【摘要】 使用ABAQUS软件建立了O形密封圈有无挡圈配合两种情况下的二维轴对称模型,分析其在较小介质压力时的力学性能以及在较大介质压力下的变形情况,并分析压缩率和介质压力对O形圈与箱体内壁接触面上的最大接触应力的影响。结果表明:介质压力较小时,均能满足密封要求;介质压力较大时,无挡圈配合的O形圈会出现间隙咬伤现象,有挡圈配合的O形圈则不会出现此现象,说明在介质压力较大时O形圈应当配合挡圈使用,O形圈与箱体内壁接触面上的最大接触应力与压缩率和介质压力这两个参数均近似呈正比例关系。更多还原

【Abstract】 A finite element model for O-ring with and without matching retainer ring is built based on the soft-ware ABAQUS. The mechanical properties of O-ring under small medium pressure and the deformation under large medium pressure are analyzed. The influence of compression ratio and medium pressure on the maximum contact stress of O-ring with retainer is further analyzed. The results show that when the medium pressure is small,the two conditions can meet the sealing requirements. When the medium pressure is large,the O-ring with no retainer ring is squeezed into the gap due to excessive deformation,leading to a gap bite,while the O-ring with the retainer ring is not deformed. This indicates that the O-ring should be matched with a retainer ring when the medium pressure is large. The maximum contact stress on the contact surface between the O-ring and the inner wall of the box is approximately proportional to the compression ratio and the medium pressure.更多还原