The applicability and key role of high-temperature bearings in the hot-end components of aero-engines are an extremely important topic, as they directly relate to the performance, reliability, and service life of aero-engines. The hot-end components of aero-engines mainly include combustion chambers, turbines, and compressors, which are subjected to extreme temperatures, pressures, and chemical corrosion during operation, posing high requirements on materials and components.

The applicability of high-temperature bearings

High-temperature bearings generally refer to bearings that can operate normally at higher temperatures. Their design and material selection mainly take into account the performance requirements under high-temperature environments. In the hot-end components of aero-engines, the application of high-temperature bearings is mainly concentrated on components such as turbine disks, guide vanes, and stator vanes. These components are subjected to direct impact from high-temperature combustion gases during engine operation, and therefore, there are strict requirements for the high-temperature stability, creep resistance, corrosion resistance, and thermal fatigue life of the bearing materials.

The key role of high-temperature bearings

Supporting and transmitting power: High-temperature bearings, as an important part of the hot-end components, are responsible for transmitting the power generated by the engine while supporting the weight and inertial force of these components, ensuring that the engine can efficiently convert the chemical energy of fuel into kinetic energy.

Extending component life: By using high-temperature bearings, it can effectively reduce material fatigue and wear caused by temperature fluctuations and thermal stress, thereby extending the service life of engine components and reducing maintenance costs.

Improving engine performance: In high-temperature environments, the use of appropriate bearings can ensure the stable operation of the engine at high speeds and loads, thereby improving the overall performance and efficiency of the engine.

Ensuring flight safety: High-performance high-temperature bearings are the key to ensuring the normal operation of aero-engines and are crucial for flight safety. Any failure of a component may lead to serious consequences, therefore, the reliability and durability of high-temperature bearings are a core consideration in the design of aero-engines.

　　In summary, the application of high-temperature bearings in the hot-end components of aero-engines not only enhances the overall performance of the engine but also strengthens its reliability and durability under extreme conditions. With the development of aeronautical technology, the requirements for high-temperature bearing materials and design are also constantly improving, and the future research direction will focus more on material innovation, performance optimization, and reliability enhancement.