润滑与密封
潤滑與密封
윤활여밀봉
LUBRICATION ENGINEERING
2014年
8期
1-7
,共7页
张建军%杨沛然%郭峰%王静
張建軍%楊沛然%郭峰%王靜
장건군%양패연%곽봉%왕정
热弹性流体动力润滑%点接触%时变效应%油膜凹陷%横向振动
熱彈性流體動力潤滑%點接觸%時變效應%油膜凹陷%橫嚮振動
열탄성류체동력윤활%점접촉%시변효응%유막요함%횡향진동
thermal elastohydrodynamic lubrication%point contact%transient effect%dimple%transverse vibration
数值模拟接触固体的横向振动对点接触热弹性流体动力润滑的影响。结果揭示出接触固体的微小横向振动就会造成接触区中油膜压力、膜厚和温度的显著变化,接触区中产生多重凹陷并不断移动。重载下由于动态效应产生的凹陷的移动和合并及热效应的作用,使得膜厚不但不随载荷的增加而减小,反而随载荷的增加而增加。
數值模擬接觸固體的橫嚮振動對點接觸熱彈性流體動力潤滑的影響。結果揭示齣接觸固體的微小橫嚮振動就會造成接觸區中油膜壓力、膜厚和溫度的顯著變化,接觸區中產生多重凹陷併不斷移動。重載下由于動態效應產生的凹陷的移動和閤併及熱效應的作用,使得膜厚不但不隨載荷的增加而減小,反而隨載荷的增加而增加。
수치모의접촉고체적횡향진동대점접촉열탄성류체동력윤활적영향。결과게시출접촉고체적미소횡향진동취회조성접촉구중유막압력、막후화온도적현저변화,접촉구중산생다중요함병불단이동。중재하유우동태효응산생적요함적이동화합병급열효응적작용,사득막후불단불수재하적증가이감소,반이수재하적증가이증가。
The influence of the transverse vibration of the contact solid on point contact thermal elastohydrodynamic lu-brication(EHL)was explored numerically. It is revealed that a tiny transverse vibration of the solid can cause significant changes in oil film pressure,film thickness and temperature,and multi-dimple featured film profile is formed and moved in the contact zone. Due to thermal effect,film thickness is increased but not decreased with the increase of load.