Chapter 446: Advanced warship power supply scheme and the idea of electric vehicles
In the 1980s, when the country opened up, the country also saw advanced Western technology and was very surprised. In terms of aviation technology, when they saw the French Mirage 2000 fighter jet landing, domestic technicians and test pilots were extremely curious.
.
The other party didn't use a parachute and just used the brakes to stop him!
When the plane lands, it reaches a speed of hundreds of kilometers per hour. If the domestic brakes are stepped on directly, the brakes will definitely smoke and be scrapped. The parachute must be used first to slow down the plane before it can be used.
brake.
The French actually braked directly?
When the brakes came to a stop, the domestic technician touched the brake disc with horror on his face, and found that the brake pads did not overheat!
Technology in all aspects lags far behind the world's advanced level. Seeing foreign technology is like Grandma Liu entering the Grand View Garden. Although they know they are lagging behind, the technicians are not discouraged. If there is a gap, then they can catch up!
The third-generation aircraft produced in China can no longer use the backward braking system of the past, and must develop more advanced braking devices!
More than ten years have passed. What level have domestically developed products reached?
Qin Tao was not very clear, but he knew that if he wanted to solve the problem of the clutch friction plate, he had to start with the aircraft brake disc.
In later generations, the old American F-35 project also required advanced lift fan clutches. The company responsible for providing friction materials was Goodrich. In order to develop this technology, their company specially established a high-temperature composite of Santa Fe springs.
The materials team, this team does not work in isolation. They also contacted the Troy Aircraft Wheel and Brake Group in Ohio and the Materials and Simulation Technology Center in Brecksville, Ohio to work together to develop high-performance clutch materials with longer life.
The Americans also use brake materials to research, so for them, there is nothing much to say. They also have to find help from departments that research aircraft brake materials.
Wang Jinbao's eyes widened: "Mr. Qin, let's cooperate with a department that studies braking systems? This is a good idea!"
The plan put forward by Mr. Qin is definitely forward-looking. As long as you follow what Mr. Qin said, it will be absolutely correct!
Wang Jinbao has made up his mind. After Mr. Qin leaves, he will find relevant departments to cooperate!
In fact, for them, if they want to produce this kind of lift fan, they have to travel all over the country to find cooperative units. The advantage of their machinery factory lies in processing accuracy, but they are not a unit that researches materials, so they must
Just find cooperation with relevant departments.
"By the way, Mr. Qin, in order to bypass these complex technologies, someone in our project team has come up with a new plan."
New plan?
Qin Tao was very curious: "What plan?"
To achieve vertical take-off and landing, there are only two options in the world, either the Sea Harrier or the Yak-38. Only these two are mature, and our own lift fans are nothing more than deformations of the Yak-38.
"We can use the helicopter's turboshaft engine to drive this lift fan. In this way, the length of the drive shaft can be greatly shortened and the clutch can be eliminated!"
Driven by a turboshaft engine?
Qin Tao looked at Wang Jinbao in surprise: "Have you calculated it?"
Wang Jinbao nodded: "After calculation, the largest helicopter engine in the world is the D-136 equipped with the Mi-26. This engine can burst out more than 10,000 horsepower. We use two to drive the lift fans, so that it can still
There is a backup, so if one of the engines stalls, the other one can still provide a certain amount of power."
First come first served, Mingzhou Group is equipped with Mi-26, so they can get all the above parameters. They have made various calculations based on these parameters, and finally feel that there is no problem.
Qin Tao shook his head: "I'm not talking about power, but volume! Where do you plan to put these two engines? How to solve the problem of air intake and exhaust?"
Wang Jinbao was stunned.
Of course he did not consider these issues. In his eyes, such issues were certainly considered by aircraft designers.
"This kind of design is like farting and taking off your pants. It is not as good as the Yak-38 that directly uses a lift engine. It is also a turbine engine. Direct injection is enough, and it has to be transmitted through the transmission shaft." Qin Tao and everyone also said
They are all familiar with it, and it is not polite to say it: "Moreover, adding two more engines will increase the procurement cost and increase the complexity of the system."
Originally, Wang Jinbao thought this was a genius idea, but he didn't know that there were so many problems. Moreover, when Mr. Qin said this, he was able to realize that it was indeed a big trouble.
For an airplane, every gram of weight has to be calculated. Originally, the lift fan is already a dead weight in normal flight. As a result, two more engines are carried specifically for the lift fan. This is really ridiculous.
Pants.
"We have no other choice. This path is the most correct. We must continue along this path, so come on! Even if we can only produce a clutch with a lifespan of three to five times, it is still progress. In the future we will
It can be continuously improved until it finally matures.”
The design of the lift fan is the most mature, because this method has the simplest structure. Any changes will make it more complicated and will not be of any benefit to the aircraft.
Wang Jinbao nodded: "Mr. Qin, we understand, and we will definitely do our best to overcome the technical difficulties and finally reach the other side of success!"
"Well, you don't need to be particularly anxious. We are mentally prepared for the technical difficulty. Our research and development will take at least ten years, so everyone should take your time."
This chapter is not finished yet, please click on the next page to continue reading the exciting content! "Wouldn't that delay our aircraft test flight?" Wang Jinbao was a little worried.
"Don't forget, our aircraft has three models. If the lift fan is not mature, you can still fly the ordinary model first."
Everyone breathed a sigh of relief.
Qin Tao had just pointed out the research direction to the technical staff of the machinery factory and encouraged them to continue their efforts. Xu Zhengyang's big brother rang. When he finished answering the phone, he looked at Qin Tao who stood up and was about to have lunch with everyone: "Mr. Qin,
There is a dispute over at the Second Design Department, would you like to go over and have a look."
dispute?
Qin Tao knew that among technical staff, all kinds of arguments were normal. After all, the truth had to be refuted. However, the improvement policy for the aircraft carrier had been formulated. It was supposed that there would be no such arguments that required him to ask for help!
"Who's arguing with whom?"
"Horse workers, and everyone."
Qin Tao immediately understood that what could set Ma Gong against others was none other than medium-voltage DC technology.
"Let's go and take a look." Qin Tao said: "These truths are all refuted. We can hear the wonderful debate without talking."
The second design office is also in Huating, so Qin Tao can quickly reach the conference room. After entering, sure enough, the scene is exciting and intense. Ma Gong is using his own strength to fight with the scholars!
"Currently, all the ship power supply systems we use are AC. When the Varyag was designed, it was also 50 Hz AC, which is very mature. We cannot use immature DC technology at this time!"
The person who said this was an old technician who was responsible for designing the power system. Therefore, he was very familiar with this system. He would never agree to install any medium voltage DC.
This is completely random playing the piano!
"Yes, your design is mature enough. Nine alternators are not needed at all times. Normally, only four engines work. When more power is needed, the diesel generators are started to connect to the grid.
How do soldiers operate?"
How to operate? For engineers, this is definitely a nightmare! The grid connection of the alternator is very demanding. If the difference is 0.01 seconds, the entire system will burn down.
In particular, the Kuznetsov and Varyag use nine generators in order to increase power supply. Connecting so many generators to the grid is even more of a nightmare within a nightmare!
"However, if medium-voltage DC is used to transmit power, the generator will still use AC power, and the user will also need AC power. Conversion in the middle is too complicated!"
In short, they are resisting because no one has ever used this technology.
"Complicated?" The horseman looked up and said, "Do you know what kind of electricity our current lights use?"
Everyone shook their heads.
Everyone uses electricity every day, but they don’t know where this electricity comes from.
There seems to be no doubt about this, it must have come from the power plant!
“In October 1985, the plus or minus 500 kV Gezhouba to Huating DC transmission project started. The unipolar and bipolar lines were put into operation in 1989 and 1990 respectively. The DC line is 1,045.6 kilometers long and the unipolar transmission capacity is 600,000 kilowatts.
Bipolar 1.2 million kilowatts. Now, we have 11 power plants in Huating, with a total power generation equipment capacity of 4.6867 million kilowatts. The commissioning of this DC project is equivalent to providing us with 25% of the power supply, that is to say
, now at least one of the four lights above our heads is powered by DC power."
The West does not have ultra-high voltage DC transmission technology because they simply do not need it.
Domestic energy is mainly distributed in the west. For example, various hydropower stations are built in the west. The highly economically developed areas are in the east. In this way, power needs to be transported from the west to the east.
There is no need for this in Europe. It is almost equivalent to spanning the entire Western Europe. The area of their country is less than the size of a province in China.
Ultra-high voltage DC transmission has various advantages, so it has been intensively researched and thoroughly overcome in China, allowing domestic transmission technology to reach the highest level in the world.
"What's the significance of this?" asked another old man.
"I would like to say that for our country, the various conversion equipment required by DC transmission technology are already mature!"
The generator is AC, what the user needs is AC, and the power transmission process is DC. This process will inevitably involve the conversion problem between DC and AC.
It is easy to convert AC to DC, and a few diodes can solve the problem. However, converting DC to AC is not easy. It requires special and complex circuits. The conversion device in the ultra-high voltage transmission system has huge power requirements!
Why does the United States always choose medium-voltage AC technology? One of the big reasons is that it is not as easy for them to obtain a large number of conversion components as China. When the country is studying ultra-high-voltage DC transmission technology, it has already fiddled with these equipments.
Got it!
This thing cannot be imported from the West because the West does not have it.
Ultra-high voltages of hundreds of kilovolts can be used, and medium voltages of several hundred volts are no problem, and can even be simplified! After all, the insulation level has been reduced by several levels.
"No, even if we have these devices, it will greatly increase the complexity of our system!" Another person said.
"Everyone, if we use the generator you mentioned, we will need a complex set of reduction gears to reduce the speed of the turbine from several thousand rpm to 300 rpm, and it must be stabilized. Only in this way can the frequency of the alternating current be stable. Is it true?
Isn’t this system complicated? If our method is used, these mechanisms can be omitted. The generator can directly rotate at the same speed as the steam turbine, and the auxiliary diesel generator can be connected to the grid, which is a matter of starting it up.
, which is more complex?”
The horseman is not in a hurry, he is very confident in his system.
This chapter is not finished yet, please click on the next page to continue reading the exciting content! "I think you should be able to identify which solution is more reliable and simpler." Ma Gong continued: "Furthermore, we have two types of power generation.
You can choose a generator. One generator is an AC and DC generator, which can be switched at any time. AC and DC come out directly through the generator. The other is a twelve-phase generator. Driven by the same engine, it can generate several times the amount of electricity.
Come on, only it can provide a powerful enough power supply for our warships!" (Personally, these should be two kinds of generators. There is no way there is a twelve-phase generator that can switch between AC and DC at any time.)
The twelve-phase generator is divided into four three-phase electricity, and its frequency is constantly changing. If you want to use it on an aircraft carrier, it must be rectified into direct current so that it can be connected to the grid.
The nuclear power plant built by Mingzhou Group also uses twelve-phase generators, but three of them are directly used by shipyards and steel plants. Don't worry about it. Only one group supplies power to the public, so the issue of grid connection needs to be considered.
Of course, nuclear power plants on land will not change after they are started and will continue to operate stably. This is not a particularly big problem. Of course, if they are all switched to output, the load may be more balanced.
With the same power, the output power is greatly increased. This is the unique advantage of the twelve-phase generator!
Everyone gulped when they heard what the horseman said. They couldn't refuse this temptation!
"Moreover, we have also developed a large number of dc-dc (direct current-to-direct current) conversion devices, which can directly convert medium-voltage DC into low-voltage DC. Various electronic equipment on our warships can directly use this power module.
No more switching back to communication.”
After hearing Ma Gong's words, Qin Tao couldn't help but said: "Ma Gong, that is to say, we have developed mature DC-DC and DC-AC conversion devices?"
"Mr. Qin, when did you come?" Ma Gong was very curious and didn't know when Qin Tao came in. However, after saying this, he nodded quickly: "Yes, we have developed a military-level
The conversion device is fully suitable for use on mobile devices. Mr. Qin, do you have any ideas?"
Qin Tao nodded: "Well, I have an idea. We will discuss it in detail after this meeting is over."
Ma Gong was a little curious as to what new ideas Qin Tao had come up with. However, he would still pay attention to this controversy for now.
The truth has been explained clearly, can these people agree?
It still depends on who makes the final decision.
Babbage is the chief designer of this modification, and he has the power to make the final decision.
"Let's summarize it now." Babic said: "At present, the advantage of medium voltage DC is that it does not require complicated grid-connected operations, the power of the generator is large, and there is no need for a reduction gearbox. The disadvantage is that this is our first
Once used, we don’t know whether it will be mature. If it is immature and causes the warship to frequently lose its lock during use, it will be in trouble.”
"I can issue a military order!" Ma Gong said firmly: "We have already matured these technologies!"
"Then let's vote by a show of hands," Babbage said.
Qin Tao was a little helpless. In this field, not the choice of the majority is correct. After all, the truth is often in the hands of a few people. However, when there is a dispute, a show of hands is still a commonly used method. After all,
This approach is consistent with the golden mean.
"Hands up for using medium-voltage DC transmission," Babbage said.
The horseman raised his hand.
What about the rest?
Others were obviously waiting and watching, and finally, people in twos and threes began to raise their hands.
"There are a total of sixteen of us here, and more than half can pass." Babbage said and started counting: "One, two, three...six, seven."
Only seven people raised their hands!
Babbage shook his head, intending to reject this plan.
"Does it count if I raise my hand?" Qin Tao said, raising his hand.
"Of course, Mr. Qin, you have a deep understanding of technology." Babic nodded: "Eight people agreed, but the total number is seventeen, so it still does not reach half. It is a pity..."
The horseman's eyes also showed disappointment. At this moment, he was surprised to see an old man raise his hand.
Didn’t this guy object just now?
"I believe Mr. Qin. Since he thinks this plan is feasible, I also support it." The old man said.
Now, it’s more than half!
The horseman was overjoyed.
More than half means that his plan can be passed!
This system is the first in the world, and it was used on an aircraft carrier!
Of course, only the aircraft carrier needs it most because it has so many generators!
Frigates, destroyers, and other warships do not require a lot of electricity, so one main engine is directly driven, and at most one backup diesel generator is enough. It is definitely not like an aircraft carrier, where Lao Maozi actually uses nine generators.
Even though we have simplified the machine, we still use four generators, which is quite a large number.
Therefore, an advanced power supply system is necessary, and choosing this medium-voltage DC transmission technology is an inevitable choice!
In the joy of the horseman, Babbage actually raised his hand!
"I also agree to use this system. In terms of power supply for warships, you have finally grown up and are more advanced than ours. I hope to see the world's leading power supply system for warships!" Babbage said.
Although more than half is considered passed, the significance of Babbage raising his hand is extraordinary, indicating that as the chief engineer, he has recognized this plan from the bottom of his heart.
The horseman had a smile on his face.
"Mr. Ma, I also agree with your plan!" Another old man raised his hand.
In the end, everyone present actually raised their hands!
The horseman was very excited.
"Thank you for your support! We have been studying this power supply system for many years, and there will definitely be no problems. We must submit a satisfactory answer to the military and the motherland! We will provide a specific design plan in the next month.
In time, it will be completely perfected!”
"Okay, now that the plan has been passed, is our meeting over? Do you want to go to dinner?" Qin Tao asked.
His stomach is really hungry.
"That's right, let's go eat first."
The food in the restaurant had already gone cold. When everyone passed by, the staff in the restaurant reheated the food and then brought it out again.
While eating, the horse worker asked Qin Tao: "Mr. Qin, you just said you had a new idea, what was it?"
"I'm thinking, our technologies are already mature, can we apply them to cars?"
"On the car?" The horseman was a little surprised: "How to use it?"
"Install batteries into the car, drive the electric motor, and drive the body forward, so as to create a specialized electric car."
Ma Gong shook his head: "That's impossible. The energy density of the battery is too low. The car can only drive more than a hundred kilometers at most. When cars first appeared, they were driven by batteries, but they were later replaced by internal combustion engines.
"
"But it's environmentally friendly." Qin Tao said: "You probably don't know that in the United States, General Motors is developing an electric car called Impact. This is a trend in the future."
When talking about electric cars, everyone will think of the famous Tesla. It seems that this car created an era. In fact, before it, General Motors was the first to develop electric cars. Even many of Tesla's technologies
They are all transplanted from Impact Auto.
In the 1990s, impact cars were at their peak. They were high-end and expensive. They were only rented but not sold. The resumes of renters were strictly scrutinized, making them a toy for the rich.
And in the end, after changes in policies and regulations, General Motors mercilessly abandoned the cars and destroyed them all cruelly, leaving countless electric car enthusiasts in tears.
Now, hearing Qin Tao talk about this, Ma Gong frowned: "What is the future trend?"
"Yes, since we have this technology, we may be able to develop electric vehicles. This project will definitely raise a lot of money. We can use this money to develop our other businesses."
A lot of money was raised! What Qin Tao said is very important. This project is used to make money! The money raised can be used to do many things.
"Mr. Qin, I'll listen to you on how to do it."
Qin Tao nodded, and just when he was about to continue speaking, Xu Zhengyang walked to Qin Tao's side.
"Mr. Qin, Ms. Vitalia called and invited you to go to the capital as soon as possible."