Functionality diagrams for hybrid mechanical seals with silicon nitride rings

• Autor(a) principal: Carrapichano, J. M.
• Data de Publicação: 2005
• Outros Autores: Oliveira, F. J., Silva, R. F., Gomes, J. R.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/1822/6131
• topic: Science & Technology

Ring-on-ring tribological experiments were performed with hybrid mechanical seals with silicon nitride (Si3N4) rings. The K x 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 KxPV criterion is represented in a map form called ‘‘functionality diagram.’’ The rotary Si3N4 rings show the better behavior (KxPV=0.05 µm/h) against WC–Co mating faces.