It took more than half an hour for Yao Ran to finally see Yao Huo complete the installation of the entire equipment, four cylinders, and eight sliding rods. A large sealed iron kettle sandwiched www.biquge.info the periphery of the steam engine has also reached a boiling state, and there is an arm-thick pipe on the upper right side of the iron kettle, and the pipe looks like it should be made of ceramic.

And there is also a small green shiny disc at the interface where the steam is transported like a steam engine. That is the pressure gauge made by Yao Ran. At the end of the pressure gauge is a ball valve that is directly connected to the boiler of the steam engine, and when the ball valve is opened, steam can be transported to the whole steam engine. And the exhaust steam will be exhausted in that huge chimney at the end of the steam engine. The remaining water will flow back into the entire boiler.

The pressure gauge was made by Yao Ran with great effort, in fact, the principle is not difficult, but no one in the entire Yao clan except Yao Ran can make a pressure gauge. This is not nonsense, but Yao Ran has a retinal system, so he can use the reading of the retinal system to make a pressure gauge without a reference.

Yao Ran used two steel reeds, one corresponding to the impact of air pressure under the pressure gauge, and the other corresponding to the pressure of the situation where the two phases of force impact each other was calculated, and a screw at the back of the adjustment gauge could adjust the reading.

In the presence of such a principle, it is also possible to make a measurement scale and use it. And the weighing of the weight does not need to be completely sealed like a barometer, and there is no need for the glass made by Yao Ran.

In this barometer, the light transmittance of the glass on the top of the watch is not very good, a bit like the bottom of a beer bottle, and the light display is not clear. But unlike the dial of Yao Ran's time, the value of this pressure gauge is not written in the pressure gauge, that is, the number is not written under the glass, and it is not engraved on the glass.

Instead, the outer ring of the pressure gauge is directly engraved with metal etching on it, and the scale is written on it, so that through the hands inside the green dial, you can see an approximate range of vapor pressure. There is also a pressure gauge at the end of the entire steam engine to check the load of the steam at all times. There is also the pressure inside the cylinder. The deflation valve is at the end and in the exhaust pipe, and in front of the return pipe.

If there are no two pressure gauges as numerical reading, then operating the steam engine will really become a dangerous job, Yao Huo is like a child who has got a toy at the moment, he is very happy, but after the machine is installed, Yao Huo still ran back to Yao Ran's side, and said to Yao Ran, "Teacher, you come and open the air valve." ”

Yao Ran smiled and shook his head, and said to Yao Huo, "Go ahead, you are the chief engineer here!" Saying that, Yao Ran also patted Yao Huo's shoulder encouragingly, of course, the use of steam engines in the future will be very large, and you still have to mass-produce these things.

As for the barometer, Yao Ran put a adjusted pressure gauge in the watchmaking workshop and adjusted it with the same air pressure, and the two gauges could be used normally if the readings were the same.

In this way, Yao Ran can be a hands-off shopkeeper in the future, go out and have fun by himself, and leave all these tasks to his disciples and grandchildren to complete.

Yao Huo nodded solemnly, of course he didn't know what Yao Ran was thinking in his heart, but he saw trust and affirmation in Yao Ran's eyes, people need affirmation to do anything, even cats and dogs will be happy for a long time if they get the affirmation of their owners, not to mention people, emotions are really something that machines can't measure.

Walking to the side of the gas supply valve, several of Yao Huo's disciples also ran to Yao Huo's side, and heard Yao Huo say, "Record the reading, pressure 10, prepare to send air." Yao Huo moved the valve handle in his hand, Cong's voice was not very loud, and with the introduction of gas, the entire multi-cylinder steam engine that was placed on the wooden shelf directly shook slightly. Then the first cylinder and the first putter began to move. Then came the second one, but when the second cylinder pushed the rod to move, it made some scraping noises. Yao Huo hurriedly looked at Yao Ran in horror, as if seeking an answer.

Yao Ran raised his eyebrows and didn't say anything, in fact, of course Yao Ran could know what was wrong inside. It is caused by the uneven thickness of the iron casting of the sliding rod at the position where the sliding rod and the cylinder gasket are connected, and the friction on the cylinder gasket is generated. But it's not too much of a problem. As long as it runs for a while longer, it will naturally be fine, so Yao Ran is not worried. This is what anyone who drives knows.

But Yao Huo didn't know. However, after the third and fourth slide rods were driven, only the position of the second cylinder made an abnormal noise. After Yao Huo didn't get an answer from Yao Ran, he took a deep breath and said, "Record the barometer, pressure 7." ”

The sound of metal friction this time was not the sound that a highly consistent mechanical equipment should have, and after a minute, Yao Huo turned his head to look at the steam engine, "Xiaolong, how many times have you reciprocated?" The young man called Xiaolong by Yao Huo replied, "A few times, I checked it at a constant speed for a minute, and it was about eighty times." ”

Yao Ran has already told everyone about the concept of time, and it is also popularized in textbooks, but Yao Ran has not yet made the clock for everyone, but this is also one of the things that Yao Ran wants to do in the future. Now the entire Yao clan's method of recording time is still to look at the sundial and the moon.

Xiaolong replied to Yao Huo's words, but his face was not facing Yao Huo, but still staring at the entire steam engine, and as time went on, the movement of each actuator of the entire steam engine became faster and faster.

The rattle of metal grinding that I had just heard turned into a continuous shrill scream, not very loud, but still hard to hear. At this time, Xiaolong turned his head and said loudly in Yao Huo's ear, "In two minutes, there are more than three hundred reciprocating times, and I can't get worse than the one behind." ”

Yao Huo nodded, turned around and moved back to the boiler's gas supply valve. More than 300 times in two minutes, it can be said that it is very fast, of course, this is in the absence of gravity, if the connecting rod is installed and then hung on the carriage, loaded with goods, plus the weight on the body can be retained to one-tenth, ten percent of the running speed, it is already a very high speed.

This is more than ten times more efficient than Yao Huo's steam engine. This is a design drawing made by Yao Ran, not a concept given, but Yao Huo was a little dejected at the moment, after the whole steam engine slowly stopped with the sound of stabbing and stabbing friction, Yao Ran also walked down and walked directly to the edge of the second cylinder, and Yao Huo also stood here, and there were clearly a few scratches on the jet-black color of the cast iron parts showing the bright color of the metal.