Molecular Spur Gears with Triptycene Rotators and a Norbornane-Based Stator.
Organic Letters, 2020We report efforts to prepare a molecular spur gear utilizing a convenient synthesis of a norbornane stator that positions two interdigitated diyne-linked triptycenes in parallel alignment.
Xing Jiang +4 more
semanticscholar +1 more source
Tolerance analysis of spur gears based on skin model shapes and a boundary element method
, 2020Tolerance analysis is an important approach for evaluating the accuracy and function of mechanical products. Research on tolerance analysis has mainly focused on the transfer and accumulation of geometric deviations during assembly, while the effects of ...
Nan Shao, Xiao-Yu Ding, Jianhua Liu
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A model to predict initiation and propagation of micro-pitting on tooth flanks of spur gears
International Journal of Fatigue, 2019Micro-pitting is an early-stage failure mode commonly found in gears. It leads to macro-pitting, spalling, and even tooth fracture failure, which cause destructive damage to gearboxes. A simulation model to predict the initiation and propagation of micro-
Xiangyang Xu +5 more
semanticscholar +1 more source
Influence of surface topography on the friction and dynamic characteristics of spur gears
, 2020As an important excitation source of gear dynamic problems, the time-varying friction of tooth surface is closely related to its topography. Considering the friction characteristics of tooth surface is of great significance to improve the calculation ...
Zhi Li +4 more
semanticscholar +1 more source
Dynamical modeling and experimental validation for tooth pitting and spalling in spur gears
Mechanical systems and signal processing, 2019Dynamical modeling of a gear system with faults has been an important research topic for understanding fault features and their associated fault vibration mechanisms.
Yang Luo, N. Baddour, M. Liang
semanticscholar +1 more source
Due to the lack of efficient formulas, fillet foundation stiffness under double tooth engagement has long been a challenging problem for mesh stiffness calculation of spur gears by analytical method. Direct summation of the mesh stiffness of each meshing
Chongyang Xie +5 more
semanticscholar +1 more source
An analytical method for calculating the tooth surface contact stress of spur gears with tip relief
International Journal of Mechanical Sciences, 2019Spur gears with tip relief can effectively improve transmission performance, and accurate determination of their tooth surface contact stress (TSCS) can provide guidance for structure optimization and performance evaluation.
Q. Wen, Qun-Gui Du, Xiao-Chen Zhai
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Crack detection for spur gears with asymmetric teeth based on the dynamic transmission error
Mechanism and Machine Theory, 2019Gears are one of the most important power transmission elements in every area of the industry. Because of its importance, the gear design must be carefully performed.
Oğuz Doğan, F. Karpat
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Three-dimensional mixed lubrication analysis of spur gears with machined roughness
, 2019The timing gears of the ship internal combustion engine usually undergo dynamic loading conditions, and often work in a mixed lubrication state. In this study, by considering the three-dimensional (3D) machined roughness, an integrated model with the ...
Xiu-Jiang Shi +6 more
semanticscholar +1 more source
A new calculation method for tooth fillet foundation stiffness of cracked spur gears
, 2020General calculation methods for tooth fillet foundation stiffness will generate significant errors in the rim crack case. In order to solve this problem, a new calculation method is proposed in this paper, which is capable of taking both tooth and rim ...
Lantao Yang +4 more
semanticscholar +1 more source