Mesh sieve sizes in multi-deck screens were performedĪrtykuł jest pierwszą częścią opracowania przedstawiającego krok po kroku sposób układania i obliczania operacji technologicznych, omawiając jednocześnie pewne aspekty technologiczne i ekonomiczne zastosowania oferowanych na rynku maszyn. At theĮxample of typical aggregates production system the calculations of the screening effect by changing The quality factor is defined as a dimensionless function of content of undersize, oversize and main fraction in the screening product. Of quantity, price and quality screening factor were proposed. Optimality criterion process measured by value of production as a function Na przykładzie typowego układu produkcji kruszyw wykonano obliczenia efektu przesiewania przy zmieniających się wielkościach oczek sit przesiewaczy wielopokładowych.Ī concept of optimizing the aggregates screening process in multi-product screening systems haveīeen presented in this paper. Współczynnik jakości określono jako bezwymiarową funkcję zawartości podziarna, nadziarna i frakcji podstawowej w produkcie przesiewania. Zaproponowano kryte-rium optymalności procesu mierzonej wartością produkcji jako funkcję ilości, ceny i współczynnika jakości produktów przesiewania. ![]() Przedstawiono zagadnienie optymalizacji procesu przesiewania w wieloproduktowych układach przesiewających stosowanych powszechnie w instalacjach produkcji kruszyw. Its use allows the realization of complex trajectories of motion that are more technologically efficient for variable parameters of the treated media and energy saving in sieving screens and other vibrating machines. The finite element model is used for checking the strength capacity of the most loaded units of a dual-frequency drive. The spectral composition of the exciting force up to 200 Hz contains higher harmonics, the energy share of which is 25.4% from the 2nd harmonic and 14.1% from the 3rd and higher harmonics that correspondingly improves bulk material treatment in comparison to single-frequency vibrators. Because of this, the sym-metry axis of the resulting vector hodograph can be changed. This approach allows for a generation of the excitation force with variable amplitude and frequency, which changes depending on the inertial characteristics and shaft rotation frequency and does not relate to the phase difference of the unbalanced masses. This drive consists of one motor and two coaxial unbalanced masses, whose rotational frequencies are related in the ratio 2:1. The low energy efficiency and excessive power of electric motors of large-scale vibrating machines for processing bulk materials motivated a new design of the inertial drive. The simulation is based on a model of efficiency screening depended on the geometric and dynamic parameters of a screen and the load and composition of feed. The total result of the process was evaluated by product quality indicator. Simulation of the process performed gave the answer how the screened material is distributed by the mass and grain size as well as how the screening efficiency is distributed depend on feed load and size distribution or parameters of the screens. Each deck of the screen is assumed as the system of 6 subsequent screens of the equal length and different size aperture. The screening efficiency of the process along the surface of three-deck screen device is analyzed. The paper presents results of digital experiments performed on two 3-deck screens. Controlling parameter of the screening process is the screen aperture. Digital simulation is the effective method to get a knowledge on the screening efficiency of the complex multi-deck separation system and reliable tool for optimizing the process.
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