China Independently Develops "Extravehicular Spacesuit"

"The development of our country"

The red arm of the spacesuit's left arm is printed with two big words on the right arm: flying sky.

"Flying sky" is the first generation of extravehicular spacesuit developed in China. The overall design and the design and assembly of all components are completed by the Chinese themselves.

In terms of the ability to accomplish the current tasks, it is close to the international level.

From inside to outside, the cabin clothing is divided into 6 layers: the comfort layer made of special antistatic treated cotton cloth, the rubber air backing layer, the main air tight layer of the composite joint structure, the limiting layer of the polyester fabric, the thermal insulation layer through the thermal reflection, and the outer outer protective layer.

The outer protective material can withstand the temperature difference between above 100 degrees Celsius, which is the most expensive clothing material in China.

The length of clothing upper limbs (sleeves) and legs (trouser legs) can be adjusted according to the length of each astronaut.

By adjusting the size, a suit of spacesuit can be used for astronauts of different shapes, and anyone with a height of 1.60 meters -1.80 meters can wear it.

The inner layer is the comfort layer. It is made of specially processed cotton cloth. The biggest feature is that it can not afford static electricity, because the pure oxygen in the cabin clothes will catch fire when there is static electricity.

The backup airtight layer is made up of rubber plates with a thickness of about 1 millimeters. It is pasted together with the upper limbs and other related structures to form a matching shape.

The main air tight layer, the rubber cloth used on this floor is tight.

It is an integral structure, completely covering the main joint structure of clothing, including trunk and backpack.

It should be able to inflate and pressurize, and not allow the garment to expand too much, but also make the joints move freely, and the technical difficulty is very great.

The limiting layer is made of very high strength material, because the pressure is very small whether it is backing up the air tight layer or the main air tight layer.

It can be said that the confining layer is the main bearing layer.

Vacuum shield heat insulation layer, which consists of 5-7 layers of aluminum coated polyester film, is separated from each other by network material, and is pasted together to form a powerful shield against bad environment such as vacuum temperature difference and radiation.

The outer protective layer is a special textile fabric. It is currently the most expensive cloth in the country. It can be kept intact at temperatures between 100 and 0 degrees. Its wear resistance and reflectivity are strong. After sunlight rises, it reflects back and absorbs very little.

Helmet: face window is divided into four layers.

Flying Apsaras

On the sides of the helmet, there is also a lamp to illuminate the chest part of the garment, which is beneficial for the astronaut to operate under the condition of insufficient illumination.

Like the headlights, there are warning lights on both sides of the helmet. Once an accident occurs, the alarm lights will flash and send out a language alarm.

In addition, the "flying sky" helmet is equipped with cameras, which can take pictures of astronauts when they leave the hatch.

The advantage of flying helmet is that its vision is larger than that of other similar products. This requires very high manufacturing technology, and the relevant scientists and technicians spend years to overcome the difficulties of helmet manufacturing.

Front chest equipment: operated by wrist reflector.

The "chest" of the "flying" extravehicular spacesuit is its "brain".

The electronic control desk on the front of the clothing is the core of the electrical system. There are clothes, power, pump, fan, tube, lighting, radio switch, OLED display, mechanical pressure gauge and so on.

Adjacent to the electronic control desk is the gas liquid control console, which controls the core parts of the clothing gas and liquid system. There are more than 20 valves in it to ensure normal oxygen supply and emergency oxygen supply, switch the main oxygen cylinder and the gas pressure main facility.

Flying Apsaras

Interestingly, because of the limited vision, astronauts can not see the chest and waist and hip equipment, can only be reflected through two wrist reflector operation.

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Glove touch: sensitivity pencil

The shoulder, elbow and wrist joints of "Feitian" spacesuit are three air tight bearing devices. Double deck seals can be turned, but there are special adjusting belts which can be adjusted to suit different people.

Because the cabin movement is mainly on the upper limbs, the knee and ankle joints of the lower extremities do not have high mobility, but there are many adjustment belts in the lower limbs and crotch.

The gloves of "flying sky" spacesuit have only one layer of air tight layer on the fingertips, which can keep the sense of touch.

These gloves are divided into different models.

When manufacturing, hand data of 14 people will be used to produce gloves suitable for Asians by using 3D scanning technology. The sensitivity can help astronauts hold 25 millimeters thick as pencils.

Hook and double rope: alternate use of extravehicular activity

Flying spacesuit has two umbilical cord, of which umbilical cord 01 is 8 meters long, and 02 umbilical cord is 4 meters long.

The umbilical cord connects the spacesuit with the spaceship. After the astronauts leave the cabin, the umbilical cord is not used in the independent mode, but once the accident occurs, the umbilical cord as the emergency oxygen supply tube will play a role.

The 2 safety hooks on spacesuit are very important for this mission.

When the astronauts come out of the cabin, the hook can play a role of safety protection, so that the astronauts will not leave the cabin.

The rope on these two hooks is one long, one short, one 3 meters, and one 1 meter.

The weight of a rope of 1 meters is 1 tons. Because it is short, it can prevent entanglement. It is folded. Once it is launched under external force, it shows that the astronauts have left the spacecraft.

Another 3 meter long rope is a spring rope, which can elongate and bear 1 tons of weight.

In the specific operation, the astronauts of the hatch cabin should use two hooks alternately, so as to achieve extravehicular activity like rock climbing.

Dressing procedure: bottom-up

After the flight, the astronauts should remove the clothing products hanging on the bulkheads of the air locks from the scaffolds and put them on the clothes rack, unpack, inspect and assemble them.

When dressed, the astronauts first sat on the back door frame of the cabin.

On both sides of the knapsack are oxygen supply parts. The astronauts wear the lower limbs first and connect the clothes to liquid cooling clothes.

The liquid cooling clothing can dissipate heat 70%-80%. It is made of elastic net fabric and has a hat, and a hose filled with water is arranged between the grids. The structure of the hose is mainly concentrated on the parts of the human head, trunk, thigh and so on.

The cold shoulder and waist of liquid cooled clothing are protected by special wool felt.

Flying suit: available five times.

Every design of flying spacesuit is very particular. It is necessary to consider the practical application of a small loop.

According to experts, our own "flying sky" extravehicular spacesuit is different from the US space suit because it does not have a brake device, and is close to the Russian spacesuit.

This suit can be reused about 5 times.

However, according to sources, in the seven mission of Shenyang, the spacesuit will be left in the air lock cabin, but the gloves should be brought back.

Trunk shell: armor for life

Trunk shell is the main body of extravehicular spacesuit, it is the assembly center of spacesuit, and all kinds of equipment and instruments should be connected with it, which is the most important task in the development of extravehicular spacesuit.

The trunk shell of the extravehicular spacesuit is an aluminum alloy thin-walled hardware structure. After assembling with the knapsack system, it can bear various loads of the ground pportation and the rising section. It has the functions of pressure protection, load support, sealing and so on, and is truly the astronaut's life armor.

It is amazing that the trunk shell of this "life armor" is aluminum alloy thin-walled hardware structure with a wall thickness of only 1.5 millimeters.

Respiratory system: gas inlet and outlet

There is a breathing system on extravehicular spacesuit, which is the key system for astronauts to automatically supply artificial air, exhaust gas, regulate safety pressure and purify odor in spacesuit, which is related to the life support and comfort of astronauts.

It is reported that the air quality in the extravehicular spacesuit can automatically mix many kinds of gases to make the air for adults, and automatically exclude the exhaust gas in time. It can automatically control the air pressure within the safe range and automatically clean the peculiar smell in the clothes to ensure the comfort of breathing.

Electric umbilical cord: a safe life passage

When the astronauts left Shenzhou seven into the mysterious space, they were connected to the spacecraft by an electric umbilical cord. The system, including the spacesuit cable net, the bag cable net and the air pressure regulating stroke switch of spacesuit, all undertake the important mission of supplying and pmitting signals to all parts of the spacesuit.

"Electric umbilical cord" is also a "rope" that can pull astronauts back to the cabin at any time. The umbilical data processor on the umbilical cord can pmit the collected spacesuit and cabin mounted equipment information to the spacecraft's digital subsystem, and pmit the information of itself to the ground through TT & C communication.

In this way, the safety of astronauts in space walks has been fully protected.

The softness of electric cord is just like that of ordinary colloid water pipe. Good softness ensures that astronauts are flexible in space activities.