工程热塑性齿轮过早和扩展接触行为及其在齿轮运动学中影响的数值研究

IF 1.7 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Multidiscipline Modeling in Materials and Structures Pub Date : 2023-05-24 DOI:10.1108/mmms-11-2022-0242
S. Vignesh, A. Johnney Mertens
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引用次数: 0

摘要

目的本研究旨在确定热塑性齿轮在不发生长时间接触的情况下所能承受的最大载荷。聚合物齿轮的延伸接触在基本设计计算中通常被忽视,尽管它会极大地影响齿轮的承载能力。尽管不同的研究人员强调了这一现象,但对长时间接触行为的广泛调查是有限的。因此,本工作旨在研究热塑性齿轮的过早和扩展接触行为及其对齿轮运动学、弯曲刚度、引起的应力和齿轮副所面对的滚动角的影响。设计/方法/方法该工作使用有限元方法对啮合轮齿进行准静态二维分析。在AutoCAD中开发了有限元模型,并使用ANSYS 19.1仿真软件包进行了分析。具有所有齿的三维齿轮模型对于解决静态分析问题是计算密集型的。因此,考虑减少齿数的平面分析,以减少计算时间和难度。发现由于载荷分担增加,接近路径对中心的滚动角高于凹陷路径。接触应力分布在过早和延长的接触区域中遵循独特的R-F-R-F模式,这是由于被驱动的尖端驱动器侧面表面接触。建立了一个无量纲参数,该参数与杨氏模量、施加的载荷和引起的挠度相关,可用于预测热塑性齿轮中过早和长期接触的发生。独创性/价值聚合物齿轮的齿轮额定值标准是根据传统金属齿轮制定的,不包括轮齿偏转的影响。该工作试图解释各种标准热塑性塑料的轮齿偏转及其在运动学中的影响。同样,引入了一个新的无量纲数来预测扩展接触,这将有助于适当选择负载,降低磨损的可能性。
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Numerical investigation on the premature and extended contact behaviour of engineering thermoplastic gears and its effect in gear kinematics
PurposeThis research work aims to determine the maximum load a thermoplastic gear can withstand without the occurrence of extended contact. The extended contact of polymer gears is usually overlooked in basic design calculations, although it considerably affects the gear's load-carrying ability. Although various researchers highlighted the phenomenon, an extensive investigation of the extended contact behaviour is limited. Hence the work aims to investigate the premature and extended contact behaviour of thermoplastic gears and its effect in the gear kinematics, bending stiffness, stresses induced and the roll angle subtended by the gear pair.Design/methodology/approachThe work uses finite element method to perform quasi-static two-dimensional analysis of the meshing gear teeth. The FE model was developed in AutoCAD and analysed using ANSYS 19.1 simulation package. A three-dimensional gear model with all the teeth is computationally intensive for solving a static analysis problem. Hence, planar analysis with a reduced number of teeth is considered to reduce the computational time and difficulty.FindingsThe roll angle subtended at the centre by the path of approach is higher than the path of recess because of the increased load sharing. The contact stress profile followed a unique R-F-R-F pattern in the premature and extended contact regions due to the driven tip-driver flank surface contact. A non-dimensional parameter was formulated correlating the young's modulus, the load applied and deflection induced that can be utilised to predict the occurrence of premature and extended contact in thermoplastic gears.Originality/valueThe gear rating standards for polymer gears are formulated from the conventional metal gears which does not include the effect of gear tooth deflection. The work attempts to explain the gear tooth deflection for various standard thermoplastics and its effect in kinematics. Likewise, a new dimensionless number was introduced to predict the extended contact that will help in appropriate selection of load reducing the possibility of wear.
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来源期刊
CiteScore
3.70
自引率
5.00%
发文量
60
期刊介绍: Multidiscipline Modeling in Materials and Structures is published by Emerald Group Publishing Limited from 2010
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