Chapter 889

Others may not feel that much about this, but Djokovic and many other Russian aviation industry executives and experts understand it.

In particular, Djokovic, the deputy chief designer of Tupolev Design Bureau, was responsible for the development of Tu-204 before the collapse of the Soviet Union.

The original plan was to apply the new generation turbofan engine with large bypass ratio produced by the Soviet Union on figure 204.

No modern 3D industrial design software?

Djokovic at that time didn't pay attention at all. What's wrong with it? Can't he live without it? When the Germans were forced to go to Moscow, they couldn't even light up the kerosene lamp in the factory. Instead, they made weapons with their hands and finally drowned the Germans in the nest together with their evil ideas against humanity.

Because of this, Djokovic, a hard headed man, did not believe in evil at all. There were so many well-educated engineers and draftsmen in the Soviet Union who could draw one by one even without those imperialist software.

So this painting It was the collapse of the Soviet Union.

Djokovic had just woken up. It turned out that once there was a generation gap, it could not be filled by manpower.

In fact, it is true that drawing design, even the original computer graphic design, belongs to two-dimensional design, and the general things can cope with it. The slightly more complicated mechanical analysis, structural settlement and finite element analysis can not be shown.

If you can't see it, don't mention how to solve it.

It is precisely because of this problem that the United States took the lead in developing three-dimensional industrial design software, which was initially applied in the field of nuclear weapons research and aerospace, and achieved good results. Later, it was adopted by major industrial giants, and soon developed the second and third generation of three-dimensional design software on this basis.

Among them, the third generation of 3D industrial design software developed by Loma company applies VR holographic projection technology in it. Combined with higher level algorithm and large-scale computer, the complex surface and high difficulty section that could not be displayed in the past can be completely displayed.

These things simply rely on a large number of engineers to calculate and draftsman stroke by stroke drawing is obviously not achieved.

Even if we can barely get the theoretical design style out, the fan blade of turbofan engine can be made?

It's naive to have such an idea. In addition to the shape, the material, structure, stress level and so on, the threshold is waiting in front.

Otherwise, the fan blade technology of turbofan engine will not become one of the core technologies of high bypass ratio and high thrust turbofan engine.

No matter what else, just bearing the impact of birds is not something that ordinary materials and structures can afford.

The impact of a 0.8kg bird at a very high relative speed is as powerful as the full impact of an ordinary family car at high speed.

Under such conditions, the fan blade of turbofan engine with thickness less than 1.5cm should be in good condition.

This is to say that a Passat hit a small board less than 1.5cm thick at high speed. As a result, the A-pillar and B-pillar of Passat were completely destroyed, and the car was completely scrapped, but the thin board was nothing.

Think of such a degree, not to mention the ordinary aluminum alloy and steel, even ordinary titanium alloy can not do, that's all. The key is that the quality of this kind of fan parts must be strictly controlled. After all, it's something on the aero-engine, too heavy will affect the performance.

Light weight, high structural strength, durability, corrosion resistance, easy maintenance

And so on indicators listed together, is completely driving the pace of aviation engineers crazy.

Other people don't know that Djokovic, who wants Tu-204 to be equipped with a large bypass engine made in the Soviet Union, is really going crazy.

Djokovic, who couldn't make it out behind closed doors and was mercilessly slapped, finally used the traditional skills of the Soviet era and took other people's products to see if they could be imitated. As a result, he spent a lot of money to get three or four different types of turbofan engines with large bypass ratio from Europe and the United States. When they opened their fan blades, almost all the Russian manufacturers shook their heads It's like a drum.

There's no way. It's the complicated structure inside the European and American leaves. They really can't do it.

Because it is a new type of hollow support structure which is obviously different from the third generation honeycomb blade structure. The force is more uniform and the structure is reasonable. The most important thing is that the fan blade with this structure is lighter.

It's just how this thing is made. The Russians haven't analyzed it for most of the day. However, they just know that the blade itself is made of high-strength titanium alloy, and then Then there's no more.

The shape is uncertain, and the manufacturer also has no idea. If we put it in the Soviet era and slowly toss it, we still have some hope. However, the Soviet Union is broken to pieces, without strong support. The figure-204 with Russia's own large bypass ratio turbofan engine can only be a dream. It looks like nothing, and it will be broken at a touch.

Djokovic, who was in charge of the Tu-204 project a few years ago, has not given up his heart. He has been running around Moscow calling for more investment in the Tu-204 project. In less than 10 years, he will definitely build a classic airliner no less than Airbus A320 and Boeing 737.However, the newly born Russia is so poor that the salaries of all walks of life are almost impossible. What kind of airliner project do you want me to invest in? 10 years to go? Do you think Djokovic's head is broken? Go and cool down.

This is not bad. Some unscrupulous Russian oligarchs regard Tu-204 as a business to collect money. On the surface, they mean to introduce rodeo, Pratt Whitney and other engine giants to Djokovic, so as to replace Russian products with European and American power.

In fact, it's just killing people with a soft knife. In this so-called cooperative way, it stifles Russia's aeroengine manufacturing capacity and even the R & D capacity of large airliners.

Djokovic knew the consequences of doing so no matter how bad he was, and refused the so-called goodwill of these oligarchs without thinking about it.

If you don't eat hard or soft, you can't help it. If you live or die, you have to let fate decide.

Djokovic was also forced to do nothing. When he heard that there was an opportunity in China, he came to see if he could exchange some money with Tupolev to maintain the Tu-204 project for which he had been fighting for nearly 15 years.

As a result, before the cooperation of selling money started, he saw a wide chord titanium alloy fan blade with forward and Backward Swept profiles in Tengfei group, which is similar to the Damascus curved blade of "Trent" series turbofan engine fan blade newly launched by RORO.

This makes Djokovic have a sense of seeing him in the dim light.

I was as excited as when I broke the melon more than 40 years ago.

However, even though he was so excited, Djokovic was still steady, because he didn't know what the structure of the wide string titanium alloy fan blade of Tengfei group was like, so he suppressed his crazy heart and asked Liu Cong with a trill: "what's the structure inside your blade..."

"That's it!" Before Djokovic finished speaking, Liu Cong took apart the model in his hand, revealing the "Z" shaped structural support inside. Seeing this, Djokovic's eyes suddenly widened and trembled, pointing to the model: "yes Yes That's it This is it... "