In the laboratory, Li Zhen walked to the blackboard and drew the crank connecting rod he had envisioned.

Everyone intuitively saw the image of the crank link, and their hearts were even more ecstatic.

The problem of the century has been solved, and it has finally been solved.

Because Xu Shenxue wanted to invite everyone to eat watermelon, Li Zhen had a flash of inspiration in the process of taking watermelon, and ended up with the problem of the century. It's a big problem.

Li Zhen couldn't help but think about it, as if he remembered that someone had vaguely said to himself that the steam engine in ancient times had also experienced too many vicissitudes, right? It's not that easy, either. The steam engine first appeared, only as a steam jet. The crank connecting rod completely appeared, spanning hundreds of years. It has undergone continuous improvement over several generations......

He had forgotten if there was such a thing, and remembered that someone seemed to have said it. I can't remember.

Unimportant.

Ten thousand years later, he finally solved the operation of the force of change.

Liu Jinghong suddenly frowned: "No." There's a problem with this, something that the crank link can't solve. ”

Li Zhen hurriedly asked, "You say." ”

Liu Jinghong said: "We need to convert the linear motion of the steam engine into a rotational force. But this crank link only solves the rotational force, but it blocks one way, that is, there is no power. ”

"Huh?"

"You see, if the steam pushes the piston and the crank linkage, it causes the outer disc to rotate half a turn. But it still can't be reset. We need to make the piston move repeatedly, push it out, and retract it, so that we can move back and forth. This can be pushed out, it can change the operation of the force, but it can't be retracted. ”

Liu Jinghong pointed to the blackboard: "Because, in the closed cylinder, it is full of internal pressure and air internal energy." It is constantly expanding, so there is a continuous force that constantly pushes the piston forward. The piston rotates half a turn by pushing the outer circle through the connecting rod. However, once it has rotated half a turn and reaches the limit of the connecting rod, it will inevitably push the piston back. But if there is continuous energy in the cylinder, wouldn't that jam the piston? In this way, this disc, it can only rotate half a turn. ”

After Liu Jinghong finished speaking, some students thought so, while others shook their heads, knowing in their hearts that it was definitely not what Liu Jinghong said.

Li Zhen smiled: "The question you want to ask, in a word: the internal force output drives the piston and connecting rod, so that the disc can only rotate half a turn." However, because the internal is constantly outward, and the circle rotates half of it, it will get stuck, and the continuous output force will become resistance? Is that what it means? ”

"Yes. Maybe I can't explain it clearly, but that's what it means. ”

"Senior Liu's questions are very thorough. But one thing is missing. ”

"What?"

Everyone hurriedly pricked up their ears.

Li Zhen pointed to the disc drawn on the blackboard and said, "However, if this disc is designed to be relatively large, and its mass exceeds the thrust of steam. Then after the steam pushes the disc half a turn, the disc will produce an inertial force, and the inertia will drive the disc to continue to complete the second half of the turn. In the process of turning to the second half of the revolution, the connecting rod will drive the piston to reset. The steam then pushes the piston and connecting rod out again, pushing the disc to rotate again.

As the inertia force increases, the piston works faster and repetitions faster. And the disc will spin faster. The force of the piston is converted from linear motion to circular motion. The inertial force generated by the circular motion is compensated back to realize the repeated motion of the piston. It's a cycle. ”

"That's right!"

Liu Jinghong exclaimed in surprise and patted his head: "I forgot, ignored it." The rotation of the disc itself also generates an inertial force. ”

Qin Enze gasped: "It looks simple, but it's so complicated inside." How did you come up with it? ”

"Well, I knew just now that it must be the disc that will drive the connecting rod and reset the piston. But I just didn't know what to say. Alas, I knew the principle just now, but I just couldn't say it. ”

"Don't brag. Hindsight? ”

"I thought about it too. The disc will certainly return to drive the piston to reset. This is a situation where you help me and I help you, and the power is transformed. ”

"Inertial force, inertial force, how did 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, immediately began to calculate the cost, and said after a while: "We only need to process the assembly parts." I think these things are in the top secret stage now, and I can't let the blacksmith and the cobbler learn the whole set. It's not expensive, it only costs about 500 yuan, but we have to assemble it ourselves. ”

Li Zhen nodded: "Then go to a few people, you go to the city as soon as possible and build the formation back." Be quick. ”

"Understood."

Liu Jinghong ordered seven or eight people to join him, and there were many people to avoid mistakes.

Li Zhen instructed: "The rubber head of the piston must be selected." There can be no air leakage in the cylinder. ”

"I know, there is a shop that specializes in rubber, and I will make it according to the mold, absolutely not a penny."

"Also, the metal disc must be of high quality. Be round enough. ”

"Don't worry about it. I'm not going to get you an oval one back. ”

“……”

Liu Jinghong and the others rushed to find someone to make parts, and Li Zhen finally exhaled and lay down with a smile on his face. I closed my eyes and fell asleep with a smile on my face.

Tired for too long. Nervous for too long.

Until today, it is finally possible to relax.

The other students in the laboratory also sat down exhausted. After more than a week of going crazy, until today, I finally completely relaxed.

And some extremely hard-working students still did not relax at this moment.

For example, Fang Hanxian.

Many people sat on the ground and relaxed, falling asleep, but Fang Hanxian took out his notebook, kept thinking, and wrote things down in the notebook.

The notebook is full of small print, densely packed. Few people can understand it except him.

Starting from the conversion of chemical energy of water to internal energy of air, and then to the conversion of steam force into mechanical energy.

and then to linear motion to circular motion.

Little by little, everything he learned from Li Zhen and everything he figured out was recorded in his notebook.

Gradually, he suddenly woke up and discovered a remarkable truth.

Two weeks ago, I was a freshman, I didn't know anything, I didn't understand anything.

After two weeks, my notebook represents what I learned during these two weeks: energy conversion, air energy, vacuum pressure, conservation of energy......

He found that perhaps he was not involved in an experiment to restore the steam engine. I may have participated in an academic revolution that had never happened in Kyushu before.

Reform from the product of restoration to the reform of academic restoration.

"It's academic."

Fang Hanxian muttered and fell into deep thought.