共查询到20条相似文献,搜索用时 93 毫秒
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在实验、分析的基础上,对往复式液压缸的摩擦力进行了初步的研究,找出了摩擦力与运动之间的关系,为液压缸设计提供了一定的依据。 相似文献
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气缸低摩擦力测量方法的研究 总被引:1,自引:0,他引:1
为了测量新型金属密封气缸的低摩擦力,设计了间测法和直测法两种测量系统。比较实验表明,直测法测量精度高、数据一致性好、动摩擦力测量时可预设速度值,因此更适合于气缸低摩擦力的测量。在此基础上,采用直测法获得了新型金属密封气缸静摩擦力和不同速度下的气缸动摩擦力,为该型气缸的使用提供了基础数据。 相似文献
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HTSD直线滚动导轨副动态摩擦力实验研究 总被引:1,自引:1,他引:0
文章对HTSD直线滚动导轨副的动态摩擦力波动进行了实验研究,并将实验结果与理论计算进行了比较,分析了引志导轨副摩擦力波动的可能原因。 相似文献
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H型钢轧制过程摩擦力分布的数值分析 总被引:2,自引:0,他引:2
为了分析万能法轧制H型钢过程中不同接触区内摩擦力分布的规律,利用数值模拟法建立了H型钢的轧制模型。以铅为坯料,在给定轧制规程的前提下,系统地模拟了H型钢轧制的全过程;分析了翼缘和腹板变形区的长度、宽度等参数;最终获得了稳态轧制过程中摩擦力在不同接触区域内的矢量分布规律。研究结果表明:H型钢翼缘表层金属受到的摩擦力的方向指向变形区的中部,翼缘变形区存在前滑区和后滑区;H型钢腹板表面金属受到的摩擦力的方向一致,与轧制的方向相反,使得接触区基本为后滑区。 相似文献
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The goal of this work was to assess the suitability of a commercial synthetic skin to simulate occluded human skin friction behavior in dry and moist skin conditions and under different applied surface pressures, with the view to using this material as a tribological test bed for health care and personal care devices that are in direct contact with the skin during use. A flat rotating ring friction measurement device, in which one part of the skin surface is continuously covered (i.e., occluded), was used to compare the friction behavior of human skin and the synthetic skin in controlled nominally dry and nominally moist skin conditions. Three loading levels were tested, simulating light, medium, and high skin pressures typical of many lifestyle- and personal health–related applications. The results showed that the friction behavior of the synthetic skin tested was notably different to that of human skin in vivo in terms of the effects of skin hydration, sliding time, and applied surface pressure. It is concluded that, for use as a tribological test bed, the tested synthetic skin model does not provide an acceptable alternative to in vivo tests using human skin. 相似文献
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By rheology experiments we show that the torque created by sliding friction between a polyurethane foam planarizing pad and patterned silicon dioxide wafer in contact creates a large second-order tensile normal force previously found only in the torsion of bulk specimens. The normal force is a linear function of the square of the torque. Such tensile force reduces the applied compressive force. With elaborate polishing experiments we found second-order normal extension of the polymer into the valleys of the opposing surface which by interlocking the interface may provide a new mechanism for friction. 相似文献
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汤亮 《机械制造与自动化》2003,(4):77-79
指纹鼠标开发目的是将具有唯一性、稳定性的生物特征用于计算机用户身份识别,加强计算机信息安全。核心是把现场采集的指纹特征与存储的指纹通过可靠的匹配算法验证用户身份。根据鼠标内部较大空间、贴片式指纹识别芯片及微处理器体积很小特点,开发出集鼠标与用户身份识别功能于一体的“指纹鼠标”,既方便快捷、又唯一可靠。主要介绍“指纹鼠标”技术基础、方案设计、开发要点、特点应用等。 相似文献
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橡胶密封件作为阀门产品的重要零部件,橡胶密封件的摩擦磨损性能直接影响其密封性和阀门产品寿命可靠性。针对低温橡胶硫化密封件进行密封力仿真确定,开展相关摩擦磨损试验。在干摩擦与脂润滑条件下,利用摩擦磨损试验机,测试不同摩擦配副之间的摩擦磨损性能,获得接触面表面形貌以及不同橡胶密封副之间的摩擦磨损量。结果表明:性能表现最佳的橡胶材料为氢化丁腈橡胶HNBR5080和耐磨丁腈橡胶A-4-1-J18。实验数据可为后续的阀门产品设计提供技术支撑。 相似文献