A method to improve the cooling capacity of large-scale thermal vacuum test
A technology of thermal vacuum test and capacity, applied in the direction of auxiliary controller with auxiliary heating device, using electric mode for temperature control, etc., can solve the difficulty in meeting the requirements of high temperature test, reduce the coverage factor, increase the consumption of liquid nitrogen power supply Power consumption and other issues, to achieve the effect of solving insufficient cooling capacity, improving cooling capacity, and increasing cooling rate
Active Publication Date: 2018-02-06
XIAN INSTITUE OF SPACE RADIO TECH
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although it can meet the requirements of some low-temperature tests by reducing the coverage factor of the heating belt, it is difficult to meet the requirements of the high-temperature test when the temperature is raised due to the reduction of the coverage factor; It is effective when it is greater than 50%, and it greatly increases the consumption of liquid nitrogen and the power consumption of the power supply under high temperature conditions
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0028] The invention relates to a method for improving the cooling capacity of a large-scale thermal vacuum test, the steps are as follows:
[0029] (1) Each heating belt of the heating cage is designed to be rotatable, and each heating belt is synchronously moved and positioned; the heating belt is made of stainless steel, one side is a black paint surface, and the other side is not painted;
[0030] (2) Put the test piece into the heating cage in step (1), push it into the vacuum chamber, and evacuate until the vacuum degree is ≤1.3×10 -3 Pa, compare the black paint surface to the test piece, such as figure 1 Shown; raise the temperature to the end of the high temperature hold;
[0031] (3) Start to cool down and control the heating belt to rotate 90 degrees, such as figure 2 As shown, (surface shading becomes line shading, reducing shading), cool down to the end of low temperature maintenance;
[0032] (4) Start to heat up, control the heating belt to rotate -90 degrees...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a method for improving the cooling capability of a large-scale heat vacuum test. The method comprises the following steps: 1, designing each heating tape of a heating cage to be in a rotatable form, and synchronously moving and positioning each heating tape, wherein one surface of each heating tape is a black paint surface; 2, installing test pieces into the heating cage in the first step, pushing to a vacuum chamber, performing vacuum-pumping to a vacuum degree smaller than and equal to 1.3*10<-3> Pa, enabling the black paint surfaces to face the test pieces, and increasing to a temperature until high-temperature maintenance ends; 3, starting cooling, controlling the heating tapes to rotate by 90 degrees, and reducing the temperature until low-temperature maintenance ends; and 4, starting to increase the temperature, controlling the heating tapes to rotate by -90 degrees, enabling the black paint surfaces to face the test pieces, recovering the heating function of the heating tapes, and repeating the third step to the fourth step until the test ends. A high temperature and a low temperature are set according to a highest temperature and a lowest temperature needed by the test pieces for test examination.
Description
technical field [0001] The invention is a method for improving the cooling capacity of a large-scale thermal vacuum test by rotating the heating belt of the heating cage, which can be applied to the thermal vacuum test of a large-scale antenna reflector of a spacecraft and a solar panel, and can improve the low temperature of the test while ensuring the high temperature requirement of the test Cooling rate and cooling capacity. Background technique [0002] At present, large-scale thermal vacuum tests mainly use infrared heating cages to simulate external heat flow to control the temperature of spacecraft antenna products. Radiation is used to control the temperature of the test antenna. With the continuous development of antenna simulation technology and the actual work requirements of the antenna in orbit, the low temperature requirements of the antenna for thermal vacuum tests are becoming more and more stringent. In the thermal vacuum test, due to insufficient cooling c...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G05D23/32
CPCG05D23/32
Inventor 柴继泽王学科左刚王志兵柏宏武杨晓敏代锋
Owner XIAN INSTITUE OF SPACE RADIO TECH