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On the eighth day of the ninth month of the twenty-sixth year of Chongzhen, Li Zhi squatted on the ground of the Beihu Machine Tool Factory, looking at the two instruments that measured the power situation.

This instrument is the latest product of the Electric Power Laboratory.

One is to measure the current, the principle is very simple, is to measure the insulated wire coiled on the iron core into a coil, so that the coil forms a certain magnetic force, driving an iron pointer next to it to rotate. The stronger the passing current, the stronger the electromagnetic field formed, and the greater the deviation of the pointer from the zero scale, indicating on the scale the intensity of the current present.

The other is voltage measurement, which uses the principle of electromagnetic induction to form a small current loop next to the main wire. The stronger the voltage in the main wire, the stronger the voltage in the small current circuit, and the stronger the current formed. By making a pointer meter to measure the current in a small current circuit, you can measure the voltage of the main wire.

Today, Li Zhi has written all the physics knowledge he has mastered into textbooks and teaches them at Fanjiazhuang University. Of course, this knowledge of physics also includes knowledge of electricity. Basically, the level of electricity at Fanjiazhuang University is at the level of the freshman and sophomore year of the electrical major in later generations, and it is natural to manufacture such an instrument.

Li Zhi carefully looked at the pointer on the meter and found that the current was very stable at this time.

Li Zhi looked at Chen Yiming, an electrical expert standing on the side, and asked, "Professor Chen, why is the current here much more stable than that of the Fanjiazhuang thermal power station?" ”

Chen Yiming replied: "Back to the prince, the electricity here is generated by the hydropower station, and we have controlled the speed of the water coming out of the hydropower station, and the turbines in the inlet channel are almost rotating at a constant speed. Driven by such a turbine, the current generated is naturally very stable. ”

Li Zhi nodded.

Hydroelectric power stations are a good thing. Compared with thermal power stations, which use steam engines to convert heat energy into potential energy, the output power and current of hydropower plants are very stable. You must know that today's Li Zhi does not have the ability to stabilize the current, and if you want to obtain a stable output power, you can only find a way from the power generation equipment.

Hydropower stations are a good way to solve this problem.

Li Zhi stood up, looked at Cai Huaishui, and asked, "What is the actual effect?" ”

Cai Huaishui arched his hand and said: "Lord Wang, the accuracy of the machine tool with this stable current is much better than before. ”

As the general manager of Fanjiazhuang State-owned Factory, Cai Huaishui has also seized his spare time to learn various basic knowledge of Fanjiazhuang University over the years. Today, his engineering knowledge is not only about burning glass, but also about electricity and machinery.

In this era, Cai Huaishui can be said to be a person who stands at the top of natural science.

However, with the cultivation of talents at Fanjiazhuang University, there are more and more people like Cai Huaishui whose knowledge level far exceeds the times. After these technical talents go to the post, they can often quickly become the backbone of the business in their industry after being honed by practice.

These business backbones are the reason for the rapid development of Fanjiazhuang's scientific and technological level.

If Fanjiazhuang ten years ago relied on Li Zhi to constantly come up with new inventions, now Fanjiazhuang is a group of engineers working together to climb the peak of science and technology.

"Oh?"

Hearing Cai Huaishui's words, Li Zhi became happy.

The accuracy of the machine tool is a key indicator that directly affects the scientific level of a country.

In the history of later generations, high-precision machine tools have always been the cutting-edge technology tightly held by various countries.

In the eighties of the twentieth century, the Soviet Union was blockaded by Western technology, and the machining accuracy of machine tools always lagged behind the West, and the propeller noise of submarines could not be improved, and the submarines produced were considered to be ten years behind the United States. However, this situation was changed by the high-precision milling machine secretly sold to the Soviet Union by the Japanese company Toshiba.

The technological superiority of American submarines over the Soviet Union was largely wiped out by a few high-precision machine tools. The American sonar, which could have detected a Soviet submarine within 100 kilometers, suddenly became a submarine that had to be detected within 20 kilometers of the submarine.

It can be seen that the precision of machine tools is important to industry and technology.

There are many ways to improve the accuracy of a machine tool, including the material level of the tool and the overall design of the machine. But among these factors, one of the most important is the stability of the power source of the machine tool.

Only a machine tool with a stable power source can have a high degree of stability and be able to control the machining accuracy at a high level.

The initial machine tools, including the first batch of rifling broaching machines and grinding machines manufactured by Li Zhi, are driven by manpower and animal power, and the power of such machine tools is small, the power is unstable, and the low machining accuracy can be imagined.

With the development of Fanjiazhuang technology, subsequent machine tools are driven by steam engines. The steam engine is powerful and stable much more than human and animal power, which is enough for the original machine tool.

However, with the further development of Fanjiazhuang technology, as the machining accuracy reaches the order of one-tenth of a millimeter, even the steam engine is unstable.

Therefore, in recent times, Li Zhi has been organizing the transformation of high-precision machine tools and using electric drive machine tools.

Electricity from thermal power plants is obviously not a good option, while the power generated by hydropower plants is very stable, which has become the last option.

Li Zhi clapped his hands and walked towards the core factory area of the machine tool factory.

These machine tools are the most cutting-edge industrial machine tools in Fanjiazhuang, with strict secrecy facilities, and are used to produce steam engines, rear-loading rifles, rear-loading guns and other military equipment, or to produce other machine tools. Civilian equipment in general is not produced here.

At this time, there was no longer a roaring steam engine in the machine tool factory, but instead there were wires and quiet electric motors. To put it bluntly, the motor is a coil tied to the bearing, and the noise is very small. Driven by electric motors, the machines run efficiently under the control of craftsmen.

The visual improvements brought about by the electric motor are so powerful that the entire machine tool factory looks as if it were a modern factory of the 20th century.

The only reminder to the viewer of this is the seventeenth-century mark, the Ming-style headscarf of the workers in the factory.

Li Zhi turned to Cai Huaishui and asked, "What is our highest machining accuracy now?" ”

Cai Huaishui replied: "Lord Wang, after replacing the motor-driven machine tool, the accuracy has suddenly gone up a big step. Now, if we use a machine tool and a manual combination, our machining accuracy has reached the level of one-twentieth of a millimeter, which is about the thickness of a human hair. ”

Li Zhi nodded and said, "With this precision, we can try to get on the internal combustion engine." ”

Cai Huaishui has long heard Li Zhi talk about the internal combustion engine many times. However, due to the lack of processing accuracy, Li Zhi has never allowed the state-owned factory to trial produce such high-end machinery.

However, the improvement of electric machine tools has made it possible to produce this new type of equipment.

Cai Huaishui arched his hand and said: "As long as the prince draws the design drawing, I will immediately organize craftsmen to conduct research." ”

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