The Application of Silicone Rubber in the Rail Transit Field

In the current era of rapid development of rail transit, ensuring the safe, stable, and comfortable operation of trains is of utmost importance. This cannot be achieved without the support of various high - performance materials, and silicone rubber is an indispensable one. With its excellent performance, silicone rubber plays an important role in multiple key parts of rail transit. In the sealing system of trains, silicone rubber is the core material. When trains are running at high speeds, good sealing is required to resist external wind, rain, dust, and noise. Silicone rubber seals, such as door sealing strips and window sealing strips, have excellent weather resistance and elasticity. They can maintain stable sealing performance under various harsh climatic conditions, including high temperatures, low temperatures, strong winds, and heavy rains. They can effectively prevent rainwater from seeping into the carriage, avoid damage to electrical equipment due to moisture, and at the same time block dust from entering, maintaining a clean environment inside the carriage. Moreover, the elasticity of silicone rubber seals ensures that they always fit tightly under the frequent door - opening and - closing and vibrations of the train, reducing the entry of noise and creating a quiet riding environment for passengers. The shock - absorption and noise - reduction system of trains also relies on silicone rubber. The friction between the wheels and the track and the vibrations generated during train operation will bring noise and discomfort and also cause wear and tear on train components. Silicone rubber shock - absorbing pads and elastic components are widely used in the bogies, suspension systems, and the connection parts between the vehicle body and the track of trains. The good elasticity and damping characteristics of silicone rubber can effectively absorb and disperse vibration energy, reducing the vibrations and noise during train operation. For example, on the bogies of trains, silicone rubber shock - absorbing pads can buffer the impact force between the wheels and the track, protect the components of the bogies, extend their service life, and at the same time improve the running stability of the train, making the journey more comfortable for passengers. In terms of electrical insulation, silicone rubber also plays a key role. There are numerous electrical equipment in rail transit, and the requirements for insulation performance are extremely high. Silicone rubber has excellent electrical insulation performance and can withstand high voltages without being punctured, ensuring the safe operation of electrical equipment. Parts such as cable terminals and insulators often use silicone rubber materials to make insulating protective sleeves. These silicone rubber insulating sleeves can not only provide reliable insulation protection but also have good aging resistance. Even under the long - term action of the electrical environment and the natural environment, they can still maintain stable insulation performance, reducing the probability of electrical failures and ensuring the power supply safety of rail transit. In addition, silicone rubber is also used in the interior materials of rail transit. Parts such as the seats and handrails of trains made of silicone rubber can improve the tactile comfort of passengers. The soft texture and good anti - slip performance of silicone rubber make passengers more comfortable and safe during the ride. At the same time, silicone rubber also has certain flame - retardant properties and meets the fire - safety standards of rail transit interior materials. In case of emergencies such as fires, it can delay the spread of the fire and gain time for the evacuation of passengers. In conclusion, silicone rubber, with its outstanding performance in sealing, shock - absorption, insulation, and interior applications, provides strong support for the safe, stable, and comfortable operation of rail transit. With the continuous progress of rail transit technology, the requirements for the performance of silicone rubber will also become higher and higher. It is believed that silicone rubber will play an even greater role in the rail transit field in the future and promote the development of the industry.


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