The test workshop factory area is surrounded by a high wall, outside the wall, separated by a few meters, is upright, high sound insulation belt, more than ten meters high poplar trees are very green, and then outside, is a piece of farmland, vegetable field, from the nearest farmer in the test workshop factory, at least three or five hundred meters away.

That's right, the test workshop factory area is relatively remote, already in the suburbs of Songzhou City, a few kilometers away from the Songzhou High-tech Development Zone, fortunately, although the place is remote, but the traffic is okay.

The entrance of the test workshop is an asphalt road, which is connected to Songzhou Avenue of Songzhou High-tech Development Zone, and has been leading to another township in the distance after the gate of the test plant area.

The location of the test workshop is relatively remote, and there are few people around, but the recent test runs are frequent, especially after entering the 150-hour long-lasting test run, the test runs are more frequent, and the sound of the test runs comes out from the test workshop factory area, far away, and some locals can faintly hear it.

"Lao Wang, that company seems to be some Tianfeng Technology company, what are they doing, why is there such a strange voice coming over."

"Yes, it was the test workshop of Tianfeng Technology Company, and my youngest son was working in it, and the voice said that the aero engine was being tested."

"Aero engines! They are actually engaged in aero engines! ”

The man just now looked proud, "Yes, my youngest son is engaged in aero engines, and there are often reports about this aero engine in Songzhou Daily." ”

"Lao Liu, your son is amazing, he is actually engaged in aero engines."

Lao Liu smiled proudly, although his son was just an ordinary employee in the test workshop, but in Lao Liu's opinion, his son was engaged in aero engines.

Engage in aero engines, say it. Lao Liu felt that his waist was very straight, very face-saving, and very proud.

"Lao Liu, is this the sound of an aero engine?"

Lao Liu said: "Listen to my son, this is the sound of aero engine testing. ”

"Lao Liu, what is an aero engine test!"

Lao Liu scratched his head. "Test drive, test drive."

Lao Liu is not very clear, but everyone basically understands that the test run should be the aero engine working, but it is working in the test workshop in the distance, not working on the plane.

The people around vaguely understood what was going on with the test drive, and everyone saw Lao Liu scratching his head. They all laughed kindly.

After everyone laughed happily, one of them said: "It's not bad to listen to this voice every day." ”

Another said: "It's not loud, it basically has no effect on us, and it's really hard to hear if we don't listen carefully." ”

"People are engaged in aero engines, and there is such a little sound, what impact does it have?"

………

Tianfeng Technology Company.

The 150-hour sustained test run lasted almost a month, and the 150-hour test run was completed within a month. The progress is relatively fast, after the test is completed. The engine is sent to the final assembly hall for disassembly, and then it is subjected to a rigorous inspection.

After such a long test run, it is necessary to check the condition of each part, including the size, the wear of the bearing, and the wear of some sealing metal honeycombs. Some of the inspection of the wear and tear of the sealing grate teeth and so on.

The assembly workers in the assembly workshop have disassembled and assembled this engine many times, and they are also familiar with it.

No, on a bench in the final assembly area, the engine, which had completed 150 hours of long-lasting testing, was being disassembled. Several assemblers are disassembling the engine as requested.

While disassembling the engine, everyone chatted from time to time, but the work in hand did not affect it, and everyone moved skillfully and methodically.

The equipment workers in the assembly workshop are not full, but more than 100 assembly workers, more than eighty percent of these people are skilled workers, at least have several years of aircraft assembly experience, the assembly and disassembly of this engine has been carried out many times, and we are naturally skilled.

While disassembling the engine, while chatting, of course, the content of the chat is about this engine, and there is no Hu Tianhai's gods.

Master Wang is the squad leader of the assembly class, and this time the engine was disassembled, Master Wang personally led the team, with several assembly workers, to disassemble the engine in accordance with the process requirements.

Among these assembly workers, Xiao Zhang is relatively young, and 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 domestic aviation company, he also had two years of after-sales maintenance 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." ”

Lao Wang nodded, "It's really clean, it doesn't look like a 150-hour long-lasting test run at all, and it's basically not much different from when we completed the assembly before the test." ”

Another assembly worker said: "It's really clean, and when we finished the assembly and sent it to the test workshop, it was basically like this." ”

Xiao Zhang said: "This shows that the quality of our engine is very good, let me tell you one thing, I used to do after-sales maintenance in a base for two years, the main job is that after the pilot completes the flight training, I carry out maintenance and inspection of the aircraft engine." ”

"You don't know, every time we check it, we open the canopy of the plane and see the engine, we have the most headache, because the engine compartment is full of oil, and the surface of the engine is similar, and it is very troublesome to clean up."

Seeing that everyone was listening carefully, Xiao Zhang continued: "You don't know, some of the engines of the same model on our training planes are imported from Lao Maozi, and the same engine of others, as soon as we open the engine compartment cover, the inside is much cleaner. ”

An assembly worker who was basically the same as Xiao Zhang said: "Xiao Zhang, it can't be so exaggerated, the contrast is so stark, is our domestic engine really worse than Lao Maozi." ”

Lao Wang said: "Our domestic engine is a quality grade worse than Lao Maozi's engine in terms of quality, and I have also engaged in after-sales maintenance services in the field for several years, and the situation encountered is basically similar to Xiao Zhang, and the difference between the two is really so big." ”

Seeing what the squad leader said, everyone believed it, and one of them said: "It seems that our aviation industry is still relatively backward. ”

Squad elder Wang said: "Although we are one of the five countries in the world that can independently develop aero engines, compared with Europe and the United States, there is a gap of at least 20 or 30 years. ”

Hearing this, everyone was secretly speechless, but they didn't think that the gap was so big.

Seeing that everyone was a little silent, squad leader Wang said: "However, according to my years of experience, our engine is good, the quality is excellent, and the design is relatively advanced. ”

One of the assembly workers said: "Squad leader, is it comparable to similar engines in Europe and the United States?" ”

Squad leader Wang nodded and said: "It will definitely be comparable to similar turboshaft engines in Europe and the United States, so we have to work hard and work hard to get this engine out." ”

"Yes, we must make this engine, and when the time comes, we will also raise our eyebrows."

Everyone nodded in agreement, and under everyone's skillful decomposition, the parts of this engine were dismantled one by one, put into the parts box one by one, and then pushed into the cleaning room not far away for careful cleaning.

………

The disassembly of the engine, the cleaning of the parts, are carried out relatively quickly, when the parts are cleaned and put on the inspection table one by one to start the inspection, Li Tianfeng personally came to the assembly workshop, and Li Tianfeng has to take a look at some key parts in person before he can rest assured.

After all, this is a 150-hour long-lasting test, after such a long time of testing, some parts are difficult to guarantee that there will be no problems, the key is to see what type of problems these occur, whether they are within the normal range, or beyond the normal range, whether they are abnormal problems.

If there are a large number of abnormal problems, 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 inspectors were carefully inspecting the parts, and Li Tianfeng and Zhou Wensheng walked towards the inspection area together.

Qiu Wenan soaked in the inspection area as soon as he got to work this morning, and Qiu Wenan was personally inspecting some key parts, holding such parts one by one, taking a look at them from time to time, and recording them from time to time, recording some things in the notebook he brought.

Li Tianfeng is extremely familiar with this engine, and knows that after 150 hours of long-term test run, he should look at some key parts, and which parts he does not need to see in person, and these inspectors can check it.

Li Tianfeng's first thing to look at is those bearings, aero engines, the requirements for bearings are extremely high, this engine should have used very good quality imported bearings, but due to restrictions, the use of domestic bearings.

Considering that the quality of domestic bearings is generally a little worse than that of similar imported bearings, in the design of the engine, Li Tianfeng has considered the full design and fully filtered the lubricating oil.

The quality of the bearing is mainly in the wear, and the wear of the bearing has a great relationship with sufficient and reasonable lubrication, in addition, the lubricating oil must be clean and pure, and there can be no impurities, especially no tiny metal chips.

With these factors in mind, the engine has been designed with sufficient cooling of the bearings and multiple oil filtration devices.

However, considering that it was a domestic bearing, Li Tianfeng still didn't dare to be careless, and with white gloves, he picked up a main bearing boy and looked at it carefully.

………

Today, the third watch continues, and the second watch is sent!! (To be continued......)