The Fall of Daming - Song Yingxing built a steam locomotive

Zhao Wen also clearly remembers the sentence he said when he first stepped on the long-distance bus to the university, his father took out a stack of neatly stacked change from his pocket with his calloused hands and handed it to him, "Child, poor family and rich road, you take this money to buy something to eat on the road." ”

Zhao Wen put down his chopsticks and looked up at the roof, forcing the tears that were about to slip back into his eyes.

Li Xiaoying looked at Zhao Wen like this, stood up, walked behind Zhao Wen, and gently kneaded Zhao Wen's shoulders.

Hai Lanzhu listened to Zhao Wen's voice, and thought that Zhao Wen's parents had passed away, so he opened his mouth to comfort: "Birth, old age, illness and death are things that people must experience in this lifetime, and these things are better to see the opening point." ”

Zhao Wen twitched his nose, looked at Hai Lanzhu, and frowned, "My parents are still alive." ”

Hai Lanzhu looked embarrassed and stayed there, and after half a moment, Hai Lanzhu said, "Your parents are still alive?" So why don't you take your parents over? ”

Zhao Wen let out a long breath and said helplessly, "I can't pick it up, this is a distance of hundreds of years, I really can't pick it up." Okay, you can eat by yourself, I still have something to do. ”

Zhao Wen gently took Li Xiaoying's hand off his shoulder and then headed outside.

Li Xiaoying and Hai Lanzhu looked at Zhao Wen's departing figure, and for a moment they didn't know what to say.

What did he mean by the hundreds of years of distance he had just said? Do you know? Hai Lanzhu looked at Li Xiaoying and asked.

Li Xiaoying shook her head, "I don't know what this means." ”

"But didn't you know him a long time ago?" How could you not know his origins? Hai Lanzhu asked undeadly.

Li Xiaoying pointed to the sky and said, "Where do I know, since the day I met him, he has never told me about his origins."

As for the distance of hundreds of years just now, I think he should be talking about the distance from here to the sky. ”

Hai Lanzhu looked at Li Xiaoying with a wide mouth and a surprised face, "Heaven? Is this true? Is it not true that the things that circulate in the army are true? Is he really from heaven? ”

"Who knows." Li Xiaoying had two hands and a mysterious face.

After Zhao Wen walked out of the dining room, he adjusted his mentality and went directly to the study.

When Zhao Wen came to the study, Song Yingxing and Sun Yuanhua had been waiting outside the study for a long time.

Zhao Wen looked at the two of them and couldn't help but laugh, "You guys are still coming quite early." ”

"We've just arrived, and we haven't waited long." Song Yingxing replied.

Zhao Wen smiled, and then said to the two people, "Since this is the case, then you should come first." ”

Zhao Wen pushed open the door of the study and took the two of them inside.

Zhao Wen took two chairs for the two of them, and then sat down behind the desk.

Sun Yuanhua and Song Yingxing were also not polite and sat directly in the chair.

Just after sitting down, Song Yingxing couldn't wait to ask, "Lord, you said today that this steam locomotive can be improved, I want to know how adults can improve?" ”

Zhao Wen smiled: "This matter is difficult to say, it is not difficult to say that it is not difficult, today's steam locomotive speed is so slow, what do you think is the biggest problem now?" ”

Sun Yuanhua and Song Yingxing both looked at each other, both of them were confused.

"Please also make it clear to adults." Sun Yuanhua asked respectfully.

Zhao Wen took out a piece of rice paper and charcoal from the side, and quickly drew a sketch of today's steam locomotive on it.

Zhao Wen put down the charcoal pen in his hand and pointed to the wheels of the steam locomotive in the sketch: "The biggest problem with this steam locomotive today is that the wheels and the axles are directly connected."

When I watched it today, I already found this problem. The wheels and the axle are directly connected together, so that there will be a violent friction between the two, and the friction is large, and the speed will naturally not be lifted. ”

"But adults, from ancient times to the present, no matter what kind of vehicle it is, the wheels and axles are directly connected." Sun Yuanhua frowned.

"Yes, it has been connected in this way from ancient times to the present, is it possible that there are other ways besides this method?" Song Yingxing also looked at Zhao Wen with a curious face.

Zhao Wen smiled lightly, and then took out a piece of rice paper again and drew on it.

If there were people from later generations present, they would definitely be able to recognize that this thing painted by Zhao Wen was a bearing.

This drawing painted by Zhao Wen is a rolling bearing of later generations, but the bearing is not a ball but a cylinder, so it is also called a roller bearing.

The reason why Zhao Wen took out this kind of bearing was because the weight of such a thing as a steam locomotive was very large, and the ball bearing was likely to be unable to bear such a large weight.

The roller bearings could withstand it, so Zhao Wen decided to use roller bearings at the junction of the steam locomotive wheels and the axles.

In addition to the roller bearings, Zhao Wen also drew a drawing of a ball bearing.

Although steam locomotives are not available now, lathes such as drill press boring machines can be used.

Since Zhao Wen got the steam engine out, he also got out a simple drilling machine and boring machine, but because Zhao Wen did not use the drilling machine and boring machine at that time, he did not expect to get the bearing.

Zhao Wen put the two bearing sketches in front of Song Yingxing and Sun Yuanhua, pointed to the roller bearing and said to the two people: "This thing is called roller bearing, which can solve the problem I just said." ”

Song Yingxing looked at the roller bearings on the drawings, and his brows were tightly wrinkled together, "Lord, are you sure that this thing can solve the problem just now?" I think this thing you drew is a little too simple. ”

"Yeah, just one little gadget can solve a problem that has existed for thousands of years?" I can't believe it. Sun Yuanhua's face was full of disbelief.

Zhao Wen looked at the two of them like this and smiled lightly, "You don't look at these two things as simple, with the current level of our Xuanzhen, I feel that the standards created are not standard enough."

Especially this ball bearing, you look like a large ring sleeve small ring, between the rings is a small ball, I tell you, it is these small balls, it is estimated that they are enough to choke to make it. ”

"Aren't they just a few little iron beads?" What's so hard about that? Song Yingxing still had a look of disbelief.

Zhao Wen looked at the stubborn Song Yingxing and smiled, "Since you don't believe it, let's wait until the time of manufacturing." ”