A pressure-loaded thermal shock test method for spacecraft thermal control stand-alone products
A technology of thermal shock and test method, applied in instruments, scientific instruments, measuring devices, etc., can solve problems such as hidden safety hazards and leakage of working fluids
Active Publication Date: 2017-03-15
BEIJING SATELLITE MFG FACTORY
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Problems solved by technology
At present, there is no simultaneous method and measure for thermal shock and pressure shock tests. In the past, in order to realize the simulation of this working condition, it is necessary to fill liquid ammonia working fluid according to the actual working state of the product. Because liquid ammonia is toxic, In the process of temperature and pressure shock, if there is a problem, the working medium will leak, and there are hidden dangers in the test process, so it is necessary to give an effective test method
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[0018] Taking the two-phase fluid circuit temperature and pressure shock test as an example, the test process is as follows:
[0019] 1. According to the thermal shock temperature T 1 =265°C, the shock pressure corresponds to the saturated vapor pressure of ammonia at 265°C as P 1 =5MPa, ambient temperature T 0 =20°C, the calculated filling pressure is 2.72MPa;
[0020] 2. The evaporator assembly should be filled with helium with the saturated vapor pressure of ammonia at 265°C, that is, 2.72Mpa, which is used to measure whether the weld seam leaks during the thermal shock test.
[0021] 3. Put the test components that have passed the delivery inspection into the high-temperature oven;
[0022] 4. Starting from room temperature (normal ambient temperature), the temperature of the test component is raised according to the temperature change rate, and the temperature change rate can be selected as a heating rate of 1.5°C / s to 4°C / s;
[0023] 5. After the temperature reaches ...
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The invention provides a pressure-loading cold and hot impact testing method of a spacecraft hot-control single-machine product. The pressure-loading cold and hot impact testing method comprises the following steps: converting filling pressure; feeding inert gas; carrying out sealing welding on a feeding opening; and checking feeding quality, carrying out a temperature cycle test, and evaluating a testing effect after the test. The hot-control single-machine product is internally filled with the inert gas so that the pressure in the hot-control single-machine product is changed along the change of a testing temperature, and the requirements of carrying out temperature impact and pressure impact at the same time are realized. The problems that a hot-control system which takes high-purity ammonia as a two-phase working medium is used for simulating an environment testing project of violent changes of the space environment, and carrying out the temperature impact and the pressure impact at the same time in actual space application are solved; and the model product testing perfectly meets a working condition and the testability of the product is improved.
Description
technical field [0001] The invention is used for the thermal shock test of a spacecraft thermal control stand-alone product, and belongs to the technical field of spacecraft environmental testing. Background technique [0002] The two-phase fluid circuit is a new type of spacecraft thermal control technology, and it is one of the few effective measures to solve the heat dissipation problem of military spacecraft with extremely high heat flux. In actual space applications, high-purity ammonia is used as the two-phase working fluid. Due to the drastic changes in the space environment, there are cases where the low-temperature liquid working medium enters the high-temperature components and rapidly heats up and gasifies. Due to the different saturated vapor pressure of the working medium at different temperatures, the circuit components need to experience temperature and pressure shock changes. [0003] In view of the characteristics of this working condition, it is necessary ...
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IPC IPC(8): G01N3/60
Inventor 赵健白燕苗建印邹丹张红星莫青
Owner BEIJING SATELLITE MFG FACTORY