| 基于正交试验的曲轴油封结构参数研究 |
| Study on Structural Parameters of Crankshaft Oil Seal Based on Orthogonal Test |
| 投稿时间：2020-09-03 修订日期：2020-09-03 |
| DOI：10.12136/j.issn.1000-890X.2021.02.0091 |
| 中文关键词: 曲轴油封 结构参数 密封性能 唇口接触压力 径向力 正交试验 有限元分析 |
| 英文关键词: crankshaft oil seal structural parameter sealing performance lip contact pressure radial force orthogonal test finite element analysis |
| 基金项目:重庆人文科技学院自然科学?课题（CRKZK19018） |
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| 中文摘要: |
| 为研究发动机曲轴油封结构参数对密封性能的影响，以规格为Φ80×Φ100×8.5的曲轴油封为研究对象，基于正交试验设计原理，结合有限元分析方法，研究结构参数油面唇角（α）、气面唇角（β）、安装过盈量（δ）、弹簧中心到唇口轴向距离（r）、油封腰厚（s）和弹簧劲度系数（k）对唇口平均接触压力（Pav）和唇口单位周长径向力（Fr）影响的大小顺序；优化目标为最大Pav和最小Fr，得到最优结构参数组合。结果表明：结构参数对Pav和Fr影响的大小顺序分别为β，δ，k，s，α，r和k，δ，r，s，β，α；与优化前曲轴油封相比，优化后曲轴油封的Pav增大2.61%，Fr减小28.74%，使用寿命显著延长。 |
| 英文摘要: |
| In order to study the influence of the structural parameters of the engine crankshaft oil seal on the sealing performance of the oil seal，the crankshaft oil seal with the specification of Φ80× Φ100×8.5 was taken as research object.Based on the principle of orthogonal experimental design，combined with finite element analysis method，the order of the influence of the structural parameters which were oil level lip angle（α），gas level lip angle（β），installation interference（δ），axial distance from spring center to lip（r），oil seal waist thickness（s） and spring stiffness coefficient（k） on average contact pressure（Pav） and radial force per unit circumference（Fr） of the lip were studied.The optimization objectives were maximum Pav and minimum Fr，and the optimal combination of structural parameters was obtained.The results showed that the order of the influence of the structural parameters on Pav and Fr were β，δ，k，s，α，r and k，δ，r，s，β，α，respectively.Compared with the crankshaft oil seal before optimization，Pav of the crankshaft oil seal after optimization increased by 2.61%，Fr decreased by 28.74%，and service life was prolonged evidently. |
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