King of Industry

In the conference room, after Zhao Guoyang answered Tang Wanru's question concisely and clearly, there was a commotion among the technicians at the SMS company.

These people had never seen Zhao Guoyang's ability before.

Everyone thought that Mr. Zhao was nothing more than a rich second generation, and that he only knew a little bit about technology at best.

Who knew that after listening to Mr. Zhao's narration just now, he is obviously a knowledgeable person.

Zhao Guoyang didn't know what everyone thought about his bosom. He said with a smile: Okay, student Wanru, the problem with the 'axis' should be solved, right? Do you have any other questions?

Tang Wanru let out an ah and shook her head repeatedly.

Zhao Guoyang nodded, and turned his gaze to the technicians of his company.

If you have any questions, please speak freely. Especially the 'mine hoist' we purchased, if you don't understand anything about the structure or principle, you can also bring it up for discussion!

After everyone exchanged glances, a technician in his forties raised his hand and said, Mr. Zhao, I would like to ask, why doesn't the 'mine hoist' that our factory is about to develop use friction? What about the principle of winding? How is it different from the winding principle?

After the technician asked this question, everyone's eyes showed hope.

Seeing everyone's expressions, Zhao Guoyang nodded slightly, then raised his arms, and began to talk calmly.

Before answering this question, let me ask you one thing first, that is the working principle of the winding hoist. After dismantling the mine hoist we bought, you should know it?

Yes, Mr. Zhao, we all know this.

That's right, the winding type is to wind the steel wire on the drum and then lift it up!

Hearing the chatter of the technicians below, Zhao Guoyang nodded and said: Well, since everyone already understands the working principle of the winding hoist, the working principle of the friction hoist is much simpler to explain. gone.

As everyone knows, the hoisting wire rope of the friction hoist is different from the winding hoist.

They are not wound on the drum, but rely on the friction between the wire rope and the liner on the capstan wheel, so that the hoisting wire rope and the capstan wheel move together, and drive the lifting container suspended at the end of the wire rope to move up or down. .”

The hoisting system of the friction hoist, in order to improve the operation effect, keeps the tension difference of the hoisting wire ropes on both sides basically unchanged during the operation process. Usually, a balance tail rope is suspended at the point of hoisting the container.

When the hoist is moving, the self-weight of the hoisting wire rope and the weight of the suspended hoisting container are pressed against the friction lining with a certain tension, and the resulting friction makes the wire rope and the hoisting container go up or down with the rotation of the capstan.

Zhao Guoyang breathed a sigh of relief and continued: Basically, the working principle of the friction hoist is like this. It is generally suitable for deep wells, and the multi-rope friction hoist is more suitable for the needs of large-scale mine hoisting.

As for the winding hoist, it is suitable for shallow wells and inclined wells, and it can adapt to the work needs of multi-level double-groove lifting. It should be said that in terms of application, the winding hoist is wider than the friction hoist.

After Zhao Guoyang finished speaking, he picked up the teacup on the table and took two sips of water to moisten his throat.

As for the choice of friction hoist and winding hoist, Zhao Guoyang had actually struggled before.

With his attainments in construction machinery, it is not impossible for him to work on friction hoists if he really settles down.

But in that case, it will take too long, and it is difficult to say what effect the final product will have.

After all, for some basic parts, domestic manufacturers cannot meet the high-level demand for hoists.

So after careful consideration, Zhao Guoyang decided to start with something simple.

With the research and development experience of the winding hoist, the company will be much calmer when it enters the friction multi-rope hoist in the future.

Seeing Zhao Guoyang drinking water and resting, Li Zhaohe said in a timely manner: Okay, Mr. Zhao has explained the characteristics and working principles of these two elevators to everyone.

If you don't understand anything, you can come to me after the meeting to discuss it.

Now, do you have any other questions? If not, let's move on to the next topic and discuss the division of labor after the project is approved...

For the technicians of SMS Company, the biggest difficulty has been solved before developing this mine hoist, and naturally there will be no other problems.

Seeing that there were no more questions raised, Li Zhaohe was ready to speak.

At this moment, a thin male student sitting next to Ji Chongxuan raised his hand tremblingly.

Uh... Li Zhaohe swallowed the words that came to his lips.

But considering that the other party is not from his own factory and it is not easy to get angry, he can only force a smile and say: Student, if you have any questions, please speak up.

This thin male student is naturally Professor Ji Chongxuan's student Xu Linlin.

Compared with Kong Dezhong, who is five big and three thick, and Chen Li, who is flying and jumping, Xu Linlin should be regarded as the one with the most outstanding ability among the three students brought by Ji Chongxuan.

This point, after the six students got along with each other for a period of time, everyone basically knew it well.

Seeing him raise his hand to speak at this time, not only Kong Dezhong and Chen Li, but also Yuan Qinghua, Liu Yan, and Tang Wanru all shot doubtful looks at Xu Linlin.

Xu Linlin stood up first, bowed to the audience, and then spoke out his question in a precise manner.

Mr. Zhao, we have also done some serious research on the structure and working principle of the mine hoist.

However, we are still a little unfamiliar with the current development of this kind of construction machinery in China, especially in the world. I hope you can give us a detailed answer.

In addition, Mr. Zhao, Mr. Zhao, has already told us about the patent of 'DC all-digital new electronic control system' invented by you.

My other question is, how does your electronic control system compare to the international advanced level...

Hearing the words of this skinny student, there was a burst of exclamation in the conference room.

The technicians of SMS Company lamented that the young student's problem was too difficult, which simply regarded Mr. Zhao as an expert and scholar in mine hoist.

What Yuan Qinghua, Liu Yan and the others lamented was that Xu Linlin's question was right on point.

Yes, in the first meeting before, Zhao Guoyang roughly talked about the gap between the domestic mine hoist and the world's advanced products, but he didn't elaborate on where the gap is.

Under such circumstances, when Xu Linlin asked this question, it had the meaning of breaking the casserole and asking the end.

After Xu Linlin asked this question, everyone's eyes naturally focused on Zhao Guoyang again.

Everyone is more or less suspicious of this Mr. Zhao, and it is estimated that he may not be able to answer such a professional question.

Among them, only Ji Chongxuan looked at Zhao Guoyang with the most special eyes.

There was no worry in the big man's eyes, only anticipation and appreciation.

Putting down the teacup, Zhao Guoyang signaled to Xu Linlin who was still standing there, asking him to sit down first.

Then, Zhao Guoyang turned his attention to everyone, and said with a slight smile: Student Xu's question is very good.

Since we want to develop the product 'Mine Hoist', we must first clarify its current state-of-the-art technology, so that we can have a catch-up target.

Let's talk about the domestic situation first!

Zhao Guoyang reached out his hand to gesture to Li Zhaohe who was beside him, and said to everyone: At present, the highest level of mine hoists in China should be the Southwest Mining Machinery Equipment Factory.

The hoist that Mr. Li purchased for everyone for dismantling is from this factory.

With regard to the technical level of the domestic mine hoist, everyone should have some understanding during the dismantling process, so I won't say more. Next, I will talk to you about the development and research status of the mine hoist in the world...

When Zhao Guoyang said this, all the members in the meeting held their breaths and stared at him intently.

Zhao Guoyang didn't hold back, he waved his arm and talked eloquently: From the beginning of the 1960s to the present more than 30 years, the technical level of mine hoists in the world has improved by leaps and bounds.

During this period, both the mechanical part and the electrical part of the hoist have developed rapidly. The more critical point is that the development of the two is mutually promoted and improved, showing a complementary development trend.

At the beginning, the mine hoist was just a simple system of electric motors driving the reel through a reducer. Later, DC slow-speed motors gradually appeared, and hoists with direct-rotation mounted on the cantilever of the DC motor.

In the 1970s, after the world-renowned Siemens company invented the AC-DC-AC frequency conversion principle of vector control, it also marked the official arrival of the technical era of synchronous motors replacing DC motors to achieve speed regulation.

In the early 1980s, the world's first hoist driven by a synchronous machine cantilever came out in the German Monopol mine; a few years later, the electromechanical integrated hoist co-operated by Mavghh and Siemens was born in the German Romberg mine.

This is also the world's first mechanical and electrical integration, synchronous motor drive hoist...