CAJ | 학술논문

为实现车用发动机轴承工作可靠、耐久目的，应用摩擦学理论及发动机CAE技术对现有机型曲柄连杆机构工作过程进行分析，研究轴承间隙极限状态下轴承比压、轴心轨迹、最小油膜厚度随发动机转速的变化关系，从中对轴承润滑可靠性进行评价。研究结果表明，在发动机本体及边界条件未变下，曲轴主轴承最小油膜厚度随转速增大而减小，连杆大头轴承则随转速增大先增大后减小，最大轴承间隙下的最小油膜厚度比最小间隙下大40％，轴承均未出现干摩擦现象，波纹状轴瓦润滑性能优于平状轴瓦。
위실현차용발동궤축승공작가고、내구목적，응용마찰학이론급발동궤CAE기술대현유궤형곡병련간궤구공작과정진행분석，연구축승간극겁한상태하축승비압、축심궤적、최소유막후도수발동궤전속적변화관계，종중대축승윤활가고성진행평개。연구결과표명，재발동궤본체급변계조건미변하，곡축주축승최소유막후도수전속증대이감소，련간대두축승칙수전속증대선증대후감소，최대축승간극하적최소유막후도비최소간극하대40％，축승균미출현간마찰현상，파문상축와윤활성능우우평상축와。
To achieve the purposes of bearing working reliable and durable,tribology and engine CAE technology were applied to analyze the bearing special pressure,bearing orbit and minimum film thickness in bearing clearance limit state, and reliability of the bearing lubrication was evaluated. The results show that,the minimum film thickness of main bear-ings are decreased with engine speed increased in engine body and boundary conditions unchanged,which the connecting rod bearings are increased first and then decreased. The minimum film thickness of maximum bearing clearances is 40%larger than that of minimum bearing clearances,the phenomenon of dry friction is not met,lubrication performance of cor-rugated bearing shell is better than that of flat bearing.