Traditional vibrating screen usually adopts the linear centralized excitation mode, which causes the difficulty in particles loosening and low screening efficiency. The The natural frequencies are all much higher that the applied load one equal to 104.7 rad/s, thus preventing any resonance problem of the plates composing the Innovative structural solution for heavy loaded vibrating screens
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amplitude, vibration frequency, vibrating direction angle and slope angle of screen surface are selected for single factor simulation test, and the variation of 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 Dynamic Modeling and Parameters Optimization of Large Vibrating
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Abstract. In this paper, the dewatering and screening process of vibrating-dewatering screen is studied by the combination of simulation test and physical 1. Introduction Ability to diminish the occurrence of a vibrating screen structural failure under various loading scenarios requires a great deal of attention during Failure and sensitivity analysis of a reconfigurable vibrating screen
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In this work, the dynamic characteristics and screening performance of the disc spring vibration screen are studied. The modal simulation and experimental results show that the model vibration North University of China, School of Mechanical Engineering, China. This paper investigates the screening characteristics of the multi-layer vibrating screens. A portable linear screen Analysis of the Screening Accuracy of a Linear Vibrating
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In this paper, we obtain the factors affecting the motion characteristics of the vibrating screen by theoretical derivation and experimental measurement of the The vertical modal frequencies are 12.55 Hz and 14.84 Hz, which is similar to the working frequency 14.28 Hz of the vibrating screens. Therefore, the larger vertical vibration responses of the second and third floors are mainly caused by the two order modes induced by the vibrating screens [ 29 ].Buildings Free Full-Text Vibration Test and Control of
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In this paper, the effects of vibration parameters of a banana screen, i.e. frequency, amplitude and vibration direction angle, on the screening efficiency per unit time were studied using theFor the clean and efficient utilization of coal, coal preparation is an important measure to solve the problem of air pollutant emissions, solid waste generation and save coal resources in the world [1, 2].Screening is the basic process for cleaning and efficient utilization of coal, and is mainly realized via vibrating screen [3].A conventional large A review on the advanced design techniques and methods of vibrating
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natural frequencies of the high-frequency vibrating screen change little with K3, while the third natural frequency increases from 69.8 rad/s to 97 .85 rad/s with K3. When the stiffness K3 reachesThe first three natural frequencies of the vibrating screen are lower, and the second- and third-order frequencies are similar. (2) In order to avoid resonance, the design requires that the operating frequency of the vibrating screen must deviate from 10% of its natural frequency . In this study, the motor’s operating frequency was 16 Hz.Structural Analysis and Optimization Design of Linear Vibrating Screen
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16.9. 8. Conclusions. A new structural solution for high loaded vibrating screens was proposed in this paper. The new concept consists of increasing the structural and functional performance of the screen by means of a modification of the two side-walls of the mechanical system.Then the Sommerfeld effect around the natural frequencies (NFs) is further revealed. The correctness of theoretical analyses is examined by simulation and the experiment. It’s shown that the reasonable working point in engineering should be selected in the sub-resonant region with respect to the natural frequency of the main vibrating system.Stability and Sommerfeld effect in a multi-resonant types vibrating
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Then the novel application of non-linear regression modeling based on Support Vector Machines (SVMs) is used for mapping the sample space of operating parameters and vibrating screen configuration. Lastly, parameter optimization is implemented using Particle Swarm Optimization (PSO) algorithm. The primary findings In previous studies about the synchronization of vibrators, the restoring forces of springs are mainly treated as linear directly, whereas the nonlinear features are rarely considered in vibrating systems. To make up this drawback, a dynamical model of a nonlinear vibrating mechanical system with double rigid frames (RFs), driven by two Synchronization and Stability of a Nonlinear Vibrating Mechanical
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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 We designed a tuned liquid damper (TLD) with the purpose of mitigating vibrations in a vertical irregular three-story structure. We used aluminum bars for the modeling the stories and harmonic steel bars for the beams. For the shaking table, we used a solid block of aluminum weighing around 130 kg.Experimental Investigation on Structural Vibrations by a New
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The nature of the dependence f 01 (c y, l 1) indicates a significant nonlinear influence of the mentioned factors.In this case, having intermediate supports with appropriate stiffness c y, it is possible to calculate their position l 1, which will provide the initial value f 01 *.As a result of the increase c y = 5 10 7 N/m, the frequency ratio In this paper, a state of configurations achieved by RVS as compared to the existing conventional vibrating screens was made. In addition to this, a market assessment of the proposed RVS and other existing screening technologies was performed. The index parameters used for this analysis are capacity, reliability, efficiency, versatility Assessment of Reconfigurable Vibrating Screen Technology
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Vibrating screen is a kind of common large-scale mechanical equipment used for screening or size measurement of rock and ore in mining engineering. 1 At present, there are many kinds of vibrating screens in industry such as linear vibration screen, 2 resonance screen, 3 circular vibration screen, 4 and banana screen. 5 Among them, due The double-layer high-frequency vibrating screen machine is widely used in the tobacco industry, and its controllability of vibration has a great influence on the screening quality of cut tobacco. In this paper, we obtain the factors affecting the motion characteristics of the vibrating screen by theoretical derivation and experimental measurement of the Controlled experimental research and model design of
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Typically the sound levels around these machines range from 90 to 95 dB during clean bituminous coal processing, and from 95 to 100 dB during refuse and anthracite processing 11. To reduce noise exposure within the preparation plants, NIOSH developed engineering noise controls for vibrating screens in a partnership with Conn-Weld economic benefits. For the research of vibrating-dewatering screen, domestic and foreign scholars have done a lot of work in the following aspects. In improving dewatering performance, Dong et al.1,2 developed a vibrating-dewatering screen with a unique structure that uses side plate beam excitation. Shi3 studied the high-frequency Advances in Mechanical Engineering 2021, Vol. 13(9)
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Large-scale vibrating screens are widely used in minerals processing industry. One of main components in any vibrating screen is a set of springs supporting the main body of machine with sievingVibrating screens are critical machines used for size classification in mineral processing. eir proper operation, including accurate vibration movement and slope angle, can provide the benefits ofModeling and parameter optimization for the design of vibrating screens
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Large-scale vibrating screens are widely used in minerals processing industry. One of main components in any vibrating screen is a set of springs supporting the main body of machine with sieving
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