_ thermal vacuum test equipment of vacuum system

simulation experiment and vacuum environment in order to evaluate and study the effect of some of the moving parts, the tensile mechanism of dry friction, cold welding performance and sublimation, research materials in the vacuum condition, high vacuum of weight loss and aging and other space environment is required. The test is carried out under the joint action of many kinds of factors. It is well known that vacuum system has become more and more widely used in various industries. Here introduces the application of vacuum system in the thermal vacuum test equipment.

vacuum system used in semiconductor, integrated circuit and photoelectric device manufacturing process. Is one of the key equipment special equipment of integrated circuits; It is also used in a variety of other coating equipment and vacuum applications.

thermal vacuum test is under the condition of vacuum, and some temperature verify the various features of the spacecraft and its components and functional testing, including cold soak, hot dipping process and variable temperature. Environmental conditions is vacuum degree is better than that of 6. 5×10- 3Pa; Under the background of cold black, hemispherical normal emissivity is greater than zero. 90. Most, in the process of simulation test specimen is in working status, and to measure its parameters and environmental parameters. (refers to the spacecraft and components to the specified minimum temperature test a specific time; Hot dip refers to achieve within a specified time of the test temperature. From room temperature to the specified minimum test temperature, the quenching and rose to the highest test temperature, again after practice hot dip, finally returned to room temperature, temperature cycle.

thermal vacuum test equipment, also known as the space environment simulation equipment or space simulator, is simulated in the orbit of the satellite and its components under the condition of high vacuum test of satellite components. This is a component of thermal vacuum test. Thermal vacuum test chamber is mainly composed of a vacuum container, radiator and radiation screen, test platform, refrigeration, heating system, vacuum system, circulating water system, air supply system, measurement and control system, as well as the safety protection system.

vacuum system application in the thermal vacuum test equipment in vacuum system before put into production, must be carefully check each part of the fastener is loose. If the loose, must be correct and tighten.

before driving, the tank must be filled with water, open the water pump inlet valve, and then run the anti-corrosion pump. Pumping idle speed and reverse rotation is forbidden, in order to prevent damage to the machine seal, impeller and other parts of the pump body. Before the vacuum system to stop open the exhaust valve or wait for vacuum degree drop to zero. Under 092 MPa, then stop. In order to prevent high vacuum, formation damage of reverse suction check valve. ( If the check fails, please open the check valve cover to remove debris) 。 Use the steam - Water injection series vacuum system, the first drive and then open the steam valve. Stop, first close the steam valve, then stop to prevent the damage of high water and water jet vacuum water pump. In the vacuum system installation steam pipeline, pipeline must keep level, in order to prevent water accumulated in the pipe, otherwise it will affect the effect of vacuum. Circulating water in the cistern often should change or supplement, bottom water temperature should be kept, as the water temperature is too high, will affect the drainage and vacuum.