ABAQUS-based sealing failure analysis of cryogenic valves under spool deflection

The sealing performance of safety valves relies on a tight fit between the spool and the seat. To avoid jamming, a larger fitting clearance is designed for spool guidance, which makes the spool deflection excessive, leading to a gap in the sealing interface and affecting the sealing performance. Based on ABAQUS, this paper conducts a mechanical analysis of the sealing interface under the conditions of spool deflection and studies the relationships between the spool deflection angles and sealing failure. By analyzing the simulation results, the maximum deflection angles of the spool are determined under the premise of ensuring the sealing performance at different operating temperatures. A complete simulation calculation method is proposed for the study field of valve sealing. The results provide a theoretical basis and reference for the design of fitting clearance and sealing part size of the valve.