Dynamic simulation and load sharing performance analysis of double-ring herringbone planetary gear train with crack faults

Ren Fei; Zang Xu; Wang Caidong; Zhang Dehai; Cui Guangzhen; Wang Liangwen; Gong Xiaoyun; Li Liwei; Yang He; Du Yanlai

doi:10.16186/j.cnki.1673-9787.2025010031

Abstract：Objectives In order to investigate the influence of different types of crack failures on the contact force characteristics and load sharing performance of the double-ring herringbone planetary gear train,Methods based on SolidWorks and ADAMS,a joint simulation study of faults was conducted.Precise vir-tual prototype models were respectively established for the healthy state and the double-ring herringbone planetary gear train with three different crack faults of penetrating,non-penetrating,and end-face penetrat-ing on the planet gear.The GSTIFF integration method was adopted to solve the tooth contact forces under healthy and different typical crack fault conditions,the load sharing coefficient of the system was calcu-lated,and the contact force characteristics of the internal and external meshing pairs in the time-frequency domain and the variation law of the load sharing performance of system were analyzed.Results The results indicated that in the healthy state,the contact forces of each gear pair exhibited stable cyclic variations.The simulated fundamental frequency differed from the meshing frequency by only 1%.The load sharing co-efficient of the internal and external meshing pairs were 1.006 and 1.007,demonstrating good load sharing performance of the system.In the presence of crack failures,when the depth of penetrating cracks extended to 30 mm,the load sharing coefficient of the internal and external meshing pairs increased by 6.2%and 9.2%respectively;when the angle of penetrating cracks extended to 60°,the load sharing coefficient of the internal and external meshing pairs increased by 6.6%and 7.8%respectively;when the effective length of non-penetrating cracks extended to 120 mm,the load sharing coefficient of the internal and external mesh-ing pairs increased by 4.3%and 4.1%respectively;and when the effective width of end-face penetrating cracks extended to 150 mm,the load sharing coefficient of the internal and external meshing pairs in-creased by 10.8%and 11.4%respectively.Conclusions As the degree of crack faults increased,the load sharing coefficient exhibited a gradual rise,indicating a gradual deterioration in load sharing performance.The external meshing load sharing performance of the system was more significantly impacted than the that of the internal meshing,and the presence of end-face penetrating cracks on the planet gear had a notably greater impact on the load sharing performance of system compared to penetrating and non-penetrating cracks.