Study on the sealing performance of O-rings under the combined effects of temperature and oil pressure
ZHANG Hang
HU Qingshan
JING Ye
YUAN Zhenyi
KONG Lingfei
Abstract：To address the sealing issue of an aircraft actuator,a two-dimensional axisymmetric simulation model of O-ring sealing under the combined effects of temperature and oil pressure was established using ANSYS software.The study systematically investigated the influence of backup ring presence,operating temperature,and O-ring diameter on contact pressure.The introduction of a backup ring increases the contact pressure of the O-ring,thereby preventing"extrusion"failure.Under the ultimate oil pressure of 27 MPa,the contact pressure of the O-ring at-55 ℃ operating environment is 1.9 MPa lower than that at room temperature.As the O-ring diameter increases,the contact pressure between the O-ring and the cover plate also rises.When the O-ring diameter is less than 1.50 mm,there exists a leakage risk at-55 ℃.The research findings provide theoretical guidance for the sealing design of O-rings.
Keywords：sealing performanceO-ringfinite element methodhyperelasticcombined effects of tempera-ture and pressure
Publication Date：2025-07-20
Online Publishing Date：2025-09-08(First online date of this platform, not the publication date of the document)
Pages：6( 99-104 )