Bomba de pistão axial hidráulica Rexroth alemã projetada para aplicações de alta pressão com durabilidade e desempenho excepcionais.
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A série A4VSO oferece uma ampla gama de métodos de controle variáveis. Os mais comumente usados incluem:
Outros controles disponíveis incluem FR (Controle de Fluxo), MA (Controle Manual), EM (Controle do Motor Elétrico),
HW/HM/HS/HD (Vários Controles Hidráulicos) e DS (Controle Secundário para detecção de velocidade).
O controle DR mantém uma pressão constante no sistema alterando o ângulo da placa oscilante. Quando a pressão do sistema
atinge o valor definido por mola na válvula DR, o mecanismo de controle age para reduzir o deslocamento da bomba,
fornecendo apenas o fluxo necessário para manter a pressão definida.
Essa funcionalidade às vezes é referida como "Corte de Pressão" em algumas literaturas de bombas. É importante observar
que uma válvula de segurança do sistema ainda é essencial porque a resposta do controle DR é relativamente lenta em comparação com
choques de pressão repentinos; a válvula de segurança lida com picos de pressão transitórios.
DRG e DP são formas de controle de pressão constante, mas são projetados para diferentes aplicações:
Quando várias bombas com controles DR padrão são ajustadas para a mesma pressão e operam em paralelo, pequenas diferenças inerentes
em suas características de resposta e configurações de pressão podem fazer com que elas não reduzam o deslocamento
(corte) exatamente ao mesmo tempo e taxa. Essa falta de sincronização pode levar a interações entre as
bombas, resultando em flutuações de pressão e potencialmente causando vibração severa na tubulação.