Chapter 210 052 Destroyer's Propeller

Qin Tao, who was far away in Europe, didn't know that while he was leaving Mingzhou Shipbuilding Industry Group, they signed two more catamaran contracts, and the conditions were very favorable. However, although Qin Tao and Zhao Ling were on their honeymoon, , but still not idle, and also working hard for the development of the group.

Qin Tao works under the light. As a reporter, he has to fulfill his promise and write a special interview manuscript about the 209 submarine. Zhao Ling, the No. 1 electric submarine, drew all the large-scale 209 submarine design drawings based on her own memory.

　　When the two of them have finished all this, it will be daybreak.

“It was really a night of hard work,” Qin Tao said.

“I can guarantee that this design drawing is perfect. Brother Tao, with this, we can start construction ourselves, right?”

Hearing what Zhao Ling said, Qin Tao smiled and shook his head: "Of course not, it's still far from enough."

  Why? Zhao Ling looked at Qin Tao curiously.

"The weapons and equipment of any country have their own characteristics. We can use this drawing as a reference, but there is absolutely no need to copy it. For example, up to now, in our country, we still use double-hull submarines. Damn it, if you want the Navy's submariners to adapt to single-shell submarines, it will take a certain amount of time. Moreover, we only got a standard design drawing. We don't have many of the equipment on it, even if we build the shell. , the lack of many systems prevents it from having combat capabilities."

Originally, Zhao Ling was only engaged in anti-aircraft missiles. Later, she became a military representative and became more involved. Now, with Qin Tao, she has become a free helper in the shipyard. She has seen more things, and naturally There is a vision.

Hearing what Qin Tao said, of course she understood that a submarine cannot be built with only design drawings.

“Besides, we can’t make the shell because we don’t have a plate bending machine,” Qin Tao said.

 “Then shall we buy one?”

“Don’t worry, buy it now, the price is too expensive, we can pick up the junk later.”

Qin Tao is looking forward to picking up rags again. After all, Lao Maozi's huge empire will soon collapse.

At that time, the domestic navy will purchase Kilo-class submarines, and then obtain the information on Kilo-class submarines, combine these data, combine the East and the West, and finally create a submarine with its own characteristics.

 So, the current information is for reference only.

"It is better to send the information back in the name of Free Press." Qin Tao said: "This manuscript also has to be sent to the headquarters of Free Press. I guess I can still get a royalties."

 Dong dong dong!

At this moment, there was a knock on the door outside.

Vitalia had already come to look for them. When she saw the red circles in their eyes, Vitalia was shocked: "Last night, you..."

“I have written a manuscript, please publish it freely and send it out. Also, I want the manuscript fee!” Qin Tao said.

Vitalia smiled: "Of course this is no problem, I will do it immediately."

“I still have a few things, and I hope to send them back to China, at the same address as last time.” Qin Tao continued.

"good."

So, the design drawings carefully drawn by Zhao Ling were mixed with a pile of goods purchased from Germany and returned to China by express delivery.

Since you have come to Germany, of course you have to visit the capital of Germany.

"If I came here two years ago, I could only fly over and see the spectacular Berlin Wall. Now I can only go to the ruins to see it." Vitalia continued to give Qin Tao and Zhao Ling and the two acted as tour guides. At this time, they were riding in a Mercedes-Benz car on the road to Berlin.

Qin Tao was filled with emotion when he heard about the Berlin Wall. The most famous event during the Cold War was the collapse of the Berlin Wall.

 After the end of World War II, Germany, as a defeated country, was divided and occupied by the east and west sides. Berlin, the German capital, was also divided into two parts. However, due to various problems such as the system, many people in East Germany hope to live in West Germany. Once they go there, they will never come back.

This state of affairs has angered Lao Maozi and wants to run away? no way! Let's build a wall!

Just like the United States built a wall on its border to prevent Mexican illegal immigrants, Germany also erected a wall during the Cold War. Although it was called the Berlin Wall, it was actually erected at the entire border between East and West Germany. .

 Sadly, times are changing!

"Yes, the Berlin Wall is no longer there. If we get a few pieces of building materials from that time and collect them, we might be able to sell them for a lot of money in the future." Qin Tao said, "This is a witness to history."

Vitalia smiled: "Qin, your thinking will always be different from others. No wonder my father values ​​you so much."

 Qin Tao’s thinking is different, of course because he has decades of experience. This thing can really be sold at a good price if it is well hyped.

“Look, there’s a high wall over there!” Zhao Ling suddenly shouted.

“Yes, that’s the site of the Berlin Wall.” Vitalia said to the bodyguard and driver: “Let’s go and take a look.”

At that time, people were extremely angry and began to spontaneously demolish the Berlin Wall. Almost all the Berlin Walls in the busy city collapsed instantly, and only a few Berlin Walls remained.

When people found out that they wanted to commemorate history, only a small part of it was found, of which the longest section was between Berlin's Ostbahnhof and Oberbaum Bridge.

This section of the Berlin Wall has been preserved, and many painters painted here, forming a unique scene.

 Several people are strolling here.

"Why are pictures like this everywhere?" Zhao Ling looked at the scene of two men hugging each other and chewing, and was very curious. She had seen it when she was at Lao Maozi's place, and now, on the Berlin Wall, it actually Appeared again.

 “Because, this is history.” Qin Tao said.

 After visiting the Berlin Wall, it was another day of shopping. Qin Tao was a little curious. Zhao Ling was very selective when buying clothes. She didn't seem to like shopping for clothes in the past!

 Wait a minute, why did you start shopping for men’s clothing? You don’t seem to need any clothes, right? However, he could not resist the enthusiasm of the two girls, so soon his hands were full.

 That evening, after checking into the hotel, Qin Tao finally expressed his questions.

“Xiao Ling, you seemed to have never been so enthusiastic about clothes before.” Qin Tao said to Zhao Ling.

 “That’s because I ignored it before.”

 Neglected before? Qin Tao was a little puzzled.

"Our mother has become the director of a clothing factory and is busy working for the factory all day long. She plans to take the high-end route as you once proposed. Of course, she needs to have high-end styles. Buying these clothes is For our mother’s reference,” Zhao Ling said.

Qin Tao then realized that Zhao Ling was thinking about her mother-in-law, and he was immediately moved: "Xiao Ling, you are interested."

“I see there is a clothing exhibition recently. If we are free, we can go and have a look.”

Qin Tao nodded: "Well, of course. It would be great if we could bring back a master of fashion design."

"This is probably difficult. Europeans' aesthetics are different from ours." Zhao Ling said: "The clothes we bought are only for reference. Fashion design masters will also be acclimatized. "

 Qin Tao nodded, okay, you are right. After saying that, Qin Tao picked up the phone on the table.

 I haven’t contacted the country for several days. I’ll call back to check on the situation.

Qin Tao was instantly shocked by this question.

“What, signed a contract for two catamaran passenger ships? Thirty-five million? Okay, not bad, you guys are capable!”

“Mr. Qin, you have given me the award. It is all the result of Cong Gong.”

“You have to work hard. Passenger ships are different from warships. They must pay attention to luxury. You should do more research on the products of international counterparts.”

“What? The gantry crane has arrived? Let’s install it, yes. Just give them funds according to the contract.”

 “What? Sweden, Kameva Company has a mission? Okay, I understand.”

When he put down the phone, Qin Tao spread his hands helplessly: "It seems that our itinerary is going to change. I guess the task was given by our dad. The old man has spoken. We are in Europe again, so we have to go and have a look."

 “Well, it’s up to you.”

 “Let’s say goodbye to Vitalia tomorrow.”

On the afternoon of the next day, Qin Tao brought Zhao Ling to Kameva Company in Sweden. After separating from Vitalia, Qin Tao also used his original identity, so he soon met the person in charge here. Converged.

Jin Mao, an expert in the naval equipment department, is a top student who graduated from Harbin Institute of Technology. After graduation, he worked in the navy. Although he did not wear a military uniform, his many years of military career still made his every move look heroic, even if he wore glasses. It will make him look polite.

At this time, Jin Mao was frowning at the huge propeller that was several meters in diameter and glowed with a slight yellow metallic luster.

 In front of him, visible to the naked eye, there was black oil slowly seeping out.

“No, the quality of this variable-pitch propeller is substandard and cannot meet our requirements. It must be redone!” Jin Mao finally made up his mind.

After hearing his words, Rosenberg, the head of the Swedish Kameva Company, immediately shook his head: "This is not a big problem at all. Any variable-pitch propeller will leak oil. This is your first time coming into contact with a variable-pitch propeller. So I don’t know much about the technology inside. If you leak hydraulic oil, you can just refill it after you go to sea.”

 At present, domestic warships still use fixed propellers. It was not until the development of the 112 destroyer that the decision was made to use variable pitch propellers.

This concept of variable pitch appeared in the aviation field. In a propeller, there is an angle (pitch) between the center line of the hub and the center line of the blade. However, the angle of an ordinary propeller is fixed. , and this angle is variable. Choosing different blade angles according to different speeds can better maximize the efficiency of the propeller.

During World War II, aircraft propellers began to use variable-pitch propellers. By the end of World War II, the large plate on the top of the helicopter achieved different power outputs by changing the blade angle. The helicopter pilot pulled the helicopter up. This action was called a total lift. The distance is the handbrake-like handle on the left hand side, which is always inherited.

The propellers on ships have also begun to use variable pitch propellers. The earliest can even be traced back to the steam engine era. Because it is inconvenient to reverse the propeller, so the pitch is considered, so that the propeller blades are reversed, so that the vehicle can be reversed directly. .

(As mentioned before, reversing on a ship is very complicated. There are many benefits if you can omit the reverse gear. There are also readers who strongly objected. I will repeat it here. For designers, this reverse gear should be used if it can be used. !)

 Later, technology gradually developed and variable-pitch propellers became more and more common.

  Domestic research is also underway. In the 1950s, there were variable-pitch propellers equipped with 350-horsepower engines. Now the largest domestically produced propellers can be installed on engines with 9,000 horsepower.

  However, the gas turbine on the 052 warship can output tens of thousands of horsepower. It is not possible to manufacture such matching variable pitch propellers domestically. This propeller can only be purchased outsourced.

After all, this device can obtain various thrust values ​​from the maximum positive value to the maximum negative value by simply changing the pitch without changing the steering of the propeller and main engine. This can not only eliminate the need for a reversing device, but also It can shorten the reversal sailing time of warships.

 In the past, the captain of a warship shouted: Two cars, reverse at full speed! If it is equipped with a reverse gear, it will be very complicated. There is no clutch on the transmission shaft of the warship, so you have to stop the engine first, then wait for the gear in the gear box to stop, then switch to the reverse gear, then start the engine, and then fully power run. (This was the brainchild of East China Heroes. I don’t know if this is really necessary.)

 Now, it seems that 052 is about to be launched into the water, but the propeller is not there yet.

 The country is very anxious. Without a propeller, 052 cannot be launched into the water! Jin Mao brought someone over, and the other party took out the propeller, so Jin Mao hurriedly inspected it. Who would have thought that the "oil retention test" did not last for eight hours before oil began to leak!

Ordinary propellers are cut out of a solid metal block, but this type of variable pitch propeller is not. The propeller's larger and smaller pitches are adjusted by liquid pressure. There are special mechanisms inside: piston, cylinder, hydraulic oil, etc. . Hydraulic oil drives the piston to move, and the piston drives connecting rods and other mechanisms to change the pitch of the propeller.

This mechanism is located in the center of the propeller. It is hollow inside (should be called the propeller hub). During the test, it needs to be filled with hydraulic oil and then pressurized. It must maintain no oil leakage for at least 24 hours to be considered qualified. .

 But now, just eight hours later, the oil leaked.

Since it is not up to standard, it can be remade. However, the Swedes are obviously unwilling to do so.

Hearing Rosenberg's words, Qin Tao was amused: "Is oil leakage from variable pitch propellers normal? Excuse me, are you a professional? Do we need to double Lloyd's Register's standards? We don't need to talk about warship standards. Yes, let’s talk about civilian standards.”

 “Who are you?” Rosenberg asked.

"I? An ordinary person. I just run a shipyard and build ships for some foreign customers. I have read the information of Lloyd's Register a dozen times. Are you really sure that you are a professional? Back then? If I knew you were unprofessional, I shouldn’t have given you the order, and Siemens is still waiting.”

"Of course we are the most professional!" When mentioning this, Rosenberg immediately became proud: "Our Kameva Company was founded in 1860 and is a very old shipbuilding company. In 1937, we had already started to make adjustments. From the propeller, we are the leader in the industry!"

  We are an old factory and we are the elite in this industry! Rosenberg was very proud.

"Really? This is the most professional person who has such a problem?" Qin Tao looked at the other party: "And it's still this attitude? According to the rules, this kind of mistake should meet the standard of return, otherwise, we will Just go through the return process, let’s find Siemens, which is not professional, to make it.”

Jin Mao nodded: "You have repeatedly stalled for time. Now that we are here, serious quality problems have arisen and you still refuse to admit it. I think we have to return the goods. Even if we file a lawsuit, we will not fight with this kind of company." Deal!"

“No, please don’t!” After all, the contract has been signed, and if the product is returned due to quality problems, their company will also have to compensate for the loss.

Rosenberg rolled his eyes, and then said: "The standards stipulated by Lloyd's Register are for civilian ships. The standards for our warships are different from theirs. When we were tested just now, the pressure was a bit high, so these hydraulic oils are not The quality defects come out of the gaps in the metal atoms!"

  Come out of the gaps of metal atoms?

Qin Tao stared at Rosenberg: "Sure enough, you are really professional. If you want to press the hydraulic oil out of the gaps between metal atoms, you need at least 500 atmospheres of pressure. What is the pressure now? Not even 50 atmospheres. , there are only fifteen. In this case, can the hydraulic oil come out? Did God reach out and push it?"

 If an iron barrel for storing oil has been left for a long time, such as decades, you can feel that the surface of the oil barrel will be somewhat smooth, that is, oil has seeped out. However, if the oil barrel is well sealed, how can it come out?

The answer lies in the gaps between atoms inside the oil barrel. On the surface, the metal oil barrel is very dense and nothing can come out. However, if you use a vacuum tunneling microscope, you can see the huge gaps between the metal atoms. If a metal atom is compared to a ping-pong ball, then there are only three or five ping-pong **** on a playground, and the rest of the space is empty.

 So, the gaps inside are very large, and oil molecules can easily pass through, but this is at the atomic level.

Either it takes decades, or it requires increased pressure. Now this situation can only be attributed to the hand of God.

After Qin Tao finished speaking, he glanced at the other party with contempt: "Besides, whether it is a gap in the metal atoms or a manufacturing defect, it is very easy to identify, just an endoscope will do. Now, let the oil out Come on, let’s use an endoscope to observe!”

 After finishing speaking, Qin Tao glanced at Rosenberg again: "Such a professional factory like yours, shouldn't it not have an endoscope? If not, we will go out and buy one."

 Sweat came out in a swipe on Rosenberg's forehead. He already felt that he would not be able to get through today no matter what.

“We do have endoscopes, but we need to coordinate and go through the process. They won’t be delivered until tomorrow. Can you please come over for inspection tomorrow?”

tomorrow?

Qin Tao smiled: "You guys shouldn't be working all night to make up for the gaps inside, right?"

"Of course not. We are the leader in the propeller industry, how can we do this kind of thing? Tomorrow, you come over and use an endoscope to inspect, and you won't be able to inspect anything. By the way, tonight, we will have a dinner party , you are welcome to attend.”

"tonight?"

 “Yes, it’s tonight.”

“The ancestors said it right, eat with others’ mouths and use others’ hands softly. If we want to eat, we must wait until the products are qualified and then eat and drink after we receive them. For now, we don’t have to.”

PS: There are many versions of this propeller, some of which have been artistically processed and are exaggerated at first glance. There are a lot of materials written casually without even knowing the structure. A layman like the Hero of East China can tell that something is wrong. Therefore, those data are not very credible. At this point in time, the Hero of East China was placed in 1991. It only needs to be installed before 112 is launched.

Also, this chapter originally had 6,000 words. However, when I was writing about the Berlin Wall, I wrote a little more, which might have violated taboos, so I deleted it, and there were not enough 6,000 words.

　　

 (End of this chapter)