First, learn about the operating conditions of the aircraft engine:
1. High speed, the speed of the general aircraft engine is more than 18,000 rpm/minutes. Such a high speed requires the material.
2. High temperature, the engine operating temperature is very high, the operating temperature of the bearings may also reach 300 ° C, and the bearing material needs to tolerate high temperature.
3. High reliability, whether it is a civil aircraft or a fighter, the requirements for reliability are very high, and the slight difference is that it is life.
Knowing the operating conditions of the bearing, you can choose the bearing that adapt to the condition. Due to the high temperature of the bearing, the AISIM50 material with high temperature resistance and high temperature stability is used. Can reach 58HRC.
When running at a high speed, because the inner ring of the bearing is rotated and the centrifugal force is very large, and the inner ring section of the bearing inner ring bears the ring tensile stress, there must be no micro -cracks on the surface of the inner ring to avoid the expansion of cracks under tensile stress. Therefore, it is often used. Therefore, it is often used. AISIM50nil material is made of inner ring.
Due to the high speed, in order to reduce the extra load caused by the centrifugal force, the ceramic materials with relatively light quality and high hardness, such as silicon nitride (SI3N4) or carbonized titanium (TIC) are used as steel ball materials Sometimes in order to increase the abrasion resistance of the inner and outer ring of the bearing and reduce friction, the inner-outer ring roller is also sprayed with ceramics.
This is not over yet. The engine temperature can be more than 300 ° C. The maximum of 1500 ° C is above 1500 ° C. How can the bearing temperature be 300 ° C. This is the credit of the lubrication system. In fact, the main function of the bearing lubrication system is the cooling effect. Then, then, then
First, learn about the operating conditions of the aircraft engine:
1. High speed, the speed of the general aircraft engine is more than 18,000 rpm/minutes. Such a high speed requires the material.
2. High temperature, the engine operating temperature is very high, the operating temperature of the bearings may also reach 300 ° C, and the bearing material needs to tolerate high temperature.
3. High reliability, whether it is a civil aircraft or a fighter, the requirements for reliability are very high, and the slight difference is that it is life.
Knowing the operating conditions of the bearing, you can choose the bearing that adapt to the condition. Due to the high temperature of the bearing, the AISIM50 material with high temperature resistance and high temperature stability is used. Can reach 58HRC.
When running at a high speed, because the inner ring of the bearing is rotated and the centrifugal force is very large, and the inner ring section of the bearing inner ring bears the ring tensile stress, there must be no micro -cracks on the surface of the inner ring to avoid the expansion of cracks under tensile stress. Therefore, it is often used. Therefore, it is often used. AISIM50nil material is made of inner ring.
Due to the high speed, in order to reduce the extra load caused by the centrifugal force, the ceramic materials with relatively light quality and high hardness, such as silicon nitride (SI3N4) or carbonized titanium (TIC) are used as steel ball materials Sometimes in order to increase the abrasion resistance of the inner and outer ring of the bearing and reduce friction, the inner-outer ring roller is also sprayed with ceramics.
This is not over yet. The engine temperature can be more than 300 ° C. The maximum of 1500 ° C is above 1500 ° C. How can the bearing temperature be 300 ° C. This is the credit of the lubrication system. In fact, the main function of the bearing lubrication system is the cooling effect.