中文摘要：

采用有限元分析软件Abaqus分析矩形橡胶密封圈初始压缩率、介质压力、橡胶材料硬度、摩擦因数以及轴筒运动速度对密封圈的变形、接触应力和等效应力的影响，并对密封圈的结构进行优化设计。通过分析发现：初始压缩率越大，密封圈的密封效果越好；材料特性和摩擦因数是影响密封性能的重要因素；矩形密封圈不宜用于动密封中；对矩形密封圈与槽壁接触一侧倒角后，可以有效提高密封性能。

英文摘要：

The effect of initial compression ratio, pressure, rubber material hardness, friction coeffi- cient and shaft speed on the deformation, contact stress and equivalent stress of the rectangle rubber seal was analyzed by using Abaqus finite element analysis software,and the structure of rectangle seal was optimized. The results showed that the higher the initial compression ratio was, the better the sealing effect of seal was. The properties of materials and the friction coefficient were the important factors affecting the sealing performance. The rectangle seal was unsuitable for dynamic sealing. When chamfer angle was set on the side of rectangle seal which contacted with the sidewall of sealing slot, the sealing performance could be effectively improved.