Chapter 1085 The Development of Nanyang Diesel Engine Factory
Back then, when the Mingzhou Group was just developing, Qin Tao planned to set up a diesel engine factory to provide supporting equipment so that the money would not flow to outsiders. However, this process was not easy.
The first to invest in the shares was the Old District Diesel Engine Factory. This diesel engine factory mainly introduced French technology. The 16PA6V-280STC diesel engine produced has become the main power source of the 054 frigate. It is not only used for its own use, but also exported in large quantities.
Later, the absolute controlling shareholder was Nanyang Diesel Engine Factory. This diesel engine factory was originally on the verge of bankruptcy, but finally it took over the Mingzhou Group. The Mingzhou Group did not provide financial support, but mainly provided the technical data of the TBD620 diesel engine, allowing them to Study technical information and then copy related diesel engines.
This set of information was originally given to Bincheng Diesel Engine Factory, because this incident made Bincheng Diesel Engine Factory very dissatisfied. However, the information was obtained by Mr. Qin, and they had no choice. The two sides competed with each other, and finally developed advanced diesel engine.
This diesel engine was Mannheim's most advanced technology in the 1990s. Unfortunately, the company was not doing well and has now been acquired by Deutz. However, Mannheim's diesel engine technology has taken root in the East.
This kind of diesel engine is also used on a variety of ships, especially the diesel engine version for submarines!
When the Germans wanted to use cut-off submarine diesel engines to compete with the Mingzhou Group for orders, the Mingzhou Group launched an advanced domestic submarine equipped with a TBD620 diesel engine. The power system was also independent, so there was no need to worry about being stuck by foreigners. , now, the German submarine diesel engines can no longer be sold.
At the same time, Nanyang Diesel Engine Factory continues to develop other diesel engines. High-speed diesel engines are suitable for limited applications. For most civilian ships, medium-speed diesel engines are more common. They not only develop medium-speed diesel engines, but also dual-purpose diesel engines. Fuel engine!
With the continuous development of environmental protection, natural gas engines have begun to become a trend. The gasoline engines used in taxis can be converted to burn natural gas, and the diesel engines used in heavy trucks can also be converted to burn natural gas. The natural gas engines launched by heavy truck manufacturers are actually modified diesel engines. Compared with the original diesel engines, the biggest difference is that a spark plug needs to be installed inside the cylinder head of the diesel engine. Diesel only needs compression ignition, while natural gas needs to be ignited. .
When does the spark plug fire? Then you need to install a series of sensors and then control them through the engine's ECU.
After modification, the power will decrease and the temperature of the cylinder head will increase, but it is within the tolerable limit. The key is to save money! When natural gas heavy trucks first appeared, the same route cost one-third less fuel than diesel vehicles. Later, the price of natural gas continued to rise, and it was almost the same as the cost of diesel vehicles. However, natural gas vehicles are environmentally friendly. Diesel vehicles are restricted everywhere, while natural gas vehicles are directly allowed.
Natural gas engines still have many uses. Environmental protection requirements exist not only on land but also in the ocean. The power requirements of ships are also getting higher and higher.
Zhang Yuzhan, the director of Nanyang Diesel Engine Factory, stood at the gate early in the morning, looking eagerly at the road outside.
Behind him were several other factory leaders, and they were all muttering in their hearts that Mr. Qin didn't say hello in advance, and only called when he was about to come to the factory. This was obviously because he wanted to attack him unexpectedly.
However, our factory has strict rules and regulations and complete procedures. We will never let Mr. Qin find fault. It was just after eight o'clock and everyone was able to arrive at work.
While he was talking, a high-end Hongqi car had appeared in the distance, and Mr. Qin was here!
Qin Tao was also excited. After he came back, there was nothing else to do. Wandering around various shipyards would soon become boring. Therefore, he had to find something interesting to do. This diesel engine factory has not had one for a long time. When I came here, I heard that people from South Korea were interested in the diesel engines produced here and wanted to place an order, so he decided to come and have a look.
As for saying hello in advance? The factory must have cleaned up quickly and was busy greeting him. He just wanted to come over and have a look. There was no need to make such a big fuss, so he didn't contact him in advance.
The car stopped at the door. Qin Tao got out of the car and looked at the person who greeted him.
"Lao Zhang, you have worked hard these years."
When I first met Zhang Yuzhan, he was already the director of the factory. He had a worried face and looked very old. Now, more than ten years have passed. Although Zhang Yuzhan's hair has turned white, his mental state is very good.
"Without hard work, I can make the factory develop and grow. I feel very proud personally. Of course, I have to thank Mr. Qin for his support. Without the data from that year, our factory must have closed down and gone bankrupt."
"Well, I didn't actually support that much back then. I just gave you technical information and wanted to see if you could understand the technical information thoroughly. This was a risky investment, but I am very satisfied with the results." Qin Tao said : "You have not only understood the technology, but also improved it. Come on, let's go in and have a look. Let me open my eyes."
Now, Qin Tao's main focus is on warships, and the main power is gas turbines. He really doesn't pay much attention to how far diesel engine technology has developed.
"Okay, please come in. This is the factory." Zhang Yuzhan took Qin Tao to the factory. After entering, he saw a huge irregular long object being hoisted.
"Crankshaft?" Qin Tao asked curiously.
"Yes, it's the crankshaft."
The diesel engine is a reciprocating machine. The piston moves back and forth in the cylinder, but the power needs to be rotated. How to solve this problem?
This is the contribution of the crankshaft. The crankshaft turns the reciprocating motion transmitted by the connecting rod into rotation. There are as many connecting rod shaft diameters as there are cylinders. These shaft diameters have different angles, forming such a weird structure.
"The total length of this set of crankshafts is 10.6 meters, the rotation diameter is 1.63 meters, and the weight is 120 tons." Zhang Yuzhan said: "This set of crankshafts is used in the advanced medium-speed dual-fuel diesel engines we developed for natural gas ships."
Just a set of crankshafts weighs so much! So how big should the entire dual-fuel engine be? How heavy?
Medium-speed diesel engines will occupy the civilian ship market, of course because they are fuel-efficient. To illustrate with simple data, the fuel consumption rate of the most advanced medium-speed diesel engines is 175 grams per kilowatt-hour, and the fuel consumption rate of high-speed diesel engines must reach 195 grams per kilowatt-hour. When it comes to gas turbines It has to be increased to 205 grams per kilowatt hour. As for steam turbines, this data reaches 350 grams per kilowatt hour.
Of course, the steam turbine burns residual oil and cannot be compared with the previous ones.
Marine diesel engines are very large. In order to reduce fuel consumption, it is most common to use medium-speed or low-speed diesel engines. Looking at this crankshaft, Qin Tao asked with great interest: "Did we process this crankshaft ourselves?"
This complex configuration also requires sufficient precision and is very difficult to process. Only the most technically capable factories can process it! Qin Tao knows that there is a famous Huarui Marine Crankshaft Co., Ltd. in Bincheng, which specializes in manufacturing crankshafts for various marine engines. I wonder if the crankshaft in front of me is produced in-house or outsourced?
"We produce it ourselves. We have jointly developed a professional CNC center for crankshaft processing with relevant domestic units, which has greatly improved the processing accuracy and reduced the processing cost." Zhang Yuzhan was very proud: "After all, this kind of engine has already It is our main engine, with orders for 20 to 30 units a year. Without CNC machining technology, we would not be able to process it at all. "
"We developed it ourselves?" Qin Tao was very surprised.
"Of course, we now have first-class CNC machine tool R&D capabilities in China." Zhang Yuzhan said: "Our production has entered the era of CNC processing. Whether it is crankshafts, high-pressure oil pumps, etc., they all need to be processed with CNC technology. "
Back then, domestic CNC technology was backward, and advanced CNC machine tools could only be imported from abroad. Not only were they expensive, but they also faced Batumi restrictions. Only backward machine tools could be imported, and advanced companies simply did not sell them.
But over the years, domestic technology has undergone earth-shaking changes. The country already has advanced CNC machine tool research and development technology, which is at the world's advanced level in many aspects. The introduction is of course the one obtained when Mingzhou Group was engaged in propeller processing. The continuous development of these technologies has promoted the progress of the entire CNC machine tool.
The machining of the crankshaft is quite complex. In the past, it could only be done on a bed. Not only was the operation process complicated, but it also placed high demands on technicians. The masters who can master these technologies are the technical backbone of diesel engine factories.
After entering the 1980s, the United States developed the turning process. Since then, modern crankshaft processing technology has emerged. In just a few years, it has transitioned from simple linear turning to inner ring tool rotating turning and outer ring tool rotating. Car pulling greatly improves the processing speed.
After entering the 1990s, crankshaft processing entered the CNC era, and various processing machines emerged in endlessly. CNC high-speed external milling technology made crankshaft processing easier.
Now, relevant technology is available in China, and it has developed into a big one. If you want to process such a crankshaft that is more than ten meters long, the length of the CNC machine tool must be more than fifteen meters!
Qin Tao nodded with satisfaction: "Yes, if our country wants to develop, it must become a major manufacturing country! In the past, we relied on cost advantages, but now we rely on technological advantages. Our engines can obtain orders from foreign shipyards. It’s something to be proud of!”
"Yes, in the 1980s, when the country opened up, we saw advanced foreign technology and also saw our own backwardness. When we first got the Mannheim diesel engine technology, we were surprised. The various requirements were far beyond ours. processing capabilities, and now, I believe that our technology will be beyond the reach of foreigners.”
The crankshaft is just a component of the engine. Moving forward, you can see the piston connecting rod assembly on the assembly line. The huge piston is half a meter in diameter!
"Currently, our medium-speed diesel engines have a bore of 510 mm, a stroke of 600 mm, and a rated speed of 500 rpm. There are four designs in total, from 12 cylinders to 18 cylinders, with a maximum power of 17,550 kilowatts." Zhang Yuzhan walked and gave Qin Tao introduce.
The speed of high-speed diesel engines generally exceeds one thousand revolutions per minute, the speed of medium-speed diesel engines is several hundred revolutions, and the speed of low-speed diesel engines is tens of revolutions. Among freighters, the installed capacity of medium-speed diesel engines is the highest.
"As for fuel, our current focus is on dual-fuel engines of diesel and natural gas. In fact, not only natural gas ships can use dual fuel, but even ordinary cargo ships can also use natural gas."
Ordinary cargo ships normally burn oil, but with the improvement of environmental protection requirements, some cargo ships have begun to install natural gas engines, and in this era, natural gas engines also have the advantage of economy, because the price of natural gas is still relatively low.
However, if ordinary cargo ships want to burn natural gas, they have to be modified and LNG fuel tanks have to be installed on the bottom of the ship.
If it is an oil-burning engine, the fuel tank can be installed according to the structure of the hull, and it can be installed as appropriate. However, LNG is different. This fuel tank must be a cylinder, which will waste a certain amount of warehouse volume. At the same time, since liquefied gas may leak, the quality requirements of various valves and pipes are very high, and alarms and other devices must be installed.
It is essentially similar to natural gas heavy trucks.
Qin Tao nodded: "Then we can also design some cargo ships that burn natural gas. Economy is one aspect, and environmental protection is another. We must contribute our own strength to the world's environmental protection cause."
Hearing Qin Tao talking about environmental protection, Zhang Yuzhan's face was a little embarrassed.
"What's wrong?"
"In fact, we also have a modification that burns heavy oil."
Can diesel engines burn heavy oil?
Of course it can! Whether it is diesel or heavy oil, it is just to spray the fuel into the cylinder and let the fuel burn. Diesel can burn, natural gas can burn, and heavy oil can of course burn!
The world's largest civilian marine engine is Wärtsilä's RT-flex96c. This engine is 27.3 meters long and 13.5 meters high, almost catching up with the size of the aircraft carrier's island, and its weight has reached 2,500 tons.
Such a behemoth, do civilian ships need it?
When it was first manufactured, no civilian ship liked to use it. Although its power is as high as 110,000 horsepower, it allows a 100,000-ton giant ship that could only run at a speed of more than ten knots to reach more than twenty knots, but ship owners don't care about time, what they care most about is money!
This engine has 14 cylinders, each cylinder is 2,000 liters, and consumes 15,000 liters of diesel per hour. No ship owner can afford it!
Seeing that the engine that set the Guinness World Record was built but no one used it, Wärtsilä was worried, and then they used their brains to change the fuel from diesel to heavy fuel oil. Shipowners are afraid of spending money? Then we will burn inferior fuel!
Hearing that this engine can burn heavy fuel oil, shipowners from all over the world immediately flocked to it. It has high horsepower and low cost, which is very cost-effective! Seeing that the 96C engine continued to receive orders, Wärtsilä counted money until its hands were soft and lived a happy life. Until later, the voice of environmental protection became louder and louder, and this engine could not be sold again.
Although heavy fuel oil is cheap, it has too high sulfur content and seriously pollutes the environment. Wärtsilä has also been criticized.
Now, how should we choose the route?
"We should not burn heavy oil." Qin Tao said: "Since we have already established our brand and promoted our green and environmentally friendly engines, we should not pollute the earth anymore. We should actively promote environmental protection to all countries. We can promote dual-fuel engines."
It's not that their engines can't be sold. They are very popular now. There is no need to be both right and wrong. Promoting dual-fuel engines can save users money and create an environmentally friendly image. Who let the Europeans buy this?
"Yes, then we will follow your plan and focus on developing our own dual-fuel engine technology."
"Please introduce this dual-fuel engine to me." Qin Tao is still quite curious about these technologies.
"Okay, compared with diesel engines, our dual-fuel engines mainly add spark plugs, throttle valves on air filters, and crankshaft angle sensors on flywheel housings..."
The two continued to talk while walking forward. On the production line in front, an engine had been assembled. After the intake and exhaust systems of this engine were installed in place, the entire length reached 13.6 meters and the width reached 4.7 meters. The V-shaped 18-cylinder structure looks very spectacular.
"The maximum power is 17 megawatts, which is not low, but the size is too large and not suitable for warships." Qin Tao sighed.
Gas turbines are only more than 20 megawatts, and the diesel engine in front of him can output 17 megawatts. The power is enough, but the size is too large.
For ships of hundreds of thousands of tons or even hundreds of thousands of tons, this volume is nothing, but for warships, every inch of land is valuable. Even for big guys like aircraft carriers, space cannot be wasted.
"Yes, diesel engines can also produce high enough power, but the size of diesel engines is huge and cannot be compared with gas turbines."
At this time, Xu Zhengyang came over: "Mr. Qin, the purchasing representative of the Linear Heavy Industry of South Kimchi Country will come in an hour. Do you want to meet him?"
South Kimchi Country is going to come to the East to purchase marine engines. Qin Tao knows it, but he doesn't know that the other party will also come today. Do you want to meet him?
Qin Tao thought briefly: "I'm free anyway, so I'll meet him."
I have to find some fun for myself, after all, I can't go out.
An hour later, Huang Youxian, the purchasing representative of Xiandai Heavy Industry, arrived at the Nanyang Diesel Engine Factory. When he got off the car, he was surprised to see the person standing at the door of the office building. His eyes almost fell out.
"Boss Qin? I didn't expect you to come to pick me up in person." Huang Youxian was flattered.
In the online heavy industry, Huang Youxian is also considered Zheng Yishan's confidant. He is usually high and mighty, but in front of President Qin, he is nothing. A small figure like him actually troubles President Qin to come and greet him in person?
"Yes, I heard that our friendly neighbors are coming, so I came to greet them in person. Welcome you." Qin Tao extended his hand enthusiastically.