A new type of generalised ellipse dimple has been introduced to improve load‐carrying capacity (LCC) of gas face seal. Theoretical model was developed to study the influence of key geometrical parameters of generalised ellipse dimple texture on LCC and leakage rate of gas face seal. Then the optimised shape of dimples for maximum LCC under different working conditions were obtained using genetic algorithm method. It is observed that generalised ellipse dimple with proper unit number and long axis included angle can enhance LCC and make a better balance between LCC and sealing characteristics of gas face seal compared with conventional ellipse or circle dimple at high speed. Dimple‐textured gas face seal with multirow radial dimples outperforms that with single‐row radial dimple on sealing characteristics.

中文翻译：

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广义椭圆形凹痕面密封的参数研究与形状优化

引入了一种新型的广义椭圆形凹窝，以提高气密面的承载能力（LCC）。建立了理论模型，研究了广义椭圆形酒窝结构的关键几何参数对LCC和气密面泄漏率的影响。然后采用遗传算法获得了在不同工况下最大LCC的凹坑形状的优化。可以看出，与常规椭圆形或圆形凹窝相比，具有适当的单元数和长轴夹角的广义椭圆形凹窝可以增强LCC，并在LCC和气密面密封特性之间取得更好的平衡。具有多排径向凹痕的酒窝纹理气面密封在密封性能上优于单排径向凹痕。