{"id":14280,"date":"2024-11-12T12:00:51","date_gmt":"2024-11-12T12:00:51","guid":{"rendered":"https:\/\/hydraflu.com\/?p=14280"},"modified":"2024-11-12T12:00:51","modified_gmt":"2024-11-12T12:00:51","slug":"bleed-air-from-closed-loop-hydraulic-systems","status":"publish","type":"post","link":"https:\/\/hydraflu.com\/pt\/sangrar-ar-de-sistemas-hidraulicos-de-circuito-fechado\/","title":{"rendered":"Por que e como sangrar o ar de sistemas hidr\u00e1ulicos de circuito fechado"},"content":{"rendered":"

<\/h1>\n

The trapped air in your hydraulic system is like an uninvited guest who just won’t leave on their own unless pushed away. Though it may look harmless, it can seriously mess with your system’s efficiency, cost you extra maintenance time, and ultimately cause major headaches. As you proceed to read, you will learn how to bleed air from it.<\/span><\/p>\n

Por que o ar aprisionado em um sistema hidr\u00e1ulico de circuito fechado \u00e9 um problema?<\/b><\/h2>\n

Os efeitos do ar aprisionado no funcionamento do sistema hidr\u00e1ulico<\/a> Com suavidade e precis\u00e3o, o sistema age como uma esponja para fluidos hidr\u00e1ulicos, criando movimentos bruscos ou irregulares e imprevis\u00edveis. Assim, mesmo que as vibra\u00e7\u00f5es n\u00e3o sejam t\u00e3o intensas, o sistema ainda se tornar\u00e1 inst\u00e1vel. Essa instabilidade resultar\u00e1 em perda de precis\u00e3o e grande desperd\u00edcio de energia, diminuindo a efici\u00eancia.<\/span><\/p>\n

Forma\u00e7\u00e3o de cavidades devido a bolhas aprisionadas<\/b><\/h3>\n

Outro problema \u00e9 a forma\u00e7\u00e3o de cavita\u00e7\u00e3o. Quando bolhas de ar se formam e implodem sob press\u00e3o devido \u00e0 opera\u00e7\u00e3o, elas criam cavidades. Embora isso possa n\u00e3o parecer t\u00e3o grave (e de fato \u00e9), tamb\u00e9m pode danificar suas bombas e v\u00e1lvulas, corroendo os componentes projetados para manter seu sistema hidr\u00e1ulico funcionando sem problemas.<\/span><\/p>\n

Danos a longo prazo no sistema hidr\u00e1ulico<\/b><\/h3>\n

Se voc\u00ea ignorar o ar preso por muito tempo, como geralmente acontece, isso levar\u00e1 ao desgaste interno do sistema. Esse desgaste s\u00f3 \u00e9 percebido no final, pois o ar preso geralmente passa despercebido ou \u00e9 causado por neglig\u00eancia ou pregui\u00e7a.<\/span><\/p>\n

The hydraulic fluid exists to ensure a smooth distribution of temperature. But, when the bubbles are formed and implode, it doesn\u2019t let the system stay in thermal balance. Only if you’re unlucky, the wear and tear might lead to cracked valve seats or worn pump components.<\/span><\/p>\n

Sinais e sintomas de ar preso em tubula\u00e7\u00f5es hidr\u00e1ulicas<\/b><\/h2>\n

The question that arises here is why this trapped air goes unnoticed. Let’s find the signs and symptoms and then you will be guided to bleed the air out of the system.<\/span><\/p>\n

Como identificar ar no circuito hidr\u00e1ulico<\/b><\/h3>\n

De fato, o ar em um sistema hidr\u00e1ulico n\u00e3o costuma chamar a aten\u00e7\u00e3o de forma ostensiva. Mas ainda \u00e9 poss\u00edvel identificar sua presen\u00e7a se voc\u00ea souber o que procurar. Os sintomas cl\u00e1ssicos incluem uma sensa\u00e7\u00e3o esponjosa em qualquer controle hidr\u00e1ulico, velocidade irregular e, claro, ru\u00eddos.<\/span><\/p>\n

Voc\u00ea pode prestar aten\u00e7\u00e3o a batidas, chiados ou qualquer som que se assemelhe a esses tipos de ru\u00eddos.<\/span><\/p>\n

Problemas comuns de desempenho relacionados \u00e0 presen\u00e7a a\u00e9rea<\/b><\/h3>\n

Problemas de desempenho causados por ar preso variam de movimentos bruscos e irregulares \u00e0 completa incapacidade de gerar press\u00e3o. Outra forma de perceber a presen\u00e7a de ar preso \u00e9 observar o movimento dos atuadores. Se os atuadores estiverem se movendo aos trancos e barrancos, ou se estiverem funcionando muito lentamente ou travando, pode-se considerar a possibilidade de presen\u00e7a de ar no sistema hidr\u00e1ulico.<\/span><\/p>\n

Entendendo os Sistemas Hidr\u00e1ulicos de Circuito Fechado<\/b><\/h3>\n

Antes de proceder \u00e0 sangria do sistema, \u00e9 importante compreender o funcionamento de um sistema hidr\u00e1ulico de circuito fechado. Ao contr\u00e1rio dos sistemas de circuito aberto, os sistemas de circuito fechado recirculam o fluido hidr\u00e1ulico de volta para a bomba, em vez de envi\u00e1-lo para um reservat\u00f3rio.<\/span><\/p>\n

Isso torna o sistema altamente eficiente, mas tamb\u00e9m vulner\u00e1vel ao ar aprisionado, j\u00e1 que o fluxo do fluido \u00e9 um circuito fechado. As chances de o ar escapar naturalmente s\u00e3o menores, e \u00e9 por isso que uma purga de ar adequada \u00e9 essencial.<\/span><\/p>\n

Ferramentas necess\u00e1rias para sangrar o ar de um sistema hidr\u00e1ulico<\/b><\/h2>\n

Para sangrar o ar de um sistema hidr\u00e1ulico n\u00e3o \u00e9 necess\u00e1rio um conjunto complexo de ferramentas. <\/span>Voc\u00ea s\u00f3 precisar\u00e1 de algumas ferramentas, como:<\/span><\/p>\n

    \n
  1. \u00a0 \u00a0 \u00a0 <\/span>Chaves para soltar as v\u00e1lvulas de sangria.<\/span><\/li>\n
  2. \u00a0 \u00a0 \u00a0 <\/span>Um man\u00f4metro para monitorar a press\u00e3o do sistema durante o sangramento.<\/span><\/li>\n
  3. \u00a0 \u00a0 \u00a0 <\/span>Use v\u00e1lvulas de sangria para permitir a sa\u00edda de ar.<\/span><\/li>\n
  4. \u00a0 \u00a0 \u00a0 <\/span>Equipamento de prote\u00e7\u00e3o (protetor facial, \u00f3culos de seguran\u00e7a, macac\u00e3o de seguran\u00e7a) para se proteger do impacto de fluido hidr\u00e1ulico pressurizado.<\/span><\/li>\n<\/ol>\n

    Certifique-se de que todas as ferramentas sejam pr\u00f3prias para uso hidr\u00e1ulico, pois as press\u00f5es envolvidas podem ser significativas e podem ser danificadas por ferramentas antigas.<\/span><\/p>\n

    Guia passo a passo para sangrar o ar de um sistema hidr\u00e1ulico de circuito fechado.<\/b><\/h3>\n

    Preparando o sistema para a purga de ar \u2013 Desligando-o<\/b><\/h4>\n

    Se estiver em funcionamento, como na maioria dos casos, primeiro desligue o sistema e deixe-o arrefecer. Isso porque os fluidos hidr\u00e1ulicos atingem temperaturas muito elevadas. Depois, certifique-se de que a \u00e1rea est\u00e1 livre. Coloque os seus \u00f3culos de seguran\u00e7a e vamos continuar.<\/span><\/p>\n

    Passos para sangrar manualmente o ar do sistema<\/b><\/h4>\n
      \n
    1. \u00a0 \u00a0 \u00a0 <\/span>O primeiro e mais importante passo \u00e9 localizar o <\/span>V\u00e1lvula de Sangria<\/b>. Geralmente \u00e9 encontrado pr\u00f3ximo a pontos altos do sistema para que o ar possa ser evacuado naturalmente.<\/span><\/li>\n
    2. \u00a0 \u00a0 \u00a0 <\/span>Ent\u00e3o voc\u00ea pode abrir a v\u00e1lvula, mas lentamente. A press\u00e3o pode empurrar o fluido para fora junto com o ar. Certamente voc\u00ea n\u00e3o quer que o fluido hidr\u00e1ulico do reservat\u00f3rio escape junto com o ar.<\/span><\/li>\n
    3. \u00a0 \u00a0 \u00a0 <\/span>Monitorar o processo \u00e9 muito importante, independentemente de o ar estar saindo ou n\u00e3o. \u00c9 preciso ficar atento \u00e0 presen\u00e7a de espuma no fluido, pois isso indica a sa\u00edda de ar.<\/span><\/li>\n
    4. \u00a0 \u00a0 \u00a0 <\/span>Assim que voc\u00ea sentir que a maior parte do ar foi expelida, pode acionar os atuadores para empurrar as bolhas restantes em dire\u00e7\u00e3o ao ponto de purga.<\/span><\/li>\n
    5. \u00a0 \u00a0 \u00a0 <\/span>Assim que notar um fluxo constante de fluido, voc\u00ea pode fechar a v\u00e1lvula de sangria.<\/span><\/li>\n<\/ol>\n

      Verifica\u00e7\u00e3o da remo\u00e7\u00e3o bem-sucedida do ar<\/b><\/h4>\n

      Ap\u00f3s concluir os passos mencionados acima e certificar-se de que o ar preso foi removido, ligue o sistema em baixa velocidade. Se tudo se mover suavemente, voc\u00ea conseguiu. Caso haja algum movimento brusco, o processo precisa ser repetido.<\/span><\/p>\n

      Precau\u00e7\u00f5es de seguran\u00e7a ao sangrar o ar de sistemas hidr\u00e1ulicos<\/b><\/h3>\n

      Sangrar um sistema hidr\u00e1ulico n\u00e3o \u00e9 exatamente desarmar uma bomba, mas os riscos s\u00e3o reais. A alta press\u00e3o do fluido pode causar ferimentos se houver um vazamento repentino. Por isso, \u00e9 necess\u00e1rio usar luvas e prote\u00e7\u00e3o para os olhos. Al\u00e9m disso, certifique-se de que todas as v\u00e1lvulas estejam bem apertadas antes de pressurizar o sistema novamente.<\/span><\/p>\n

      Desafios comuns e dicas de resolu\u00e7\u00e3o de problemas<\/b><\/h3>\n
        \n
      1. \u00a0 \u00a0 \u00a0 <\/span>Um dos problemas mais comuns \u00e9 que, \u00e0s vezes, o ar simplesmente n\u00e3o quer sair. Nesse caso, tente inclinar levemente o atuador ou dar leves toques nas mangueiras para ajudar o ar a se mover em dire\u00e7\u00e3o aos pontos de sangria.<\/span><\/li>\n
      2. \u00a0 \u00a0 \u00a0 <\/span>Ap\u00f3s eliminar o ar do sistema, certifique-se de que todas as conex\u00f5es estejam hermeticamente fechadas. Uma conex\u00e3o frouxa \u00e9 como convidar o ar para entrar novamente. Portanto, aperte tudo corretamente para evitar que o problema se repita.<\/span><\/li>\n<\/ol>\n

        Manuten\u00e7\u00e3o preventiva para evitar a entrada de ar em sistemas hidr\u00e1ulicos<\/b><\/h3>\n

        \u00c9 verdade tamb\u00e9m para a manuten\u00e7\u00e3o que a preven\u00e7\u00e3o \u00e9 sempre melhor que a manuten\u00e7\u00e3o. Para cumprir essa afirma\u00e7\u00e3o, inspecione regularmente as mangueiras, conex\u00f5es e veda\u00e7\u00f5es do sistema. Se necess\u00e1rio, substitua os componentes desgastados imediatamente. Outra medida importante \u00e9 manter tudo bem apertado. Isso minimizar\u00e1 a possibilidade de entrada de ar no sistema.<\/span><\/p>\n

        Conclus\u00e3o: Melhores pr\u00e1ticas para a manuten\u00e7\u00e3o de um sistema hidr\u00e1ulico livre de ar<\/b><\/h3>\n

        Manter um sistema hidr\u00e1ulico de circuito fechado livre de ar exige vigil\u00e2ncia constante. Verifica\u00e7\u00f5es regulares e manuten\u00e7\u00e3o adequada evitar\u00e3o muitos problemas. Lembre-se sempre de que a sangria do ar \u00e9 essencial para o bom funcionamento do sistema. Portanto, n\u00e3o espere que as coisas piorem e aja rapidamente para fazer toda a diferen\u00e7a.<\/span><\/p>","protected":false},"excerpt":{"rendered":"

        The trapped air in your hydraulic system is like an uninvited guest who just won’t leave on their own unless pushed away. 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