CN111942622B - Infrared heating cage - Google Patents
Infrared heating cage Download PDFInfo
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- CN111942622B CN111942622B CN202010625732.5A CN202010625732A CN111942622B CN 111942622 B CN111942622 B CN 111942622B CN 202010625732 A CN202010625732 A CN 202010625732A CN 111942622 B CN111942622 B CN 111942622B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64G—COSMONAUTICS; VEHICLES OR EQUIPMENT THEREFOR
- B64G7/00—Simulating cosmonautic conditions, e.g. for conditioning crews
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Abstract
The embodiment of the invention discloses an infrared heating cage, which is configured to radiatively heat a test piece positioned in the infrared heating cage, and comprises: the cage body is used for placing a test piece and comprises a hollow part; the rotatable blade is positioned at the hollow part and emits infrared radiation in a power-on state; the blades matched with the hollow parts are arranged in the hollow parts and shield the hollow parts; the blades are configured to form a shield for the hollow part by rotating at different angles. According to the infrared heating cage provided by the embodiment of the invention, different shielding states of the infrared heating cage are rapidly adjusted through the blades with different rotation angles, so that the rapid switching between different temperature working conditions such as high temperature and low temperature is realized, and the rapid adjustment of the shielding coefficient of the infrared heating cage is realized.
Description
Technical Field
The invention relates to the field of design of spacecraft thermal environment test simulation devices. And more particularly to an infrared heating cage.
Background
At present, satellite mapping and satellite communication technologies have wide application requirements in military fields and commercial fields, and the severe operating environment puts high requirements on the adaptability of the whole satellite and the load to the space thermal environment. Therefore, in order to ensure that the temperature level, gradient and stability of the satellite and the key load thereof meet the normal working requirements, the thermal design and the thermal test become the key of the whole satellite research and development link.
At present, a simulation device for heat flow outside a space orbit in a ground thermal simulation test of a spacecraft is provided with: solar simulator, infrared heater, contact electric heater. The infrared heating cage in the infrared heater becomes a commonly used external heat flow simulation device by comprehensively considering factors such as cost, effect, test period and the like. The existing commonly used infrared heating cage is mainly composed of a metal heating belt fixed on a frame, and has the advantages of simple design principle, low structural complexity, high working reliability and the like; meanwhile, due to the characteristic of large thermal inertia of the infrared heating cage, when a low-temperature working condition test is needed, the heat dissipation speed of a test piece in the infrared heating cage is extremely low, and the low-temperature requirement after the temperature is reduced cannot be met, so that when the thermal radiation test is carried out, the infrared heating cage is difficult to rapidly switch different temperature working conditions, the environmental simulation errors of the infrared heating cage under different temperature working conditions are overlarge, and the accuracy of an experimental result is seriously influenced.
Therefore, a new infrared heating cage is needed.
Disclosure of Invention
The invention aims to provide an infrared heating cage to solve at least one problem in the prior art;
in order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides an infrared heating cage configured to radiatively heat a test piece positioned within the infrared heating cage, the infrared heating cage comprising:
the cage body is used for placing a test piece and comprises a hollow part; and
a rotatable blade located at the hollowed-out portion, the blade emitting infrared radiation in an energized state;
the blades matched with the hollow parts are arranged in the hollow parts and shield the hollow parts;
the blades are configured to form a shield for the hollow part by rotating at different angles.
In an alternative embodiment, the infrared heating cage comprises thereon:
the rack is vertically arranged and can move along the vertical direction;
the motor is used for driving the rack to move;
the worm is transversely arranged and is orthogonal to the rack, and the worm rotates by taking the axis of the worm as a rotating center under the driving of the rack; and
the worm enables the blades to rotate by taking the axis of the blade as a rotation center through a worm wheel matched with the worm.
In an optional embodiment, the infrared heating cage further comprises an aluminum foil plate vertically disposed outside the worm gear, the aluminum foil plate being configured to shield an exposed gap formed between the cage body and the blade end.
In an alternative embodiment, the blades are arranged in a louver structure, each blade rotates simultaneously with a rotation shaft arranged on a symmetry axis of the blade as a rotation center, and at least one end of the rotation shaft is connected with a worm wheel.
In an alternative embodiment, the length of the blade is smaller than that of the rotating shaft, and a spring sleeved on the rotating shaft is arranged between the end of the blade and the worm wheel.
In an alternative embodiment, an insulating member is disposed between the spring and the worm wheel and sleeved on the rotating shaft.
In an alternative embodiment of the method of the present invention,
under the high-temperature working condition, the blade completely shields the hollow part, and under the high-temperature working condition, the infrared heating cage carries out thermal radiation test on the test piece;
under the low temperature operating mode, the blade perpendicular to the plane of fretwork portion place, under this state, infrared heating cage is right the test piece carries out the thermal radiation test.
In an optional embodiment, different shielding states of the blades for the hollow part are formed by adjusting the rotation angle of the blades, and the infrared heating cage performs thermal radiation tests on the test piece under different temperature working conditions under the different shielding states.
In an alternative embodiment, the hollowed-out portion comprises an upper hollowed-out portion and a lower hollowed-out portion,
an upper blade capable of completely shielding the upper hollow part is arranged in the upper hollow part; the lower hollow part is internally provided with a lower blade which can completely shield the lower hollow part;
the upper blade and the lower blade rotate simultaneously at the same angle.
The invention has the following beneficial effects:
according to the infrared heating cage provided by the embodiment of the invention, different shielding states of the infrared heating cage are rapidly adjusted through the blades with different rotation angles, so that the rapid switching between different temperature working conditions such as high temperature and low temperature is realized, and the rapid adjustment of the coefficient of the infrared heating cage is realized.
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 description of the embodiments will be briefly introduced 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 based on these drawings without creative efforts.
FIG. 1 is an isometric view of an infrared heating cage assembly (fully shielded heating state) provided by an embodiment of the present invention;
FIG. 2 illustrates the positional relationship of the components of an infrared heating cage provided by an embodiment of the present invention;
FIG. 3 is a schematic diagram of a heating structure according to an embodiment of the present invention under a high temperature condition;
FIG. 4 is a schematic diagram of a heating structure provided by an embodiment of the invention under a low-temperature working condition;
FIG. 5 is a schematic view of an assembly of an insulator, a spring and a blade provided by an embodiment of the invention;
reference numerals: a cage body 1; a hollow-out portion 2; a blade 3; a rotating shaft 31; a rack 4; the transmission gear 41; a motor 5; a worm 6; a worm wheel 7; an aluminum foil plate 8; a spring 9; an insulating member 10.
Detailed Description
In order to more clearly illustrate the invention, the invention is further described below with reference to preferred embodiments and the accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
In view of the limitation that the infrared heating cage knot in the prior art cannot be rapidly switched between different temperature working conditions such as high temperature and low temperature, as shown in fig. 1 and 4, an embodiment of the present invention discloses an infrared heating cage configured to radiatively heat a test piece located in the infrared heating cage, the infrared heating cage including:
the test device comprises a cage body 1 for placing a test piece, wherein the cage body 1 comprises a hollow part 2; and
the rotatable blade 3 is positioned at the hollow part 2, and the blade 3 radiates heat to the test piece in an electrified state;
the blades 3 matched with the hollow parts 2 are arranged in the hollow parts and shield the hollow parts 3;
the blades 3 are configured to form a shield for the hollow portion 2 by rotating at different angles.
When a thermal test is carried out, the infrared heating cage is positioned in a vacuum tank (vacuum and low-temperature environment), and under the low-temperature working condition, if the shielding of cage blades is overlarge, the temperature of an internal test piece can not be reduced. According to the infrared heating cage provided by the embodiment of the invention, different shielding states of the infrared heating cage are rapidly adjusted through the blades with different rotation angles, so that the rapid switching between different temperature working conditions such as high temperature and low temperature is realized, and the rapid adjustment of the shielding coefficient of the infrared heating cage is realized.
In one specific example, the blades in the embodiment of the invention can be used for heating by electrifying and radiating heat to the outside so as to carry out a thermal radiation test on a test piece placed in the cage. According to the infrared heating cage provided by the embodiment of the invention, the cage body is provided with the hollow part, and the blades arranged in the hollow part can form shielding in different states by rotating at different angles, so that when the blades rotate at different angles, the shielding coefficients of the blades on a test piece in the cage can be quickly changed to realize quick adjustment of different temperature working conditions, and radiation with different intensities is formed by adjusting the current of the blades, so that the infrared heating cage can realize quick switching of different radiation intensities and different temperature working conditions.
As shown in fig. 1, in some optional implementations of this embodiment, the infrared heating cage includes:
the rack 4 is vertically arranged, and the rack 4 can move along the vertical direction;
a motor 5 for driving the rack 4 to move;
the worm 6 is transversely arranged and is orthogonal to the rack 4, and the worm 6 is driven by the rack 4 to rotate by taking the axis of the worm as a rotation center; and
the worm 6 rotates the vane 3 about its axis as a rotation center by a worm wheel 7 fitted to the worm 6.
In a specific example, the rack 4 in this embodiment is a direct-acting rack, and the worm 7 can be rotated about its own axis by means of a pinion 41 that is engaged with the rack 4. Since the worm wheel 7 is driven by the fitting relation with the worm 6; the worm 7 is fixedly connected with the transmission gear, and the rack, the worm and the worm wheel are sequentially driven under the driving of the motor 5 through the matching relation with the direct-acting rack 4, and finally the rotation of the blade 3 is realized. The matching relationship of the kinematic pairs is the same, so that the rotation of the blade 3 is stable and reliable.
In a specific example, the laterally arranged worm 6 is rotated around a worm axis as a rotation center by the drive gear 41;
the worm wheel 6 is driven by the worm 7 to rotate by taking the axis of the worm wheel as a rotating center;
each blade 3 is driven by each worm wheel 6 corresponding to the blade to rotate around its own axis as a rotation center.
In some optional implementation manners of the embodiment, under a high-temperature working condition, the blade completely shields the hollow part, and in this state, the infrared heating cage performs a thermal radiation test on the test piece;
under the low temperature operating mode, the blade perpendicular to the plane of fretwork portion place, under this state, infrared heating cage is right the test piece carries out the thermal radiation test.
In some optional implementation manners of the embodiment, the rotation angle of the blade is adjusted to form different shielding states of the hollow part, and the infrared heating cage performs thermal radiation tests on the test piece under different temperature working conditions in different shielding states.
In a specific example, under a low-temperature working condition as shown in fig. 4, the rotation angle of the blades 3 is 90 °, the rotation angle can enable each blade 3 to rotate from a current plane to another plane orthogonal to the current plane, all the blades 3 rotate until the narrow sides of the blades 3 face the direction of the test piece (the adjacent blades 3 are in a large gap state), at this time, the blades 3 shield the hollow portion almost to zero, the radiation area of the test piece in the cage, which is subjected to the infrared radiation of the blades 3, is the smallest, and the shielding of the blades 3 to the hollow portion 2 is the smallest (the shielding coefficient is about zero) in this state. In this case, the heat dissipation resistance of the high-temperature test piece to the liquid nitrogen heat sink in the vacuum tank is the minimum.
In a specific example, under a high-temperature working condition as shown in fig. 3, the blade 3 does not rotate and completely shields the hollow part 2 (a small gap state is formed between adjacent blades 3), the radiation area of the infrared radiation of the blade 3 on the test piece in the cage is the largest, the shielding of the blade 3 on the hollow part 2 is the largest in this state, and the blade 3 after being electrified carries out a thermal radiation test on the test piece in the heating cage under full coverage. Under the condition, the heat dissipation resistance of the high-temperature test piece to the liquid nitrogen heat sink in the vacuum tank is the largest.
In the two examples, the thermal radiation tests under two working conditions of high temperature and low temperature can be switched rapidly by adjusting the rotating angle of the blade 3. Because the rotation angle of blade 3 can be adjusted, consequently can realize switching different temperature operating modes fast, the problem that traditional heating cage thermal inertia is big has been solved to the pertinence, has increaseed the cooling speed and the cooling degree of test piece.
Because the rotation angle of the blade depends on the rack, the worm wheel and the motor which drive the blade to rotate, the rotation angle of the blade can be adjusted by adjusting the rotation frequency of the motor, and the size of the heat flow directly radiated by the test piece in the cage can be adjusted.
In some optional implementations of the present embodiment, the infrared heating cage further includes an aluminum foil plate 8 vertically disposed outside the worm wheel 7, and the aluminum foil plate 8 is configured to shield an exposed gap formed between the cage body 1 and the blade end 3. As shown in fig. 5, the aluminum foil plate is disposed on the outer side. As can be seen from the exemplary embodiment shown in fig. 5, an exposed gap is formed between the cage 1 and the blade ends 3, which can lead to uneven irradiation of the test piece by the blades 3. Therefore, in this embodiment, the aluminum foil plates 8 are arranged in the exposure gap, so that the thermal interference between the heating surfaces of the heating cage can be reduced, and meanwhile, the radiation heat of the blades is reflected to the corner position of the tested spacecraft (satellite) in the infrared heating cage, namely the edge of the star body, so that the heat flow at the edge of the star body is further enhanced, and the uniformity of the heat flow on the surface of the test piece can be effectively improved.
In one particular example, the aluminum foil plate may be a mirror aluminum foil.
In some optional implementations of this embodiment, the blades are arranged in a louver structure, and each blade rotates simultaneously with a rotation axis arranged on a symmetry axis of the blade as a rotation center, and at least one end of the rotation axis is connected to the worm wheel.
In some optional implementations of this embodiment, the blade 3 includes a plurality of sub-blades arranged in parallel at the same distance, each sub-blade is connected to a corresponding worm wheel 7, and the axis of the sub-blade and the axis of the worm wheel 7 are in the same direction. At least one end of the rotating shaft of the blade 3 is connected with the worm wheel 7.
As shown in fig. 3-5, each sub-vane is vertically arranged, the whole vane 3 is in a louver structure, the axis of the vane 3 corresponding to the axis of the worm wheel 7 is the same axis, and in this arrangement, the vane 3 is driven by the worm wheel 7 to rotate around the axis thereof in the vertical direction at a certain angle, so that the switching between different states as shown in fig. 3 and 4 can be realized.
In some alternative implementations of this embodiment, as shown in fig. 5, the length of the blade is smaller than the length of the rotating shaft, and a spring 9 sleeved on the rotating shaft is arranged between the blade end 3 and the worm wheel 7.
In the vertical direction, the length of the blade 3 is smaller than that of the rotating shaft so as to avoid friction collision between the blade 3 and a worm wheel 7 connected with the end part of the blade, and a spring 9 sleeved on the rotating shaft is arranged between the end part 3 of the blade and the worm wheel 7 so as to reduce structural thermal deformation caused by alternation of thermal environments.
In some optional implementations of this embodiment, an insulator 10 is disposed between the spring and the worm gear and sleeved on the rotating shaft. Insulation 10 is provided to electrically insulate the blades 3 from the cage 1. The material of the insulating member 10 may be selected from teflon.
In some optional implementations of this embodiment, the hollowed-out portion includes an upper hollowed-out portion and a lower hollowed-out portion,
an upper blade capable of completely shielding the upper hollow part is arranged in the upper hollow part; the lower hollow part is internally provided with a lower blade which can completely shield the lower hollow part;
the upper blade and the lower blade rotate simultaneously at the same angle.
As shown in fig. 1, when the volume of the cage body is too large, the area and the weight of the blades shielding the hollow-out portions are also large, in order to reduce the rotation time of the blades, the hollow-out portions are split into an upper part and a lower part, and the upper blade and the lower blade shielding the upper hollow-out portion and the lower hollow-out portion are respectively arranged in the upper part and the lower part, so that the speed of switching different temperature working conditions is further increased.
In one example, as shown in fig. 1, a cage body 1 constitutes a supporting and fixing structure of the infrared heating cage of the embodiment, and a motor 5, a rack 4 and a worm 6; the worm wheel 7 is fixed on the cage body 1 to realize the fixed connection of all the structures of the whole infrared heating cage.
In one example, a plurality of universal wheels are also provided on the cage body 1 to enable movement of the infrared heating cage in various directions.
In the specific example shown in fig. 1, the infrared heating cage is a rectangular parallelepiped, but the embodiment of the present invention is not limited to this structure, and may be a triangular prism, a pentagonal prism, a hexagonal prism, or an irregular closed structure, but it is only necessary to ensure that the cage 1 internally places the test piece, and ensure that the blades of each face completely block the hollow part on the face, and there is no gap between the connections of each face, which has no influence on the blocking coefficient of the simulation test. The infrared heating cage provided by the embodiment of the invention eliminates the influence of the shielding coefficient in a ground thermal simulation test, improves the power density, improves the maximum radiation capacity of a single heating surface of the heating cage, and improves the test efficiency and the accuracy of the test result in the aspects of heat exchange strength and uniformity.
According to the invention, the heating structure is designed, so that the heating belt rotates in a shutter mode, the rotatable shutter type heating belt eliminates the consideration of the shielding coefficient of the heating belt in the design process, the external heat flow is increased to improve the power density, the maximum radiation capacity of a single heating surface of the heating cage is improved, meanwhile, full-coverage radiation heating and low-shielding cooling are realized, the working condition is expanded to realize a temperature range, and the test efficiency and the accuracy of the test result are improved in the aspects of heat exchange strength and uniformity.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all embodiments may not be exhaustive, and all obvious variations or modifications may be included within the scope of the present invention.
Claims (8)
1. An infrared heating cage, wherein the infrared heating cage is configured to radiatively heat a test piece positioned within the infrared heating cage, the infrared heating cage comprising:
the cage body is used for placing a test piece and comprises a hollow part; and
a rotatable blade located at the hollowed-out portion, the blade radiating heat to the test piece in an energized state;
the blades matched with the hollow parts are arranged in the hollow parts and shield the hollow parts;
the blades are configured to form shielding of the hollow part by rotating at different angles;
the infrared heating cage comprises:
the rack is vertically arranged and can move along the vertical direction;
the motor is used for driving the rack to move;
the worm is transversely arranged and is orthogonal to the rack, and the worm rotates by taking the axis of the worm as a rotating center under the driving of the rack; and
the worm enables the blades to rotate by taking the axis of the blade as a rotation center through a worm wheel matched with the worm.
2. The infrared heating cage of claim 1, further comprising an aluminum foil plate disposed vertically outside the worm gear, the aluminum foil plate configured to shield an exposed gap formed between the cage and the blade end.
3. The infrared heating cage of claim 1, wherein the blades are arranged in a louver configuration, each blade rotating simultaneously about a rotation axis disposed on a symmetry axis of the blade, at least one end of the rotation axis being connected to a worm gear.
4. The infrared heating cage of claim 3, wherein the length of the blade is less than the length of the rotating shaft, and a spring is disposed between the end of the blade and the worm gear and sleeved on the rotating shaft.
5. The infrared heating cage of claim 4, wherein an insulator is disposed between the spring and the worm gear and around the rotating shaft.
6. Infrared heating cage according to claim 1,
under the high-temperature working condition, the blade completely shields the hollow part, and under the high-temperature working condition, the infrared heating cage carries out thermal radiation test on the test piece;
under the low temperature operating mode, the blade perpendicular to the plane of fretwork portion place, under this state, infrared heating cage is right the test piece carries out the thermal radiation test.
7. The infrared heating cage of claim 1, wherein different shielding states of the blades for the hollow portion are formed by adjusting the rotation angle of the blades, and the infrared heating cage performs thermal radiation tests on a test piece under different temperature working conditions under the different shielding states.
8. The infrared heating cage of claim 1, wherein the hollowed-out portion comprises an upper hollowed-out portion and a lower hollowed-out portion,
an upper blade capable of completely shielding the upper hollow part is arranged in the upper hollow part; the lower hollow part is internally provided with a lower blade which can completely shield the lower hollow part;
the upper blade and the lower blade rotate simultaneously at the same angle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010625732.5A CN111942622B (en) | 2020-07-02 | 2020-07-02 | Infrared heating cage |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010625732.5A CN111942622B (en) | 2020-07-02 | 2020-07-02 | Infrared heating cage |
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| CN111942622A CN111942622A (en) | 2020-11-17 |
| CN111942622B true CN111942622B (en) | 2021-12-14 |
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| CN209301806U (en) * | 2018-09-21 | 2019-08-27 | 翟玉庭 | A kind of disease prevention chlorination equipment |
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| EP0092331B1 (en) * | 1982-03-30 | 1987-06-10 | Shuton, S.A. | Ball-screw rack device |
| CN107484266B (en) * | 2017-07-14 | 2021-01-05 | 北京卫星环境工程研究所 | Infrared heating cage motion driving system in vacuum low-temperature environment |
| CN108576844B (en) * | 2018-03-16 | 2024-01-23 | 青岛理工大学 | High-efficiency walnut shell breaking, kernel taking, shell and kernel separating automatic production system |
| CN209176940U (en) * | 2018-11-20 | 2019-07-30 | 中国空气动力研究与发展中心超高速空气动力研究所 | A kind of four-dimension regulating device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2326704Y (en) * | 1998-03-07 | 1999-06-30 | 赵之璇 | Noval door capable of regulating closure size |
| KR20130020471A (en) * | 2011-08-19 | 2013-02-27 | 엘지디스플레이 주식회사 | Two degree-of-freedom positioning robot manipulator using single servo motor |
| CN106275523A (en) * | 2015-06-11 | 2017-01-04 | 北京卫星环境工程研究所 | The rotatable infrared heating cage of venetian blind type |
| CN106394943A (en) * | 2016-10-12 | 2017-02-15 | 北京理工大学 | Infrared dynamic scene simulator capable of working in low-temperature vacuum environment |
| CN209301806U (en) * | 2018-09-21 | 2019-08-27 | 翟玉庭 | A kind of disease prevention chlorination equipment |
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| CN111942622A (en) | 2020-11-17 |
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