A phenomenological model for investigating unequal planet load sharing in epicyclic gearboxes

Liu, Zongyao; Lei, Yaguo; Liu, Huan; Yang, Xiao; Song, Wenlei

doi:10.1016/j.ymssp.2019.106414

Cited by 31 publications

(4 citation statements)

References 28 publications

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“…That is because curved tooth coupling has a larger angular displacement, and can compensate for radial displacement, axial displacement, and To achieve an even load sharing and ensure the reliability of the system, as well as to extend the system's service life, we need to take measures in the process of the structure design and try to improve the accuracy in the process of the machining and installation of each component, so as to improve the load-sharing performance of the entire planetary gear train system. Generally, measures to improve this load-sharing performance include tolerance control, precise manufacture and installation, floating the load-sharing mechanisms of core components, and an elastic deformation load-sharing technique [33,34]. With regard to the planet gear train model in this paper, we use curved tooth coupling instead of straight tooth coupling.…”

Section: Meshing Force Analysis Of Planetary Gear Trainmentioning

confidence: 99%

The Non-Linear Excitation Load-Sharing Method of a High-Powered Nuclear Planetary Gear Train

Wei,

Dong,

Wang

et al. 2023

Processes

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The paper primarily employs the 3D calculation method of the helical gear-meshing line and meshing position, in addition to the traditional method of the gear-meshing stiffness calculation. This analysis and correction of load-sharing are beneficial for improving the assembly process of high-powered critical equipment. The dynamic models of rigid–flexible coupling, velocity–torque, and the meshing force of planetary gear trains in nuclear power plants are established based on the principles of gear dynamic characteristics. Based on an analysis of the vibration characteristics of a planetary gear train, a load-sharing method for the planetary gear train is proposed. This uniform load-sharing method is explored under different modification values to provide a reference for load-sharing research on high-powered key equipment. In this paper, a dynamic simulation analysis of the gearbox system is conducted, using virtual prototype software to study the load-sharing performance of the planetary gear system. Furthermore, via a vibration frequency analysis of the gear mesh force, the causes of planetary gear train vibration are discussed, particularly their impact on planetary load. This provides a basis for the assembly process of a nuclear power circulation pump gearbox, ensuring that the gearbox for the circulation pump has a longer life that meets the 40-year service life requirement, and provides a foundation for the study of planetary load characteristics.

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Section: Meshing Force Analysis Of Planetary Gear Trainmentioning

confidence: 99%

The Non-Linear Excitation Load-Sharing Method of a High-Powered Nuclear Planetary Gear Train

Wei,

Dong,

Wang

et al. 2023

Processes

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“…The paper of Z. Liu and others proposes a phenomenological model of vibration signal of epicyclic gear train which considers uneven distribution of load among planetary gears [31]. This model assumes that angular motion of a planetary gear simulates manufacturing or assembly errors in transmissions and computes various ratios of load distribution among planetary gears.…”

Section: Effect Of Vibration To Planetary Gear Trainsmentioning

confidence: 99%

Critical Analysis of Design of Ravigneaux Planetary Gear Trains

Stanojević¹,

Tomović²,

Ivanović³

et al. 2022

Applied Engineering Letters

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Planetary gear trains have been applied for a long time in the automotive industry as an irreplaceable part of automatic gearboxes. This paper presents, based on existing research, the kinematic analysis and evaluation of Ravigneaux gear trains, effects of power flow analysis and power loss, evaluation of utility effects of energy utilization through analysis of efficiency. It also illustrates research topics that analyse technical challenges of understanding and predicting dynamics and vibrations of planetary gear trains in the process of design of their configuration, optimization of given gear trains in reference to set criteria and affirmation of validity of their constructions by prototyping and prototype testing on the test stand.

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“…Yu et al [10] established a phenomenological model considering the time-varying speed conditions of the planetary gearbox, which effectively explained the sideband symmetry near the resonance frequency. Liu et al [11] established a phenomenological model of the planetary gearbox considering uneven load distribution among planetary gears and revealed the mechanism of additional sidebands under nonuniform load distribution conditions. Parra et al [12] found the phenomenological model and the centralized parameter model for PGs without and with faults, respectively, and compared the results of these two models to confirm that the phenomenological model is the most efficient in generating gearbox vibration signals.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Vibration Characteristics of Planetary Gearbox with Broken Sun Gear Based on Phenomenological Model

Zou,

Ma,

Xiong

et al. 2023

Applied Sciences

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To investigate the vibration properties in healthy and fault conditions of planetary gearboxes, a phenomenological model is constructed to present the vibration spectrum structure. First, the effects of the base deflection of the gear fillet and the flexibility between the root circle and the base circle on the time-varying meshing stiffness are considered in order to construct an equivalent model of time-varying mesh stiffness and broken tooth faults, exploring the law of variation for meshing stiffness when differently sized faults occur on the sun gear. Then, considering both the effect of the vibration transfer path and the meshing impacts, we establish phenomenological models of planetary gears under healthy and fault conditions. By comparing and analyzing the phenomenological model based on the cosine function to verify the effectiveness of the proposed model. The experimental results show that the error of the proposed model is 1.38% lower than that of the traditional phenomenological model, and the proposed model can accurately analyze the frequency, amplitude, and sideband characteristics of the vibration signals of sun gear with different degrees of broken tooth, which can be used for the local fault diagnosis of planetary gearboxes.

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A phenomenological model for investigating unequal planet load sharing in epicyclic gearboxes

Cited by 31 publications

References 28 publications

The Non-Linear Excitation Load-Sharing Method of a High-Powered Nuclear Planetary Gear Train

The Non-Linear Excitation Load-Sharing Method of a High-Powered Nuclear Planetary Gear Train

Critical Analysis of Design of Ravigneaux Planetary Gear Trains

Analysis of Vibration Characteristics of Planetary Gearbox with Broken Sun Gear Based on Phenomenological Model

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