机械密封织构化表面粗糙度效应的有限元模型与摩擦学特性分析  

Finite Element Model and Tribological Properties Analysis of Textured Mechanical Seals Considering Roughness Effect

作　　者：陈文杰 孟祥铠[1] 王玉明 梁杨杨 彭旭东[1] CHEN Wenjie;MENG Xiangkai;WANG Yuming;LIANG Yangyang;PENG Xudong(Department of Mechanical Engineering,Zhejiang University of Technology,Zhejiang Hangzhou 310012,China)

机构地区：[1]浙江工业大学机械工程学院

出　　处：《摩擦学学报》2019年第5期523-531,共9页Tribology

基　　金：浙江省自然科学基金项目(LY17E050018);国家自然科学基金项目(51775505)和国家自然科学基金-航天基金项目(U1737202)资助~~

摘　　要：为研究粗糙度效应对机械密封织构化端面承载能力、摩擦学特性以及密封性能的影响,基于有限元法建立了机械密封的混合润滑模型,针对确定性非高斯随机分布粗糙表面,考虑润滑液膜的宏微观空化作用和粗糙峰的接触,研究了圆孔型织构化机械密封的摩擦学性能和密封性能.结果表明:平衡状态下处于全膜润滑区间的非高斯型粗糙织构表面,在研究范围内均方根值越大的表面其减摩效果越好,且泄漏率越大,从混合润滑区到全膜润滑区转变的速度也随之增大;非高斯表面的偏态值和峰态值对密封表面的承载能力,润滑性能以及密封性能有影响,但无明显规律;在混合润滑区,圆孔织构具有增摩效果,而在全膜润滑区表现出减摩效果.To study the surface roughness effect on the load-carrying capacity(LCC),tribological performance and sealing performance of the textured mechanical seals,a mixed lubrication model was established based on the finite element method.Considering the microscopic and macroscopic film cavitation effect and asperities contact,the tribological properties and sealing performance of circular-pored mechanical seals with the deterministic non-Gaussian distributed asperities on the face were studied.The results show that,for the mechanical face seals operating in the fullfilm lubrication zone,the larger theσvalue of the non-Gaussian rough textured surfaces,the better the friction-reducing effect was and the larger the leakage rate and the transferring speed of the mixed lubrication zone to the full film lubrication zone were.The skewness and kurtosis values of the non-Gaussian surface had an effect on the LCC,lubrication performance and sealing performance,but no specific law was found.The surface textures showed the effect of increasing friction in the mixed lubrication zone,while exhibited the anti-friction effect in the full-film lubrication zone.

关 键 词：表面粗糙度 机械密封 有限元 液膜空化 表面织构 

分 类 号：TH117.2[机械工程—机械设计及理论]