Compared to conventional bearings, the quality inspection methods for aviation bearings are more stringent, mainly reflected in the following aspects:

Material selection and inspection:

Material requirements: The materials used in aviation bearings must have high strength, hardness, wear resistance, fatigue resistance, and other characteristics to withstand extreme working environments and conditions. These requirements mean that strict chemical composition analysis and micro-structure analysis must be conducted when selecting materials.

Surface treatment: The surface treatment of aviation bearings usually includes chemical plating, carburization, nitriding, chrome plating, and other processes, which not only improve the surface hardness of the material but also enhance its corrosion resistance. Therefore, strict control and inspection of these processing technologies are also extremely important.

Dimensional accuracy and geometric tolerance:

Dimensional accuracy: The dimensional accuracy requirements for aviation bearings are extremely high to ensure stable operation under high load and high-speed conditions. This requires precise measurement equipment and strict measurement standards to be implemented.

Geometric tolerance: The geometric tolerance requirements for aviation bearings are also very strict to ensure stability during assembly and use. For example, the tolerance requirements for the roundness and coaxiality of the bearing are much higher than those of ordinary bearings.

Fatigue life and durability:

Fatigue life testing: When designing aviation bearings, consideration must be given to their fatigue life under long-term operation, which is usually achieved through fatigue tests under simulated actual working conditions to evaluate their durability under extreme conditions.

Durability testing: In addition to fatigue life testing, aviation bearings also need to undergo various durability tests to verify their performance under various extreme conditions, such as high temperature, low temperature, humidity, vibration, and other conditions.

Micro-structure and micro-defects:

Micro-structure analysis: The micro-structure of aviation bearings requires high standards, and detailed analysis of the internal micro-structure of the bearing is usually required through equipment such as microscopes and scanning electron microscopes to ensure the uniformity and integrity of the internal structure.

Micro-defect detection: Strict detection is conducted on the internal micro-defects of the bearing, such as cracks and inclusions, through means such as microscopes and ultrasonic testing to ensure its safety.

Environmental adaptability:

Temperature resistance: Aviation bearings need to operate under extreme temperature conditions, so performance testing under high and low temperature environments is essential.

Corrosion resistance: Aviation bearings usually operate in complex and variable environments, so the testing and verification of their corrosion resistance performance are particularly important.

In summary, the quality inspection methods for aviation bearings are more stringent because they are directly related to the safety and reliability of the aircraft. Therefore, strict control is required in terms of material selection, manufacturing processes, and inspection methods to ensure that they can withstand extreme working environments and conditions.