"Why?" Chen Duan couldn't understand for a while.

"For many things, one principle is not enough, and the Stirling engine was invented before the internal combustion engine, but it was really developed, much later, and one of the reasons is here.

"Due to the peculiarities of the structure, the vaporization phenomenon caused by the use of liquid lubricating oil will condense on the recuperator and cause blockage, a problem that has plagued manufacturers for countless years, and it was not solved until later advances in materials science.

"Now the main use of polytetrafluoroethylene and other polymers and graphite and other fillers to make pistons, which can form self-lubrication at a high temperature of 250 degrees, which perfectly solves this problem."

Speaking of which, even Dong Junwei and others actually don't understand it anymore.

Chen Du asked, "That is to say, this thing can't use lubricating oil, and can only rely on the material itself to solve the problem of friction?" ”

"That's what it means."

"No wonder you need Ann's help." Chen Du nodded.

"Yes, as I said before, we can do a lot of machinery and equipment very early, but before some key technical problems are solved, it is just a pile of scrap metal."

Tang Jing said, "Lubrication and heat dissipation have always been the most headache problems, and now with Anrusu, we have actually solved a lot of technical problems, and the machines will only become more and more advanced in the future." ”

"There's one more question." Chen Du said, "Since it is an external combustion engine, there must be an external heat source, and your plan is to use the squad leader's heating metal function?" ”

"Yes."

"But how exactly is this going to be implemented?"

"The biggest problem now is the ability of the squad leader to wrap the outside of the cylinder's hot chamber with metal, and then heat it up.

"Although the temperature can last for 24 hours, it will slowly cool down over time, so it doesn't really last long."

Tang Jing said this and looked at Dong Junwei.

Dong Junwei was a little ashamed, entangled for a moment, and retorted in a low voice, "It's 26 hours now." ”

"It's not enough, squad leader!"

"You have to work hard!"

"Everyone else is improving, why don't you stand still!"

“……”

Dong Junwei has always been the only one who educates others, and it is rare to have the opportunity to reprimand the chief decision-making officer, and everyone is so excited.

The room was filled with pleasant air.

An Ruosu and Yang Li watched Dong Junwei's face flush when everyone said it, and said in their hearts that this is really the highest person in charge of Qiming?

"In that case, when will the construction begin?"

The technical problems are solved by Tang Jing, and Chen Du is ready to continue to be a tool man.

"Tomorrow."

……

The engine is the heart of industrial civilization, and its importance is self-evident, and the first industrial revolution was marked by the replacement of manpower by the steam engine.

Early the next morning.

As soon as Chen Dui finished practicing with He Ying, Tang Jing, who was waiting next to him, hurriedly pulled him away.

The materials needed had been prepared by Wei Dalei, and Tang Jing took out a few drawings with this detailed size and handed them to Chen Du.

The collaboration between the two is basically this model.

First, Tang Jing either drew or dictated, and all the large and small parts needed were made, and then the two of them assembled them together, and then made continuous adjustments in this process until a piece of equipment or a machine was produced.

The loom, which was completed just a few days ago, is the pinnacle of the duo's collaboration.

But after having An Ruosu, Tang Jing felt that the original loom was not satisfied enough, and was ready to build a new one later.

The previous one was a relatively primitive manual shuttle loom, the volume was very large, and the operation was more difficult, and the initial operation experiment was completed by Wei Dalei, but Lao Wei was such a big man, and it was really a little incompatible to do this kind of thing.

Now that the engine plan has been implemented, if it goes well, the weaving can also be changed from manual to motorized, and of course the entire loom basically needs to be remanufactured.

In terms of construction, the loom is more complex, but not as strict as the engine in terms of precision.

On the morning of the first day, Chen Dui made the cylinder more than a dozen times, but Tang Jing vetoed it every time, either because the flatness was not enough, or the size was wrong.

In fact, there is no good way to do this, it is nothing more than trial and error again and again, when manufacturing new products, this stage cannot be avoided, once it is successful once, the follow-up is much easier.

In the next few days, Chen Du immersed himself in manufacturing the parts designed by Tang Jing, and in his spare time, Tang Jing would take An Ruosu to repair the previous lifts, specifically to reduce the friction between the contact surfaces between some components.

The so-called reduction of friction is only a general conceptual description, but in fact, when it is actually done, the situation is very complicated.

First of all, Anrusu must use his hands to directly touch the surface of the object before it can be polished, so many places that have already been built need to be dismantled and rebuilt.

Secondly, the polished surface has improved gloss and feel, but it is difficult to distinguish with the naked eye, so if Anrusu is on the ground with little friction, it is almost equivalent to a trap, and whoever walks will be unlucky.

Finally, reducing friction is not the same as making friction disappear, and the degree of smoothness depends on the material of the object itself, as well as the strength of Anrosu's ability.

Looking at it now, the limit of her ability is okay, but her mental strength is relatively poor, that is, the continuity and work intensity are not enough.

Day 3.

Chen Du finally built a cylinder that satisfied Tang Jing, although it was only a part of the hot cavity, but with this good start, the follow-up would be much smoother.

On the fifth day, the cylinder was completed.

On the seventh day, the piston was completed.

After these two parts are completed, the next step is to dock with Anrusu, and the part between the piston and the cylinder must be tightly sized and dimensioned to meet the sealing requirements and achieve minimum friction.

Of course, the latter is no longer a problem.

On the tenth day, the prototype of a Stella engine was almost completed.

Everyone gathered around the machine, all with incredible expressions.

Compared to the previous clockwork mechanism and elevator, this engine is significantly more refined and technological, with a silvery stainless steel casing, a near-perfect roulette disc, and a thick and powerful linkage rod and piston...... All this seems to herald a bright future.

This was followed by a trial run.

Tang Jing closed the metal block heated by Dong Junwei to the outside of the hot chamber of the cylinder through the rotating shaft.

However, after waiting for a while, there was no movement from the machine.

"What's going on? Did something go wrong? ”

"Don't worry, the slow response is really a big disadvantage of this engine."

Sure enough, after waiting for more than ten or twenty seconds.

The piston inside the cylinder finally started to move.

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