| 姜晗1,2， 应志平1,2， 王振华3， 彭来湖4*， 袁嫣红1,5.包装箱体面接触式密封泄漏机理及其影响因素[J].轻工机械,2025,43(6):1-7 |
| 包装箱体面接触式密封泄漏机理及其影响因素 |
| Mechanism and Influencing Factors of Contact Sealing Leakage in Packaging Boxes |
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| DOI：10.3969/j.issn.1005 2895.2025.06.001 |
| 中文关键词: 包装 面接触式密封 分形接触理论 弹塑性接触挤压仿真模型 泄漏模型 |
| 英文关键词:包装 面接触式密封 分形接触理论 弹塑性接触挤压仿真模型 泄漏模型 |
| 基金项目:浙江省“尖兵领雁+X”项目：喷气涡流纺纱核心关键技术装备研制（2024SJCZX0027） |
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| 中文摘要: |
| 为探究包装箱体面接触式密封的泄漏机理和影响因素，课题组利用分形接触理论计算接触面积，结合弹塑性接触仿真模型及前人已有的实验数据，验证分形接触模型的有效性，从而获得理论输入参数，建立分形泄漏模型。结果表明：通过分形泄漏模型预测，泄漏量与接触面的分形维数、端面比压和弹性模量呈反比关系，与接触面特征长度参数呈正比关系；通过微观尺度分形接触理论和有限元仿真，揭示了面接触式密封的泄漏机理，粗糙面微凸体发生弹塑性接触变形，但与刚性平面无法完全贴合，致使微凸体间形成泄漏通道；粗糙面分形维数和特征长度参数决定微凸体的数量和幅度，接触材料弹性模量决定微凸体端面比压和变形程度，进而影响接触泄漏量。 |
| 英文摘要: |
| In order to explore the mechanism and influencing factors of surface contact sealing leakage in packaging boxes, the research group used fractal contact theory to calculate the contact area, combined with the elastic plastic contact extrusion simulation model and previous experimental results to verify the effectiveness of the contact theory method, thereby obtaining theoretical input parameters and establishing a fractal leakage model. The results show that the predicted leakage amount through the fractal leakage model is inversely proportional relationship to the fractal dimension, end face specific pressure, and elastic modulus of the contact surface, and directly proportional relationship to the fractal characteristic length of the contact surface. The leakage mechanism of surface contact seals has been revealed through microscale fractal contact theory and finite element simulation. The rough surface micro convex body undergoes elastic plastic contact deformation, but cannot fully fit with the rigid plane, resulting in the formation of leakage channels between the micro convex bodies. The fractal dimension and characteristic length parameters of rough surfaces determine the number and amplitude of micro convex bodies, while the elastic modulus of contact materials determines the end face specific pressure and deformation degree of micro convex bodies, which in turn affects contact leakage. |
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