Przesiewacze obrotowe o zmiennych średnicach sit do segregacji kruszyw

Modrzewski, R.; Ławińska, Katarzyna; Wodziński, P.

doi:10.15199/62.2017.10.26

Cited by 2 publications

(2 citation statements)

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“…The fundamental operation in material enrichment processes is the screening process. This process enhances the material's utility, allowing for the attainment of a uniform grain composition [1][2][3]. In most industrial sectors, screens are used for this purpose.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Vibrating Screen Startup Time on Vibration Amplitude and Energy Consumption in Transient State

Feliks,

Tomach

2023

Energies

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The article presents the results of research on the trajectory and amplitude values during the startup of a vibrating screen, depending on the set startup time. The research was conducted using a suspended vibrating screen with a segmental vibration trajectory, where vibration excitation was achieved through two vibratory motors directly attached to the screen frame. The vibratory motors were powered with three-phase voltage and connected to the grid through frequency converters, allowing for current control in steady-state and startup conditions. The analysis focused on the vibration trajectory and the resulting amplitude values for nine selected startup times (ranging from 0 s to 8 s). Two measurement methods were employed: using piezoelectric acceleration sensors and optical recording. Additionally, the momentary power consumption by the screen drive was recorded, and the maximum current flowing in the power supply circuit was determined. These studies enabled the determination of the most favourable startup parameters that reduce the power demand of the drive without significantly affecting the kinematic parameters of the screen during its startup. The results of experimental research presented in the article regarding the startup time of the screening machine and its influence on vibration parameters have shown that the startup time significantly impacts the amplitude values that occur during startup. In the analysed case, the most favourable startup time was 3 s. Power consumption studies during startup revealed that startup time has a notable influence on momentary power consumption. The conducted research demonstrated that for startup times below 0.2 s, the maximum momentary power was the highest (reaching 5 kW, with a current consumption of 4.5 times the rated current). Regarding energy efficiency, the most favourable startup times exceed 2.0 s. Extending these startup times can significantly reduce the power demand of the drive, even up to threefold, thereby enabling the selection of motors with much lower power ratings.

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Section: Introductionmentioning

confidence: 99%

The Impact of Vibrating Screen Startup Time on Vibration Amplitude and Energy Consumption in Transient State

Feliks,

Tomach

2023

Energies

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“…This process increases the utility value of the material [2] and thus allows obtaining a homogeneous particle size distribution. Screening is used, among other things, for the control of crushing and grinding processes [3][4][5], waste recycling [6] or for the preparation of aggregate mixtures [7,8]. Screeners are used in stationary plants and mobile crushing or screening sets [9].…”

Section: Introductionmentioning

confidence: 99%

Research on the New Drive of a Laboratory Screen with Rectilinear Vibrations in Transient States

et al. 2021

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The paper presents the results of research on the vibrating motion of a laboratory screen with a rectilinear (segmental) trajectory of vibrations during its start-up and braking. The investigations were carried out on a modernized stand equipped with a system of two vibrating motors applied in newer solutions of industrial screens, which are mounted directly on the riddle. The tests were carried out for three different frequencies using three-axis acceleration sensors. The analysed parameter was the increase in the amplitude of vibrations in transient states compared to the amplitude during the stable operation of the device. The maximum multiplication of the vibration amplitude of the classic drive system during start-up was 9.7 (mm/mm) in the vertical direction and 5.7 (mm/mm) for the new system. During braking, the maximum multiplication of the vibration amplitude of the classic drive system was 6.9 (mm/mm) vertically, while for the drive system with vibration motors, it was 11.4 (mm/mm). The absence of flexible couplings in the drive system reduces the damping of vibrations and increases the value of amplitude during the start-up and free braking of the machine. This does not have a major influence on the correct operation of the machine in a steady state. However, the use of the new drive system resulted in a significant reduction in power demand and shortened the start-up time, which has a positive effect on the operating costs of the machine.

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Przesiewacze obrotowe o zmiennych średnicach sit do segregacji kruszyw

Cited by 2 publications

References 0 publications

The Impact of Vibrating Screen Startup Time on Vibration Amplitude and Energy Consumption in Transient State

The Impact of Vibrating Screen Startup Time on Vibration Amplitude and Energy Consumption in Transient State

Research on the New Drive of a Laboratory Screen with Rectilinear Vibrations in Transient States

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