Research on the Torsional Behavior of Rubber O-ring of Reciprocating Seals Under Eccentric Operating Conditions
To study the torsional behavior of the O-ring under eccentric working conditions of reciprocating seals,a three-dimensional model was established based on ABAQUS finite element software to simulate the service state of the sealing ring under eccentric working conditions.By changing parameters such as compression rate,eccentricity,and medium pressure,the torsional behavior of the O-ring under different working conditions was analyzed,and the reasons for the tor-sion were preliminarily analyzed.The influence of compression rate,medium pressure,and eccentricity on the torsion angle,as well as the changes in leakage and friction force under torsion state were discussed.The results indicate that a sudden change in contact stress occurs at the torsion point when the rotation angle is greater than 1.6°.During the external stroke,as the compression rate and the torsion angle increase,the contact pressure of the sealing surface at the torsion point de-creases.Reducing eccentricity helps to suppress the occurrence of torsion,and an appropriate range of fluid pressure can also reduce torsion.The eccentric working condition has a significant impact on the leakage and friction force of the sealing ring per unit length.The leakage decreases and the friction force increases on the compression side,which will worsen the lubrication state of the area and accelerate wear failure.The contact pressure on the relaxation side is relatively small and the leakage increases,which is not conducive to sealing.
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