On the afternoon of September 18, local time, at the Berlin International Rail Transit Technology Exhibition (InnoTrans 2018) held in Germany, CRRC Sifang Co., Ltd. officially released a new generation of carbon fiber subway vehicles "CETROVO".
           
Chinese Ambassador to Germany Shi Mingde, CRRC President Sun Yongcai, German technical expert Hu Fenbach, CRRC Vice President Wang Jun, and CRRC Sifang General Manager Ma Yun Shuang attended the press conference and jointly pressed the start ball to unveil the new car. This is the global debut of a new generation of carbon fiber metro vehicles. The car is a new generation of subway in my country. It uses a large number of advanced new materials and new technologies to develop. Compared with traditional subways, it has been fully upgraded in terms of energy saving, environmental protection, comfort, and intelligence. It is the latest technological achievement in the field of subway in my country and represents the future subway. The technical trend of trains. Its advent will lead subway vehicles into a more green and intelligent "new era".
           
What does the new generation of subway vehicles look like? What is the "black technology"? What kind of new ride experience will it bring?
1. Using carbon fiber technology, the vehicle "slimming" 13%
Compared with the traditional subway, the biggest feature of the new generation of subway vehicles is lighter and more energy-saving. According to Ding Sansan, a scientist at CRRC and deputy chief engineer of CRRC Sifang Co., Ltd., the new generation of subway vehicles adopts advanced carbon fiber technology, and the car body, bogie frame, driver's cab, equipment cabin and equipment body are all made of carbon fiber composite materials. It is a subway vehicle that uses carbon fiber composite materials on a large scale. In particular, it has successfully broken through key technologies such as structural design and manufacturing of large and complex carbon fiber parts, and has realized the comprehensive application of carbon fiber composite materials in the main load-bearing structures of vehicles such as car bodies, bogie frames, and driver cabs. Carbon fiber enables the vehicle to achieve substantial "slimming". Compared with traditional metal materials such as steel and aluminum alloy, the car body, driver's cab and equipment compartment of the new generation of carbon fiber subway vehicles are reduced by more than 30%, the bogie frame is reduced by 40%, and the whole vehicle is reduced by 13%. It is estimated that the new generation of subway vehicles can be comprehensive energy saving more than 15%.
2. The carriage will be "transformed" and more applicable.
Compared with the traditional subway, the new generation of subway vehicles have stronger applicability, more flexible in operation organization, and can adapt to more complex operating environment.
At present, the subway vehicles in our country are all fixed marshalling, and the number of carriages is immutable. The new generation of subway vehicles has developed the "flexible marshalling" function for the first time. The train takes 2 sections as the minimum marshalling unit, which can realize "2 N" section flexible marshalling according to the operation requirements, match the carriages arbitrarily within the range of 2 to 12 sections, and complete the "transformation" in less than 5 minutes. Ding Sansan told reporters that the tidal change of subway passenger flow is very prominent, with large passenger flow in the morning and evening peak periods and small passenger flow in the flat peak period. It is flexibly grouped according to the change of passenger flow, with large grouping in the peak period and small grouping in the flat peak period. This can realize the most economical operation, save energy consumption, reduce operating costs, increase departure density and improve service level.
Compared with the traditional subway, the new generation of subway vehicles adapt to the harsher climate and geographical environment, and can operate in complex environments such as high temperature and high humidity, -40 ℃ high cold, 2500 meters high altitude and so on. At the same time, in view of the many curves and small radius of the subway line, the vehicle is equipped with an active radial system on the bogie for the first time. When the vehicle enters the curve, it can control the wheelset to drive in the radial position of the curve. This greatly improves the curve passing performance of the train, and can better adapt to small curves. The minimum turning radius can reach 80 meters, far exceeding the traditional subway, and the wheel wear is also greatly reduced, saving maintenance costs. The vehicle can run without external power supply. It is equipped with an energy storage system-a traction battery, which can provide traction power for the vehicle to travel 15 kilometers. When the power supply failure occurs, it can be operated in emergency, and it is also convenient to drive in the "no-power area" of the line and the depot.
3. Run more stable, ride more comfortable
The new generation of subway vehicles adopt advanced vibration and noise reduction technology to make the ride more comfortable. When the train is running, the track irregularity will cause the carriage to vibrate, and the suspension system on the bogie should be used to reduce the vibration. The suspension system of traditional subway is not adjustable and is called passive suspension. The new generation of subway vehicles adopts full active suspension technology for the first time. During driving, when the carriage vibrates, it can be detected immediately, and the damping of the suspension system can be dynamically adjusted, so that the suspension system is always in the best vibration reduction state. Make the subway vehicle "run more stable". The car is also quieter. The noise reduction design is optimized. When the train is running, the noise in the passenger room is only 68 decibels, which is more than 3 decibels lower than that of the traditional subway.
4. Brush video on smart trains and windows
Applying modern intelligent technology, the new generation of subway vehicles is still a highly intelligent "smart train. In the carriage, you will feel the ubiquitous "wisdom service". Carriage into the "touch" era. The window is transformed into a touch display screen and becomes a "magic window" that can convey various graphic and video information ". It is equivalent to a super-large version of "Pad". Passengers can watch news, browse web pages, buy tickets, brush videos, watch live TV, etc. on the window by touching the window with their fingers, and conveniently obtain various services. The mirror in the carriage has become a "magic mirror" that can be touched and connected to the Internet ". The intelligent air conditioner in the carriage can automatically determine the appropriate temperature and humidity according to the weather and clothing index, making the body feel more comfortable. The lighting system can know the light environment of the car at any time and automatically adjust the brightness and color temperature. There are also multimedia curved screens, self-cleaning seats, and hearing aid systems for passengers with hearing disabilities......
The new generation of subway vehicles can run at a maximum speed of 140 kilometers per hour, which is faster than traditional subways. Using unmanned driving technology, the whole process of the train from departure to acceleration and deceleration, stopping, opening and closing doors, and returning to the depot is fully automatic. The use of maintenance is also more intelligent. The vehicle has established a powerful intelligent perception system with more than 1100 monitoring points to sense the "health" status of the train in real time. Automatic warning and remote maintenance are available when an exception occurs during operation. At the same time, with the help of intelligent perception system, it can intervene in maintenance in time when the vehicle is in a "sub-health" state, and can also detect the line condition and guide the line maintenance, so that the train operation is more safe and reliable.
In the next step, a new generation of carbon fiber metro vehicles will undergo type tests and carry out line trial operation.