Jixie chuandong (Jan 2024)
Time-varying Reliability Analysis of Planetary Gear Reducers Based on Fatigue Failure
Abstract
With technological innovation and social development, the reliability of planetary gear reducers is required to be higher and higher. However, the reliability of planetary gear reducers changes due to fatigue factors in its operation. To solve this problem, firstly, according to the stress-strength interference theory, the time-varying reliability model of planetary gear reducers under fatigue failure (mainly tooth surface contact fatigue failure and tooth root bending fatigue failure) is constructed. Secondly, combined with the monotone theorem, the time-varying reliability model is simplified, and the reliability of planetary gear reducers is solved by Matlab programming. The sensitivity of each variable of the time-varying reliability model is analyzed. Finally, taking PM90 precision planetary gear reducer as an example, the reliability and sensitivity of each variable based on fatigue failure are obtained respectively, and the time-varying law of reliability under contact fatigue failure and bending fatigue failure is expounded, which lays the foundation for the time-varying reliability analysis of planetary gear reducers.
