Hydraulic energy regeneration automatic control device for container front crane and control method

Abstract

The invention provides a hydraulic energy regeneration automatic control device for a container front crane and a control method. The hydraulic energy regeneration automatic control device comprises aselection switch connected with a vehicle controller, a lifting appliance, a lifting oil cylinder for controlling a big arm to rise and fall, and an energy regeneration electromagnetic valve arrangedon a hydraulic oil loop of a rod cavity of the lifting oil cylinder, wherein an upper pressure sensor and a lower pressure sensor are respectively arranged in the rod cavity and a rodless cavity of the lifting oil cylinder; a length and angle sensor for detecting the length of the big arm and an included angle between the big arm and a horizontal line; the output ends of the length and angle sensor, the upper pressure sensor, the lower pressure sensor and the selection switch are connected with the input end of the vehicle controller; the output end of the vehicle controller is connected withthe energy regeneration electromagnetic valve to control opening and closing of the energy regeneration electromagnetic valve. The hydraulic energy regeneration automatic control device avoids the phenomenon of oscillation of the big arm due to closing of the energy regeneration electromagnetic valve, and also improves the working efficiency of a vehicle; meanwhile, the operation comfortablenessof a driver is improved.

Description

Technical field [0001] The invention relates to an energy-saving technology for a front crane hydraulic system, in particular to a front crane hydraulic energy regeneration automatic control device and a control method. Background technique [0002] Reach stacker is the abbreviation of container front crane. Reach stacker is a kind of crane used for loading and unloading containers. It is a kind of lifting equipment and can also be said to be a mobile machine. In the reach stacker, the lifting cylinder pushes the boom upwards, and the boom drives the spreader to lift heavy objects. An energy regeneration selector switch is installed in the reach stacker electrical control system. The switch is installed on the operator's console that is easy to operate in the cab. After the switch signal enters the vehicle controller, the vehicle controller outputs a high level to control the hydraulic energy The regenerative solenoid valve works. When the boom is raised, the hydraulic oil from...

AI Technical Summary

Problems solved by technology

Because after the pressure exceeds a certain value, it is difficult for the pressure oil in the upper chamber of the cylinder to flow into the lower chamber of the cylinder, so that the hydraulic oil in the upper chamber cannot be discharged and the lifting speed of the boom will be reduced, thereby reducing the working efficiency, and in the lifting When the action stops, because the energy regeneration solenoid valve is an on-off valve, if it is suddenly closed, the hydraulic oil route in the upper chamber of the cylinder, which originally communicated with the high-pressure oil in the lower chamber of the cylinder, suddenly communicates with the hydraulic oil tank. Due to the sudden change in pressure, the boom will vibrate seriously, reducing driving operator comfort

For this reason, the driver is unwilling to use this function, and the expected energy-saving effect cannot be achieved.

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