Chapter 70

Huang Aihua looked at Li Weidong with a look of surprise. Before that, Huang Aihua just regarded Li Weidong as Zhao Guodong's follower, and he didn't even care about it. Huang Aihua didn't even write down Li Weidong's name.

However, Li Weidong was able to accurately name Sakurada Co., Ltd., which surprised Huang Aihua.

At that time, the only foreign brands that the Chinese people could name were Panasonic, Sharp, Sanyo and other home appliance brands, and they were almost ignorant of other foreign brands. A name like Sakurada Co., Ltd. can only be known by experts in the field of machinery and equipment.

This little comrade still understands mechanical equipment? Huang Aihua asked.

This little comrade? Didn't remember my name. Li Weidong complained in his heart.

Then Li Weidong nodded helplessly, and said modestly: I just know a little bit. Generally, the hydraulic failures that often occur are nothing more than vibration and noise, hydraulic shock, hydraulic oil leakage, crawling during operation, valve core. Stuck and overheated.

It seems that this little comrade is an insider! Huang Aihua said.

However, even though Li Weidong was an expert in hydraulics, Huang Aihua didn't take it to heart. There were several mechanical engineers in Yankuang's technical department, all of whom were experts in hydraulics.

Li Weidong went on to say, If I'm not mistaken, the failure of your hydraulic equipment should be the blockage of the oil suction filter, right?

After saying this sentence, Huang Aihua's expression became restless again, and he nodded seriously: It is true that the oil suction filter is clogged.

And the hydraulic cylinder components are ground, right? Li Weidong asked again.

Huang Aihua almost stood up from his seat, he nodded more solemnly: Yes, there is still wear and tear of the hydraulic cylinder components!

The reason for the failure given by Sakurada Co., Ltd. is that the hydraulic piston rod will be corroded by coal particles and the gas in the coal mine during the reciprocating motion of extension and retraction, resulting in the infiltration of pollutants into the matching gap between the piston rod and the guide sleeve. , further accelerated the wear of the hydraulic cylinder components, and caused the paint surface of the hydraulic oil tank to corrode, causing the paint in the oil tank to fall off and block the oil suction filter of the hydraulic pump. Li Weidong said calmly and slowly.

This time, Huang Aihua really couldn't sit still. What Li Weidong said was exactly the same as the cause of the failure given by Sakurada Co., Ltd.

The engineer of Sakurada Co., Ltd. came to this conclusion after researching the damaged hydraulic equipment, and Li Weidong didn't even see the gate of the mining area. On the dining table of the guest house, just based on Huang Aihua's few words, he guessed that the cause of the failure.

No matter how stupid Huang Aihua was, he could see that this young man in his twenties was definitely not an ordinary person.

May I ask this comrade, oh, no, what is the name of this teacher? Huang Aihua stood up and asked cautiously.

His name is Li Weidong, but he is our treasure! Zhao Guodong immediately introduced from the side.

In fact, when we first met, Zhao Guodong had already introduced Li Weidong, but Huang Aihua regarded Li Weidong as a passer-by and didn't care about him at all.

Now, in order to avoid embarrassment, Zhao Guodong once again introduced Li Weidong.

It turned out to be Mr. Li. Huang Aihua nodded with a smile, and then said, Guodong, your freight department is really amazing, you can even go to college students! Yankuang also only has the technical department to assign college students. .

Huang Aihua regarded Li Weidong as a college student. Huang Aihua felt that Li Weidong was so young that only a college student could have such a good understanding of mechanical technology.

Zhao Guodong just laughed and did not deny it. Huang Aihua was praising Li Weidong. If he stood up and denied it, saying that Li Weidong was a junior high school graduate, wouldn't it embarrass both parties, so he would simply acquiesce.

In 1985, college students were the absolute darlings of the heavens. Even a veteran worker with twenty or thirty years of work experience could call a college student Teacher XX.

Li Weidong asked again: Director Huang, Sakurada said that it will help you upgrade the equipment. What is the equipment upgrade plan, can you tell me?

Hey, don't mention it! When it comes to this plan, I get angry! Huang Aihua sighed helplessly, and then said: Sakurada Company didn't tell us how to upgrade the equipment at all, they said it was a commercial secret, It can't be spread out.

If I don't tell you the equipment upgrade plan, how will they upgrade? Li Weidong asked again.

Sakurada will send engineers with tools to help us upgrade on site, and they also put forward a lot of requirements, such as food and accommodation, reimbursement for round-trip travel expenses, and food and drink. The only thing is, when they upgrade the equipment, they are not allowed to watch by our people! Huang Aihua said indignantly.

This is too much! Zhao Guodong took the lead to fight the injustice.

Li Weidong had a calm expression on his face. Such a request seemed normal to Li Weidong. Even at the beginning of the 21st century, when foreigners were invited to repair the shield machine, they would keep the cordon from afar, preventing the Chinese from approaching.

China's technology is backward, and the things it needs cannot be made by itself. If a foreigner gets stuck in the neck, he can only recognize it by pinching his nose. Foreigners also take advantage of China's backward technology weakness to make money from China in other ways.

For example, when selling equipment, add some unnecessary things; for example, if you bully you that you don’t understand, only sell the original version, and then make a fortune in the name of equipment upgrade; for example, leave a back door in the maintenance of equipment, if the equipment fails to be repaired , will pay sky-high maintenance costs.

Obviously, Yankuang was given a routine by this Sakurada Co., Ltd. in this way.

Taking advantage of the wine, Huang Aihua scolded Sakurada Co., Ltd. for its black heart, and Zhao Guodong next to him followed suit. However, the two sang and scolded for a long time, but it was not helpful to solve the problem.

In the end, Li Weidong said: The working environment in the mine is indeed very complicated. Coal particles will indeed cause pollutants to seep into the gap between the piston rod and the guide sleeve. The small particles of coal are still somewhat hard, which will cause wear and tear of hydraulic cylinder components. , but this problem is not difficult to solve, just add a protective cover.

Of course we thought about installing a protective cover. We have a rubber product factory in Yankuang, but the protective cover that can be made is not easy to use. The hydraulic piston rod needs to be retracted back and forth, and coal ash will still enter it after a long time.

Huang Aihua paused, then continued: And the engineer of Sakurada Co., Ltd. also said that the protective sleeve can only protect the hydraulic cylinder components to a limited extent, but the pollutants will eventually enter the hydraulic oil tank, causing the paint in the oil tank to peel off and blockage. Suction filters for hydraulic pumps. Our engineers also experimented with this, and it does.”

Hehehe... Li Weidong laughed after hearing this.

Hey! Teacher Li, what are you laughing at? You think I'm wrong? But our own engineers can't be wrong! Huang Aihua said dissatisfiedly.

Director Huang, you have been tricked by Sakurada Co., Ltd.! Li Weidong said.