"Did you really see?" The little girl was unsuspecting and looked surprised.

In a blink of an eye, she became worried again and asked, "Have you seen such a connection method?"

"Of course, heavy machinery such as coal mines and oil like to connect with shaft sleeves." Su Cheng woke up after saying that, it was 1987 now.

In early heavy machinery, the connection between the gearbox shaft and the gear was usually an interference connection. During maintenance, once the gear and shaft were disassembled and the connection failed, the repair significance would be lost. If reprocessed, the assembly and connection quality could not be guaranteed. For example, oil production machines on site in the oil field were usually replaced by large gears. Due to the interference connection, the maintenance worker had to replace the gear and shaft together, causing great losses. If the shaft sleeve is used, the gears only need to be reprocessed, which naturally reduces the maintenance cost.

However, the popularization of such technology will take 10 or even 20 years later. After most of the machinery is updated, Su Cheng has now said it, which has obviously damaged people's enthusiasm.

The little girl really lowered her head in frustration and said, "I knew that such an invention has been made."

Su Cheng quickly remedyed: "I have never seen this kind of coupling method you designed. There are many types of couplings. As long as it is not repeated, it is a new invention."

"Have you seen other bushing connections?"

"Of course, for example...swelling connection." Su Cheng thought of a connection method that should not appear now.

"Can you show me?"

Su Cheng hesitated for a moment, took out a pencil, and drew a schematic diagram of the coupling of the expansion sleeve at the corner of the edge of the drawing. This was an advanced coupling method for the shaft sleeve during his school days, but the essence was very simple, and it still caused friction between the shaft and the connected part through pre-tightening screws and the connecting sleeve.

Without considering the proportional relationship, Su Cheng drew a schematic diagram in just a few strokes and said: "The friction force that transmits the load must be calculated, which is probably what it is."

"You are so awesome. My name is Shu Lan. I am from Shengli Petroleum School. What about you?" The girl stretched out her hand generously, with a pink face.

"I work in the oil production team.Siucheng."

"There are also people in my family in the oil production team, but they are not as good as you." Shu Lan heard that he was a worker and immediately felt a little fond of it and her tone became more friendly.

Su Cheng smiled and said, "I usually like reading. Are you about to graduate when you are in school?"

"Yes. Today I just want to show the drawings to the teacher..." Shu Lan said, oh, and said, "Sorry, I have to go to the design institute."

"You go, I'll read the book for a while, and I'll leave." Su Cheng watched Shu Lan leave the library, feeling hot all over, and patted his forehead hard, thinking: What are you thinking, I'm still young.

At the same time, there was another thought in my mind: it was actually not small if it was so well developed.

...

Shu Lan walked quickly to the Design and Planning Institute.

Her teacher Liang Jianguo works in the research institute and only goes to school for two days a week.

Like the Gudong Oil Recovery Command, the institute is also a secondary unit of Shengli Oilfield. It is of the same level as the Institute of Geological Sciences, Drilling and Oil Recovery Technology Research Institute, Shengli Petroleum School, Shengli Health School, Normal College, Staff Training College, Oilfield Party School, Central Hospital, Wuqi School, Shengli Hospital, Yantai Nursing Home, Cadre Retreatment Center, etc. It is considered a relatively leisurely position in the logistics department, and of course, it has less power.

However, Liang Jianguo is a veteran technician in the oil field. He leads the team to do design research every day, so that he can hand over a topic to the students in the class at will.

Seeing Shu Lan tiptoe to push the door and come in, Liang Jianguo laughed in silence and shouted, "What, are you dizzy when you bully me old man?"

"Master Liang, how dare I?" Shu Lan became much more lively at this time. She ran to the experiment table with the drawings in her arms and said with a smile: "I went to the library to check the information this morning, but there are still many things I don't understand."

She said as she spread out the drawings.

Liang Jianguo said "hmm", put on reading glasses, and looked at it seriously.

However, his eyes quickly wandered out of the drawings, pointed to the diagram on the side and asked, "Is this what you drew?"

"No, it was a worker I met in the library, he drew it."

Liang Jianguo simulated it in his hand and sighed: "This is a good design. It's just that the drawing is too simple and the various parameters are not marked, so it's not easy to judge."

"Yes, I remember him saying that the friction force that transmits the load must be calculated." Shu Lan thought with her head.

"That's about torque. Do you think you are a worker?" Liang Jianguo was a little unbelievable.

Shu Lan said affirmatively: "Yes, he said it was from the oil production team."

"Which oil production team belongs to?"

"This..." Shu Lan couldn't say it.

"It is better to calculate torque and transmit load than the college students in our college, and his design is quite novel." Liang Jianguo shouted backwards: "Xiao Wu, come on and draw this diagram to see."

The design drawing for a connection is quite simple, mainly the relationship between the gear and the shaft, plus a middleware.

Xiao Wu is also 30 years old. He drew it in a few seconds, took it over and said, "Mr. Liang, your design is exquisite. If you replace all our equipment, you can save a lot of money every year."

"I didn't do it. Look, if there is only the drawing of this diagram, is the data easy to calculate?" Liang Jianguo was a technical secondary school student in his early years. He could do calculations before, but when he got older, he rarely did it himself.

Xiao Wu stared at the drawings for a while and said, "It's a bit difficult. It probably takes ten days and half a month. We have a lot of tasks now, otherwise we can call a few more people together."

Shu Lan suddenly jumped up like a white rabbit and said, "I'll go find him."

...
Chapter completed!