Analysis and Experimental Validation of the Tribological and Dynamic Characteristics of Journal Bearings

Sliding bearings are the main kinematic pair of a Stirling engine, and one of the main sources of friction power loss and excitation force. There is a coupling effect between the lubrication state and the excitation force. In this paper, the dynamic model of a Sapphire bearing fatigue test bed, whic...

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Autores principales:	Yang Xin, Gu Genxiang, Sun Sicong, Li Saili, Zhou Jianming
Formato:	article
Lenguaje:	EN FR
Publicado:	EDP Sciences 2021
Materias:	journal bearing bearing bush elasto-hydrodynamic (ehd) multibody dynamics Environmental sciences GE1-350
Acceso en línea:	https://doaj.org/article/712ad777a5914c699dd5c488292cfd83
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spelling	oai:doaj.org-article:712ad777a5914c699dd5c488292cfd832021-11-08T15:18:56ZAnalysis and Experimental Validation of the Tribological and Dynamic Characteristics of Journal Bearings2267-124210.1051/e3sconf/202131302001https://doaj.org/article/712ad777a5914c699dd5c488292cfd832021-01-01T00:00:00Zhttps://www.e3s-conferences.org/articles/e3sconf/pdf/2021/89/e3sconf_isec2021_02001.pdfhttps://doaj.org/toc/2267-1242Sliding bearings are the main kinematic pair of a Stirling engine, and one of the main sources of friction power loss and excitation force. There is a coupling effect between the lubrication state and the excitation force. In this paper, the dynamic model of a Sapphire bearing fatigue test bed, which includes thermo-elasto-hydrodynamic (EHD) property, is established and the accuracy of the model is verified by the experimental data. Based on the model, the effects of the load, the oil supply temperature, the oil supply pressure, the bearing clearance on the tribological and dynamic characteristics are studied. With an increase in the load, the orbital path of the journal moves downward, the lubrication state changes from the full hydrodynamic lubrication to the boundary lubrication, the friction power loss increases, and the bearing excitation frequency increases. Due to the decrease of the oil viscosity, the hydraulic friction power loss decreases, but the friction power loss derived from the asperity contact increase, so does the total friction power loss. With the increase of the radial clearance, the shape of the orbital path and the minimum oil film thickness remain unchanged. The increase of the bearing clearance results in the collisions between the journal and bearing bush, thus the amplitude of the frequency multiplication component in the bearing load increases, and the asperity and the total friction power loss increase.Yang XinGu GenxiangSun SicongLi SailiZhou JianmingEDP Sciencesarticlejournal bearingbearing bushelasto-hydrodynamic (ehd)multibody dynamicsEnvironmental sciencesGE1-350ENFRE3S Web of Conferences, Vol 313, p 02001 (2021)
institution	DOAJ
collection	DOAJ
language	EN FR
topic	journal bearing bearing bush elasto-hydrodynamic (ehd) multibody dynamics Environmental sciences GE1-350
spellingShingle	journal bearing bearing bush elasto-hydrodynamic (ehd) multibody dynamics Environmental sciences GE1-350 Yang Xin Gu Genxiang Sun Sicong Li Saili Zhou Jianming Analysis and Experimental Validation of the Tribological and Dynamic Characteristics of Journal Bearings
description	Sliding bearings are the main kinematic pair of a Stirling engine, and one of the main sources of friction power loss and excitation force. There is a coupling effect between the lubrication state and the excitation force. In this paper, the dynamic model of a Sapphire bearing fatigue test bed, which includes thermo-elasto-hydrodynamic (EHD) property, is established and the accuracy of the model is verified by the experimental data. Based on the model, the effects of the load, the oil supply temperature, the oil supply pressure, the bearing clearance on the tribological and dynamic characteristics are studied. With an increase in the load, the orbital path of the journal moves downward, the lubrication state changes from the full hydrodynamic lubrication to the boundary lubrication, the friction power loss increases, and the bearing excitation frequency increases. Due to the decrease of the oil viscosity, the hydraulic friction power loss decreases, but the friction power loss derived from the asperity contact increase, so does the total friction power loss. With the increase of the radial clearance, the shape of the orbital path and the minimum oil film thickness remain unchanged. The increase of the bearing clearance results in the collisions between the journal and bearing bush, thus the amplitude of the frequency multiplication component in the bearing load increases, and the asperity and the total friction power loss increase.
format	article
author	Yang Xin Gu Genxiang Sun Sicong Li Saili Zhou Jianming
author_facet	Yang Xin Gu Genxiang Sun Sicong Li Saili Zhou Jianming
author_sort	Yang Xin
title	Analysis and Experimental Validation of the Tribological and Dynamic Characteristics of Journal Bearings
title_short	Analysis and Experimental Validation of the Tribological and Dynamic Characteristics of Journal Bearings
title_full	Analysis and Experimental Validation of the Tribological and Dynamic Characteristics of Journal Bearings
title_fullStr	Analysis and Experimental Validation of the Tribological and Dynamic Characteristics of Journal Bearings
title_full_unstemmed	Analysis and Experimental Validation of the Tribological and Dynamic Characteristics of Journal Bearings
title_sort	analysis and experimental validation of the tribological and dynamic characteristics of journal bearings
publisher	EDP Sciences
publishDate	2021
url	https://doaj.org/article/712ad777a5914c699dd5c488292cfd83
work_keys_str_mv	AT yangxin analysisandexperimentalvalidationofthetribologicalanddynamiccharacteristicsofjournalbearings AT gugenxiang analysisandexperimentalvalidationofthetribologicalanddynamiccharacteristicsofjournalbearings AT sunsicong analysisandexperimentalvalidationofthetribologicalanddynamiccharacteristicsofjournalbearings AT lisaili analysisandexperimentalvalidationofthetribologicalanddynamiccharacteristicsofjournalbearings AT zhoujianming analysisandexperimentalvalidationofthetribologicalanddynamiccharacteristicsofjournalbearings
_version_	1718441959624802304

Analysis and Experimental Validation of the Tribological and Dynamic Characteristics of Journal Bearings

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