Excavator intelligent control hydraulic system and control method thereof

Abstract

The invention discloses an excavator intelligent control hydraulic system which comprises an electric proportioning pump (1), an electric-control pilot element (2), an oil source valve (3), a controller (4) and an electrically proportional control multiway valve (5). The electric-control pilot element (2), the electrically proportional control multiway valve (5) and the electric proportioning pump (1) are all connected with the controller (4), the electric proportioning pump (1) is connected with the electrically proportional control multiway valve (5) through one oil guide pipe, and is also connected with the oil source valve (3) through one oil guide pipe, and the oil source valve (3) is connected with a pilot proportional release value of the electrically proportional control multiway valve (5) through one oil guide pipe. The invention further discloses a control method of the system. The excavator intelligent control hydraulic system has the advantages that flexible and quick response, accurate control of pressure and flow and cooperative and smooth action can be realized, an excavator with the system can complete various precise actions, and the system has good energy saving effect, and can realize remote control and automatic and even unattended operation to the excavator.

Description

technical field [0001] The invention relates to an intelligent control hydraulic system of an excavator and a control method thereof. Background technique [0002] At present, the control systems used by excavators mainly include load sensing control, negative flow control, and positive flow control. [0003] Negative flow control: In addition to supplying the output flow of the main pump to each user, the excess flow passes through a fixed damping hole, and the pressure difference generated at both ends of the damping hole is fed back to the pump controller, and the pump controller adjusts according to the pressure difference. pump displacement. During compound action, each actuator interacts with each other; when the load changes, the action of the actuator is also affected. The driver needs to adjust again. The impact of the action is large, which often gives the driver an illusion that the whole machine is powerful and the work efficiency is high. The requirements fo...

AI Technical Summary

Problems solved by technology

Also, the variable displacement pump responds only after the joystick generates the pilot pressure command, the spool movement and the load signal are sent to the pump control loop, with a lag in response

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