Chapter 368: A small test of skills at the shipyard
Zhu Xuefeng, who stepped on the train overnight, was still sighing, it was such a hard life, and he 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 has experimented with new engines based on new materials and solutions. The power has indeed been greatly improved, but the speed still cannot meet expectations. 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 it. The cylinder locks after the engine overheats.
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 developed by 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 and Chen from the Materials Research Institute. Director and two technical staff and three senior workers 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. There really 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 goes wrong, there is no need to think about it. , it was a heavy blow to everyone’s enthusiasm and the promotion of new materials.
"Chen Suo, we will always find problems. Now our task is to recharge our batteries. This journey will take a long time. Besides, this is not the place to discuss this. You should go to the sleeper berth to accompany the leader. Go and rest.”
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.
Taking out a pen and paper, looking for peace among the noise, he was immersed in his own ideas for a while. Director Chen watched Zhu Xuefeng start drawing one stroke at a time without making any sound. , with his eyes closed to rest, he gave up the sleeper berth and wanted to analyze it with Xiao Zhu in advance, but now he can only sit and rest.
…
A coordination meeting was held on site with the participation of all parties. Representatives from military regions, steel plants, diesel engine plants, shipyards, navy and military, and steel rolling mills were all present. All heavy.
Looking at Fang Jiaming’s father sitting among the military representatives, Zhu Xuefeng was also frightened. Has this incident alarmed the local bosses? Chief Fang also saw Zhu Xuefeng unexpectedly. After seeing the list of participants, , even more confused, when did his son’s classmate become the representative of the steel rolling mill.
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 out the problem and the project was delayed. Sorry.
“Three days is too short. I know their engines are huge. Even if they check them one by one, it won’t be completed in three days.”
Technician Lao Cheng I was worried. At that time, the steel rolling mill had no idea 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.
“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. It must be confirmed as soon as possible.”
"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 them and we are willing to cooperate with the steel rolling mill to test again."
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.
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. Check all relevant production details to see if there are any problems. "
The three companies also nodded to accept the task. The military finally said, "The engine test site will be inspected by the diesel engine factory, military design representatives and the steel rolling mill. To see if there are improper designs or other problems, Representative Niu, the representative of the Navy, will be responsible.”
After the meeting, everyone left in twos and threes. Zhu Xuefeng said hello to the leader and chatted with Secretary Yang from the steel plant. After a few words, they were still very cordial after not seeing each other for a few months, and bid farewell to Secretary Yang.
Knowingly, I stayed downstairs. Sure enough, the leader and the military representative came over after a while.
"Classmate Xiao Zhu, I still remember you. How did you suddenly transform into the representative of the steel rolling mill?"
…
"You mean, you and Xiao Ming Are you all in this materials research project?"
Zhu Xuefeng nodded, "We have been following this project for more than four months, and we joined the project team in March. We are interning in this project team during the summer vacation." br>
“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.”
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.
Thinking of this project, he patted Zhu Xuefeng on the 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 way. The hull has been built. They insist on installing a new engine and they 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."
Captain Fang was very satisfied with Zhu Xuefeng's promise and called the navy representative Niu Dongwei.
“Xiao Niu, time is very tight, and I don’t have to tell you how important it is. 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, sir, please rest assured. We will work closely to ensure the completion of the task." Representative Niu stood at attention, saluted, and answered seriously.
The representatives of the steel rolling mill also held a meeting in 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 is 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 can 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 I will bear it.”
Director Zhao patted Zhu Xuefeng’s shoulder sincerely. This burden is indeed very heavy. It is unreasonable for a young man to bear it. As the leader of the team, he has the unshirkable responsibility.
"Don't worry, leader, I am confident to complete the task!"
Director Zhao and Director Chen's eyes lit up, it seems that this kid has 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, and kept comparing the drawings. Zhu Xuefeng took out the drawings he had already drawn, and Check one by one. The engine design was perfect, and it 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 was not installed. The movement of the piston can be seen intuitively. Now the piston and the cylinder are in close contact.
Through the fluoroscopy eye, you can clearly see 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, as the temperature dropped, the piston and cylinder also There is looseness.
The piston rod has not deformed. It seems that the experiment was terminated as soon as possible. Otherwise, if the piston moves a few more times, it will definitely deform. This experimenter must be experienced and paying attention at all times.
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.
Looking at the frustrated 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. If you can't separate them, how can you analyze them?
"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 words, the masters at the steel rolling mill Cooperating with Zhu Xuefeng, it was restored to its original state without much effort. It was just a lock. Because they were all made of ductile iron, there was no locking.
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 slightly deformed, which proves that there is no problem with the strength and toughness."
"The two masters, now the cylinder body There are some scratches on the contact surface with the piston, please repair it now, as long as there are no bulges.”
…
Director Chen carefully inspected and checked the engine materials, and also checked the inspection records of the materials, and said with certainty.
“The materials from 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. , the cylinder will explode 100% of the time.”
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 fitting dimensions on our drawings have been verified on a variety of engines and there are no problems.”
See Zhu Xuefeng finally focus on the fitting of the piston In terms of size, the designer kindly reminds you that there is no problem with this matching size.
Zhu Xuefeng carefully measured the size of the piston, checked the matching size of the cylinder, and then compared it with the drawings to make a preliminary judgment.
“I just checked the experimental records. When the rotational speed reaches 3000, the experiment will run for a period of time. After confirming the smooth operation, the rotational speed will be gradually increased to 500, and so on, right.”
The designer and 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 you test it again and let the fault recur?"
Zhu Xuefeng put forward his own suggestion. The scene was quiet. The recurrence of the fault is to determine the cause of the fault. One of the important means is that the cylinder block has been slightly deformed, and the designer is clueless. I don’t know if 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 after making 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, and it will be difficult to reproduce the fault."
"Director Chen, do you have any questions about the material? Be sure, I am sure of my judgment.”
“Okay, let’s prepare for the test drive.”
“Wait a minute, please keep the people as far away as possible for this test drive.” , do not use water cooling until there is no requirement, directly increase the speed to 5000 rpm and then start recording. Every thousand is a jump, and each time is maintained for no more than 10 seconds.”
Experts and designers present all agreed. Surprisingly, not using water cooling will cause the engine to operate at high temperatures, which greatly increases the risk. The temperature may be too high and the engine may 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 up again and the engine started to spin. Although the cylinder block was slightly deformed, the cylinder and piston were still functioning normally.
"Increase the speed."
The engine roared cheerfully, and the temperature of the cylinder began to rise.
“Continue to increase the speed.”
Soon it reached 6,000 rpm, which had exceeded the maximum speed of the original engine, and the power output also exceeded the original engine. The cylinder emitted a slight metallic sound. and the smell of engine oil, the temperature should have risen.
7000 rpm has exceeded the speed of the last failure. The last time the failure occurred after more than 20 minutes at 6500. The crowd at the test site was silent, as if something was brewing and would explode at any time. .
(End of this chapter)