Evaluation on liquid film cavitation capacity in reverse Rayleigh step and cavitation suction effect in its mechanical seals

MA Xuezhong; MENG Xiangkai; ZHANG Weizheng; PENG Xudong; DING Xuexing

doi:10.11949/0438-1157.20200665

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Evaluation on liquid film cavitation capacity in reverse Rayleigh step and cavitation suction effect in its mechanical seals

Surface and interface engineering | 更新时间：2026-07-24

- Evaluation on liquid film cavitation capacity in reverse Rayleigh step and cavitation suction effect in its mechanical seals
- CIESC Journal Vol. 71, Issue 12, Pages: 5715-5724(2020)
- 作者机构：
  
  1.兰州理工大学石油化工学院，甘肃兰州 730050
  2.浙江工业大学机械工程学院，浙江杭州 310032
- 作者简介：
- 基金信息：
- DOI：10.11949/0438-1157.20200665
  CLC： TH 117.2
- Received：28 May 2020，
  
  Revised：2020-07-08，
  
  Online First：17 December 2020，
  
  Published：05 December 2020
- 稿件说明：
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马学忠, 孟祥铠, 张伟政, 彭旭东, 丁雪兴. 反向瑞利台阶构型液膜空化性能与机械密封空化抽吸效应评价[J]. 化工学报, 2020, 71(12): 5715-5724

MA Xuezhong, MENG Xiangkai, ZHANG Weizheng, PENG Xudong, DING Xuexing. Evaluation on liquid film cavitation capacity in reverse Rayleigh step and cavitation suction effect in its mechanical seals[J]. CIESC Journal, 2020, 71(12): 5715-5724
马学忠, 孟祥铠, 张伟政, 彭旭东, 丁雪兴. 反向瑞利台阶构型液膜空化性能与机械密封空化抽吸效应评价[J]. 化工学报, 2020, 71(12): 5715-5724 DOI： 10.11949/0438-1157.20200665.

MA Xuezhong, MENG Xiangkai, ZHANG Weizheng, PENG Xudong, DING Xuexing. Evaluation on liquid film cavitation capacity in reverse Rayleigh step and cavitation suction effect in its mechanical seals[J]. CIESC Journal, 2020, 71(12): 5715-5724 DOI： 10.11949/0438-1157.20200665.

摘要

针对瑞利台阶构型，采用有限单元法基于JFO空化边界条件求解Reynolds方程，建立了流体动压润滑数值模型。对比了正向和反向瑞利台阶构型的液膜压力与密度比分布，评价了反向瑞利台阶构型在不同操作工况与结构参数下的液膜空化性能。阐释了反向瑞利台阶机械密封液膜空化抽吸机理并对比分析了其密封性能，评价了液膜空化抽吸效应水平。结果表明，结合操作工况在合理的结构设计下，反向瑞利台阶主槽区域可产生充分的液膜空化效应，从而使其机械密封具有良好的空化抽吸效应，可实现密封介质的零泄漏或反向抽吸。

Abstract

Aiming at the Rayleigh step configuration

the finite element method is used to solve the Reynolds equation based on the JFO cavitation boundary conditions to establish a hydrodynamic lubrication numerical model. Film pressure and density ratio distributions of the Rayleigh step (RS) and reverse Rayleigh step (RRS) are compared. Liquid film cavitation capacity in RRS is evaluated under the different geometrical structures and operating conditions. Cavitation suction mechanism in the mechanical seal with RRS is developed and its sealing performance is comparably analyzed to evaluate the cavitation suction effect. The results show that cavitation occurs fully in the main groove zone of RRS under proper structure design with considering operation conditions

and its mechanical seal has good cavitation suction effect to achieve zero leakage or reverse suction of sealed medium.

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