Chapter 318 An engine was saved!
Everyone was attracted by the voice and turned their heads to find that the speaker was a particularly short and thin man.
If it were him, then "getting in and taking a look" seems to be a feasible option.
"Comrade, which unit are you from? Why do I feel like I have never seen you before?"
Yang Wei looked at the volunteer and felt a little strange.
Logically speaking, such a distinctive person should leave an impression upon meeting him.
“My name is Lin Hui, and I am an engine structural design researcher at the 606 Institute. I was seconded to the flight test station here just last month to carry out support work related to the ground testing and first flight of Project 10.”
The other party reported his identity.
"When Comrade Lin Hui was transferred here, Xiao Yang was at Beijing Airlines. It's normal that he hasn't seen him."
Xue Chishou also explained.
Lin Hui, who had already begun to change his work clothes, continued:
"In the second half of last year, I followed Chang Gong in the 606 Institute to perfect the design of the turbojet 14 compressor. At the beginning, we also had There were many opinions on his decision to completely overturn the design of the high-pressure compressor, but it turned out that Chang Gong’s decision was completely correct.”
“So this time I believe that there is nothing wrong with the conclusion he gave. I think some comrades still have concerns about Chang Haonan's judgment. Aircraft dismantling and maintenance is a delicate job, and we can't let everyone work with emotions."
These words made the real owner Chang Haonan a little embarrassed. .
But he also knew that at this time, Lin Hui's choice to stand up was quite beneficial.
In-situ inspection is the method with the least interference from external factors and the most convincing method, because the disassembly of the aircraft itself will inevitably have a certain impact on each component. Sometimes it is difficult to determine whether some small traces are from the test or the disassembly process. left in.
Soon, Lin Hui, who was well prepared, walked into the testing workshop with a flashlight and a camera.
A group of people followed closely behind.
I saw him looking at the rectangular air inlet of prototype No. 1001 for a few times, then holding up his hands, half of his body got in deftly.
In a few seconds, the whole person had climbed completely into the air intake.
It has to be said that the rectangular adjustable air intake still has obvious advantages at this time.
If it is a DSI, the bag at the lip of the air inlet must block people.
A few minutes of silence followed.
"There are some...strange...white marks on the surface of the fan blades!"
"There are also some on the inner wall deep in the inlet. The condition of the low-pressure compressor...can't be seen clearly. …”
The sound coming from the air intake had a strong echo, which made everyone's hearts sink.
Especially Xue Chishou and Song Wencong, the two of them almost lost their composure and lay directly on the side of the air intake.
The former even shouted directly inside:
"Xiao Lin, can you determine the nature of those white marks, are they injuries or something else?"
"Wait. For a moment..."
Lin Hui turned around with some difficulty, held the flashlight in his mouth, and used his free hand to wipe hard at the junction between the root of the air intake and the engine.
"These traces can be wiped off. They should be some kind of...powder. I can't see clearly whether there is any damage."
"I collected some white things and will go out later. You can take a look later..."
A few minutes later, Lin Hui, who was already sweating profusely, finally got out of the air intake again, holding a piece of paper in his hand.
“That’s it.”
There was some fine silvery white dust on the paper, mixed with some metal wires and the like.
"What is this..." Song Wencong dipped his finger into it and put it in front of his eyes, frowning and observing.
“Like metal scraps?”
Someone quickly guessed.
Zhou Ziquan, director of the flight test station, felt dizzy immediately, and then stood up and assured categorically:
“I guarantee my party spirit and personality that there are absolutely no foreign objects in the test workshop. We have even controlled the dust indicators, and there is absolutely no metal debris. Impossible! "
Regarding this point, before the test drive started, everyone did a personal inspection. As he said, the on-site environment fully met the test requirements.
"Anyway, this proves that the hidden danger does exist. Let's take these powders for testing first to see if they are metal, and if so, what metal they are."
Xue Chishou Although the pressure is visible to the naked eye, he still gives the command calmly:
"The remaining people, take the aircraft back to the assembly workshop and prepare for a thorough investigation!"
At this point, no one expressed any objections.
So the married daughter returned to her parents’ home in only half a day.
......
Witnessed by almost everyone who participated in the test, the assembly shop showed amazing efficiency and dismantled several important parts of the aircraft that night.
The top priority is naturally the engine.
Although Factory 132 does not have the ability to completely disassemble and assemble turbofan engines, it is not a problem to just disassemble and inspect several parts such as the fan and the first three-stage blades of the low-pressure compressor.
“Report to Mr. Traces. ”
“The fourth-stage blade of the AL31FN low-pressure compressor corresponds to a set of casing processing ring chambers with 400 chute, so we cannot disassemble this part for the time being, but considering the third-stage Everything on the blade surface is normal, which shows that the on-site treatment was timely and the impact was controlled within a small range."
The report by Xu De, the head of the general assembly, immediately relaxed everyone's tense hearts.
Regardless, there was no irreversible fatal damage to the engine.
The results of the testing of those powders came out almost at the same time.
“These powders are titanium aluminum alloy chips, the main components are Ti-8Mo-8V-2Fe-3Al, and Ti-6Al-4V.”
Lin Hui inspected the hands The report was given to Xue Chishou,
“From the composition point of view, it should be a mixture of TC4 alloy and TB3 alloy that are widely used in aviation fasteners. There were even particles with a particle size of 1 mm at the end of the inlet. There are large-sized debris on the left and right. If the experiment was continued and these debris entered the engine, the consequences would be disastrous.”
Liulika has only delivered the first batch of two AL31FNs to Factory 132. One is installed on Machine No. 1001, and the other is planned to be used in Machine No. 1003 being manufactured (No. 02 is a static testing machine and does not require subsystems outside the installation structure).
If one is scrapped during the ground test, then even the best result will have to postpone the subsequent first flight.
And if a serious accident occurs to the engine, it may even cause damage to the prototype itself, and the impact will be immeasurable.
After the summary report was read, the conference room fell into silence.
After a few minutes, someone finally spoke.
"I think we should let Chang Gong say a few words."
"I think so too."
"I agree!"
"..."
< br> This 606 Institute engineer (whose name is not Lin Hui, of course) who took the initiative to ask to go in and check the engine blades after the first test run is real. It can be said that in reality, this person's carefulness is to a large extent. The first prototype of the J-10 was saved. If it took to the sky with this very hidden problem, the consequences would probably not be as simple as destroying two engines. I pay tribute to these senior engineers
(End of this chapter)