Start with the aviation industry

Chapter 196

The military representative picked up the phone on the table and called.

The phone rang for a long time but no one answered, he said helplessly, "Mr. Zhong, there is no one answering the phone in Mr. Lin's office."

Zhong Ziming said, "Then call He Hua, this matter must be reported to Leihuo Technology Industry Group in time."

"Well, I don't know how they reacted to the news. I hope they have an alternative plan. If there is no alternative plan, it will be troublesome."

"Mr. Zhong, I guess their alternative plan is to use domestic bearings, but there is still a certain gap between our domestic bearings and imported ones."

"Yes, the gap is not small. Firstly, it is reflected in the service life. If imported bearings are used, the life of the LH1500 turboshaft engine will be at least 3000 hours in the first turnaround period. If domestic bearings are used, the lifespan of the first turnaround period will drop sharply. Up to 1000 hours, maybe even 800 hours."

This is hard to accept.

Such a good turboshaft engine has an output power of 1526 kilowatts, and the military has high hopes. If the lifespan of the first turnaround period is only 800 hours, Zhong Zimin really does not want to see this situation.

The military representative also sighed softly, and then dialed He Hua's office. After a few rings, the phone was connected.

"Mr. He, I am the representative office of the General Army of the Phoenix Factory. There is a situation that I must inform you about."

He briefly explained the situation.

I thought He Hua would have a big reaction, but I didn't know that the other party's tone was very calm, "Well, I see, thank you Representative Zhao."

After hanging up the phone, Representative Zhao was stunned for three to five seconds, then shook his head with a wry smile. Mr. He's nerves are really thick, and he was so calm about such a big matter, which can be said to be calm.

Zhong Zimin walked back and forth in the office, thinking about countermeasures in his mind.

Shall I go to Leihuo Technology Industry Group in person?
Should I go to the capital again and ask the higher authorities to contribute and try to buy a few more sets of imported bearings.
After a while, another military representative knocked on the door and came in, reporting, "Mr. Zhong, according to your instructions, today I mainly understand the production progress of Leihuo Technology Industrial Group's first verification machine."

"So far, 102 parts with drawing numbers have been manufactured and put into storage, and 326 drawing numbers are being manufactured."

After reporting the situation, he analyzed, "Mr. Zhong, based on this progress, the verification machine may be ready for final assembly by February or March next year, which is at least three months faster than we predicted. "

It's a good thing that the process is ahead of schedule!

But Zhong Zimin couldn't be happy, and walked around the office with his hands behind his back, his brows furrowed even tighter.

He's under a lot of pressure.

The rapid progress of the verification machine means that many sets of imported bearings will be needed in the future, but the Japanese company has already cut off the supply.

Do you import aviation bearings from European and American companies?

Is it very big, they are estimated to be banned.

Imported from the Soviet Union, or imported from other countries.
Zhong Zimin thought about the countermeasures in his mind, and finally he felt that there was only a glimmer of hope for importing from the Soviet Union, and the hope of importing from other countries was almost zero.

Phoenix Office.

Wang Tianfang found Zhong Jianming with these bearings and explained his purpose. Zhong Jianming immediately showed great interest.

Especially after reading the quality inspection reports of these bearings, I became more interested. "I can't believe that there are companies in our country that can produce such high-grade aviation bearings. Then I must have a good inspection."

Wang Tianfang said, "I can't believe it a bit, but Mr. Lin gave me these bearings. He suggested that Turboshaft [-] should use such bearings in the future. I really have some expectations for their quality."

Zhong Jianming said, "I hope so. If the data in this quality inspection report is really the same, it will be the luck of the domestic aviation industry. From then on, we can basically declare the end of the history of importing high-end aviation bearings from abroad."

The two went to the laboratory with great interest.

Phoenix has a complete laboratory system, including several professional laboratories, including a very professional bearing laboratory.

In addition to the professional bearing laboratory, there are also professional bearing testers, and even professional technicians who conduct closed-door research and design of bearings.

Wei Wenchang is a professional bearing designer and senior engineer. He happens to be testing the imported bearings of No. 40 machine in the laboratory.

Unit 40 is a turboshaft engine independently designed and developed by Phoenix Institute, with a design power level of 1000 kilowatts. It is currently in the pre-research stage, and the design, development and verification of some key technologies will start.

"Mr. Zhong, Mr. Wang."

Seeing Zhong Jianming and Wang Tianfang coming in, he stopped what he was doing and greeted them proactively.

Zhong Jianming said, "You are testing the performance of the imported bearings of the No. 40 machine."

"Yes, what is going on is the residual rotation detection."

In addition to the relatively high appearance requirements, the aerospace bearings are required to be very smooth and free of defects, and there are many other performance indicators.

For example, the flexibility of the bearing, which mainly depends on the residual rotation detection, is to accelerate the bearing to a certain level, and then let the bearing stop slowly by its own rotational inertia. The residual rotation time of imported aviation bearings is generally required to be greater than 40 seconds.

In addition to the remaining rotation, there are bearing life, load and so on.

Zhong Jianming is the chief designer of the No. 40 engine. He is very concerned about the pre-research of this engine, and pays more attention to the situation of the imported bearings of this engine.

"Wenchang, how is Yu Zhuan doing?"

The main bearing of the No. 40 machine is on this bearing residual rotation test equipment, which is imported from France. The price of such a bearing is as high as more than 2 yuan.

This is also the most expensive imported bearing of the No. 40 machine.

In 1991, what was the concept of more than 2 yuan, it was simply a sky-high price bearing!
But there is no way, you need such aviation bearings, and domestic production is temporarily unavailable, so you can only hold your nose to recognize it, no matter how expensive it is, you have to buy it.

How is the quality of such an expensive imported aviation bearing?

Wei Wenchang replied, "The residual rotation of this main bearing has been measured, and it is 46 seconds, which is completely qualified. Next, we are going to conduct the residual rotation test of the second main bearing."

Zhong Jianming waved his hand and said, "Pause for a while and measure the residual rotation of these bearings."

At this time, many people finally noticed that Mr. Zhong had brought a cardboard box with several brand new bearings inside.

What kind of bearing is it that Mr. Zhong can bring it here in person, and Mr. Wang also follows him in person.

Many people gathered around, looking at these bearings with relish.

"This should be an imported aviation bearing."

"Of course that's for sure. Didn't you see that the two big leaders came here in person?"

"I suddenly had a little expectation that the quality of these bearings should not be bad."

"."

The two big leaders personally brought the bearings to do the quality inspection, which immediately aroused the interest of many people, and soon surrounded by more than a dozen people, including ordinary experimenters and technicians in the laboratory.

Wei Wenchang is a bearing manufacturer and a senior engineer. He also became interested and took a look at one of the bearings.

"Mr. Zhong, this should be an imported aviation bearing."

Zhong Jianming said, "Wenchang, you missed your mark this time, they are all domestic bearings."

what!
Domestic bearings! ! !

Including Wei Wenchang, the onlookers were slightly disappointed. They thought they were imported bearings. Everyone wanted to see what the imported bearings brought by the two big leaders would look like.

"Mr. Zhong, don't lie to me. Why do I think they are imported bearings?"

"They are indeed domestic bearings, and they are guaranteed to be replaced if they are fake." Wang Tianfang said.

Both leaders said that it is a domestic bearing, so it must be a domestic bearing.

The onlookers were further disappointed, and even three or five people left and returned to their jobs.

In the early 90s, and even at the end of the 90s, there was still a big gap between domestic aviation bearings and imported aviation bearings.

Everyone knows this very well. Since it is a domestic bearing, there is no interest in it, what should be done, or what should be done.

"Hey, these bearings look familiar."

"Yes, I think they are like the bearings of the turboshaft eight."

Finally someone recognized these bearings. After all, they are engaged in bearings, and they often touch the bearings of the turboshaft eight.

Wei Wenchang also discovered this, and recognized them as the bearings of the eighth turboshaft. He picked up a bearing, turned it quickly, and put it to his ear to listen.

Then, he looked carefully again.

No matter how he looked at it, he didn't think it was a domestic bearing, but the two leaders said it was domestic, so he became more confused, and even took a look at Zhong Jianming and Wang Tianfang.

Zhong Jianming said with a smile, "It's really a domestic bearing, let's do the idle rotation test first."

Wei Wenchang took the bearing and looked at it again, and then began to do the overturning test. He did not ask the tester next to him to do it himself.

After a little preparation, he loaded the bearing on the test equipment, everything was correct, and he pressed the start button himself.

The test equipment started working.

The bearing also rotated rapidly.

Everyone looked at the digital display on the test equipment, and watched the speed of the bearing increase rapidly, until it reached a speed of [-] revolutions per minute.

There are technical requirements for aviation bearings. Under the condition of idling at 40 revolutions, the remaining rotation time should not be less than [-] seconds.

How many seconds will the remaining rotation of this bearing be.

The acceleration stops, and there is no force to accelerate the bearing, and the bearing starts to rotate freely by its own inertia.

Timing begins!
Although this is a domestic bearing, everyone is quiet and wants to see how much the remaining rotation time is.

Many people estimated in their hearts that it might be 30 seconds, but it should not exceed 35 seconds.

what!
I don't know who lightly "huh" all over the body, gradually, many people showed surprise on their faces.

The remaining rotation time has passed 40 seconds, and the speed of this bearing is still relatively fast, and it is still rotating at a relatively fast speed.

45 second, 50 seconds, 60 seconds.
Oh my God!

It didn't stop completely until 67 seconds.

Quiet!

Very quiet!
Many people were stunned, even Wei Wenchang was the same. It took him a long time to react, and he said loudly, "It has reached 67 seconds, it's unbelievable!"

"Yeah, the first time I've seen a bearing with an idle time of more than 65 seconds!"

"My eyes must be blurred, pinch me quickly."

"Is this really a domestic bearing? Imported bearings can't reach this level."

"."

After a short period of silence, the whole scene completely fell silent, and those who had originally left ran over quickly.

"Is it really 67 seconds?"

"It's a pity. I actually left just now and didn't see the test results with my own eyes."

Both Zhong Jianming and Wang Tianfang showed surprise, they looked at each other quietly, and nodded slightly at the same time.

They basically agree that Lin Feng is not bragging at all, these bearings should be the same as the data on the quality inspection report they carry.

"Wenchang, make a second bearing." Zhong Jianming reminded.

Wei Wenchang nodded lightly, took off the bearing on the laboratory equipment, and replaced it with another bearing. After checking it was correct, he started the equipment himself.

The originally noisy scene quickly quieted down.

Everyone's eyes were fixed on the speed display on the test equipment, watching the bearing's speed hit [-].

Then, the bearing starts to rotate by its own inertia.

start the timer!
20 seconds, 30 seconds, 40 seconds.
It didn't come to a complete stop until 62 seconds.

62 seconds!

Although it is 67 seconds worse than the 5 seconds of the bearing just now, this kind of residual rotation data is already very amazing, and most imported bearings are difficult to exceed the 60-second mark.

"My God! Unbelievable!"

"Eye-opening!"

"This is a bearing produced by a domestic company. The quality is too good. It completely crushes imported bearings."

"It would be great if our No. 40 machine could use such bearings."

"."

The quiet scene gradually became lively again, Zhong Jianming and Wang Tian felt relieved, and both of them laughed happily.

They didn't need to look at the subsequent tests to know the situation. They should be similar, and the two left happily. The follow-up rotation test, life test and load test, etc., can be handed over to Wei Wenchang and the others.

The two walked out of the laboratory side by side.

As they walked, they chatted happily.

"Our President Lin released another large satellite, and actually produced such an excellent aviation bearing."

"Yeah, Super David!"

"Mr. Zhong, give me a copy of the test data after it comes out. I must convince everyone that our turboshaft [-] will use such bearings in the future."

"Our No. 40 machine will also use such bearings."

in the office.

Lin Feng is still continuing to draw the design drawings of a key part of this transport helicopter. So far, he has drawn the design drawings of [-] to [-] key parts one after another. After drawing a few more, Lin Feng decided not to draw them himself. Instead, focus on guiding everyone to design.

Because he had to draw the design drawings himself, Lin Feng did not go to the Phoenix Institute with Wang Tianfang to see the quality inspection results of these bearings.

Holding a pencil and a ruler, Lin Feng seriously drew the design of a key part of the transport helicopter.

From morning to afternoon.

When this design drawing was almost completed, there was a knock on the office door, Lin Feng put down the pencil and ruler in his hand, and said loudly.

"come in!"

At first I thought it was Wang Yalong or He Hua, but I didn't know it was Zhong Zimin who opened the door.

Lin Feng said in surprise, "Mr. Zhong, why don't you call me when you come in person, come and sit on the sofa."

While talking, Lin Feng brewed two cups of hot tea with his own hands.

At this time, Lin Feng finally found that Zhong Zimin seemed to be in a low mood, and his brows were slightly frowned, as if he was full of things on his mind.

"Mr. Zhong, what's wrong with you?"

Zhong Zimin sighed softly, "Boss Lin, the situation is not good, you have to be prepared enough."

Hearing this, Lin Feng's heart skipped a beat, realizing that something serious might have happened, or something very difficult.

"Mr. Zhong, tell me, what exactly is it?"

"Mr. Lin, you entrusted us to import the bearings of the LH1500 turboshaft engine from abroad, and a total of 5 sets have arrived. How long can these bearings last?"

Lin Feng didn't know why Zhong Zimin asked these questions. Since he was so serious, Lin Feng replied with a straight face, "If there are five copies in total, it won't last long. At least one copy is needed for the verification machine, and one copy is required for the prototype machine. Then the remaining three copies are definitely not enough for small batch production.”

Zhong Zimin sighed again helplessly.

"That's troublesome!"

"Mr. Lin, do you know that the bearing company in Japan has made it clear that it will no longer sell aviation bearings to us, and the supply has been cut off!"

"How can they break the confession? Is there any spirit of contract? It's like turning your back on you."

Zhong Zimin's voice was loud, he seemed very angry, and he complained a lot.

Gradually, Lin Feng understood what was going on.

It turned out that Zhong was always worried that the imported aviation bearings of the LH1500 turboshaft engine would be cut off, which would affect the production of this engine.

This kind of worry is a little superfluous.

Lin Feng looked relaxed, "Mr. Zhong, if they don't sell it, don't sell it. I don't want to buy it yet. The quality is not good, and it's expensive."

what!
Zhong Zimin stared blankly at Lin Feng, and finally came to his senses after three or five seconds, and said pleasantly, "Boss Lin, maybe you have a solution."

Lin Feng said, "I have already made preparations. I bought a professional bearing manufacturing company in Shenhai City. They have already produced bearing samples for this turboshaft engine. The quality is good."

"You may not have imagined that the aviation bearings produced by this company can at least reach the world-class level. Our turboshaft engine will use the aviation bearings of this company in the future."

what!
After talking for a long time, it is a domestic bearing!

Zhong Ziming reminded, "Mr. Lin, compared with imported bearings, domestic bearings still have a big gap in quality."

Lin Feng said, "But this bearing company is an exception. The quality of the aviation bearings they manufacture is world-class, and they are fully competent."

If someone said that there is a bearing company in China that can produce world-class aviation bearings, he would definitely not believe it.

But when these words came out of Lin Feng's mouth, Zhong Zimin had a little faith and a little doubt, just half-belief and half-doubt.

Lin Feng saw his dubiousness, and said loudly, "Mr. Zhong, the samples of these bearings should be undergoing a comprehensive professional quality inspection in Phoenix, you can go and have a look."

really?
Zhong Zimin stopped drinking his tea and quickly got up and said, "Then I'll go over and have a look now."

(End of this chapter)