Chapter 289

Bao Zixuan came home and saw Li Yulin waiting for him in the living room. It seemed that his mother was still worried about herself. But when I thought that Li Yulin had just recovered from a serious illness and was still recuperating, I really couldn't bear to have steamed stuffed buns rested so late.

Steamed stuffed bun Xuan asked with concern, "Mommy, why is it so late and haven't had a rest."

Li Yulin: "didn't you say you came back today! I've slept too much recently, so I want to talk when you come back. "

Bao Zixuan: "are you worried about meeting Zheng Yutong tomorrow! Don't worry, I won't put on airs. I'll try my best to be like a younger generation meeting an elder. "

Li Yulin: "before, I wanted Zheng Jiajia to be my daughter-in-law, but now it seems that I can't force my feelings. You can do these things in the future!"

Hearing her mother's sudden change made baozixuan a little less than stabbing her hand. After all, she really wanted Zheng Jiajia to be her daughter-in-law. Why has it changed all of a sudden now! What is the reason!

Bao Zixuan: "what's the matter with you? Suddenly it changes so fast."

Li Yulin: "you're still young. Don't worry about it. But through these days of observation, I found that Zheng Jiajia is not the best choice. I won't participate in these things in the future. I don't mind if you find one for me, but I can't help it. "

In fact, steamed stuffed bun Xuan really guessed well. Li Yulin found that Zheng Jiajia was not a very ideal candidate through observation these days. Before, I wanted to increase my son's inside information through marriage. Now it seems that it's better to find a relatively simple daughter-in-law who doesn't make trouble for my son, so as not to damage the interests of baozixuan because of family interests. He also analyzed the matter this time. Zheng Jiajia used her relationship to make baozixuan compromise.

This is not a daughter-in-law who needs to be able to take care of her son's family, and Miss Zheng Jiajia can't take care of people with her temper. He doesn't want his son to come back from a day's work and even face a person who boos and asks for warmth, so he can't feel at ease when he dies.

The next morning, baozixuan came to the black cloud manufacturing center to investigate the aircraft engine. Now both theory and processing capacity can meet the requirements. The only thing lacking is that the basic materials always fail. This is an inextricable topic, that is, the basic materials of later generations of China have not been able to hand in satisfactory answers.

In the future, Germany and Rb will be the two countries with the best R & D and production of basic materials, but fortunately, baozixuan has been laid out in advance. Otherwise, the more you go back, the more passive you will be, and a bad person will be strangled by his neck. Samsung has no raw material supply in South Korea. Finally, it had to put down its posture to ask RB people for help. Bao Zixuan didn't want to play such a thing on himself.

Now all the materials about aeroengines come from the Soviet Union, and Lao maozi's strength in this field is also obvious to all.

Looking at the aircraft engine made by the engineers according to the drawings of baozixuan. Although there are still many defects, I believe there should be no problem as long as it is seriously implemented. This time he wants to become a supplier of aeroengines. If he can't, it's a big deal to produce his own aircraft. In short, all future weak projects in China, baozixuan, want to layout in advance, otherwise it's really too late.

Looking at this aircraft with many excellent engineers gathered in black clouds, baozixuan knew that history was changing a little. This machine should not appear in Xiangjiang, because it should be in the laboratory of British RORO company. But now everything has changed, which can be said to be the engine to break the monopoly of Europe and the United States.

At present, there are three major suppliers in the aviation industry, namely Pratt & Whitney in the United States, general motors and RORO in the United Kingdom. RB people are not very strong in this fast. Aeroengine has always been regarded as the Pearl of industry. Today, black cloud has mastered it. This is a very exciting thing, and it is also the driving force for me to move forward.

Hartmann is a German aeroengine engineer. He is 74 years old this year. He had already reached the age of retirement, but he was invited out of the mountain by heiyun. As a member of the R & D team of the world's first jet aircraft, he has been working in an automobile factory since the war. However, it is always difficult to give up his love for aircraft. He only rehearses the working principle of aeroengine, and his technology has not fallen over the years.

Bao Zixuan looked at the engine and said, "old Hartman, how's it going! Now it feels great to make this guy yourself! "

Hatman smiled and said, "boss, this is an industrial miracle. This engine should appear in RORO, Pratt & Whitney, or general laboratories, and the worst should also appear in Rb. I didn't expect her to appear in Xiangjiang, which simply subverted people's cognition. "

Bao Zixuan: "Hartman, you have to believe in yourself and black clouds. We can always create miracles. Please introduce its performance! "

Hartmann: "compared with the dual rotor turbofan engine adopted in the United States, its three rotors can work at the optimal speed respectively, reducing the number of rotor stages, blades and adjustable blades. Due to the small number of rotor stages, the rotor can be shorter, improve the rotor rigidity and reduce the performance degradation rate. The high-pressure turbine of double rotor engine is generally two stages. The second stage works at high speed and needs to cool the rotor blades, while the medium pressure turbine of three rotors works at low speed and does not need cooling, which reduces the cooling air requirements and ensures that the engine oil consumption rate is reduced by 1.5%. One disadvantage of three rotor is that the arrangement of ball bearing is complex, but we use circular arc end tooth coupling, which makes the engine assembly and disassembly simpler than the double rotor engine without this coupling.

The compressor life of heiyun engine is 40000 ~ 70000 h, the medium and high pressure turbines are 25000 ~ 40000 h, the combustion chamber can reach 40000 h after repair, and the disc shaft is 20000 cycles.

It can be said that the overall performance of our heiyun 1 engine is more than 15% more fuel-efficient than that of American products, and the thrust weight ratio is also stronger than that of the other party. However, the only disadvantage is that the overall cost is 20% higher than them, mainly due to material and process requirements. Apportionment to labor will reduce some, but not much. "

As an aeroengine engineer, Bao Zixuan certainly knows the performance of this machine, but he only puts forward theories and parameters. The rest is mainly handed over to the German team, which did not disappoint themselves.

Germany is a particularly developed and serious country in the field of industry. They always believe that they are absolutely a powerful country in the world in the field of machinery and industry. It is only due to strategic factors that they finally fail. But the pride in their bones can't be easily erased. Baozixuan just grasped this point to make them glow in the second spring.

Bao Zixuan said, "what else needs to be tested? I'll give you enough time. We must put safety first and ensure that our engine can't go wrong when installed on any aircraft. Now we can negotiate with some small aircraft manufacturers. The price can be negotiated and lowered appropriately to let people know our engines. "

"As for other things, I'll leave it to you. I have only one request for you. Don't be afraid to spend money on a large number of experiments to ensure everything is safe."

Hartman: "boss, please rest assured. I know what to do. I will instill your requirements into every employee who produces aircraft engines. We Germans will not smash our own signboards. "

This is also the reason why baozixuan is relieved. However, now the senior technicians and engineers in Xiangjiang heiyun Industrial Park are from Germany and Rb, which is not a long-term plan. Once the Soviet Union disintegrates, they are likely to leave, and the state may even issue administrative orders to them. Now it is the fundamental way to solve the problem to build Yulin Institute of technology early, Otherwise, it will always be controlled by others.