Influences of carrier assembly errors on the dynamic characteristics for wind turbine gearbox

Zhai, Hongfei; Zhu, Caichao; Song, Chaosheng; Liu, Huaiju; Bai, Huiyu

doi:10.1016/j.mechmachtheory.2016.04.015

Cited by 34 publications

(11 citation statements)

References 12 publications

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“…To study the dynamics of the planet, the equivalent meshing backlash caused by the manufacturing errors [25], the assembly errors [26], and the floating component errors [13] needs to be considered. Therefore, several parts have been taken into account in the cumulative meshing error calculation, as shown in Figure 4.…”

Section: Planetary Gear Set Errorsmentioning

confidence: 99%

Quasi-Static Load Sharing Characteristics of a Planetary Gear Set with Planet Journal Bearings

Zhi-qiang

Li²,

et al. 2020

Applied Sciences

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The quasi-static load sharing characteristics of a planetary gear set with planet journal bearings are numerically investigated. The application of journal bearings instead of rolling bearings in planetary gear sets is an alternative to increase the rotation speed. Therefore, an effective analysis method is needed to estimate the dynamic performance of a planetary gear set with planet journal bearings. Here, an available load sharing factor computation method is developed considering the effect of the variable journal bearing stiffness. Results of an experiment are used to validate the effectiveness of the computation method. Furthermore, the load sharing characteristics of a planetary gear set with planet journal bearings are influenced by bearing parameters and operating conditions significantly due to the changing bearing stiffness of journal bearings. The effects on the load sharing factor and the bearing stiffness are studied in detail simultaneously based on the proposed analysis method. The load sharing factor of a planetary gear set with planet journal bearings has a similar variation with the bearing support stiffness under the same load. These researches provide a theoretical basis for the application of journal bearings in planetary gear sets.

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Section: Planetary Gear Set Errorsmentioning

confidence: 99%

Quasi-Static Load Sharing Characteristics of a Planetary Gear Set with Planet Journal Bearings

Zhi-qiang

Li²,

et al. 2020

Applied Sciences

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“…The dynamic model of the planetary and parallel stage is shown in the left picture and the right picture, respectively. Zhai et al derived and analyzed dynamic equations of the speed‐implement transmission system. Dynamic equations of the wheel and pinion gears of the speed‐implement transmission system are expressed in Equations () and (), respectively.

({, \begin{matrix} m_{w} {\ddot{x}}_{w} + K_{wx} x_{w} + K_{wpp} cos (φ_{pp} - \frac{π}{2} - α_{wt}) cos β_{w} δ_{wpp} + K_{wppT} cos (φ_{ppT} - α_{wt}) cos β_{w} δ_{wppT} = 0 \\ m_{w} {\ddot{y}}_{w} + K_{wy} y_{w} + K_{wpp} sin (φ_{pp} - \frac{π}{2} - α_{wt}) cos β_{w} δ_{wpp} + K_{wppT} cos (φ_{ppT} - α_{wt}) cos β_{w} δ_{wppT} = 0 \\ m_{w} {\ddot{z}}_{w} + K_{wz} z_{w} - K_{wpp} sin β_{w} δ_{wpp} - K_{wppT} cos β_{w} δ_{wppT} = 0 \\ I_{w}^{x} {\ddot{θ}}_{w}^{x} + K_{θ x}^{w} θ_{w}^{x} = 0 \\ I_{w}^{y} {\ddot{θ}}_{w}^{y} + K_{θ y}^{w} θ_{w}^{y} - K_{wpp} sin β_{w} r_{wje} δ_{wpp} + K_{wppT} sin β_{w} r_{ppTje} \end{matrix})

…”

Section: Dynamics Model and Parameters Of The Transmission Systemmentioning

confidence: 99%

“…The dynamic model of the planetary and parallel stage is shown in the left picture and the right picture, respectively. Zhai et al 8 derived and analyzed dynamic equations of the speed-implement transmission system. Dynamic equations of the wheel and pinion gears of the speed-implement transmission system are expressed in Equations (1) and (2), respectively.…”

Section: Dynamic Model Of the Speedimplement Transmission Systemmentioning

confidence: 99%

“…5 Generally, the flexible-pins type transmission structure provides the best load-sharing performance. In order to investigate the transmission characteristics of the conventional wind turbine gearbox, many factors, such as uncertainties, 6 the flexibility of the internal ring gear, 7 and assemble errors of the pin shafts 8 investigated the effect of variable input loads 9 and the gravity 10 on the wind turbine gearbox. A huge wave was existed in the dynamic load-sharing coefficient curve because of the gravity of the parts.…”

Section: Introductionmentioning

confidence: 99%

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The transmission characteristic for the improved wind turbine gearbox

Fan

Zhu

et al. 2019

Energy Science & Engineering

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The structure of an improved wind turbine gearbox is presented for meeting the operation of the optimized wind turbine power‐wind speed curve (P‐v curve). When the wind speed is lower than the cut‐in wind speed, the operation mode of the wind turbine is changed by the extra power, which is supplied by the motor excited source to keep the wind turbine running. Moreover, the transmission principle of the improved wind turbine gearbox is discussed. Various motor power impacts on the transmission characteristic for the improved transmission structure are investigated and results are compared with the professional software. Results indicate that as the motor power increases, the transverse vibration of sun gears and meshing forces of the low‐speed and medium‐speed planetary stages decreases. The transverse vibration for the pinion gear of the high‐speed stage enhances with the increase of the motor power. Load‐sharing coefficients of the planetary gear stages are augmented with the enlargement of the motor power. It is found that meshing forces of the torque‐implement parallel stage are increased with augmentation of the motor power.

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“…In terms of multiple errors (e.g., eccentricity error, base pitch error, and assembly error), Mo et al [14] proposed an improved mathematical model of the loading sharing coefficient for compound planetary gear train, which was verified by experiments. Using a lumped parameter method, Zhai et al [15] developed the bending-torsional-pendular coupled vibration model of the wind turbine gearbox transmission system and studied the frequency response of carrier assembly errors (e.g., carrier horizontal assembly error, carrier axis assembly error, and carrier spatial assembly error) to the dynamic meshing force and dynamic transmission error.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Characteristics of Encased Differential Gear Train with Journal Bearing

Yang

Yue²,

Zhu

et al. 2020

Mathematical Problems in Engineering

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Taking the marine encased differential gear train as an example, the relationship between the journal bearing parameters and the meshing force of the transmission system is analyzed. In this paper, the dynamic model of the encased differential gear train with journal bearing is established considering the factors of time-varying meshing stiffness and comprehensive transmission error. In this dynamic model, four stiffnesses and four damping coefficients are applied to characterize the asymmetry and interaction of the oil film stiffness and damping of planet bearing. The system responses are calculated by the Fourier series numerical algorithm. The results show that the introduction of journal bearing in encased differential gear train can contribute to gearbox vibration reduction. Moreover, the planet bearing parameters (e.g., clearance-to-radius ratio and eccentricity ratio) of the differential stage affect the meshing forces of both the differential and encased stages. In addition, the influence of the planet bearing parameters of the encased stage on the meshing force of the encased stage is more obvious than that of the differential stage. This work may develop a theoretical analysis framework for the design and manufacture of marine transmission systems in the future.

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Influences of carrier assembly errors on the dynamic characteristics for wind turbine gearbox

Cited by 34 publications

References 12 publications

Quasi-Static Load Sharing Characteristics of a Planetary Gear Set with Planet Journal Bearings

Quasi-Static Load Sharing Characteristics of a Planetary Gear Set with Planet Journal Bearings

The transmission characteristic for the improved wind turbine gearbox

Dynamic Characteristics of Encased Differential Gear Train with Journal Bearing

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