Experimental and theoretical studies of the dynamic behavior of a spiral-groove dry gas seal at high-speeds

Experimental and theoretical studies of the dynamic behavior of a spiral-groove dry gas seal at high-speeds
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螺旋槽干气密封高速动态行为的实验与理论研究

DOI:
10.1016/j.triboint.2018.04.005
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发表时间:
2018-09
影响因子:
6.2
通讯作者:
Li Jiyun
Li Jiyun
中科院分区:
工程技术1区
文献类型:
--
作者:
Chen Yuan;Peng Xudong;Jiang Jinbo;Meng Xiangkai;Li Jiyun

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干气密封由于转子系统的轴向振动较大,会产生较大的油膜厚度扰动,可能造成密封端面的碰摩或泄漏量过大。针对这一问题,在不同弹簧压力和不同螺旋槽深度条件下,对高速螺旋槽干气密封的瞬态油膜厚度和泄漏量进行了实验研究。并利用微扰法和气体润滑理论对油膜厚度扰动和平均泄漏率的实验结果进行了预测。结果表明,膜厚扰动幅值变化趋势的理论计算结果与实验数据吻合较好,表明扰动法是动态分析中一种有效的预测方法。
Because of great axial vibration of the rotor system, dry gas seal has a big film thickness disturbance, which may cause contact rubbing of seal faces or excessive leakage. Focusing on this problem, experimental studies on transient-state film thickness and leakage rate of a spiral groove dry gas seal at high-speeds are carried out under different spring pressures and different spiral groove depths. And the experimental results of film thickness disturbance and average leakage rate are predicted by perturbation method and gas lubrication theory. Results show that the theoretical results of variation trends of film thickness disturbance amplitudes coincide well with the experimental data, and it also represents that the perturbation method is an effective forecasting method in dynamic analysis.
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