Dynamic analysis and simulation of four-axis forced synchronizing banana vibrating screen of variable linear trajectory

Liu, Chusheng; Zhang, Shimin; Haipei, Zhou; Li, Jun; Xia, Yunfei; Peng, Liping; Wang, Hong

doi:10.1007/s11771-012-1172-5

Cited by 33 publications

(15 citation statements)

References 5 publications

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“…eir study focused on vibrating screen fault diagnosis by performing a dynamical simulation on when the supports lose stiffness. Liu et al [30] proposed a linear model similar to that developed by He and Liu [28] by incorporating a quadruple excitation mechanism into the model. e model proposed by Baragetti and Villa [22] considers motion in a plane with three degrees of freedom.…”

Section: Introductionmentioning

confidence: 99%

“…ese linear models [27][28][29][30] assume that the angular motion of the vibrating screen is low and implement linearization as sin θ ≈ θ and cos θ ≈ 1, which is useful under nominal operating conditions where angular displacement is not significant. However, in practice, significant angular motion occurs in vibrating screens during startup [31], shutdown, and under off-design operating conditions [3].…”

Section: Introductionmentioning

confidence: 99%

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Dynamic Modeling of a Vibrating Screen Considering the Ore Inertia and Force of the Ore over the Screen Calculated with Discrete Element Method

Moncada

Rodríguez

2018

Shock and Vibration

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Vibrating screens are critical machines used for size classification in mineral processing. Their proper operation, including accurate vibration movement and slope angle, can provide the benefits of energy savings and cost reductions in the screening process and the whole mining process. Dynamic models of the vibrating screen movement available in the literature do not simulate ore motion or its interaction with screen decks. The discrete element method (DEM) allows for the calculation of the dynamic of the ore. In this paper, two 2D three-degrees-of-freedom dynamic models for a vibrating screen are tested, using linear and nonlinear approaches for angular displacement. These models consider the inertia of the ore and the ore force calculated with DEM. A double-deck linear motion vibrating screen is simulated using the DEM software LIGGGTHS. DEM is used to obtain the ore parameters in the steady state and the force on the screen decks. Two cases are compared: Case 1 considers the ore as moving together with the vibrating screen, and Case 2 considers the ore force on the screen deck as calculated by DEM. Simulations are carried out with data for an industrial vibrating screen used in copper mining. The force over the screen is significantly different between the cases. Case 1 produces a force that is unrealistic because the ore cannot produce a high-amplitude adhesion force over the screen decks. In Case 2, no adhesion force acts between the ore and deck. 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. The linear dynamic model considering the force as in Case 1 can be used to simulate a vibrating screen, as long as a correct calibration parameter is included to obtain an accurate motion amplitude.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Dynamic Modeling of a Vibrating Screen Considering the Ore Inertia and Force of the Ore over the Screen Calculated with Discrete Element Method

Moncada

Rodríguez

2018

Shock and Vibration

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“…This paper intends to use the SLK3661W double-deck linear mining vibrating screen as an exploration object, which has certain parameters, such as screen box mass (18,944 kg), spring stiffness of each unloading side (1,242,400 N/m), spring stiffness of each loading side (931,800 N/m), screen deck dimension (3.6 × 6.1 m), processing capacity (350-400 t/h), motor speed (1480 r/min), and electric power (55 kW). Numerical simulations were carried out, based on the Newmark-β algorithm, and the main parameters used in the simulation are shown in Table 1.…”

Section: Numerical Simulations Resultsmentioning

confidence: 99%

“…Mining vibrating screens are important equipment for mine washing and processing, and are widely used for mine grading, dehydration, and desliming in China [1,2], working as a forced vibration system under alternating loads [3][4][5]. The SLK3661W double-deck linear mining vibrating screen is shown in Figure 1, and its main structures include a screen box and four elastic supports, designed using principles of symmetry.…”

Section: Introductionmentioning

confidence: 99%

A Theoretical Rigid Body Model of Vibrating Screen for Spring Failure Diagnosis

et al. 2019

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Springs are critical components in mining vibrating screen elastic supports. However, long-term alternating loads are likely to lead to spring failures, likely resulting in structural damages to the vibrating screen and resulting in a lower separation efficiency. Proper dynamic models provide a basis for spring failure diagnosis. In this paper, a six-degree-of-freedom theoretical rigid body model of a mining vibrating screen is proposed, and a dynamic equation is established in order to explore the dynamic characteristics. Numerical simulations, based on the Newmark-β algorithm, are carried out, and the results indicate that the model proposed is suitable for revealing the dynamic characteristics of the mining vibrating screen. Meanwhile, the mining vibrating screen amplitudes change with the spring failures. Therefore, six types of spring failure are selected for simulations, and the results indicate that the spring failures lead to an amplitude change for the four elastic support points in the x, y, and z directions, where the changes depend on certain spring failures. Hence, the key to spring failure diagnosis lies in obtaining the amplitude change rules, which can reveal particular spring failures. The conclusions provide a theoretical basis for further study and experiments in spring failure diagnosis for a mining vibrating screen.

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“…Modeling. At present, the simplified 2-degree or 3-degree freedom mass-spring vibration model is often used in dynamic analysis of the vibrating screen [20,21]. However, the 2-degree vibration model can only represent the linear motion of the vibrating screen in two directions, and the 3-degree freedom vibration model can represent the swing around a certain axis in addition, and it is difficult to fully reflect the complex motion of the vibrating screen.…”

Section: Rigid Body Dynamicsmentioning

confidence: 99%

Dynamic Modeling and Parameters Optimization of Large Vibrating Screen with Full Degree of Freedom

Yang

Hua

et al. 2019

Shock and Vibration

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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 and modes of vibration) of the rigid body are obtained. The finite element modal analysis and harmonic response analysis are carried out to analyze the elastic deformation of the structure. By using the parametric modeling method, beam position is defined as a variable, and an orthogonal experiment on design is performed. The BP neural network is used to model the relationship between beam position and maximal elastic deformation of the lateral plate. Further, the genetic algorithm is used to optimize the established neural network model, and the optimal design parameters are obtained.

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Dynamic analysis and simulation of four-axis forced synchronizing banana vibrating screen of variable linear trajectory

Cited by 33 publications

References 5 publications

Dynamic Modeling of a Vibrating Screen Considering the Ore Inertia and Force of the Ore over the Screen Calculated with Discrete Element Method

Dynamic Modeling of a Vibrating Screen Considering the Ore Inertia and Force of the Ore over the Screen Calculated with Discrete Element Method

A Theoretical Rigid Body Model of Vibrating Screen for Spring Failure Diagnosis

Dynamic Modeling and Parameters Optimization of Large Vibrating Screen with Full Degree of Freedom

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