Functionality Diagrams for Hybrid Mechanical Seals with Silicon Nitride Rings

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Ring-on-ring tribological experiments were performed with hybrid mechanical seals with silicon nitride (Si3N4) rings. The K×PV product, where K is the wear coefficient, P the sealing pressure, and V the linear speed, is proposed as a novel parameter to characterize the total working range of a mechanical seal system, with the advantage of directly indicating the thickness reduction for a certain time of service. The K×PV criterion is represented in a map form called “functionality diagram.” The rotary Si3N4 rings show the better behavior (K×PV=0.05 m/h) against WC–Co mating faces.

Document Type: Research Article


Affiliations: 1: Mechanical Engineering Department, ISEC, 3040-228 Coimbra, Portugal 2: Ceramics Engineering Department, CICECO, University of Aveiro, 3810-193 Aveiro, Portugal 3: Mechanical Engineering Department, CIICS, University of Minho, 4800-058 Guimarães, Portugal

Publication date: August 1, 2005

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