本文選題：船用柴油機 + 彈流潤滑�。� 參考：《潤滑與密封》2016年12期

【摘要】：根據(jù)動載滑動軸承彈流潤滑相關(guān)理論,將有限元法與非線性多體動力學(xué)相結(jié)合,計入摩擦表面的粗糙度、軸瓦與軸頸的彈性變形、供油特性等因素,分析船用二沖程柴油機十字頭軸承潤滑狀況。結(jié)果表明,在整個工作循環(huán)內(nèi),十字頭軸承始終受壓,承受壓應(yīng)力;軸承載荷的峰值出現(xiàn)在缸內(nèi)氣壓最大的時刻;十字頭軸承軸心的運動軌跡始終坐落于下半?yún)^(qū)域的較小范圍內(nèi),高油壓區(qū)域相對集中;軸承下瓦開設(shè)油槽,降低了承壓能力,峰值油膜厚度較小;在軸承摩擦面的光潔度很高的情況下,粗糙接觸壓力較小且持續(xù)時間短,對軸承的正常工作影響不大;整個工作循環(huán)內(nèi)絕大部分為液動摩擦,粗糙接觸摩擦功耗相對較小。
[Abstract]:According to the theory of elastohydrodynamic lubrication of dynamic sliding bearing, the finite element method is combined with nonlinear multi-body dynamics to take into account the roughness of friction surface, the elastic deformation of bearing and journal, the characteristics of oil supply, etc.The lubrication condition of cross-head bearing of two stroke marine diesel engine is analyzed.The results show that, in the whole working cycle, the cross-head bearing is always under pressure and bearing compressive stress, and the peak value of bearing load occurs at the time of the maximum pressure in the cylinder.The movement track of the axial center of the cross-head bearing is always located in the smaller range of the lower half area, the high oil pressure area is relatively concentrated, the oil groove is set up under the bearing shoe, the bearing bearing bearing has lower bearing capacity and the peak oil film thickness is smaller.Under the condition of high finish of bearing friction surface, the rough contact pressure is small and the duration is short, so it has little effect on the normal operation of bearing; the whole working cycle is mostly hydrodynamic friction, and the power consumption of rough contact friction is relatively small.
【作者單位】： 上海海事大學(xué)商船學(xué)院;大連海事大學(xué)輪機工程學(xué)院;
【分類號】：U664.121

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