Energy -efficient hydraulic press of large -tonnage

• Main Authors: FAN HAOLAN, GONG RUNQING, WEN PENGGAO, LIU MOLANG
• Format: Patent
• Language: Chinese; English
• Published: 28.07.2017
• Subjects: PERFORMING OPERATIONS; PRESSES; PRESSES IN GENERAL; TRANSPORTING

The utility model discloses an energy -efficient hydraulic press of large -tonnage comprises chassis, portal frame, pneumatic cylinder and the hydraulic system that is used for behaviour to move pneumatic cylinder motion, and hydraulic system includes high -pressure oil pump, low pressure oil pump, inverter motor, wherein: high -pressure oil pump is through high -pressure relief circuit and confession oil line connection, low pressure oil pump outlet divides the three routes, and all the way through first bi -pass inserted valve and confession oil line connection, another sweetgum fruit is crossed the low pressure relief circuit and is led to the oil line connection that returns of oil tank, and check valve, low pressure energy storage ware, release control return circuit and confession oil line connection are crossed to last sweetgum fruit. The utility model discloses it is rational in infrastructure, the dependable performance, oil pump outlet passes through the three routes return circuit and is connected