Crane stringer rate acquisition method, system and crane

Abstract

The invention discloses a method and a system for acquiring multiplying power of a sling of a crane. The method for acquiring the multiplying power of the sling of the crane comprises: utilizing the principle that a fixed pulley of the crane rotates at specific speed under the action of friction force of the sling, generating corresponding electrical signals according to revolution speed of the fixed pulley, and converting the electrical signals into a revolution speed value; and determining the number of the fixed pulleys rotated by the friction force of the sling by judging whether the revolution speed value is within a specific speed range, and acquiring the multiplying power of the sling according to relation between the number of the rotating fixed pulleys and the multiplying power of the sling to reduce influence of human factors on the multiplying power of the sling, so as to ensure reliability for acquiring the multiplying power of the sling. The system for acquiring the multiplying power of the sling of the crane is used for achieving the method, and has the same technical effect. The method and the system for acquiring the multiplying power of the sling of the crane are suitable for the control on the crane, in particular for safety control on the crane.

Description

technical field [0001] The invention relates to crane control technology, in particular to a crane rope magnification acquisition method and a crane rope magnification acquisition system, and also relates to a crane with a crane rope magnification acquisition system. Background technique [0002] The rope magnification is an important parameter of the hoisting machinery, which indicates the number of ropes that can bear the load. Under the condition of constant load, the larger the rope magnification, the more the number of slings that bear the load when the crane is hoisting, the more labor-saving the hoisting, but the slower the hoisting speed; The fewer the number of lifting ropes for the load, the greater the driving force is required for hoisting, but the hoisting speed will be faster. When the load is small, the magnification of the hoisting rope of the crane needs to be reduced to increase the hoisting speed; when the load is large, the magnification of the hoisting ...

AI Technical Summary

Problems solved by technology

[0005] At present, the magnification of the lifting rope of the crane is usually visually identified by the operator. Due to the instability of the operator's experience, operating environment or other factors, the input of the slinging rope magnification is often wrong, which affects the torque limiter to obtain an accurate torque percentage. Further affect the safety and normal operation of the crane

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