A Load Identification Method of Hoisting System Based on the Shaft Strain of the Guide Wheel

Abstract

The invention discloses an identification method for lifting system load based on guide wheel axial strain. The identification method comprises the following steps that the length change of a steel wire rope in the constant-speed lowering process is collected in real time through a position signal encoder on the steel wire rope, so that the change of lifting load is obtained in the lowering process, meanwhile, stress strain signals on the guide wheel shaft are collected in real time through strain gauges, the change of lifting load and the stress strain signals are subjected to comparison andcalibration to obtain a load change curve of the lifting system in one circulation process of lowering-loading-lifting-unloading, then the obtained load change curve is compared with a lifting load change curve monitored in real time, so that the running state of the system can be judged, the occurrence of accidents is judged and avoided in time by identifying the lifting system load, the measurement accuracy is high, and the work is stable and reliable. According to the identification method for the lifting system load based on the guide wheel axial strain, the stress strain signals are directly collected through a strain collecting instrument, the measurement process is simple, and the implementation is easy; and moreover, the real-time performance is high, compared with sensor detection, the identification method has the advantages that the measurement accuracy is high, a battery does not need to be replaced, and the use and maintenance are convenient.

Description

Technical field [0001] The invention relates to a method for identifying the load of a hoisting system based on the strain of a guide wheel shaft, and belongs to the technical field of load identifying of a mine hoisting system. Background technique [0002] In the mine hoisting system, most of the safety accidents in the hoisting link are related to the hoisting system load. The normality of the hoisting system load will directly affect the safe production of the mine. Therefore, the correct identification of the hoisting system load is very important. Carry out early diagnosis and warning of the lifting system by identifying the load of the lifting system. However, in the current mine hoisting system, there is no reliable load identification method. [0003] The existing method for identifying whether the load of the mine hoisting system is abnormal is to install the sensor on the hoisting wire rope or the hoisting container. Due to the complicated working conditions such as hum...

AI Technical Summary

Problems solved by technology

However, in the current mine hoisting system, there is no reliable load identification method

[0003] The existing method for identifying whether the load of the mine hoisting system is abnormal is to install the sensor on the hoisting wire rope or the hoisting container. Due to the complicated working conditions such as humidity inside the shaft, this method is not suitable for the ultra-deep mine hoisting system, and it is easy to Affected by interference, the structure of the steel wire rope will be destroyed, the fatigue wear of the steel wire rope will be aggravated, and its life will be seriously lost. The measurement accuracy is not high, the installation is inconvenient, and the installation and maintenance of the sensor is inconvenient. On the bypass of a balance oil cylinder, this installation method will lead to unstable oil pressure of the balance device due to various uncertain dynamic loads when the lifting system accelerates or decelerates and brakes, and there are disadvantages such as hydraulic shock, which will cause the tension monitoring of the lifting system The data is unstable, resulting in inaccurate lifting system load data

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