World Journal of Engineering Research and Technology (WJERT) has indexed with various reputed international bodies like : Google Scholar , Index Copernicus , Indian Science Publications , SOCOLAR, China , International Institute of Organized Research (I2OR) , Cosmos Impact Factor , Research Bible, Fuchu, Tokyo. JAPAN , Scientific Indexing Services (SIS) , Jour Informatics (Under Process) , UDLedge Science Citation Index , International Impact Factor Services , International Scientific Indexing, UAE , International Society for Research Activity (ISRA) Journal Impact Factor (JIF) , International Innovative Journal Impact Factor (IIJIF) , Science Library Index, Dubai, United Arab Emirates , Scientific Journal Impact Factor (SJIF) , Science Library Index, Dubai, United Arab Emirates , Eurasian Scientific Journal Index (ESJI) , Global Impact Factor (0.342) , IFSIJ Measure of Journal Quality , 

World Journal of Engineering
Research and Technology

An International Peer Reviewed Journal for Engineering Research and Technology

ISSN 2454-695X

Impact Factor : 5.218

ICV : 79.45

News & Updation

  • Article Invited for Publication

    Article are invited for publication in WJERT Coming Issue

  • WJERT New Impact Factor

    Its our Pleasure to Inform you that WJERT Impact Factor has been increased from 4.236 to 5.218 due to high quality Publication at International Level

  • ICV

    WJERT Rank with Index Copernicus Value 79.45 due to high reputation at International Level

  • WJERT SEPTEMBER ISSUE PUBLISHED

    SEPTEMBER 2018 Issue has been successfully launched on 1 September 2018

  • New Issue Published

    Its Our pleasure to inform you that, WJERT 1 September 2018 Issue has been Published, Kindly check it on http://wjert.org/home/current_issues

Indexing

Abstract

VIBRATION ANAYSIS OF A VIBRATORY SCREENING MACHINE

Oriaku, E.C. *, Agulanna, C. N, Ibeagha D. C, Adizue, U.L, Madubuko, E. C.

ABSTRACT

A vibratory system is a dynamic system for which the variables such as excitations (inputs) and responses (outputs) are time dependent. The response of a vibrating system generally depends on the initial conditions as well as the external excitation. Most practical vibratory systems are very complex, and it is impossible to consider all the details for a mathematical analysis. Only the most important features are considered in the analysis to predict the behavior under specified input conditions. Often, the overall behavior of the system can be determined by considering even a simple model of a complex physical system. In this work, a vibratory screening machine with two distinct sieve sizes of 0.25mm and 0.5mm was designed and fabricated. The average efficiency of the two sieve sizes under the same load condition was found to be 95% respectively. The responses of a forced, damped harmonic vibration with double degree of freedom (Vibration of Screen and frame) in the vertical direction of the designed vibratory screening machine were analyzed. The governing equations are derived, solved and results interpreted. The inputs into the system include the following; Mass of the machine frame (M1) = 35kg; mass of the vibratory screen with load M2 ranging from [20-30] kg at incremental intervals of 2kg; Equivalent Spring Constant for frame K1 = 25000N/m and Screen K2 = 16350N/m; Damping Constant, C2 = 20Ns/m; Static deflection force Fo = 2409.8N. The responses monitored are as follows: Particle discharge time through the sieve (t) ranged (1032 – 1744 secs); Particle flow rate through the sieve ranged from (0.896 ×10-4- 2.8 ×10-4) kg/sec; Phase Angle ? ranged = (0.0150 – 0.10); frequency ratio w/wn ranged from 9.3 -9.87, Amplitude of vibration (X) = 8.57×10-4 – 5.71 ×10-4m. These determinedparameters affect the efficiency of screening and can act as basis for the optimization of the system for other various load conditions.

[Full Text Article]