In the laboratory, Li Zhen walked to the blackboard and drew the crank connecting rod he imagined.
Everyone intuitively saw the image of the crank connecting rod, and their hearts became even more ecstatic.
The problem of the century has been solved, finally solved.
Because Xu Shenxue wanted to treat everyone to eat watermelon, Li Zhen had a sudden inspiration while taking the watermelon, and solved this century-old problem. This is a difficult problem like a natural chasm.
Li Zhen couldn't help but think back, and seemed to remember someone vaguely saying to him that steam engines in ancient times had also gone through too many vicissitudes, right? It's not that easy either. The steam engine first appeared as a steam jet. The complete appearance of the crank connecting rod spanned hundreds of years. After several generations of continuous improvement...
He forgot whether such a thing happened, but remembered that someone seemed to have said it once. Can not remember.
unimportant.
Ten thousand years later, he finally solved the operation of the power of change.
Liu Jinghong suddenly frowned: "No. There is a problem, a problem that the crank connecting rod cannot solve."
Li Zhen asked quickly: "Say."
Liu Jinghong said: "We need to convert the linear motion of the steam engine into rotational force, which is good. But this crank connecting rod only solves the rotational force, but it blocks the way, which means there is no power."
"Um?"
"You see, if the steam pushes the piston and the crank connecting rod, it causes the outer disk to rotate half a turn. But it still cannot be reset. We need to make the piston move repeatedly, push it out, and retract it, so that it can move back and forth. . This can be pushed out and change the operation of the force, but it cannot be retracted."
Liu Jinghong pointed to the blackboard: "Because, in a closed cylinder, it is filled with internal pressure and internal energy of air. It is constantly expanding, so there will be a continuous force pushing the piston forward. The piston passes through the connecting rod , pushing the outer circle can rotate half a turn. However, once it rotates half a circle and reaches the limit of the connecting rod, it will inevitably push the piston back. But there is continuous energy in the cylinder, wouldn't it push the piston back? Stuck? In this case, this disk can only rotate half a turn."
After Liu Jinghong finished speaking, some students believed it, while others shook their heads, knowing in their hearts that it was definitely not what Liu Jinghong said.
Li Zhen smiled brightly: "The question you want to ask can be summarized in one sentence: the internal force output drives the piston and connecting rod, so that the disc can only rotate half a circle. However, due to the continuous output from the inside, the circle rotates It will get stuck halfway, and the force that is constantly being output will turn into resistance? Is this what you mean?"
"Yes. Maybe I didn't explain it clearly, but that's what it means."
"Senior Liu's question was very thorough. But he overlooked one point."
"What?"
Everyone immediately pricked up their ears.
Li Zhen pointed to the disk drawn on the blackboard and said: "However, if the disk is designed to be larger and its mass exceeds the thrust of the steam, then after the steam pushes the disk for half a turn, the disk will Inertia is generated, and the inertia will drive the disc to continue to rotate for the second half of the circle. During the second half of the circle, the connecting rod will drive the piston to reset. Then the steam will push the piston and connecting rod out again, pushing the disc again Rotate.
As the inertia increases, the piston will work faster and repeat faster. And the disk will spin faster. The force of the piston converts linear motion into circular motion. The inertia generated by the circular motion is compensated back to realize the repeated movement of the piston. This is a cycle. "
"That's right!"
Liu Jinghong exclaimed and slapped his head: "I forgot, ignored. The rotation of the disk itself will also generate inertia."
Qin Enze took a breath: "It looks simple, but it's so complicated inside. How did you come up with it?"
"Oh, I knew just now that the disc must drive the connecting rod and reset the piston. But I just didn't think about how to explain it. Alas, I knew the principle just now, but I just couldn't explain it."
"Stop bragging. Hindsight?"
"I also thought about it. The disc will definitely return to drive the piston to reset. This is a situation where you help me and I help you, resulting in force conversion."
"Inertia, inertia, how could I ignore this?"
“…”
Li Zhen clapped his hands: "Quick, we need to conduct physical verification immediately. Senior Liu, please calculate the cost of this model."
Liu Jinghong nodded excitedly, and immediately began to calculate the cost. After a moment, he said: "We only need to process the assembly parts. I think these things are now in the top secret stage, and blacksmiths and cobblers cannot be allowed to learn the complete set. The cost is not expensive, probably It only costs more than five hundred coins, but we have to assemble it ourselves.”
Li Zhen nodded: "Then get a few people and go to the city as soon as possible to build the organization back up. It must be fast."
"clear."
Liu Jinghong ordered seven or eight people to join him. There were more people to avoid making mistakes.
Li Zhen instructed: "The rubber head of the piston must be chosen correctly. There must be no air leakage in the cylinder."
"I know that there is a shop that specializes in making rubber. I will make it according to the mold, and it will never be wrong."
"Also, the metal disc must also be of high mass. It must be round enough."
"Don't worry about it. I'm not going to get you an oval back."
“…”
Liu Jinghong and others excitedly went to find someone to make parts, but Li Zhen finally breathed out and lay down with a smile on his face. He closed his eyes and fell asleep with a smile on his face.
Been tired for too long. Been nervous for too long.
Until today, I can finally relax.
The other students in the laboratory also sat down exhausted. After being obsessed for more than a week, I finally relaxed completely today.
Some students who worked extremely hard still did not relax at this moment.
Just like Fang Hanxian.
Many people were slumped on the ground, relaxing and falling asleep, but Fang Hanxian took out his notebook, kept thinking, and wrote things down in his notebook.
The notebooks are all filled with tiny fonts, densely packed. Except for him, few people can understand it.
It starts with the conversion of the chemical energy of water into the internal energy of air, and then the conversion of steam power into mechanical energy.
Then linear motion is converted into circular motion.
Bit by bit, everything he learned from Li Zhen and everything he figured out was recorded in his notebook.
Gradually, he suddenly woke up and discovered an amazing fact.
Two weeks ago, I was a freshman, knowing nothing and understanding nothing.
Two weeks later, my notebook represents what I learned in these two weeks: energy conversion, air internal energy, vacuum pressure, energy conservation...
He discovered that perhaps what he was participating in did not seem to be an experiment to restore the steam engine. I may be participating in an academic revolution that has never happened in Kyushu.
From the restoration of products, the reform gradually moves closer to the restoration of academics.
"This is academic."
Fang Hanxian murmured and fell into deep thought.
(End of chapter)