Crane hydraulic system for load sensitive ship

Abstract

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.

Description

technical field [0001] The invention relates to a hydraulic system of a crane, in particular to a hydraulic system of a load-sensitive marine crane, which is particularly suitable for a semi-closed-loop control hydraulic system of a marine electrohydraulic crane. Background technique [0002] The hydraulic system of the marine electro-hydraulic crane is very complicated, and its performance directly affects the working efficiency of the crane, so it has high performance requirements for the hydraulic system of the crane. Under the circumstances, energy saving has also become an important criterion to measure the high performance of the hydraulic system of the crane. The hydraulic systems of today's marine electro-hydraulic cranes are mainly divided into medium-high pressure, low-speed, high-torque semi-closed systems, high-pressure, high-speed semi-closed systems, and fully closed systems. [0003] At present, the more advanced hydraulic systems of marine cranes in foreign ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the defects and problems existing in the prior art that cannot be controlled in real time, the control accuracy is low, the automation is weak, and the energy saving effect is poor, and to provide a real-time control with high control accuracy. , a load-sensitive marine crane hydraulic system with strong automation and good energy-saving effect

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