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| Sealing performance of mechanical seals with variousend faces using dynamic mesh technique |
| CHEN Hui-Long, Li-Wen-Yu, Wu-Rong-Zhen, Lin-Qing-Long, Huang-Jian-Ping |
| (School of Energy and Power Engineering， Jiangsu University, Zhenjiang， Jiangsu 212013， China) |
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Abstract Dynamic mesh technique in Fluent is used to simulate the film flow between two rings of mechanical seal.By this method the unknown thickness of film flow can be obtained so that the flow field in the film more resembles to that in the real situation.Then,the pressure,wall shear stress and leakage rate were estimated and compared among the mechanical seals with usual flat,micropore and microporespiral groove end faces,respectively.The results turned out that both the micropore and spiral groove can produce dynamic pressure effect.The high pressure region appears in the tapered section of the micropore end face,for the spiral groove face,the high pressure region locates at the step behind the groove trailing edge instead.Compared with the usual mechanical seal,the micropore mechanical seal can generate sufficient dynamic pressure and be subject to less frictional wear,but a relative larger leakage rate.However,the microporespiral groove mechanical seal not only has less frictional wear but smaller leakage and an excellent lubrication characteristic.As a result,the microporespiral groove mechanical seal maybe provide a feasible way to get a high sealing and noncontacting performance with zero leakage.
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Received: 01 September 2011
Published: 30 January 2012
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