CAJ | 학술논문

基于活塞二阶运动方程和裙部流体动压润滑模型，建立了活塞和缸套的结构动力学模型，以分析缸套弹性变形对活塞二阶运动和裙部润滑特性的影响。结果表明：不同曲轴转角下缸套的变形不同，做功行程中变形明显，而且最大变形量出现的区域随转角的变化而改变；考虑缸套弹性变形后，活塞二阶运动有所加剧，在压缩和做功行程中更加明显；在做功行程中裙部最小油膜厚度明显减小，而总摩擦功耗显著增加，在其它行程中两者均无显著改变；油膜压力场峰值变小，在进气和做功行程中减小明显，但压力场分布基本不变。
기우활새이계운동방정화군부류체동압윤활모형，건립료활새화항투적결구동역학모형，이분석항투탄성변형대활새이계운동화군부윤활특성적영향。결과표명：불동곡축전각하항투적변형불동，주공행정중변형명현，이차최대변형량출현적구역수전각적변화이개변；고필항투탄성변형후，활새이계운동유소가극，재압축화주공행정중경가명현；재주공행정중군부최소유막후도명현감소，이총마찰공모현저증가，재기타행정중량자균무현저개변；유막압력장봉치변소，재진기화주공행정중감소명현，단압력장분포기본불변。
Based on piston 2nd-order motion equation and piston skirt lubrication model, a structural dy-namics model for piston and liner is established to analyze the effects of liner elastic deformation on piston 2 nd-order motion and piston skirt lubrication characteristics. The results show that the liner elastic deformations vary at differ-ent crank angles, which are more apparent in work stroke, and the areas where the largest deformation occurs also vary with crank angle. With consideration of liner elastic deformation, the 2nd-order motion of piston is magnified, which is more obvious in compression and work strokes, the least oil film thickness at piston skirt obviously reduces and the total friction work consumed significantly increases in work stroke, but they have no apparent change in oth-er strokes, and the oil film pressure peak reduces, which is more apparent in intake and work strokes, while the distribution of pressure field basically remains unchanged.