Page 100 - 《摩擦学学报》2021年第4期

第 41 卷 第 4 期 摩 擦 学 学 报 Vol 41 No 4
2021 年 7 月 Tribology Jul, 2021

DOI: 10.16078/j.tribology.2020119

交错式扇贝阻尼密封动力特性研究

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尹 露 , 张万福 , 张世东 , 顾承璟 , 李 春 1,2
(1. 上海理工大学 能源与动力工程学院，上海 200093;
2. 上海市动力工程多相流动与传热重点实验室，上海 200093;
3. 上海明华电力科技有限公司，上海 200090)
摘 要: 建立交错式扇贝阻尼密封三维数值分析模型，基于动网格及多频椭圆涡动模型研究密封动力特性沿轴向分
布规律，计算分析错开角度(α=0°、11.25°、22.5°、33.75°)与密封腔深度(h=2.8、3.3、3.8和4.3 mm)对密封动力特性的影
响. 结果表明：上游腔室(C1~C4)具有较大的正直接刚度和有效阻尼，对抑制转子涡动、提升系统稳定性的贡献相对
较大. 相对并列式(α=0°)结构，交错式扇贝阻尼密封流体周向速度较小、湍流耗散增加，系统稳定性提升，同时密封
泄漏量降低. 错开角度为33.75°时的有效阻尼约为0°时的111%~121%；错开角度为22.5°时的泄漏量相较于0°时约降
低了2.11%. 有效阻尼随密封腔深度减小而增大，密封腔深度为2.8 mm时的有效阻尼约为4.3 mm时的146%~211%；
密封泄漏量随密封腔深度增大而降低，密封腔深度为4.3 mm时的泄漏量相较于2.8 mm时降低了约3.73%.
关键词: 交错式扇贝阻尼密封; 动力特性; 有效阻尼; 泄漏特性; 稳定性
中图分类号: TK263 文献标志码: A 文章编号: 1004-0595(2021)04–0543–10

Dynamic Characteristics of Interlaced Scallop Damper Seals

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YIN Lu , ZHANG Wanfu , ZHANG Shidong , GU Chengjing , LI Chun 1,2
(1. School of Energy and Power Engineering, University of Shanghai for Science and Technology,
Shanghai 200093, China
2. Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering, Shanghai 200093, China
3. Shanghai Minghua Electric Power Science &Technology Co Ltd, Shanghai 200090, China)
Abstract: The three-dimensional numerical analysis model of an interlaced scallop damper seal was established. The
dynamic characteristics in the axial direction was studied. Effects of the interlaced angle (α=0°, 11.25°, 22.5°, 33.75°)
and seal cavity depth (h=2.8 mm, 3.3 mm, 3.8 mm, 4.3 mm) on the dynamic characteristics of the scallop damper seal
were analyzed based on dynamic mesh method and multi-frequencies elliptic whirling model. Results showed that the
upstream seal cavity (C1~C4) had a large positive direct stiffness and effective damping, which showed a relatively
greater contribution to suppress the rotor whirling and improved the system stability. Compared with the parallel
structure (α=0°), the interlaced scallop damper seal had lower circumferential velocity, higher turbulence dissipation,
better system stability, and lower seal leakage flow rate. When the interlaced angle was 33.75°, the effective damping
was about 111% to 121% of that at 0°. The leakage flow rate for an interlaced angle of 22.5° was about 2.11% lower
than that at 0°. The effective damping increased with decreasing seal cavity depth. The effective damping of the seal
with cavity depth of 2.8 mm was 146% to 211% that of 4.3 mm. The leakage flow rate of the scallop damper seal
decreased with increasing seal cavity depth. The leakage flow rate for the seal cavity depth of 4.3 mm was reduced by
about 3.73% compared with that of 2.8 mm.
Key words: interlaced scallop damper seal; dynamic characteristics; effective damping; leakage characteristics; stability

Received 3 March 2020, revised 3 April 2020, accepted 9 April 2020, available online 28 July 2021.
*Corresponding author. E-mail: wfzhang@usst.edu.cn, Tel: +86-18817882508.
The project was supported by the National Natural Science Foundation of China (51875361), Natural Science Foundation of
Shanghai (20ZR1439200).
国家自然科学基金项目(51875361)，上海市自然科学基金项目(20ZR1439200)资助.