The present utility model relates to an energy-saving hydraulic system for a hollow blow molding machine, comprising a variable displacement piston pump, a solenoid directional valve, a first check valve, a second check valve, a third check valve, a pressure reducing valve, a main system accumulator, a pressure relay, a proportional pressure reducing valve, a servo system accumulator, a servo valve and a wall thickness control servo cylinder. The variable displacement piston pump is connected with the solenoid directional valve, one working oil port of the solenoid directional valve is connected with the oil inlet of the second check valve, the other working oil port is respectively connected with the first check valve and the pressure reducing valve, the first check valve is respectively connected with the main system accumulator and the proportional pressure reducing valve, the pressure reducing valve is connected with the third check valve, the third check valve is respectively connected with the servo system accumulator and the servo valve, and the working oil port of the servo valve is connected with the wall thickness control servo cylinder. The present utility model can completely eliminate overflow loss, and has fast running speed and strong adaptability.
Country Code: CN
Application Number: CN200920044989.0
