Chapter 318 Saved an engine!
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.
"Little comrade, which unit are you from? Why do I feel like I've never seen you before?"
Yang Wei looked at the person who volunteered and felt a little strange.
Logically speaking, such a distinctive person should leave an impression upon meeting him.
"My name is Lin Hui. I am an engine structural design researcher at the 606 Institute. I was seconded to the flight test station here last month to carry out ground testing and first flight related support work for Project ."
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 from the side.
Lin Hui, who had already started to change his work clothes at this time, 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 many opinions on his decision to completely overturn the high-pressure compressor design and start over. But later It proves that Chang Gong’s decision is completely correct.”
"So this time I believe that there is nothing wrong with the conclusion he gave, but I think some comrades still have concerns about the judgment of regular workers. Aircraft disassembly and maintenance is a delicate job, and we cannot 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.
Within a few seconds, the whole person had completely crawled 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 intake must block people.
A few minutes of silence followed.
"There are some...strange...white marks on the surface of the fan blades!"
"It's also on the inner wall deep in the intake duct. The condition of the low-pressure compressor...can't be seen clearly..."
The sound coming from the air intake had a very thick 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 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 marks 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. You can take a look when I go out later..."
A few minutes later, Lin Hui, who was already sweating profusely, finally emerged from 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 a little with his finger and put it in front of his eyes, frowning and observing.
"Like metal scraps?"
Someone soon guessed.
Zhou Ziquan, director of the flight test station, felt dizzy immediately, and then stood up and assured categorically:
"I guarantee with my party spirit and personality that there are absolutely no foreign objects in the test workshop. We have even controlled the dust indicators, and metal debris is absolutely impossible!"
Regarding this point, before the test drive started, everyone personally checked it. 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 metals, and if so, what metals they are."
Although Xue Chishou was also under great pressure that could be seen with the naked eye, he still gave the command calmly:
"The remaining people, take the aircraft back to the assembly workshop and prepare for a thorough investigation!"
That was the end of the matter, and no one expressed any further 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. Xue. After inspection, it was found that different amounts of white powder were found on the engine fan blades and the first two stage blades of the low-pressure compressor. After cleaning, they were inspected and no obvious signs of damage were found."
"The fourth-stage blade of the AL31FN low-pressure compressor corresponds to a set of casing processing annular chambers with 400 skews, so we cannot disassemble this part for the time being. However, considering that the surface of the third-stage blade is normal, it indicates that the on-site treatment is timely. , the impact was controlled within a very small range.”
The report by Xu De, the person in charge of the general assembly, immediately relaxed everyone's tense hearts.
Regardless, there was no irreversible fatal damage to the engine.
The results of the tests on those powders came out almost at the same time.
“这些粉末是钛铝合金碎屑，主要成分是Ti-8Mo-8V-2Fe-3Al，还有Ti-6Al-4V。”
Lin Hui handed the test report 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 large-sized debris with a particle size of about 1 mm at the end of the inlet. If the experiment was continued at that time, , if these debris enter the engine, the consequences will be disastrous."
Liulika has only delivered the first batch of two AL132FNs to Factory 31. 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 ground testing, 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 feel so too."
"I agree!"
"..."
This 606 Institute engineer (whose name is not Lin Hui, of course) who took the initiative to ask to go in and inspect the engine blades after the first test run is real. It can be said that in reality, this person's carefulness largely saved the life of the engine. If the first prototype of the J-10 takes to the skies with this very hidden problem, the consequences may not be as simple as destroying two engines. I pay tribute to these senior engineers.
