Military Heavy

Chapter 194 Embroidery on Steel Plate

Yang Fan has been on a business trip for the past few days. Together with Zhou Ping, the director of the weapon system design office, he went to a certain weapon equipment research institute and had a technical exchange with the other party on the HHQ-7 missile.

On the future No. 2 ship, the HHQ-7 missile will replace the "Sea Sidewinder" air defense missile imported from France.

This is also the difference between the No. 2 ship and the first ship. In addition to using domestically produced air defense missiles, some other equipment is also considered to be domestically produced, including electromagnetic interference equipment.

Yang Fan just sat down in his office not long after he came back.

Zhao Yulan opened the door and came in to see Yang Fan, with a look of surprise on her face, "Director Yang, you are back."

Yang Fan said: "I just came back, there is nothing going on in the institute these days."

"Our place is normal, nothing major happened, but Donghai Shipyard encountered trouble. After the first ship's power system was installed, the first test run was carried out two days ago. It turned out that the bearing bush of the drive shaft was quite worn."

"Donghai Shipyard immediately organized a force analysis and investigation of the cause, but it has not been able to find out where the problem lies. The chief builder Chen probably got a little anxious, so he came here yesterday to find the chief engineer. Today, Li Zhengjun, the deputy director of the power system design office I went to the Donghai shipyard early in the morning, and I don’t know what’s going on?”

Li Zhengjun passed by early in the morning!

Hearing this, Yang Fan fell silent, sweating for Donghai Shipyard.

I thought to myself, Li Zhengjun has a good level, he was promoted to the deputy director of the power system last year, and he is technical. I hope he can solve this problem with Donghai Shipyard in the past.

Of course, Yang Fan is very familiar with the power system of the 052 ship.

It adopts the current very advanced diesel-fuel combined power system, which is the first in China. If the two LM2500 gas turbines are turned on, it can provide powerful power for the 052 ship, and the maximum speed can exceed 32 knots.

The powertrain is nice, but also demanding.

Not only imported high-speed diesel engines with excellent performance are needed, but also marine gas turbines are needed.In addition to these, there are high requirements for installation.

One of the installation techniques is called "shafting alignment". If the power system is the heart of a ship, then this technique is more delicate and complicated than heart bypass surgery. Without a strong technical level, it will definitely not work.

The error of the shafting displacement cannot exceed 0.05 mm, which is equivalent to a hair. If it exceeds this standard, it means that the installation has failed.

After reaching the installation standard, it must also pass the test run inspection. If there is a problem in the test run, it also means that the installation has failed.

Such high requirements can be said to be embroidery on steel plates.

The first test run of Donghai Shipyard failed, and the bearing bush was worn out.

Yang Fan prayed, hoping to succeed next time, Donghai Shipyard can solve this problem perfectly.

East China Sea Shipyard.

Li Zhengjun, deputy director of the power system design office, brought several technicians here, including Han Jiang. Under the leadership of Zheng Xianxue, everyone boarded the 052 ship.

Zheng Xianxue said: "Before the test run, we checked carefully, and all the data were normal, but after the test run, we found that the bearing bushes were worn out, which is really evil."

Li Zhengjun didn't say anything, just listened carefully.

After a while, several people went to the power cabin and saw the entire power system installed, including two diesel engines and two gas turbines.

Zheng Xianxue said: "We have replaced the bearing bush with a new one, and re-inspected all the dimensions, including the deviation of the shaft system. Take a look."

After speaking, take out the test report.

After receiving it, Li Zhengjun looked at it carefully, almost every item of data, especially the deviation of the shaft system.

The shafting deviation is required to be within 0.05 mm, and the deviation on the test report is 0.042 mm, which is completely within the qualified range.

After reading it, Li Zhengjun reminded: "The deviation of the shafting is still a little big. 0.042 mm is an upper deviation. It is best to adjust it within 0.035."

Hearing this, Zheng Xianxue showed hesitation.

He is a technician, and he knows that the smaller the shaft deviation, the more difficult it is to adjust. The shaft deviation of 0.05 mm is extremely demanding, and it is more delicate than the heart bypass procedure. It took a lot of effort for them to control the shaft deviation to 0.042 mm. Big effort.

Then adjust from 0.042 to within 0.035, although it is only seven thousandths, but it is extremely difficult to adjust every one thousandth, which is the reason for his hesitation.

Of course Li Zhengjun also knew this, and reminded: "I know that it is quite difficult, but if you want to ensure that the bearing bushes are not worn out and the test run is successful, I think this is the only way to do it."

Ok.

0.035 is 0035.

Zheng Xianxue could only nod in agreement.

Not long after, two technicians and two workers began to fine-tune the installed shaft system, measuring while fine-tuning.

This is delicate work and takes time.

Zheng Xianxue simply took Li Zhengjun and others off the ship, temporarily returned to the Engineering Technology Department, took a short rest, and held a meeting where everyone exchanged ideas.

Sitting in the meeting room, blowing on the electric fan, Han Jiang quietly breathed a sigh of relief, and said in his heart, it was really hot on the ship just now, my clothes were a little sweaty, and the temperature in the power cabin was at least 37 degrees .

It is worthy of shaft alignment.

It took several hours to adjust the shafting deviation from 0.042 to within 0.035. It is already night and the entire construction berth is brightly lit.

The same is true in the power cabin, with bright lights.

The two technicians finally let out a long sigh of relief. After some hard work, the deviation of the shafting was finally adjusted to within 0.035mm.

A worker said with a sigh of relief: "Luo Gong, come and take a look. I have measured that the shaft deviation is exactly 0.035, which meets the requirements."

The middle-aged supervisor technician called "Luo Gong" walked over, looked at it, measured it himself, nodded and said: "The shafting deviation is indeed only 0.035, which finally meets the requirements. This trip has exhausted us. .”

Another technician in charge said: "Finally, we can do business."

A happy and relaxed atmosphere pervades the power cabin.

Not long after, the news reached Zheng Xianxue.

He had just finished dinner with Li Zhengjun and a few others, and when he learned that the deviation of the shaft system had been adjusted within 0.035mm, he waved his hand happily for a while.

"Director Li, we have adjusted the shafting deviation to within 0.035, and we are ready for a test run."

Li Zhengjun and others did not go back to the Donghai Institute at night, but they have been waiting for the adjustment results of the shafting deviation. Once the adjustment reaches within 0.035mm, they can start the test run immediately.

"Really, that's great!"

After waiting for so long, he suddenly heard that the deviation of the shaft system had been adjusted within 0.035 mm, and Li Zhengjun immediately became happy.

The others were similar, each with a happy face, and someone said confidently: "The deviation of the shaft system is within 0.035. There must be no problem in this test run."

Under the leadership of Chen Shaohua, our group went down to build the berth, boarded the Type 054 guided missile destroyer, and took a look at the power cabin in person.

Feeling that everything is safe and there is no problem, Zheng Xianxue gave the order for the test run, "Carry out the second test run, and everyone is in place."

Soon, the powertrain kicks in.

The outfitting of the 054 ship has entered a critical stage. Even at night, many workers are busy, and the entire construction berth is brightly lit.

Many workers are also willing to work at night.

why?

Very simple, cool at night!
It is very hot during the day. Under the scorching sun, the temperature of each cabin in the ship can reach 38 degrees, or even 40 degrees. At night, it is at least ten degrees lower, especially in the second half of the night, when the temperature can reach about 25 degrees. .

"It seems like the powertrain is on again."

"Well, I feel it too."

"I heard that the bearing bushes were worn out during the first test run. I don't know what will happen this time."

"I hope there will be no problems."

"."

Many workers who were doing outfitting felt the start of the power system and chatted like this one after another, both worried and hopeful in their hearts.

Because it was cool at night and could feel the cool breeze, Zheng Xianxue and Li Zhengjun did not enter the cabin, but were on the deck, chatting or smoking, waiting for the test results this time.

Some people were slightly nervous, worried that the test drive would fail again this time.

But more people are more confident that the shafting deviation has been adjusted within 0.035, and there should be no problems in this test run.

After a while, Chief Constructor Chen Shaohua and Deputy Chief Constructor Xie Xinjian all came. They heard that the second test run was going on, so they hurried over to have a look.

"How about it?"

As soon as he boarded the deck, Chen Shaohua asked.

Zheng Xianxue replied: "Before the test run, we worked hard and finally adjusted the shafting deviation to 0.035 mm. This time there should be no more problems."

Hearing this, Chen Shaohua nodded lightly, thinking in his heart, I hope this time it will be successful, if the bearing bush still wears out, then the problem is serious.

Yes, the shafting deviation has been adjusted within 0.035 mm, and there is still wear and tear. What could be the reason?Installation problems, or design problems, or other factors.

Such investigations may kill people.

After a while, everyone felt that the power system seemed to have stopped. Chen Shaohua waved his hand and said, "Come on, let's all take a look."

Our group arrived at the power cabin, and some people couldn't get in temporarily, so they stood outside the power cabin, tiptoed, and stretched their necks to look inside.

Han Jiang stood at the door of the power cabin. After looking inside, he said in his heart, fortunately, it was night and it was much cooler. If there were so many people crowded here during the day, it would be very hot.

How was the test drive?

Two technicians, holding tools in person, have already disassembled the transmission shaft there, preparing to remove the bearing bush and take a look at the condition of the bearing bush.

This is a new bearing.

The previous bearings had worn out after the first test run and were no longer usable.The newly replaced bearing bush is removed, if it is bright as new and there is no wear, it means that the test run is successful.

Today is the third update, and the second update will be delivered!

(End of this chapter)