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过去所介绍的电——液伺服阀,几乎全是第一级为喷嘴挡板,第二级为滑阀的流量控制阀。这里我们要介绍的是,作为压力控制阀代表的美国新泽西州马罗塔科学控制装置公司的电——液伺服阀(以下简称马罗塔电——液伺服阀)。马罗塔电——液伺服阀的第一级,采用了专门加压的控制阀(承载阀)和专门减压的控制阀(卸载阀)这样的两个电磁阀。第二级采用的是平衡提动阀。因而抗工作油中污垢杂质
The electro-hydraulic servo valves introduced in the past are almost all flow control valves with the first stage being the nozzle baffle and the second stage being the slide valve. Here we are going to introduce the electro-hydraulic servo valve (hereinafter referred to as Marotator electro-hydraulic servo valve) of Marotta Scientific Control Company of New Jersey, USA as a pressure control valve. Marotta electro-hydraulic servo valve of the first level, the use of specialized pressurized control valve (bearing valve) and special decompression control valve (unloading valve) such two solenoid valve. The second stage is the balance poppet valve. Resistant to work in the dirt and impurities in the oil