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为得到在不同的工况参数下对螺旋槽机械密封的密封性能的影响规律,建立理想状态下的流体计算域模型,运用计算流体力学对螺旋槽机械密封动静环间的流场进行模拟分析,通过工况参数的改变来观察各密封性能参数—端面压力、开启力、泄漏量等的变化规律。结果表明:螺旋槽能够产生明显的动压效应,动压效应的大小与动环转速呈正比;泄露量的大小随动环转速或介质压力的提高而变大,随介质粘度的增大而减小;开启力的大小与动环端面的压力具有相同的变化规律。
In order to get the influence law of the sealing performance of the spiral groove mechanical seal under different operating parameters, a fluid calculation domain model in the ideal state is established, the flow field between the static and the static ring of the spiral groove mechanical seal is simulated by computational fluid dynamics, Through the change of working parameters, the sealing performance parameters such as end pressure, opening force and leakage were observed. The results show that the spiral groove can produce obvious dynamic pressure effect. The dynamic pressure effect is proportional to the rotational speed of the moving ring. The amount of leakage increases with the increase of the rotating ring speed or medium pressure, decreases with the increase of medium viscosity Small; the size of the opening force and the pressure on the end face of the moving ring has the same variation.