Start with the aviation industry

Chapter 205 Congratulations from all parties
The maximum power state of the engine!
This is the real test of the engine!

All of a sudden, no one spoke in the huge test drive room, only the sound of the engine working on the test drive came through the vacuum glass.

Some even felt a little nervous.

This is the maximum power state of the engine, nothing abnormal will happen, God bless, nothing will happen.

Lin Chao's expression remained the same.

Looking at the engine on the test bench through the glass, watching it work, I even found that the sound seemed to be louder and sharper.

The engine climbs from the full rated power state to the maximum power state, the throttle of the fuel regulator is opened to the maximum, and the power of the engine also reaches the maximum.

Start the countdown!
Maximum power state for 180 seconds!
That is a total of 3 minutes, which is also the requirements of the test run process regulations and test run manual.

"The maximum output power of the engine is 1738 kilowatts!"

"Fuel consumption is normal!"

"Oil consumption is normal!"

"Vibration is normal, noise is normal!"

"."

A sound of "normal" sounded in the test drive control room, and it could be heard that these test drive workers were a little excited!
everything is normal!
The time of 180 seconds was up soon, and Xia Yang said loudly: "Reduce the accelerator and return to the full rated power state."

After the engine reaches the maximum power state, according to the test process regulations, it is not to turn off the accelerator immediately, but to lower the accelerator to let the engine reach the rated power state first.

The engine returns to the rated power state and runs in this state for 5 minutes, then the engine is turned off.

The voice suddenly became quieter.

But no one got up, they were either looking at the various instruments and meters in the test drive control room, or looking at the engine on the test drive through the vacuum glass.

The verification test run has not been completed, and there is another very important content, that is:

Engine idle time.

According to the design and technical outline of the LH1500 turboshaft engine, the idle time of the engine must be greater than 150 seconds, which is two and a half minutes.

This is an important technical index to verify engine flexibility, lubrication degree, etc.

The engine has been turned off and there is no fuel supply, but it relies on inertia, whether it is the compressor rotor or the turbine rotor, it is still rotating at a high speed.

Time passed slowly, and the instruments and meters in the control room kept recording, and the engine speed could also be seen from the meters through the sensors.

The revs kept dropping, but didn't stop.

The time of 150 seconds has come, and the engine is still running, and many people let out a long sigh of relief.

It was not until 175 seconds that the engine stopped completely.

The quiet test drive room finally became lively, and some young technicians even cheered.

"Haha, our verification test run is complete!"

"It's so cool, the test run performance of our verification machine is perfect."

"The final turning time actually reached 175 seconds, which is a bit beyond my imagination."

"."

Xia Yang walked up to Lin Feng, He Hua, Wang Yalong, and Fang Anping, and reported loudly and excitedly.

"Mr. Lin, all leaders, the first verification test run of the verification machine has been successfully completed, please give instructions!"

Lin Feng said with satisfaction, "Everyone has worked hard, sorting out and summarizing all the data, Director Fang will hold an analysis and summary meeting, and review this verification test run."

Fang Anping said, "Okay, boss."

Lin Feng added, "The engine was transported back to the aircraft assembly workshop, disassembled and inspected, and a detailed inspection record was formed."

The completion of the verification test run is only the first step. Although the performance of this engine is perfect during the verification test run, there is still an important hurdle.

That is decomposition inspection.

After the test run is completed, the engine will be transported back to the aircraft assembly workshop for a comprehensive disassembly, decomposed into parts, and then carefully inspected, especially the parts of the turbine part, to see if there is any abnormality.

As a new engine, there will always be various problems after the first verification test, among which the turbo part is generally the biggest problem.

For example, whether the turbine disk and turbine blades are bluish, whether there are microcracks in the turbine blades, whether the seal teeth and seal rings are worn, and so on.

Not to mention whether there will be various problems in the disassembly inspection, at least this time the verification test run is still perfect.

The atmosphere in the huge test drive operation room was extremely warm. The leaders of Leihuo Technology Industrial Group, represented by He Huahua, congratulated Lin Feng one after another.

"Boss, congratulations, our turboshaft engine performed perfectly for the first verification test."

"Boss, congratulations, congratulations!"

"."

Facing everyone's congratulations, Lin Feng smiled happily, and said loudly, "The engine test performance is perfect, the main credit is on everyone, thank you."

Outside the test drive building.

Many people have been paying attention to this test run. After all, this is the first test run since the test bench was built, and it is also the first test run of Leihuo Industrial Group.

"The test drive seems to have stopped, and I don't know what the result will be."

"Bodhisattva bless, we must pass smoothly."

"I don't know if we can go and see the test drive now."

"."

The workers in the test run workshop, the managers, and even the technicians who failed to get to the test drive control room kept their expectations and were a little bit worried, and their hearts were still hanging.

Someone with sharp eyes shouted loudly, "Come out, come out, Mr. Lin and the others have already come out."

Surrounded by everyone, Lin Feng had already walked out of the test vehicle workshop, and started to get in the car to leave. After a while, several vehicles left the test vehicle workshop area.

After Lin Feng and the others left, the test car workshop area became completely lively, and an older worker asked loudly.

"Director Xia, how is the test drive going?"

This also asked what everyone wanted to ask the most. Many people looked at Xia Yang, waiting for his answer.

Xia Yang was very happy, and with a relaxed face, he replied loudly, "Our first verification test run is perfect, and it has been successfully completed. After about half an hour, the engine will be transported back to the aircraft assembly workshop."

what!
The test drive was perfect!

The news spread all over the test car workshop, and many people excitedly discussed it. The workers and technicians who participated in the test car became popular. Basically, there were quite a few people around everyone who were asking questions. The test drive at that time.

It didn't take long for the entire test workshop to become a sea of ​​jubilation, and even the air was filled with festive flavors.

Go to work in the afternoon.

Within a few minutes after Lin Feng sat down in the office, there were phone calls, and then within an hour, they were all congratulatory calls.

The leaders of the Phoenix Factory and the military all called to congratulate Lin Feng.

Wang Tianfang also called.

"Mr. Lin, I heard that you have successfully passed the first test run of the verification machine. Congratulations, I extend my warm congratulations to you."

Lin Feng smiled happily, "Mr. Wang, you are very well informed, and you got the news so soon."

Wang Tianfang said, "This shows that everyone is paying attention to this demonstrator. From the beginning of design to the test run of the demonstrator, in less than two years, you have created a record in the domestic aviation industry."

Such a speed is estimated to be only available during World War II. It is difficult to achieve such a speed in peacetime, even for those world-class aero engine giants, it is difficult to achieve such a fast speed.

Lin Feng said modestly, "This is inseparable from everyone's efforts and the support of all parties. For example, your factory has helped a lot during the component verification stage."

After chatting for a few words, Lin Feng also briefly talked to Wang Tianfang about the test drive situation this morning.

After hearing about the test run, Wang Tianfang expressed his congratulations again, and said confidently, "The test run is perfect, and there are no abnormalities in all the data. There shouldn't be any problems with the engine."

"Mr. Lin, if you pass the first test run smoothly and there is no problem with the engine disassembly inspection, then you have set another record."

Lin Feng said, "I hope so, and I don't want all kinds of problems after the engine is disassembled and inspected."

For a newly developed aero engine, there are usually various problems in the first verification test engine disassembly inspection. If there is no problem in the disassembly inspection of this engine, it will really set another record.

The two chatted for at least ten minutes, and Lin Feng hung up the phone several times when he heard calls from outside.

As soon as the phone was hung up, it rang immediately. What made Lin Feng a little excited was that the call was actually made by a big man in the military.

This is a little unexpected, and the surprise comes a little too suddenly.

Such a big military figure actually called himself. Apart from asking about the test run of this engine, he also congratulated Lin Feng and the entire Leihuo Technology Industrial Group.

After putting down the phone, Lin Feng found that his mood was still Peng Bai's, and it might be difficult to calm down for a while.

What a surprise!

This is also a great honor!

Looking at the whole country, it is estimated that there are not many people who can make such a big person call to inquire in person.

Lin Feng received several congratulatory calls one after another, including the leaders of the Phoenix Institute, and Zhong Jianming all called to express their congratulations.

Leihuo Technology Industry Group's LH1500 turboshaft engine successfully passed the first verification test run, and it is estimated that it will quickly spread throughout the domestic aviation industry.

Within a few minutes, after Lin Feng answered another congratulatory call from the capital, there was a knock on the office door.

Zhong Zimin came over in person.

As soon as he entered the office, he clasped his fists and said happily, "Mr. Lin, congratulations on passing the verification test. I heard that the test was perfect!"

Lin Feng got up and said enthusiastically, "Mr. Zhong, you came here in person, please sit here, and I will introduce you to the test drive in the morning."

The two sat down on the sofa in the reception area, Ding Haixia brewed two cups of hot tea and put them on the coffee table, and then gently backed out.

Lin Feng gave Zhong Zimin a detailed report on the test run in the morning, because he knew that besides visiting the door to congratulate Zhong Zimin, he also had another task, which was to understand the test run situation in detail on behalf of the military, and then he had to make a special report to the high-level military.

After learning about the test run in detail, Zhong Zimin congratulated Lin Feng again.

"Mr. Lin, congratulations. I'm really proud of you. From then on, our country finally has an advanced turboshaft engine that is at the same level as Western developed countries. This has also fulfilled many people's dreams of turboshaft engines."

"At this time, this turboshaft engine should have started to disassemble. Can I go to the disassembly site to have a look?"

"Of course, let's go together now."

Lin Feng has long wanted to go to the aircraft assembly workshop to take a look. Judging from the time, the engine should have started to disintegrate. At this time, it is estimated that it has already disintegrated into a unit state. It was only because of the continuous phone calls that He could not get out. It is impossible to go to the aircraft assembly workshop to see the condition of the engine.

The disassembly of the engine is much faster than the final assembly.

The final assembly of an engine may take three, five days, or even ten days and a half months, but if it is disassembled, it can be basically disassembled into parts in half a day, or even one or two hours.

Aviation engine assembly workshop.

Under the guidance of technicians, the workers are dismantling the engine that has completed the verification test.

First of all, disassemble the pipelines and lines outside the engine, and put all the dismantled metal pipes, wire harnesses, clamps, etc. neatly on the inspection table not far next to it, so that it is convenient for a comprehensive inspection.

After these things are disassembled, the unit body is disassembled. Under the guidance of the technicians, the workers disassemble step by step according to the process regulations.

There were many people around.

Qin Jianguo from the assembly workshop and other workshop leaders, Fang Anping from Leihuo Aero Engine Design Department, several design experts, and more than a dozen design backbones stood there watching the engine being disassembled step by step.

The accessory unit is disassembled from the engine first, then the reducer unit, and then the compressor unit.

The whole scene was relatively quiet, few people spoke, and everyone's eyes were on the engine.

When only the combustion chamber and the turbine unit were left, Qin Jianguo finally couldn't help but say, "Our engine is designed very scientifically. Not only is the assembly process excellent, but it is also very convenient to disassemble."

"Yeah, it didn't take long for it to be disassembled into a unit state. The speed is really not slow, much faster than I imagined."

The combustion chamber unit and the turbine unit were also disassembled, and this engine completely became a unit state.

Each unit is equipped with an inspection table, and each unit body will be disassembled into parts. Every part, especially the key and important parts, will be carefully inspected.

I don't know who said, "Look, Mr. Lin is here in person."

Really.

Lin Feng and Zhong Zimin were chatting and laughing, they had already entered the final assembly site and were walking towards this side.

Fang Anping, Qin Jianguo and several others stepped forward to greet him.

"Boss, you came here in person."

"Representative Zhong is also here."

Lin Feng nodded, glanced at the engine that had become a unit, and said loudly, "We are here mainly to see the status of the components after the test run of this engine. Let's disassemble the turbine unit first."

Generally speaking, the turbine unit is most likely to cause problems, because it is a high-temperature component, whether it is a turbine blade or a turbine disk, etc., not only must work in a high temperature environment of hundreds of degrees, but also output a strong power.

Qin Jianguo personally ordered, waved his hands and said loudly, "Proceed with the disassembly of the turbine unit."

Everyone went to the inspection table where the turbine unit was placed. This inspection table was about 1.5 meters wide and four or five meters long. The table was covered with rubber skins, mainly to prevent parts from being damaged by bumps.

Everyone gathered around the inspection table, and several workers began to disassemble the turbine unit under the guidance of the technicians.

The first step is to remove the tail section of the turbine unit, and then take the free turbine out and set it aside.

Many people's eyes fell on the Freedom Turbine, and Lin Feng and the others took a few steps forward and took a serious look.

"Boss, it looks relatively normal, without any bluish phenomenon."

Lin Feng was wearing white gloves, holding the free turbine in one hand, and a small flashlight in the other, and looked at it seriously, "There is indeed no problem on the outside, but the final result is based on the fluoroscopic examination."

Fluorescence inspection is a kind of non-destructive inspection, which mainly checks whether there are defects such as cracks on the surface of the workpiece.

Turbine disks and turbine blades must undergo fluoroscopic inspection in the end, and only those who pass the fluoroscopic inspection can be considered final qualified.

The second-stage turbine disc, second-stage guide vane, sealing ring, sealing teeth, etc. were disassembled one by one.

Including Lin Feng, Fang Anping, Zhong Zimin, and several experts from Leihuo Aero-Engine Design Institute, all wearing white gloves, picked up these parts and inspected them carefully.

"No bluishness."

"Slight contact wear on seal ring and seal grate, but well within normal limits."

"Everything seems to be normal, and no problems have been found for the time being."

"."

The turbine unit was finally disassembled into parts, and even the turbine blades were removed from the turbine disk, and placed neatly one by one on the inspection table.

Everyone checked carefully, and then walked to the inspection table next to the combustion chamber.

Lin Feng didn't leave the aero-engine assembly workshop until after five o'clock in the afternoon, where he personally saw many key points and key parts.

Including Lin Feng, no problems have been found for the time being.

Walking out of the assembly workshop, Zhong Zimin looked very happy, "I can't believe that there are no problems."

Lin Feng said, "In the end, we need to measure the size and fluoroscopy. If there is no problem with these, then there is really no problem."

Zhong Zimin said, "There is no problem with the appearance, not even the slightest bluish phenomenon. I don't think there should be any problems."

Lin Feng said, "I hope so."

As he wished, Zhong Zimin not only learned about the test run in the morning, but also personally watched the disassembly of the engine in the assembly workshop, and left Leihuo Technology Industrial Group happily.

Even though it was already dark when he returned to Phoenix Factory, he still picked up the phone on his desk and called.

"Chief, I want to make a special report to you."

There are only [-] words today, but I still hope that everyone will vote for a few monthly votes to support this book.

(End of this chapter)