Crane and device and method for correcting inclination angle of lifting hook of double-winch system of crane

Abstract

The invention discloses a crane and a method and a device for correcting an inclination angle of a lifting hook of a double-winch system of the crane. An inclination-angle sensor is arranged on a cross beam on the inner side of the lifting hook; a control device controls the operation of a main winch system, so that the absolute value of the inclination angle of the lifting hook is larger than a preset angle value; the control device selects a synchronous control mode to lift the lifting hook, takes the absolute value of the inclination angle of the lifting hook and carries out differential operation; when the differential value of the absolute value of the inclination angle of the lifting hook is larger than a set threshold, the control device enables the inclination angle of the lifting hook acquired by the inclination-angle sensor to be multiplied by -1 for correction. The correcting device, the correcting method and the crane disclosed by the invention have the advantages that by automatic identification and correction on the installation direction of the inclination-angle sensor, the operation for guaranteeing the forward direction of the sensor by manual installation is avoided, the installation process of the sensor is simplified, the installation time of the sensor is saved, the problem of the backward direction in manual installation is solved, and the effectiveness and the reliability of synchronous control are ensured.

Description

technical field [0001] The invention relates to the technical field of engineering machinery, in particular to a device and method for correcting the inclination angle of a hook in a double winch system of a crane, and a crane. Background technique [0002] At present, on large-tonnage crawler cranes, in order to improve the lifting capacity of the crane, double winches are driven simultaneously to lift the hook. However, due to the difference between the double hoisting systems, the operation of the double hoisting systems is not synchronized, which in turn causes the hook to tilt and aggravates the wear of the wire rope and the pulley block. In order to solve the problem of synchronous operation of the double hoist system of the crane, it is proposed to install an inclination sensor on the hook to directly detect the synchronization error of the operation of the double hoist system, and implement synchronization control based on the inclination feedback. This synchronous ...

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Problems solved by technology

Since the winding position of the main and auxiliary hoisting wire ropes on the hook pulley block (left pulley block or right pulley block) is not strictly limited by the operation specification, the installation direction of the inclination sensor is often in a "reverse" state, resulting in a greater synchronization deviation. getting bigger

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