Ten miles of spring breeze blows clouds and smoke, and thousands of peach blossoms bloom. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

The water in the stream became clearer and clearer, and the water showed a green color, which was not the color of water, but the green of the trees reflected in the spring water.

The temperature gradually rose, and Liu Yuanshan's jacket outside finally took off, and he changed into thin clothes to greet Wang Xiucai. Many people came to Wang Xiucai's house, some young and old, some happy and some disappointed, and they all talked about the situation of this year's children's exam.

Whoever is the head of the high school

Whoever is famous again Sun Shan!

Liu Yuanshan asked in private: "I don't know if my uncle Liu Xiaozhong can be hit?" ”

Wang Xiucai shook his head: "I didn't win, not only did I not win, but it is said that I didn't enter the exam at all!" ”

"Why is that?"

"Maybe it has something to do with his ** crime a year ago, although he is not convicted now, Lord Huang said that he will not be able to participate in the scientific examination in this life......"

Liu Yuanshan sighed and didn't ask more.

People are warm and cold, and the world is cold, and this kind of thing is no wonder to others.

At that time, Lord Huang saw that Liu Yuanshan had a bright future, so he let Liu Xiaozhong acquiesce to him to continue to participate in the scientific examination, but now that Liu Yuanshan is useless, there is no need to go to the pole to curry favor. As for Liu Xiaozhong, since he has been exempted from the crime, he can't be convicted again, otherwise his prestige as Lord Huang will be damaged, as for participating in the scientific examination, hehe!

Liu Yuanshan didn't waste time on the pole, so he said goodbye to Wang Xiucai and returned to the mountain.

Today, there is a happy event!

After nearly a month of hard work, Han Laotie and the three finally made all the parts of the steam engine and installed them. Report Liu Yuanshan waiting for the next step.

Although Han Laotie got the entire steam engine out according to Liu Yuanshan's intentions, he still didn't understand what this pile of iron lumps was for.

Liu Yuanshan said before that it was an organ, but how does this organ work?

It didn't take long for Liu Yuanshan to see the installed steam engine, and it looked like that, but he didn't know if it could run it, and he could only see the effect after trying it.

Because it is the first generation product, the design is quite rough.

The cylinder of the steam engine is very large, almost the thickness of the plastic barrel of later generations, the diameter is about thirty or forty centimeters, the length is about half a meter, and the flywheel is a solid round iron wheel, the mass is quite large, almost more than 30 catties.

As for the belt for transmission, Liu Yuanshan used a crude version of the belt sewn into animal skin, so I don't know if it can withstand the high temperature when it rotates rapidly.

The connecting rod is made exactly the same, but in general it is very clumsy, and it does not have the agility of later machines.

It's a little heavier, as long as it can run!

Liu Yuanshan thought silently in his heart, reached out and held the huge flywheel hard, and rotated it in a clockwise direction with all his might.

The flywheel rotated slowly, driving the connecting rod, twitching back and forth, and the round-trip movement of the connecting rod drove the piston in the cylinder to press and contract, and finally the steam control switch next to it also moved, and it seemed that it really became a whole.

But every time the flywheel turns, it always feels a little awkward.

Liu Yuanshan carefully looked for the reason, and it took a long time to find that there was something strange inside, it turned out that the moving distance of the connecting rod connected to the flywheel did not match the displacement of the piston, which caused the movement to be stiff.

Fortunately, the connecting rod was a little longer, and he asked Han Laotie to take off the connecting rod and re-polish and cut it, and then install it after removing the length of nearly three centimeters, and this time it was much more rounded.

The operation mechanism of the steam engine is actually like this: first, the high-pressure steam enters the cylinder through a small hole, and then the high-pressure gas in the cylinder pushes the piston forward, and the connecting rod is withdrawn when jacking, and the second-stage connecting rod has a large activity space, driving the circular flywheel to rotate. When the piston rotates half a turn, the piston just releases the small hole in the middle of the cylinder, and the high-pressure gas is released instantly, and at this time, the air intake hole is blocked by the steam controller, and all the high-pressure gas in the entire cylinder is instantly discharged and becomes normal pressure.

The flywheel is heavy and continues to run under inertia, and when the piston returns to its original position, the air outlet is again obscured, the air inlet is released, and the high-pressure steam invades again.

This is a cycle, and so it goes on and on, and as long as the high-pressure steam is there, the steam engine will never stop.

A very important equipment supporting the steam engine is the boiler, without the boiler, there is no source of power, so the boiler is the heart of the entire steam engine.

The precise and efficient boiler cannot be produced under Liu Yuanshan's current conditions, so he can only make the simplest original boiler, which is very inefficient but very safe.

The boiler made by Han Laotie is actually a closed cylindrical tank, and the tank has two small circular outlets, one is the steam outlet for the steam engine, and the other is the gas outlet.

The gas outlet, as the name suggests, is to transport steam to the outlet of the steam engine; As for the vent, it is an outlet that must be released when the steam in the boiler exceeds a certain pressure, and it also doubles as a water inlet. (Later, the water inlet of the boiler was improved to a curved tube water inlet, which was separated from the air vent.) ）

There is a steel column of the same caliber plugged in the air vent, and a small platform is connected to the steel column, and a certain quality of iron balls is placed on it to control the pressure, Liu Yuanshan doesn't know how to measure the pressure, but he is not afraid, he only needs to control a certain quality of iron balls according to the book of God.

The pipe used to link the steam engine and the boiler is naturally an iron pipe made of Han Laotie, and the diameter of one centimeter is not large, but it is definitely enough for this kind of steam engine.

"Ignite, fill with water!"

For the first time, this kind of thing had to be done by himself, Liu Yuanshan personally opened the vent of the boiler and filled it with water from above, and then inserted the steel column into the water inlet, and put two steel balls about one or two weights on it.

Under the boiler is an earthen pot made of steel, which is filled with charcoal and begins to burn, and in less than ten minutes, the water in the boiler is boiled, and the pressure in the entire boiler is slowly rising.

Liu Yuanshan was really afraid of the explosion of the boiler, so he silently hid from a distance and watched for a long time, but the vent hole on the top of the boiler suddenly opened automatically, and a wisp of white mist rushed straight up from it.

"Whew......" Liu Yuanshan exhaled, as long as the vent can be used, the boiler will not explode.

He immediately walked to the side of the steam engine, stretched out his hand to beckon Shengsheng and Hong Zongwei and said, "Come, let's try to see if we can rotate!" ”

Han Laotie and the three of them came behind Liu Yuanshan inexplicably, not knowing what to do.

Liu Yuanshan pointed to the flywheel and said: "Turn, turn twice, and run out when this flywheel moves on its own!" (To be continued.) )