Great warships

Chapter 930

Alexieva felt a chill. She has been in the East for many years. Of course, she also knows many habits of the East. The Mingzhou Group is an exception here. No matter what it is, the self-use is much better than the export.

This may be the difference between companies with a military background and other companies.

Alexieva said nothing, just watched silently.

"Then fiddle with it like this first. After selling it, you can also get some operating experience from customers, accumulate usage data during operation, and then make improvements."

Zhao Gang nodded: "We think so too. We can only do so much at the moment. However, what should be allocated will still be provided, especially kinetic energy recovery."

For fuel vehicles, when going downhill or braking, the most is to consume less fuel. The EFI engine can control the fuel injection through the ECU. When encountering a downhill section, it can control the fuel injection less, or even No injection, just use the engine as a reverse brake during the whole process. During this process, the fuel consumption will be very small.

However, this is only to reduce consumption, and the energy consumed during this process cannot be accumulated.

Only electric cars can do it.

For electric vehicles, the cruising range is a big indicator. If the battery can be reversely charged while the car is running, it will definitely be cool.

This operation is kinetic energy recovery. As long as the car slows down or goes downhill, the car can drive the motor to rotate. At this time, the motor becomes a generator, which not only provides a strong deceleration torque, but also generates electricity It is passed to the super capacitor on the car, and then through the buffer of the super capacitor, the current is stably charged to the battery.

If there is a long downhill of tens of kilometers, the battery is only half of the battery. After the downhill, the battery may be full.

This is also a stunt that only electric vehicles can do.

For heavy trucks, this kinetic energy recovery is also very important.

"At present, our heavy-duty truck has three different battery configurations, providing three kinds of power of 282kWh, 350kWh, and 423kWh, with a range of 160km, 200km, and 245km respectively. Even the version with the largest battery has a range of less than that of a fuel vehicle. Therefore, the kinetic energy recovery of this heavy truck is even more critical, which can significantly increase the cruising range."

The endurance of normal fuel trucks is at least five to six hundred kilometers. If you get a large fuel tank, it can even increase the endurance of more than one thousand kilometers. This gives fuel trucks greater flexibility. During long-distance transportation, which province’s fuel prices The lowest, just fill up the gas in which province.

Now, hearing these introductions, Qin Tao nodded frequently, and then he thought of something: "What kind of brakes do our electric trucks use?"

Electric vehicles not only need to change the power system, but also many other systems have to be replaced. For example, the air conditioning system has to be replaced with an electric air conditioner. Cooling is better. When heating, the heating plate is directly used to provide heat, and the consumption of electric energy Whoosh, this is not as good as a fuel car. After all, a fuel car uses the waste heat of the engine to heat up, and there is no need to consume extra energy at all.

At the same time, the brakes also have a big problem.

The brakes of ordinary vehicles use the vacuum generated when the engine takes in air to provide power, which can make it easier to step on the brakes. Heavy-duty trucks use air pressure brakes. The engine of the car directly carries an air pump, which continuously The air pipe of the brake system pumps air, so what about the brakes of the electric truck?Also get an extra electric air pump?

"Currently we are equipped with an additional electric air pump on the braking system, which monitors the air pressure of the entire braking system at all times. As long as the air pressure is insufficient, the air pump will be activated. Since we have kinetic energy recovery, during the braking process with small force, we completely rely on the We recover kinetic energy to decelerate, and the driver only needs to step on the brake pedal when the brakes need to be stopped." Zhao Gang continued: "The same goes for the steering gear. We directly purchased Bosch's electro-hydraulic steering system, directly It can be matched to the truck."

Not only the brakes need the engine, but also the steering.The steering system of cars has been developed to electronic power assist, which has a more relaxed working environment than hydraulic power assist. The steering torque is large at low speeds and small at high speeds.

The steering system of trucks generally uses hydraulic steering gear due to the large power required. Bosch first developed the electro-hydraulic power steering technology, which was not intended to replace hydraulic power steering at the beginning. In the event of a failure, the torque superposition of the electronic control unit is used to help the vehicle meet the requirements of emergency steering.

Now, this system has matured, and it can control the steering of the vehicle without hydraulic power assist, so it just happens to be directly transplanted.

"Of course, these are also temporary. In the future, when we are free, we will develop our own electronic control system. Whether it is braking or steering, it can be controlled by electronic systems."

Electromagnetic catapults can be made. As long as the above technology is transplanted, electromagnetic brakes can be made in minutes, but they can't take care of it yet.

Qin Tao nodded: "That's right, anyway, these trucks are also used by black uncles. The technology doesn't need to be too high, but they must be strong and can withstand violent driving."

After watching the electric truck, Qin Tao can still accept this kind of oil-to-electric electric truck, after all, this is just the beginning.

Qin Tao was still thinking, and wanted to say something, but when he saw Alexeyeva behind him, he suddenly thought of something: "We are talking about the electric jet system, let's go, go back and coordinate this system."

"President Qin, it's almost time, why don't we go eat something first?" Zhao Gang looked at his watch and said to Qin Tao.

Qin Tao nodded: "Okay, let's try the food in the canteen of your Golden Sun Company."

"Go to the cafeteria? Mr. Qin, our company still has entertainment expenses. Since you are here, let's go to the restaurant outside to have a meal together. The cafeteria is too shabby. When the horse worker comes back, I heard that I will take you to the cafeteria , I'm afraid I'll be unhappy."

"It's okay, I'm used to delicacies from mountains and seas, I just want to eat something ordinary."

So, Zhao Gang had no choice but to take the big guy to the canteen.

In winter, it gets dark early, and the lights outside are already on. Countless people in overalls flock to the cafeteria. Qin Tao walks among them, unobtrusive.

As he was approaching the canteen, Qin Tao was surprised to see that these people straightened their stomachs, bent their waists back, and their entire upper body was almost flat. They just walked forward like this, looking very strange.

"What is this for?" Qin Tao asked curiously.

"Whether you are designing or working on the production line, your waist is always bent forward. After a long time, it may be bad for the spine. Therefore, we specially arranged this operation. Before going to the cafeteria for dinner, everyone You need to pass under those horizontal bar-like railings, so you exercise your body.”

Because it was dark, Qin Tao didn't see clearly just now, and he only saw these poles on the road when he got closer. Anyone who wants to eat can only pass through. Although you can bend forward if you want to cheat, everyone Everyone looked at it. No one was ashamed to do it, so they all bent backwards, and sometimes they had to lean on their legs with their hands. The posture was very unique, but the effect looked good.

Qin Tao also became interested and decided to try it himself, so he bent his body back, looked at the sky with his head, kept his body as low as possible, and slowly walked towards the first railing, when suddenly his foot slipped, so, plop!
"Boss Qin, are you alright?" Zhao Gang was very worried. There were a few female workers who were climbing through the railing beside them, and they were still giggling.

"It's okay." Qin Tao said: "The biggest gain from coming here today is that I know that my body is not as good as these employees. When I go back in the future, I will strengthen my exercise."

After finishing speaking, Qin Tao looked at Zhao Ling behind him: "Xiao Ling, arrange an hour of physical exercise for me every day from now on."

"Yes." Zhao Ling nodded. She was also happy to see Qin Tao's request. Exercise is a good habit, and it's time to cultivate it.

"President Qin, I'll take you with me." Xu Zhengyang said, "Just exercise with me every day."

Qin Tao doesn't need to go to any gym, he has a ready-made coach by his side.

There are a lot of people in the cafeteria, and they are all queuing up to get meals in a regular manner, but the credit card mode is still not implemented for the meals here. Everyone gets their plates and goes to the front to get meals, and they all have exactly the same meals.

"The amount is the same, but if you are not full, you can go back to the meal." Zhao Gang introduced: "This can also avoid waste. At the same time, there are only a few recipes, and the chefs in the cafeteria can make it very easy."

Qin Tao nodded: "Your cafeteria needs to learn from your brother units, but the tricks on the way to the cafeteria are good and can be promoted. When the group meeting at the end of the year, report your tricks."

"Yes." Zhao Gang was also very happy.

One serving of potato stew, one serving of scrambled eggs with tomatoes, one serving of bean sprouts, and one serving of rice. Overall, the food is acceptable, but the variety is very monotonous.

Several people ordered a meal each, and then sat down to eat together.

"Mr. Qin, speaking of the ducted propeller, it is not our company's strong point. We are only familiar with motors. If we want to make it, we have to cooperate with our brothers. However, when we are doing pump spraying, Also know some of the benefits of ducted propellers.”

The pump jet is a ducted propeller. The outer surface of the propeller is wrapped with a cylinder, which forms a duct. Compared with the previous method, it can not only protect the propeller, but also increase the thrust of the propeller.

"At that time we also talked about the benefits of ducted propellers used in the air." Zhao Gang continued: "The increase of ducts changes the slip flow field of the propeller, reduces the tip loss of the propeller, and improves the propeller to a certain extent. The aerodynamic efficiency of propellers, generally speaking, in order to manufacture ducted propellers, the size of the propellers will be reduced as much as possible, the speed of the propellers will be increased, and several propellers can even be superimposed, and the rotational torque can be eliminated if they are reversed.”

There is a terrible problem in the era of propellers: if the propeller rotates too fast, the tip of the propeller will stall, especially when the speed is close to the speed of sound, the aerodynamic efficiency of the propeller will decrease rapidly.The ducted propeller is wrapped with a layer outside, which greatly improves the aerodynamic environment of the propeller tip and increases the aerodynamic efficiency of the propeller.

"At the same time, as long as the design is good, the suction flow of the propeller can generate flow around the lip of the duct, forming a low-pressure area, so that the duct will generate additional pulling force, which can reach more than twice the pulling force of the propeller at most, that is to say, With a ducted propeller, the pulling force can be doubled."

In the era of propeller aircraft, when talking about power, it always only refers to the horsepower of the engine, not the thrust of the propeller, because this is a very metaphysical thing. When the benefits of the ducted propeller were discovered, some aircraft designers designed the fuselage I bought a big fan and want to make the most of this design idea.

"At the same time, increasing the speed and reducing the windward area can also reduce drag."

"Well, on the whole, this is still very beneficial. If this is the case, let's give it a try." Qin Tao said, "Is this project led by your Golden Sun company, or should you find another company to take the lead?"

"Water pump factory, the lift fan they make is what you said, but the lift fan uses a drive shaft, just replace our motor, we can make whatever motor they need .”

Qin Tao's eyes brightened, that's right, why did he forget about the water pump factory?
The water pump factory is just what everyone calls it in private. It has not only produced water pumps for a long time, but also various propeller propulsion devices, even the lift fan of the vertical take-off and landing engine. The power system of the ground effect aircraft is very similar.

Therefore, if you go to them directly, you can ask them to help you figure it out.

The ground-effect aircraft has already solved the control problem in high sea conditions. As long as the engine is corroded by water vapor and salt at sea and the service life is improved, it will be completely mature.

Thinking of this, Qin Tao became excited: "After dinner, let's go to the water pump factory and call those who make lift fans over to study together."

"Mr. Qin, you've been busy all day. Do you want to take a break and go tomorrow?" Alexieva asked. Although Qin Tao inspected the electric heavy truck midway, it was still for her to help.She looked at Qin Tao who had been busy all day for her project, and it was time to get off work, and she was still busy, so she felt a little sorry.

"Today's work is over today, so we can't delay it." Qin Tao said, "I'm usually too busy with work and don't have time to take care of your projects. Since I'm involved this time, of course I have to make proper arrangements."

Alexieva's heart was full of emotion.

Huating Machinery Factory.

Although it was already off-duty time, lights were on in many offices, and the production line was also brightly lit, showing how busy the factory was.

"Mr. Qin, why are you here? You didn't even say hello in advance." After getting the news, Zhao Changshui ran over from the workshop with an excited look on his face.

"I just came here to take a look." Qin Tao said: "If you say hello in advance, those of you who are supposed to get off work will not dare to get off work, and you have to wait for me. Isn't that a waste of your time?"

"How could it be? The workers in our factory work in three shifts, and the technicians often work overtime."

"Is it required by the factory?"

"Three shifts are required by the factory, but overtime is voluntary for everyone. Before the work is completed, everyone wants to work overtime. But don't worry, Mr. Qin, we will give full overtime pay to everyone who works overtime. Moreover, at [-] o'clock in the evening, we will forcefully clear the area and let them go back to sleep."

"Voluntary to work overtime? Is there anyone who has nothing to do and comes here to get overtime pay?"

"Our basic salary is not low. If there is nothing to do, of course we have to go back to accompany our wife and children." Zhao Changshui introduced.

"What about the team working on the lift fan? Are they working overtime too?"

"That's right." Zhao Changshui said: "Although the lift fan has been installed on our aircraft and it can fly normally and stably, there are still many areas that need improvement, especially the lift fan clutch. Everyone has worked hard. , want to develop more advanced materials to make this lift fan have a longer life."

Qin Tao nodded: "Okay, take me to have a look."

The lift fan is also a key project of the machinery factory. The R&D team formed to develop this project is still working hard. When Qin Tao entered, he saw many people busy there.

"Wang Gong, Wang Gong! President Qin came to inspect." Zhao Changshui shouted.

Wang Jinbao, who was still busy, stood up from his work station: "President Qin is here?"

Seeing Wang Jinbao approaching, Qin Tao was stunned. This technician is not yet 40 years old, right?Now it's full of white hair!

"Wang Gong, you have worked hard."

Seeing Qin Tao looking at his hair, Wang Jinbao smiled: "Boss Qin, my ancestors have less gray hair, don't worry, if you stay up late or something, it's not gray hair, but hair loss. My gray hair, It’s better than being naked.”

Qin Tao looked over and found a few bald heads, who didn't look very old.

"Everyone has worked hard." Qin Tao said to Zhao Changshui: "Director Zhao, our technicians are not easy, so give them more year-end awards."

"Yes."

"Long live President Qin!" Everyone immediately became excited.

No matter what theory it is, real bonuses are the best. Spiritual encouragement is never as good as material encouragement. In this regard, Mingzhou Group has never treated everyone badly.

"Boss Qin, do you have any mission here?" Wang Jinbao asked.

"There is a project." Qin Tao glanced at Alexieva behind him: "Shall we go to the meeting room?"

There was a conference room in the R&D department. After everyone sat down, Alexeyeva said: "We hope to have an electric propulsion system to replace our turbofan 18 engine. This engine has a thrust of 13 tons and a maximum diameter of 1.52 meters, the electric motor project is solved by Golden Sun Company, and the ducted fan is hoped to be handed over to you to solve, I don’t know if you have any problems.”

"No problem." Wang Jinbao patted his chest immediately: "We have already done this kind of project planning. At present, our lift fan has a diameter of 1.27 meters and a thrust of 8 tons. If it is enlarged to 1.52 meters, it can reach a thrust of 13 tons. The goal, appearance and size can also be kept the same, which is convenient for you to replace.”

That's all right?Alexieva was very excited.Mountains and rivers are full of doubts and there is no way out, and there is another village with dark willows and flowers!

"Moreover, the difficulty of our lift fan is not the pair of fans, but the transmission system, including the transmission shaft and the clutch. The processing of our transmission shaft is finally no problem, but the clutch is always a weak point. We have been able to do it for [-] hours now. The service life is still not enough. If you want to increase it to [-] or even more hours, and you plan to use a motor to drive, there is no problem. As for the [-]-horsepower motor, it will be handed over to Golden Sun Motor Company. Made."

Golden Sun Electric Co., Ltd. promised to manufacture related motors and use the motors to drive, but Qin Tao frowned when he heard the figure of [-] horsepower.

This requirement seems to be a bit big.

Their best motor has a peak power density of 7 kilowatts per kilogram. If this is [-] horsepower, does that mean that this motor needs more than three tons?

This is impossible, eight motors that produce the effect of increasing the lift, so more than 20 tons?Sure enough, this thing cannot be considered as an electric car, which is almost as good as the drive motor used to drive a warship.

The weight of a turbofan eighteen is only more than two tons.

Wang Jinbao said very lightly, we don't care about the motor, we just enlarge the lift fan to meet your needs.

Qin Tao frowned: "What if a gas turbine is directly driven by a drive shaft?"

"The problem of the transmission shaft can be solved, but the problem of the clutch is not easy to solve. At present, it can only achieve a lifespan of [-] hours. Our Golden Sun company is very good. Maybe it can develop a high-performance motor for us?"

"Well, since they promised to solve the motor problem, let them do it." Qin Tao also decided to kick the ball. Golden Sun Company is the leader in motors, so such trivial matters should be left to them.

"Everyone has worked hard, thank you for your help." Alexieva said to everyone.

"It should be, this will also expand our orders for lift fans and make our factory more profitable." Zhao Changshui said: "When the meeting is held at the end of the year, we will not be compared with other brother units."

They have no technical problems, and the technical difficulties have returned to Golden Sun.

After coming out, the sky is already full of stars.

"President Qin, the problem with the motor is the big problem." Alexeyeva said, "So, we will not fully rely on this solution, and we will also urge the relevant units to improve the existing turbofan engine. Increased resistance to moisture and salt."

"Well, you can't hang yourself on this tree. The aircraft you developed is the only one in the world. Our group will definitely support it. The profit will come later, and the technical problems will be solved first."

Alexieva nodded, feeling moved in her heart.

(End of this chapter)