润滑与密封
潤滑與密封
윤활여밀봉
LUBRICATION ENGINEERING
2014年
3期
33-37
,共5页
内燃机%微凸体接触%热弹性流体润滑%滑动轴承
內燃機%微凸體接觸%熱彈性流體潤滑%滑動軸承
내연궤%미철체접촉%열탄성류체윤활%활동축승
internal combustion engine%micro convex body contact%thermoelastohydrodynamic lubrication%sliding bearing
基于GREENWOOD和TRIPP微凸体接触理论，计入温度、弹性变形等影响因素，建立内燃机主轴承的数学模型和实体模型，计算研究其润滑性能与表面粗糙度之间的关系。结果表明，计入表面粗糙度后，由于微凸体接触力相对较小，油膜压力略有增加，油膜温度变化不大，摩擦功没有显著的增加；粗糙表面增大粗糙接触压力，造成轴颈不对中倾斜程度加剧；随着表面粗糙度的增加，油膜压力降低，厚度增加，峰值粗糙接触压力增大。
基于GREENWOOD和TRIPP微凸體接觸理論，計入溫度、彈性變形等影響因素，建立內燃機主軸承的數學模型和實體模型，計算研究其潤滑性能與錶麵粗糙度之間的關繫。結果錶明，計入錶麵粗糙度後，由于微凸體接觸力相對較小，油膜壓力略有增加，油膜溫度變化不大，摩抆功沒有顯著的增加；粗糙錶麵增大粗糙接觸壓力，造成軸頸不對中傾斜程度加劇；隨著錶麵粗糙度的增加，油膜壓力降低，厚度增加，峰值粗糙接觸壓力增大。
기우GREENWOOD화TRIPP미철체접촉이론，계입온도、탄성변형등영향인소，건립내연궤주축승적수학모형화실체모형，계산연구기윤활성능여표면조조도지간적관계。결과표명，계입표면조조도후，유우미철체접촉력상대교소，유막압력략유증가，유막온도변화불대，마찰공몰유현저적증가；조조표면증대조조접촉압력，조성축경불대중경사정도가극；수착표면조조도적증가，유막압력강저，후도증가，봉치조조접촉압력증대。
Based on the theory of GREENWOOD and TRIPP micro convex body contact,the mathematic model and enti-ty model of the main bearings of internal combustion engine(ICE)were established considering the influence factors such as temperature,elastic deformation,etc,the relationship between main bearings' lubrication performance and its surface roughness was studied.The results show that the film pressure and friction loss power are increased slightly,the oil film temperature changes little,because of relatively small asperity contact force.Rough surface of the bearing increases asperity contact pressure,causes the journal misalignment.With the increase of surface roughness,the oil film pressure is reduced, the thickness is increased,the rough peak contact pressure is increased.
