China National Railway Corporation launches a new generation of carbon fiber subway vehicles, full of "black technology"

At InnoTrans 2018 in Berlin, Germany, China National Railways officially launched the new generation of carbon fiber metro vehicles "CETROVO".

At 14:00 p.m. local time, the launch of the new generation of carbon fiber subway vehicles will take place.

Chinese Ambassador to Germany Shi Mingde, President of CMC Sun Yongcai, German technical expert Hu Fenbach, Vice President of CMC Wang Jun and General Manager of CMC Sifang AG Ma Yunshuang attended the conference and jointly pressed the starting ball to unveil the new vehicle. 

What does the new generation of subway cars look like? What's the "black technology"? What kind of new ride will it bring?

I. The use of carbon fiber technology, the whole vehicle "slimmed down" by 13%

Compared to the traditional subway, the biggest feature of the new generation of subway vehicles is that they are lighter and more energy efficient.

Lightweighting, i.e. reducing one's own weight as much as possible, is a major way for subway vehicles to achieve energy savings. As a new material, carbon fiber composites are known as the "king of lightweighting", and their light weight and high strength provide an excellent solution for lightweighting trains.

According to Ding Sanzan, a scientist and deputy chief engineer of China National Railway Corporation (CNRC), the new generation of subway vehicles adopts advanced carbon fiber technology. The body, bogie frame, driver's compartment, equipment compartment and equipment body are all made of carbon fiber composite material, which is a large-scale application of carbon fiber composite material. In particular, the company has successfully broken through key technologies such as the design and manufacturing of large complex carbon fiber parts, and realized the full application of carbon fiber composite materials in the main load-bearing structure of the vehicle body, bogie frame, driver's room and other vehicles.

Compared with the use of steel, aluminum alloy and other traditional metal materials, the body, driver's room and equipment compartment of the new generation of carbon fiber subway cars have been reduced by more than 30%, the bogie frame has been reduced by 40% and the whole car has been reduced by 13%.

"Although higher in manufacturing costs than traditional metal materials, carbon fiber composites are more lightweight, have obvious energy-saving advantages, and have excellent fatigue, weather and corrosion resistance, which can effectively ensure that trains do not fail during the 30-year service period, such as fatigue, corrosion, etc., reducing the amount of maintenance and therefore reducing the full life cycle costs." The lighter body also reduces damage to the lines, Ding said.

In order to reduce energy consumption, the new generation of subway vehicles is equipped with a new energy-efficient traction system in addition to carbon fiber lightweighting technology. Upgraded from the traditional asynchronous motor of the subway to the permanent magnet synchronous motor direct drive technology, and the use of silicon carbide variable current device, greatly improving the vehicle's traction efficiency.

It is estimated that the new generation of subway vehicles can save more than 15% energy.

Ⅱ. the car will be "transformed", more suitable

Compared to traditional subways, the new generation of subway vehicles have greater suitability, are more flexible in their operational organization, and can adapt to more complex operating environments.

At present, China's subway cars are fixed groupings, and the number of car sections is immutable. For the first time in the new generation of subway cars, the "flexible grouping" function has been developed. With the smallest grouping unit of two cars, trains can be flexibly grouped into "2+N" cars according to operational needs, and the "transformation" can be done in less than five minutes.

The tides of the metro's passenger flow are very prominent, with a large passenger flow in the morning and evening peak periods and a small passenger flow in the flat peak periods, and flexible grouping according to changes in passenger flow.

The new generation of subway cars use advanced vibration and noise reduction technology for a more comfortable ride.

When the train is running, the unevenness of the track can cause the carriage to vibrate, which is damped by the suspension system on the bogie. Traditional subway suspension systems are not adjustable and are called passive suspension.

The new generation of subway vehicles use full active suspension technology for the first time, when the car on the way, when the car produces vibration, can immediately detect, and dynamic adjustment of the suspension system damping, so that the suspension system at all times in the best vibration damping state, so that the subway vehicles "run more stable".

It was also quieter inside the carriage. Optimized noise reduction design, when the train is running, the noise in the living room is only 68 decibels, which is more than 3 decibels lower than traditional subway.

According to Ding, just like the high-speed train, the new generation of subway cars have also been designed with airtightness, and for the first time, the body is sealed so that passengers will not feel pressure on their eardrums due to pressure fluctuations inside the car.

Ⅲ.Smart trains with video swiping on the windows

Applying modern intelligent technology, the new generation of subway vehicles is also a highly intelligent "smart train". You will feel the ubiquitous "intelligent service" in your car.

The carriage entered the "touch" era. The car window is transformed into a touch screen and becomes a "magic window" that can convey various graphic and video information. It is equivalent to a large version of "Pad", passengers only need to touch the car window with their fingers, they can watch the news, browse the web, buy tickets, swipe the video, watch live TV, etc. on the car window, convenient access to various services.

The mirror in the car becomes a "magic mirror" that can be touched and connected to the

 Internet.The car's intelligent air conditioning automatically determines the appropriate temperature and humidity based on the weather and dressing index for a more comfortable body.

The lighting system is always aware of the light environment in the car and automatically adjusts the brightness and color temperature.

There are also multimedia curved screens, self-cleaning seats, a hearing aid system for passengers with hearing disabilities....

An intelligent passenger service system that will bring a new ride experience. 

CR: gongyetoutiao.com