Chapter 220 He is the road sign!

Author: September Sauce

Chapter 220 He is the road sign!

Chen Nian made an appointment with Wang Jiancheng to meet in the discussion area of ​​the library. When he arrived, he found that Wang Jiancheng was already discussing with Qiu Mai.

He did not go over to disturb them, but stood quietly behind them, listening to their discussion.

".So the most important thing about the excavator he wants is its all-terrain capability, and at the same time, the size should not be too large."

"We must ensure that it still maintains basic functional integrity, safety and reliability within an extremely narrow operating range, while also taking into account efficiency."

"This is not a simple requirement. No wonder it is not available in China now."

"Look at the sketch I drew, to achieve the functionality he mentioned, it's impossible to just modify the chassis like you said."

"The entire machine needs to be re-arranged, including the cab, engine compartment, transmission device, etc."

"The core technical difficulties are not only hydraulics and transmission, but also system engineering design."

The speaker was Qiu Mai. She had a sketch drawn with pencil in her hand. Chen Nian glanced at it and found that the sketch was very similar to the all-terrain excavators he had seen in later generations.

Of course, there is an essential difference between "concept drawings" and "drawings". It does not mean that something can be built with a simple drawing.

But even so, Qiu Mai has fully demonstrated her strength.

Just like when I drew the blueprint of the F-22.

Wang Jiancheng, who was sitting next to Qiu Mai, looked at the drawings and said:

"What you said is right, but there should be a way to solve it, right?"

"For example, the hydraulic system problem you mentioned, in fact, the complexity of the design of the hydraulic system of the all-terrain engine has not increased much."

“It’s gone up a lot!”

Qiu Mai interrupted him decisively, and then explained:

"You think it hasn't risen much, that's because I didn't mark the hydraulic device required for the positioning system."

"To put it bluntly, if you want to use this excavator in the mountains, how can you make it firmly nailed to the rock wall? The problem is to nail it to the mountain road."

"Is it possible that you have to build a rope and have people manually pound the positioning stakes in every time you move?"

"So, fixing the system is important."

"According to the current general design, we either use positioning piles or hook-type positioning modules. No matter which one is used, a huge amount of hydraulic system design is involved."

"Even each bending joint requires a separate set of hydraulic equipment. The operating logic and performance requirements of each set of equipment are different. How can it be that simple?"

After hearing Qiu Mai's words, Wang Jiancheng sighed slightly disappointedly.

Then, he turned his attention to another keyword marked on the paper, transmission system.

"What about the transmission system? Is this difficult?"

".I don't know how to put it. If we have high requirements, we need to use high-power AC servo motors and apply them to hydraulic presses."

"The purpose of this is to replace the structure of ordinary induction asynchronous motors, simplify the hydraulic system structure of the hydraulic press, save energy and improve performance."

"This is the basis for the miniaturization of this all-terrain excavator."

"Of course, we can also maintain the original asynchronous motor design, but in that case, we must start from other aspects to reduce the size of the entire excavator."

"You just said that our goal is to reduce the size to less than 4X4. This is a mini excavator, so it is difficult anyway."

"It's not necessary to reduce the volume that much. The main thing I consider is the small construction area. If there are other ways to overcome this problem, then the volume is not uncompromising."

"Isn't the problem just that there is no other way?"

Chen Nian listened to their discussion with interest and secretly sighed:

Sure enough, the world of top academics is different from that of most ordinary people.

Although the two people in front of me are related in background to a certain extent, none of them have serious experience with excavators.

Just relying on this limited information, we can actually draw so many conclusions that can be said to be completely correct. It is really amazing.

However, it is still a bit too whimsical for the two of them to design the required all-terrain excavator.

You have to do it yourself!

Chen Nian patted Wang Jiancheng on the shoulder. The latter looked back and immediately gave up his seat, gesturing for Chen Nian to sit down.

"Senior, we haven't discussed it for long, do you want me to tell you what I said before?"

Chen Nian shook his head and replied:

"No need, I just listened for a while and I basically understand it."

"So now, the difficulties you have sorted out are mainly concentrated in the three parts of positioning system, hydraulic and transmission, and electronic control, right?"

Qiu Mai nodded, rubbing his head and said:

"To be honest, we are trying our best to discuss this now, but it is still very difficult to achieve any results."

"After all, we can't solve the servo motor problem."

"What if it can be done?"

Chen Nian asked.

"Ah? Can it be done? How?"

Qiu Mai subconsciously repeated Chen Nian's words, with some doubt in his tone.

".I'm just giving you an example. Have you ever thought about solving this problem yourself?"

Chen Nian looked at Qiu Mai with some expectation.

In fact, from his point of view, for Qiu Mai to participate in the main work of the Yishan project, but can only be a marginal handyman, it is better to be fully responsible for the design of a small equipment as he is now.

Although it may not be that amazing in terms of scale, nor is it so conspicuous in terms of personal resume, it is definitely not worse than participating in the main work, whether it is the training of one's own abilities or the "meaning" of the project itself.

Qiu Mai obviously knew this too.

So he wanted to know what Qiu Mai would choose.

After hesitating for a moment, Qiu Mai answered:

"I want to solve it, but the problem is, I don't know if I'm capable enough."

"My main worry is that if I really start this project, if there is no result in the end, won't I let other people's hopes be dashed?"

"After all, this is not a scientific research project, this is a."

"Firefighting Project."

Chen Nian added.

"That's right, it's a fire-fighting project. I'm afraid we don't have enough capabilities to put out the fire."

"Try it."

Chen Nian couldn't help but come to a conclusion. Then, he took the sketch drawn by Qiu Mai and said:

"Then let's start from the most basic part, let's talk about the power system first."

In the next few hours, Qiu Mai felt as if he had entered a new realm.

She never imagined that the research and development and design process could be so simple.

In most cases, Chen Nian has already given key tips as soon as a question is raised, and then uses his existing knowledge to quickly improve it.

Wang Jiancheng on the side was not idle either. While summarizing and recording the discussion between the two, he also made several corrective suggestions from time to time to eliminate any contradictions or conflicts in the design he proposed one by one.

Under such a division of labor, the efficiency of discussions is astonishingly high.

Even before the library closed, they had solved problems with two major systems in the excavator.

——

Of course, the way to solve the problem does not mean that it is actually built, or that there are drawings and can be put into production, but that the correct, standard and absolutely usable ideas are established.

Even if there are corrections later, the magnitude will not be too big!

Is this really the correct way to open a project?

She could clearly feel that if she were a driver, every previous project would have been in the dark on a winding mountain road where she could not see her fingers.

My limited knowledge system is like the car lights that guide the way. Even if there are any, they can only illuminate a narrow area in front of me.

But Chen Nian's presence is like the reflective road signs on both sides of the highway, directly outlining the entire road.

——

And more importantly, the light reflected by the road sign is not the light emitted by it itself, but comes from the headlights of your own "car".

In other words, Chen Nian has never once guided in a way that transcends his own knowledge system.

What kind of monster is this?

Even with my mentor, I have never had such an experience.
To be continued...