周向波度不等机械密封的密封性能

Sealing Properties of Mechanical Seals in Different Circumferential Waviness

为研究波峰和波谷幅值不等的周向波度机械密封的工作机制,运用Fluent软件对人为加工或变形导致的幅值不等的密封端面的周向波度机械密封的流场进行数值模拟,分析运动参数对不同周向波度密封端面机械密封性能的影响。结果表明:当波谷幅值不变时,随着波峰幅值的增加,开启力和泄漏量均增加;当波峰幅值不变时,随着波谷幅值的增加,开启力和泄漏量均减小。一个周期内密封端面波峰幅值小于波谷幅值的机械密封具有更小的开启力和泄漏量,受转速和入口压力变化的影响较小,从而保证了密封的稳定性。

In order to research the working mechanism of circumferential waviness mechanical seals in different peaks and troughs, the flow field of the circumferential waviness mechanical seals with different amplitudes of end faces by artifi- cial processing or caused by deformation was simulated by using software Fluent. The effects of operating parameters on the sealing performances of the mechanical seals with different circumferential waviness of end faces were analyzed. Resuhs show that when the trough amplitude is constant, the opening force and leakage of the circumferential waviness mechanical seals are increased along with the increase of the peak amplitude; when the peak amplitude is constant, the opening force and leakage are reduced along with the increase of trough amplitude. Within the same cycle, the mechanical seals with lar- ger trough amplitude of end faces than peak amplitude have smaller opening force and leakage, which are less affected by rotational speed and inlet pressure changes, so the stability of the mechanical seals can be ensured.