Abstract The main interface docking seal (MID seal) is one of the key components in the developing low impact docking systems for future space vehicles, and its sealing property is crucial to the spacecrafts docking in space. A seal-on-seal structure is one of the mainstream designs of the MID seal, and is generally made of rubber materials that can adapt to the complex space environment. For the MID seal of the seal-on-seal structure, it is further confirmed that the porous media theory is suitable to study the sealing property by investigating the micromorphology characteristics of seal contact faces, which based on a leakage model is proposed by this paper. In this model, both the primary seal and the secondary seal are considered as a whole, which is more consistent with the structure and the physical process of sealing face leakage. By comparison with the performed experiments, the leakage model was verified. Based on the proposed leakage model, some simulation results about the studied MID seal are presented and discussed, which mainly correspond with pressure distributions, compression levels, design parameters and operating temperatures. These analyses clearly present some intrinsic relationships implicated in the leakage model. This study is favorable for the mechanism researches, designs, assemblies, and applications of the MID seal, and other seals like that are also included.

中文翻译：

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基于多孔介质法的密封对密封结构泄漏模型

摘要 主界面对接密封件（MID Seal）是未来航天器低冲击对接系统研制的关键部件之一，其密封性能对航天器空间对接至关重要。密封对密封结构是MID密封件的主流设计之一，一般采用橡胶材料制成，能够适应复杂的空间环境。对于密封对密封结构的MID密封，通过研究密封接触面的微观形貌特征，进一步证实了多孔介质理论适用于研究密封性能，本文提出了基于泄漏模型的密封接触面。 . 该模型将主密封和副密封作为一个整体考虑，更符合密封面泄漏的结构和物理过程。通过与所进行的实验进行比较，验证了泄漏模型。基于所提出的泄漏模型，提出并讨论了研究的 MID 密封的一些模拟结果，这些结果主要对应于压力分布、压缩水平、设计参数和工作温度。这些分析清楚地呈现了泄漏模型中涉及的一些内在关系。该研究有利于MID密封的机理研究、设计、组装和应用，也包括其他类似的密封。设计参数和工作温度。这些分析清楚地呈现了泄漏模型中涉及的一些内在关系。该研究有利于MID密封的机理研究、设计、组装和应用，也包括其他类似的密封。设计参数和工作温度。这些分析清楚地呈现了泄漏模型中涉及的一些内在关系。该研究有利于MID密封的机理研究、设计、组装和应用，也包括其他类似的密封。