In recent years, with the rapid development of China’s railway and urban rail transit markets, as well as the accelerated promotion and application of new materials, new technologies and new processes, the development of China’s rail transit equipment manufacturing industry is advancing by leaps and bounds, and composite materials are becoming irreplaceable advanced rail transit equipment. The universal component. In 2015, the State Council issued the "Made in China 2025", the first ten-year action plan for the manufacturing powerhouse strategy, which clearly listed advanced rail transit equipment as one of the ten key breakthrough areas.
The development of advanced rail transit equipment characterized by safety, reliability, advanced maturity, energy conservation and environmental protection is moving towards green, smart, and genealogical products. The application of new materials, new technologies and new processes has become an important basic support.
Composite materials help improve train comfort
Lightweight trains, environmental protection, and comfort are the eternal development themes of advanced rail transit equipment. As a new material with excellent comprehensive performance, composite material is a combination of matrix material and reinforcement. It has the advantages of light weight, high strength and high rigidity, which can reduce the weight of rail transit trains, reduce noise and vibration, and improve safety. Performance, comfort, and maintenance reduction all play important roles, and they play an inestimable role in promoting the transformation and upgrading of the rail transit equipment manufacturing industry and achieving a manufacturing powerhouse.
At present, composite materials are becoming an irreplaceable general component of advanced rail transit equipment, and have been widely used in many parts of rail transit trains, including decorative parts such as train decoration panels, grilles, nameplates, and assembly parts such as doors, toilets, and seats. , As well as main bearing parts and key components such as bogies, car bodies, brake shoes, and gear boxes.
Optimal design is the basis of composite material application and the guarantee of weight reduction and safety. Composite functional materials have heat insulation, sound insulation, light weight, high damping, super hydrophobic, anti-condensation, environmental friendliness, etc., and have excellent performance in realizing vehicle lightweight, vibration reduction, noise reduction, and fire prevention.
Composite functional materials have been successfully applied to rail transit aluminum alloy car body profiles, corrugated sheets, cab covers, air duct assembly, car door panels, window panels and other spraying links, achieving the effects of heat and sound insulation of trains. Thermal insulation performance is an important factor affecting the comfort of trains and vehicles. Composite functional materials based on inorganic thermal insulation materials with nano-scale microporous structures have excellent thermal insulation and anti-condensation effects, which solves the problem of applying thermal insulation substrates to Fibers or felts are easy to fall off during use, and products with different parameters can be independently deployed according to application scenarios. In the actual thermal insulation test comparison, as the material thickness increases, the heat transfer rate will be lower, and it will take longer to reach the same temperature, which will produce a better thermal insulation effect.
Composite materials escort the safety of trains
Although the future development direction of rail transit trains is comprehensive comfort, intelligence, energy saving and environmental protection, it is undeniable that ensuring the safe operation of rail transit vehicles is the constant theme of the industry. With the large-scale application of composite materials in rail transit trains, higher and higher requirements are put forward for the smoke-free and flame-retardant properties of composite materials.
Composite functional materials can be widely used in the body, interior panels, pantographs, cabs, doors and windows, and electrical cabinets of rail transit vehicles such as EMUs, high-speed rails, subways and intercity vehicles. Anti-condensation, anti-corrosion and damping, etc., such as the fire protection of the car body structure above important electrical components such as the undercar traction transformer, the fire protection of the car body part under the pantograph, the heat insulation and anti-corrosion of special-shaped pipes and valves. In many projects of supporting manufacturers' fire and flame retardant tests, composite functional materials were used for spraying on car door panels, which achieved good results and received great attention.
The composite functional material scheme adopts the most optimized and reasonable construction scheme, four different thermal conductivity materials, and the material formula can be adjusted according to user needs. It can not only solve modular weight reduction, lower system cost, improve service life, design innovation, etc. The demands of this aspect can also save costs and improve the efficiency of construction operations.
At present, composite materials are ubiquitous in rail transportation equipment and become one of the irreplaceable new materials. With the development of high-speed, lightweight, comfortable and safe trains, composite materials will play more and more The more important the role. In line with the new development direction of the high-end manufacturing field of rail transit, the industry should seize the opportunity, strive to digest and absorb advanced technology, improve the application level of composite materials in rail transit trains, improve process technology, and promote the sustainable development of rail transit.