Siheyuan: Starting from a fitter

Chapter 51 Secret Mission ([-])

"Everyone, please follow me."

Wang Peiyi led everyone to a workshop, and all the windows were closed with curtains.There is a large workbench in the middle, enough for 10 people to work around. There is a motor-like device placed on the workbench. It is 0.5 meters high and more than 1 meter long. There are some parts next to it, facing the workbench. Four high-wattage electric lamps are hung from it, and there are six floor lamps next to the workbench. At this time, the all-round illumination without blind spots makes the table's every detail visible and extremely bright.

Standing next to him was a middle-aged man wearing a four-pocket tunic and dark glasses.

"This is Comrade Zhao Gang from the **** laboratory," Wang Peiyi introduced, and then introduced the others.

"This is Comrade Du Baobao from the *** factory."

"This is Comrade Liu Zhe from the First Machine Tool Factory."

"This is Comrade Ma Yimin from the Precision Instrument Factory."

"This is Comrade Ma Tong from the *** factory."

"This is Comrade Zhao Haiyang from the **** factory."

"This is Comrade Wei Haibin from the **** factory."

"This is Comrade Li Guocheng from the rolling mill."

After everyone shook hands with each other and said hello, when he saw Li Guocheng, Zhao Gang was stunned for a moment, and then didn't say anything. He was obviously very well-educated.

"This is a motor. As for the source, I guess you don't want to know. Anyway, it is precise and has low noise. When we first got this motor, we tested it in a special laboratory and found that the noise was only 30 decibels. However, after disassembly and mapping, it was installed again. It was found that the noise exceeded 65 decibels. Through experiments and analysis, experts found that it should be caused by assembly, so today I invite you to try it and come up with an assembly plan that can reduce the noise," said Comrade Zhao Gang.

Everyone gathered around and marveled at the motor. After understanding all the components, they began to study the mapping drawings.Li Guocheng also observed carefully. Based on the structural characteristics, he found that this was a DC motor with a brushed 16-armature. The structure was relatively simple. However, he found that the air gap of this motor was less than 1 mm, which is much smaller than the air gap of current common motors.

"The structure of this motor is the same as that of a conventional motor, except that the size is larger. We have re-measured and mapped the coils of the stator and rotor. Everyone has just heard the results. I also ask all the masters to help find the reason." Zhao Gang came over Explain to.

Everyone looked at each other in shock after reading the drawings.

"This is a standard motor. The stator did not move during the mapping. Now it is mainly the rotor, the main body of the rotor, one upper and lower bearing, brushes, upper and lower cover plates. It is a very standard structure, very simple and clear at a glance." Comrade Liu Zhe said doubtfully.

"Yes, I don't see any problem," Comrade Ma Yimin said.

"The only special thing is that the air gap is smaller, which does not affect the assembly," said Comrade Zhao Haibing.

"At present, there are no problems with various indicators. Let's start the installation and take a look," Du Gong concluded.

"Agreed," everyone agreed.

Then Du Gong is the main one, supplemented by others. Of course, Li Guocheng is the youngest here and acts as a labor exporter.

During the installation process, Li Guocheng conducted three-dimensional modeling of all components and found no problems.After everyone worked together to complete the assembly, as soon as the power was turned on, there was no need to measure the equipment. Just look at the vibration of the motor and find that something was wrong.

Everyone started to disassemble again, while disassembling, observing, and discussing, and when it became a part again, everyone stared wide-eyed.But everyone is an assembly master in each factory or institution. They don't talk about it, but they all have their own pride.

So next, Li Guocheng was the most tiring one. Each master personally took the lead in the installation. Some effects were improved, some were worse, and overall it was not obvious. Everyone was lost in thinking.

"Xiao Li, you should try it too," Du Gong reminded him when he saw that everyone had tried it but Li Guocheng had not.

During the assembly process, Li Guocheng actually knew the answer through modeling observation and hands-on experience. That is, because this motor is too large, it requires very strict dynamic balance. These masters did not seem to be aware of it. During the respective assembly processes, they only paid attention to whether each component was installed in place and met the requirements of surveying and mapping. They did not pay attention to the whole, and did not see the deformation of some parts of the stator coil.

"Master Du, all masters, we are all masters, so I will not show my shame." Before everyone could finish speaking, most people showed disdain, and some even cursed in a low voice.

Looking at everyone's performance, Li Guocheng was not prepared to save face for everyone.

"However, I don't know if you have noticed that due to repeated installation and disassembly, there is a slight looseness between the bearing and the stator. This is not the point. Look here," Li Guocheng said, pointing to a coil on the stator.

"Please see, the coil here is slightly deformed and collapsed slightly..."

Before Li Guocheng could finish speaking, Wei Haibin interrupted Li Guocheng's words rudely: "You little brat knows a lot about it. This deformation and overall, it has an impact. If you don't know how to pretend to understand, if you can, just do it." Let’s take a look at the assembly and the overpass handle. All talk without practice will annoy you the most. How dare you come to make up for such an important task.” It may be that a solution has not been found, so Wei Haibin found Li Guocheng to vent his frustration. .

"Gong Wei, the old man said that without investigation, you have no right to speak. It's too arbitrary for you to draw conclusions without even listening to my opinions." Li Guocheng was also a little angry. During the assembly process, it was only this Wei Gong who had many problems. , either he disliked Li Guocheng for taking it too high, or he took it crookedly, and Li Guocheng had tolerated him for a long time.

"You daddy, what else have you done during the whole process besides your strength?" Wei Haibin said with a dirty word.

"Wei Gong, please control your emotions." Wang Peiyi intervened at the right time.

"Go on," Wang Peiyi said to Li Guocheng. In fact, he was also a little disappointed. There are so many old fitters, and none of them are useful. The idea of ​​​​trying it out, if it can be done.

"I will continue to say, here, here, and here, the coils in these parts are deformed to varying degrees. Because the rotor is large and heavy, these tiny deformations will destroy the original dynamic balance of the stator and the motor. Jitter will occur during high-speed operation, especially for such a large motor. A tiny imbalance will cause large vibrations, not to mention so many visible deformations." Li Guocheng talked eloquently, note Noticing the confused expressions of the people next to me, I deliberately ignored him and finished my sentence.

"Don't use these words to fool us. If you have the ability, you can assemble it and see the results." Wei Haibin was still unconvinced.

"Sorry, it can't be assembled..." Li Guocheng was interrupted by Wei Haibin before he finished speaking.

"Look, I'll just say it. I don't have a hair in my mouth, I don't work hard, I only know how to talk on paper." Wei Haibin shouted happily. Others watched the fun with their own thoughts. Wang Peiyi and Du Gong didn't say anything anymore.

"Wei Gong, please don't interrupt my speech all the time, it's impolite." Li Guocheng no longer wanted to give him face.

Seeing that Wei Haibin was about to speak again, Wang Peiyi directly stopped him and said: "Listen to Xiao Li, maybe the problem will be solved."

Wei Haibin reluctantly closed his mouth, but the viciousness in his eyes showed that the gap was formed. Li Guocheng felt confused, this person must be a madman.

In fact, Wei Haibin is now in a critical period. He originally wanted to use this opportunity to advance to a higher level, but he didn't expect to be humiliated by an unknown young man. He never thought that these are all self-inflicted.

Then Li Guocheng gave everyone a lesson about dynamic balancing, and everyone was stunned. During this period, Zhao Gang and Du Gong asked the most questions. In addition to Wei Haibin, others also asked a few questions. Everyone was Like a primary school student, he took out a pen and paper to record.They are all smart people, and there is nothing shameful. Wei Haibin is also secretly recording it.

"Listening to your words is worth ten years of studying." Zhao Gang no longer treats Li Guocheng as a young man, but as a peer.

"Okay, lunch time has passed. Let's eat first and then fight in the afternoon." Although Wang Peiyi didn't understand much, but looking at the performance of others, he felt that this was a reliable matter and saw hope of solving the problem.

Then everyone left the workroom talking to each other.

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(End of this chapter)