摘要
针对高性能设计液膜润滑螺旋槽机械密封端面结构问题,结合熵产损失分析方法,开展了螺旋槽机械密封三维湍流流场数值计算与端面结构优化设计;分析了不同密封槽型结构流场压力分布,计算了密封在不同转速与槽深下泄漏率、开启力与熵产损失。研究结果表明:最优螺旋角为20°,槽堰比为0.42,槽坝比为0.63,槽深为13μm,最优密封端面动压开启能力大,流动熵产损失小;密封泄漏率与开启力随转速与槽深线性增大,熵产损失随转速呈抛物线形增大,随槽深变化小。构建的螺旋槽机械密封结构多目标优化设计方法可为低泄漏、低能耗机械密封结构提供设计指导。
Aiming at the high performance design of end face structure for spiral groove mechanical seals with liquid film lubrication,the entropy production loss method was adopted to carry out the numerical calculation of the three-dimensional turbulence flow field and groove optimization design of spiral groove mechanical seal;The pressure distribution of flow fields with different grooves were analyzed;The leakage rate,opening force and entropy production loss of the seal at different speed and groove depth conditions were calculated.The results show that the optimal spiral angle,groove-ridge ratio,groove-dam ratio and groove depth is 20°,0.42,0.63 and 13μm,respectively;the optimal seal end face dynamic pressure opening ability is large,and the flow entropy production loss is small;The leakage rate and opening force increase linearly with the rotational speed and groove depth,the entropy production loss increases parabolically with the rotational speed and vary little with groove depth.The multi-objective optimization design method constructed can provide design guidance for low leakage,and low-energy mechanical seal structures.
作者
郑国运
谢星
丁思云
王永乐
梁彦兵
彭骞
ZHENG Guo-yun;XIE Xing;DING Si-yun;WANG Yong-le;LIANG Yan-bing;PENG Qian(Hefei General Machinery Research Institute Co.,Ltd.,Hefei 230031,China;Sinomach General Machinery Science&Technology Co.,Ltd.,Hefei 230601,China;General Machinery and Key Basic Component Innovation Center(Anhui)Co.,Ltd.,Hefei 230031,China;National Innovation Center for Basic Components of General Machinery,Hefei 230031,China;Advanced Sealing Technology Innovation Center,Hefei 230031,China;Machinery Industry Mechanical Seals Engineering Research Center,Hefei 230031,China)
出处
《液压气动与密封》
2025年第7期9-16,共8页
Hydraulics Pneumatics & Seals
基金
国家重点研发计划(2023YFB3408100)
合肥通用机械研究院有限公司博士科技基金(2022011507)。
关键词
机械密封
螺旋槽
熵产
优化设计
mechanical seal
spiral groove
entropy production
optimization design
作者简介
郑国运(1974-),男,安徽合肥人,工程师,学士,研究方向为机械密封开发应用。
