A study on the wear behavior of tin-based journal bearing under different working conditions

Abstract

Purpose The purpose of this paper is to study the friction and wear properties of journal bearings under different working conditions. Design/methodology/approach Friction coefficient and wear losses of journal bearing under different working conditions have been determined by a bearing test rig. The worn surfaces of bearing were examined by scanning electron microscopy and laser three-dimensional micro-imaging profile measurements, and the tribological behavior and wear mechanisms were investigated. Findings The wear loss and friction coefficient of bearing under starting-stopping working condition is far greater than that of steady-state working conditions. In addition, the maximum wear loss under start-up and stop conditions is about 120 times of that under stable operating conditions. Under stable working conditions, the main wear forms of bearings are abrasive wear, under starting-stopping working conditions the main wear mechanisms of bearings are adhesion wear, abrasive wear and fatigue wear. Originality/value These research results have certain practical value for understanding the tribology behavior of journal bearings under different working conditions.

Spirit Kerja Karyawan Masa Pandemi Covid 19

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Jelatin ve PVA kaplı nanopartiküller ile EP yağ katkısının tribolojik performanslarının araştırılması

“…Uygun yağlayıcı ve yağ katışkılarının kullanımı ile yatakların yorulma dayanımı, dolayısıyla çalışma ömrü arttırılabilmektedir. Günümüzde yatak malzemesi olarak kalay bronzları yaygın olarak kullanılmaktadır [1][2][3]. Bu alaşımlar yüksek korozyon ve aşınma direncine, yüksek termal iletkenliğe ve kendinden yağlanma özelliklerine sahiptirler [4][5][6].…”

Analysis of damage evolution and causative factors of outer raceway micromorphology of small needle roller bearings under impact load

“…The dynamic effects generated by the random loads on the road surface caused by the vehicle during travel can interact with tribology (Govardhan et al , 2014; Zhao et al , 2021; Questa et al , 2021; Raadnui and Kleesuwan, 2011; Zhang et al , 2022; Wang et al , 2021), which can accelerate bearing wear. Many scholars have explored the effect of the impact caused by train start-stop on the premature failure of bearings (Li et al , 2019; Tu et al , 2018; Liu et al , 2016; Sun et al , 2015; Evans et al , 2016). The results of studies based on the measured load spectrum of motor train unit show that the angular acceleration and changing radial force generated during the start-stop phase significantly affect the load on the bearing elements, and the start-stop conditions in the entry and exit sections contribute more to the bearing wear.…”