Study on failure mechanism and sealing performance optimization of compression packer

天然橡胶 圆柱 材料科学 压缩(物理) 变形(气象学) 复合材料 极限抗拉强度 有限元法 压力(语言学) 接触力学 结构工程 半径 工程类 机械工程 语言学 哲学 计算机安全 计算机科学
作者
Liu Yang,Liqin Qian,Jiayan Zou,Chengyu Xia,Zhanghua Lian
出处
期刊:Engineering Failure Analysis [Elsevier BV]
卷期号:136: 106176-106176 被引量:25
标识
DOI:10.1016/j.engfailanal.2022.106176
摘要

In order to accurately describe the mechanical behavior of rubber materials, and the uniaxial tensile and uniaxial compression experiments of three common rubber materials of packer are carried out combined with the function requirements of the rubber cylinder of packer. In addition, the sealing performance of the compression packer is studied in the setting stage by using the finite element software based on the investigation and analysis of the hyper elastic mechanical properties and constitutive models of rubber materials in this paper. It is found that contact deformation of the rubber cylinder begins to accelerate as the time increases through the analysis. When the packer completes sealing process, the upper rubber cylinder mainly plays a sealing role, and excessive stress will cause the shoulder of the upper rubber cylinder to be compressed and fatigue failure. The contact sealing performance of expanded rubber cylinder under different radius clearance and different pressure difference is studied. Under the given wall thickness and radius clearance, the limit pressure load is applied, the rubber cylinder is in a safe working state, and the sealing width is close to the contact length of the rubber cylinder, which ensures good sealing performance. Moreover, the rubber cylinder is in a good elastic deformation range without serious backlog.
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