旋转桥球形铰链结构的摩擦特性和润滑性能

IF 3.1 3区 工程技术 Q2 ENGINEERING, MECHANICAL Lubricants Pub Date : 2024-04-15 DOI:10.3390/lubricants12040130
Yingsong Li, Wei Guo, Xiaoming Huang, Zeqi Chen, Ying Gao
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引用次数: 0

摘要

球形铰链结构是旋转桥梁的关键部件,在评估摩擦特性和润滑性能以满足旋转要求时必须考虑到这一点。基于聚四氟乙烯(PTFE)的球形铰链滑块和润滑涂层已使用了 20 多年,但随着旋转桥梁建造吨位的不断增加,其润滑性能可能无法满足要求。在本手稿中,通过有限元分析方法获得了球形铰链的最佳摩擦系数。制备了四种润滑涂层和四种球形铰链滑块,并通过自行开发的旋转摩擦系数试验、四球形机试验、动态剪切流变试验以及压缩和剪切性能试验来评估球形铰链结构的润滑和摩擦性能。有限元分析结果表明,球形铰链结构的最佳旋转摩擦系数为 0.031-1.131。试验结果表明,石墨烯润滑涂层的摩擦系数、磨损痕直径、最大非咬合载荷、相变点和触变环面积分别为 0.065、0.79 mm、426 N、14.6% 和 64,878 Pa/s。与传统的聚四氟乙烯润滑涂层相比,石墨烯润滑涂层有不同程度的改进,显示出更优异的润滑性能、承载能力、触变性和结构强度。压缩和剪切试验表明,聚醚醚酮(PEEK)具有良好的压缩和剪切机械性能。PEEK 的最大压缩应力比传统 PTFE 高 87.7%,剪切强度是 PTFE 的 6.07 倍。该研究成果可显著提高球形铰链结构的耐磨性,降低其摩擦系数,从而降低牵引能耗,确保桥梁平稳、精确地旋转。
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Friction Characteristics and Lubrication Properties of Spherical Hinge Structure of Swivel Bridge
A spherical hinge structure is a key swivel bridge element that must be considered when evaluating friction characteristics and lubrication properties to meet the rotation requirement. Polytetrafluoroethylene (PTFE)-based spherical hinge sliders and lubrication coating have been employed for over 20 years, but with the growing tonnage of swivel bridge construction, their capacity to accommodate the required lubrication properties can be exceeded. In this manuscript, the optimal friction coefficient of the spherical hinge is obtained through the finite element analysis method. Four lubrication coatings and four spherical hinge sliders are prepared and tested through a self-developed rotation friction coefficient test, four-ball machine test, dynamic shear rheological test, and compression and shear performance test to evaluate the lubrication and friction properties of the spherical hinge structure. The results of the finite element analysis show that the optimum rotation friction coefficient of the spherical hinge structure is 0.031–1.131. The test results illustrate that the friction coefficient, wear scar diameter, maximum non-seize load, phase transition point, and thixotropic ring area of graphene lubrication coating are 0.065, 0.79 mm, 426 N, 14.6%, and 64,878 Pa/s. The graphene lubrication coating has different degrees of improvement compared with conventional polytetrafluoroethylene lubrication coating, showing more excellent lubrication properties, bearing capacity, thixotropy, and structural strength. Compressive and shear tests demonstrate that polyether ether ketone (PEEK) has good compressive and shear mechanical properties. The maximum compressive stress of PEEK is 87.7% higher than conventional PTFE, and the shear strength of PEEK is 6.07 times higher than that of PTFE. The research results can provide significantly greater wear resistance and a lower friction coefficient of the spherical hinge structure, leading to lower traction energy consumption and ensuring smooth and precise bridge rotation.
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来源期刊
Lubricants
Lubricants Engineering-Mechanical Engineering
CiteScore
3.60
自引率
25.70%
发文量
293
审稿时长
11 weeks
期刊介绍: This journal is dedicated to the field of Tribology and closely related disciplines. This includes the fundamentals of the following topics: -Lubrication, comprising hydrostatics, hydrodynamics, elastohydrodynamics, mixed and boundary regimes of lubrication -Friction, comprising viscous shear, Newtonian and non-Newtonian traction, boundary friction -Wear, including adhesion, abrasion, tribo-corrosion, scuffing and scoring -Cavitation and erosion -Sub-surface stressing, fatigue spalling, pitting, micro-pitting -Contact Mechanics: elasticity, elasto-plasticity, adhesion, viscoelasticity, poroelasticity, coatings and solid lubricants, layered bonded and unbonded solids -Surface Science: topography, tribo-film formation, lubricant–surface combination, surface texturing, micro-hydrodynamics, micro-elastohydrodynamics -Rheology: Newtonian, non-Newtonian fluids, dilatants, pseudo-plastics, thixotropy, shear thinning -Physical chemistry of lubricants, boundary active species, adsorption, bonding
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