Page 158 - 《摩擦学学报》2021年第5期

第 5 期 杨兴辰, 等: 迷宫-蜂窝混合型密封静态稳定性与泄漏特性研究 747

75 30
ε=10%, h max
60 ε=10%, h min 25 ε=10%, h max
ε=50%, h max
Circumferential velocity gradient/10 2 s −1 −15 0 ε=90%, h min Circumferential velocity gradient/10 2 s −1 15 0 ε=90%, h max
ε=10%, h min
20
45
ε=50%, h max
ε=50%, h min
ε=90%, h max
ε=50%, h min
30
15
10
ε=90%, h min
50
−30
−10
−45 −50
−60 −15
0.8 4.5 8.3 12.1 15.9 19.8 23.6 27.4 31.2 35.0 0.8 4.5 8.3 12.1 15.9 19.8 23.6 27.4 31.2 35.0
Axial distance/mm Axial distance/mm
(a) Hybrid labyrinth-honeycomb seal (b) Traditional labyrinth seal

Fig. 19 Circumferential velocity gradient in the maximum and minimum clearance along the axial leakage path for eccentric
conditions (choked flow condition)
图 19 阻塞状态不同偏心工况下两种密封大、小间隙处周向速度梯度沿轴向分布
下降低泄漏量4.37%；阻塞状态下，迷宫-蜂窝混合型 Aerospace Science and Technology, 2020, 105: 105997. doi: 10.1016/
密封在低偏心时可以有效降低泄漏量，最高降低泄漏 j.ast.2020.105997.
[ 5 ] Li Zhigang, Li Jun, Feng Zhenping. Leakage flow of pocket damper
量5.45%.
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负的静态刚度系数及密封气流力，且随偏心率的增大
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下静态直接刚度系数均为负值，非阻塞状态下其绝对 [ 6 ] Wei Yuan, Liu Shulin. Numerical analysis of the dynamic behavior
值相对传统迷宫密封较低且随偏心率增大下降趋势 of a rotor-bearing-brush seal system with bristle interference[J].
较缓，阻塞状态下静态直接刚度系数绝对值随偏心率 Journal of Mechanical Science and Technology, 2019, 33(8):
3895–3903. doi: 10.1007/s12206-019-0733-z.
增大而减小，较传统迷宫密封更为稳定.
[ 7 ] Liu Luyuan, Zhang Yuanqiao, Li Jun, et al. Effect of brush seal on
c. 传统迷宫密封因惯性及黏性效应的影响，大、
the aerodynamic performance of turbine stages[J]. Journal of
小间隙压差增大，加剧转子偏心. 迷宫-蜂窝混合型密
Engineering Thermophysics, 2020, 41(1): 122–127 (in Chinese) [刘
封在蜂窝孔影响下，黏性效应受偏心影响较小，大、小 璐园, 张元桥, 李军, 等. 刷式密封对透平级气动性能影响的研究
间隙周向速度差较小，周向流动较为平缓，大、小间隙 [J]. 工程热物理学报, 2020, 41(1): 122–127].
压差较小，系统稳定性相对较高. [ 8 ] Zhang Xuan, Peng Xudong, Jiang Jinbo, et al. The influence of
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