Experts Detailed first manned rendezvous and docking: A Space stopping is not simple
<span class=" img_descr "God nine to five products to combat the weight loss challenge. The people picture
18 17 am, the astronauts Jing Haipeng successfully open round the orbital module hatch, into the docking channel, Jing Haipeng then successfully opened the the JEM door of the Temple One to floating posture is first to enter the temple. Astronaut Liu Wang, female astronauts, Liu Yang same attitude into the Temple. This is the Chinese astronauts for the first time to the target vehicle is space to run “stopping by”, they will work here about six days of life.
“very smoothly, very successful, are not bias!” Overall the Department of Mechanical Engineering General Research Center, deputy director of manned space flight of the five branches of the China Aerospace Technology Group, 35-year-old Hao Ping, via live television watching astronaut “stopping” the whole process, very satisfied with his performance on the door.
a little pressure to open the door when strenuous
in space to open the door, close the door, not like as simple as on Earth. Shenzhou VII spacecraft successfully flying in 2008, Zhai Zhigang on the orbital module hatch ready to enter the space, due to the orbital module cabin pressure, pull several times, the door was open. In addition, foreign was also the rendezvous and docking, the doors open.
this time to prepare the door open in case of unexpected situations such as plans, but the pressure is well under control, all you need to enable plan. “Said Hao Ping.
God, nine have three doors: the front door at the inside of the docking mechanism, the extravehicular hatch and return to the bay door, the temple is only one door.
Hao Ping, said the success of the rendezvous and docking, the God of nine in the docking mechanism inside front door, the door between Temple One, the formation of a closed channel, initially vacuum state. Air, astronauts must first be carried on the spacecraft to the channel complex pressure, open the docking channel balancing valve to ensure that both sides of the pressure balance.
astronauts in space is not a particularly good force, if a little pressure, the effort will open the door. “Said Hao Ping.
God Kau side of the door, the astronauts opened by the handle. Consider convenience astronaut operations, efforts to design in accordance with one arm can open the door, as far as possible so that astronauts can use a relatively small force to open the door.
This creates a paradox: God nine to fly in space a long time, the greater the compression of the sealing ring door within two to fit better, the stronger the sealing, but This will also lead to the door switch force increases. “said Hao Ping.
how to resolve this conflict? From God, eight, in order to find a suitable ring compression ratio, the researchers have done a lot of trial, the finalization of the ring compression rate of more than 7 percent.
door seal performance, related to the safety of the astronauts’ life, is very important. In order to ensure high reliability, the experts carried out a large number of trials and testing. To ensure the sealing performance, the door switch is the number of not less than 200 times. “In fact up to 300 times, 200 times less than the reliability is very high.” Said Hao Ping.
door if the folder of a hair, the leak rate may not meet the requirements
on both sides of the docking channel, God nine and the Temple of the door have a porthole observe the opposite situation, the astronauts through the porthole. Hao Ping, at design time, this is a big change of the technical state of the door this wheel structure of the original door on the whole moved to somewhere else to go.
door design, there are some special requirements. For example, the opening angle of not less than 100 degrees, the docking channel can be fully rendered. Door shaft damper design is not particularly smooth, and to ensure that the switch will not be a very casual, the astronauts do not accidentally touch, or a little wind will not make the door suddenly closed.
One temple door, and God nine almost exactly the same. Jing Haipeng, door key, open the door. This is the Temple One of the doors for the first time in open space. “This is critical, key forgot white to go.” Hao Ping said, laughing.
astronauts to leave the temple, close the door, nor is it a simple matter. Hao Ping, said that the astronauts have a secret weapon: wipe clean cloth – similar to the wipes, the need for plastic, to maintain a certain humidity, and also requires the fire, no toxic gas release. The astronauts use a clean swab cloth, has to clean the door seals of the Temple and God nine. “If you clip a hair, the leakage rate may not meet the requirements.”after three years of development, the
researchers paid a lot of effort
Hao said God nine and Temple on the door from the initial sample to positive samples, after about three years development, the researchers paid a lot of effort.
He cited an example: God nine doors fitted with a camera through the camera to watch the docking of the whole process. After the cameras put something to the door to increase the load, how to ensure that the door will not be deformed, destruction, experts have done a lot of calculation, the test proved that the door can withstand camera.
said Hao Ping, the camera before the rendezvous and docking, the use of specially designed butterfly screws installed in another place, aligned cabin. Before the rendezvous and docking, the astronauts can easily put it down to change up to the door, the two interfaces is exactly the same in order to reduce the complexity of in-orbit operations.
this idea to produce the relevant team to work together to design units and production units before and after a few months time, and finally solve this problem. (Liu Yi)
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