Cantilever crane variable-amplitude synchronous movement hydraulic system, operation machine and control method

Abstract

The invention relates to the field of hydraulic systems, and provides a boom variable-amplitude synchronous movement hydraulic system, an operation machine and a control method.The hydraulic system comprises a first variable-amplitude oil cylinder and a second variable-amplitude oil cylinder, and a rod cavity of the first variable-amplitude oil cylinder is communicated with a rodless cavity of the second variable-amplitude oil cylinder; pistons of the first variable-amplitude oil cylinder and the second variable-amplitude oil cylinder are each provided with a hydraulic oil channel, and rod cavities and rodless cavities in the two ends of the pistons are communicated through the hydraulic oil channels. A control valve for controlling the hydraulic oil channel to be opened and closed is arranged on the hydraulic oil channel, and when the piston moves to the end of the rod cavity, the control valve is opened. According to the boom variable-amplitude synchronous movement hydraulic system, the operation machine and the control method, automatic exhaust of the double oil cylinders can be achieved, and accumulative errors can be automatically eliminated.

Description

technical field [0001] The invention relates to the technical field of hydraulic systems, in particular to a hydraulic system for boom luffing synchronous motion, a working machine and a control method. Background technique [0002] The articulating arm aerial work vehicle is a lifting device used for aerial work. When the aerial work platform can be lifted to any position across obstacles, it can be operated while walking. It is widely used in municipal, electric power, street lights, advertising, communication, photography, Installation and maintenance and climbing operations in gardens, transportation, docks, airports and ports, large industrial and mining enterprises and other industries. [0003] At present, the articulated boom aerial work platform is equipped with an upper folding arm and a lower folding arm, and the movement of the boom is controlled by the synchronous movement of the upper folding arm and the lower folding arm. The current control scheme of the boom...

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Problems solved by technology

[0004] The present invention provides a hydraulic system, operating machinery and control method for boom variable amplitude synchronous movement, which are used to solve the defects in the prior art that oil cylinders are difficult to exhaust and accumulated errors are difficult to eliminate, realize automatic exhaust of double oil cylinders, and automatically eliminate accumulated errors

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