Chapter 289 (2/2)

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.