目的 提升金属高压密封环的静密封性能，保证HPD柴油机油泵体的密封效果。方法 基于逾渗理论与静密封原理，采用有限元仿真分析，研究密封环接触区微织构结构及分布特征对密封性能的影响规律，进而设计出在特定工况下密封环微织构的分布特征与几何尺寸。结果 在给定的工况下，确定在泵盖表面构造5处环状圆弧截面微织构。分别为:处于密封环上端面中心位置处，深度为30 μm、宽度为200 μm微织构;距密封环上端面中心位置0.3 mm左右两端，深度为15 μm、宽度为220 μm微织构;距离密封环上端面中心位置0.7 mm左右两端，深度为3 μm、宽度为260 μm微织构。所设计的微织构在不减少有效接触宽度的前提下，显著提升了局部接触压强值，从而提升了高压接触区密封性能。结论 微织构的存在会显著提升微织构两侧的接触压强峰值，且不影响其他接触区的接触压强分布。弧形截面的微织构相较于其他形状截面，性能最优。随着微织构深度的增加，接触压强峰值增加，但接触压强变化幅度越大，接触状态越不稳定;随着宽度的增加，接触压强峰值减小，但接触压强变化幅度越小，接触状态越稳定。多个微织构的密封环相比于单个微织构，接触状态有一定程度的改善。

To improve the static sealing performance of the metal high-pressure sealing ring and ensure the sealing effect of the HPD diesel engine pump body, based on the percolation theory and static sealing principle, uses finite element simulation analysis to study the influence of the micro-texture structure and distribution characteristics of the seal ring contact area on the sealing performance, and then design the distribution characteristics and geometric dimensions of the micro-texture of the seal ring under specific working conditions. Under given working conditions, it is determined that five circular arc cross-section micro textures are constructed on the surface of the pump cover. The micro-textures are respectively located at the center of the upper surface of the seal ring with a depth of 30 μm and a width of 200 μm, a distance of 0.3 mm from the center of the upper surface of the seal ring with a depth of 15 μm and a width of 220 μm, and a distance of 0.7 mm from the center of the upper surface of the seal ring with a depth of 3 μm and a width of 260 μm. The designed micro-texture can significantly increase the local contact pressure value without reducing the effective contact width, thereby improving the sealing performance of the high-pressure contact zone. It is found that the presence of micro-texture will significantly increase the peak contact pressure on both sides of the micro-texture, and it does not affect the contact pressure distribution in other contact areas. Compared with other cross-sections, the micro-texture of the profiled section has the best performance. As the depth of the micro-texture increases, the peak contact pressure increases, but the greater the change in contact pressure, the contact state will be unstable. With the increase in width, the peak contact pressure decreases, but the smaller the change in contact pressure, the contact state will be more stable. The contact state of multiple micro-textured seal rings is improved to a certain extent relative to a single micro-texture.