King of Industry

In the conference room, when Zhao Guoyang talked about the synchronous motor drive hoist, Ji Chongxuan's eyes were fixed.

When this German hoist came out, Ji Chongxuan was entrusted by the state with the special task of developing the electrical control system of this synchronous motor drive hoist.

It's a pity that Ji Chongxuan and his research team can only return home after two years of hard research without the core data of the original electronic control system samples.

This matter has always been a lingering shadow in Ji Chongxuan's heart.

At this time, when Zhao Guoyang mentioned the world's first electromechanical integrated hoist again, the sadness in Ji Lao's heart surged up in an instant.

Zhao Guoyang didn't know what Ji Chongxuan was thinking at this moment, and after a slight pause, he continued to talk.

"The advent of the electromechanical integrated hoist has led to the rapid development of hoisting machinery and electrical transmission technology. At the same time, the development of electronic technology and computer technology has made the electrical control system of the hoist more rapid..."

When Zhao Guoyang mentioned this, Chen Li raised her hand and asked, "Mr. Zhao, didn't our country start to gradually apply the electrical control system to heavy machinery in the late 1980s?"

"According to what you said, it seems that in the early 1980s, foreign countries already had related technologies. Is this possible?"

Chen Li's words resonated with Xu Linlin and Kong Dezhong.

When Ji Chongxuan gave them a lecture before, he gave a detailed introduction to the application of domestic electrical control systems.

However, Mr. Ji did not talk too much about the status and development status of this technology abroad.

The reason is simple. After all, the three of them are still in the initial stage of electromechanical theory. If they are instilled with Western technical theories too early, it may backfire.

Therefore, when giving lectures, Ji Chongxuan deliberately avoided this field of foreign electronic control technology.

At this moment when Chen Li asked such a question, Zhao Guoyang made a little calculation in his mind, and understood the good intentions of Mr. Ji in educating the three of them.

However, now that they have started to get involved in the real product development, Zhao Guoyang feels that there is no need to avoid some taboos before.

So Zhao Guoyang looked at Ji Chongxuan with a questioning gaze.

When he saw Ji Lao slightly nodding his head with an encouraging look, he immediately made a decision.

Turning his head to face Chen Li, he explained word by word: "Student Chen Li, regarding the development status of electronic control technology in the world, there have not been many reports in our country, so that everyone has misunderstood this aspect. "

"In fact, as early as the mid-1970s, foreign countries had already applied programmable logic controllers (PLC) to the control of elevators. The representative in this regard is still Siemens, so let's not mention it."

"In the early 1980s, computers were widely used in the monitoring and management of elevators. After combining computer and PLC technology, the automation level, safety and reliability of elevators have reached a new height. "

"And, the application of these two technologies has provided people with brand-new means of modern management and monitoring."

After a pause for a few seconds, Zhao Guoyang continued to narrate: "Another point I want to mention is that during this period, some large hoist manufacturers, such as Siemens, ABBA, and ALSTHOM, made full use of new technologies and equipment. , developed and perfected the safety protection and monitoring device of the hoist."

"It can be said that the application of several technologies in the early 1980s has made the technical level of the hoist advance by leaps and bounds..."

After Zhao Guoyang's narration, the members of the technical department of "SMS Company" who were present at the meeting all showed expressions of astonishment.

As they have been engaged in mining machinery and equipment for more than ten years, their understanding of the development process of mine hoists is far inferior to that of the chairman in front of them.

Such a fact made the guy feel ashamed, but at the same time, he admired Zhao Guoyang's knowledge performance.

An engineer from the technical department couldn't help asking his companions in a low voice: "Old Lu, what is the background of our Mr. Zhao? His understanding of lifting machinery is probably as good as that of a university lecturer, right? "

"It's not just a university lecturer. I think even if a professor is here, it may not mean that our chairman knows much."

An older technician beside him said in a serious manner: "The most important thing is, look at the calm look on our chairman's face, as if what he just said is just superficial. Such confident eyes , It’s really amazing!”

While the technicians in the audience were discussing, Zhao Siyan, who was sitting next to Zhao Guoyang, looked at this peer with admiration.

Zhao Siyan had learned about Zhao Guoyang's extraordinaryness very early on.

Whether it was at the SJ International Auto Show or the technical seminar established by Jinling Automobile Group, Zhao Siyan had witnessed Zhao Guoyang's amazing performance with her own eyes.

However, in those two times, I was just a bystander after all, not a participant. Apart from being amazed by Zhao Guoyang's performance, I didn't have much sense of being in the situation.

But this time, the situation is completely different.

This "mine hoist" project has been spent for a long time, collecting information, and carefully preparing.

Zhao Siyan believes that even Li Zhaohe, the vice president of technology, may not necessarily surpass her in understanding of "mine hoists".

Just when Zhao Siyan secretly felt that she might really be able to help Zhao Guoyang this time and be on her own, Zhao Guoyang's casual explanation made her "knocked out of the dust" again.

Of course, Zhao Siyan didn't intend to compete with Zhao Guoyang for superiority.

Her only hope is to show her ability as much as possible in front of the other party, so as not to be left too far behind by the other party.

Unfortunately, after seeing the current situation, Zhao Siyan could only say to herself in the depths of her heart: Zhao Siyan, it seems that you have to continue to work hard. It's really not that easy to catch up with Guoyang!

When the voices of the people in the audience gradually subsided, Zhao Guoyang continued to speak: "Just now, I gave you a general introduction to the development of mine hoists in the world. Next, let's talk about the domestic situation." .”

"I have already said it when I was talking to you just now. From the mid-1970s to the early 1980s, it was the golden age of rapid development of hoist technologies. Many new technologies were applied to actual operations. middle."

"However, when foreign science and technology are advancing by leaps and bounds and ushering in rapid development, the development of domestic elevators, especially the research and development of electronic control systems, has been extremely backward for a long time!"

As soon as Zhao Guoyang finished speaking, the muscles on Ji Chongxuan's face trembled slightly.

This time, Zhao Guoyang happened to catch a glimpse of this scene, and somehow understood something in his heart.

Zhao Guoyang was already very clear about the backwardness of domestic technology in heavy machinery such as hoists and excavators, even before his rebirth.

Speaking of it, this backward situation has nothing to do with the knowledge of those domestic experts and scholars at that time.

The main reason is that our country's industrial foundation is too poor and the starting point is too low.

Just like the patent of "DC all-digital new electronic control system", no one in China may have thought of it before.

However, when they really studied in depth, they were caught by "blockers" one by one.

Such problems as the rated power of the DC motor cannot be reached, the maximum input speed is not enough, and the speed regulation performance cannot reach a stable state, etc., all restrict the imagination and creativity of domestic technicians.

In Zhao Guoyang's view, the reason why the domestic technology giants cannot quickly reverse this situation is really just a "crime other than war".

Feelings are emotions, but Zhao Guoyang still has to continue to say some words.

He let out a breath, and then said: "According to what I have learned, so far, most of the electric control systems of mine hoists in service in our country are AC regulators with metal resistors in the rotor circuit. speed system."

"This kind of system equipment is outdated and the technology is backward, which is far behind the development of the times..."

"And the technical backwardness of the electronic control system also makes the safety and reliability of our domestic hoists far behind the international advanced level."

Zhao Guoyang sighed, and then said: "Most of our domestically produced mine hoists lack effective speed monitoring devices in the key parts and the deceleration sections of the upper and lower wellheads, which can easily cause some unexpected accidents."

"So just in terms of hoist control technology, we are more than a star and a half behind foreign countries."

Speaking of this, Zhao Guoyang may feel that what he said is too negative, so he changed the subject: "Of course, you don't have to be too discouraged. After all, the level of mine hoists in our country has been improving."

"In the mid-1980s, our country introduced more than 20 sets of thyristor-DC motor control systems from Sweden, Germany and other countries."

"Although it is imported with original packaging and then installed on our own products, it can be regarded as filling the gap in the DC electric control of domestic hoists."

"As for the purely domestic 'DC electric control system', it hasn't come out yet. Perhaps, this product from our SMS company will be the first purely domestic product in the strict sense..."

Zhao Guoyang's last sentence was somewhat modest.

In fact, after his patent of "DC all-digital new electronic control system" was approved, it is impossible for any individual or enterprise in China to surpass SMS in this respect.

After Zhao Guoyang finished speaking, he turned his attention to Xu Linlin who asked the question.

He smiled and said: "Student Xu, basically the development status of mine hoists in our country is like this. Do you have any questions?"