Abstract
In order to clarify the fatigue characteristics of the rigid rocker arm of the aero-engine and meet the requirements of the rigid rocker arm during actual operation, a rigid rocker fatigue test bench of the VSV mechanism was designed based on a certain aero-engine. In order to simulate the actual working conditions, the equivalent aerodynamic load was applied to the equivalent blade by the loading device. The stroke of the actuator was controlled by PID and operated according to the preset stroke-time curve. The rigid rocker arm was subjected to 1 000 fatigue cycles under the working condition, and the changes of blade angle and mechanism hysteresis force during the fatigue process were analyzed. The test results showed that the hysteresis force of the left piston rod was greater than that of the right one. The hysteresis force of the first stage connecting rod was much smaller than that of the other stages, and the blade rotation angle had higher accuracy after 1 000 fatigue cycles.
| Translated title of the contribution | Design of rigid rocker arm fatigue test bench for aero engines and fatigue characteristics test |
|---|---|
| Original language | Chinese (Traditional) |
| Article number | 20230197 |
| Journal | Hangkong Dongli Xuebao/Journal of Aerospace Power |
| Volume | 40 |
| Issue number | 1 |
| DOIs | |
| State | Published - Jan 2025 |
| Externally published | Yes |
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