共查询到20条相似文献,搜索用时 109 毫秒
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环境友好润滑剂的特点及发展 总被引:26,自引:3,他引:26
阐述了绿色友好润滑剂的生物降解性和摩擦化学特点,提出了环境友好润滑剂在发展过程中存在的主要问题,并对未来的发展趋势进行了预测。 相似文献
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阐述了绿色友好润滑剂的生物降解性和摩擦化学特点,提出了绿色润滑剂在发展过程中存在的主要问题,并对未来的发展趋势进行了预测。 相似文献
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环境友好润滑剂及其添加剂的摩擦学研究现状 总被引:27,自引:11,他引:27
综述了环境友好润滑剂及其添加剂的定义、分类及应用,介绍了生物降解润滑剂的定义及其试验方法与分类;简要介绍了生态毒性和基础的氧化稳定性试验方法;概述了国外环境友好润滑剂的发展状况,指出了国内开展相关研究工作的紧迫性。 相似文献
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金属冷塑成型用润滑剂研究 总被引:3,自引:0,他引:3
研究了蓖麻油加入二硫化钼、铝粉、石墨等添加剂后摩擦磨损性能以及极压性能的变化。用四球摩擦磨损试验机进行对比实验,研究了二硫化钼、铝粉、石墨、磁流体对摩擦因数、磨损的影响。结果表明:(1)蓖麻油为基础油,添加二硫化钼等添加剂,能提高蓖麻油的减摩、抗磨和极压性能。(2)含MoS210 g/L,A l粉30 g/L,石墨50 g/L的蓖麻油其减摩、抗磨和极压性能最好。(3)二硫化钼能起到极压添加剂的作用;A l粉能提高润滑油的稳定性;石墨含量是影响润滑剂摩擦因数最主要因素。 相似文献
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Tae-Ho Song 《Journal of Mechanical Science and Technology》1991,5(1):10-15
Laminar natural convection induced by free surface temperature gradient has been investigated numerically. Buoyancy effect
and surface tension effect were made to oppose against each other. For fluid of unit Prandtl number and cavity of unit aspect
ratio, the flow field was examined to determine the relative importance of surface tension force and buoyancy force. The flow
patterns of each regime are: free surface-concentrated streamlines for surface tension flows, opposite direction circulation
for buoyancy driven flows, and surface tension cell above with buoyancy driven cell below for mixed flows. The borderlines
of each flow regime were obtained by interpolation and the flow regime map was obtained. 相似文献
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硅钢机组张力辊打滑现象的分析和解决措施 总被引:1,自引:0,他引:1
结合硅钢机组的实际运转情况,对张力辊的工况和受力进行理论分析,得出了张力辊产生打滑的几种可能原因,最后针对这些原因提出了相应的解决措施,并同时还在从控制的角度上对有效地防止张力辊打滑现象的出现进行了一定的探讨. 相似文献
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吊环法表面张力自动测量仪的研究 总被引:5,自引:0,他引:5
本文在国内外现有吊环法表面张力测量仪的基础上又做了一些自动化测量方面的研究,以拉力传感器测量方式代替扭力丝转盘测量方式。使吊环法对液体表面张力的测量具有更高的精度 相似文献
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Theoretical investigations are carried out for a plain journal bearing considering the influence of thermal effects on non-Newtonian lubrication. With reasonable assumptions, the steady state and dynamic characteristics are presented using a thermohydrodynamic analysis of a bearing lubricated by a nonlinear, i.e., cubic, fluid model. Experiments are conducted on a rig to study the steady state and dynamic performance of a full journal bearing with different types of non-Newtonian lubricants. Experiments include the measurements of eccentricity ratio, critical speed, and stability limit. The theoretical investigation reveals that the interaction of the non-Newtonian effect and the thermohydrodynamic effect is strong for friction, and the interaction effect is negligible in the case of eccentricity ratio, attitude angle, and lubricant flow rate. Further, for relatively high values of non-Newtonian parameter, αn , the effect due to the non-Newtonian parameter is not negligible. 相似文献