Li Mansion, West Courtyard.
Li Zexuan rolled up the drawing, handed it to Yan Shaoning, and said, "Brother Shaoning, I understand your drawing method, but I still think my method is more concise and clear."
"Oh? Then Xiaoxuan, tell me what your drawing method is like."
Yan Shaoning saw that Li Zexuan was very confident in his drawing method, and couldn't help but want to understand the magic of this method.
"What I drew in this picture is a three-dimensional view and an isometric side view of a component. The so-called three-view view is to draw the outline of the object from the front, side and top of the object, such as this stone. Brother Shaoning, you Viewed from the front…”
Li Zexuan picked up a stone as a reference and explained the three-view drawing method to Yan Shaoning. After a while, he packaged the part that the professional teacher had taught him and gave it to Yan Shaoning.
"...Brother Shaoning, you see, with these three views, the craftsman can form a model of the parts to be made in his mind at a glance, and it will be easier to mark the dimensions on the three views."
After listening to Li Zexuan's explanation, Yan Shaoning stood up, walked around, frowned in thought for a moment, and suddenly shouted: "Wonderful, wonderful, this drawing method is so wonderful, Xiaoxuan, you are a genius, you draw like this It does look clearer, with a lot less unnecessary labels.”
Yan Shaoning sat down again, rubbed his hands, stared at Li Zexuan and said excitedly: "I must tell my father about this drawing method and let him popularize it. Xiaoxuan, are you willing to be the supervisor? I If dad knew your talent, he would definitely be willing to get you an official position in front of His Majesty."
Li Zexuan shook his head and said: "Thank you for your kindness, brother Shaoning. I have been away from home for many years and just came back a few days ago. I don't want to be an official yet."
Being a supervisor is almost equivalent to the Chinese Academy of Sciences in his previous life. He is not willing to let Li Zexuan work there every day to do research. Besides, he has been busy with a lot of things of his own recently. The Qiqu Pavilion is about to open, and the locust extermination plan will be launched in two days.
Hearing Li Zexuan's rejection, Yan Shaoning sighed: "Oh, that's such a pity."
Turning his attention to the drawing again, Yan Shaoning asked doubtfully: "Xiaoxuan, what is this isometric view for?"
"This view is mainly to help craftsmen form a three-dimensional model of the object in their minds, because for some objects with particularly complex structures, it is difficult to imagine their three-dimensional model based on only three views."
Yan Shaoning nodded thoughtfully.
At this time, Li Zexuan smiled meaningfully: "Brother Shaoning, you just noticed this drawing method, but you ignored the picture itself."
"Oh? Is there any mystery here? Don't tell me yet, let me take a look."
Yan Shaoning started to look at the drawing again according to the three-view principle that Li Zexuan just explained to him. After reading it, Yan Shaoning stood up, closed his eyes, and imagined the three-dimensional picture of this thing in his mind.
After a while, Yan Shaoning opened his eyes and said excitedly: "I understand what this is, Xiaoxuan, what are you going to do with this thing?" Although he could imagine the three-dimensional model of this thing, he couldn't think of it for the moment. use.
Li Zexuan smiled and said: "I named this thing a ball bearing. Brother Shaoning, do you think what would happen if this thing was used in the transmission connection between the wheel and the wheel axle?"
Yan Shaoning himself has a lot of research on mechanical design. After listening to Li Zexuan's instructions, he immediately understood. At this moment, he was more excited than before.
"It's amazing. This is simply a genius design. With this ball bearing, all vehicles in the future, whether they are carriages or trucks, will experience minimal resistance when moving forward. Xiaoxuan, how did you come up with this? Inventions are so great.”
Li Chengqian didn't understand mechanics and had been silent before. Now seeing Yan Shaoning blowing the thing up to the sky, he couldn't help but wonder: "Shaoning, is this thing really that good?"
Yan Shaoning was extremely excited at the moment. When he heard the prince's question, he affirmed without thinking:
"Of course, it is not an exaggeration to call this thing the most useful invention of our Datang Dynasty. Your Highness, you don't know. If all the cars of our Datang Dynasty use this ball bearing for transmission, then the same horse can be used once Pull at least 50% more loaded vehicles.
At that time, merchants can transport more goods at a time, and during wars, a grain truck can load more grain and grass. In addition to trucks, some other machinery that requires transmission can also use these ball bearings. Your Highness, It doesn’t matter whether this invention is important or not. "
Hearing Yan Shaoning's analysis, Li Chengqian was also shocked. He didn't care whether the merchants could transport more goods, but it could improve the efficiency of the battle formation in transporting food, which was really crucial. In this era, it was one of the decisive factors in the outcome of the war. It’s still a matter of food and grass.
Only then did Li Chengqian realize that Yan Shaoning's previous praise was not excessive at all, and he was also a little excited now.
"Brother Zexuan, this thing is of great importance. I wonder if I can let the orphan take it back to the palace?"
Li Chengqian also knew that Li Tai was competing with him for favor recently, but he had no other good solution. He couldn't act coquettishly in front of Li's second eldest grandson like Li Tai, right? If he dares to do this, he will definitely be reprimanded by Li Er, saying that he does not have the majesty of a country's crown prince.
There are things that Li Tai can do but he can't do because he is the prince. Seeing Li Er becoming more and more doting on Li Tai, Li Chengqian was also anxious, but he could only be anxious.
At this time, seeing that the thing invented by Li Zexuan was so useful and could even be used in the military, the first thing Li Chengqian thought of was that he might be able to use this thing to make Li Er admire him, and by the way, he could also seek some benefits for Li Zexuan.
Li Zexuan was a little helpless at the moment. Although the ball bearings were indeed extremely versatile, these two people weren't so excited, right? Hearing that Li Chengqian meant to present the drawing to Li Er immediately, Li Zexuan said quickly:
"Your Highness, this ball bearing is indeed very useful, but we still don't know if it can be made. I'm afraid it would be too hasty to submit the drawings to Your Majesty now."
When Li Chengqian heard this, he felt it made sense, and secretly said that he was still too reckless.
"What Brother Zexuan said is absolutely true. Then after you and Shaoning build this thing and install it on the car, I will report it to my father. Then I will definitely ask for credit from you two."
As soon as Yan Shaoning heard Li Zexuan's words, he began to frown and think. He was a little too excited just now, and he didn't even think about whether this thing could be made. He thought for a while and hesitated:
"Xiao Xuan, this ball bearing is probably very difficult to make."
When Li Zexuan proposed this ball bearing before, he didn't know whether it could be manufactured with the technology of the Tang Dynasty. Although he was mentally prepared, when he heard Yan Shaoning's negative answer, he still felt a little disappointed in his heart, but he also wanted to Knowing where the technical difficulties lie, I asked:
"Brother Shaoning, I wonder where there might be difficulties?"
…
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(End of chapter)