共查询到18条相似文献,搜索用时 65 毫秒
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研究了钢-钢摩擦副在干摩擦、水润滑、酒精润滑和60 N油润滑等条件下的摩擦磨损行为。结果表明:润滑介质可以显著降低钢-钢摩擦副的摩擦系数,在干摩擦、水润滑、酒精润滑和60N油润滑,摩擦载荷为(50~200)g(钢球半径为2 mm)时摩擦系数的平均值分别为0.75~0.81,0.45~0.33,0.22~0.15,0.13~0.09;在高载荷下酒精润滑与油润滑磨损速率相差甚小,并且在摩擦磨损初期阶段(500 s之内)摩擦系数相差甚少;同时,酒精润滑条件下的磨损表面形貌与油润滑下的磨损表面形貌极为相似,无明显粘着现象。分析表明,酒精润滑是一种绿色润滑介质,在压延、拉伸工业中有良好的应用前景。 相似文献
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水作为液压介质必须解决润滑性能差、渗透泄漏性强、腐蚀与气蚀等三大关键技术问题。本文探讨了水液压元件的润滑与密封、腐蚀与气蚀及摩擦与磨损机理.并提出相应的解决措施。 相似文献
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本文是重新估计润滑状态的一种新的探讨——利用铁谱技术对摩擦界面间存在的磨柱进行观察分析。论证了磨粒对润滑状态的影响及其统计的尺寸分布规律。进而提出润滑状态可靠性的计算方法。 相似文献
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水润滑陶瓷轴承的试验研究 总被引:11,自引:7,他引:11
使用Sialon,ZrO2和Al2O3陶瓷材料,进行了水润滑条件下的滚动轴承和滑动轴承的试验研究,比较和分析了各种陶瓷材料的疲劳和磨损特性,滚动轴承中Sialon球的寿命最长,Al2O3球的寿命最短,滑动轴承试验中Sialon的摩擦系数最小,而ZrO2的磨损较大,借助扫描电子显微镜和X射线能谱分析讨论了陶瓷的疲劳和磨损机理。 相似文献
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A simple dynamic friction model for an elastohydrodynamic lubrication sliding and rolling line contact has been developed. This model uses the technique introduced earlier by Harnoy and Friedland (1). The model includes low-velocity regions where friction is a combination of contact and elastohydrodynamic friction. The study shows that the lime-variable friction is not only a function of instantaneous sliding velocity, but is also a memory function of the velocity history. Simulation of the model for an oscillating velocity exhibits similar hysteresis effects in friction-velocity curves as observed earlier in several experimental studies. The model can be useful for friction compensation to enhance the precision of motion in control systems. 相似文献
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Miki Nakano Atsuko Korenaga Atsushi Korenaga Koji Miyake Takashi Murakami Yasuhisa Ando Hatsuhiko Usami Shinya Sasaki 《Tribology Letters》2007,28(2):131-137
The tribological properties of cast iron have been investigated to determine the effects of micro-texturing the surfaces.
The micro-textured surfaces were prepared by shot blasting or milling using a shaper. The surfaces with groove patterns and
mesh patterns had higher friction coefficients than the flat surfaces. The surfaces with dimpled patterns had lower friction
coefficients than the flat surfaces. The results indicated that the dimpled pattern had a beneficial effect by decreasing
the friction. 相似文献