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为解决目前干式气体密封存在的开启力与气膜轴向刚度不足,易出现磨损与失稳等问题,本文尝试将仿生学理念引入干式气体密封技术中,通过分析典型飞鸟的羽翼轮廓差异对其飞行状态与能力的影响,定义轮廓外形几何特征参数,运用几何重构法在现有干式气体密封的典型型槽即螺旋槽的基础上构建仿生型槽,提出新型仿生型槽干式气体密封密封.基于气体润滑理论,在建立仿生型槽干式气体密封的几何模型和端面气膜压力控制方程的基础上,采用有限差分法对仿生型槽干式气体密封进行数值模拟研究,分析了仿生型槽的主要几何结构参数对密封性能的影响规律.结果表明:相较于典型螺旋槽干式气体密封,通过合理设置仿生型槽干式气体密封的端面型槽的几何结构参数值,其开启力、气膜刚度等密封性能参数在一定范围内有所提升;干式气体密封的仿生设计具有重要的实际意义.
In order to solve the problems of the opening force of dry gas seal and the lack of axial rigidity of the gas film and the easy occurrence of wear and instability, this paper attempts to introduce the concept of bionics into the dry gas sealing technology. By analyzing the difference of wing profile The geometrical parameters of the outline shape are defined based on the influence of its flight state and capability. The bionic slot is built on the basis of the existing spiral groove, Based on the gas lubrication theory, based on the establishment of the geometrical model of the dry-type gas seal and the control equation of the gas pressure on the end face, the finite difference method is used to simulate the dry gas seal of the bionic tank, The main geometric parameters of the bionic groove on the performance of the seal performance.The results show that: Compared with the typical spiral groove dry gas seal, through the rational setting of the geometry parameters of the bionic type grooved gas seal end face groove, Its opening force, film stiffness and other sealing performance parameters have improved within a certain range; dry gas sealed bionic design has a heavy Practical significance.