"It's this thing: gearing. We can use gearing technology in new engines, and with this technology, we can create new engines that are comparable to three-rotor engines. Of course, fuel consumption and noise can be controlled. ”

It was a blockbuster to take a slide with the structure of the gearing technology printed on it and project it onto the screen through a projector before telling the plan.

Well, Director Bai seems to have discovered something, no wonder Yang Hui insisted on getting the wheel transmission technology, it seems that he has been prepared for a long time, and it is the right time to take out this thing and use it.

The Germans were also surprised when they heard that gear transmission technology was going to be used, and the span of using this thing in a new engine was a bit large. The previous gear transmission technology was used in a small thrust engine of one or two tons, and this is also used in the medium thrust, is it really feasible?

Claude is the president of technology, and after thinking about it, he has a preliminary opinion.

"Gearing? This is a good way to use this in a new engine, but the problem is that we have no contact with aero engine gear transmission technology at all, and now we can directly develop a seven-ton engine for use, which is a bit difficult. ”

Germans now know how to assess risk, thinking about what was advanced and what was advanced, regardless of technical risk and reliability, but now they are learning wisely.

For this, Yang Hui has a way, gear transmission technology, how can it be said that I have not been in contact with it, I was fortunate to go to the United States, and I took great pains to get this thing, but it is not just used to match TFE731. Without the technology with development potential, Yang Hui was too lazy to spend that effort.

"No, you MTU don't. It does not mean that our company does not have gear transmission technology, our company just has the introduction of gear transmission technology. Now the technology is being digested and absorbed, and supporting production will be carried out soon. ”

Hear here. MTU company has nothing to say, as long as there is an introduction to gear transmission technology, the latter is easy to say, I am afraid that I don't even know how to enter the door.

In just these few words, the pulp fan engine, which originally felt promising, suddenly became useless. Claude stood up in surprise, with a look on his face that you were too awesome.

"Do you still have the strength? We'd love to take a look at your technical achievements, which are of great reference value for us to assess technical risks. ”

Look at the technology, waiting for you to see the technology. I'm afraid that you won't see it, otherwise how can you strengthen your beliefs and go to the dark with us.

"Yes, we have achieved a lot of results in our technical research, and there are some things that can be announced to our partners, and everyone who is interested can come and see them now."

Zhong Jianshe had already been prepared, all the things that should not be seen were locked, and the things that should be seen were placed in the most conspicuous place, and he walked into the office of the design team. Only then did I find that the hardware equipment of this design institute is not too far behind the international level.

However, the most attractive thing to MTU is the published information, and some technicians go up and pick up the materials and start researching. However, as Claude said, MTU has no experience in researching this technology, just look at the publicly available information. Nothing can be seen without long-term research.

Looking at what is written on the material, the original in English: the introduction of a reduction gearbox between the fan and the low-pressure compressor. It is used to achieve differential operation of the fan and high-pressure compressor, each operating at its own optimal speed.

The fan speed is reduced. In this way, the speed and aerodynamic loss of the fan blade tip can be effectively reduced, and the fan speed can be reduced, and the centrifugal force is also greatly reduced, so that the fan stress environment is greatly improved.

The low-pressure compressor can increase the speed appropriately at this time to improve the gas compression capacity. With the same boost ratio, the low-pressure compressor with gearing technology can have a higher speed, which can appropriately reduce the number of blades of the low-pressure compressor, or reduce the number of stages of the low-pressure compressor, thereby greatly reducing the weight.

The prospect looks very tempting, and I didn't notice anything outside of the mainstream technology of this aero engine before, but now I find that this thing is really promising.

Continue to flip through, only to find that this information has bottomed out, it is the time to see the wonderful, I didn't expect to give such a look, I was ready to continue to look for the following information, but was interrupted by Claude, the president.

"First of all, I admire your technical accumulation very much, I believe that we will not be able to see the information behind before the formal signing of the cooperation agreement, so we will talk about the specific division of labor."

It's really smart President Claude, it seems that he is still attracted by gear transmission technology, which can't wait, and it seems that the subsequent negotiations will be relatively simple.

Signaling Zhong Jianshe to let down his guard and continue to work, a group of people came in a hurry, and they left in a hurry, only the technical staff of MTU turned back step by step, looked at the gear transmission technology research office, and couldn't wait to go back immediately and scan everything inside.

Sitting in the conference room again, even the atmosphere is different, the sincerity of MTU cooperation is stronger, and now is a good time to discuss the way of cooperation, Director Bai gave the way to cooperate.

"At the request of the Federal Government of Germany, we will lend $200 million to our company, and at the same time, our company will also give up 40 percent of the share of engine development, which will be borne by MTU to form a joint company. We fully agree with this point, and the cooperation method is more specific, that is, our Southwest Aviation Science and Industry Joint Company will develop the engine core engine, and after calculation, the core engine research and development accounts for 45 percent of the engine. ”

Before the words were finished, MTU was happy in his heart, and wanted to follow the model of CFM56 engine development? Isn't that the best outcome MTU could have expected before coming here?

What happened this year, good luck, just announced that he cooperated with Pratt & Whitney, and now he has won a new project here, and the take-off of MTU's aero engine business is just around the corner

"No problem, our MTU company can complete almost all the technologies except the engine core machine, and of course, the gear transmission technology needs to be developed in cooperation with you."

Listen, the Germans thought very well, originally there was only 40 percent of the share, but now we have to inch in, and we have to wrap up 55 percent of the share except for the core machine.

I just want to ask: Do you have this appetite at MTU, be careful of indigestion?

Yang Hui couldn't bear it at this time, and immediately retorted: "Impossible, you only have a 40% share this time, and our company will be allocated to other businesses in addition to the core machine development business." The share of gear transmission technology is 10 percent, half of each side of the company, 5 percent of our company, and 10 percent of the share to be obtained. ”

It's really an empty joy, I thought that this time I could get some more shares, or even dominance, but now it seems impossible, and it can only be talked about little by little.

"Gear transmission technology will continue to be developed by our two partners, so that it can be applied to new engines, and we account for half of the research on gear transmission technology, of course, we MTU will provide the technology in gear manufacturing, and you will also provide all the information on the current gear transmission technology."

The conditions given by MTU are quite sincere, if it is digested by the base itself, and then slowly improved, at the current level of domestic basic industry, Yang Hui really does not dare to guarantee the quality of this gear transmission box.

to withstand the huge torque burst out of the seven-ton engine; It is necessary to solve the problem of heating of gears at high speeds; To keep up with the development progress of the new engine, I am afraid that only at the expense of life, and the life of a commercial engine is too short to work, even if it is just a subsystem.

Therefore, it is necessary to cooperate with Germany, MTU is also a world-class supplier of heavy-duty diesel engines, and they have their uniqueness in gear transmission, and the accumulation of German industry for hundreds of years must not be underestimated.

If you can get metallurgy, gear design, and even precision machining technology through cooperation, it will be beneficial to the whole republic, and you can cooperate with this thing.

This thing was bought back for $8 million, although its potential in the future is very large, but no matter how great the potential is, you have to put it into practical use and occupy the market first, which has to be before Pratt & Whitney starts to act. (To be continued......)