仿特斯拉阀结构新型槽端面干气密封的数值研究

基于特斯拉阀结构的单向导通特性，提出一种集聚点更多和高压区域面积更大的新型(特斯拉阀型)干气密封槽型结构，该结构可获得比经典对数螺旋槽型更佳的密封效果. 通过建立特斯拉阀密封槽型的几何模型和数学模型，采用Fluent软件对不同几何参数和工况参数的密封性能进行系统数值仿真，获得密封开启力、气膜刚度和泄漏量等稳态性性能参数及瞬态膜压波动幅值方差. 分析了主阀道、支阀道和阀槽半径等参数对密封性能的影响规律，对比研究对数螺旋槽与特斯拉阀槽型在不同工况条件下的性能特性. 结果表明：相较于经典对数螺旋槽，同一工况下的特斯拉阀槽型具有更佳的开启力和刚度特性，尤其在高速、高压、小膜厚和大槽深时的开启力提升效果更加显著；在干气密封气膜稳定运行区间(h=3~6 μm)，特斯拉阀槽型的气膜刚度较螺旋槽提升近20%；在高转速时(N>30000 r/min)，特斯拉阀槽型的稳定性更好，且具有更小的压力波动.

Based on the unidirectional conduction characteristics of Tesla valve structure, a novel (Tesla valve-type) dry gas seal groove structure with more convergence points and larger high-pressure region area is proposed, which can achieve better sealing performance than the classical logarithmic spiral groove type. By establishing the geometric and mathematical models of the Tesla valve seal groove, Fluent software was used to conduct systematic numerical simulations on the sealing performance under different geometric and operating condition parameters, obtaining steady-state performance parameters such as sealing opening force, gas film stiffness and leakage rate, as well as the variance of transient film pressure fluctuation amplitude. The influence laws of parameters such as main valve passage, branch valve passage and groove radius on sealing performance were analyzed, and the performance characteristics of logarithmic spiral groove and Tesla valve groove under different operating conditions were comparatively studied. The results show that: compared with the classical logarithmic spiral groove, the Tesla valve groove has better opening force and stiffness characteristics under the same operating conditions, especially the opening force improvement effect is more significant at high speed, high pressure, small film thickness and large groove depth; in the stable operating range of dry gas seal gas film (h=3~6 μm), the gas film stiffness of Tesla valve groove is increased by nearly 20% compared with the spiral groove; at high rotational speeds (N>30000 r/min), the Tesla valve groove has better stability and smaller pressure fluctuation.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于摩擦学领域，研究基于特斯拉阀结构的新型干气密封槽型设计，通过数值仿真方法分析其密封性能。结果表明，相较于经典对数螺旋槽型，特斯拉阀槽型在开启力、气膜刚度和稳定性方面表现更优，尤其在高速、高压工况下提升效果显著。数据集包含仿真计算相关文件，用于支持干气密封技术的优化研究。