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Wyświetlanie 1-2 z 2
Tytuł:
Impact of the Winding Angle of the Auger Blade on the Loading Process With Milling Auger Drums
Autorzy:
Wydro, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/2064322.pdf
Data publikacji:
2020
Wydawca:
STE GROUP
Tematy:
longwall shearer
spoil loading
cutting drums
laboratory tests
kombajn ścianowy
ładowanie urobku
testy laboratoryjne
bęben tnący
Opis:
This publication addresses the impact of selected design parameters of milling auger cutting drums on the loading process, and above all the winding angle of the auger blade. The loading process is often referred to as an auxiliary process because the milling process is considered to be the dominant throughout the work of the cutting drum. The correct determination of the relationship between the mining process and the loading process allows to understand how the individual design and kinematic parameters of the mining drums and the mining machine on which they are installed affect each other. The publication discusses the problem of loading with milling cutting drums and ways to increase its efficiency. The research results of the loading process have been presented, affecting the efficiency of this process in the aspect of various angles of inclination of the auger blades. Based on the tests, conclusions have been formulated that allow for the possible selection of an appropriate winding angle for the auger blade, depending on the granulation of spoil.
Źródło:
New Trends in Production Engineering; 2020, 3, 1; 241--250
2545-2843
Pojawia się w:
New Trends in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Cutting Resistance of Rock Salt in Function of Temperature
Autorzy:
Kotwica, Krzysztof
Stopka, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/2064339.pdf
Data publikacji:
2020
Wydawca:
STE GROUP
Tematy:
rock salt
cuttability index
workability
laboratory tests
temperature change of salt
sól kamienna
urabialność
testy laboratoryjne
wskaźnik skrawalności
Opis:
Currently over then 16 percent of the total worldwide salt production is excavated in underground mines. Salt deposits often lie at great depths up to 1000 m, where the temperature of the surrounding rocks reaches 50°C and even exceeds it. A large part of it is exploited using mechanical methods, mainly with the use of road headers and continuous miners. When excavating salt rock, the cutters of the road header mining head come into contact with the rock. This generate friction and in consequence a rise in temperature. In AGH University of Science and Technology the laboratory tests were carried out to determine the effect of temperature on cutting resistance and selected mechanical properties of rock salt. On the special laboratory test stand the rock salt sample was cutted at three different temperatures - 20, 50 and 80°C. The cuttability index and the side chipping angle were measured for each temperature. Additionally the same tests were performed in the case of salt sample after cooling to room temperature. The selected mechanical parameters of rock salt - compressive, tensile and shear strength were also measured for the same temperature values. The obtained results were compared and described in the paper.
Źródło:
New Trends in Production Engineering; 2020, 3, 1; 211--220
2545-2843
Pojawia się w:
New Trends in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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