Restarting life in Siheyuan

Chapter 368 A small test of skills in the shipyard

Zhu Xuefeng, who had boarded the train overnight, was still lamenting that he had such a hard life and had no time to spare. He didn't go when the navy invited him last time, and it would be impossible not to go this time.

The Navy experimented with new engines based on new materials and solutions. The power was indeed greatly improved, but the speed was still not as high as expected. This is because the problem of heat dissipation is very prominent. Traditional water cooling can solve the problem of heat dissipation, but it cannot solve the problem of cylinder locking after the engine overheats. die.

After careful inspection, the designer confirmed that it may be due to the use of new technologies or new materials, both of which were provided by the rolling mill.

These two new technologies in the steel rolling mill were all the work of Zhu Xuefeng. The Navy's project schedule was very tight and there was not much time for the designer to carefully study the problem.

So Zhu Xuefeng made this hurried trip. He was led by the technical director, Director Zhao. Also there were three technicians from the Technical Department who were cooperating with the casting method research, Director Chen from the Materials Research Institute, and two technicians. personnel and three senior engineers involved in engine casting.

The huge team of eleven people seemed to be very important. Their destination was the shipyard near Yangcheng. There was a place dedicated to serving the navy and it was kept strictly confidential.

"Xiao Zhu, where do you think this problem lies? I always feel that it has little to do with our materials. The heat dissipation effect of our materials is pretty good. The factory has produced so many engines, and there has never been a similar situation. ”

Director Chen also lowered his head and thought hard. This is a new material from the Institute of Materials. It is the first time it has been put into use outside the steel rolling mill. If it is messed up, don’t even think about it. It will be heavy on everyone’s enthusiasm and the promotion of new materials. blow.

"Chen Suo, we will always find the problem. Our task now is to recharge our batteries. This journey will take a long time. Besides, this place is not the place to discuss this. You should go to the sleeper to rest with the leader."

Looking at the noisy carriage, it was the end of August and the temperature in the carriage was still not low. Zhu Xuefeng also sighed. He traveled south twice in one summer vacation and couldn't fly. It was such a waste of time.

Zhu Xuefeng nodded, "We have been following this project for more than four months. We joined the project team in March and will be interning in this project team during the summer vacation."

"The steel plant cooperates with the rolling mill to confirm whether the materials meet the design requirements of the rolling mill. This matter is the responsibility of Secretary Yang of the steel plant and Director Chen of the rolling mill. They must confirm as soon as possible."

The military nodded and then made arrangements, "The casting of the engine this time is the joint responsibility of the diesel engine factory and the shipyard. It is carried out according to the casting process of the steel rolling mill. Director Zhao of the steel rolling mill is asked to be responsible. The two factories will cooperate to check all relevant production details. See if there is a problem."

...

A coordination meeting involving all parties was held at the scene. Representatives from the military region, steel mills, diesel engine plants, shipyards, navy and steel mills were all gathered together. Everyone looked very heavy.

Secretary Yang is very confident. The steel rolling mill and them are in the same system and have a very good relationship. All technologies are transferred unconditionally, and the materials have been tested and there are no problems. However, the investigation that needs to be carried out still needs to be carried out.

Chief Fang laughed and cursed. Although the test run failed this time, he has a certain understanding of the performance of the material. It is a good thing. It is a great thing that his son actually entered such a project that benefits the country and the people.

"This bastard didn't say anything to me. He just said he couldn't come back from his school internship during the vacation and asked me to send him money."

"No problem. We produce it strictly according to the technology and formula of the steel rolling mill. We still have the materials from the same period. We have already tested it and we are willing to cooperate with the steel rolling mill to test it again."

Seeing Fang Jiaming's father sitting among the military representatives, Zhu Xuefeng was also shocked. Has this incident alarmed the local bosses? Chief Fang also saw Zhu Xuefeng unexpectedly. After seeing the list of participants, he was even more confused. His son When did my classmate become a representative of the steel rolling mill?

I stayed downstairs knowingly, and sure enough, after a while, the head of the party and the military representative came over.

After the meeting, everyone left in twos and threes. Zhu Xuefeng said hello to the leader and chatted a few words with Secretary Yang from the steel plant. They had not seen each other for only a few months, but they were still very cordial and sent Secretary Yang off.

"Classmate Xiao Zhu, I still remember you. How did you suddenly transform into the representative of the steel rolling mill?"

Taking out a pen and paper, he looked for peace amidst the noise. After a while, he was immersed in his own ideas. Director Chen watched Zhu Xuefeng start drawing strokes one by one. He stopped making any sound and closed his eyes to rest. But I gave up the sleeper berth and wanted to analyze it with Xiao Zhu in advance, but now I can only sit and rest.

There was no objection to the content of the meeting, because the materials were produced according to the technology of the steel rolling mill, and the engine was modified according to the suggestions of the steel rolling mill. The representatives of the steel rolling mill were given three days at the meeting to find the problem, and the project could not afford to be delayed.

...

Technician Lao Cheng was worried. At that time, the steel rolling mill was unsure about this big guy, so it did not undertake the production and development task. Now it is required to determine the problem for three days. It is too difficult.

"Three days is too short a time. I know their engines are huge. Even if they check things out bit by bit, it won't be able to be completed in three days."

"You mean, you and Xiao Ming are both in this materials research project?"

The three companies also nodded to accept the task, and the military finally said, "The engine test site will be inspected by the diesel engine factory, military design representatives, and steel rolling mills to see if there are improper designs or other problems. Representative Niu, the navy and military representative, will be in charge." "

Thinking of this project, he patted Zhu Xuefeng's shoulder again and said with a serious expression.

"I only gave you three days. It must be a lot of pressure. There is really no other way. The hull has been built. They insist on installing a new engine and are waiting to use it. I can only wrong you."

Zhu Xuefeng straightened his body and said, "Chief, please rest assured. Although our factory cannot build such a large engine now, we are currently producing thousands of engines every month. We are well aware of this issue and will definitely complete the task on schedule."

Chief Fang was very satisfied with Zhu Xuefeng's promise and called the navy representative Niu Dongwei.

"Xiao Niu, time is very tight. Even if I don't tell you, you know the importance. You must cooperate with the comrades in the steel rolling mill to find the problem as soon as possible and propose reasonable solutions to ensure the smooth progress of the project."

"Yes, please rest assured, chief. We will work closely to ensure the completion of the task." Representative Niu stood at attention, saluted, and answered seriously.

Representatives of the steel rolling mill also held a meeting at the guest house overnight under the auspices of director Zhao to strictly implement the military's requirements. Several people from the steel rolling mill were divided into three groups.

Director Zhao leads the technical staff to check the technical control of the production process, which must be completed in one and a half days. Director Chen leads the technical staff to check whether the materials meet the material requirements of the steel rolling mill, which must be completed in one day.

Zhu Xuefeng was in charge of the site, leading two senior engineers and one craftsman to check the engine's compliance with the drawings and troubleshoot possible faults. This could only be done in accordance with military requirements, and the results must be available within three days.

"Xiao Zhu, we all feel that your group is the most difficult and uncertain. Don't have any ideological baggage. We will search after we finish the group work. This responsibility is not yours, it belongs to the steel rolling mill. I Will bear it.”

Director Zhao patted Zhu Xuefeng's shoulder sincerely. This burden was indeed very heavy. It was unreasonable for a young man to bear it. As the leader of the team, he had no shirking responsibility.

"Don't worry, leader, I am confident that I can complete the task!"

Factory Director Zhao and Director Chen's eyes lit up. It seemed that this boy had something in mind.

This was already the afternoon of the second day after arriving at the scene. Several people were carefully measuring and surveying in front of the slightly deformed oversized engine. They were constantly comparing the drawings. Zhu Xuefeng took out the drawings he had drawn and worked on them one by one. Check. The engine design was perfect, which also gave Zhu Xuefeng a lot of insights. If there were no accidents, the maximum power could be increased by more than half. But now, according to the experimental records, the cylinder failed before the speed reached the design speed, and the piston and cylinder block appeared. die.

In order to facilitate observation during the experiment, the protective cover on the piston is not installed, so the movement of the piston can be seen intuitively. Now the piston and cylinder body are in close contact.

It can be clearly seen through fluoroscopy that there is a slight bite between the piston and the cylinder, but it is not dense and should be separated. It should be that after the experiment was forced to interrupt, the piston and cylinder also became loose as the temperature dropped.

The piston rod has not deformed. It seems that the experiment was terminated immediately. Otherwise, if the piston moves a few more times, it will definitely be deformed. This experimenter must be experienced and paying attention all the time.

After shaking the rocker a few times, the piston did not move at all. Zhu Xuefeng was afraid that he would damage the rocker by using too much force, so he did not increase the force. He just found a large solid rubber hammer.

"Master, in a moment you can help knock the pistons hard one by one. I will shake the rocker here and try to get the piston and cylinder to separate."

"Stop immediately! Comrade, you are destroying the scene and making it impossible to conduct follow-up analysis." Before he could take action, he was stopped by a representative from the engine factory.

Seeing the furious representatives, representatives from the shipyard and navy also gathered over.

"Senior, what you said makes sense, but without separation, there is no way to observe whether there is a problem at the contact surface, and there is no way to analyze whether it is."

Everyone nodded, unable to separate and analyze.

"What the comrades at the steel rolling mill said makes sense. They have their own ideas, so we can just support them in what they do."

The navy representative finalized the sentence. The masters of the steel rolling mill cooperated with Zhu Xuefeng and restored it to the original state without much effort. It was just a lock. Because they all used ductile iron, there was no seizure.

Zhu Xuefeng carefully inspected the cylinder wall and piston surface, and there was not much damage. The strength and toughness of the ductile iron are really reliable. It may be because of the emergency shutdown due to malfunction. They are still basically intact at present.

"There is no problem with the material. It has withstood a lot of pressure exceeding the design requirements, but only suffered slight deformation, which proves that there is no problem with the strength and toughness."

"Two masters, there are some scratches on the contact surfaces of the cylinder block and the piston. Now you should repair it quickly, as long as there are no bulges."

...

Director Chen carefully inspected the engine's materials and checked the inspection records of the materials, and said with certainty.

"The materials in the steel plant fully meet the requirements of our plant. We recognize that the strength and toughness of this batch of materials are completely consistent with our research. If the previous materials were used, this time it would not be a failure, but an accident. It would 100% explode. Cylinder."

The engine designer and manufacturer agreed with Director Chen's judgment.

Director Chen's team was the first to come to a conclusion and hurried back to the shipyard to participate in the on-site investigation.

...

"The matching dimensions on our drawings have been verified on multiple engines and there are no problems."

Seeing that Zhu Xuefeng finally focused on the matching size of the piston, the designer kindly reminded that there is no problem with this matching size.

Zhu Xuefeng carefully measured the size of the piston, checked the matching dimensions of the cylinder, and then compared it with the drawings to make a preliminary judgment.

"I just checked the experimental records. After the rotation speed reaches 3000, the experiment will run for a period of time. After confirming that it is working smoothly, the rotation speed will be gradually increased to 500, and so on, right?"

The designer and the factory both nodded. This requirement is very demanding, but for a new engine, no matter how demanding it is, it needs high reliability.

"The engine should still be working now. Can it be tested again to prevent the fault from recurring?"

Zhu Xuefeng put forward his own suggestion, and the scene was quiet. Fault recurrence is one of the important means to determine the cause of the fault. However, the cylinder block has been slightly deformed, and the designer has no clue. It is not known whether there will be a cylinder explosion accident.

The designer and factory technicians discussed for a long time, and with the support of the military and proper safety preparations, they agreed to Zhu Xuefeng's suggestion.

"Xiao Zhu, are you sure? After the fault occurs again, the deformation may be more serious. It will be difficult to reproduce the fault again."

"Director Chen, if you are confident in the materials, I am confident in my judgment."

"Okay, then get ready to test drive."

"Wait a minute, for this test run, firstly, please keep people as far away as possible, and secondly, do not cool down with water until there is no request, directly increase the speed to 5000 rpm and then start recording. Every thousand is a jump, and each time it is maintained no more than 10 seconds."

The experts and designers present were all surprised. Not using water cooling would cause the engine to operate at high temperatures, which would greatly increase the risk. The temperature might be too high and the engine would explode.

"Believe me, you all go out and I will observe the scene alone."

In the end, it was the Navy representatives who had been to the steel rolling mill last time who made the decision to agree to the experiment. They knew that the young man in front of them had successfully produced countless small engines using this material and method, and there might be something secret about it.

The engine oil was filled again and the engine started to spin. Although the cylinder block was slightly deformed, the cylinder and piston were still functioning normally.

"Raise the revs."

The engine roared cheerfully and the cylinder temperature began to rise.

"Keep revving it up."

It soon reached 6000 rpm, which had exceeded the maximum speed of the original engine, and the power output also exceeded the original engine. There was a slight smell of metal and oil in the cylinder, and the temperature should have risen.

7000 rpm has exceeded the speed of the last failure. The last time the failure occurred after more than 6500 minutes at , the crowd at the test site was silent, as if something was brewing and it would explode at any time.

(End of this chapter)