Local Effects in EHL Contacts with Oil-Impregnated Sintered Materials
Local Effects in EHL Contacts with Oil-Impregnated Sintered Materials
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DOI：
10.3390/lubricants7010001
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发表时间：
2018-12
期刊：
影响因子：
3.5
通讯作者：
M. Ebner;M. Omasta;T. Lohner;P. Sperka;I. Křupka;M. Hartl;K. Michaelis;B. Höhn;K. Stahl
中科院分区：
文献类型：
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作者：
M. Ebner;M. Omasta;T. Lohner;P. Sperka;I. Křupka;M. Hartl;K. Michaelis;B. Höhn;K. Stahl
油浸开孔烧结材料可用于提供摩擦学接触的固有自润滑。虽然它的一般功能最近被确认为高负载接触，在摩擦接触表面孔隙率的局部影响的详细分析是必要的，以了解和改善其操作行为。在这种情况下，本研究调查的影响，不同的表面光洁度在双盘试验台，和表面孔隙率在弹性流体动力润滑（EHL）接触的光学摩擦计的局部影响，薄膜比色干涉法的基础上。结果表明，高表面孔隙率对操作行为的不利影响。在弹流润滑接触润滑油膜的局部观察表明，存在“开放”的孔隙，导致局部膜击穿，和“封闭”的孔隙，运输额外的润滑剂进入加压区。需要适当的表面处理技术来制造具有足够机械强度的低渗透层。
Oil-impregnated open-pored sintered materials can be used to provide the intrinsic self-lubrication of tribological contacts. Although its general functionality was recently confirmed for highly-loaded contacts, detailed analyses on the local effects of surface porosity in tribological contacts are required in order to understand and improve its operating behavior. In this context, this study investigates the influence of different surface finishes at a twin-disk test rig, and the local effects of surface porosity in elastohydrodynamically lubricated (EHL) contacts at an optical tribometer, based on thin film colorimetric interferometry. The results show the detrimental influence of high surface porosity on the operating behavior. Local observations of the lubricant film in EHL contacts indicate the presence of “open” pores, resulting in local film breakdown, and “closed” pores, transporting the additional lubricant into the pressurized zone. An appropriate surface finish technique to manufacture a low permeable layer with an adequate mechanical strength is demanded.