A novel vibration isolator for vibrating screen based on magnetorheological damper

Wu, Mingzhuang; Chen, Fei; Li, Aimin; Chen, Ziye; Sun, Nana

doi:10.1007/s12206-021-0906-4

Cited by 9 publications

(6 citation statements)

References 17 publications

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“…Despite the fact that different studies have used slightly different constructions of screens and MR dampers, a valuable qualitative comparison could still be carried out. A study presented by the other authors [56] showed a difference in the damping of the resonance tested for three similar configurations with or without an MR damper in the vibrating screen. The examined vibration screen exhibited an amplitude of vibration for nominal excitation frequency close to 4 mm, which is twice that applied in the current research.…”

Section: Simulation Results Of Passive Suspensionmentioning

confidence: 88%

“…Correlation dimension analysis was similarly carried out for different constant control currents only. That analysis was extended in [56], where preliminary experiments were carried out for a single MR damper. Further, it was indicated that constant control current can be used for mitigation of extensive vibrations occurring during the start-up and stopping phases of the screen's operation.…”

Section: Introductionmentioning

confidence: 99%

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Trajectory Control for Vibrating Screen with Magnetorheological Dampers

Ogonowski

Krauze

2022

Sensors

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The article presents a method of vibrating screen trajectory control based on MR (magnetorheological) dampers applied in a screen suspension. A mathematical description of the dynamic screen model was derived, and parameters of this model were estimated based on experimental data from a semi-industrial vibrating screen. The investigated screen included a single mechanical exciter with unbalanced masses, generating a circular vibration trajectory and operating with over-resonant frequency close to 19 Hz. It was experimentally tested in several phases of operation: start-up, nominal operation at a target vibration frequency and shutdown. The implemented screen model was further extended and included several MR dampers oriented horizontally and vertically in the form of Bouc–Wen models. The Bouc–Wen model was identified based on experiments carried out for an MR damper subjected to harmonic excitations generated by the MTS (material testing system). Dominant frequencies of excitation varied by up to 20 Hz during experiments. The main novelty of the reported solution is that according to the proposed control algorithm, the desired forces generated by MR dampers emulate an additional virtual mechanical exciter of the vibrating screen. In turn, it interacts with the available exciter, resulting in conversion of the trajectory from circular to linear, which was validated in the presented study. For the purpose of simulation accuracy, the desired control force was additionally limited within the simulator by MR damper dissipative domain, which maps the constraints of a semi-active damper. The presented approach allows one to obtain a close to linear trajectory with only one exciter and with semi-active control of suspension stiffness. The results were successfully repeated with different configurations of desired trajectory, indicating that the effectiveness of the desired linear trajectory generation depends on its orientation. The reported findings may lead to the design of new vibrating screen constructions, taking advantage of the semi-active control of a suspension in the attenuation of disturbance resulting from varying processed material parameters.

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Section: Simulation Results Of Passive Suspensionmentioning

confidence: 88%

Section: Introductionmentioning

confidence: 99%

Trajectory Control for Vibrating Screen with Magnetorheological Dampers

Ogonowski

Krauze

2022

Sensors

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“…A kind of pneumatic near-zero frequency vibration isolator composed of bellows structure, pressurized gas and incompressible liquid has the characteristics of high static and low dynamic stiffness, which can well meet the practical needs of low-frequency vibration isolation of heavy machines 15 . Compared with the metal spring isolator, the peak vibration amplitude of the new vibration isolator based on magnetorheological damper is reduced by 64%, which effectively prolongs the service life of the vibrating screen 16 . A new type of electromagnetic shunt damper simulates four different types of dampers by changing the external circuit so that the best isolation performance can be achieved in different frequency bands 17 .…”

Section: Introductionmentioning

confidence: 99%

Parameter optimization of vibration control system for adjacent building structures based on negative stiffness inerter damper

Kang,

Tang,

Wei

et al. 2024

Sci Rep

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Building structures are subjected to strong earthquakes, which result in lateral collisions between them. Such collisions often cause severe structural damage and exacerbate the seismic hazard risk of building structures during earthquake events. This paper discusses the application of vibration control devices based on negative stiffness inerter damper in single-story adjacent building structures. The dynamic equations of the vibration control system containing different types of negative stiffness inerter damper under seismic excitation are established as a unified model. The H2 norm theory and Monte Carlo pattern search method are used to optimize the design parameters to improve the vibration control performance of the system, and the dynamic characteristics of the system are investigated. The results demonstrate that attaching negative stiffness inerter damper to adjacent building structures can effectively improve the overall seismic capacity reserve of the building and reduce the risk of collision of adjacent building structures; improve the robustness and stability of the system, and better reduce the displacement response of the building structure under seismic excitation. In addition, the potential of NSID-based vibration control devices to convert seismic energy into usable electricity has been investigated.

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“…With the development of China 's industrialization level, the mining vibrating screen is also developing towards standardization and generalization. Wu Mingzhuang et al [4], designed a new type of vibration isolator based on magnetorheological dampers, aiming to improve the vibration isolation performance of vibrating screens. Tongcheng Sun et al [5], analyzed the screen model to evaluate the natural frequencies and mode shapes of the screen.In the normal working process of the vibrating screen, the vibrating screen is subjected to a variety of forces such as the excitation force generated by the exciter, the impact force of the material, and the inertial force.…”

Section: Introductionmentioning

confidence: 99%

Mining Vibrating Screen Modal Analysis

Zhu,

Wu,

Yang

et al. 2024

Advances in Transdisciplinary Engineering

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Coal is the main source of energy in China, and coal washing and processing can reduce the impurities in coal, which is particularly important for environmental protection and efficient utilization of coal. Mining vibrating screen in the coal selection process plays an important role, due to the harsh working environment of the coal plant, the work intensity is large, making the mining vibrating screen is very easy to fail, resulting in huge economic losses, which can cause serious injuries. Therefore, the monitoring and diagnosis of mining vibrating screen failure research is of great significance. In this paper, the mining vibrating screen SOLIDWORKS three-dimensional modeling, the use of ANSYS software for modal analysis, through the modal analysis, the mining vibrating screen to get the first 12 orders of modes, to determine the mining vibrating screen in the first 12 orders of modal vibration under the intrinsic frequency and intrinsic vibration pattern, for the mining vibrating screen research provides an important basis.

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A novel vibration isolator for vibrating screen based on magnetorheological damper

Cited by 9 publications

References 17 publications

Trajectory Control for Vibrating Screen with Magnetorheological Dampers

Trajectory Control for Vibrating Screen with Magnetorheological Dampers

Parameter optimization of vibration control system for adjacent building structures based on negative stiffness inerter damper

Mining Vibrating Screen Modal Analysis

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