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Abstract
Contacting mechanical seals are load unbalanced. The unbalanced load (the difference between closing and opening forces) causes the seal faces to be in mechanical contact suppressing fluid pressure generation in the sealing dam. The two major concerns with contacting mechanical face seals are the wear rate of the faces and whether these faces will separate while in operation. These two modes of failure are directly related to the amount of initial compression (i.e., preset) in the bellows and the hydraulic loading. A new criterion for separation is presented based on a pragmatic model of the mechanics of contact. The separation speed derived herein is less conservative than that found more than two decades ago. The optimal speed which minimizes wear is determined to occur at the resonance frequencies of the system, thus providing guidelines for improved designs.
Presented at the 44th Annual Meeting in Atlanta, Georgia May 1–4, 1989
Notes
Presented at the 44th Annual Meeting in Atlanta, Georgia May 1–4, 1989