{"id":2528,"date":"2026-03-08T09:06:00","date_gmt":"2026-03-08T01:06:00","guid":{"rendered":"https:\/\/www.takebrakes.com\/?p=2528"},"modified":"2026-02-24T17:09:47","modified_gmt":"2026-02-24T09:09:47","slug":"brake-torque-testing-and-verification","status":"publish","type":"post","link":"https:\/\/www.takebrakes.com\/pt\/brake-torque-testing-and-verification\/","title":{"rendered":"Teste e Verifica\u00e7\u00e3o do Torque do Trav\u00e3o: Como Provar que o seu trav\u00e3o mant\u00e9m a carga"},"content":{"rendered":"

You\u2019ve installed the brake, adjusted the clearance, and wired the controls. But does it actually hold the rated torque? In critical lifting (hoists, elevators) and holding (conveyors, wind turbines) applications, trust is not enough<\/strong>. You need proof.<\/p>\n\n\n\n

This article outlines the practical methods for verifying brake torque<\/strong> on site, from simple static load tests to dynamic functional checks. We cover procedures applicable to YWZ13 drum brakes<\/strong><\/a>, SH fail-safe disc brakes<\/strong><\/a>e SE electromagnetic brakes<\/strong><\/a>.<\/p>\n\n\n\n

Diagrama de uma configura\u00e7\u00e3o de teste de torque est\u00e1tico: C\u00e9lula de carga numa alavanca ligada ao eixo do trav\u00e3o.<\/p>\n\n\n\n

1) Por que o Torque Nominal \u2260 Torque Real<\/h2>\n\n\n\n

Uma placa de identifica\u00e7\u00e3o do trav\u00e3o pode indicar \u201c2000 N\u00b7m,\u201d mas o torque de reten\u00e7\u00e3o real depende de:<\/p>\n\n\n\n

    \n
  • Ajuste de Encerramento:<\/strong> As forra\u00e7\u00f5es novas contactam apenas 50\u201360% da superf\u00edcie. O torque \u00e9 menor at\u00e9 serem ajustadas.<\/li>\n\n\n\n
  • Ajuste da Mola:<\/strong> Se o comprimento da mola estiver mal ajustado (muito longo), a for\u00e7a de aperto \u00e9 baixa.<\/li>\n\n\n\n
  • Condi\u00e7\u00e3o de Fric\u00e7\u00e3o:<\/strong> \u00d3leo, graxa ou ferrugem no disco\/buzina reduzem o coeficiente de atrito ($\\mu$).<\/li>\n\n\n\n
  • Temperatura:<\/strong> Trav\u00f5es quentes perdem efic\u00e1cia. Trav\u00f5es frios podem agarrar.<\/li>\n<\/ul>\n\n\n\n

    2) M\u00e9todo A: Teste de Carga Est\u00e1tica (O Teste do \"Peso Morto\")<\/h2>\n\n\n\n

    This is the standard for cranes and hoists. It tests the brake’s ability to hold<\/strong> a stationary load.<\/p>\n\n\n\n

    Procedimento<\/h3>\n\n\n\n
      \n
    1. Aplique o trav\u00e3o:<\/strong> Assegure-se de que o trav\u00e3o est\u00e1 completamente fechado (molas comprimidas).<\/li>\n\n\n\n
    2. Aplicar Carga de Teste:<\/strong>\n
        \n
      • Guinchos:<\/strong> Levante 125% da carga nominal (SWL) ligeiramente acima do ch\u00e3o. Mantenha por 10 minutos.<\/li>\n\n\n\n
      • Guinchos\/Transportadores:<\/strong> Aplique torque atrav\u00e9s do motor (se poss\u00edvel) ou de uma alavanca com pesos.<\/li>\n<\/ul>\n<\/li>\n\n\n\n
      • Medir Escorregamento:<\/strong> Marque a roda\/disco do trav\u00e3o e um ponto fixo. Se a marca se mover, o trav\u00e3o falhou.<\/li>\n\n\n\n
      • Seguran\u00e7a:<\/strong> Mantenha a carga perto do ch\u00e3o. Tenha um trav\u00e3o de reserva ou bloqueio preparado.<\/li>\n<\/ol>\n\n\n\n

        3) M\u00e9todo B: Teste de Escorregamento Din\u00e2mico (O Teste \"Motor em Funcionamento\")<\/h2>\n\n\n\n

        This tests the brake’s maximum breakaway torque<\/strong>. It is safer than lifting weights because the load is generated by the motor against the brake.<\/p>\n\n\n\n

        Procedimento<\/h3>\n\n\n\n
          \n
        1. Bloqueie a Sa\u00edda:<\/strong> (Opcional) Se testar o trav\u00e3o do motor, bloqueie mecanicamente o eixo de sa\u00edda da caixa de velocidades (se seguro).<\/li>\n\n\n\n
        2. Aplique o trav\u00e3o:<\/strong> Mantenha o trav\u00e3o fechado.<\/li>\n\n\n\n
        3. Aumentar o Torque do Motor:<\/strong> Use o VFD para aumentar lentamente o torque do motor contra o trav\u00e3o fechado.<\/li>\n\n\n\n
        4. Monitorize Corrente\/Torque:<\/strong> Observe o feedback de torque do VFD.<\/li>\n\n\n\n
        5. Detectar Escorregamento:<\/strong> Anote o valor de torque onde o eixo do trav\u00e3o come\u00e7a a girar (escorregamento).<\/li>\n\n\n\n
        6. Resultado:<\/strong> Se ocorrer escorregamento a < 150\u2013200% do torque do motor nominal (dependendo do dimensionamento do trav\u00e3o), o trav\u00e3o \u00e9 fraco.<\/li>\n<\/ol>\n\n\n\n

          Warning:<\/strong> Do not run this test for more than a few seconds. Slipping a closed brake generates massive heat rapidly. Cool down between attempts.<\/p>\n\n\n\n

          4) M\u00e9todo C: Teste de Dist\u00e2ncia de Paragem (Verifica\u00e7\u00e3o Funcional)<\/h2>\n\n\n\n

          For travel drives and conveyors, holding torque matters less than stopping energy<\/strong>.<\/p>\n\n\n\n

          Procedimento<\/h3>\n\n\n\n
            \n
          1. Operar a Velocidade M\u00e1xima:<\/strong> Operar a m\u00e1quina a velocidade normal com carga normal.<\/li>\n\n\n\n
          2. Paragem de Emerg\u00eancia:<\/strong> Ative uma paragem de emerg\u00eancia (corte de energia imediatamente ao trav\u00e3o).<\/li>\n\n\n\n
          3. Medir Dist\u00e2ncia\/Tempo:<\/strong> Registe o tempo ou a dist\u00e2ncia at\u00e9 parar completamente.<\/li>\n\n\n\n
          4. Compare:<\/strong> Est\u00e1 dentro do limite de seguran\u00e7a? (por exemplo, < 3 metros). Se a dist\u00e2ncia de paragem aumentar com o tempo, o torque do trav\u00e3o est\u00e1 a diminuir ou as forra\u00e7\u00f5es est\u00e3o gastas.<\/li>\n<\/ol>\n\n\n\n

            5) Resolu\u00e7\u00e3o de Problemas de Torque Baixo<\/h2>\n\n\n\n
            Causa relacionada ao \u00f3leo (comum)<\/th>Causa Prov\u00e1vel<\/th>Fixar<\/th><\/tr><\/thead>
            Escorregamento a < 80% da Classifica\u00e7\u00e3o<\/strong><\/td>\u00d3leo\/Graxa na superf\u00edcie de fric\u00e7\u00e3o.<\/td>Limpe o disco\/buzina com solvente. Substitua as forra\u00e7\u00f5es contaminadas (que absorvem \u00f3leo).<\/td><\/tr>
            Escorregamento a 80\u201390% da Classifica\u00e7\u00e3o<\/strong><\/td>Forra\u00e7\u00f5es novas ainda n\u00e3o ajustadas.<\/td>Realize ciclos de polimento (paragens leves de arrasto) para melhorar a \u00e1rea de contacto.<\/td><\/tr>
            O torque diminui quando quente<\/strong><\/td>Material de forra\u00e7\u00e3o incorreto (grau de baixa temperatura) ou arrasto.<\/td>Verifique se h\u00e1 arrasto (curso do atuador). Fa\u00e7a upgrade para forra\u00e7\u00e3o de maior temperatura.<\/td><\/tr>
            Torque Flutua<\/strong><\/td>Superf\u00edcie vidrada ou press\u00e3o de mola irregular.<\/td>Lixar a superf\u00edcie de fric\u00e7\u00e3o para remover o vidrado. Verifique os ajustes da mola.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

            6) Documenta\u00e7\u00e3o: Certificado de Torque<\/h2>\n\n\n\n

            For critical projects, we provide a factory torque test certificate<\/strong>. This documents that the specific serial number brake held its rated torque on our test bench before shipping. However, on-site verification is still recommended to account for installation variables.<\/p>\n\n\n\n

            Precisa de um procedimento de teste de torque ou certificado?<\/h2>\n\n\n\n

            If you need a formal brake torque test procedure<\/strong> for your maintenance team or a replacement brake with a certified torque rating, contact us. We can support your commissioning process.<\/p>","protected":false},"excerpt":{"rendered":"

            You\u2019ve installed the brake, adjusted the clearance, and wired the controls. But does it actually hold the rated torque? In critical lifting (hoists, elevators) and holding (conveyors, wind turbines) applications, trust is not enough. You need proof. This article outlines the practical methods for verifying brake torque on site, from simple static load tests to […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5,3],"tags":[],"class_list":["post-2528","post","type-post","status-publish","format-standard","hentry","category-info","category-blog"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/posts\/2528","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/comments?post=2528"}],"version-history":[{"count":1,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/posts\/2528\/revisions"}],"predecessor-version":[{"id":2529,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/posts\/2528\/revisions\/2529"}],"wp:attachment":[{"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/media?parent=2528"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/categories?post=2528"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.takebrakes.com\/pt\/wp-json\/wp\/v2\/tags?post=2528"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}