The biggest highlight of the sixth speed increase is that the "Harmony" domestic EMU with a speed of 200 kilometers per hour and above has been put into use in the existing speed-up trunk line of the railway.
Traditional passenger trains consist of locomotives and several unpowered passenger cars. EMU is a decentralized EMU, a passenger train with its own power, which can travel in both directions. It has the advantages of advanced technology, safety and reliability, comfortable ride, mature economy and environmental protection, and the speed level is 200 to 250 km/h. EMU can run in short groups of 8 cars, and can also be easily reassembled into 16 car length groups. The varieties of EMU include first-class car, second-class car, dining car and combination car, with short marshalling capacity of more than 600 people and long marshalling capacity of more than 1200 people.
In the sixth large-scale speed increase, China Railway actively promoted original innovation, integrated innovation and introduction, digestion, absorption and re-innovation with the goal of mastering core technologies, and achieved 26 technological innovations in eight aspects, basically mastered complete sets of technologies for speed increase and transformation of existing lines with a speed of 200 kilometers per hour and above, and some technologies reached the world advanced level. While carrying out large-scale transformation and technological innovation on the lines, bridges, culverts, tunnels, communication signals, traction power supply, dispatching and command of speed-up trunk lines; According to the general idea of "introducing advanced technology, joint design and production, and building China brand", the advanced technology of foreign EMUs is introduced, digested and absorbed, and then innovated to produce domestic EMUs with a speed of 200 kilometers per hour and above, and the localization rate of EMUs reaches over 70%.
Main features of EMU:
First, advanced technology. EMU is designed and manufactured according to international common and advanced standards. Streamlined front, smooth drum-shaped section car body and high-speed bolster-free bogie make it have excellent high-speed running quality; The lightweight aluminum alloy or stainless steel car body greatly reduces the weight of the car body and has remarkable energy-saving effect. Mature high-power AC drive technology and the most advanced components in the world make it highly reliable; Advanced computer network control technology can realize the control of each system of EMU, monitor and diagnose the system at the same time, and communicate with the ground to realize the monitoring of EMU on the ground. EMU equipment adopts modular structure, and most faults only need to be replaced or partially repaired.
Second, it is safe and reliable. EMU adopts high-strength aluminum alloy and stainless steel car body to ensure the safety of the whole vehicle. Large-capacity close-fitting coupler buffer device can effectively buffer all kinds of impact energy. The perfect train network control system is convenient for information management and has self-diagnosis function. Complete fault-oriented safety measures are set for important systems and components related to the safety of EMU, which improves the safety of EMU operation without human intervention. Advanced automatic train protection system and equipment are convenient for drivers to operate EMU according to relevant signals. In case of abnormal conditions, the EMU can also automatically slow down or stop to ensure transportation safety. Non-metallic materials selected for EMU are strictly implemented in accordance with international fire protection standards, and important facilities have fire protection measures. The advanced fire alarm system ensures that the EMU can leave the area unsuitable for parking in case of fire. The fire protection design at both ends of the carriage ensures that the fire will not spread to adjacent carriages within 15 minutes.
The third is comfortable riding. EMU fully embodies the people-oriented concept. EMU adopts advanced and mature high-speed bogies with stable high-speed running performance. Adopt automatic constant temperature air conditioning system to ensure that the temperature and humidity in the carriage are adjusted within a constant range. Adopt a closed car body structure and set up a series of sound insulation and noise reduction measures to effectively reduce the noise inside the car. The sealing performance of the windshield is better, which greatly improves the sound and heat insulation performance of the vehicle. The automatic pressure protection device prevents the air pressure fluctuation generated when the EMU meets at high speed or enters the tunnel from affecting passengers' ride comfort. The emergency ventilation function can ensure emergency ventilation for two hours when the high voltage system of EMU is cut off.
The carriage is more spacious than the ordinary train. The carriages are all electric doors, and the noise is low when opening and closing, so passengers can easily pass through the carriages. The seats in the carriage are all soft seats, and the width and inclination can be adjusted at will. As long as the pedal under the chair is lightly pressed, the chair can rotate and turn around, so that the direction faced by passengers is always consistent with the running direction of the train, and the dizziness of passengers when the train runs at high speed is avoided. There is a foldable coffee table in the armrest of the seat, which is convenient for writing or putting things. The window glass made of special materials will not scratch hands and feet even if it is broken after being attacked by near-earth objects such as birds and gravel. The EMU is equipped with a lounge bar, which can provide fast food and various drinks. Some EMU roofs are equipped with LCD TVs and passenger information systems, which can provide passengers with information display inside and outside the car and realize the call between cars. The bathroom of EMU has induction faucet and hot and cold water supply, and the toilet seat can control the temperature through induction.
EMU takes care of the special requirements of passengers. The floor of EMU is seamlessly connected with the platform, and disabled people can get on and off with the help of wheelchairs and other auxiliary equipment. The car is convenient for the disabled and the door is double-decked. The pedal is cancelled in the disabled seat, and a fixing belt and a safety belt are added. The car is equipped with a disabled toilet and a baby toilet. There is also a multi-function hall next to the first-class carriage, which provides a relatively relaxed and closed environment for sick passengers and lactating women.
The fourth is health and environmental protection. Interior decoration and chemical materials meet the requirements of domestic and foreign environmental protection laws and regulations; Centralized collection and discharge of toilet garbage will not cause any pollution along the line; The noise outside the car is low, which reduces the noise pollution to the environment.
Wonderful EMU (Figure)
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