Great warships

Chapter 446 Advanced Warship Power Supply Scheme and Concept of Electric Vehicles
In the 80s, the door to the country was opened, and the country also saw advanced Western technology, which was very surprising.In terms of aviation technology, when seeing the landing of the French Mirage 2000 fighter, the domestic technicians and test pilots were extremely curious.

The other party didn't use the parachute, and just used the brakes to stop it!
When the plane lands, it has a speed of hundreds of kilometers per hour. If the domestic brakes are stepped on directly, the brakes will smoke and be scrapped. You must first use the speed parachute to slow down the speed of the plane before you can use it. brake.

The French actually brake directly?

When the brakes were stopped, the domestic technicians touched the brake discs with horror on their faces, only to find that the brake pads were not overheated!

The technology in all aspects is far behind the world's advanced level. Seeing foreign technology is like grandma Liu entering the Grand View Garden. Although I know that I am behind, the technicians are not discouraged. If there is a gap, then catch up!

The third-generation aircraft produced in China can no longer use the backward braking system in the past, and must develop a more advanced braking device!
More than ten years have passed, what level has the domestically developed products reached?

Qin Tao didn't know it very well, but he knew that if he wanted to solve the problem of the friction plate of the clutch, he had to start with the brake disc of the aircraft.

In later generations, the Yankees' F-35 project also required advanced lift fan clutches. The Goodrich Company was responsible for providing friction materials. In order to research this technology, their company specially established a high-temperature composite in Santa Fe Springs. The materials group, this group is not working behind closed doors, they also contacted the Troy Aircraft Wheel and Brake Group in Ohio and the Brecksville Materials and Simulation Technology Center in Ohio to work together to develop high-performance clutch materials with longer life.

The Americans also use brake materials for research. For their own side, there is nothing to say, and they also have to ask the department that researches aircraft brake materials for help.

Wang Jinbao's eyes widened: "Boss Qin, let's find cooperation with the department that studies the braking system? This is a good idea!"

The plan proposed by Mr. Qin must be forward-looking, as long as you follow what Mr. Qin said, you will be absolutely right!
Wang Jinbao has already made up his mind, and after Mr. Qin leaves, he will find cooperation with relevant departments!
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 the processing accuracy, but they are not the unit that studies materials, so they must Find the relevant departments to cooperate.

"By the way, Mr. Qin, in order to bypass these complicated technologies, someone in our project team has proposed 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 have matured, and the lift fan of our own side is only equivalent to the deformation of the Yak-38.

"We can use the turboshaft engine of the helicopter to drive this lift fan, so that the length of the transmission shaft can be greatly shortened, and the clutch can also be cancelled!"

Driven by a turboshaft engine?
Qin Tao looked at Wang Jinbao in surprise: "Have you calculated it?"

Wang Jinbao nodded: "I have calculated that the largest helicopter engine in the world is the D-26 equipped with the Mi-136. This engine can burst out more than 1 horsepower. We use two to drive the lift fan. There's a backup, so in case one of the engines dies, the other will still provide some power."

The Mingzhou Group is equipped with Mi-26, so they can get all the above parameters, and 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 are you going to put these two engines? How to solve the problem of air intake and exhaust?"

Wang Jinbao was taken aback.

Of course he didn't consider these issues. In his eyes, such issues are of course 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 the lift engine. It is also a turbine engine. Direct jet is enough, and it has to be transmitted through the drive shaft." Qin Tao and everyone also I am familiar with it, so I am not polite to say it: "Besides, adding two more engines will increase the procurement cost and increase the complexity of the system."

Originally, Wang Jinbao thought it was a genius idea, but how could he know that there are still so many problems, moreover, he was able to realize it when Mr. Qin said this, it was indeed a big trouble.

For an aircraft, every gram of weight has to be considered. Originally, the lift fan is already a dead weight in normal flight. As a result, two more engines specially used for the lift fan are carried on the back. This is really farting. Pants.

"We have no other choice. This path is the most correct. We must go down this path. So, come on! Even if we can only produce a clutch with a lifespan of three to five times, that is still an improvement. In the future, we will It can be continuously improved until it finally matures."

The design scheme of the lift fan is the most mature, because this method has the simplest structure, and any modification will make it more complicated, which will not do any benefit to the aircraft.

Wang Jinbao nodded: "Boss Qin, we know, we will definitely overcome technical difficulties with all our strength, and finally reach the other side of success!"

"Well, you don't have to worry too much. We are mentally prepared for the technical difficulty. Our research and development can take at least ten years. Take your time."

"Won't that delay our plane test flight?" Wang Jinbao was a little worried.

"Don't forget, our aircraft is one aircraft with three types. If the lift fan is immature, you can still fly the ordinary model first."

Everyone breathed a sigh of relief.

Just as Qin Tao pointed out the research direction to the technicians of the machinery factory and encouraged them to continue working hard, Xu Zhengyang's mobile phone rang. When he finished answering the phone, he looked at Qin Tao who got up to have lunch with everyone: "President Qin, There was a dispute at the second design department, do you want to go and have a look?"

dispute?

Qin Tao knows that among the technicians, all kinds of arguments are normal. After all, the truth is refuted. However, the improvement policy of the aircraft carrier has been formulated, and it is said that there will be no such arguments that need to ask for help!
"Who's arguing with whom?"

"The horseman, and all."

Qin Tao immediately understood that it must be the medium-voltage direct current technology that can make Ma Gong and other people confront each other.

"Come on, let's take a look." Qin Tao said: "This truth is all refuted. We can hear wonderful debates without talking."

The second design office is also in Huating, so Qin Tao can quickly reach the meeting room. After entering, sure enough, the scene is exciting and intense. Ma Gong is relying on his own strength to fight against the scholars!
"Currently, all the ship power systems we use are AC. When the Varyag was designed, it was also 50 Hz AC. It is already very mature. We can't use the immature DC technology at this time!"

The person who said this was an old technician who was in charge of designing the power system at the beginning, so he was very familiar with this system, and he would never agree to use medium-voltage DC.

This is totally messing around!

"That's right, your design is mature enough. Nine alternators are not needed all the time. Normally, only four engines work. When more power is needed, when the diesel generator is started to connect to the grid, the turbine How do soldiers operate?"

How to operate?For engineers, this is definitely a nightmare!The grid connection of the alternator is very demanding, and the difference of 0.01 seconds will cause the entire system to burn down.

In particular, the Kuznetsov and the Varyag still use nine generators in order to increase the power supply. If so many generators are connected to the grid, it will be a nightmare within a nightmare!

"However, if medium-voltage direct current is used for power transmission, the generator still needs alternating current, and the user also needs alternating current. It is too complicated to convert halfway!"

In short, they are resisting, because this technology has never been used.

"Complicated?" Ma Gong looked up at the top of his head: "Do you know what kind of electricity our current electric lights use?"

The crowd shook their heads.

The big guys use electricity every day, but they don't know how the electricity comes from.

There seems to be no doubt about it, it must have come from the power plant!

"In October 1985, the Gezhouba-Huating DC power transmission project with a plus or minus 10 kV was started. The unipolar and bipolar were put into operation in 500 and 1989 respectively. Bipolar 1990 million kilowatts. Now, we have 1045.6 power plants in Huating, with a total capacity of 60 million kilowatts. The operation of this DC project is equivalent to providing us with 120% of the power supply. That is to say, now we Of the four overhead lights, at least one is powered by direct current."

The West does not have EHVDC 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, and areas with highly developed economies are in the east. In this way, electricity needs to be transmitted 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 domestic province.

EHVDC transmission has various advantages, so it has been thoroughly researched and thoroughly conquered by the country, making domestic power transmission technology reach the highest level in the world.

"What's the point of this?" Another old man asked.

"I want to say that for our country, the various conversion equipment required for DC transmission technology are already mature!"

The generator is AC, what the user needs is AC, and the power transmission process is DC. In this process, the conversion between DC and AC will inevitably be involved.

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 complicated circuits, and the conversion device in the ultra-high voltage transmission system has huge power requirements!
Why do Yankees choose medium voltage AC technology?One of the big reasons is that they are not as easy to obtain a large number of conversion components as in China. When China is researching ultra-high voltage direct current transmission technology, it has already fiddled with these devices!

This thing can't be imported from the West yet, because the West doesn't have it either.

Ultra-high voltage of hundreds of kilovolts can be used, and medium voltage of several hundred volts is no problem, and it can even be simplified!After all, the insulation level has been lowered by several grades.

"No, even with these devices, it will greatly increase the complexity of our system!" Another person said.

"Everyone, if you use the generator you mentioned, you need a set of complex reduction gears to reduce the speed of the steam turbine from several thousand revolutions to [-] revolutions, and it must be stabilized so that the frequency of the alternating current is stable. Isn't this system complicated? If we use our method, then these mechanisms can be omitted, the generator can directly rotate at the same speed as the steam turbine, and the auxiliary diesel generator is connected to the grid, that is, it is a matter of starting , which is more complex?"

Ma Gong is not in a hurry, he is very confident in his system.

"I think you should be able to identify which solution is more reliable and simpler." Ma Gong continued: "Moreover, we have two generators to choose from. One generator is an AC and DC generator, which can be used at any time. Switching, the AC and DC come out directly through the generator, the other is a [-]-phase generator, driven by the same engine, it can generate several times the power, only it can provide enough powerful power supply for our warships!" (Personally, this should be two kinds of generators. It is impossible to have 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 it wants to be used 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 the Mingzhou Group also uses [-]-phase generators, but three of them are directly used by shipyards and steel mills. Don’t worry about it. Only one set supplies power to the public, so the issue of grid connection needs to be considered.

Of course, the nuclear power plants on land will not change after they are started, and will continue to run stably, so it is not a particularly big problem. Of course, if all of them are switched to output, maybe the load will be more balanced.

The same power, but the output power is greatly increased. This is the unique advantage of the twelve-phase generator!
Hearing what Ma Gong said, everyone swallowed a mouthful of spit, they couldn't refuse this temptation!
"Moreover, we have also developed a large number of DC-DC (direct current-direct current) conversion devices, which can directly convert medium-voltage direct current into low-voltage direct current. Various electronic equipment on our warships can directly use this power module. No need to switch back to communication anymore.”

Hearing Ma Gong's words, Qin Tao couldn't help it: "Ma Gong, that is to say, we have developed a mature DC-DC and DC-AC conversion device?"

"President Qin, when did you come?" Ma Gong was very curious, not knowing when Qin Tao came in.However, after saying this, he nodded quickly: "That's right, we have developed a military-grade conversion device, which is fully suitable for use on mobile devices. President Qin, do you have any ideas?"

Qin Tao nodded: "Well, I have an idea. Let's discuss it in detail after this meeting is over."

Ma Gong was a little curious, wondering if Qin Tao had any new ideas, but let's pay attention to this debate now.

The truth has been made clear, 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 decision.

"Let's sum it up now." Babich said: "At present, the advantage of medium-voltage DC is that it does not need 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, I don’t know if it is mature, if it is not mature, causing the warship to trip frequently during use, it will be troublesome.”

"I can issue a military order!" Ma Gong said firmly: "We have already matured these technologies!"

"Then, let's vote with a show of hands." Babbage said.

Qin Tao is a little helpless. In this field, the choice of the majority is not the right one. After all, the truth is often in the hands of the few. However, when encountering disputes, a show of hands is still a common method. After all This approach is in line with the golden mean.

"Hands up for MVDC," Babich said.

The horseman raised his hand.

What about the rest?

Others were obviously watching, and finally, people in twos and threes also began to raise their hands.

"There are a total of 16 of us present, and more than half of them can pass." Babbage said, counting: "One, two, three... six, seven."

Only seven people raised their hands!
Babbage shook his head, intending to deny this plan.

"Do I count by raising my hand?" Qin Tao said, raising his hand.

"Of course, Mr. Qin, you have deep insights in technology." Babiqi nodded: "Eight people agreed, but the total number is 17, so it still didn't reach half of the people. It's a pity..."

Ma Gong also showed disappointment in his eyes, but at this moment, he was surprised to see an old man raised his hand.

Didn't this guy object just now?

"I believe in President Qin. Since he thinks this plan is feasible, then I also support it." The old man said.

Now, it's more than half!

Ma Gong was overjoyed.

More than half, it means that his plan can be passed!
This system is the first in the world, and it was used on the aircraft carrier!

Of course, only the aircraft carrier needs it the most, because it has so many generators!
Frigates, destroyers, these warships don’t need a lot of power, so it is enough to drive one directly from the main engine, and at most one spare diesel generator is enough. It is definitely not like an aircraft carrier. The old man actually used nine generators Even if it is simplified, our side uses four generators, which is quite a large number.

Therefore, it is necessary to have an advanced power supply system. It is an inevitable choice to choose this medium-voltage DC transmission technology!

In the joy of the horseman, Babbage actually raised his hand when he saw it!

"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!" Babich said.

Although more than half of the proposals passed, Babbage raised his hand with an unusual meaning, indicating that as the chief teacher, he had already approved this plan from the bottom of his heart.

The horseman had a smile on his face.

"Ma Gong, 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 never be any problems. We must submit a satisfactory answer to the army and the motherland! The specific design plan will be released in the next month. In time, it will be completely perfect!"

"Okay, now that the plan has been approved, is our meeting over? Do you want to have dinner?" Qin Tao asked.

His stomach is really hungry.

"That's right, let's go eat first."

The food in the restaurant had been cold for a long time, and when everyone passed by, the staff in the restaurant reheated the food, and then brought it up again.

While eating, Ma Gong asked Qin Tao: "Boss Qin, you just said you have a new idea, what is it?"

"I was thinking, our technologies are already mature, can we apply it to cars?"

"On the car?" The horseman was a little surprised: "How do you use it?"

"Install the battery on the car, drive the motor, and drive the body forward, so as to make a special 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 100 kilometers at most. When the car first appeared, it was powered by batteries, but it was replaced by an internal combustion engine later."

"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."

Speaking of electric vehicles, everyone will think of the famous Tesla. It seems that this car has created an era. In fact, before it, General Motors was the first to engage in electric vehicles. Even, many of Tesla’s technologies, They are all transplanted from the impact car.

In the 90s, impact cars were in full swing, taking the high-end route, expensive, only rented and not sold, and the resumes of the leasers were strictly checked, making it a toy for the rich.

In the end, after the changes in policies and regulations, General Motors ruthlessly abandoned this car and destroyed it all cruelly, which made countless electric car enthusiasts cry.

Now, hearing Qin Tao mention this, Ma Gong frowned: "The future trend?"

"Yes, since we have this technology, we may be able to create an electric car. This project will definitely raise a lot of money. We can use this money to develop our other businesses."

Raised a lot of money!Qin Tao's words are very important, this project is used to collect money!The money collected can be used to do many things.

"Boss Qin, I'll follow your instructions on how to do it."

Qin Tao nodded. Just as he was about to continue, Xu Zhengyang walked to Qin Tao's side.

"President Qin, Ms. Vitalia has called and invited you to go to the capital as soon as possible."

(End of this chapter)