Meshing Stiffness Parametric Vibration of Coaxial Contrarotating Encased Differential Gear Train

Zhang, Donglin; Zhu, Rupeng; Li, Miaomiao; Tan, Wuzhong; Li, Pingjun

doi:10.1155/2021/8950945

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…The encased differential planetary gear train consists of an encased stage star gear train and a differential stage planetary gear train, and the diagram is shown in Fig. 1 23 . The encased star gear train is composed of sun gear s 1 , star gear a i , b i ( i = 1, 2, …, M ) and inner ring gear r 1 , and the differential stage planetary gear train is composed of sun gear s 2 , planetary gear p j ( j = 1, 2,…, N ) and inner ring gear r 2 .…”

Section: The Dynamic Load-sharing Model Of Encased Differential Plane...mentioning

confidence: 99%

The effect of floating spline parameter on the dynamic characteristic of encased differential planetary gear train

Che,

Yu,

Zhang

et al. 2024

Sci Rep

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The load sharing performance of encased differential planetary system has a great impact on the operating performance and service life of the transmission system of the coaxial high speed helicopter. In order to improve the load-sharing performance of the gear pair, the influence of different floating spline structural parameters on the load sharing characteristics of the system was studied. Considering the manufacturing error, installation error, time varying meshing stiffness and other factors, the Lagrange equation is used to construct the dynamic model of encased differential planetary gear train with floating spline structure. The effects of input torque, spline clearance, spline shaft stiffness and spline friction coefficient on the load sharing performance of gear pairs were analyzed. The results show that the differential stage system has a better load sharing performance than the encased stage system. The increase of input torque helps to improve the load sharing performance of the system, and the improvement of the encased stage system is more obvious. The floating spline of sun gear of the encased stage has a greater impact on the load sharing performance of the system. Furthermore, increasing the floating spline clearance, reducing spline shaft stiffness or increasing the friction coefficient of the spline can improve the load sharing performance of the system overall.

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Section: The Dynamic Load-sharing Model Of Encased Differential Plane...mentioning

confidence: 99%

The effect of floating spline parameter on the dynamic characteristic of encased differential planetary gear train

Che,

Yu,

Zhang

et al. 2024

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Zhu et al [3][4][5] analyzed the dynamic floating displacement of center gear and meshing stiffness variation instabilities in an encased differential planetary gear train and studied the nonlinear dynamic behavior. Zhang et al [6][7][8] studied the dynamic characteristic of a coaxial contrarotating encased differential gear train. Yang et al [9] investigated the dynamic characteristic of an encased differential gear train with journal bearing.…”

Section: Introductionmentioning

confidence: 99%

Effect of Floating Support Parameters on the Load-Sharing Performance of EDPGS Based on Mathematical Statistical Methods

Che,

Zhu

2024

Machines

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The encased differential planetary gear system (EDPGS) allows power to be distributed among multiple output paths, enhancing efficiency and reducing weight. Uniform load distribution ensures stable system operation and prolongs service life. However, stochastic manufacturing errors leading to uneven load distribution pose challenges in engineering practice. To investigate the impact of floating support parameters on the load-sharing performance within an acceptable tolerance band, a dynamic model of the EDPGS considering time-varying meshing stiffness and random errors is established using the Monte Carlo method. This study employs the orthogonal experimental design method to analyze the effects of floating support stiffness and clearance on the load-sharing characteristics. The findings indicate that a larger sample size leads to a probability distribution of load-sharing coefficients closer to the Gaussian distribution, with minimal influence on the expectation and variance. Furthermore, this study highlights the significant influence of floating structure parameters on load-sharing characteristics in the encased stage systems compared to the differential stage. Decreasing floating support stiffness or increasing floating clearance proves beneficial in enhancing the load-sharing performance of the system.

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“…The inner and outer output shafts support each other through intermediate bearings. These factors make the vibration of the gearbox caused by the dynamic meshing force and supporting force very prominent, so it is necessary to study its dynamic characteristics 3 .…”

Section: Introductionmentioning

confidence: 99%

Dynamic modeling and analysis of the rotor–stator coupling system of a coaxial contra-rotating gearbox

Zhang,

Cui,

Zhu

et al. 2023

Sci Rep

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In this paper, a main gearbox using an encased differential gear train to achieve coaxial contra-rotating is considered, and a dynamic modeling method of the rotor–stator coupling system of the gearbox based on box model updating is introduced. The transverse torsional dynamic model of the gear transmission subsystem is established based on the lumped parameter method. The finite element model of the box is updated according to the modal test data, and the reduced dynamic parameters of the box are obtained. According to the displacement coordination condition, the dynamic model of the rotor–stator system of the gearbox is established. The vibration response of the transmission components with or without the coupling box is calculated by numerical integration, and the response of the box caused by the dynamic support reaction force is analyzed by the finite element method. The results show that the vibration peak and fluctuation range of the transmission parts with coupling box are smaller than those without coupling box. The box response at the support of the input bevel gear pair is large, while that at the support of the output shaft is small.

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Meshing Stiffness Parametric Vibration of Coaxial Contrarotating Encased Differential Gear Train

Cited by 4 publications

References 17 publications

The effect of floating spline parameter on the dynamic characteristic of encased differential planetary gear train

The effect of floating spline parameter on the dynamic characteristic of encased differential planetary gear train

Effect of Floating Support Parameters on the Load-Sharing Performance of EDPGS Based on Mathematical Statistical Methods

Dynamic modeling and analysis of the rotor–stator coupling system of a coaxial contra-rotating gearbox

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