Kinematics characteristics of the flip-flow screen with a crankshaft-link structure and screening analysis for moist coal

Li, Hong‐Xi; Liu, Chusheng; Shen, Ling; Zhao, Liang; Li, Sai

doi:10.1016/j.powtec.2021.08.042

Cited by 28 publications

(12 citation statements)

References 29 publications

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“…To address these issues, flip-flow vibrating screens (FFVSs) have emerged as innovative screening equipment, combining features of the crank-link-type flip-flow screen and the traditional vibrating screen [11,12]. These FFVSs not only inherit the high ejection intensity and self-cleaning ability of the crank-link-type flip-flow screens but also incorporate the simplicity and high reliability associated with traditional linear and circular vibration screens [13,14]. Consequently, FFVSs effectively tackle the challenges posed by the dry deep-screening of wet, fine, lowgrade bituminous coal, thereby facilitating advancements in the thermal coal preparation process.…”

Section: Introductionmentioning

confidence: 99%

Effect of Screen-Panel Tensile Length and Material Characteristics on Screening Performance of Flip-Flow Vibrating Screens for Dry-Screening Fine, Low-Grade Bituminous Coal

Lin,

Zhang,

et al. 2024

Minerals

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Flip-flow vibrating screens (FFVSs) effectively tackle the challenges posed by the dry deep-screening of wet, fine, low-grade bituminous coal, thereby facilitating advancements in the thermal coal preparation process. The tensile lengths of the screen panels not only influence the service lives of the screen panels but also play a pivotal role in determining the screening performance of the FFVSs. To investigate the effect of the screen-panel tensile length on the screening performance of an FFVS, this study constructs a dual-mass flip-flow screening test rig. The experimental results reveal that when the fine-particle content and the external water content in the feed of low-grade bituminous coal are 55% and 16%, respectively, the most favorable tensile length of the screen panels is 2 mm. With a fine-particle content of 55% in the feed of low-grade bituminous coal and an increase in the external water content from 4% to 20%, the screening efficiency of the FFVS initially decreases and then increases. Notably, low-grade bituminous coal with 16% external water content poses the most challenging screening conditions. Furthermore, when the external water content of the low-grade bituminous coal is 16% and the fine-particle content in the feed increases from 25% to 55%, the screening efficiency of the FFVS gradually improves.

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Section: Introductionmentioning

confidence: 99%

Effect of Screen-Panel Tensile Length and Material Characteristics on Screening Performance of Flip-Flow Vibrating Screens for Dry-Screening Fine, Low-Grade Bituminous Coal

Lin,

Zhang,

et al. 2024

Minerals

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show abstract

“…A flip-flow screen with crankshaft-link structure (FFSCLS) proposed by Li has excellent performance for moist coal screening. 17 Improvement for design of beam structures in large vibrating screen considering bending and random vibration is studied by Peng and Liu, 18 which aims to conduct a systematic mechanics analysis of the beam structures and improve the design method. To solve the problem of damage due to large dynamic stress of the lateral plates during working process of the vibration screen, the natural modes and distribution of dynamic stress of lateral plates are calculated and analyzed, and the lateral plate structure is optimized by means of the improved genetic algorithm.…”

Section: Introductionmentioning

confidence: 99%

Study on the dynamics characteristics and screening performance of the disc spring vibration screen

Zhou

Zhang

Cao

et al. 2023

Journal of Low Frequency Noise, Vibration and Active Control

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The disc spring system is applied to the vibration screen, which can effectively reduce the exciting force and improve screening capacity. 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 direction at first natural frequency is consistent with the working direction of the vibration screen. Moreover, the trajectory analysis and discrete element screening simulation prove that the disc spring vibration screen has better screening performance than the coil spring vibration screen. Eventually, by comparing required exciting force under the same amplitude, fatigue life of the spindle bearing, and energy consumption between the coil spring and disc spring vibration screen, it can be found that disc spring vibration screen has better mechanical properties, higher reliability, and lower energy consumption.

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“…However, wet coal preparation requires a large amount of water, which is not possible in arid areas. In addition, the moisture content of the nal product of wet coal preparation is very high (up to 12%), making storage and transportation very di cult [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Dynamics Analysis and Experiment of Novel Compound Dry Separator

Zhou

Zhang

et al. 2022

Shock and Vibration

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China is the world’s largest producer and consumer of coal. The method of dry coal beneficiation is a key method of separation technology in the field of coal mining. In this paper, the structure of a novel compound dry separator (NCDS) was revealed. The dynamic characteristics and vibration behavior of the NCDS were studied through theoretical modeling, simulation research, and experimental test methods. The mathematical model and simulation model based on ADAMS of the NCDS were established. The experiment for the NCDS was carried out using the dynamics characteristic testing system. The dynamic curve and spatial trajectory of the NCDS were obtained. The Lissajous figure of displacement indicated that the space motion trajectory of the NCDS was an oblique line. The dynamic characteristics of the NCDS with different rotational speeds were revealed. The effect of eccentricity on the dynamic characteristics of the NCDS was discussed, and the vibration amplitudes increased with the increase of eccentricity. The results showed that the deviation of the simulation data and theoretical data was within 3.75%, and the result of the experiment data and theoretical data was within 6.98%. Through comparison and verification, the theoretical model with high accuracy can accurately calculate the dynamic characteristics of the NCDS before processing and manufacturing. This paper provides a reference for the design and efficient operation of the new compound dry separation machine.

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Kinematics characteristics of the flip-flow screen with a crankshaft-link structure and screening analysis for moist coal

Cited by 28 publications

References 29 publications

Effect of Screen-Panel Tensile Length and Material Characteristics on Screening Performance of Flip-Flow Vibrating Screens for Dry-Screening Fine, Low-Grade Bituminous Coal

Effect of Screen-Panel Tensile Length and Material Characteristics on Screening Performance of Flip-Flow Vibrating Screens for Dry-Screening Fine, Low-Grade Bituminous Coal

Study on the dynamics characteristics and screening performance of the disc spring vibration screen

Dynamics Analysis and Experiment of Novel Compound Dry Separator

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