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Mesh relationship modeling and dynamic characteristic analysis of external spur gears with gear wear

Frontiers of Mechanical Engineering 2022年第1期17卷 160-177页

作者： Zhixian SHEN Laihao YANG Baijie QIAO Wei LUO Xuefeng CHEN Ruqiang YAN School of Mechanical Engineering Xi’an Jiaotong UniversityXi’an 710049China State Key Laboratory for Manufacturing Systems Engineering Xi’an Jiaotong UniversityXi’an 710061China

gear wear is one of the most common gear failures,which changes the mesh relationship of normal gear.A new mesh relationship caused by gear wear affects meshing excitations,such as mesh stiffness and transmission error,and further increases vibration and noise *** paper aims to establish the model of mesh relationship and reveal the vibration characteristics of external spur gears with gear wear.A geometric model for a new mesh relationship with gear wear is proposed,which is utilized to evaluate the influence of gear wear on mesh stiffness and unloaded static transmission error(USTE).Based on the mesh stiffness and USTE considering gear wear,a gear dynamic model is established,and the vibration characteristics of gear wear are numerically *** with the experimental results verifies the proposed dynamic model based on the new mesh *** numerical and experimental results indicate that gear wear does not change the structure of the spectrum,but it alters the amplitude of the meshing frequencies and their *** condition indicators,such as root-mean-square,kurtosis,and first-order meshing frequency amplitude,can be regarded as important bases for judging gear wear state.

关键词： gear wear mesh relationship mesh stiffness transmission error vibration characteristics

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Acoustics Based Monitoring and Diagnostics for the Progressive Deterioration of Helical gearboxes

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Chinese Journal of Mechanical Engineering 2021年第4期34卷 98-109页

作者： Kaibo Lu James Xi Gu Hongwei Fan Xiuquan Sun Bing Li Fengshou Gu College of Mechanical and Vehicle Engineering Taiyuan University of TechnologyTaiyuan 030024China School of Engineering University of BoltonBolton BL35ABUK College of Mechanical Engineering Xi’an University of Science and TechnologyXi’an 710054China Centre for Efficiency and Performance Engineering University of HuddersfieldHuddersfield HD13DHUK. School of Industrial Automation Beijing Institute of TechnologyZhuhai 519088China

gearbox condition monitoring(CM)plays a significant role in ensuring the operational reliability and efficiency of a wide range of critical industrial systems such as wind turbines and *** and timely diagnosis of gear faults will improve the maintenance of gearboxes operating under sub-optimal conditions,avoid excessive energy consumption and prevent avoidable damages to *** study focuses on developing CM for a multi-stage helical gearbox using airborne *** on signal phase alignments,Modulation Signal Bispectrum(MSB)analysis allows random noise and interrupting events in sound signals to be suppressed greatly and obtains nonlinear modulation features in association with gear *** coherence is evaluated for selecting the reliable bi-spectral peaks for indication of gear deterioration.A run-to-failure test of two industrial gearboxes was tested under various loading *** omnidirectional microphones were fixed near the gearboxes to sense acoustic information during *** has been shown that compared against vibration based CM,acoustics can perceive the responses of vibration in a larger areas and contains more comprehensive and stable information related to gear dynamics variation due to ***,the MSB magnitude peaks at the first three harmonic components of gear mesh and rotation components are demonstrated to be sufficient in characterizing the gradual deterioration of gear ***,the combining of MSB peaks with baseline normalization yields more accurate monitoring trends and diagnostics,allowing the gradual deterioration process and gear wear location to be represented more consistently.

关键词： Acoustics Modulation Signal Bispectrum Helical gearbox gear wear

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Investigation on the wear of spur gears generated by modified cutter

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Friction 2021年第2期9卷 288-300页

作者： Fangyan ZHENG Jun ZHANG Ligang YAO Rulong TAN School of Automotive Engineering Wuhan University of TechnologyWuhan 430070China School of Mechanical Engineering and Automation Fuzhou UniversityFuzhou 350116China School of Mechanical Engineering Chongqing University of TechnologyChongqing 400000China

Tooth surface wear damage is one of the main causes of gearing system *** wear leads to tooth profile loss and an increase in transmission errors,as the worn gear surfaces are no longer ***,the enhancement of gear durability against wear is important for gear *** works show that cutter modification can aid in reducing the tool wear in gear processing,while the wear performance of the gears produced by modified cutters is still ***,this study focuses on the wear performance of the gear generated by modified *** results show that the wear resistance can be enhanced through proper cutter modification.

关键词： gear wear cutter modification gear modification

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Keynote Summaries of the First International Symposium on Dynamics,Monitoring,and Diagnostics

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Journal of Dynamics, Monitoring and Diagnostics 2022年第4期1卷 189-199页

作者： JDMD Editorial Office Jérôme Antoni P.Stephan Heyns Jing Lin Huajiang Ouyang Stephan Schmidt Wade A.Smith Daniel N.Wilke Editorial Office of JDMD Chongqing University of TechnologyChongqingChina Laboratoire Vibrations Acoustique Univ LyonINSA LyonLVAEA67769621 VilleurbanneFrance Centre for Asset Integrity Management University of PretoriaPretoriaSouth Africa School of Reliability and Systems Engineering Beihang UniversityBeijingChina School of Engineering University of LiverpoolLiverpoolUK School of Mechanical and Manufacturing Engineering University of New South WalesSydneyAustralia

The first International Symposium on Dynamics,Monitoring,and Diagnostics was held in Chongqing,China,in April *** Symposium,which was attended both virtually and in person,had an audience of 2000 and was aimed at enhancing the intelligence of condition monitoring for engineering *** the Symposium,five keynote addresses were delivered by world leading experts,and this paper is comprised of summaries of these addresses to ensure that the important messages of these speakers are properly on record and readily able to be referenced.

关键词： Eigen-structure assignment gear wear gear diagnostics information theory intelligent diagnosis machinery maintenance passive vibration control prognostics structural modification

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