Failure analysis on abnormal wear of roller bearings in gearbox for wind turbine

Gong, Yi; Fei, Jing-Lu; Tang, Jie; Yang, Zhen‐Guo; Han, Yongming; Li, Xiang

doi:10.1016/j.engfailanal.2017.08.015

Cited by 39 publications

(10 citation statements)

References 52 publications

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“…Under the continuous action, the furrows gradually grow wider and deeper along with the removal of the base materials. The residual stresses reduce the fatigue performance of steel components during dynamic loading [17][18] . The extrusion and sliding of feed powder results in the accumulation of cyclic plastic deformation and the appearance of fatigue flaking [Fig.…”

Section: Discussionmentioning

confidence: 99%

Failure analysis of ring die of a feed pellet machine

Bai

Zheng

et al. 2020

China Foundry

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The severely worn position and failure mechanisms of the ring die of a feed pellet machine were investigated. The macroscopic and microscopic morphologies of the failed surface, the chemical composition and mechanical properties of the collected samples were analyzed using scanning electron microscopy, energy disperse spectroscopy, optical emission spectrometry, and a universal testing machine. Results show that the dip angle at the entrance of the ring die hole between the roller and ring die was severely worn. The feed powder could not be fully extruded through the dip angle at the entrance of the ring die holes, thus the density of the feed particles produced could not meet the requirements. Therefore, abrasive wear under high stress is the main reason of failure at the entrance of the ring die holes under the action of feeding powder; and cutting and fatigue spalling lead to substantial material loss. In addition, a high damp-heat environment aggravates abrasive wear on the die hole internal surface.

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Section: Discussionmentioning

confidence: 99%

Failure analysis of ring die of a feed pellet machine

Bai

Zheng

et al. 2020

China Foundry

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“…Variable-speed drive Induction motor ω r ω rsp Wind speed The induction motor and the PMSG are in a direct-drive connection; on the other hand, the PMSG is a four-pole three-phase type. One of the advantages of using a generator of low speed type is that the WECS avoid problems related to the use of a gearbox [51][52][53][54], becoming less expensive. In addition, because of the extensive length of its operating speed in the asynchronous mode, PMSG is preferred over other electrical generators [42].…”

Section: Real-time Platformmentioning

confidence: 99%

Wind Power Extraction Optimization by Dynamic Gain Scheduling Approximation Based on Non-Linear Functions for a WECS Based on a PMSG

González-Hernández

Salas-Cabrera

2021

Mathematics

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Mathematical models and algorithms for maximizing power extraction have become an essential topic in renewable energies in the last years, especially in wind energy conversion systems. This study proposes maximum power point tracking using gain scheduling approximations for an emulated wind system in a direct-drive connection. Power extraction is obtained by controlling the duty cycle of a Multilevel Boost Converter, which directly varies the rotational speed of a permanent magnet synchronous generator directly coupled to a three-phase induction motor that emulates the wind turbine. The system’s complexity is linked to the inherent non-linearities associated with the diverse electrical, mechanical, and power electronic elements. In order to present a synthesized model without losing the system dynamic richness, several physical tests were made to obtain parameters for building several mathematical approaches, resulting in non-linear dynamic equations for the controller gains, which are dependant on wind speed. Thirty real operational wind speeds considering typical variations were used in several tests to demonstrate the mathematical models’ performance. Results among these gain scheduling approaches and a typical controller constant gains mathematical model were compared based on standard deviations, absolute error, and the time for reaching the optimum generator angular speed related to every wind speed.

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“…With the development of science and technology, the increasingly harsh conditions of the bearing require higher and higher performance, and the bearing failure inevitably results in the major engineering equipment losses, economic losses, and casualties. 4,5 Therefore, it is of significance to understand the failure mechanism of the pump shaft bearing during operation in order to prevent long-term breakdowns or/and catastrophic failures.…”

Section: Introductionmentioning

confidence: 99%

Failure analysis of automobile engine pump shaft bearing

Guo

Duan

Lei

et al. 2021

Advances in Mechanical Engineering

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The shaft bearing is the key component of water pump and its fatigue failure results in the abnormal operation of the system. However, the failure mechanisms of bearing are still unclear. In this paper, the failure analysis on the engine water pump shaft bearing was carried out by using the measurement of material composition and properties, observation of macro and micro morphologies, and theoretical analysis of fatigue failure. The wear behavior and failure mechanisms were clarified, and the prevention measures was further proposed. The bearing failure reflected from the fracture of bearing cage and serious wear of roller and mandrel. The wear behavior of the mandrel originated from the surface fatigue, and the failure was attributed to the large radial deflection load. Further, the decreased weight of impeller and shaft connector and the increased bearing thickness were recommended to improve the bearing operation.

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Failure analysis on abnormal wear of roller bearings in gearbox for wind turbine

Cited by 39 publications

References 52 publications

Failure analysis of ring die of a feed pellet machine

Failure analysis of ring die of a feed pellet machine

Wind Power Extraction Optimization by Dynamic Gain Scheduling Approximation Based on Non-Linear Functions for a WECS Based on a PMSG

Failure analysis of automobile engine pump shaft bearing

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