CAJ | 학술논문

采用汉氏法求解雷诺方程，计算出不稳定载荷下滑动轴承在不同偏心率和动力参数条件下的油膜无量纲承载力，并根据实测的发动机气缸压力计算出活塞销所承受的负荷。然后根据实际负荷与油膜承载力的平衡关系，计算出动载荷下每一时刻的油膜厚度，从而确定活塞销轴心在连杆小头铜套中的运动轨迹。计算结果表明，连杆在整个运行周期中，绝大部分时间承受压缩载荷，且压缩载荷远比拉伸载荷大。此结果可用于发动机活塞连杆组的结构设计与故障诊断中，并能对一些实际故障现象进行合理的理论解释。
채용한씨법구해뢰낙방정，계산출불은정재하하활동축승재불동편심솔화동력삼수조건하적유막무량강승재력，병근거실측적발동궤기항압력계산출활새소소승수적부하。연후근거실제부하여유막승재력적평형관계，계산출동재하하매일시각적유막후도，종이학정활새소축심재련간소두동투중적운동궤적。계산결과표명，련간재정개운행주기중，절대부분시간승수압축재하，차압축재하원비랍신재하대。차결과가용우발동궤활새련간조적결구설계여고장진단중，병능대일사실제고장현상진행합리적이론해석。
Adopting Hamn's method to solve Reynolds equation,in this paperthe dimensionless bearing capacity of the oil film in sliding bearings under unstable load with different eccentricities and kinetic parameters is calculated.Basing on the pressure measured in the engine cylinder,the load of the piston pin is accounted.Then according to the balance relation between the load of the piston pin and the bearing capacity of the oil film,we can decide the moving orbit of the piston pin in the connecting-rod bush by means of the oil film thickness calculated at each moment under the dynamic load.The result shows that the connecting rod is compressed during most running time while the compressed force of connecting rod is much bigger than the pulled force.Making use of the result we could not only design more reasonable structure of piston connecting rod and diagnose the trouble of piston pin more easily,but also explain many practiced phenomena of trouble.