Dynamic characteristics and transient sealing performance analysis of hyperelliptic curve groove dry gas seals

Dynamic characteristics and transient sealing performance analysis of hyperelliptic curve groove dry gas seals
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超椭圆曲线沟槽干气密封动态特性及瞬态密封性能分析

DOI:
10.1016/j.triboint.2017.07.017
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发表时间:
2017-12
影响因子:
6.2
通讯作者:
彭旭东
彭旭东
中科院分区:
工程技术1区
文献类型:
--
作者:
陈源;江锦波;彭旭东

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提出了一种新型的面槽型干气密封,称为超椭圆曲线槽。在高PV值下,得到了不同极角和超椭圆系数下气膜动力特性系数的等值线分布。研究了有无角激励时气膜厚度和压力的扰动行为。定义了跃迁峰和周期峰,给出了它们的等值线分布,揭示了气膜动力特性系数对动态跟踪性能的影响机理。在角激励作用下,密封面之间会形成一个固定角度的动态楔形间隙,对干气密封的瞬态特性有显著影响。
This paper puts forward dry gas seals with novel face grooves that are called as hyperelliptic curve grooves. At high PV value, gas film dynamic characteristic coefficients isoline distributions are obtained under the different polar angle and hyperelliptic coefficient. Disturbance behaviors of gas film thickness and pressure are studied whether there is angular excitation or not. Saltation peak and period peak are defined, and their isoline distributions are presented which reveal the influence mechanism of gas film dynamic characteristics coefficients on dynamic tracking property. A dynamic wedge-shaped gap with a fixed angle between seal faces will form under the influence of angular excitation, and it has a significant impact on transient behaviors of the dry gas seals.
用于减少汽轮机护罩尖端泄漏的螺旋槽气体面密封:性能和可行性分析
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