Load-bearing characteristics of hoisting wire rope of a vertical shaft with multi-rope friction based on line scanning image technique

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Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (5) : 36-41.

CAI Xiang, CAO Guo-hua,WEI Lei, WANG Lei, WANG Hai-xin

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Abstract

In order to easily and quickly identify health operating state of hoisting wire rope of a vertical shaft with multi-rope friction, a method based on the line scanning image technique was proposed to detect transverse vibrations of hoisting wire rope at the boundary of the friction wheel and evaluate its load-bearing characteristics. Firstly, the line scanning image acquisition program was developed with VC++ to realize transverse vibration detection of hoisting wire rope and real-time recording. Secondly, the image edge extraction algorithm based on wavelet transformation was applied to recognize relative vibration deflections of hoisting wire rope. Finally, based on band pass filters and FFT transformation, transverse vibration natural frequencies of middle chord rope and load-bearing characteristics of hoisting wire rope were obtained in the process of the hoisting system running at a constant speed. Tests indicated that the proposed method can be used to overcome difficulties of recognizing the tension force of hoisting wire rope of a vertical shaft with multi-rope friction, it provides a guarantee for health running of vertical shaft hoisting systems with multi-rope friction.

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line scanning technique / wavelet transformation / band pass filter / FFT transformation

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CAI Xiang, CAO Guo-hua,WEI Lei, WANG Lei, WANG Hai-xin. Load-bearing characteristics of hoisting wire rope of a vertical shaft with multi-rope friction based on line scanning image technique[J]. Journal of Vibration and Shock, 2018, 37(5): 36-41

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