数字变量泵具有抗介质污染强、滞环误差小、重复精度高、可直接与微机连接、结构简单、调节灵活以及成本低等诸多优点,因而它的使用越来越广泛。我们利用25CCY14-1B型手动伺服变量柱塞泵研制成电液数字变量泵,并将其应用于850t液压熨平机,实现熨平机工作台速度的开环控制和系统工作压力的闭环控制,使熨平机液压系统大大简化,系统工作压力的控制精度以及可靠性大 Digital variable pump with anti-media pollution, hysteresis error is small, high repetition accuracy, can be directly connected with the computer, simple structure, flexible adjustment and low cost, and many other advantages, so its use is more and more widely. We use 25CCY14-1B type manual servo variable piston pump developed into electro-hydraulic digital variable pump, and its application to 850t hydraulic ironing machine, ironing machine table speed to achieve open-loop control and system working pressure closed-loop control, So ironing machine hydraulic system greatly simplified, the system pressure control accuracy and reliability