The ups and downs of life in the Siheyuan

There was a small auditorium filled with people from all walks of life.

The meeting was attended by representatives from universities across the country, radio manufacturers, machine tool factories, research institutions, the Chinese Academy of Sciences, and leaders of the First Ministry of Machinery.

The theme of the conference is China Semiconductor Development Direction Seminar.

After the leader's speech ended, all representatives came to the stage to express their views.

"Since everyone thinks that semiconductor technology is the basic technology of the future, I would like to express our views on behalf of **.

Let me first talk about the current situation in the country:

Semiconductor technology is in its infancy, with heavy investment in capital and manpower. Our technology is weak and we are short of talent.

. . . . . .

Therefore, it is suggested that it is more practical to vigorously develop mature electronic tubes."

This representative immediately endorsed the electronic tube factory.

"I am a representative of Factory 714. As far as I know, foreign countries have eliminated electronic tubes and begun to vigorously promote transistors. Many achievements have been made.

In 1958, IBM produced the RCA501, the first computer to use all transistors.

The calculation speed has increased from thousands to hundreds of thousands per second, and the storage capacity of main memory has increased from thousands to more than 10.

Another example is machine tools. Countries around the world are now researching CNC machine tools, which not only provide high processing accuracy, but also greatly improve production efficiency.

. . . . . .

Therefore, we recommend vigorously developing transistor technology."

Then, various organizations took the stage to give speeches, and the majority supported the vigorous development of semiconductor technology.

A representative of the Chinese Academy of Sciences took the stage and said, “Westerners have begun to study chip technology, and everyone agrees that chips will be the core of future technology.

So I suggest that some capable research institutions should consider chip research more."

His speech was concise and concise, but there was a lot of discussion in the venue.

Some people simply stood in the audience to express their opinions.

An hour passed quickly.

The host and the leader of the First Machinery Department had to interrupt everyone's discussion.

“Everyone’s opinions today are very good. If there is more support for the development of semiconductor technology, we can think of more ways to do this.

As for the high-purity wafer issue that everyone is worried about, we have channels to obtain sufficient quantities.

There is also the issue of how to manufacture the chip after it is designed that everyone is concerned about.

I would also like to express my opinion here, we also have channels to produce for everyone.

Of course, we should not engage in designs that are too complex, and it is best to keep them within the range of 100 transistors."

The leader's speech triggered another discussion among everyone.

It’s not that we are surprised about channel issues, we all know these well, and that is Xiangjiang.

What everyone is more curious about is chip manufacturing. They don't know which country in the world has the ability to provide such services.

After another round of discussion, everyone basically decided that they would work hard on chip design in the future.

When senior officials learned about the laboratory's chip design and manufacturing capabilities, they always felt that it was overkill for only the military.

Just thinking about how to promote the development of the national economy.

Therefore, this meeting is to promote wafers and chips.

Encourage all walks of life to quickly enter the field of electronic technology.

Especially major universities, I hope they will train more graduates in chip design.

In order not to arouse the alertness of Western countries, the number of transistors was controlled within 100.

Through understanding, the West is vigorously developing chip technology and also researching lithography machines, and has made certain progress.

Therefore, as long as we maintain a pace that is one step behind and develop the national economy slowly, it will generally not cause too much of a reaction.

As for the military, there has long been no controversy. The first world's most advanced chip production line is under construction in the Mianyang mountainous area.

There are currently two types of chips they are preparing to put into production, the Lilou anti-artillery radar computing chip and the power control chip.

Moreover, Li Yuandu has formulated various specifications for chip design and manufacturing.

From the beginning, the versatility of each process of the chip was ensured.

Now some secret military research institutes are developing special chips.

With the chip production line, the inspiration of countless military equipment designers was immediately activated.

All participants have undergone strict political review and strict confidentiality measures have been adopted.

Make sure to keep the secret of the chip production line strictly before combat effectiveness is formed.

Li Yuan didn't care much about the above. His current thoughts are on the turbojet engine.

The turbojet-6 engine is an imitation of the Daimao Elder-9 turbojet engine, and the other party provides a complete set of drawings and key materials.

There are more than 2500 kinds of spare parts for the whole machine. Except for key components, most parts are domestically produced.

The structure of a turbojet engine consists of an inlet, compressor, combustion chamber, turbine and tail nozzle. There is an afterburner between the turbojet-6 turbine and tail nozzle.

Here's how it works:

1. Air is sucked into the air inlet and compressed in the compressor.

2. The compressed air flows into the combustion chamber, mixes with fuel, and burns to produce high-temperature gas.

3. The high-temperature gas drives the turbine to rotate, and the turbine drives the compressor and nozzle to rotate.

4. The nozzle accelerates and pushes out the high-temperature gas, generating reaction force to push the aircraft forward.

5. Fuel is injected into the afterburner, allowing the incompletely burned gas to mix and burn again with the injected fuel, which can increase the thrust of the engine to about 1.5 times.

The disadvantage of the afterburner is that fuel consumption increases sharply, and excessively high temperatures also affect the life of the engine. Therefore, there is generally a time limit for the engine to turn on afterburner.

After more than a month of hard work, the engine was completely disassembled and surveying was completed.

Overall, although the processing accuracy is not satisfactory, it is still usable.

Of course, some processing quality issues are also recorded to provide input for manufacturers to improve quality control.

The entire engine's oil valves and air valves all use electro-hydraulic systems, which are complex to operate and have poor reliability.

At the same time, he also discovered that there was a heat-insulating cavity composed of a heat-insulating ring inside the combustion chamber, and the outer wall was too thin.

In the event of a sudden increase in air pressure, it is easy to collapse, causing the turbine shaft to be squeezed, thereby triggering the risk of mid-air shutdown.

By looking up the design drawings, the thickness of the outer wall is only 0.8mm.

The above are some of the problems he can find.

Based on the current accumulation of knowledge and experience, he should be able to solve the above two problems.

However, by reading the flight records, the turbojet-6 engine still has surge problems.

There is also speculation in the record of the cause, but he has no solution and has put it on hold for the time being.

He plans to transform the turbojet-6 control system into an automatic control system, design a special control chip, and add pressure and temperature sensors.

The control algorithm is designed through the negative feedback control principle to achieve automatic control and at the same time transmit information to the pilot.

As for the thin-walled shell, it is much simpler, increasing from 0.8mm to 1.2mm, and at the same time, several reinforcing ribs are pressed on the shell.

Now his eyes are on the turbine shaft. Such a long turbine shaft is very easy to break if it is not processed properly.

He was thinking about how to detect flaws in such components and how to increase their service life.