Deaconescu Andrea, Deaconescu Tudor
Department of Industrial Engineering and Management, Transilvania University of Brasov, 500036 Brasov, Romania.
Polymers (Basel). 2025 May 7;17(9):1275. doi: 10.3390/polym17091275.
Coaxial sealing systems are increasingly used in the construction of hydraulic cylinders. In addition to the seal that ensures the actual packing of the entire system, the O-ring plays an important role in the functioning of the hydraulic subassembly. In order to understand the sealing phenomenon of coaxial systems, a physical and mathematical model of the contact between the O-ring and its contacting surfaces is required. Within this context, this paper presents a calculation method of the pressures generated in the contact areas of the O-ring with its adjacent surfaces, as well as of the widths of the contact areas. The input quantities for these calculations were certain material characteristics (hardness, elasticity modulus, and Poisson's coefficient) of the sealed-off fluid pressure and the specific radial deformation, which is a characteristic that describes the mounting of the O-ring in its groove. This article concludes with recommendations for the mounting of the O-ring and the required characteristics of the used materials.
同轴密封系统在液压缸的构造中越来越多地被使用。除了确保整个系统实际密封的密封件外，O形环在液压组件的运行中也起着重要作用。为了理解同轴系统的密封现象，需要一个关于O形环与其接触表面之间接触的物理和数学模型。在此背景下，本文提出了一种计算方法，用于计算O形环与其相邻表面接触区域中产生的压力以及接触区域的宽度。这些计算的输入量是密封流体压力的某些材料特性（硬度、弹性模量和泊松系数）以及特定的径向变形，该变形是描述O形环在其凹槽中安装情况的一个特性。本文最后给出了关于O形环安装以及所用材料所需特性的建议。
