Study on screening performance and parameters optimization of double relatively independent vibrating screen

Dynamic characteristic and reliability of the vibrating screen are important indicators of large vibrating screen. Considering the influence of coupling motion of each degree of freedom, the dynamic model with six degrees of freedom (6 DOFs) of the vibrating screen is established based on the Lagrange method, and modal parameters (natural frequencies and modes of vibration) of the rigid body are obtained. The finite element modal analysis and harmonic response analysis are carried out to analyze the elastic deformation of the structure. By using the parametric modeling method, beam position is defined as a variable, and an orthogonal experiment on design is performed. The BP neural network is used to model the relationship between beam position and maximal elastic deformation of the lateral plate. Further, the genetic algorithm is used to optimize the established neural network model, and the optimal design parameters are obtained.

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Vibration Characteristics of an Industrial-Scale Flip-Flow Screen with Crank-Link Structure and Parameters Optimization

Shock and Vibration ◽

10.1155/2021/2612634 ◽

2021 ◽

Vol 2021 ◽

pp. 1-16

Author(s):

Hongxi Li ◽

Chusheng Liu ◽

Ling Shen ◽

Lala Zhao

Keyword(s):

Rotational Speed ◽

Kinematic Model ◽

Maximum Error ◽

Vibration Characteristics ◽

Parameters Optimization ◽

Industrial Scale ◽

Efficient Operation ◽

Link Structure ◽

Screening Performance ◽

Screen Surface

Flip-flow screens are increasingly used in the processing of fine wet coal. In this work, the vibration characteristics of an industrial-scale flip-flow screen with crank-link structure (FFSCLS) were investigated theoretically and experimentally. An improved kinematic model of FFSCLS was proposed and experiments are carried out to verify the reasonability. The effects of the key parameters of the eccentricity of the crankshaft, the rotational speed of the crankshaft, and the tension length of the screen surface on the vibration characteristics of the screen were investigated parametrically. The results show that the kinematic model can describe the vibration characteristics of screen perfectly with the maximum error between the theoretical and experimental results being within 6.96%. Moreover, the key parameters of the eccentricity of the crankshaft, the rotational speed of the crankshaft, and the tension length of the screen surface have significant effects on the vibrations of the screen body and screen surface. These parameters should be optimized to achieve maximum screening performance of the FFSCLS. This work should be useful for optimal design and efficient operation of the flip-flow screen.

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Design and Efficiency Research of a New Composite Vibrating Screen

Shock and Vibration ◽

10.1155/2018/1293273 ◽

2018 ◽

Vol 2018 ◽

pp. 1-8 ◽

Cited By ~ 1

Author(s):

Zhanfu Li ◽

Xin Tong ◽

Bi Zhou ◽

Xiaole Ge ◽

Jingxiu Ling

Keyword(s):

Dynamic Analysis ◽

Systems Theory ◽

Processing Capacity ◽

Experiment Research ◽

Vibrating Screen ◽

Swing Angle ◽

Screening Performance ◽

Screening Efficiency ◽

Vibration Parameters ◽

Two Degree Of Freedom

A new composite vibrating mode is presented in this paper. Modeling and dynamic analysis are studied according to two-degree-of-freedom systems theory. The effects of vibration parameters, including swing angle, swing frequency, vibrating direction angle, and translation frequency, on the screening efficiency were researched by means of experiment research over a new laboratory-scale composite vibrating screen which is designed based on the new composite vibrating mode. The results are analysed in terms of curves and fitting equations. Compared to the translation mode and swing mode, the screening performance of the new composite vibrating mode, both in screening efficiency and in processing capacity, is significantly improved.

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