Reliability analysis of key components of adjustment mechanism of umbrella wind turbine

For the new umbrella wind turbine, the influence of the shrinkage angle on the stress of key components of the adjusting mechanism is studied using the wethod of combining numerical simulation and experimental research. The results show that: in the shrinking process of the umbrella wind wheel, the root stress is mainly generated by the bending moment of the blade centrifugal force, and the blade root stress reaches the maximum value at a shrinkage angle of 45°. As the shrinkage angle increases, there is migration in the blade support stress concentration area. The maximum stress value is mainly generated by the bending moment acting on the blade support arm, while the link is mainly subjected to the normal stress generated by the alternating load, both of which reach the maxinum value at 45° of shrinkage angle; When the shrinkage angle increases to 60°, due to the decrease of the centrifugal force of the blade, the stresses of the blade root, blade support arm and link arm all appear to decrease. Based on the above results, the intensity check and load test of the adjusting mechanism components are carried out. The comparative analysis of simulation and experiment verifies the rationality of the design of the umbrella wind turbine adjusting mechanism and the reliability of operation. © 2021, Solar Energy Periodical Office Co., Ltd. All right reserved.