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| 1 | 接触式机械密封端面平均温度耦合计算方法显示文摘研究接触式机械密封端面平均温度与端面摩擦因数相耦合的计算方法问题。将机械密封环简化为等截面当量筒体,推导出了接触式机械密封端面平均温度的计算式,给出了密封环简化为当量筒体的具体方法;基于分形理论,建立了接触式机械密封端面摩擦因数计算模型。考虑端面平均温度与端面摩擦因数的相互耦合关系,提出了端面平均温度的具体计算方法。通过模拟计算,对B104a-70型机械密封端面平均温度的影响因素进行了分析。结果表明,端面平均温度随着弹簧比压或密封流体压力的增大,线性地增大;随着转速的增大,近似线性地增大,且端面越光滑,线性越好,增大的幅度也越大;随着端面分形维数的增大或特征尺度系数的减小,非线性地增大,当端面较粗糙时,端面平均温度的变化较小;当端面较光滑时,随着端面分形维数的增大或特征尺度系数的减小,端面平均温度迅速增大。 | 魏龙 顾伯勤 刘其和 张鹏高 房桂芳 | 2014 | 化工学报2014，65，9： | 15 |
| 2 | Influence of groove surface texture on temperature rise under dry sliding friction显示文摘Parallel groove surface textures with different area densities were fabricated on ASTM 1045 steel. Friction tests were conducted under dry sliding condition. Temperature rise, friction coefficient and wear of both the textured and untextured specimens were studied. An embedded K-type thermocouple beneath the friction surfaces was employed to measure frictional temperature rise. The results indicated that the temperature rise of the textured specimen was obviously reduced compared with that of the untextured specimen, although the difference between the friction coefficients was not significant. The specimen with high texture density exhibited a small temperature rise. The difference in temperature rise between the specimens with different texture densities can be primarily attributed to differences in heat dissipation and energy allocation between the tribo-pairs caused by the textured structure. The energy consumed by wear and plastic deformation was small in comparison with the total energy input by friction, thus, the influence of these factors on temperature rise can be considered to be negligible. | WU Wei SHAO TianMin CHEN GuiMing | 2016 | Science China(Technological Sciences)2016，59，2： | 15 |
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