At present, China is running and construction of high-speed railway mileage has more than 10,000 km. By 2011, the world's longest built a line mileage, the highest technical standards of the Beijing-Shanghai high-speed railway is expected to open to traffic. December 3, 2010, the Beijing-Shanghai high-speed rail in the joint test and comprehensive test, the new generation of high-speed EMU reached a top speed of 486.1 km, once again set the world record speed of rail operations. However, Chinese scientists have not slowed down the pace of development of higher speed trains. At present, the Southwest Jiaotong University traction power of the State Key Laboratory of the experimental group is actively developing high-speed vacuum pipe traffic. In the next two to three years, the laboratory will launch a speed of 600 ~ 1000 km vacuum magnetic levitation train experimental model, 10 years after the operation may be. According to the current theoretical study, the highest speed of this train can reach 20,000 km.
What is the vacuum maglev train
As we all know, today, whether ordinary or high-speed train trains, their mode of operation are all wheel-rail system. In the atmospheric environment due to subject to energy consumption, noise and other factors, the actual speed of the train is usually not more than 400 km. In order to create a higher speed train, scientists have proposed a vacuum pipe high-speed traffic train new technology. Its working principle is the construction of a pipeline with external air isolation, the internal pumping vacuum, in which the operation of maglev train. Because the magnetic levitation train is running without the friction of the wheel-rail system, the air resistance is also much smaller, so it can achieve amazing high-speed, and, with the external air isolated sealed pipe, in the desert, plateau, mountain , Rivers and lakes, seabed and harsh weather conditions normal operation.
Although the vacuum maglev train in a vacuum environment to run, but the train inside the car is certainly not a vacuum. Good air tightness of the train structure to ensure that the train compartment and other trains filled with fresh air, passengers take the vacuum maglev train will not have dizziness, chest tightness and other strange feeling. From the construction cost point of view, the current high-speed railway tunnel line cost is about 150 million yuan per kilometer, the tunnel section height is about 6 to 8 meters, while the vacuum magnetic levitation train using the pipe section height of only 4 to 5 meters, Can save a lot of material and construction costs. As a result, the cost savings associated with the reduction in the cross-section of the pipeline compared to the high-speed rail are expected to balance the increased construction costs associated with increased vacuum piping, vacuum equipment and the like.
Behind the scenes of a vacuum maglev train
In fact, the concept of vacuum pipe traffic is not a new concept. As early as the 1960s, the United States Rand consultants and MIT experts put forward the concept of vacuum pipeline maglev transport. However, until the end of the 20th century people began to pay attention to this new type of rail transport. In 1999, the United States of America Florida mechanical engineer Dai Rui Auster will vacuum tube maglev transport concept into a set of design drawings, and the United States Patent Office for the invention patent. In 2001, a scientific and technical personnel of the China National Foreign Trade Transportation Corporation (CTIG) found information on Oersted's vacuum pipeline maglev transportation technology on the Internet in order to solve the most critical traffic technology problem of fast and safe transportation and logistics. Through the full exchange with Oster, he decided to introduce this technology to the country.
In early 2002, the scientific and technical personnel linked to the Southwest Jiaotong University, vehicle dynamics and magnetic levitation and other professional experts. They are more than 10 months of intense planning and active preparation, and ultimately in the Southwest Jiaotong University set up a vacuum tube transport Institute was named the research institutions, and invited to join Oster to jointly carry out vacuum pipeline transportation research and experimental work . After more than four years of active efforts, the researchers for three consecutive times to the relevant departments to apply for the National Natural Science Foundation, and finally in 2007 received 260,000 yuan of project funds for the study and test vacuum pipeline laid the foundation.
China's technical program is better than abroad
At present, only the United States, Switzerland and China, three countries are under way vacuum tube magnetic levitation technology of scientific research. Among them, the US technology program is the use of high vacuum pipeline transportation, the pipeline in the atmospheric pressure is only one millionth of the outside air. This program is not only very high construction costs, and the implementation of technical difficulty is also great, so the real need to put into practical operation is not an easy task. Switzerland's technical program is to set the vacuum pipeline in the underground tunnel, this approach will also increase the additional construction costs, in the specific implementation of the practical problems to overcome many practical problems. In fact, both the United States or Switzerland, their technical solutions are still in the theoretical research and exploration stage.
Compared with the United States, Switzerland, China's technical advantages of the vacuum magnetic levitation train more obvious, the most important point is reflected in the vacuum on the pipeline. At present, the pressure in the vacuum pipeline being tested is 0.5 atm, which can reduce the resistance of the air to the train running, so that the train speed reaches 1000 kilometers per hour. According to experts, the train speed of 1000 km or a conservative figure, the next goal will train the speed mentioned 4000 km or higher. The current test results, all the construction of vacuum magnetic levitation train equipment are readily available, the technology involved has also been achieved commercial applications, the only work to be done is to build a national-level co-ordination of experimental lines, and conduct Unified scheduling integration can be. This shows that the development program is not only technically easy to achieve, but also can greatly reduce the construction cost.
End of the World close to show a bright future
Today, people's high-speed remote passenger transport mainly to the main airliner, the flight speed of about 1000 km / h. However, for more than 5,000 km of long-distance travel, not only people to spend time and economic costs are quite alarming, but also caused serious environmental pollution, energy crisis and the continuous air crash more people reflect on what should be used "Safe, high-speed, economic, environmental protection" means of transport.
At present, including cars, high-speed trains, maglev trains, etc., any kind of ground transportation, the commercial operation speed should not exceed 400 km / h. Otherwise, not only the energy consumption, excessive noise, and its security, comfort is also difficult to be guaranteed. In fact, all this is due to traffic in the dense atmosphere caused by traveling. Therefore, as a new generation of vacuum maglev train is undoubtedly a cheap choice. Its unit energy consumption is less than one-tenth of the aircraft passenger aircraft, and its noise, exhaust pollution and accident rate is almost close to zero, which is fully in line with the new era of the 21st century people on the ground high-speed traffic standards, Traffic may reach ultra-high-speed technology approach. Even more surprising is that if the magnetic levitation train to implement further technical improvements to overcome the very high-speed operation of some of the obstacles, the limit speed of 20,000 km / hour is not impossible to achieve.
At present, the development of China's vacuum maglev train will be divided into four stages gradually. At this stage in addition to technical feasibility studies have been completed, will be carried out an economic feasibility assessment. Once the cost of construction and maintenance costs can be controlled to an acceptable level, by 2020 will be expected to achieve the test run target, in 2030 will reach the level of promotion operations. By then, people will enjoy the world's most advanced vacuum maglev train this high-tech achievements, from Beijing to Guangzhou, 2,300 km away, do not fly the same as long as 2.5 hours or 1 hour to reach the destination. In the future, people can even dream of a few hours to complete the global travel.
Category: Industry News