Automotive Black Technology Chapter 1169: : Start here!

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The automobile industry is a comprehensive assembly industry. A car is composed of tens of millions of parts and components. Each automobile OEM has a large number of related parts factories, so the automobile industry is closely related to many industrial sectors.

The automobile industry is also a highly technology-intensive industry, focusing on new materials, new equipment, new processes and new technologies in many scientific fields!

So the automobile industry is called the Pearl of Industry.

It is no exaggeration to say that if a country can produce excellent automobiles, it can produce most of the conventional equipment and weapons used in modern warfare.

This was perfectly confirmed in World War II. Whether it is aircraft, tanks, rockets, missiles, or warships and submarines, automobile manufacturing companies have done it all.

If you don’t want to talk about far away places, let’s talk about Japan.

Because it showed strong maritime military strength during the war, Japan's shipbuilding industry was completely stopped by the United States after World War II. Almost all shipyards that can manufacture more than 5,000 tons of ships were established during the US occupation.

However, after a decade of shipbuilding gaps, Japan can still rely on companies such as Mitsubishi and Kawasaki to build large warships, aircraft carriers and submarines.

Like Hyuga, Ise, and Atago, they are all made by automobile manufacturing companies.

The reason why this is possible is that in many cases, the technology possessed by a small car can be copied to other similar fields.

Zhengxin is the first car company in the country to have a large-scale experimental base covering complete vehicle technology. In the year when Zhengxin was established, Zhengxin’s R&D center set up a laboratory specifically responsible for noise suppression of complete vehicles, that is, Zhengxin NVH laboratory.

This laboratory is not just a unit. Instead, it includes multiple acoustic laboratories including vehicle semi-anechoic chamber, powertrain semi-anechoic chamber, structural modal test chamber, and component sound absorption and insulation test chamber. It is a laboratory cluster with system service capabilities for forward development of systems from complete vehicles to parts, from testing to CAE, and then to NVH performance, as well as systematic product optimization and engineering verification.

So what is this laboratory for?

This is to create a car with the best sound insulation effect and a quieter car. In the past few years, through extensive automotive research and development, the laboratory has accumulated a large number of noise suppression technologies ranging from a few screws to engines to the entire vehicle.

These technologies, combined with Li Fanyu’s design capabilities, can be applied to submarines, so it’s no problem!

"Director Xing, this is no problem!" Li Fanyu patted his chest on the spot.

Cut,

Isn’t it just a submarine?

The automobile industry is too comprehensive, so there is only one specialty.

In Li Fanyu's eyes, a submarine is nothing more than a larger car that doesn't run on the ground.

He thought so.

But when he really arrived at the place, he saw the huge submarine body undulating slightly with the sea water in the dock, and felt the murderous aura and shock emanating from this modern weapon, Li Fanyu felt...

Ahem, I seem to think a little too simply...

Seeing the shock on Li Fanyu's face, Xing Yaxin smiled slightly: "Director Li, what's wrong?"

"Ahem," Li Fanyu quickly came to his senses, "Um, was what I said before too full?"

Xing Yaxin shook his head and smiled, and said with relief: "You know, Director Li, I graduated from the Naval Submarine Academy. When I saw the real submarine for the first time, my expression was the same as yours. At that time, I was still As a student soldier, I just thought: This thing is so **** big, how long will it take to develop, design, and manufacture it? But it is easier said than done. As long as you start doing it, you will have a chance to do it well. This is support. I, and even all our comrades at the Submarine R&D Institute, have persisted in our beliefs for so many years despite our weak technical accumulation and no channels for learning!”

The expression on Li Fanyu's face gradually changed from stern to determined. He nodded heavily, "I understand Director Xing!"

"Then let's..." Xing Yaxin pointed at the Han-class nuclear submarine in the dock, whose shell was seriously damaged and was undergoing overhaul.

"Let's begin!" Li Fanyu smiled boldly and waved to the dumbfounded boys behind him, "It's time for us to go on stage!"

……

920524's request is actually very simple - do your best to suppress the submarine's underwater noise to a minimum!

But achieving this goal is quite complex and not easy.

Xing Yaxin’s proposal is to completely replace the current power system, completely abandon the power output motor currently used on submarines, and replace it with Zhengxin’s permanent magnet motor technology.

However, after conducting actual inspections, Li Fanyu believed that just a motor could not solve the current problem of underwater noise in submarines.

It is true that the drive motors used by these submarines in the South China Sea Fleet are quite noisy. However, after using his design expertise to examine the entire power systems of the three submarines, he found that regardless of whether it was a Han-class nuclear-powered submarine or the two Kilo-class diesel-electric conventional submarines, the design had been greatly optimized. room.

The Han-class nuclear submarine mainly uses a nuclear reactor to directly drive the gas turbine. Fortunately, the two Kilo-class submarines use large diesel engines to drive AC motors. From the transmission system, to the power supply system, to the power output terminal, the entire system is simply one The tuba's mechanical "band".

In addition, there are many loopholes in the power system layout. During Li Fanyu's first inspection alone, he discovered many places where transmission system noise could be directly transmitted to the submarine shell and resonate with seawater.

But if that’s all it is, it’s okay to say. With the current processing capabilities of the Zhengxin Industrial Base, it is completely possible to manufacture more precise parts with smaller tolerances according to the current submarine design structure. Use the perfect cooperation of machinery to partially solve the noise source.

But the problem is that there are too many such parts involved in the entire submarine. If this method of "precision" is used to reduce "noise", it is almost equivalent to remaking half of the submarine!

This approach is obviously too costly. The results achieved are not proportional to the investment.

"Brother Fan, these are the current problems. What do you think?"

After three days of structural investigation, the Zhengxin Power team summarized all the problems discovered so far. Looking at the dazzling array of "difficult and complicated diseases" on the blackboard, Liu Qing scratched the back of her head and asked.

Li Fanyu rubbed his chin with his fingers and tried to express his thoughts.

"Would it be better if...we directly replaced these submarines with a more direct power solution?"

"Brother Fan. What do you mean...?" Liu Qing was stunned and didn't understand.

Li Fanyu stood up, grabbed a large whiteboard, picked up the whiteboard marker, and drew a rough structural diagram of a Kilo-class submarine on the seat.

Then, he erased all the large diesel engines, circulation pumps, and transmission gearboxes on the Kilo-class submarine. In the power compartment of the submarine whose "belly" has been hollowed out, an icon representing the battery is drawn, and then two solid lines representing cables are drawn directly connected to the motor.

But when he reached the propeller, he frowned again.

After thinking for a while, his eyes lit up, as if he had figured out the whole situation, and he simply wiped off the propeller and changed it to another pump body mark.

“The air noise generated when the machinery in the cabin is running, the structural noise transmitted in the hull structure caused by the vibration of mechanical structural parts, the rotation noise of the propeller, and the hydrodynamic noise caused by the water flowing through the hull are the main problems of submarines. Source of noise. But after so many days of investigation, I think the first three are the most important, so let’s start from here!”

He threw the whiteboard pen on the ground and said firmly.