Gdzs2460 / 2 Efficient Unit Combination Of Shaker Design And Screen Frame Finite Element Analysis

The vibrating screens with high screening efficiency and high production is the new direction to study and develop all the time. In the traditional design of screen machine in our country, the study of structural strength of the vibrating screen reel generally applies to calculating and analyzing the statics strength only. It doesn't consider the influence of dynamic property of high order and partial structure on the reel structure. But the vibrating screen reel frame is easily damaged in the impact of cyclic loading of exciting force.Basising on the traditional vibrating screens with double width and different frequency and under the dynamic design theory,this paper makes some designs on the GDZS2460/2 high-efficiency unit combining vibrating screen ,including the program design,the designs on motion parameters and Process parameters, dynamics design with the relative calculations and analysis.The paper also involves the 3D modling of the whole screen machine in solidworks . This kind of vibrating screen is made up of two units having unique shock excitation equipment respectively. In this way, it can realize two kinds of vibrating parameters, one with high frequency and little amplitude and the other with low frequency and large amplitude. We can realize the principle of screening process with constant bed thickness because of the two unit-sieves adopting different dip angle arrangements. We can greatly increase the screening rate and operational load, especially suitable for the dehydration of humid fine particle material. In addition, in order to solve the practical engineering problems, this article has done the static analysis, modal analysis and harmonic response analysis of the unit vibration screen by useing the large finite element analysis software ANSYS10.0. Static analysis has showed the distribution of stress and strain of screen box structure under static loading. The distribution of strain has proved that the maximum displacement is at the feed side, and the value is about 5.5mm; the distribution of stress has showed that the stress concentration areas is at the channel beams and side connections, where the equivalent stress is 44.8Mpa.This value meets the requirements of static strength calculation and is far below the allowable stress value. Harmonic response analysis has showed the steady-state response of screen box structure under dynamic loading. We can find that the distribution of stress and strain of screen box structure are much the same by comparing the two results. But the stress value at the channel beams and side connections under dynamic loading is 24.2Mpa,which is very closed to the allowable shaker stress, so this area is prone to failure site. It proves that we must take account of the alternating loading when we make the strength calculations of vibration screen. Modal analysis has showed the first 15 natural frequencies and their corresponding vibration mode of the unit screen. The result shows that the vbration screen operating frequency close to the two natural frequencies and frequency difference at the operating frequency 10% or more, vibrating screen does not occur in the course of their work the phenomenon of resonance, in line with the dynamic design requirements.The results prove that the design is meetting the design specifications of vibration screen, but area at the channel beams and side connections is prone to failure of the site. This papper and provide a foundation for the amendment of designing the vibrating screen and has a reference value to the similar problems.