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

Liu, Yue; Suo, Shuangfu; Meng, Guoying; Shang, Dajing; Bai, Long; Jianwen, Shi

doi:10.3390/math7030246

Cited by 9 publications

(5 citation statements)

References 22 publications

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“…Six kinds of spring failure were selected for simulations, and the results indicated that the spring failures led to an amplitude change of the four elastic support points in the x, y, and z directions, where the changes depended on certain spring failures. The conclusions provided a theoretical basis for further study and experimentation on spring failure diagnosis for mining vibrating screens [29].…”

Section: Introductionmentioning

confidence: 90%

“…Furthermore, several kinds of spring failure were selected, as shown in Table 2. In [29], the stiffness variation coefficient (SVC) ∆k i and the amplitude variation coefficient (AVC) ∆λ id are proposed for normalization of the stiffness and amplitude change, namely,…”

Section: Spring Failure Analysismentioning

confidence: 99%

“…Failure diagnosis requires accurate dynamic modeling and system identification [6]. In recent years, many studies have reported on the dynamic modeling [7][8][9][10], dynamic design [11][12][13][14], dynamic optimization [15][16][17][18][19][20], particle motion analysis [21][22][23][24], and spring failure diagnosis of vibrating screens [25][26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Spring Failure Analysis of Mining Vibrating Screens: Numerical and Experimental Studies

et al. 2019

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Spring failure is one of the critical causes of the structural damage and low screening efficiency of mining vibrating screens. Therefore, spring failure diagnosis is necessary to prompt maintenance for the safety and reliability of mining vibrating screens. In this paper, a spring failure diagnosis approach is developed. A finite element model of mining vibrating screens is established. Simulations are carried out and the spring failure influence rules of spring failure on the dynamic characteristics of mining vibrating screens are obtained. These influence rules indicate that the amplitude variation coefficients (AVCs) of the four spring seats in the x, y, and z directions can reveal two kinds of single spring failure and four kinds of double spring failure, which are useful for diagnosing spring failure. Furthermore, experiments are conducted. Comparison analyses of the experimental results and simulation results indicate that the proposed approach is capable of revealing various kinds of spring failure. Therefore, this approach provides useful information for diagnosing spring failure and guiding technical staff to routinely maintain mining vibrating screens.

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Section: Introductionmentioning

confidence: 90%

Section: Spring Failure Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spring Failure Analysis of Mining Vibrating Screens: Numerical and Experimental Studies

et al. 2019

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“…The amplitude of the vibrating screen will increase significantly due to resonance, and it will also affect service life of the equipment. The vibrating screen usually uses rubber or metal springs as support, which is also a vibration isolation device with the installation foundation [3,4]. Even though with simple structure and low price, the common isolators cannot adjust the stiffness and make corresponding changes according to the actual working conditions, which leads to their poor vibration isolation efficiency and large noise.…”

Section: Introductionmentioning

confidence: 99%

Development of an electrorheological elastomer isolator working in shear-squeeze mixed mode

Niu¹,

Dong²,

Xiong³

et al. 2023

Smart Mater. Struct.

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The vibrating screen equipment will resonate through the resonance region during startup and shutdown stage. However, the stiffness and damping of the traditional passive vibration isolator cannot be adjusted in use, which leads to the unsatisfactory vibration isolation effect of that on the installation foundation of vibrating screen. In this paper, based on the characteristics of electrorheological elastomer (ERE) with tunable storage modulus, a variable stiffness ERE isolator in shear-squeeze mixed mode is developed. At the first step, the EREs used for the isolator was prepared, and the dynamic viscoelastic properties were measured. After that, the structure of ERE isolator was designed, and the vibration isolation effect of the ERE isolator for vibrating screen was analyzed by simulation. The simulation results demostrate the resonance amplitude and stopping time of the vibrating screen in startup and shutdown stage will decrease with the ascending electric field strength. Finally, the shear-squeeze mixed-mode ERE isolator was tested on electro-dynamic shaker. The experimental results indicate that the ERE isolator has a better effect of vibration reduction with increased electric field strength in startup and shutdown stage of vibrating screen, and the acceleration transmissibility by ERE isolator is reduced 37.6% under 3 kV/mm.

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“…In the literature, we can find spatial models of vibrating conveyors. However, these models are simplified to the dynamics of the movement of the trough in which the vibrator action is replaced by a concentrated axial force [12]. Such models cannot reflect the couplings between vibrators and the body [6] and thus the process of self-synchronisation of the vibrators, which is extremely important for the correct operation of the machine [9][10] [8][1] [22] [19] [21] cannot be captured.…”

Section: Introductionmentioning

confidence: 99%

A Spatial Model of a Vibrating Conveyor Taking Into Consideration The Self-Synchronisation Process of Inertial Vibrators. Analysis of The Effect of The Layout of The vibrators On The Operation of The Conveyor

Cieplok

Sieńko

2021

Preprint

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This article presents a spatial model of a vibrating conveyor supported on steel-elastomer vibration isolators and vibrated by two inertial vibrators as well as the results of analyses of the effect of the layout of vibrators on the operation of the conveyor. The displacement of the line of action of the resultant of the forces of the vibrators beyond the centre of mass of the machine body manifests itself in the departure of the machine body from the desirable rectilinear motion and problems associated with the unevenness of material movement. The model presented in this article takes into account an extremely important coupling between vibrators and the body of the machine, which is responsible for the process of self-synchronisation of the vibrators and the correctness of machine operation. The results of theoretical analyses presented in this paper were verified by laboratory tests and reference to observations based on the authors’ industrial experience.

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

Cited by 9 publications

References 22 publications

Spring Failure Analysis of Mining Vibrating Screens: Numerical and Experimental Studies

Spring Failure Analysis of Mining Vibrating Screens: Numerical and Experimental Studies

Development of an electrorheological elastomer isolator working in shear-squeeze mixed mode

A Spatial Model of a Vibrating Conveyor Taking Into Consideration The Self-Synchronisation Process of Inertial Vibrators. Analysis of The Effect of The Layout of The vibrators On The Operation of The Conveyor

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