关键词: 自泵送机械密封, 正交试验, 数值模拟, 计算流体力学, 优化

Abstract:

A kind of self-pumping hydrodynamic mechanical seal, that the liquid inlet groove was arranged on the stationary ring and the dynamic pressure groove was distributed on the rotating ring, was put forward based on the principle of centrifugal pump. The experimental scheme of the self-pumping mechanical seals was designed by orthogonal test. The numerical simulation experiments were carried out based on Fluent, including discussing the significant effects of every parameter on the face opening force and the leakage rate. The numerical results showed that the groove number N_g, the ratio of groove length and dam length γ, the ratio of groove width and ridge width d, and the pressure p were the significant factors affecting the opening force F_O and the leakage rate Q within the experimental ranges. Besides, the rotate speed n also affected Q significantly. Specifically, F_O was increased with increasing g, d and p, while decreased with increasing N_g. The influence of g, d, p and N_g on Q was similar to that on F_O. But Q was also increased with increasing n. The preliminary optimization of sealing structure was brought forward by analyzing the results of orthogonal test.

Key words: self-pumping mechanical seal, orthogonal test, numerical simulation, CFD, optimization