An experimental study on the torsional stiffness and limit torque of a jaw coupling with consideration of spacer's hardness and installation methods

IF 1.5 4区 工程技术 Q3 MECHANICS Journal of Mechanics Pub Date : 2022-01-01 DOI:10.1093/jom/ufac018
Chih-Ming Chen, Huey-Ling Chang, Chun-Ying Lee
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Abstract

The jaw coupling with a flexible spacer is frequently used in the torque transmission between shafts with misalignment for machinery. Its torsional stiffness and limit torque closely determine the operational capacity and the dynamic characteristics of the system because the coupling is usually the most flexible link in the driving chain. In this study, the optimal design of a jaw coupling with an elastomeric spacer was investigated using the Taguchi method by considering four design factors: the tightening method of the clamping bolts, the tightening torque of the clamping bolts, the hardness of the thermoplastic polyether ester elastomer spacer and the installation angle between the two end blocks of the coupling. All specimens were tested by using an in-house torsion tester to record the torque-angular deformation responses. The results showed good reliability and repeatability, with a coefficient of variance within 5%. Spacer's hardness was found to be the most significant factor regarding the torsional stiffness, while the magnitude of the clamping torque had the most critical role in the limit torque. The estimation formulae for the torsional stiffness and limit torque of the jaw coupling were obtained by using the statistical regression of the measured data, respectively. Both formulae predicted the performance of the optimal designs within 5% of error compared to the confirmation tests.
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考虑垫片硬度和安装方法的颚式联轴器抗扭刚度和极限转矩试验研究
带柔性垫片的颚式联轴器是机械偏心轴间扭矩传递中常用的一种联轴器。联轴器通常是传动链中最灵活的环节,其抗扭刚度和极限转矩密切决定着系统的运行能力和动态特性。通过考虑夹紧螺栓的紧固方式、夹紧螺栓的紧固力矩、热塑性聚醚酯弹性体垫片的硬度以及联轴器两端块的安装角度等4个设计因素,采用田口法对带弹性体垫片的颚式联轴器进行了优化设计。所有试件均采用内部扭振仪进行测试,记录扭矩-角变形响应。结果具有良好的信度和重复性,方差系数在5%以内。研究发现,隔片硬度对隔片扭转刚度的影响最为显著,夹紧力矩的大小对隔片扭转刚度的影响最为关键。通过对实测数据的统计回归,分别得到了爪形联轴器扭转刚度和极限扭矩的估计公式。与确认试验相比,两个公式预测的最佳设计性能误差在5%以内。
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来源期刊
Journal of Mechanics
Journal of Mechanics 物理-力学
CiteScore
3.20
自引率
11.80%
发文量
20
审稿时长
6 months
期刊介绍: The objective of the Journal of Mechanics is to provide an international forum to foster exchange of ideas among mechanics communities in different parts of world. The Journal of Mechanics publishes original research in all fields of theoretical and applied mechanics. The Journal especially welcomes papers that are related to recent technological advances. The contributions, which may be analytical, experimental or numerical, should be of significance to the progress of mechanics. Papers which are merely illustrations of established principles and procedures will generally not be accepted. Reports that are of technical interest are published as short articles. Review articles are published only by invitation.
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