润滑与密封
潤滑與密封
윤활여밀봉
LUBRICATION ENGINEERING
2013年
12期
15-17
,共3页
分形维数%表面形貌%布朗运动维数%多重分形谱
分形維數%錶麵形貌%佈朗運動維數%多重分形譜
분형유수%표면형모%포랑운동유수%다중분형보
fractal dimension%surface topography%fractal Brown dimension%multi-fractal spectrum
为了分析负载和润滑油对缸套表面形貌的影响，采用布朗分形维数和多重分形谱定量表征不同工况下表面形貌分形特征及其高度的均一性。各工况条件下缸套表面平整程度由好到差依次为20 MPa 稳定实验，20 MPa 贫油实验（未拉缸），40 MPa 稳定实验，20 MPa 贫油实验（拉缸），未磨原试样。缸套表面高度均一性由好到差依次为20 MPa 稳定实验，20 MPa 贫油实验（未拉缸），40 MPa 稳定实验，20 MPa 贫油实验（拉缸），未磨原试样。分析结果表明，负载小时润滑充分可减小表面的磨损；增大负载时由于进入工作表面的润滑油减少，表面磨损加剧。
為瞭分析負載和潤滑油對缸套錶麵形貌的影響，採用佈朗分形維數和多重分形譜定量錶徵不同工況下錶麵形貌分形特徵及其高度的均一性。各工況條件下缸套錶麵平整程度由好到差依次為20 MPa 穩定實驗，20 MPa 貧油實驗（未拉缸），40 MPa 穩定實驗，20 MPa 貧油實驗（拉缸），未磨原試樣。缸套錶麵高度均一性由好到差依次為20 MPa 穩定實驗，20 MPa 貧油實驗（未拉缸），40 MPa 穩定實驗，20 MPa 貧油實驗（拉缸），未磨原試樣。分析結果錶明，負載小時潤滑充分可減小錶麵的磨損；增大負載時由于進入工作錶麵的潤滑油減少，錶麵磨損加劇。
위료분석부재화윤활유대항투표면형모적영향，채용포랑분형유수화다중분형보정량표정불동공황하표면형모분형특정급기고도적균일성。각공황조건하항투표면평정정도유호도차의차위20 MPa 은정실험，20 MPa 빈유실험（미랍항），40 MPa 은정실험，20 MPa 빈유실험（랍항），미마원시양。항투표면고도균일성유호도차의차위20 MPa 은정실험，20 MPa 빈유실험（미랍항），40 MPa 은정실험，20 MPa 빈유실험（랍항），미마원시양。분석결과표명，부재소시윤활충분가감소표면적마손；증대부재시유우진입공작표면적윤활유감소，표면마손가극。
In order to analyze the influences of heavy load and lubricating oil on cylinder liner's surface topography, Brown's fractal dimension and multi-fractal spectrum were used to quantitatively characterize the fractal features and height homogeneity of its surface topography in different working conditions.In different conditions the leveling degrees of cylin-der liner's surface were in order from good to bad:in sufficient lubrication and stable working in 20 MPa,in deficient lu-brication and unstable working in 20 MPa (no cylinder scoring),in sufficient lubrication and stable working in 40 MPa, in deficient lubrication and unstable working in 20 MPa (cylinder scoring),in original state before experiments.In differ-ent conditions the height homogeneity of its surface topography were in order from good to bad:in sufficient lubrication and stable working in 20 MPa,in deficient lubrication and unstable working in 20 MPa (no cylinder scoring),in sufficient lu-brication and stable working in 40 MPa,in deficient lubrication and unstable working in 20 MPa (cylinder scoring),in original state before experiments.The result of the study dictates that the surface wear of cylinder liner is reduced at low load and sufficient lubrication condition,while the surface wear is increased at heavy load due to the decrease of lubrica-ting oil into the work surface.
