Cabin door fast leak detector "artifact" convoy major aerospace projects

Guidance: the fast leak detector of the hatch door is also determined to be used for subsequent space stations and cargo ships. It is an indispensable scientific instrument for the construction and operation of China's space station. In addition to the door fast leak detector, Li De Tian team also developed a special leakage rate measurement system for the lunar sample package, and applied it to the accurate measurement of the vacuum leakage rate of the Lunar Sample Package three.

Xinhua news agency, Lanzhou, February (Xinhua Zhang Wenjing) 15 (reporter Zhang Wenjing) through more than 10 years of continuous research, the Lanzhou Institute of Space Technology Physics Research Institute researcher Li Detian and his team successfully developed a manned spaceship gate fast leak meter and other measurement "deity", to solve the space, nuclear industry and other fields of precise measurement of small gas flow The difficult problems will play an important role in ensuring major projects such as manned spaceflight and lunar exploration.

Li Detian introduced, manned space engineering, the astronauts to fly in space for many days, during the astronauts to enter the orbital module from the return cabin, then the orbit cabin back to the return cabin, in addition to the cabin activity, which will open and close the hatch. Astronauts in the cabin to survive, maintain their normal life gas can not leak, so accurate and rapid detection of the door sealing is very important.

Leakage rate is a key index to measure the tightness of hatch door. The smaller the leakage rate, the better the seal. The fast leak detector can complete the test in the shortest time. Li Detian said.

The rapid development of China's aerospace and nuclear industry has made urgent demands for accurate measurement of micro gas flow. "We have developed a rapid leak detector for manned spaceship door. The entire instrument is less than 5 kilograms, and the time required for automatic completion of all tests is less than 8 minutes. It can realize the rapid and accurate leak detection of the hatch and docking surface. Leak detector leak detection effective volume is small, high sensitivity, technology has reached the international advanced level. Li Detian said.

According to the introduction, the device has been successfully applied to Shenzhou eight, Shenzhou nine, Shenzhou ten manned spacecraft and the Tiangong-1 target aircraft, providing an important guarantee for the implementation of China's manned space engineering. The fast leak detector of the hatch door also determines that it will be used for subsequent space stations and cargo ships. It is an indispensable scientific instrument for the construction and operation of China's space station.

In addition to the door fast leak detector, Li De Tian team also developed a special leakage rate measurement system for the lunar sample package, and applied it to the accurate measurement of the vacuum leakage rate of the Lunar Sample Package three.

"The three scientific goal of the lunar exploration is to return the sample, which requires the unmanned automatic encapsulation of the lunar soil under the high vacuum of the moon's surface, and the accuracy of the measurement results of the micro vacuum leakage rate of the packaging device will directly affect the smooth realization of the scientific target." Li Detian said.

According to Cheng Yongjun, a researcher at the Institute of Space Technology Physics in Lanzhou and a member of the Li Detian team, the measurement system can be used to ensure that the environment in the lunar sample package is infinitely close to the vacuum state, to bring the lunar sample back to the ground, and to withstand the changes of different environments such as high temperature and shock.

Source: Xinhua News Agency