Meng Qiang enthusiastically led the way in front, "Expert Li, this way, this way." ”

Seeing that Meng Qiang, a workshop director at the deputy department level, was so enthusiastic, and a "Li expert", Li Tianfeng smiled slightly and said modestly: "Director Meng, you are polite, just call me Xiao Li or Li Gong." ”

Meng Qiang shook his head and said: "Then how can it be done, Expert Li is a veritable member of the expert group, and it is completely appropriate to call him 'Expert Li', come, go this way." ”

Under the leadership of Meng Qiang, through the huge workshop assembly site, Li Tianfeng saw a lot of various aero engines being assembled.

There are piston engines, this type of engine, mainly used for agricultural aircraft, as well as primary training aircraft for the army, the technical content is not high, and the demand is not large, but Plant E still retains this model.

The largest number of final assembly sites are turbofan engines, turboprop engines, and turboshaft engines. The turbofan engine of Plant E is mainly a military turbofan engine with a low channel ratio, and the whole engine is like a cylindrical cylinder, which is mainly used for advanced training aircraft of the army.

The low-channel ratio turbofan engine refers to the turbofan engine with a bypass ratio of less than 4, which has the advantages of small windward area and fast speed, and is widely used in supersonic aircraft.

Large bypass ratio turbofan engine refers to a turbofan engine with a bypass ratio greater than 4, which has the advantages of high thrust, low fuel consumption rate and low noise, and is widely used in military and civilian transport aircraft and other large subsonic aircraft.

The development of domestic large-bypass ratio turbofan engines is in an extremely backward state, and although there are certain achievements in the development of low-channel-ratio turbofan engines, there is still a big gap compared with advanced countries.

Turboprop engines, the most is the turboprop B engine, which is the engine of Mao Laozi in the fifties and sixties, and the E factory introduced it from Lao Maozi technology in the seventies, and has been in production for dozens of years now.

Turboshaft engine, as long as it is the power of the helicopter, the final assembly site is mainly the turboshaft B engine, imported from the French technology in the eighties, and is currently mainly equipped with the power of the main helicopter Wuzhijiu, with a single engine output of about four or five hundred kilowatts.

Looking at the various types of engines that are being assembled in the assembly workshop, Li Tianfeng sighed slightly in his heart, these engines, in the international sense, are obviously backward, basically foreign products of the 80s, and some of them are still foreign products of the 50s and 60s.

The responsibility is heavy!

Seeing such a level of aviation industry, Li Tianfeng's heart was heavy, and a sense of responsibility also rose from the bottom of his heart.

The technical level of Plant E is like this, and other domestic aviation factories are basically the same, even if it is better, it is only too good to be good.

Fortunately, some skilled workers have a solid foundation, and some technicians are also more diligent, if there are technical leaders who bring these people together, they will definitely be able to make some achievements, Li Tianfeng thought so in his heart, and his idea of starting a business independently was even more firm.

"Expert Li, this way."

was thinking wildly, Meng Qiang's voice sounded in his ears, Li Tianfeng quickly gathered his mind, looked forward, and saw that not far ahead, a turboshaft C engine that was being assembled was surrounded by many people, including Liu Qingshan, deputy chief engineer of E factory.

Li Tianfeng walked forward quickly and said loudly: "Mr. Liu is good." ”

"Li Gong, come here, come and take a look." Liu Qingshan's voice was also relatively loud, revealing a bit of expectation, and he did not call "Xiao Li", but called "Li Gong" more formally.

The people surrounding the engine automatically got out of the way, Li Tianfeng smiled slightly, and walked quickly to the front of the engine.

"Director Cao, introduce the fault situation to Li Gong." Liu Qingshan Road.

Cao Wei is the technical director of the assembly workshop, and his age and qualifications are much higher than Li Tianfeng, but now is not the time to pay attention to these.

Poor gear mesh!

Hearing this, Li Tianfeng frowned slightly, looked at this pair of faulty gears carefully, and then said, "Is there a number of this pair of gears?" ”

"Yes, here."

A technician in charge of the assembly workshop next to him reacted very quickly, and immediately passed over the number jù metering sheet of several gears.

Take a look at the number jù meter sheet and understand the situation before you can make a judgment. Just like a doctor seeing a doctor, he first has to look at the patient's various checklists, and then he can judge what the disease is and what medicine to prescribe.

Li Tianfeng took these counting sheets, looked carefully one by one, and everyone next to him also looked at Li Tianfeng seriously, at this time, Li Tianfeng was the absolute center and focus.

After looking at it, Li Tianfeng asked: "There is no tooth profile of the gear, and it is best to be the number of three-dimensional three-dimensional scanning?" ”

What is this number jù? Many people are confused.

Liu Qingshan is the deputy chief engineer in the end, and the level is average, when Li Tianfeng asked, Liu Qingshan seemed to grasp something, and immediately looked at Li Tianfeng, as if he was waiting for Li Tianfeng to continue.

Li Tianfeng saw that Mr. Liu was looking at him, and everyone around him was also looking at him, so he couldn't help but smile slightly, and said patiently: "We all know that this is a pair of involute gears, and the current fault is poor tooth surface meshing......"

Li Tianfeng said in detail, and after talking for several minutes, everyone seemed to understand a little, and Liu Qingshan already knew and knew where Li Tianfeng was going to start.

After saying this, Li Tianfeng said to Meng Qiang: "Director Meng, immediately arrange workers to disassemble this pair of gears, arrange the contour scanning of the tooth surface, especially the working surface of the gear should focus on three-dimensional scanning." ”

"Expert Li, I'll arrange it right away." Meng Qiang said happily, and then shouted to the periphery: "Old Qian, old Zhou, disassemble this pair of gears and send it to measure immediately." ”

This Lao Qian and Lao Zhou, who look like they are forty or fifty years old, must be experienced masters, obviously, this is the best worker master specially selected by Meng Qiang.

Sure enough, the two of them were very skillful, and they quickly disassembled the pair of gears. This is a pair of high-precision gears, completely like a work of art, bright, without the slightest glitch, Li Tianfeng thought in his heart, it is such a pair of gears, and it almost became a roadblock for everyone.

After fusing his memory, Li Tianfeng has a lot of knowledge in his mind, you know, the aviation industry, involving all aspects of knowledge, the Li Tianfeng in his previous life can become an academician of the Chinese Academy of Sciences and the Chinese Academy of Sciences, the chief engineer of the latest fighter aircraft, he is relatively proficient in all aspects, and he is definitely a master-level figure in the fields of machining, assembly, design, and electronics, automation, etc.

This time, to eliminate the failure of this pair of gears, it is completely by relying on the massive knowledge in his mind, and Li Tianfeng knows where to start and where to solve the problem.

The assembly workshop also has an advanced three-coordinate meter, the scanning of the gear profile is no problem at all, as the scanning begins, a number of jù is scanned out, and the computer display screen of the three-coordinate measuring instrument, the outline of a gear is gradually formed.

Li Tianfeng looked at the scanning count, while holding a piece of white paper and a pen, quickly writing, calculating, everyone stood around Li Tianfeng, holding their breath, the scene was very quiet.

Liu Qingshan looked at some of the things that Li Tianfeng wrote on the paper, but Liu Qingshan was surprised to find that he couldn't understand them, some formulas were very complicated, and he had never been in contact with them.

Seeing these complicated formulas, Liu Qingshan couldn't help but raise Li Tianfeng's status in his mind to another level, and Liu Qingshan even thought in his heart that Li Tianfeng's level would not be above himself.

Thinking about it this way, Liu Qingshan himself was shocked, he is the deputy chief engineer, the on-the-job doctorate, in the field of aviation industry for 20 or 30 years, step by step, to have today's achievements. And Li Tianfeng has only graduated from college for three years, and his work experience has only been three years, does this surpass himself?

Could it be that Li Tianfeng is a genius!

Liu Qingshan thought a lot in his mind, and when he came back to his senses, Li Tianfeng had already stopped writing, and on the two sheets of A4 white paper, a lot of things were densely written, and there were a large number of calculation formulas.

Stopping his pen and seeing that everyone was looking at him intently, Li Tianfeng smiled slightly, and then said, "It's okay, everyone go with me, by the way, Director Meng, install this pair of gears on the engine again." ”

Everyone almost hugged Li Tianfeng and walked towards the turboshaft C engine together, Meng Qiang even had a little joy on his face, and asked tentatively: "Li Gong, do you have eyebrows?" ”

Li Tianfeng nodded, walked to the side of the engine, Li Tianfeng personally instructed Lao Qian and Lao Zhou, the two old workers, to install the gears, when assembling, Li Tianfeng also put forward some requirements, such as how much the runout should be, what is the distance between the two gears, these numbers are very accurate, accurate to 0.01, fortunately, the two masters have good skills, and basically meet Li Tianfeng's requirements.

Obviously, these numbers were calculated by Li Tianfeng just now, and after installing this pair of gears as required, Li Tianfeng said: "Director Meng, bring me a little colorant, and bring me a piece of the finest sandpaper, wool felt, non-woven cotton, and kerosene." ”

Although he didn't know what Li Tianfeng wanted these things for, Meng Qiang still waved his hand and arranged for someone to bring these things over immediately.

Liu Qingshan seemed to have guessed what Li Tianfeng was going to do, and said a little worriedly: "Li Gong, are you going to sharpen the tooth surface of the gear?" ”

"Yes, I'm going to do it myself and fix this pair of gears." Li Tianfeng said.

This, it won't be!

The people around him looked horrified, and the worried look on Liu Qingshan's face became even stronger. As we all know, this is a precision gear for aviation, with very high precision, and the surface requirements of the gear are also extremely high, and there can be no scratches.

This pair of gears, the speed of the driving gear is as high as 42,000 revolutions per minute, and the output is 1,200 kilowatts of huge power, 1,200 kilowatts is 1.2 megawatts, megawatts! With such a large power, this pair of gears has to withstand a lot of force during work.

With such a large stress condition, a very small defect on the surface of the gear, such as a very small scratch, or a small scar, such an inconspicuous small defect may bring irreparable damage.

Now, Li Tianfeng actually wants to take matters into his own hands and polish this pair of gears, what is the situation, everyone is collectively stunned!

……

Thank you for the tips from "Friends Bastard" and "Waiting for Nature"!

In addition, ask for recommended tickets and collections!

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