The structure of the core aircraft of Yonghan Aviation Power Technology Co., Ltd. is the same as that of the fourth-generation turbofan engine, but the second-generation single-crystal high-temperature material was used before, and now after the major breakthrough of the third-generation single-crystal high-temperature material, the fourth-generation turbofan engine can be launched quickly without a large modification of the core engine.

Yang Jie nodded and said: "As far as the structure of the core machine is concerned, the engine produced by our company now will indeed not be worse than the F119 engine in the United States." ”

"In that case, are you already trial-producing the fourth-generation turbofan engine now?" asked Ma Qiulin.

Yang Jie nodded: "We are indeed designing a new high-thrust turbofan engine, the drawings have come out, and we are preparing to enter the comprehensive trial production stage, and begin to verify the process of each part, if the speed is fast, the first engine can be installed for test run in the second half of next year." ”

"You're really fast. ”

He Yongqing said with emotion.

"To be honest, there is at least a ten-year gap between our company and these overseas giant companies, and there is at least a two-year gap between other domestic aviation manufacturers and foreign countries. ”

Yang Jie said.

"Yang Shao is very right, we can only catch up if we spend more time and energy to do these things. He Yongqing nodded.

At this time, an engineer from the design department knocked on the door and came in and reported: "Yang Shao, Mr. Wang, the design department is ready, and the materials are ready." ”

Yang Jie said with a smile: "Governor Ma, Mr. He, and Chairman He, let's go to the conference room next door to introduce you to the design drawings of our turbofan engine." ”

He Yongqing and He Zhipeng exchanged a look of surprise, and the two just wanted to understand in detail about all aspects of this engine.

Ma Qiulin stood up and said happily: "Okay, then let's go over!"

Everyone came to the conference room, and after He Yongqing sat down, he was surprised to find that a panoramic 3D color map of a large bypass ratio turbofan engine appeared on the snow-white screen of the conference room.

Seeing the 3D color picture of this turbofan engine, Ma Qiulin asked with great interest: "This is the turbofan engine designed by your company?

The beautiful fan blades in the big fan intake duct of the engine are indeed very eye-catching.

He Zhipeng said with a smile: "It is indeed very beautiful, I want to use this picture as a computer desktop and look at it every day." ”

Wang Yonglin said with a smile: "This is the first turbofan engine with a large bypass ratio designed by our company, and our internal model is temporarily called Kunlun." ”

The ppt of the engine has already been done, Wang Yonglin personally introduced this turbofan engine, opened the introduction ppt in the laptop, and introduced it with pictures and texts.

This turbofan large bypass is set very high than the design index of the turbofan engine, the thrust-to-weight ratio reaches ten, the fan blades use titanium alloy wide chord hollow blades, ceramic matrix composite flame cylinder, the third generation of single crystal turbine blades, the use of lean oil combustion technology, while the life of the engine to reach 10,000 hours, while simplifying the number of engine parts as much as possible.

"Yang Shao, although your company has mastered single crystal high-temperature materials and powder metallurgy technology, but in order to make the engine have such a long life, the bearing of the engine is very critical, has your company also made a major breakthrough in the bearing?"

He Yongqing asked in surprise.

The rolling bearing of the main shaft of the aero engine is a key component of the engine, which needs to withstand various stresses and pressures under the harsh conditions of high temperature and high pressure, and carry out a high-speed working mode of 3000 revolutions per second, and the life of the main bearing directly affects the overall life of the aero engine.

The reason why the United States can achieve such a long life in engine life is entirely due to the research and development of bearing life led by NASA at the end of the 50s of the last century, which was completed until the 70s, thus improving the overall level of aero engine manufacturing in the United States.

This is also an important reason why the level of American aircraft engines in the 70s instantly opened the period of the 10-year gap between the Soviet Union.

Small bearing research and development involves materials, grease and lubrication, manufacturing, design, bearing manufacturing equipment, testing and testing and a series of technical problems, but also involves contact mechanics, lubrication theory, tribology, fatigue and damage, heat treatment and material structure and other basic research and interdisciplinary disciplines, although it looks inconspicuous, but it can be said that it is an important standard parts in the field of manufacturing, the level of bearings can determine the level of manufacturing, there is no shortcut in this field, only their own continuous hard work.

"Hehe, the Machine Tool Research Institute has a special bearing research department, which has been working bearings over the years, and has finally made a big breakthrough. ”

Yang Jie said with a smile.

Machine tool research institute attaches great importance to the research and development of bearings, and there is also a bearing factory below, which has been producing and developing bearing technology for the production of various bearings for the products of Huaxing Group Company, and also authorizes the technology to domestic bearing manufacturers, so as to maximize the research and development of bearing technology to get the maximum profit.

Now the bearing alone can bring tens of billions of profits to the Machine Tool Research Institute every year, and the department of R & D bearings also has sufficient funds to continue to carry out research and development.

"Yang Shao, your Huaxing Group Company is really powerful in technology research and development and industrial transformation. He Zhipeng said with emotion.

Yang Jie smiled.

He Yongqing opened his mouth and asked: "Yang Shao, Mr. Wang, the design index of your turbofan engine is so high, are you confident that you can achieve it?"

"There will definitely be a lot of problems in this process, but the design team has carried out various simulation calculations in the design support, and there will be no major flaws in the design, and the next thing that needs to be tested is how to make these things, there are still a lot of problems, but I am still very confident. ”

Yang Jie said.

"We at COMAC also hope that you can successfully complete the final assembly of the engine and the long-term test test. ”

He Yongqing nodded.

At this time, Ma Qiulin also picked up a picture album sent by the staff, which was the color "se tu" album of the first turbofan engine of Yonghan Aviation Power Technology Company, which was prepared for participating in the Zhuhai Air Show in November this year.

The 3D color drawings drawn by the company include general drawings and component drawings, although they are drawn using drawing software, but they look very close to the real photos, and if you don't look carefully, you really think it is a color photo of a real aero engine.

The color drawings of these parts are all cut-outs, such as the fan part, which are cut symmetrically from the central axis, like a watermelon cut in half.

The purpose of this is naturally to show it more clearly.

"These color pictures you provide are so detailed and clear, don't worry about leaks?"

Ma Qiulin asked.

"It's just a color map, no size, no technical conditions, and it won't cause leaks. ”

Yang Jie said.

Ma Qiulin nodded: "These brochures you have prepared are very good, which is very helpful for your engine publicity." ”

These brochures are very delicately drawn, and they are printed in copperplate, and the color printing quality is very high, this album about the Kunlun turbofan engine has more than 10 pages, and the other album about the Hengshan engine has more than 20 pages.

"Are you ready to participate in the Zhuhai Air Show?" asked Ma Qiulin after a pause.

Wang Yonglin opened his mouth and said, "Governor Ma, we are almost ready. In this air show, we will exhibit the actual Hengshan turbofan engine, as well as several models being designed, and also display our company's engine components. ”

"Okay, this is the first time that Yonghan Aviation Power Technology Co., Ltd. has shown your product and technical achievements to the public, and your work has been done more carefully, and we must boost the confidence of our domestic people in our national aero engine. ”

Ma Qiulin said happily.

"Yes, Governor Ma, we will definitely do a good job in this air show. Wang Yonglin nodded heavily.