When Zhou Jianhua returned to the breeding farm in the evening, it was almost dark, Min Guibao and Zuo Qianghua were anxiously sitting in the restaurant waiting for Zhou Jianhua, and when they saw Zhou Jianhua riding back, they hurriedly greeted him and said, "Why did you come back?!" ”

"Ha Luha, I'm back early today!" Zhou Jianhua replied: "How are you preparing here?" ”

"Hurry up and eat! You say okay while you eat me, hurry up! Min Guibao said impatiently.

"Brother, are you back?!" Zhou Lihua also jumped out of her room, happily rushed up and grabbed her brother's bicycle to help park it.

Zhou Jianhua walked into the room and asked his sister, "How did you study today?" ”

"It's okay, but there are still a few things I don't understand, and I want to ask you." Lihua replied.

"Okay, you look at the others first, and I'll talk to you when I get back in the evening." Zhou Jianhua instructed his sister.

"What's not going to be, you ask Zhong Xue to go! She's at home now. Zhong Min, who also hurriedly came over from next door when he heard Zhou Jianhua's voice, said to Zhou Lihua: "I'll call her over, if you don't understand anything in the future, when your brother is not there, look for my sister, I'll tell her!" As he spoke, he turned around and stood in the corridor and shouted loudly to Zhong Xue in the house.

Zhou Jianhua went to the storage room to wash his face and returned to the dining room, his mother had already served the meal to Zhou Jianhua, sat at the table and greeted, "Hurry up and eat." She had heard Min Guibao and Zuo Qianghua talk about repairing the motor before.

Zhou Lihua had already gone back to the next room with Zhong Xue to discuss the study problem, and Zhong Min also came to the restaurant to wait for Zhou Jianhua with Min Guibao and Zuo Qianghua.

"Mom, have you all eaten?" Zhou Jianhua asked.

"Well, you said you wouldn't let us wait for you, we'll eat first."

"Well, don't wait in the future, it's best! I will have more and more things in the future, and I can't say when I will be able to come back, you can eat when you should eat, so as not to affect Lihua and Ronghua's normal study and rest. Zhou Jianhua said while eating.

"Well, I know it, you can eat it quickly." Mother looked at Zhou Jianhua lovingly and agreed.

"How's it going, are you doing well today?" Zhou Jianhua asked Min Guibao and Zuo Qianghua while eating.

"Well, it's okay in general, what you ask for, we basically did. Now I'm waiting for you to go over and start cultivating! Min Guibao stood next to Zhou Jianhua and said excitedly.

"Three-phase electricity is also connected?" Zhou Jianhua asked, this is what he is most worried about.

"Pick it up! He ** drops, if Wu Blind doesn't pick me up today, he won't let him eat dinner! In the morning, I asked him to pretend, saying that there was not such a long line, and I had no choice but to force him to take me to the street to buy, but he came back late in the morning, and he didn't pick it up at noon, so I stopped him from going back to eat, and didn't let him go until more than 2 o'clock in the afternoon. Min Guibao said with an unhappy face.

"The ...... who bought the cake" Zhou Jianhua couldn't help but shake his head.

Wu Blind is an electrician in the Seed Farm, named Wu Xueliang, because of his deep myopia, he usually wears a pair of glasses, and there are very few people who wear glasses in this era, so his colleagues in the Seed Farm have called him the nickname Wu Blind for many years, and he doesn't think it's wrong. Nowadays, among the young people in the seed farm, there are really few people who know his real name.

"Where did you get the money to buy wires and how much did you spend?" Zhou Jianhua asked again.

"It cost 8 yuan, and the money was advanced by Wu Blind from the finance of the good seed farm, anyway, I have to buy enameled wire or something, and I will rush into it when the time comes."

"Is this money good seed farm willing to come out?"

"No one asks about this, anyway, my father approved a 50 yuan advance for backup, who can manage so much."

"Guibao, you remember, we have to pay back the money to buy wires, and we will also pay the farm rent and electricity bills every month in the future, you can tell your father." Zhou Jianhua looked up at Min Guibao and said solemnly.

"This ...... Not necessarily, right? Min Guibao scratched his head and said disapprerovingly.

"It's necessary! We make money by skill, and we are not greedy for this kind of small cheapness! Moreover, this is also for your father's good, otherwise there may be gossip that is unfavorable to him in the field, so that it will be a big loss because of a small loss. ”

"Okay, I'll go back and talk to him in the evening."

Zhou Jianhua took all the rice in the bowl into his mouth in two bites, picked up the toolkit he brought back, and followed Min Guibao, Zuo Qianghua and Zhong Min out of the house and went straight to the maintenance room.

The maintenance room is not far from Zhou Jianhua's home, on the same side of National Highway 105, which was originally the storage room of the third production team of the improved seed farm. A few years ago, after the seed farm was divided into households, the storage rooms of the six production teams of the seed farm were basically idle, and Min Guibao chose the storage room of the third production team as the maintenance room, which has relatively convenient transportation and is relatively close to the three-phase electric transformer.

The outside of the storage room is made of red bricks and green tiles, only a small window hole is left at the height of the gable to breathe, and in front of it is a wooden door with two openings, no threshold, which is convenient for using carts to transport materials. Min Guibao opened the lock and pushed the door in, and lit the two fluorescent lamps that had just been installed in the afternoon, and the lime brushed on the four walls of the room was very bright, about 20 square meters in size, and the storage shelves and tables, chairs and benches were complete, and there was even a large wooden workbench by the wall, and the three-phase power switch knife was installed in the corner behind the door.

Zhou Jianhua glanced at the room, a satisfied smile appeared on his face, and asked, "Min Guibao, where did you get these tables, chairs, benches, and this workbench?" ”

"Ha Lu Ha! I pestered Section Chief Shen of the General Affairs Section to help me find it from other storage rooms in the afternoon, okay? ”

"Not bad! The overall feeling of this room is very good, it is a very ideal maintenance room, and the application objects are also in place! You guys have worked hard today! Zhou Jianhua said heartily approving.

"Ha Lu Ha...... What is this, as long as the matter of repairing the motor can be done, these are trivial. Min Guibao said proudly.

Zhou Jianhua saw that there were two motors, one large and one small, on the cement floor next to the workbench, and immediately guessed what was going on, pursed his lips and smiled, and asked happily: "Why are there two?" ”

"I went out for a spin in the afternoon and came back with a 7 kilowatt one." Zhong Min smiled and replied.

"Sure enough, you got it back! Okay! So fast action! What's the problem with this motor? Zhou Jianhua nodded approvingly at Zhong Min and asked.

"Hehe, 10,000 years is too long, just seize the day!" Zhong Min replied proudly: "It is estimated that it is damp or burned the coil." ”

"How much do you offer?" Zhou Jianhua asked again.

Zhong Min grinned and replied, "35! ”

"Yes, yes! Did the customer come over in the afternoon to register? Zhou Jianhua asked again.

"Here, I'll do the registration." Zuo Qianghua said, took a piece of paper from his pocket and handed it over.

"I don't look at it, just register it in the format and content I requested, and it's better to register these records in a special book. Qianghua, all our expenses related to repairing motors also need to be recorded, and the handler and registrant must sign, you are responsible for this! ”

"Okay, I'll go buy some books tomorrow and come back to take notes!" Zuo Qianghua responded.

"Alright, let's get to work!" Zhou Jianhua gave an order, and everyone got busy.

Zhou Jianhua asked Min Guibao to put the conventional tools that had been prepared on the workbench, and he also took out several simple special tools that were temporarily processed and made in the afternoon, calipers, multimeters, 500V megohmmeters and other tools from the machine repair class from the tool kit he brought back, and put them on the workbench together. Then several people worked together to lift the 10-kilowatt motor of the seed farm onto the workbench.

"I'll dismantle this first one, you guys will observe carefully on the side, pay attention to my explanations and precautions; The second one will be dismantled by you. ”

After Zhou Jianhua finished speaking, he began to disassemble the machine in order and the key points of disassembly, and explained while dismantling:

"Remove the front cover first, and mark the seam between the casing and the end cover before removing it...... After the screws of the end cap are removed, they can be screwed into the removal screw hole, so that the end cap can be ejected out...... Then remove the fan cover...... Unload the blades again...... Remove the rear end cover again...... Remove the rotor...... Note that before the rotor is withdrawn, a thick cardboard should be padded between the underside of the rotor and the end of the stator winding to avoid damaging the core and winding when the rotor is withdrawn...... The front and rear bearings and bearing inner cover ...... after the most disassembly"

Ten minutes later, Zhou Jianhua removed the rotor of the motor, measured the insulation resistance of the stator winding with a megohmmeter, and said: "You see, this insulation resistance is far less than the required 5 megaohms, it must be a short circuit, and this motor must be replaced with enameled wire." ”

Zhou Jianhua measured the diameter of the stator winding enameled wire with a vernier caliper, recorded it, and estimated the length of the enameled wire of the stator winding, and also wrote it down, and said to everyone: "It's your turn!" ”

The four of them also lifted the 7 kilowatt motor on the workbench, Min Guibao and Zuo Qianghua according to Zhou Jianhua's instructions, it took more than half an hour to dismantle, and then according to Zhou Jianhua's method to measure several insulation resistance data, obviously also to change the enameled wire, then measured the diameter of the enameled wire, estimated the length of the enameled wire that needs to be replaced, and recorded.

Min Guibao changed his habit of being arrogant in the past, and the whole disassembly process was as solemn and meticulous as Zuo Qianghua, while listening to Zhou Jianhua's instructions and operating carefully, until the two finally successfully dismantled the rotor, Min Guibao finally breathed a sigh of relief, took out a cigarette from his pocket and handed it to Zhong Min, he also took one in his mouth and took a few puffs, raised his head and grinned at Zhou Jianhua and said: "It's interesting to get this!" It's much more interesting than gambling cards, playing dogs, driving a tractor, etc.! ”

"How? It's not difficult, right? Zhou Jianhua asked with a smile.

"It's not difficult to dismantle, but what about repairing?" Min Guibao asked.

"It's not difficult to repair!" Zhou Jianhua smiled slyly at Min Guibao and said: "Next, let's write down the parameters of the stator windings of these two motors, so as to make a winding die, and when the coil is wound, we can embed the wire into the stator trunking." ”

Zhou Jianhua roughly measured the size of the stator winding, determined the specifications of the winding die, drew a sketch of the winding machine, and wrote a list and handed it to Min Guibao and Zuo Qianghua, instructing:

"Tomorrow, the two of you will prepare these things separately: the winding die can be processed with wooden boards, the specific requirements have been indicated above, and the two specifications are the same; The winding machine is very important, it is estimated that it is not easy to find this thing on the market, I am afraid that I have to make a simple one, if it is convenient, just do two at the same time, you two use your brains to think of a way, this must be put in place during the day tomorrow! Also, tomorrow according to this list, I will find an electrician Wu Blind to purchase these maintenance materials together. ”

"What a shame!" Min Guibao and Zuo Qianghua replied in unison.

Zhou Jianhua glanced at Zhong Min again and said: "I estimate that according to our current conditions and manpower, it will definitely be no problem for us to repair 20 units a month!" ”

Zhong Min spat out a cigarette and smiled, and responded confidently: "I understand, you see!" ”

"Our task tonight is to remove the stator coils of these two motors, and the removal of the wires is also a bit elaborate and skillful, I will demonstrate to you first......" Zhou Jianhua took a few people to continue to work.

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