Recently, China has been on the "world hot search list" again, our high-tech, not only let Japan lose the world's first throne, but also the United States, a major country in science and technology, also secretly poked and poked jealousy, this is praised by the United States as a "dark horse of science and technology" creation, is our China's self-developed maglev train, so what is the difference between this maglev train and high-speed rail bullet train?Why did it cause a sensation in the world?What is the mystery of this research and development that refreshes the perception of foreigners?
Perhaps Chinese people are not unfamiliar with maglev trains. But foreigners for this big guy. That can be described as a novelty, China's maglev train in speed, successfully refreshed their three views, maybe so we think there is nothing to be surprised, don't blame foreigners too ignorant, if you tell you, by our own China developed this maglev train, in the first stage of trial operation, it successfully set a world record, and its speed, more than the flight speed of the aircraft, this is equivalent to saying, in the past we from Shanghai to Beijing may need to spend two hours, on the maglev train, then it may only take half an hour。 Do you think that China's maglev train is really good, and it is no wonder that Americans have to cast envious eyes on our maglev train. What kind of black technology makes our maglev train plugged in with "flying" wings?
In the past, it was at the top of the world record list, is the maglev train created by Japan, it has a speed of 603 kilometers per hour, which also makes the Japanese very proud, and even praised it as the light of Japan's transportation facilities, but it is this light, which was soon surpassed by our country, because the speed of our maglev train in China, the highest has been able to reach 800 kilometers, and this is only our current results, according to reliable sources, scientists are still working hard to improve technology, the future of our maglev train long-term goal is to reach a speed of 1000 per hour 4000 kilometers, it is completely conceivable that if one day maglev trains are rolled out across the country, then there will be a large number of high-speed rail and plane passengers, choosing maglev trains as their mode of travel.
Then some friends may have doubts, what is the working principle of this maglev train?Why is it that you can run faster on the ground than you can in the sky?In many popular science articles, bloggers like to use "same pole repulsion" to explain the floating of the maglev train, in professional terms, that is, to install a magnet with the same magnetic pole between the train and the track, then according to the scientific knowledge we have learned, it can be very simple to speculate that the repulsion force will occur under the action of the same magnetic pole, then the train above will float. So is there any scientific truth to this statement?Here's a quick clarification. The reason why the maglev train can float up is not simply because of the repulsion of the same level, but also the attraction of different poles, so what is the working principle of the latter method?
When the maglev train works, it will be driven by the magnetic force generated by the different poles to promote the work of the maglev train, and the maglev train is not like the high-speed rail, which works along the track, because the magnetic force is sometimes unstable, so the magnetic force of the electromagnetic levitation must be constantly adjusted in order to maintain normal operation.
Now the first place in the world maglev train is our country, so the first person in the world to invent the maglev train is also Chinese?Not really. The world's first maglev train originated in Germany, in 1922, scientists discovered the principle of electromagnetic levitation and immediately applied for a patent, at that time most countries because the economy is not developed enough, the construction of maglev trains, need to consume a lot of manpower, material and financial resources, so it did not attract people's attention at that time, this is not in vain, we Shanghai maglev train total length is 30 kilometers, a total of tens of billions of yuan was spent, which is not the average country can afford.
Until a few decades later, with the increase of the economic level, coupled with the immaturity of the maglev train from the beginning of research and development, to the later slow improvement, the speed and performance are getting better and better, the maglev train began to be welcomed by many countries, so what kind of advantages does the maglev train have, can cause the favor of all countries? ?The advantages are as follows, the first is the speed, which has just been said, so I will not repeat it, which also reflects the high efficiency of the maglev train. The second point is that the maglev train and the high-speed rail EMU are not the same, in the assembly process do not use piston and turbine and other moving parts, this is actually a major breakthrough of the maglev train, without moving parts, and the maglev train is the use of electromagnetic force, to achieve the wheels and tracks without contact support and guidance, its running resistance is only air resistance, that is to say, the maglev train will not produce any noise in the process of work, generally speaking, residents are particularly afraid of living in the high-speed rail EMU Next to the airport, because these means of transportation in the process of coming and going, the wheels and the track friction will produce a lot of noise, the above are the advantages of the maglev train, but its only drawback, is that the cost is too expensive, now many countries that build maglev trains, in fact, have not made a profit from it, but are in a state of loss.
Although the maglev train is indeed expensive, but it is really easy to use people, from the end of the last century, the powerful countries have begun to implement the research and development of maglev trains, before the rise of our country, the world's maglev train technology is the most mature is Japan and Germany, Germany's maglev train is the best in the world, there is no doubt about it, after all, people are top students, so what technology does Japan rely on, can compete with Germany?
Japan is really not a simple country. Not to mention anything else, their scientific and technological strength is indeed obvious to all, Japan used low-temperature superconducting magnetic levitation technology before, just look at the name of you do not think it is a little abstract, low-temperature superconducting magnetic levitation technology, in fact, the use of superconductors, by making metals or alloys and other materials at low temperatures, completely lose their resistance and complete diamagnetism, so that superconductors and magnets are mutually exclusive or attract, so that the magnet can float on the superconductor. Of course, Japan does not only use the characteristics of superconductors, they also use superconducting coils to make the train float easily, in addition, Japan has also invested heavily in each carriage, have installed a liquid nitrogen compression refrigerator, as the name suggests, the refrigerant can make the maglev device always maintain low temperature, and then use the principle of repulsion of the same pole we just said, to ensure that the maglev train in the process of operation, between the car body and the track can be guaranteed to be accurate to ten millimeters, Japan is the use of the above two characteristics, so that the maglev train can"Grow wings" and "fly" at high speed
Then some friends will be curious, since the speed of our maglev train has surpassed Japan, then our technology must also surpass Japan, so what is the mystery of our maglev train?Like Japan, we use superconducting materials, and the current generated by the maglev train when it is working can be cycled without resistance inside the superconducting material, and a super magnetic field and diamagnetism will be generated between the cycles, of course, this is not unusual, and it can also be said to be the basis for the operation of all maglev trains. It is worth mentioning that we use high temperature on the maglev train, the high temperature here is not the ultra-high temperature we recognize in life, but refers to the temperature of the maglev train in the superconducting phenomenon, for example, when the maglev train is running, some chemical elements will be produced, and it may disappear when it is at a fixed temperature, and the temperature here refers to the ultra-high temperature, but the high temperature here is not static, and the temperature of different materials into superconductors is completely different, for example, mercury is more than minus 200 degrees, the superconductor phenomenon will appear, and copper oxide only needs to reach minus 169 degrees, you can have superconductivity, so you will find that in fact, the phenomenon of superconductors is very different.
So what does this superconductor have to do with the maglev train developed in China?It turns out that our scientists have conducted a detailed survey and installed a high-temperature superconductor under the maglev train, which will produce strong diamagnetism during the operation of the train, and then use the magnetic track to achieve the effect of maglev.
According to the above analysis, our maglev train not only surpasses Japan in speed, but also our cost is far lower than Japan, before we have to look at the face of Japan, the United States and other countries, now our maglev train has been in the forefront of the world, it can be regarded as finally fighting for a breath, so what do you think about our maglev train?Welcome to leave a comment and let us know.