closed head什么意思(电机)? 斗胆猜一下:closed head不是指电气规定, 应该是指泵。 所以这句话是指:泵的出口没有封闭,可以启动电机。 依据如下:positive displacement pumps must not be operated against closed head because unlike centrifugal pumps they have no shut off head and will continue to produce flow and build pressure until eventually catastrophic failure of pump and/or piping and ancillaries will occur.容积泵禁止在出口封闭的情况下运行。因为不像离心泵,容积泵没有关死扬程,会连续产生流量和压力,直至泵和/或管道以及附件出现严重故障。查看更多