Wang Buan came to Pang Xihua.

Pang Xihua nodded reservedly, indicating that he had already said hello.

Sheng Huainan didn't look at Wang Bu'an much. Instead, he frowned at the propellers that had been modified without permission.

It's completely unreasonable!

A lot of data is beyond the scope of security.

It's very dangerous to go on like this!

Unprofessional people, doing unprofessional things, will definitely have big problems in the end.

Industrial manufacturing is not a sloppy thing.

"Chief Engineer Wang, who designed this propeller?" asked Pang Xihua cautiously.

"Designed by the shipyard's own workers. Wang Buan replied.

"Verified?"

"Nope. ”

"Aren't you worried about shipwreck?"

"So serious?"

"Of course. ”

Pang Xihua said solemnly.

For people in the industry, the design of propellers is a very profound knowledge.

In general, the propeller design conditions correspond to the state of the ship when it is fully loaded. In this navigation state, the main engine sends out the predetermined power, the propeller efficiency reaches the best, and the boat, the engine and the propeller are ideally matched. However, if the design parameters are not selected properly, it will cause the propeller to produce the phenomenon of "light load" or "heavy load", "light load" means that after the propeller reaches the design speed, it can not fully absorb the torque of the main engine, and the main engine can not send the predetermined power; "heavy load" means that when the propeller has not reached the design speed, the torque of the main engine has reached the maximum value, and the main engine can not send the predetermined power.

The resistance of the ship has a great relationship with the size of the ship, the line type and other factors, and the resistance value of the same ship may be very different if it is calculated by different formulas. If the calculated drag value is greater than the actual ship resistance, the speed of the actual ship will be greater than the estimated speed, but the propeller will be in the "light load" state, and vice versa, the propeller will be in the "heavy load" state.

Now, the propellers that have been modified without authorization at the New Hongyang Shipyard have many problems.

First, the propeller diameter is too large. Resulting in too much resistance. It is easy to generate heavy loads. Prone to heat.

Second, it is difficult for marine diesel engines to propel such large propellers.

Either way, it's easy to go wrong.

Or, it's the propeller's bearings that overheat, overwhelm them, and eventually break.

Or, the propeller has been running at a low speed and is not able to play a smooth role in propulsion. The impetus has always been insufficient.

Wang Buan disagreed.

If it was an ordinary power system, of course, the ship would be destroyed and people would die.

However, the power system he used, each component is a tertiary cemented alloy, plus the forging of a 100-million-ton hydraulic press. Absolutely no problem.

What's the point of bringing a small 1,600-ton fishing boat? It's no problem to bring a 160,000-ton giant ship.

Pang Xihua knows about tertiary cemented carbide.

But I don't know about the 100 million ton hydraulic press.

"You came to me, is there anything wrong?" Wang Bu'an staggered the topic.

"I'll show you a drawing. Pang Xihua said.

A man behind him immediately handed over an oversized drawing.

Wang Buan glanced at it casually.

It's a big crankshaft.

Feels like it's for a mega wheel?

The total length is 23.06 meters, and the total weight is 456.7 tons. Sure enough, it's a super big guy.

As a key component of marine engines, marine crankshafts are known as the "heart" of marine diesel engines and play a vital role in the safety of ships. Due to its large weight, high processing accuracy requirements, and high difficulty in manufacturing technology, the industry often uses "whether it has the manufacturing capacity of large crankshafts" to measure the level of a country's shipbuilding industry.

At present, there are not many countries in the world that can manufacture such a huge crankshaft.

The neighbors are Smecta's Doosan Heavy Industries and Hyundai Heavy Industries.

A little further afield, it is Kobe Steel and Mitsubishi Heavy Industries of Toei.

"This is our newest product. Pang Xihua said, "It is used for the diesel engine of the 21,000TEU standard container ship." ”

"Does it have anything to do with me?" Wang Buan asked suspiciously, "You all made it!"

"There's some relationship. Can we find a quiet place to talk?"

"Yes, please. ”

Wang Buyan led them into the conference room.

Both sides sat down separately. A few beautiful interns served tea with a little nervousness.

They all felt that Pang Xihua was very big.

"Get out, all of you. ”

"Close the door by the way. ”

Wang Buan waved his hand and let them all go out.

Pang Xihua's meaning is obviously to be kept secret. Even if the level of secrecy is not high, it must be kept secret.

"Please. ”

"Good. ”

Pang Xihua nodded.

His assistant pulled out more drawings.

It is also a large marine crankshaft. There is a slight difference, though.

"This is a 12G80ME-C crankshaft. The longest stroke and the largest weight per piece. Pang Xihua said slowly, "We produced it two years ago." ”

"Awesome. Wang Buan nodded quietly, "No wonder our warships can make dumplings." ”

Pang Xihua waved his hand, and the assistant immediately rolled out another drawing.

It's still a marine crankshaft. There are still some slight changes.

"This is the first extra-large butt type 12S90GT-K crankshaft in China. We produced it a year ago. Pang Xihua said.

"Awesome. Wang Buan still nodded silently. He waited for the rest of the story.

"What you just saw is the 12S100ME-C, our latest product. After the final joint strict inspection by MAN Patent Company, China Classification Society, and Lloyd's Register of Shipping, it was confirmed that it was qualified, and it can be used with MAN's ultra-large gas turbines. ”

"Any questions?"

"Nope. ”

"Then you come to me......"

"I want to tell you that we worked so hard to make such a big thing, and in the end we didn't make any money. ”

"This ......"

"The patents belong to MAN, and the technology is also MAN, and eventually sold to MAN. We're just a foundry. ”

"Does it have anything to do with me?"

"Absolutely. Pang Xihua suddenly became excited, "We don't want to continue to be a foundry!"

"However, I don't know how to design!" Wang Buan regretfully spread his hands.

Marine crankshaft, he can't help for the time being.

The technical content of this thing is very high, and the requirements for raw materials are also very high.

However, none of this is the crux of the matter.

The point is, it doesn't have a market!

The crankshaft is used with a super-large diesel engine or a gas turbine.

It is only needed in the production of very large diesel engines, or very large gas turbines.

Wang Buan is not ready to produce these behemoths.

There's no need for it!

"It doesn't matter if you don't understand. We have a lot of people who understand. ”

"And what do you need?"

"Hydraulic presses, machine tools, raw materials, we need them all!"

"Huh?"

"The steel is made in Kobe, the bearings are NHK, the hydraulics are from Mitsubishi Heavy Industries, and the fasteners are from thyssenkrupp. We just make a little bit of processing fee. ”

"Calm, calm. ”

Wang Buan said slowly. It can be seen that Pang Xihua is really angry.

It's no wonder that Pang Xihua is angry.

There are indeed some insiders who are more depressed.

How so?

Large marine crankshafts require special parts.

After all, the amount of this thing needs to be used is very small. It may not be used more than ten times a year. For this reason, the cost of opening the mold can be said to be very high.

For example, Wang Buan's most familiar bearing. The current bearing specifications definitely do not include bearings for such large crankshafts. This kind of non-standard specification bearing, it must be pre-customized, and a considerable amount of deposit needs to be paid. Otherwise, others won't do it for you. What if the mold is opened here, but you regret it?

This is normal market behavior. Of course, there's nothing wrong with that.

What's wrong is the premium.

Because it needs to be specially made, molds need to be opened, and the quantity is small, there are few factories that are willing to accept orders.

In addition, there is one more point that is very important, very crucial.

That's technology and craftsmanship.

With such a large marine crankshaft, you can imagine how much force it is subjected to.

According to the description of the design drawings, the ball of just one bearing is the size of a tennis ball. No kidding. It's really the size of a tennis ball.

Individual unconventional balls, even the size of a volleyball. All of these also need to be specially made.

Since the balls are all specially made, there is no need to talk about grooves, coats, etc.

The force required for the bearing is very terrifying.

According to the instructions, the force on one ball alone is more than 5,000 tons.

If it is a complete set of bearings, the force is at least 50,000 tons.

What kind of raw materials are needed?

Ordinary raw materials are definitely not possible.

Only very special cemented carbide.

"We made a proposal to use our own hard carbide. As a result, the other party did not accept it. Pang Xihua said indignantly, "The other party specified that it must be a special alloy made of Kobe Steel." Kobe Steel deliberately raised prices by more than 75%. Let us suffer a big loss for no reason. ”

"We offered to process bearings and fasteners ourselves, but MAN also refused. The young man with a straight waist said, "All the main parts must be made of the specified brand products." Otherwise, when the final test is carried out, there will be no way to pass. ”

Wang Bu'an nodded thoughtfully.

He could understand Pang Xihua's anger.

That's what it feels like to be at the mercy of people.

You can't do it.

Others can do it.

This is the harsh reality.

It's like in the early days of the founding of the country, when the navy was first built, and the Soviets sold us four obsolete battleships. It ended up asking us for seventeen tons of gold.

That's seventeen tons of gold. In the early days of the country, this was a very large amount of money.

Even if it is *** and Premier Zhou, they must consider one or two.

However, in the end, we still can't afford not to give.

Because we can't produce large battleships ourselves. But we also need large naval warships.

What to do?

I can only pinch my nose and give gold.

If you fall behind, you will be beaten.

This is true no matter what time, what place, what world, what plane.

Why do we have to desperately make dumplings now?

I just don't want to be beaten.

I just don't want to be bullied.

I just don't want to be burned to my doorstep.

However, the problem with large marine crankshafts is that we are still at the mercy of people. In other words, it is partially controlled by others.

At the very least, we've mastered the manufacturing technology. Only some parts are missing.

In fact, we can also produce components.

In fact, the quality of our parts is also good. The quality of its own products is still very good.

If not, how could our warships be able to dump in large quantities?

No one else can sell you that many marine crankshafts. Someone else will definitely strangle your neck.

Only by self-reliance can we have enough food and clothing.

This is true at all times.

However, foreigners just don't believe it.

They only trust brands from developed Western countries.

"Then what am I going to do?" Wang Buan said slowly, "The raw materials are all given to you." ”

"I hope you can make a one-to-one version according to this specification. We bear the cost. Pang Xihua said in a deep voice, "I am going to participate in the Stockholm crankshaft competition in three months." ”

"Crankshaft race?"

"That's right. It is also called a sea marathon. ”

"Oh. ”

Wang Bu'an said that he had never heard of the term sea marathon.

Is the marathon on land known, at sea?

How to run at sea?

Around seven continents and four oceans?

That's kind of interesting......

"They have big simulators. "It is possible to simulate the long-term high-load operation of the crankshaft." ”

"What about the rules of the game?" Wang Buan didn't really have any interest in competitions or anything like that.

For example, Xiao Cheng's bearing competition, he did not participate.

The crankshaft competition was held in Stockholm, and he would not have participated in person.

At this time, I believe that the relevant parties will not let him go abroad.

Safety comes first at all times.

"Rankings are determined by downtime. The young man said.

"How long is it?" asked Wang Bu'an curiously.

"Five thousand hours. ”

"So long?"

"That's normal running time. It's not running at full capacity and at high speed. ”

"What if it's running at full capacity and at high speed?"

"The best time was 86 hours, 37 minutes and 29 seconds. ”

"So short?"

"Of course. ”

The young man introduced himself and said that his name was Zhuang Lang.

He is a technician of Northern Heavy Industry and a disciple of Sheng Huainan. The main research direction is marine crankshafts.

He is responsible for the upcoming World Marine Crankshaft Competition in Stockholm.

The young man is strong-blooded, energetic, and wants to get good grades.

It's a chance to prove yourself.

In order to ensure the final effect of the game, they decided to come to Wang Buan.

Only Wang Buan can give them confidence.

"I don't say yes. Wang Buan shook his head and said bluntly.

"Why?" Pang Xihua asked solemnly.

"Because it's your game. I can't cook for me. ”

"Don't you want us to win the competition? Don't you want to make a name for ourselves in the world?"

"Of course I hope. ”

Wang Buan said slowly. Signal the other party to be calm.

This competition, of course, is very important. He also hopes that the purely domestic marine crankshaft can achieve excellent results in the world.

However, Wang Buan did not want to process marine crankshafts by himself.

This is completely unnecessary.

The quality of the marine crankshaft manufactured by the North Shipbuilding Industry is already very high.

They have what it takes to achieve great results.

Of course, it's okay to add a little boost.

For example......

Today's fifth watch is here.