This application discloses an energy-saving
control system and an
excavator hydraulic control device, relating to the field of
hydraulic control technology. The energy-saving
control system includes an energy-saving motor, a differential regeneration valve, an energy-saving circuit, and / or a first
directional valve. The energy-saving motor is connected to the shaft end of the
hydraulic pump group of the
excavator hydraulic control system. The oil outlet of the energy-saving motor is connected to the return oil channel through an unloading oil circuit. The differential regeneration valve is connected between the rodless chamber oil circuit and the rod chamber oil circuit of the boom cylinder
assembly of the
excavator hydraulic
control system. The energy-saving circuit is connected to the rodless chamber oil circuit of the boom cylinder
assembly. The energy-saving circuit is equipped with a flow extraction valve group, a take-up and release valve group, and an accumulator. The take-up and release valve group is connected to the oil inlet of the energy-saving motor. The first
directional valve is connected between the oil outlet of the energy-saving motor and the output oil circuit of the
hydraulic pump group of the excavator hydraulic control
system. The above-mentioned energy-saving control
system solves the problems of low working efficiency, large
energy loss, and high temperature rise in the excavator hydraulic system.