President Meng smiled faintly, "In the future, you will know that you can't be regarded as a China expert, you not only have to understand the Great Qing Kingdom, but also know more about the countries around the Great Qing Dynasty, so that you can be regarded as a China expert." ”President Meng's tricky words made Li Xiande stunned for a moment, and nodded, "After listening to Mr.
Yue Meng's words, I really have a lot of knowledge, I should be careful when dealing with the Japanese in the future." ”In fact, Li Xiande specially mentioned the Japanese to Xuan Yuemeng, but he deliberately wanted Xuan Yuemeng to know that he stepped on two boats, and he was not the only choice for Xuan Yuemeng.In the afternoon, President Meng and Li Xiande had dinner and did not change his plans, he expected to leave for Washington in two days.After meeting with Xuan Yuewu, President Meng listened to Xuan Yuewu's work report for more than a month, in general, it was satisfactory to Xuan Yuemeng, Xuan Yuewu was tired enough for more than a month, and President Meng was the same, several people have not rested.President Meng told the stationmaster of the Americas station about the concept of Chinatown and Chinatown primary and secondary schools, and the overall planning of the Americas station was even if it entered the planning period in advance.This trivial matter does not need to be asked by President Meng, for running primary and secondary schools, this is the United States, as long as you are willing to pay, teachers are not a problem, and at the same time, it can also support the development of education in Danzhou, and when the time comes, you can send a large number of primary and secondary school educators As for universities and higher scientist levels, President Meng spends more energy.He is to take care personally.Nikola Tesla, Serbian-American inventor, physicist, mechanical engineer, electrical engineer.He is considered an important promoter of the commercialization of electricity and is best known for his design of modern alternating current systems.However, this new type of power generation idea has not been paid attention to by the United States, and now DC generators are still dominant. ”Xuan Yuewu introduced to President Meng.President Meng is very interested, DC generator is a machine that converts mechanical energy into DC electrical energy.It is mainly used as a DC motor required for DC motors, electrolysis, electroplating, electrometallurgy, charging and excitation of alternators.Although in places where direct current is needed, electric rectifier components are also used to turn alternating current into direct current, but from the perspective of ease of use, reliability of operation and some working performance, DC motors cannot be compared with alternators.The generator was first produced in the second industrial revolution period, was made by the German engineer Siemens in 1866, it is driven by a water turbine, steam turbine, diesel engine or other power machinery, the water flow, air flow, fuel combustion or nuclear fission energy into function to the generator, and then converted by the generator into electricity.Electricity is one of the most important sources of energy in modern society.Although there are a variety of generators, they all work on the same principle and are based on the laws of electromagnetic force and induction.Therefore, the general principle of generator construction is to use appropriate conductive materials and magnetic permeability to form circuits and magnetic circuits that carry out electromagnetic induction with each other, so as to generate electromagnetic power, so as to achieve the purpose of energy conversion.In 1831 A.D., Faraday passed a wire in a closed circuit through an electromagnetic field, and the wire rotated to flow through the wire, so Faraday realized that there was a close connection between electricity and magnetic fields, and he built the first prototype generator, which included a copper disc that rotated in a magnetic field, which generated electricity.Until now, all electricity was generated by electrostatic machines and batteries, neither of which could generate significant power.However, Faraday's generator finally changed everything.In 1832, the Frenchman Bixie invented the hand-cranked DC generator, the principle of which is to generate an induced electromotive force in the coil by rotating the permanent magnet to change the magnetic flux, and output this electromotive force in the form of DC voltage.In 1866, Siemens of Germany invented the self-excited DC generator.In 1869, Graham of Belgium made the ring armature and invented the ring armature generator.This type of generator uses water power to turn the rotor of the generator.Because the construction of medium-sized power plants has been carried out in Tianjin, President Meng has always been very concerned about power generation, which is the watershed between modern technology and modern technology.Now the mainstream of power generation in the United States is the DC generator, Edison is great, but in the process of scientific and technological progress, this great inventor has also stood in the position of blocking progress many times.Tesla was determined to develop AC motors when he was in Edison, but because Edison insisted on only engaging in DC methods, he was not interested in Tesla's new power generation ideas, or felt that it was challenging his scientific research direction, and began to suppress it.After listening to Xuan Yuewu's introduction to Nikola Tesla's situation, President Meng was very happy and felt that this was a good opportunity, in fact, the debate between DC and AC will continue for more than ten years, which seriously hinders the development speed of AC power, but President Meng is through the public, of course, he knows that the future power generation is all AC power, and only AC is the right way.In the general direction, President Meng does not have to take the wrong path.Nikola Tesla is a Serbian-American inventor, physicist, mechanical engineer, and electrical engineer.He is considered an important promoter of the commercialization of electricity and is best known for his design of modern alternating current systems.On the basis of the electromagnetic field theory discovered by Michael Faraday, Tesla has a number of revolutionary inventions in the field of electromagnetic fields.His numerous patents and theoretical work in electromagnetism are the cornerstones of modern wireless communication and radio.President Meng met Nikola Tesla for the first time, because he was not supported by funds and was not allowed by the mainstream scientific research direction of this era, so Professor Nikola Tesla's work was stagnant and his living conditions were not good.President Meng got straight to the point, and proposed to Nikola Tesla to go to Danzhou, and the condition was to help him create an academy of sciences, and the annual salary was 20,000 US dollars a year, Professor Nikola Tesla was stunned by President Meng, not only money, but the price offered by President Meng, which made it almost impossible to refuse, mainly because President Meng thought that AC power would become the mainstream in the future, and the idea that President Meng would become the mainstream moved Nikola Tesla, in the face of President Meng's huge financial resources and the grace of knowledge, Nikola Tesla thought for a few minutes, He decided to go to Danzhou Meng President Daxi with his family, which was the first harvest in science and technology talents after he came to the United States, and he even believed that this harvest was greater than the value of American knives and gold worth 260 million Chinese official silver, and technology represented the future.Professor Nikola Tesla introduced his research direction to President Meng in detail.President Meng is still very interested in industry and science and technology, if it were not for the heavy responsibility of the development of the whole country, history pushed him to the position of leader, President Meng is willing to be a scientific research worker, quite challenging, but also very satisfying.Under the personal demonstration of Professor Nikola Tesla, President Meng picked up a lot of university knowledge, although in this era, ordinary modern engineering students, modern engineering students are still only college students in Professor Nikola Tesla, and they cannot be surpassed.People are doing research and development in the process of starting from scratch, these are fairy-level characters, and President Meng admires the most that the scientist generator is mainly composed of rotors, stators, brushes, end covers and bearings and other components.President Meng listened to Professor Nikola Tesla's explanation and disassembled the equipment himself.Professor Nikola Tesla saw that Xuan Yuemeng actually disassembled it decently, "Mr.
Yuemeng, you know how to mechanical" President Meng smiled: "We also have generators in Danzhou, and we have run power plants in Tianjin, but we can't adapt to large-scale power supply" Professor Nikola Tesla nodded: "Once my AC power generation is successful, it will be able to adapt to large-scale power supply needs" The stator is composed of a stator core, a base, a wire-wrapped winding, and other structural parts that fix these components.The rotor is composed of rotor poles, rotor cores, slip rings, shafts and fans.The generator current is generated by connecting and assembling the stator and rotor of the generator through the bearing, base and end cover, so that the rotor rotates in the stator, and a certain excitation current is introduced through the slip ring, so that the rotor becomes a rotating magnetic field, and the stator coil does the movement of cutting magnetic field lines, thereby generating an induced potential.It is led out through the terminal block and connected to the circuit, so that an electric current is generated.Because there is a break in the connection between the brush and the rotor, the rotor rotates in a certain direction to produce alternating current, referred to as alternating current.A steam turbine generator is a generator for a steam turbine.In order to obtain high efficiency, the steam turbine is generally made at high speed, usually 3000 rpm with a frequency of 50Hz or 3600 rpm with a frequency of 60Hz.In order to reduce the mechanical stress caused by centrifugal force and reduce the wind friction consumption of high-speed turbine generators, the rotor normally adopts a slender rotor.Especially in high-capacity high-speed units above 3000 rpm, due to the relationship between material strength, the rotor diameter is strictly limited, and generally cannot exceed 12 meters.The length of the rotor body is limited by the critical speed.When the length of the body reaches more than 6 times the diameter, the second critical speed of the rotor will be close to the operating speed of the motor, and large vibrations may occur during operation.Therefore, the size of the rotor of large high-speed turbine generators is strictly limited.Depending on the form of energy, different generators can be made.Using water resources and water turbines, it can be made into hydro turbine generators; Due to the different reservoir capacity and head drop, it can be made into hydro turbine generators with different capacities and speeds.Using coal, oil and other resources, and boilers, turbine steam engines, can be made into steam turbine generators, which are mostly high-speed motors.In addition, there are various types of generators that use energy such as wind, atomic, geothermal, and tidal energy.Diesel generator set is a generator driven by an internal combustion engine fueled by diesel, which starts quickly and is easy to operate, but the cost of internal combustion engine power generation is high.Diesel generator sets are generally used as emergency backup power supply, or mobile power stations and some areas where large power grids have not yet arrived.The speed of diesel generator is generally 1500 rpm, and it is relatively simple to manufacture.Therefore, the structural components of diesel generators, especially the rotating shafts, should have sufficient strength and rigidity to prevent these components from breaking due to vibration.In addition, in order to prevent the uneven angular velocity of the generator due to torque ripple, the voltage fluctuation will be caused and the light will flicker.The rotor of the diesel generator is also required to have a large moment of inertia, and the natural torsional vibration frequency of the shaft system should be more than 20 different from the frequency of any alternating component in the torque ripple of the diesel engine, so as to avoid resonance and cause shaft breaking accidents.Of course, these are just the research directions of Professor Nikola Tesla.President Meng was pleasantly surprised: "You have a lot of time and sufficient funds to research, Professor Nikola Tesla, I will fully support you."
High technology drives the development of science and technology as a whole, and I am more excited to get you than to get ten infantry divisions. ”"Your evaluation is too high, Mr.
Yue Meng, do you really think that the project I am studying is high-tech" Nikola Tesla looked at this two-year-old rich man in amazement, the scientist's ability to accept it is relatively strong, and he did not be surprised by President Meng for a long time like ordinary people.President Meng smiled slightly, "Of course, history will prove that my vision is not wrong" t1706231537: