One Thousand Four Hundred and Ninety-Two, No Shaft Is Better than a Shaft

"Well, this..."

"Forget it, Xiao Li, come and introduce Mr. Xiao!"

Seeing that the question Xiao Feng asked was so unprofessional, Mr. Ma didn't know how to explain it to Xiao Feng.

Moreover, he was old after all, and he was indeed a little tired after traveling thousands of miles back and forth in a day.

He simply ordered the students who came with him to explain the principle of this pump to Xiao Feng.

And Xiao Feng didn't care about it, on the contrary, he showed an attitude of listening attentively.

After all, as a layman, he really doesn't know much about the submarine field.

In terms of aircraft, as a puppet army fan, he can barely be called a half-baked guy.

Speaking of this navy, he is completely blind.

Especially submarines, this kind of strategic killer, usually don't have many opportunities to show their faces outside, Xiao Feng is even more ignorant.

Xiao Li is a young man in his thirties who wears gold-rimmed glasses. His hair is polished and meticulously combed. He is completely different from those sloppy science and engineering dogs.

At this time, Academician Ma asked him to explain to Xiao Feng, but Xiao Li didn't have stage fright at all.

First, he took a serious look at Xiao Feng, and then began to explain to Xiao Feng.

"Actually, when it comes to pump pushing, it's not an advanced concept. It has existed as early as the last century."

"It was first applied to torpedoes, and later applied to many ships, mainly for temporary acceleration and so on."

"In terms of rapid acceleration and silence, this pump push technology does have advantages."

"But if we say the most valuable aspect, it must be applied to submarines, because this technology can greatly improve the silent effect of submarines."

"And for submarines, silence is life force!"

"As for our army's submarines, this Mr. Xiao must have heard that joke."

"The Americans once said that once our submarine is activated, they can hear it in Cam Ranh Bay..."

This is a famous joke from the 1990s,

Although a bit exaggerated suspicion, but said is also true.

At that time, our submarine didn't even know what a silent tile was!

So although we also had strategic nuclear submarines at that time, in fact, the Americans never took our submarines seriously.

Even their younger brothers, the Japanese, used conventional submarines to compete with our nuclear submarines. To be honest, the situation that time was very pessimistic.

In this situation, until later, when the former Soviet Union disintegrated, Mao Xiong came to a big sale for money.

After we bought the Kilo-class submarine of the black hole in the ocean from Mao Xiong, we changed a lot.

Only then did we know, damn it, they actually laid a layer of silent tiles on the outside of the iron shell of the submarine!

No wonder, Guizi's submarine sound is so low!

Later, we obtained the production technology of this silent tile from Mao Xiong through some means, which greatly improved the silent technology of our submarine.

But that's relatively speaking. If we really compare it with the submarines of the Americans, the noise of our submarines is at least 20 decibels higher than others.

why?

The reason is very simple. The power system of our submarine is not good, which leads to defects in the shape design of our submarine.

The submarines of the Americans all use a drop-shaped monocoque.

We are still using double hulls!

And what people use is the drop-shaped design, but ours is still a turtle-shaped design.

Although the double-hull is slightly stronger in terms of buoyancy than the single-hull, in fact, it is far behind in terms of internal loading capacity, maneuverability, and noise.

Our double shell, turtle-back shape, is actually a fur-like bear design.

No way, who told us to get our submarine design system from Mao Xiong.

But the reason why Mao Xiong adopts this design is because of the poor power system, but he can use the idea of ​​increasing the hull to weaken his own shortcomings.

The size of the family is huge, from the typhoon level of more than 40,000 tons, to the small 20,000 tons of the North Wind God, which one is not a big guy?

According to Mao Xiong's family's big business and big urine, they really pile up materials for you regardless of cost.

Titanium alloy hulls and the like are nothing to worry about. We can't afford to build such a submarine.

Even if it can be built, we can't afford it. This is not in line with the consistent tone of our navy.

So in recent years, we have been thinking about taking the Western path.

Academician Ma is a vanguard in this regard, especially in the concept of pumping.

In fact, speaking of pump pushers, the British, French and Americans have used them on their submarines as early as the last century.

However, it has not been popularized in a large area, because they use the axial pump push technology.

To put it bluntly, compared with the previous submarines, a fairing is installed around the periphery of the propeller behind the submarine.

This greatly reduces the noise caused by the propeller agitating the airflow.

In terms of current submarine technology, the biggest source of noise in a submarine is actually the airflow brought up by the propeller behind the submarine when it is rotating.

When the airflow is far away from the submarine, it will turn into bubbles, and the noise caused by the rising and bursting of these bubbles is what the submarine hates the most.

After the British put a cover on the propeller, they found that it could effectively reduce the noise, and then shared it with the French.

Later, the Americans also tried it on their Seawolf and Virginia, and it was indeed effective in reducing noise, but they did not promote it on a large scale.

Because of this technology, it seems a bit tasteless to them.

Because for conventional submarines, if this technology is used, a large number of permanent magnet motors will be used, which will greatly increase the cost at first.

However, using permanent magnet motors to work in the sea has to face a series of problems to be solved, such as seal corrosion, and the investment in this is very large.

And there is a shaft pump push, no matter how you do it, it can't eliminate the noise of the drive shaft rotation, in fact, it's a bit like taking off your pants and farting.

Moreover, the use of this technology does not greatly improve the power of the submarine.

The underwater speed of ordinary conventional submarines is seven to eight knots. After using this technology, it is not much faster.

So if you use this technology, there is no great benefit other than the excessive cost.

Therefore, the United States and the United Kingdom have not made great efforts to continue research.

But in this regard, only Japan and us have been quietly making efforts.

Some time ago, the Japanese Big Whale was a typical example.

The maximum diving depth of this submarine is said to be able to dive to 700 meters, which is already very scary.

You must know that Maoxiong's North Wind God can dive to a depth of 450 meters. The diving depth of this thing is actually 250 meters more than that of the North Wind God.

The most important thing is that he has the highest speed underwater, and he can actually reach 20.5 knots. Girl, are you still a conventional submarine?

Although I don't know if the Japanese have tampered with the data, the data just sounds scary.

And this has brought us considerable pressure.

Recently, Academician Ma is leading his team into the final critical moment of our third-generation nuclear submarine.

The nuclear submarines of our generation have several requirements. The first is a single hull, the second is a drop shape, and the most important thing is that our generation of nuclear submarines uses shaftless pumping technology!

You must know that so far, the pump-thrust submarines of several other countries in the world have all used axial pump-thrust technology.

To put it bluntly, no matter how it is designed, the principle is actually another drive shaft connected to the gas turbine or motor in the trial.

Then, through this drive shaft, the propeller rotor outside the hull is driven to obtain power.

And our five-axis pump push concept is amazing.

The drive shaft was directly canceled, and the blades of the propeller were directly fixed to the circular rotor in the pumping system.

The outside of the rotor is the stator, and then the motor is used to drive the rotor to rotate to obtain power.

This concept is very advanced and awesome, even bold.

You must know that iron-hulled ships have been born for hundreds of years, but it is the first time that the drive shaft and propeller are directly driven by the rotor.

And using this kind of rotor drive, the benefits are great.

First of all, the space contract is terminated. You must know that the space inside the submarine is very precious.

The second is to save most of the weight. You must know that most of the transmission shafts are made of copper alloy, which is expensive and heavy.

With the weight saved, at least five more missiles can be carried.

And the most important thing is that this kind of shaftless pump pushes, because the tip of the blade of the propeller points to the center of rotation.

This greatly reduces the ionized bubbles that would be brought about by the traditional propeller rotation, thereby greatly reducing the noise.

Secondly, because the transmission shaft is canceled, there is no mechanical noise generated when the transmission shaft rotates.

It not only reduces the noise, but also can effectively avoid the survivability under the attack of wake fish.

In addition, it can greatly increase the speed of the submarine...

Because of the use of motor drive, this advantage is great.

Everyone has seen electric cars now, and some people have even driven them. Some people must have experienced the quietness and rapid acceleration of electric cars.

And these characteristics are also applicable to the submarine that is used in the shaftless pump.

Submarines using this technology can quickly increase their speed from a static state to the fastest state.

And as long as you have enough power, you can keep running at a furious speed...

There is no need to take into account the working conditions of the engine like a shaft-driven submarine.

Therefore, the shaftless pump push mode is superior to the shaft pump push mode currently used in Britain, France, the United States and Japan.

Britain, France, Japan, the United States and other countries naturally know the benefits of this technology, so why didn't they develop it before?

This is mainly because they failed to overcome the ship's mechanical and electrical management system, but our Academician Ma led the team to make a breakthrough in this regard...

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