Vibrating screen fault feature extraction method and fault monitoring system

Abstract

The invention discloses a vibrating screen fault feature extraction method and a fault monitoring system. The method includes the following steps of (1) collecting acceleration signals of vibrating screen fault features; (2) selecting the skewness factor, peakedness factor, margin and peak value of the acceleration signals to extract the time domain feature quantity, and conducting three-layer wavelet decomposition on the acceleration signals through discrete wavelet transform to extract the frequency domain feature quantity; (3) analyzing and calculating the model diagnosis rate of the extracted time domain feature quantity and frequency domain feature quantity by using a fault diagnosis model based on principal component analysis and a support vector machine. The vibrating screen fault feature extraction method and the fault monitoring system have an automatic monitoring function and can provide convenience for users in use and maintenance, effectively lower the production cost, improve the production efficiency and bring good economic benefits and social benefits to enterprises.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a vibrating screen fault feature extraction method and a fault monitoring system. Background technique [0002] The vibrating screen is a kind of screening equipment that uses the exciting force of the exciter to generate reciprocating motion. In recent years, it has increasingly become an indispensable and important equipment in the development of the quarry industry, and even plays a vital role in the development of social and economic industries. However, the components of its main structure bear alternating loads for a long time during the working process, and the damage of the equipment structure is inevitable. In addition, the working environment of the vibrating screen is harsh, and it is often placed outdoors, which is not easy to overhaul. Once the vibrating screen breaks down during operation, it will inevitably cause huge economic losses to the enterprise. Under ...

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Problems solved by technology

However, the components of its main structure are subjected to alternating loads for a long time during the working process, and damage to the equipment structure is inevitable.

In addition, the working environment of the vibrating screen is harsh, and it is often placed outdoors, which is not easy to overhaul. Once the vibrating screen fails during operation, it will inevitably cause huge economic losses to the enterprise.

Under normal circumstances, enterprises start to overhaul the equipment after the vibrating screen fails. For obvious faults such as broken screens and spring failures, related parts can be replaced for maintenance, and more serious faults such as screens Faults such as serious yaw and broken discharge port are difficult to eliminate, and it is not easy to find out the cause of the fault

Vibrating screen fault diagnosis is still only a manual fault diagnosis method in the traditional sense. Generally, it uses the rich experience of workers to carry out "look, smell, ask, cut" fault handling methods through sensory organs, without a special equipment Or instrument to carry out systematic fault diagnosis for the vibrating screen

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