CN107484266B - Infrared heating cage motion driving system in vacuum low-temperature environment - Google Patents
Infrared heating cage motion driving system in vacuum low-temperature environment Download PDFInfo
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- CN107484266B CN107484266B CN201710573340.7A CN201710573340A CN107484266B CN 107484266 B CN107484266 B CN 107484266B CN 201710573340 A CN201710573340 A CN 201710573340A CN 107484266 B CN107484266 B CN 107484266B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
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Abstract
The invention discloses an infrared heating cage motion driving system applied to a vacuum low-temperature environment, which consists of a power system, a transmission system, a control system and a thermal control system, wherein the power system realizes power output, the transmission system realizes motion control of an infrared heating cage, accurate positioning of the infrared heating cage is ensured according to feedback signals such as displacement, speed, limit and the like, and the transmission system realizes opening/closing motion of the heating cage. The control system can drive the motor to start and stop the mechanical system, integrates the functions of angle monitoring, limiting alarm and the like, and the thermal control system ensures that the power system is always kept in a normal working temperature range. The system can be extended and applied to realize the motion control of other sheet-shaped structure test pieces in the vacuum low-temperature environment.
Description
Technical Field
The invention belongs to the field of space environment simulation, and particularly relates to a driving system for movement of an infrared heating cage in a vacuum low-temperature environment.
Background
The vacuum low-temperature environment generally means that the vacuum degree is as high as 1 x 10 < -4 > Pa, and the temperature is as low as about 100K. At present, only an infrared heating cage motion mechanism which moves in an over-parallel mode exists in a vacuum low-temperature environment, and the mechanism requires a wide installation space and is suitable for long-distance linear motion. The infrared heating cage is required to be rotated to be opened/closed in situ in the narrow and small installation space.
The infrared heating cage motion driving system works in a vacuum low-temperature environment, and rotary opening/closing motion of the heating cage is achieved. The vacuum low-temperature environment puts a rigorous requirement on a motion driving system, a common driving system and a structure are difficult to work normally in the environment, and a similar application precedent is not provided at present in China. Meanwhile, the vacuum low-temperature environment also puts a strict requirement on the selection of components of the motion driving system, common motors, speed reducers, travel limit switches and the like cannot work in the low-temperature environment of 100K, and meanwhile, the components and parts should have low gas volatility in vacuum, and the selection of lubricants should also consider that the lubricants are not easy to volatilize, do not deteriorate and do not pollute the spacecraft and the like in vacuum. Therefore, in order to realize the motion driving of the infrared heating cage in the low-temperature vacuum environment, the development of a driving system is required to be performed in a targeted manner.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide an infrared heating cage motion driving system which is simple in structure and suitable for a vacuum low-temperature environment, realizes the accurate rotation opening/closing motion of a large infrared heating cage for a thermal test in the vacuum low-temperature environment, and can be extended and applied to realize the motion control of other sheet-shaped structure test pieces in the vacuum low-temperature environment.
The invention relates to an infrared heating cage motion driving system applied to a vacuum low-temperature environment, which comprises a power system, a transmission system, a control system and a thermal control system, wherein the power system provides power output and realizes motion control of an infrared heating cage through the transmission system; the motion control system realizes the start and stop of the infrared heating cage by a motor driven by a motion controller; the power system mainly comprises a stepping motor, a planetary reducer and a worm and gear reducer, wherein the stepping motor drives the worm and gear reducer meshed with the stepping motor to rotate through the planetary reducer and provides power output; the transmission system comprises a main body frame, a heating cage installation framework, a rotating shaft, a universal coupling and a plurality of limit sensors, and realizes the opening/closing movement of the infrared heating cage, the whole power system is arranged on a bottom plate of the main body frame, an output shaft of the worm gear reducer is connected with the vertical rotating shaft through the universal coupling, so as to drive the infrared heating cage installation framework fixedly connected with the rotating shaft and the infrared heating cage arranged on the framework to do rotating opening/closing movement, and the two limit sensors are respectively arranged on the main body frame corresponding to the infrared heating cage rotating limit position of 0 degree and 90 degrees; the thermal control system is formed by sticking a plurality of film heating sheets outside the stepping motor and the speed reducer and keeping the system within a working temperature range; the control system controls the power system and the heat control system, the power system drives the transmission system, and finally drives the infrared heating cage to move; the displacement, speed and limit signals of the infrared heating cage are fed back to the control system, the thermal control system controls the temperature of the power system and feeds the temperature back to the control system, and finally closed-loop control is formed.
The motion control part realizes the starting and stopping of all mechanical parts in the system by a motion controller driving motor, and is integrated with the functions of angle monitoring and limiting alarm.
Wherein, the vacuum low temperature environment means that the vacuum degree is as high as 1 multiplied by 10-4Pa, temperature about 100K minimum.
Wherein, the infrared heating cage is a sheet thin-wall structure, and the size range (length multiplied by width) is 1000mm multiplied by 1000 mm-3000 mm multiplied by 3000 mm.
Wherein, the film heating sheet is wrapped with a heat insulating material to reduce heat loss as much as possible and keep the working temperature of the system at 20 +/-10 ℃.
Furthermore, the heat insulation material adopts a reflecting screen with two sides plated with metal films, and a spacing material is arranged between the screens.
When the infrared heating cage motion driving system works in a vacuum low-temperature environment, the connection of an electric system between the vacuum low-temperature environment inside the equipment and an external atmospheric environment is realized through the vacuum connector.
Compared with the prior art, the infrared heating cage motion driving system has the following improvement effects:
(1) suitable for vacuum degree up to 1 × 10-4Pa, the lowest temperature reaches the motion requirement under the environment of about 100K;
(2) the device is suitable for infrared heating cages with different sizes;
(3) the rotating angle range of the heating cage is as follows: 0-90 degrees and can be continuously rotated; the time for completing each opening/closing action is not more than 5 min;
(4) high reliability, and continuous and stable operation for 30 days.
Drawings
FIG. 1 is a schematic diagram of a driving system for the movement of an infrared heating cage applied in a vacuum low temperature environment;
wherein, 1-a power system; 2-a transmission system; 3-a control system; 4-thermal control system.
FIG. 2 is a schematic diagram of an infrared heating cage motion driving system of the present invention applied in a vacuum cryogenic environment;
FIG. 3 is a diagram of a power system and a transmission system of the infrared heating cage motion driving system applied in a vacuum low temperature environment.
Wherein, 31-rotation axis; 32-limit sensor; 33-universal coupling; 34-worm gear reducer; 5-a body frame; 6-a step motor; 7-a planetary reducer; 8-a limit sensor; 9-installing a framework on the infrared heating cage; 10-infrared heating cage.
Detailed Description
The present invention will be described in further detail with reference to the attached drawings, which are only illustrative and not intended to limit the scope of the present invention in any way.
Referring to fig. 1, fig. 1 is a composition diagram of an infrared heating cage motion driving system applied to a vacuum low-temperature environment, and includes a power system 1, a transmission system 2, a control system 3 and a thermal control system 4, wherein the power system 1 provides power output and realizes motion control of an infrared heating cage through the transmission system 2, the control system 3 includes two parts, namely a temperature control system and a motion control system, and the temperature control system mainly sets a target temperature of the thermal control system and displays a current temperature and current application condition; the motion control system realizes the start and stop of infrared heating cages of all parts of the system by driving a motor through a motion controller; the thermal control system 4 is formed by sticking a plurality of film heating sheets on the outer parts of all the components of the power system and keeping the system in a working temperature range.
Fig. 2 shows a schematic diagram of the infrared heating cage motion driving system applied in a vacuum low-temperature environment of the present invention, wherein the control system is an operation and monitoring platform of the whole driving system, and comprises two parts, namely a temperature control system and a motion control system, wherein the temperature control system mainly sets a target temperature of the thermal control system and displays a current temperature and an applied current condition. The motion control system is composed of an Ethernet interface independent four-axis motion controller, a power supply, a control mode and the like, and can drive a motor to realize starting and stopping of a mechanical system and integrate the functions of angle monitoring, limiting alarm and the like. In addition, the driving system of the invention controls the power system and the transmission system through the control system to realize the motion control of the infrared heating cage, and ensures the accurate positioning, safety and reliability of the infrared heating cage according to the feedback signals of displacement, speed, limit and the like. Furthermore, the control system controls the power system and the heat control system, the power system drives the transmission system, and finally the infrared heating cage is driven to move; the displacement, speed and limit signals of the infrared heating cage are fed back to the control system; the thermal control system controls the temperature of the power system and feeds the temperature back to the control system, and finally a closed-loop control is formed.
Specifically, fig. 3 shows a structure diagram of a power system and a transmission system of an infrared heating cage motion driving system applied in a vacuum low-temperature environment according to an embodiment of the present invention. Wherein, be applied to infrared heating cage motion actuating system under vacuum low temperature environment includes: the power system and the transmission system, wherein the power system 1 comprises a worm gear reducer 34, a stepping motor 6 and a planetary reducer 7; the worm gear reducer 34, the stepping motor 6 and the planetary reducer 7 are respectively arranged on a main body frame 5 which is horizontally arranged in a transmission system, the transmission system comprises a limit sensor 32, a universal coupling 33, the main body frame 5, a limit sensor 8, an infrared heating cage mounting framework 9 and an infrared heating cage 10, wherein the power system 1 is arranged on a bottom plate of the main body frame 5, and an output shaft of the worm gear reducer 34 is connected with a rotating shaft 31 through the universal coupling 33 so as to drive the infrared heating cage mounting framework 9 and the infrared heating cage 10 to rotate to open/close; the limit sensors 32 and 8 are respectively installed on the main body frame 5 corresponding to 0 ° and 90 ° of the rotation limit position of the heating cage. The vacuum connector and the cable meet the use requirements in a vacuum low-temperature environment. The step motor is an inlet vacuum high-temperature resistant step motor, the planetary reducer is a matched vacuum reducer in the same factory, the working environment temperature is-20 to +200 ℃, and the vacuum degree can reach 10-7Pa; the worm gear reducer adopts a precisely-ground worm gear structure, the main body material is aluminum alloy, and meanwhile, the surface is anodized and blackened, so that the worm gear reducer can rotate in any forward direction and reverse direction and has extremely small backlash. The thermal control system is arranged between the stepping motor and the speed reducerA special film heating sheet and a platinum temperature measuring resistor are pasted outside, and heat insulation materials are wrapped to reduce heat loss as much as possible and keep the working temperature of the system at 20 +/-10 ℃. The film heater consists of a film heating sheet, a platinum resistor and a heat insulating material. The heat insulating material adopts a reflecting screen with two sides plated with metal films, and interval materials are arranged between the screens.
When the external heating cage motion driving system works in a vacuum low-temperature environment, the connection of an electric system between the vacuum low-temperature environment inside the equipment and an external atmospheric environment is realized through the vacuum connector. The vacuum connector and the cable meet the use requirements in a vacuum low-temperature environment. The control system comprises a heating power supply, a temperature controller and the like which are arranged in the external atmospheric environment, a computer is arranged in an operation room, and the infrared heating cage motion driving system is remotely controlled to work through software.
Although particular embodiments of the invention have been described and illustrated in detail, it should be understood that various equivalent changes and modifications can be made to the above-described embodiments according to the inventive concept, and that it is intended to cover such modifications as would come within the spirit of the appended claims and their equivalents.
Claims (7)
1. The infrared heating cage motion driving system applied to the vacuum low-temperature environment comprises a power system, a transmission system, a control system and a thermal control system, wherein the power system provides power output and realizes motion control of the infrared heating cage through the transmission system; the motion control system realizes the start and stop of the infrared heating cage by a motor driven by a motion controller; the power system mainly comprises a stepping motor, a planetary reducer and a worm and gear reducer, wherein the stepping motor drives the worm and gear reducer meshed with the stepping motor to rotate through the planetary reducer and provide power output; the transmission system comprises a main body frame, a heating cage installation framework, a rotating shaft, a universal coupling and a plurality of limit sensors, and realizes the opening/closing movement of the infrared heating cage, the whole power system is arranged on a bottom plate of the main body frame, an output shaft of the worm gear reducer is connected with the vertical rotating shaft through the universal coupling, so as to drive the infrared heating cage installation framework fixedly connected with the rotating shaft and the infrared heating cage arranged on the framework to do rotating opening/closing movement, and the two limit sensors are respectively arranged on the main body frame corresponding to the infrared heating cage rotating limit position of 0 degree and 90 degrees; the thermal control system is formed by sticking a plurality of film heating sheets outside the stepping motor and the speed reducer and keeping the system within a working temperature range; the control system controls the power system and the heat control system, the power system drives the transmission system, and finally drives the infrared heating cage to move; the displacement, speed and limit signals of the infrared heating cage are fed back to the control system, the thermal control system controls the temperature of the power system and feeds the temperature back to the control system, and finally closed-loop control is formed.
2. The driving system of claim 1, wherein the motion control part realizes the start and stop of each mechanical part in the system by the driving motor of the motion controller, and is integrated with the functions of angle monitoring and limit alarming.
3. The drive system of claim 1, wherein the vacuum low temperature environment is a vacuum degree of up to 1 x 10-4Pa, temperature about 100K minimum.
4. The drive system of claim 1, wherein the infrared heating cage is a thin-walled sheet structure having a length and width in the range of 1000mm x 1000mm to 3000mm x 3000 mm.
5. The drive system of any one of claims 1 to 4, wherein the film heater is wrapped with a thermal insulation material to minimize heat loss and maintain the system operating temperature at 20 ℃ ± 10 ℃.
6. A drive system according to any one of claims 1 to 4 wherein the thermally insulating material comprises reflective screens coated on both sides with a metal film, with a spacer material interposed between the screens.
7. The drive system of any one of claims 1 to 4, wherein when the infrared heating cage motion drive system operates in a vacuum cryogenic environment, the electrical connection between the vacuum cryogenic environment inside the device and the external atmospheric environment is achieved through a vacuum connector.
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| CN201710573340.7A CN107484266B (en) | 2017-07-14 | 2017-07-14 | Infrared heating cage motion driving system in vacuum low-temperature environment |
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| CN201710573340.7A CN107484266B (en) | 2017-07-14 | 2017-07-14 | Infrared heating cage motion driving system in vacuum low-temperature environment |
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| CN107484266B true CN107484266B (en) | 2021-01-05 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109018456B (en) * | 2018-06-28 | 2020-07-14 | 上海卫星工程研究所 | Thermal vacuum test external heat flow simulation method of high-orbit remote sensing satellite platform |
| CN111272291B (en) * | 2020-03-19 | 2021-10-08 | 中国科学院长春光学精密机械与物理研究所 | Large-stroke opening and closing device for low-temperature vacuum environment |
| CN111942622B (en) * | 2020-07-02 | 2021-12-14 | 航天科工空间工程发展有限公司 | Infrared heating cage |
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Non-Patent Citations (1)
| Title |
|---|
| 真空热试验红外加热笼运动驱动系统设计;孙兴华等;《装备环境工程》;20140430;第11卷(第2期);38-42,68 * |
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