Dynamic characteristics of the herringbone planetary gear set during the variable speed process

Liu, Changzhao; Qin, Datong; Lim, Teik C.; Liao, Y. Gene

doi:10.1016/j.jsv.2014.07.024

Cited by 62 publications

(41 citation statements)

References 24 publications

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“…As shown in Fig. 8, three types of coordinate systems are included in the generalized coordinate system: (1) the static coordinate system , (2) the moving coordinate system rotating with the carrier, and (3) the moving coordinate system rotating with the carrier, where is in the radial direction and is in the tangential direction [21].…”

Section: Overall System Modelmentioning

confidence: 99%

Analytical coupling characterization of multi-stage planetary gear free vibration considering flexible structure

Zhang¹,

Wei²,

Qin³

et al. 2017

J. vibroeng.

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The mode characteristics and the parameter sensitivity for a two-stage NGW spur planetary gear system are studied based on the principles of structure natural dynamical characteristics. Considering the influence of flexible structure including shaft, the planet carrier, and the ring-gear, the coupled lateral-torsional-axial vibration dynamical model of the planetary gear system is established under the generalized coordinate system using the shafting element method. With the model, the natural frequency and vibration mode are solved, and the results indicate that the flexibility of ring-gear has a greater effect on natural frequency. Several distinct types of vibration mode are summarized, such as planet torsional mode, sun-gear shaft axial mode, ring-gear axial mode and so on. However, the translational mode which is one of the modes in the coupled lateral-torsional lumped mass model is not found in this study. Within the scope of the time-varying, mesh stiffness mainly affects the planet torsional mode of corresponding stage. Furthermore, the variation of radial bearing stiffness will also do effect on axial vibration mode, and the variation of bearing stiffness not only affects the vibration modes of adjacent stage of planetary gear train, but also affects the nonadjacent stage. The results demonstrate the coupling characteristics of the system under the free vibration condition.

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Section: Overall System Modelmentioning

confidence: 99%

Analytical coupling characterization of multi-stage planetary gear free vibration considering flexible structure

Zhang¹,

Wei²,

Qin³

et al. 2017

J. vibroeng.

Self Cite

View full text Add to dashboard Cite

show abstract

“…The prediction method of wedge was developed and validated based on geometric interaction. Liu et al (2014Liu et al ( , 2017 proposed a analytical approach for dynamic behavior of the planetary system in a variable speed process and high speed process with the centrifugal force taken into account. The influence of tooth profile error excitation on vibration and the dynamic meshing force was studied before and after gear separation, and corresponding suggestions were put forward in terms of restraining system vibration and reducing the dynamic meshing force.…”

Section: Introductionmentioning

confidence: 99%

Dynamical modeling and coupling characteristic analysis of the multistage gears system in a continuous miner

Lu¹,

Zhang²,

Cheng³

et al. 2020

Journal of Theoretical and Applied Mechanics

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The lumped parameter method is adopted to establish a dynamic model of two stage planets and multistage fixed-shaft gears in which the effect of coupling shaft section radius on the system in a continuous miner is considered. The acceleration test of the system proves the accuracy of the proposed model. With the increase of cross section size of the coupled shaft, the influence of the first stage meshing frequency on the second stage planetary system is enhanced. The acceleration decreases gradually with the increase of the size of coupled carrier. It is shown that the modeling by considering the coupled size contributes to reduction of the vibration level.

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“…Therefore, these models [2][3][4][5] just can be used in vibration analysis of transmission systems at a stable mean angular velocity with small fluctuation, not for variable speed processes. A translational-torsional dynamic model of variable speed process was proposed for the herringbone planetary gear set in the reference [6]. In this dynamic model, the translational and angular displacements are chosen as the generalized coordinates, moreover, the meshing stiffness and profile error excitation are variable with the angular displacements of the herringbone planetary gear set.…”

Section: Introductionmentioning

confidence: 99%

“…In this dynamic model, the translational and angular displacements are chosen as the generalized coordinates, moreover, the meshing stiffness and profile error excitation are variable with the angular displacements of the herringbone planetary gear set. In this study, a torsional dynamic model of variable speed process for the spur planetary gear set [7] is utilized that is simplified from the model in [6]. In the dynamic model of the planetary gear set [7], the angular displacements chosen as the generalized coordinates, so it is convenient to be connected to the electric motor model to construct the electromechanical dynamic model.…”

Section: Introductionmentioning

confidence: 99%

Electromechanical dynamic analysis for the cutting transmission system of the unmanned long-wall shearer under variable speed process

Liu¹,

Qin²,

Liao³

2017

J. vibroeng.

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The drum shearer is one of the main equipments of the long-wall mining system. A typical condition to adjust the hauling and drum speeds is when the drum load exceeds the allowable value due to the hardness increase of the coal seam. Two schemes are utilized in this condition herein: (1) increasing the drum speed directly and maintaining the hauling speed; (2) decreasing the hauling speed firstly, then increasing the drum speed, finally increasing the hauling speed to the original value. The electromechanical dynamic model is firstly constructed for the Cutting Transmission System, and then the electromechanical dynamic analysis is conducted with both schemes, discovering that: the first scheme is quicker but may bring instability; the second is stable but slower; the resonance in frequencies obtained in different meshing conditions can be excited at the same time. At last, some advices are given for the development of the speed control strategies and mechanical design of the unmanned long-wall shearer.

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Dynamic characteristics of the herringbone planetary gear set during the variable speed process

Cited by 62 publications

References 24 publications

Analytical coupling characterization of multi-stage planetary gear free vibration considering flexible structure

Analytical coupling characterization of multi-stage planetary gear free vibration considering flexible structure

Dynamical modeling and coupling characteristic analysis of the multistage gears system in a continuous miner

Electromechanical dynamic analysis for the cutting transmission system of the unmanned long-wall shearer under variable speed process

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