Chapter 198: Super large ship crankshaft

Wang Bu'an came to Pang Xihua.
Pang Xihua nodded reservedly, indicating that he had already said hello.
Sheng Huainan didn't think much of Wang Bu'an. Instead, he frowned at the propellers that had been modified without authorization.
It's totally unreasonable!
A lot of data is beyond the security range.
This is very dangerous!
Unprofessional people who do unprofessional things will definitely have big problems in the end.
Industrial manufacturing is not something to be sloppy.
"Master Wang, who designed this propeller?" Pang Xihua asked cautiously.
"Designed by the shipyard's own workers." Wang Bu'an replied.
"Has it been verified?"
"No."
"Don't you worry about the ship's destruction and death?"
"so serious?"
"Of course."
Pang Xihua said solemnly.
For those in the industry, the design of propellers is a very advanced knowledge.
Under normal circumstances, the design conditions of the propeller correspond to the state of the ship at full load. In this sailing state, the main engine sends out the predetermined power, the propeller efficiency reaches the best, and the ship, engine and propeller match ideally. However, if the design parameters are not selected properly, it will cause the propeller to produce "light load" or "heavy load". "Light load" means that after the propeller reaches the design speed, it cannot fully absorb the torque of the main engine and the main engine cannot deliver 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 cannot deliver the predetermined power either.
The resistance of a ship has a lot to do with factors such as the size and line type of the ship. For the same ship, the resistance value may be very different if it is calculated by different formulas. If the calculated value of resistance is greater than the actual ship's resistance, the speed of the actual ship will be greater than the estimated speed, but the propeller is in a "light load" state; otherwise, the propeller is in a "heavy load" state.
Now, the propeller modified by Xinhongyang Shipyard without authorization has many problems.
First, the propeller diameter is too large. Cause too much resistance. Prone to overload. Easy to heat up.
Second, it is difficult for marine diesel engines to propel such a large propeller.
No matter which one it is, it is easy to go wrong.
Or, the bearing of the propeller is overheated, overwhelmed, and eventually damaged.
Or, the propeller has been running at a low speed and cannot play a smooth propulsion effect. The impetus is always insufficient.
Wang Bu'an was disapproving.
If it is an ordinary power system, of course the ship will be destroyed.
However, every part of the power system he uses is made of three-grade hard alloy, plus the forging of a billion-ton hydraulic press. There will never be a problem.
What does it mean to bring a small 1600-ton fishing boat? There is no problem with a huge ship of 160,000 tons.
Pang Xihua knows the level 3 hard alloy.
But I don't know the billion-ton hydraulic press.
"You come to me, what's the matter?" Wang Bu'an staggered the subject.
"Show you a drawing." Pang Xihua said.
A person behind him immediately handed over a large drawing.
Wang Buyan glanced casually.
A big crankshaft.
It feels like it is used by a super giant wheel?
The total length is 23.06 meters and the total weight is 456.7 tons. Sure enough, it's a huge 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 heavy weight, high processing precision requirements, and high manufacturing technology difficulty, the industry often uses "whether it has the ability to manufacture large crankshafts" to measure the level of a country's shipbuilding industry.
Currently, few countries in the world can manufacture such a huge crankshaft.
The neighbors are Doosan Heavy Industries and Hyundai Heavy Industries of Smecta.
A further point is Dongying's Kobe Steel and Mitsubishi Heavy Industries.
"This is our latest product." Pang Xihua said, "It is used for 21000teu standard container freighter diesel engines."
"Does it have anything to do with me?" Wang Bu'an asked suspiciously, "You all made it!"
"There is some relationship. Can we find a quiet place to talk?"
"Yes! Please."
Wang Buyan led them into the meeting room.
Both sides sat down separately. Several beautiful interns served tea with a little nervousness.
They all feel that Pang Xihua has a big backing.
"You all go out."
"Close the door by the way."
Wang Bu'an waved his hand and let them all go out.
What Pang Xihua meant was obviously to be kept secret. Even if the level of confidentiality is not high, it must be kept confidential.
"please say."
"it is good."
Pang Xihua nodded.
His assistant produced more drawings.
It is also a large marine crankshaft. But there is a slight difference.
"This is a 12g80me-c crankshaft. It has the longest stroke and the largest single weight." Pang Xihua slowly introduced, "We produced it two years ago."
"Awesome." Wang Bu'an nodded calmly, "No wonder our warship can lay dumplings."
Pang Xihua waved his hand, and the assistant immediately rolled out another drawing.
It is still a marine crankshaft. There are still some slight changes.
"This is the first domestically large joint 12s90gt-K crankshaft. We produced it a year ago." Pang Xihua said.
"Awesome." Wang Buan nodded silently. He waited.
"What you just saw is 12s100me-c, our latest product. After the final joint rigorous inspection by Man Patent Company, China Classification Society, and Lloyd's Register of Shipping, it is confirmed to be qualified and can be matched with Man's super large gas turbine. use."
"Any questions?"
"No."
"Then you come to me..."
"I want to tell you that we worked so hard to make such a big thing, but in the end we didn't make much money."
"This……"
"The patent belongs to the man company, and the technology is also owned by the man company. It was eventually sold to the man company. We are just a foundry."
"Is it related to me?"
"Of course there is." Pang Xihua was suddenly excited, "We don't want to continue to be a foundry!"
"But, I don't know how to design!" Wang Buyan said regretfully.
For the crankshaft for ships, he is temporarily helpless.
The technical content of this thing is very high, and the requirements for raw materials are also very high.
However, these are not the key to the problem.
The point is, it has no market!
The crankshaft is matched with a super large diesel engine or gas turbine.
It is only needed when producing super large diesel engines or super large gas turbines.
Wang Buan is not ready to produce these behemoths.
No need at all!
"It doesn't matter if you don't understand. We have a lot of people who understand."
"Then what do you need?"
"Hydraulic machines! Machine tools! Raw materials! We need them all!"
"what?"
"The steel is Kobe Steel, the bearings are, the hydraulics are from Mitsubishi Heavy Industries, and the fasteners are from ThyssenKrupp. We just make a little processing fee."
"calm down."
Wang Bu said slowly. It can be seen that Pang Xihua is really angry.
No wonder Pang Xihua will be angry.
There are indeed some inside stories that are rather depressing.
how to say?
For large-scale marine crankshafts, all required parts are specially made.
After all, the amount of this thing that needs to be used is very small. It may be used less than ten times a year. For this reason, the cost of mold opening can be said to be very high.
For example, Wang Buyan's most familiar bearing. The current bearing specifications certainly do not include bearings for such a large crankshaft. Such non-standard bearings must be customized in advance, and a considerable amount of deposit must be paid. Otherwise, others will not help you. What if the mold is opened on this side, but you regret it on the other side?
This is normal market behavior. Of course there is nothing wrong.
What's wrong is the premium.
Because of the need for special manufacturing, the need to open molds, and the small quantity, so few factories are willing to accept orders.
In addition, there is another very important, very critical.
That is technology and craftsmanship.
It is conceivable how much force is exerted on such a large marine crankshaft.
According to the design drawings, the ball of a bearing is the size of a tennis ball. It's not a joke. It's really the size of a tennis ball.
Some unconventional are even the size of a volleyball. These all need to be specially made.
Since the are specially made, there is no need to mention the grooves, jackets and the like.
But the force required by the bearing is very scary.
According to the instructions, the force of a ball exceeds 5000 tons.
If it is a complete set of bearings, the force is at least 50,000 tons.
What kind of raw materials are needed?
Normal raw materials are definitely not possible.
Only very special hard alloys.
"We made a suggestion to use our own hard alloy. The other party did not accept it." Pang Xihua said angrily, "The other party specified that it must be a special alloy of Kobe Steel. Kobe Steel deliberately increased the price by more than 75%. . Let us suffer a big loss for no reason."
"We proposed to process the bearings and fasteners ourselves, but Manenchai {man} rejected it." The young man with a straight waist said, "All main parts must be of designated brands. Product. Otherwise, at the final inspection, there will be no way to pass."
Wang Bu'an nodded thoughtfully.
He can understand Pang Xihua's anger.
This is how it feels to be controlled.
You can't do it.
Others can do it.
This is the cruel reality.
It was like the early days of the founding of the People’s Republic of China, when the Navy was first built, and the Soviets sold us four obsolete warships. The result was 17 tons of gold from us.
A full seventeen tons of gold. In the early days of the founding of the People’s Republic of China, this was a very significant amount of money.
Even and Premier Zhou must consider one or two.
However, in the end we still had to give it.
Because we cannot produce large warships by ourselves. But we also need large naval warships.
How to do?
You can only pinch your nose to gold.
Be beaten if you fall behind.
No matter what time, place, world, or plane, this is true.
Why do we desperately put down dumplings now?
Just don't want to be beaten.
Just don't want to be bullied.
Just don't want to be burned to the doorstep of the war.
However, the problem with crankshafts for large ships is that we are still controlled by others. In other words, it is partly controlled by others.
At least, we have mastered the manufacturing technology. Only some parts are missing.
In fact, we can also produce parts.
In fact, the quality of our parts is also good. The quality of North Shipbuilding Industry's own products is still very good.
If not, how could our warships dump dumplings in large quantities?
It is impossible for others to sell you so many marine crankshafts. Others will definitely strangle you.
Only by self-reliance can we have enough food and clothing.
This is always the case.
However, foreigners just don't believe it.
They only believe in the brands of western developed countries.
"Then what am I going to do?" Wang Bu said calmly, "I have given you all the raw materials."
"I hope you can make a one-to-one version according to this specification. We will bear the cost." Pang Xihua said deeply, "Prepare to participate in the Stockholm Crankshaft Competition in three months."
"Crankshaft race?"
"Yes. It's also called a sea marathon."
"Oh."
Wang Bu'an said that he had never heard of the term sea marathon.
You know the land marathon, at sea?
How to run at sea?
Surrounding the seven continents and four oceans?
That's kind of interesting...
"They have a large simulator." The young man said, "it can simulate long-term high-load operation of the crankshaft."
"What about the rules of the game?" Wang Bu'an actually has no interest in games or the like.
For example, Xiao Cheng did not participate in the bearing competition.
This crankshaft competition was held in Stockholm, so he wouldn't participate in it personally.
At this time, I believe that relevant parties will not let him go abroad.
At all times, safety comes first.
"According to the trouble-free time to determine the ranking." The young man said.
"How long is it generally?" Wang Bu'an asked curiously.
"Five thousand hours."
"So long?"
"That's normal running time. It's not running at full load and high speed."
"What if it is running at full load and high speed?"
"The best result is 86 hours, 37 minutes and 29 seconds."
"So short?"
"Of course."
The young man introduced himself and said 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.
Young people are full of energy and energy, and want to get good results.
This is an opportunity to prove yourself.
In order to ensure the final result of the game, they decided to come to Wang Bu'an.
Only Wang Bu'an can give them confidence.
"I don't agree." Wang Buyan shook his head and said bluntly.
"Why?" Pang Xihua asked seriously.
"Because this is your competition. I can't overdo it."
"Don't you want us to win the competition? Don't you want to make our reputation in the international arena?"
"Of course I hope. UU reading www.uukanshu.com"
Wang Bu said slowly. Beckon the other party to stay calm.
This competition is of course very important. He also hopes that the purely domestic marine crankshaft can achieve excellent results internationally.
However, Wang Bu'an does not want to process marine crankshafts by himself.
This is completely unnecessary.
The quality of the marine crankshaft manufactured by North Shipbuilding Industry is very good.
They are fully capable of achieving good results.
Of course, it is possible to add a little boost.
For example...
Today is the fifth one.
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