Can ball bearings be used in the bearing system of subways?

Ball bearings can be used in subway bearing systems, especially in components that require efficient and stable operation. The specific application advantages and considerations are as follows:
1. High load bearing capacity
The bearings in the subway system need to withstand enormous loads, including the weight of trains, additional loads from passengers and cargo. Ball bearings, due to their small friction coefficient and high load-bearing capacity, can operate stably under high load conditions, ensuring smooth train operation.

2. Smooth operation and low noise
Ball bearings can effectively reduce friction, decrease frictional heat and noise between moving parts, and are particularly suitable for subway systems. They can provide a smooth operating experience and reduce noise pollution to the surrounding environment.

3. Adapt to high-speed movement
Subway trains run at a fast speed, and ball bearings, due to their excellent rolling friction characteristics, can maintain stability during high-speed motion, reduce unnecessary vibrations, and improve the stability and safety of travel.

4. Corrosion resistance performance
The subway system is often exposed to humid or dusty environments. Ball bearings are made of stainless steel or other corrosion-resistant materials, which can resist corrosion and oxidation, ensuring that they are not affected by the environment during long-term operation.

5. Low maintenance and long lifespan
Compared to other types of bearings such as sliding bearings, ball bearings require less maintenance and have a longer service life, reducing the maintenance frequency and related costs of subway bearing systems, thereby improving the economy and reliability of subway operations.

6. High space utilization efficiency
The compact structure of ball bearings is suitable for small spaces in large equipment such as subways. Its efficient motion characteristics make the design of subway systems more compact and lightweight, while also being able to withstand large loads in limited spaces.

7. Thermal stability and vibration resistance
The subway system generates a certain amount of heat during long-term operation, and the design of ball bearings can meet this challenge, ensuring stable operation at higher temperatures. At the same time, their lower frictional heat accumulation ability helps maintain thermal stability and reduce the risk of overheating.