Xiao Zhang, who is in his early thirties, also has several years of experience in aircraft assembly, and when he used to work in a certain domestic aviation company, he also had two years of after-sales cover experience at an air base.

Xiao Zhang said while disassembling the parts: "Squad leader, this engine is really clean, you see the outer surface of this engine, the outside of several large casings are clean, and there is not even a little oil stain." ”

Miao Yi nodded and said: "It is indeed very clean, it is not like a 300-hour long-lasting test run at all, and it is not much different from the foundation when we completed the assembly before the test." This shows that our engine is of very high quality. ”

Xiao Zhang said: "Squad leader, I used to do after-sales cover at a base for two years, and the important job is that after the pilot completes the flight practice, I conduct a cover check on the aircraft engine. You don't know, every time we check, we open the canopy of the plane, when we see the engine, everyone is the most headache, because the engine compartment is a piece of oil, the surface of the engine is almost the same, it is called a trouble. ”

"This engine is domestic, right?" asked Xiao Wang next to him.

Xiao Zhang nodded: "You don't know, some of the engines of the same model on our training aircraft are imported from Lao Maozi, and the same engine is the same as others, as soon as we open the engine compartment cover, the inside is much cleaner." ”

"It's impossible to contrast so clearly, is our domestic engine really worse than Lao Mao's?"

"Our domestic engine in terms of quality than the old Maozi engine is a quality level is certain, I have also engaged in a few years of field after-sales maintenance services, encountered the situation of the basis and Xiao Zhang is not much different, the difference between the two is really so big. ”

Miao Yi said.

"Squad leader, what do you say about this engine of our own company?"

"According to my years of experience, our engine is really very good, excellent quality, and relatively advanced design, this engine is the top level in China, and it is also the first-class level of similar engines in the world. ”

Miao Yi nodded.

"Squad leader, can our company's engine be comparable to similar engines in Europe and the United States?"

"I am sure that it can be compared with similar engines in Europe and the United States, I have disassembled the 300 engine of Pratt & Whitney before, and the engine structure designed by our company is different from that engine, but our company's processing technology and assembly process are really not worse than Pratt & Whitney. ”

Miao Yi said with a complacent face.

"Squad leader, I really hope that our company's motivation can complete the test of the high-altitude platform, and then start to assemble it on our own domestic aircraft in large quantities. Xiao Zhang said.

"Although there is no beginning of the high-altitude test bench test, but the test and improvement is a long process, even after the engine is put into service, it is necessary to continue to test and improve, but our company's test tests are really too detailed and rigorous, other domestic companies can not do it, I am very confident in our company's engine. ”

Miao Yi said.

"If it weren't for the boss of our company who invested so much money in aero engines, I might still be repairing those Russian engines at a certain base, and I would not have had the opportunity to assemble our own country's advanced engines. Xiao Zhang said.

"So we have to work hard, work hard, and assemble every engine in our company, so that we can be very comfortable telling people that these engines are assembled by us. ”

Miao Yi said with a smile.

Everyone nodded in agreement.

Under the skillful disassembly of this engine, the parts were dismantled one by one, put into the parts box one by one, and then pushed to the cleaning room not far away for careful cleaning.

The disassembly of the engine and the cleaning of the parts were carried out relatively quickly, and when the parts were cleaned and put on the inspection table one by one to start the inspection, Wang Yonglin accompanied Yang Jie to the assembly workshop.

For some key parts, Yang Jie has to take a look at it in person to rest assured.

After all, this is a 300-hour long-lasting test, after such a long time of testing, it is difficult to guarantee that some parts will not have some problems, the key is to see what type of problems these emergence, whether they are in the normal field, or beyond the normal field, whether they are abnormal problems.

If a large number of abnormal problems occur, it is necessary to conduct a careful analysis to find out the cause of the problem, and determine whether to make design or process improvements.

Several inspection staff were carefully inspecting the parts, and Yang Jie, Wang Yonglin and Liu Fu walked towards the inspection area together.

Wang Yonglin is extremely familiar with this engine, knowing that after 300 hours of long-term test run, he should look at some key parts, which parts he does not need to look at in person, and these inspection staff can check it.

Wang Yonglin's first thing to look at is those bearings, aero engines, the requirements for bearings are extremely high, this engine is used in the machine tool research institute to supply the bearings.

In order to ensure the quality of the machine tools designed and produced, the machine tool research institute designs and produces the bearings by itself, and these scientists from Russia are based on the bearing materials. The design and production process has a wealth of experience, and the design and production of bearings are naturally of extremely high quality.

Wang Yonglin still didn't dare to be careless, with white gloves, he picked up a main bearing boy and looked at it carefully.

For bearings, he is very experienced, pick up a ball of the main bearing, look at it carefully, and also hold a small flashlight, shine a light on the ball, with the strong light, so as to see more clearly.

After looking at it, Wang Yonglin nodded.

"Yang Shao, this ball is not the slightest abnormal, the surface is very bright, even a small scratch is not there, it looks very comfortable, the machine tool research institute is really very powerful in bearing materials and design and production. ”

Wang Yonglin said with a smile.

"I spent so much money for the Machine Tool Research Institute to study the electric spindle skills, if I can't even get the bearings right, then I'm going to be mad. ”

Yang Jie said.

Wang Yonglin looked at a lot of balls one after another, and then looked at the inner and outer rings of this bearing, and looked very carefully, without creating any abnormalities.

After reading several important bearings, Wang Yonglin looked at the turbine outer ring, the turbine outer ring is sealed with metal honeycomb, and when the engine is working, the turbine blade tip and the turbine outer ring maintain a gap of ten filaments.

Of course, this is a theoretical design, when actually working, this gap may be small, or large, if the gap is small, the tip of the blade may rub with the honeycomb, there will be a certain wear on the peak nest, a little wear is allowed, but serious wear is not allowed to emerge.

After looking at several pieces in a row, there was no wear and tear, Yang Jie also nodded slightly, the design and production and assembly of this engine are very good.

A total of 36 pieces of all carefully looked at it, most of them did not appear to be worn, only two pieces appeared very slightly worn, it can be said that the performance is very good.

After looking at the honeycomb of the outer ring of the turbine, Yang Jie looked at the grate teeth on the turbine disk, which are also used to seal tightly and allow for certain wear.

Konstantin and Wang Yonglin have extremely rich experience in design, and the design has been fairly and fully calculated, and the grate tooth foundation on the turbine disc is not worn, or very slightly worn, and it is completely within the normal field.

After reading the grate, Yang Jie looked at a lot of important and vital parts, without exception, there was no problem with the foundation, even if there was a little problem. Also complete within the normal realm.

Although Yang Jie had not been exposed to aero engines before, in order to control this knowledge as much as possible, he also made up a lot of knowledge in this area, and also asked Wang Yonglin and Konstantin and others a lot of core skills.

He has an amazing memory and a high level of understanding, and in the past two years, he has made himself an all-round talent in this field.

Three days later, all parts were inspected, and a special inspection report was formed.

This inspection report will be kept as an important material for at least 10 years -

The relevant materials of the engine are generally preserved for ten years, and even fifteen or twenty years will be preserved for more than ten years.

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