Pitching hydraulic system, closed-loop control system and control method of stacker-reclaimer

Abstract

The invention discloses a stacker-reclaimer pitching hydraulic system, a close loop control system and a control method. The system comprises a main loop for controlling the stacker-reclaimer suspension arm pitching mechanism to move, a hydraulic control check valve control loop for providing inverse opening pressure to a hydraulic control check valve, and a manual control loop for supplying power to the system when the system is power-off or has fault. According to the stacker-reclaimer pitching hydraulic system, the close loop control system and the control method, the design requirement is achieved through controlling the speed of the pitching hydraulic cylinder and the vertical displacement of the suspension arm to make sure that the stacker-reclaimer can operate highly efficiently, stably and reliably.

Description

technical field [0001] The invention relates to the field of bucket-wheel stacker-reclaimer mechanical equipment, in particular to a stacker-reclaimer pitch hydraulic system, a closed-loop control system and a control method. Background technique [0002] The stacker-reclaimer is a track-type loading and unloading machine that uses the bucket wheel to continuously take materials and then uses the belt conveyor of the equipment itself to continuously stack materials. It is mainly composed of bucket wheel mechanism, slewing mechanism, pitching mechanism, cart traveling mechanism, tail car, belt conveyor and upper steel structure and other components; among them, the pitching mechanism of the stacker-reclaimer includes two types of mechanical and hydraulic, hydraulic The type pitching mechanism is widely used because of its small structure, flexible configuration, reliable operation, and convenient assembly. [0003] The schematic diagram of the connection between the pitching...

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Problems solved by technology

[0008] In view of the defects existing in the prior art, the object of the present invention is to provide a stacker-reclaimer pitch hydraulic system, which can solve the problem of the low energy utilization rate of the existing stacker-reclaimer pitch hydraulic system and the inability to accurately adjust the flow rate of the hydraulic system. To meet the design requirements by controlling the speed of the pitching hydraulic cylinder and the vertical displacement of the cantilever to ensure that the stacker-reclaimer can operate efficiently, stably and reliably

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