基于微凸体侧接触模型的机械密封端面混合摩擦热理论预测
发布时间：2018-11-10 12:32
【摘要】：基于微凸体侧接触模型,推导了机械密封端面混合摩擦热计算式,研究了转速、摩擦间隙和粗糙度对常用机械密封端面混合摩擦热的影响。结果表明:常用混合摩擦状态下的机械密封端面微凸体接触多为第II类弹塑性接触;当转速ω?2 800r/min时,微凸体接触摩擦热所占比重较大,但随着转速上升,黏性摩擦热比重逐渐增大至百分之百;随着摩擦间隙d的增大,黏性摩擦热和微凸体接触摩擦热曲线均呈下降趋势,当d?2.8σ时,微凸体接触摩擦热减小至零,而黏性摩擦热随d变化不大;随着粗糙度的增加,端面摩擦热先下降后上升,在近1.6μm处最小,因而在机械密封设计时,存在某一粗糙度使混合摩擦热最少。
[Abstract]:Based on the lateral contact model of micro-convex body, the formula for calculating the friction heat of mechanical seal end face is derived, and the effects of rotating speed, friction clearance and roughness on the friction heat of mechanical seal end face are studied. The results show that the contact of the microconvex body on the end face of the mechanical seal under the condition of mixed friction is the II type elastoplastic contact. When the rotational speed is 蠅? 2 800r/min, the proportion of contact friction heat of microconvex body is larger, but with the increase of rotational speed, the specific gravity of viscous friction heat gradually increases to 100%. With the increase of the friction gap d, the friction heat curves of both the viscous friction heat and the microconvex body show a downward trend. When d is 2.8 蟽, the contact friction heat of the convex body decreases to zero, while the viscous friction heat does not change with d. With the increase of roughness, the friction heat of the end face decreases first and then rises to the minimum at about 1.6 渭 m. Therefore, in the design of mechanical seals, the existence of a certain roughness makes the mixing friction heat minimum.
【作者单位】： 南京林业大学机械电子工程学院;
【基金】：国家自然科学基金(51375245,51505230) 江苏省六大人才高峰(BZZ-037) 江苏省高校优势学科建设工程 南京林业大学优秀博士论文创新基金和扬州市科学发展计划(YZ2014092)资助项目
【分类号】：TH136
[Abstract]:Based on the lateral contact model of micro-convex body, the formula for calculating the friction heat of mechanical seal end face is derived, and the effects of rotating speed, friction clearance and roughness on the friction heat of mechanical seal end face are studied. The results show that the contact of the microconvex body on the end face of the mechanical seal under the condition of mixed friction is the II type elastoplastic contact. When the rotational speed is 蠅? 2 800r/min, the proportion of contact friction heat of microconvex body is larger, but with the increase of rotational speed, the specific gravity of viscous friction heat gradually increases to 100%. With the increase of the friction gap d, the friction heat curves of both the viscous friction heat and the microconvex body show a downward trend. When d is 2.8 蟽, the contact friction heat of the convex body decreases to zero, while the viscous friction heat does not change with d. With the increase of roughness, the friction heat of the end face decreases first and then rises to the minimum at about 1.6 渭 m. Therefore, in the design of mechanical seals, the existence of a certain roughness makes the mixing friction heat minimum.
【作者单位】： 南京林业大学机械电子工程学院;
【基金】：国家自然科学基金(51375245,51505230) 江苏省六大人才高峰(BZZ-037) 江苏省高校优势学科建设工程 南京林业大学优秀博士论文创新基金和扬州市科学发展计划(YZ2014092)资助项目
【分类号】：TH136
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