The invention relates to a crane hydraulic
system for a load sensitive ship, which comprises an electric proportional
handle, a PLC main command controller, a
control system and a power source, wherein the
control system comprises an integrated electric liquid proportional
reversing valve, an integrated two-way reducing valve, an integrated pressure stop valve, a load sensitive
pilot control valve, a
pressure sensor, a balance valve, a secondary overflow valve, a
motor variable control valve and a two-stage
electric control axial
plunger variable motor that are connected through an oil pipeline; the power source comprises a load sensitive valve, an integrated
electric control pressure stop valve, an axial
plunger variable pump and a one-way valve that are connected through an oil pipeline; the PLC main command controller is respectively connected with the integrated electric liquid proportional
reversing valve, the load sensitive
pilot control valve, the
pressure sensor, the
motor variable control valve and the integrated
electric control pressure stop valve through electric control signals; and the
control system is connected with the power source through an oil pipeline. The invention can not only realize real-
time control and higher accuracy, but also has stronger
automation and better energy-saving effect.