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By absorbing the advanced technology from the world, we researched and designed PF series impact crusher.…
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Base on the plentiful experience of producing and marketing of impact crusher, Sofol R&D institution…
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Adopting technology from the world, PY Series spring cone crusher has an excellent performance in secondary…
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The vibrating screen is a kind of sieving equipment of international advanced level, developed by our…
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Sofol VSI Series vertical shaft impact crusher is designed by reputed German expert of Sofol and every…
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The DEM model for the screening process with a circular vibration motion is established and a series of simulations are conducted with the same conditions to those of laboratory experiments as listed in Table 2 for both spherical and non-spherical particles. ... The optimization method proves to be effective implementing on a linear vibrating ...
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Theory of Screening. The purpose of screening is to separate from a granular substance particles that are smaller than the screen opening from those that are larger. This is not …
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Dong et al. [23] used discrete element method (DEM) to study the screening effect of three-stage and five-stage banana screens under different parameters, with the same working condition, ... the amplitude of feeding end was larger than that of EAS-based screening process. The vibration energy reduced the repose angle of particles, …
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This study aims to predict the screening efficiency of pile rows in transversely isotropic (TI) saturated soils for ground vibrations subjected to moving loads. First, based on the fundamental solutions of TI saturated media, the boundary element method (BEM) was adopted to derive the force-deformation equation of the soil-pile …
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Recently, some novel screens were proposed based on the improved understanding of screening processes from particle-scale studies, one of which is the novel variable amplitude equal thickness vibration screen (VAETVS). This paper presents an investigation of using different aperture sizes to further …
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The aim of this work is to construct a novel BNN model to study the vibration screening kinetic of mixture materials, and further propose a method to determine the relationship between the BNN model coefficients and the structure and operation parameters of screening system. The basic idea includes the following aspects.
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Screening is a technique that is extensively adopted for the separation of discrete materials according to particle characteristics such as size and shape. Wide application of the discrete element method has sparked much research on the vibrating screen, which is a screening apparatus having a specific vibration mode.
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To strengthen the screening efficiency of traditional vibrating screens, a new type of vibrating screen, namely the composite vibrating screen, has been proposed based on …
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Mining screens, classification and separation are integral to ore processing, metals and minerals extraction, and controlling the final product quality in any mining and processing operation. Adopting efficient screening and separation solutions can increase yield and productivity while reducing environmental impact and minimising ore ...
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In reality, a large vibrating screen, which has a screen surface width of no less than 3.6 m and a screening area of no less than 20.0m 2, usually oscillates with extremely complex dynamic characteristics of the screen body [10, 11].As shown in Fig. 2 (b), generally, except for the dominated strong alternating load yielded by two box-type …
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Background: The purpose of this study was to validate the applicability of a new screening parameter of VPTW defined as the difference between the ascending and descending thresholds of vibrotactile perception to evaluation of the increasing risk of the neurological components of hand-arm vibration syndrome (HAVS) for repeated …
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The screening of particles with different vibration modes was simulated by means of a 3D discrete element method (3D-DEM). The motion and penetration of the particles on the screen deck were analyzed for linear, circular and elliptical vibration of the screen. The results show that the travel velocity of the particles is the fastest, but the ...
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The two-dimensional boundary element method in frequency domain is used to investigate the screening effectiveness of the open trench–wall barrier system on reducing vibration generated by a footing. Sheet piles or diaphragm walls are on both sides of the open trench as a vibration barrier in this study. The results showed that …
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The dynamic process of material vibration screening was simulated using discrete element method (DEM). By comparing the similarity between the material distribution established using biological neural network (BNN) and that obtained using DEM simulation, the optimum coefficients of BNN model under a certain screening parameter …
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This paper presents a study of the dynamics of the mixture on the screen during solid–liquid separation using vibration screening. The independent variables studied were g-force, volumetric concentration of solids in the feed, feed flow rate and inclination of the screen.
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In this work, a screening model for the vibrating screen was established based on the discrete element method. The screening process was simulated, and the screening efficiency could be obtained ...
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Recently, some novel screens were proposed based on the improved understanding of screening processes from particle-scale studies, one of which is the novel variable amplitude equal thickness vibration screen (VAETVS). This paper presents an investigation of using different aperture sizes to further optimize the VAETVS by the …
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Blasting is often a necessary part of mining and construction operations, and is the most cost-effective way to break rock, but blasting generates both noise and ground vibration. In urban areas, noise and vibration have an environmental impact, and cause structural damage to nearby structures. Various wave-screening methods have been …
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Many maintenance teams and service centers rely on vibration-based machine condition monitoring programs to maximize uptime and control maintenance costs. This places some of the responsibility for predicting machine failures on personnel who may be managing vibration data for hundreds of machines, sometimes in multiple facilities. …
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The process of vibration compaction of a two-component system by the method of vibration screening was investigated; it was shown that a density of up to 83% of the theoretical value is obtainable. 2.
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Revealed the effect of screening parameters on screen mesh local vibration. ... In this paper, based on the DEM-FEM co-simulation method, the effect of screening parameters on the dynamic response of the screen mesh is explored and the mechanism is revealed on the particle level. Firstly, a virtual experiment on a linear vibrating screen …
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Taking the excitation frequency, the mass flow rate and the shape of particles as variables, the screening accuracy of the vibrating screen is simulated and analysed by using the …
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The screening efficiency reached the maximum at 10.00 t·h −1 ·m −2 feeding speed. The impacts of screen body amplitude, frequency, and feeding speed on elastic screening performance with variable vibration intensity were found significant, and there were significant interactions among these parameters.
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Rolling bearings typically operate under time-varying conditions, which present challenges for fault diagnosis due to the presence of modulation effect and noise component in the bearing vibration signal. This paper introduces a novel feature extraction method that combines complementary ensemble empirical mode decomposition …
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The dynamic process of material vibration screening was simulated using discrete element method (DEM). By comparing the similarity between the material distribution established using biological neural network (BNN) and that obtained using DEM simulation, the optimum coefficients of BNN model under a certain screening parameter …
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Background & objectives: Vibration perception threshold (VPT) is considered as a gold standard for diagnosis of diabetic peripheral neuropathy. However, the data are sparse comparing the VPT with commonly used bedside modalities. This study was carried out to evaluate the usefulness of simple bed side screening modalities for peripheral …
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The discrete element method was utilized to construct three-dimensional discrete element models for the rice mixture, and their motions were analyzed numerically on a planar vibration screening device. The results showed that, after falling onto the vibrating screen surface, the mixture undergoes a reciprocating motion within the same …
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In order to achieve the levels of ground vibration specified in standards, effective and efficient methods of screening the ground vibration is a growing concern. Ground vibration can be reduced by decreasing …
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Screening performance and reliability of vibrating screen depend on three aspects. •. Kinetic properties of screen body by dynamic modeling are summarized. •. Screening …
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