiator.
Detailed Description
For a further understanding of the invention, preferred embodiments of the invention are described below in conjunction with the detailed description, but it is to be understood that the description is intended to further illustrate the features and advantages of the invention and not to limit the claims to the invention.
As shown in fig. 1, the efficient heat dissipation device for the movable part of the space camera of the invention comprises a heat conduction glue 2, a graphite film 3, a heat conduction ring 4, a heat conduction filler 5, an annular bracket 6, a piezoelectric driver 7 and a radiator 8.
The heat conduction ring 4 is of an annular structure, three connecting protrusions are arranged on the end face of one end of the heat conduction ring, the three connecting protrusions are fixedly connected with the back of the movable part 1, and the inner surface of the heat conduction ring 4 is provided with the annular protrusions to form a step structure with the heat conduction blocks 4. Preferably, the material of the heat conducting ring 4 is metal, such as invar. Preferably, three connecting bulges are evenly distributed on the circumference.
The piezoelectric actuator 7 is an existing device and is commercially available. One end of the piezoelectric driver 7 is clamped in the step structure of the heat conducting ring 4, namely, one end of the piezoelectric driver 7 is in interference fit with the heat conducting ring 4, the end face of the piezoelectric driver 7 is in contact with the annular protrusion, and the side wall of the piezoelectric driver 7 is in contact with the inner surface of the heat conducting ring 4. Preferably the piezo actuator 7 is cylindrical.
The annular bracket 6 consists of a fixed sleeve 61 and a fixed seat 62; the fixed sleeve 61 is of a columnar structure with openings at two ends, is sleeved outside the piezoelectric driver 7, and the heat conducting filler 5 is filled between the fixed sleeve 61 and the piezoelectric driver 7; the fixing base 62 is of an annular structure, the inner edge of the fixing base is fixed along the outer edge of one end port of the fixing sleeve 61, the fixing base 62 is fixed on the radiator 8, and the heat conduction filler 5 is filled between the fixing base 62 and the radiator 8. Preferably, the retaining sleeve 61 is cylindrical and the retaining base 62 is a disk, both of which are coaxially disposed. Preferably, the fixing base 62 is provided with a second through hole 64, and the fixing base 62 is fixedly connected with the radiator 8 through a bolt. Preferably, the annular support 6 is formed by assembling two branch supports, the two branch supports are formed by axially sectioning the annular support 6, each branch support is provided with lug plates along two sections on the fixing sleeve 61, the lug plates are provided with first through holes 63, the lug plates of the two branch supports are contacted with each other in pairs, the first through holes 63 are aligned, and the annular support 6 is formed after the lug plates are fixed by bolts; furthermore, a heat conducting filler 5 is filled between the two ear plates which are in contact with each other. Preferably, the material of the ring support 6 is metal, such as invar. The ring support 6 on the one hand fixes the function of the piezo actuator 7 and on the other hand conducts the heat of the movable part 1 and the piezo actuator 7 to the radiator 8.
The graphite film 3 is fixedly connected with the back of the movable part 1 through the heat-conducting glue 2 and fixedly connected with the outer wall of the fixed sleeve 61 through the heat-conducting glue 2. Preferably, the graphite film 3 comprises a central sheet and N constructional sheets, one end of each constructional sheet is fixed to the outer edge of the central sheet, the N constructional sheets are arranged along the circumferential direction of the central sheet and radiate outwards with the central sheet as the center, the constructional sheets are folded inwards along the connection part of the central sheet and the constructional sheets, the outer wall of the central sheet is fixedly connected with the back of the movable part 1 through heat-conducting glue 2, the inner wall of each constructional sheet is fixedly connected with the outer wall of the fixing sleeve 61 through the heat-conducting glue 2, and N is more than or equal to 3. After the construction sheets are folded, the adjacent construction sheets can be connected or not connected, and the three connecting bulges can extend out of the graphite film 3 through gaps between the adjacent construction sheets and can also directly penetrate through the graphite film 3; when the annular support 6 has the ear plate, the ear plate is positioned between the gaps of two adjacent construction sheets. Preferably the central panel is a circular panel. The thermal conductivity of the graphite thin film 3 is preferably 1200W/(mK).
In the above technical solution, the heat conductive filler 5 is a metal foil, such as an aluminum foil or an indium foil, and an indium foil is usually selected.
It should be understood that the above embodiments are only examples for clearly illustrating the present invention, and are not intended to limit the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the spirit or scope of the invention.
Claims (10)
1. The efficient heat dissipation device for the movable part of the space camera is characterized by comprising heat-conducting glue (2), a graphite film (3), a heat-conducting ring (4), heat-conducting fillers (5), an annular bracket (6), a piezoelectric driver (7) and a radiator (8);
the heat conducting ring (4) is of an annular structure, three connecting bulges are arranged on the end face of one end of the heat conducting ring, the three connecting bulges are fixedly connected with the back of the movable part (1), and the annular bulges are arranged on the inner surface of the heat conducting ring (4);
one end of the piezoelectric driver (7) is in interference fit with the heat conducting ring, the end face of the piezoelectric driver (7) is in contact with the annular bulge, and the side wall of the piezoelectric driver (7) is in contact with the inner surface of the heat conducting ring (4);
the annular bracket (6) consists of a fixed sleeve (61) and a fixed seat (62); the fixed sleeve (61) is of a columnar structure with openings at two ends, is sleeved outside the piezoelectric driver (7), and heat conducting fillers (5) are filled between the fixed sleeve (61) and the piezoelectric driver (7); the fixing seat (62) is of an annular structure, the inner edge of the fixing seat (62) is fixed along the outer edge of one end port of the fixing sleeve (61), the fixing seat (62) is fixed on the radiator (8), and the heat conduction filler (5) is filled between the fixing seat (62) and the radiator (8);
the graphite film (3) is fixedly connected with the back of the movable part (1) and the outer wall of the fixed sleeve (61) through the heat-conducting glue (2).
2. The efficient heat dissipation device for the movable part of a space camera as claimed in claim 1, wherein the heat conduction ring (4) is a circular ring, three connecting protrusions are circumferentially and uniformly distributed, the piezoelectric driver (7) is cylindrical, the fixing sleeve (61) is cylindrical, and the fixing seat (62) is a disk, which are coaxially arranged.
3. The efficient heat dissipation device for the movable part of the space camera as claimed in claim 1, wherein the materials of the heat-conducting ring (4) and the ring support (6) are both invar.
4. The efficient heat dissipation device for the movable part of the space camera as claimed in claim 1, wherein the material of the heat conductive filler (5) is aluminum foil or indium foil.
5. The efficient heat dissipation device for the movable part of the space camera as claimed in claim 1, wherein the fixing base (62) is provided with a second through hole (64), and the fixing base (62) is fixedly connected with the radiator (8) through a bolt.
6. The efficient heat dissipation device for the movable part of the space camera as claimed in claim 1, wherein the annular support (6) is assembled by two branches, the branches are axially cut through the annular support (6), each branch is provided with an ear plate along two cut surfaces on the fixing sleeve (61), the ear plates are provided with first through holes (63), the ear plates of the two half fixing sleeves are contacted with each other, the first through holes (63) are aligned, and the annular support (6) is formed after being fixed by bolts.
7. The efficient heat dissipation device for the moving part of the space camera as claimed in claim 6, wherein the heat conducting filler (5) is filled between the two ear plates which are in contact.
8. The efficient heat dissipation device for the movable part of the space camera as claimed in claim 1, wherein the graphite film (3) comprises a central sheet and N constructional sheets, one end of each constructional sheet is fixed on the outer edge of the central sheet, the N constructional sheets are arranged along the circumferential direction of the central sheet and radiate outwards with the central sheet as the center, the constructional sheets are folded inwards along the joint of the central sheet and the constructional sheets, the outer wall of the central sheet is fixedly connected with the back part of the movable part (1) through the heat conduction glue (2), the inner wall of each constructional sheet is fixedly connected with the outer wall of the fixed sleeve (61) through the heat conduction glue (2), and N is more than or equal to 3.
9. The efficient heat sink for a movable part of a space camera as claimed in claim 8, wherein three connecting protrusions are protruded from the gap between the adjacent configuration pieces.
10. The efficient heat dissipating device for a movable part of a space camera according to claim 1, wherein the graphite film (3) has a thermal conductivity of 1200W/(m-K).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010861130.XA CN111897179B (en) | 2020-08-25 | 2020-08-25 | Efficient heat dissipation device for movable part of space camera |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010861130.XA CN111897179B (en) | 2020-08-25 | 2020-08-25 | Efficient heat dissipation device for movable part of space camera |
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| CN111897179A CN111897179A (en) | 2020-11-06 |
| CN111897179B true CN111897179B (en) | 2021-07-16 |
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| CN114895512B (en) * | 2022-06-09 | 2023-08-15 | 中国科学院长春光学精密机械与物理研究所 | Industrial camera conformal active and passive mixed cooling heat dissipation rear cover |
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