Innovation Series: Advanced Science (ISSN 2938-9933, CNKI Indexed)

Influence of Film Pressure Distribution on Leakage Stability of Mechanical Seal Faces

Jing Wang^1,*, Zhonghua Zhou²

¹ Chongqing Technology and Business Institute, Chongqing Open University, Chongqing 401520, China

² China Oilfield Services Limited, Sanhe 065200, Hebei, China

Corresponding Author: Jing Wang (1065560315@qq.com)

Funding: Scientific and Technological Research Project of Chongqing Municipal Education Commission (No. KJQN202204018): Research on Sealing Mechanism of Mechanical Equipment Lip Seal

Abstract: Mechanical seal is responsible for the control of media leakage in pumps, compressors and high-speed rotating equipment. The pressure distribution of the liquid film on the end face is directly related to the reliability of the equipment seal. Focusing on the influence of end-face membrane pressure distribution on leakage stability, this paper constructed CFD numerical simulation, finite element deformation calculation and sensor data calibration methods, solved the liquid film pressure field through the film lubrication equation, mapped the membrane pressure load to the finite element model, and analyzed the relationship between membrane pressure distribution and leakage fluctuation by combining pressure gradient extraction, low-pressure connected area identification and leakage fluctuation coefficient evaluation. Nine groups of rotation speed load experiments show that the average membrane pressure of the end face increases from 0.46 MPa to 1.18 MPa, the dispersion coefficient of membrane pressure increases from 0.083 to 0.214, the fluctuation coefficient of leakage increases from 0.061 to 0.186, and the correlation coefficient between them reaches 0.94. The research can provide technical basis for the optimization of mechanical seal end face structure and leakage risk control.

Keywords: Mechanical seal; End-mask pressure distribution; Leakage stability; CFD numerical simulation

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