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First published in the February 2016 issue of Quarry Management as Screen Saver. Jeff Buxton, group sales manager with Don Valley Engineering Ltd, discusses condition monitoring for linear screen drives and vibrating machines
Vibrating screens are a widely applied form of particle separations. In spite of this significance, their understanding is still an obstacle. Three approaches were used to characterize the flow of granular material in a linear vibrating screen. The statistical model, mass action, andic model based on conservation of momentum were derived.
Regarding vibrating screen motion, He and Liu developed a threedegreeoffreedom linear model of a vibrating screen supported at two positions with equal stiffness for a circular motion vibrating screen. This model assumes stationary motion and a phase relationship between force and vibration of 0° in horizontal and vertical motion.
Regarding vibrating screen motion, He and Liu 15 developed a threedegreeoffreedom linear model of a vibrating screen supported at two positions with equal stiffness for a circular motion vibrating screen. This model assumes stationary motion and a phase relationship between force and vibration of 0° in horizontal and vertical motion.
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In 2013, the professor Du Changlong of China University of Mining and Technology proposed a kind of variable linear vibration screen used in coal industry Du et al., 2013. But the structure and working conditions of mining vibrating screenpletely different from the shale shaker used in them industry.
Mar 1, 2016 Linear vibrating screen is designed with dualvibration motor drive.Two synchronous motors are reversely placed so that the exciter generate reverse excitation force, the exciting force generated by eccentric block cancel each other out on the parallel direction of motor axis,and stack together with the perpendicular direction of motor axis, so its trajectory is linear.Linear
It is concluded that the linear dynamic model used in Case 2 is adequate to evaluate the influence of the ore on the movement of the vibrating screen. e linear dynamic model considering the force
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