{"id":9404,"date":"2020-09-24T10:04:24","date_gmt":"2020-09-24T13:04:24","guid":{"rendered":"https:\/\/blog.wika.com\/pt\/\/?p=9404"},"modified":"2020-09-24T10:04:24","modified_gmt":"2020-09-24T13:04:24","slug":"mttf-e-mttfd-what","status":"publish","type":"post","link":"https:\/\/blog.wika.com\/pt\/know-how\/mttf-e-mttfd-what\/","title":{"rendered":"MTTF e MTTFD \u2013 Qual \u00e9 a diferen\u00e7a?"},"content":{"rendered":"

Qual \u00e9 o valor do MTTF?<\/h2>\n

O valor MTTF \u00e9 um termo usado na \u00e1rea de an\u00e1lise e avalia\u00e7\u00e3o de risco. O significado exato \u00e9 tempo m\u00e9dio de falha ou simplesmente a vida \u00fatil m\u00e9dia de um componente. O MTTF ganhou relev\u00e2ncia particular devido ao EN ISO 13849-1. De acordo com este padr\u00e3o, o n\u00edvel de desempenho pode ser calculado com base no MTTF. Isso significa que esse valor \u00e9 usado para a avalia\u00e7\u00e3o de risco de m\u00e1quinas e instala\u00e7\u00f5es. Portanto, o valor tamb\u00e9m \u00e9 importante para a marca\u00e7\u00e3o CE (Conformidade Europeia), pois a seguran\u00e7a da m\u00e1quina tamb\u00e9m deve ser avaliada como parte dos exames de conformidade.<\/p>\n

Qual \u00e9 o valor MTTFD<\/sub>?<\/h2>\n

O valor MTTFD<\/sub> \u00e9 importante neste contexto, pois o valor MTTFD<\/sub> \u00e9 o \u201ctempo m\u00e9dio para falha perigosa\u201d.<\/p>\n

Diferen\u00e7a entre MTTF e MTTFD<\/sub><\/h2>\n

A diferen\u00e7a entre MTTF e MTTFD<\/sub> \u00e9 que o valor MTTF fornece apenas uma indica\u00e7\u00e3o neutra da vida m\u00e9dia de desgaste de um componente. O valor MTTFD<\/sub>, por outro lado, indica o tempo de opera\u00e7\u00e3o at\u00e9 que ocorra uma falha perigosa. Isso significa que, nesse caso, apenas as falhas que afetam a fun\u00e7\u00e3o de seguran\u00e7a s\u00e3o consideradas e inclu\u00eddas no n\u00edvel de desempenho. Exemplo de falha n\u00e3o perigosa: a falha de um determinado sensor pode causar danos ao motor, mas n\u00e3o \u00e9 relevante para considera\u00e7\u00f5es de seguran\u00e7a na avalia\u00e7\u00e3o de risco e perigo.<\/p>\n

Por que os fabricantes de pe\u00e7as n\u00e3o fornecem um valor MTTFD<\/sub> ?<\/h2>\n

Os fabricantes de pe\u00e7as (por exemplo, WIKA) n\u00e3o podem fornecer o valor MTTFD<\/sub>, pois eles s\u00f3 sabem em m\u00e9dia quando seu componente falha, mas n\u00e3o quais componentes, se houver, s\u00e3o falhas perigosas. Isso depende inteiramente da respectiva fun\u00e7\u00e3o. Al\u00e9m disso, a disposi\u00e7\u00e3o de v\u00e1rios elementos tamb\u00e9m pode afetar o tempo total at\u00e9 uma falha perigosa (MTTFD<\/sub>). Isso significa que o MTTFD<\/sub> s\u00f3 pode ser determinado pela pessoa que projeta a m\u00e1quina ou a planta com o componente correspondente e planeja as fun\u00e7\u00f5es de seguran\u00e7a que eles projetaram. Geralmente, \u00e9 o desenvolvedor ou o designer. Eles est\u00e3o aptos para calcular o MTTFD<\/sub>.<\/p>\n

Nota<\/strong>
\nSe voc\u00ea tiver mais perguntas sobre MTTF ou MTTFD<\/sub>, seu contato<\/a> WIKA ter\u00e1 prazer em ajud\u00e1-lo.<\/p>\n","protected":false},"excerpt":{"rendered":"

Qual \u00e9 o valor do MTTF? O valor MTTF \u00e9 um termo usado na \u00e1rea de an\u00e1lise e avalia\u00e7\u00e3o de risco. O significado exato \u00e9 tempo m\u00e9dio de falha ou simplesmente a vida \u00fatil m\u00e9dia de um componente. O MTTF ganhou relev\u00e2ncia particular devido ao EN ISO 13849-1. De acordo com este padr\u00e3o, o n\u00edvel […]<\/p>\n","protected":false},"author":236,"featured_media":9405,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13],"tags":[],"class_list":["post-9404","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-know-how"],"acf":[],"yoast_head":"\nMTTF e MTTFD \u2013 Qual \u00e9 a diferen\u00e7a? - WIKA blog<\/title>\n<meta name=\"description\" content=\"O valor MTTF \u00e9 um termo da \u00e1rea de an\u00e1lise e avalia\u00e7\u00e3o de risco. 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