C156 Initial Research on Electrical Damage

Zhao Cheng walked quickly to the workshop, and when he came to the workshop, Li Ying brought a device with him and said to Zhao Cheng, "Teacher Zhao, in order to reduce this destructive vibration, We installed an air tank reinforcement bracket and added the frame of the auxiliary compressor. After the implementation intensified, The vibration level was obviously lowered, and the air pipe did not crack again. However, After reinforcing, the electric generators installed with the two sides malfunctioned again. Failure indicates that the earlier investigation results might not be entirely the cause of the generator's power loss"

Zhao Cheng looked at the installation device that Li Ying told him and frowned. " This method, can't completely solve the problem of the electric generators being burned? "

[Part of the data is referenced to CRH1 Type Analyzing and solving the cause of compressor damage by the train group. Shanghai railway station Shanghai railway station Shanghai train. ]

"Yes, Teacher Zhao, it can only be improved for a short period of time. We still need to think of a way. " Li Ying said disappointedly.

"Don't worry. Let's have a meeting and see what we can do. " Zhao Cheng instructed, "Call all the engineers on duty here. "

"Okay, Teacher Zhao. "

In the meeting room, Zhao Cheng looked at the documents in his hands and said to every engineer present, "In order to confirm the effectiveness of correcting measures and find out the other fundamental reasons, systematically analyze the factors that affect the life span of the generator. We suggest that everyone give an analysis plan and test it out. "

"Teacher Zhao, I think the reason this time might be because of the vibration. "

"The vibration?" Zhao Cheng looked at the engineer, Zhou.

"Yes, Teacher Zhao. The vehicle's sensors detected the acceleration of the vehicle. Based on the data, it could be seen that after the installation of the vehicle was adjusted, the vibration would not cause any damage to the generator. However, it will lower the efficiency of work" Little Zhou's words caused Zhao Cheng to fall into deep thought.

"Yes, Teacher Zhao, we can also feel that although the vibration won't destroy the clicks, it will still reduce the efficiency of the work. Therefore, this isn't a good way to modify it. " Li Ying also agreed.

"Is there any other way?" Zhao Cheng wanted to know the source.

"According to the analysis of the data recorder of the regular train, the auxiliary wind supply unit in the experiment is supplying abnormal wind pressure. Perhaps. . . It's because the generator works for too long, I suggest to reduce the generator's working time. " Engineer Little Wang said.

"Lowering the generator's working time?" Zhao Cheng thought about this possibility.

"Also, according to the 25-liter U02 charging rate of the U02 charging rate for the 25-liter voltage, it should be between 90-120 seconds. However, according to technical guidelines, the pressure should reach 7. 35 Ba in 20. 30 seconds. Instead of rising slowly. Once the pressure is cut off, there is no need to turn off the compressor. The pressure regulator would open the exhaust valve. When the pressure fell to about 4. 5 Ba, the exhaust valve would close. The pressure will rise to 7. 35 Ba. " Engineer Zhuo said.

"This process will repeat itself. During the entire measurement process of the train, until the maximum working time is 10 minutes. Only then did the compressor close. These two conditions caused the generator to suffer from excessive stress that it should not have. The regulation also required the user to work for 10 minutes before the temperature of the generator dropped to the environmental temperature. The compressor can't be restarted " Engineer Lil 'Wang tried to help.

"This means. . . We need to make a modifying device on the time when the pressure is cut off to reduce the chance of failure of the generator. Right? " Zhao Cheng thought about this possibility.

"Teacher, perhaps we have other ways, such as. . . " Li Ying gave another possibility, "After reinforcing the auxiliary wind supply unit frame, the limit of the power generator's ten minutes working and the malfunction of the two-way stop valve will be due to these damaged power generators being more likely to be damaged during work. "

"This is a good idea, why don't we try. . . " Zhao Cheng nodded.

"Okay, Teacher Zhao, let's go and test it out. " Li Ying nodded and led his colleagues to the workshop.

At this moment, Zhang Hong, Su Jianguo, and Cheng Jianjun arrived at Professor Huang's office.

Professor Huang stood up and stretched out his hand, "Long time no see, Old Zhang. "

"Long time no see, Old Huang. " Zhang Hong shook Professor Huang's hand.

Su Jianguo and Cheng Jianjun looked at each other and greeted Professor Huang.

Professor Huang smiled and sat down. He looked at Zhang Hong and said, "This disciple of mine has left for a few years and has become mature with you. He even became your son-in-law. He really knows how to pry. "

"What is the matter? Are you jealous?" Zhang Hong proudly asked.

"How would I dare. . . I am only jealous. In other words. . . Old Zhang, this time you have brought along a troublesome problem, right?" Professor Huang had already learned about the train and generator from Zhao Cheng.

"Yes, it's a technical problem of the power generator being burned down. Huang, do you have a solution?" Zhang Hong asked.

" This solution, Wait a minute, I'll look for the thesis, It just so happens that I'm having this discussion. " Professor Huang opened his database and chose the relevant information.

After looking for a while, Professor Huang raised his head. He looked at the few people in front of him and slowly said, "The main reason for the electrical damage is because of the high vibration level. The electric generator suffered from the high vibration impact during work. Some of the electrical brushes might be damaged in advance. First, they should check whether the electrical wiring and the air dryer pressure switch's signal was correct. Flan should be installed between the two-way stop valve and the installation base board. It could reduce the function of the two-way stop valve and could be used as a single valve to prevent compressed air from entering the main braking circuit. This will solve the heat and burn problem of the compressor "

Zhang Hong's brows tightly wrinkled, "The vibration level and the problem of avoiding compressing air?"

"Yes, so this area. . . Still needs the engineers to pay attention and deal with it. " Professor Huang looked at Su Jianguo and said, "I think Little Su should be clear about this. "

"Yes, Professor Huang, if this is the solution, we only need to train the processing of the air dryer pressure switch signal and the installation of a single valve to solve this problem. " Su Jianguo nodded. As long as he knew where the problem was, he would know how to deal with it.

"Old Huang, you can do it. You have a Treasure Chest here. You know everything. " Zhang Hong smiles.

"Hey, we are the national train technology department. Of course, we need to have a deeper understanding of the train technology. " Professor Huang said with a smile.

"I need to tell Professor Zhao about this quickly. If it can be implemented, we will solve this problem completely. " Su Jianguo said with a hopeful tone.

"That's right. There was another good thing to tell everyone, and that was. . . The technology of the converter. On my side, I found a solution yesterday. " Professor Huang smiled as he took out his thesis, "I'm preparing to publish a thesis. Let's go to my laboratory. "

Professor Huang invited a group of people to his laboratory.

Yes, from that day onwards, Su Jianguo and Cheng Jianjun got to know the CHR1 Motor Team. This was the China Motor Team that had developed, built, and improved themselves.