Fault Detection for the Scraper Chain Based on Vibration Analysis Using the Adaptive Optimal Kernel Time‐Frequency Representation

Zhang, Xing; Li, Wenyuan; Zhu, Zhencai; Yang, Shanguo; Jiang, Fan

doi:10.1155/2019/6986240

Cited by 10 publications

(6 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Some experts and scholars have done a lot of work on flexible body dynamics, bending, finite element simulation and so on, which provide a theoretical basis for this study, such as references [11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Analysis of longitudinal and torsional vibration of mining scraper conveyor under the over bending section working condition

Xie¹,

Liu²,

Xie³

2023

J. vibroeng.

View full text Add to dashboard Cite

Considering that the scraper will produce longitudinal and torsional pendulum vibration when passing through the bending section, and have a great influence on the motion characteristics of the scraper conveyor, this paper studies the longitudinal and torsional pendulum coupling vibration characteristics of the scraper conveyor under the working condition of over-bending section for the first time. Firstly, the simplified model of torsional pendulum vibration of scraper chain system is established based on Voigt model and point-by-point tension method. Then, the change law of scraper group vibration and chain tension under the condition of scraper bending is studied. Thirdly, through the influence area and attenuation characteristics of torsional pendulum vibration, the thumbnail model of torsional pendulum vibration is constructed. Finally, the longitudinal and torsional pendulum coupling vibration dynamic model of the scraper chain system is constructed based on the torsional pendulum vibration abbreviation model, and the overall longitudinal and torsional pendulum vibration characteristics of the scraper conveyor are studied when the scraper is over the bending section. The conclusion of this paper provides a theoretical basis for better understanding the operation characteristics of scraper conveyor in coal mine.

show abstract

Section: Introductionmentioning

confidence: 99%

Analysis of longitudinal and torsional vibration of mining scraper conveyor under the over bending section working condition

Xie¹,

Liu²,

Xie³

2023

J. vibroeng.

View full text Add to dashboard Cite

show abstract

“…The crack initiation properties of the chain ring under the action of time-varying load were studied, and a prediction model of the crack initiation life was established using the multiaxial fatigue strength theory. Zhang et al [21] proposed a novel strategy for the fault detection of scraper chains based on a vibration analysis of the chute. Zhao et al [22] proposed a local gear fault diagnosis method based on a bispectral analysis of signal envelopes obtained from stator current processing under time-varying load.…”

Section: Introductionmentioning

confidence: 99%

Dynamic Properties of Chain Drive in a Scraper Conveyor under Various Working Conditions

et al. 2022

View full text Add to dashboard Cite

A scraper conveyor is important in coal mining. During operation, its working performance is affected by chain speed fluctuations, terrain fluctuations, and load changes. Thus, evaluating the influence of these factors on the dynamic properties of a scraper conveyor is important. This study first built a dynamic property test bench. Then, the vibration signals of the reducer output shaft were measured under various chain speed, terrain, and load conditions. Finally, the dynamic properties of a scraper conveyor were evaluated by conducting a frequency domain analysis of the measured vibration signals. The results show that the output shaft of the motor, the second shaft, and the second-stage meshing gear of the reducer are sensitive to external factors. Under the terrain conditions of “horizontal + vertical” bending, the middle chute was the most sensitive to the meshing frequency of the sprocket chain. This type of condition had a significant influence on the scraping phenomenon of the scraper and the middle chute. Under various load conditions, the amplitude of each shaft of the reducer decreased, especially the amplitude of the motor output shaft, but the scraping amplitude of the scraper and middle chute greatly increased. This study is of great significance for improving the dynamic properties and structural optimization of scraper conveyors.

show abstract

“…For signals in the time or frequency domain, several signal processing techniques have been proposed for the extraction of features from the acceleration responses. These include short-term Fourier transform [ 42 ], wavelet transform [ 11 ], singular value decomposition [ 43 ], kernel time-frequency representation [ 44 ] and more. Each one has its own merits and demerits.…”

Section: Introductionmentioning

confidence: 99%

Indirect Monitoring of Frequencies of a Multiple Span Bridge Using Data Collected from an Instrumented Train: A Field Case Study

Malekjafarian

Khan

O’Brien

et al. 2022

Sensors

View full text Add to dashboard Cite

In this paper, a field study is carried out to monitor the natural frequencies of Malahide viaduct bridge which is located in the north of Dublin. The bridge includes a series of simply supported spans, two of which collapsed in 2009 and were replaced. The replaced spans are stiffer than most of the others and these differences resulted in higher natural frequencies. An indirect bridge monitoring approach is employed in which acceleration responses from an instrumented train are used to estimate the natural frequencies of each span of the viaduct showing the locations of the two replaced spans with higher stiffness. For the indirect approach, an Ensemble Empirical Mode Decomposition (EEMD)-based Hilbert Huang Transform (HHT) technique is employed to identify the natural frequency of each span. This is carried out by analysing the Instantaneous Frequencies (IFs) from the calculated intrinsic mode functions. The average of the IFs calculated using 41 runs of the instrumented train (with varying carriage mass and speed for each run) are used to estimate the natural frequencies. To assess the feasibility of the indirect approach, a bespoke set of direct measurements was taken using accelerometers attached successively on each span of the viaduct. The free and forced vibrations from each span are used to estimate the first natural frequencies. The frequencies obtained from drive-by measurements are compared to those from direct measurements which confirms the effectiveness of indirect approaches. In addition, the instantaneous amplitudes of the drive-by signals are used to indicate the location of the stiffer spans. Finally, the accuracy and robustness of the indirect approaches for monitoring of multi span bridges are discussed.

show abstract

Fault Detection for the Scraper Chain Based on Vibration Analysis Using the Adaptive Optimal Kernel Time‐Frequency Representation

Cited by 10 publications

References 18 publications

Analysis of longitudinal and torsional vibration of mining scraper conveyor under the over bending section working condition

Analysis of longitudinal and torsional vibration of mining scraper conveyor under the over bending section working condition

Dynamic Properties of Chain Drive in a Scraper Conveyor under Various Working Conditions

Indirect Monitoring of Frequencies of a Multiple Span Bridge Using Data Collected from an Instrumented Train: A Field Case Study

Contact Info

Product

Resources

About