Zobrazeno 1 - 10
of 35
pro vyhledávání: '"Jiří Fries"'
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-23 (2024)
Abstract This article presents a proposal for a new solution of tangential-rotary picks intended for mining, especially hard rocks with roadheaders. The design of these picks is characterized by many innovative solutions aimed at significantly increa
Externí odkaz:
https://doaj.org/article/f7e5dadd595d4bd8a3a1bd02f697e90c
Publikováno v:
Sensors, Vol 24, Iss 8, p 2588 (2024)
In mining machines with friction discs, but also in multi-rope traction elevators, it is necessary to distribute the applied tensile load, generated by the weight of the cage and counterweight, evenly in all cross-sections of the load-bearing ropes.
Externí odkaz:
https://doaj.org/article/d702fd024a1747009af75428a9425b78
Publikováno v:
Machines, Vol 11, Iss 5, p 544 (2023)
The paper presents the measured values of tensile forces acting on transmission idlers in the upper and lower run of a conveyor belt placed on a laboratory machine designed at the Department of Machine and Industrial Design, Faculty of Mechanical Eng
Externí odkaz:
https://doaj.org/article/10960cd011364f499e2815de5710efff
Publikováno v:
Sensors, Vol 23, Iss 6, p 3137 (2023)
This paper presents a laboratory device simulating a section of a conveyor belt on which a diagonal plough is installed. Experimental measurements were carried out in a laboratory belonging to the Department of Machine and Industrial Design at the VS
Externí odkaz:
https://doaj.org/article/e6b88d44a2ea49919a51e0286aa84b5b
Publikováno v:
Advances in Sciences and Technology, Vol 14, Iss 4, Pp 58-67 (2020)
The paper deals with the problem of water separation from a mixture of wet loose material using a worm, or auger, dewaterer, whose working element is a full auger with variable thread pitch, rotating in a fixed trough. The extrusion of water from the
Externí odkaz:
https://doaj.org/article/9146b262992147e8b029e521f2ba00c1
Autor:
Rastislav Bernát, Jozef Žarnovský, Ivan Kováč, Rastislav Mikuš, Jiří Fries, Radoslav Csintalan
Publikováno v:
Materials, Vol 15, Iss 1, p 158 (2021)
The present paper analyzes the damage of surfaces at spots of frictional contact, namely, the friction nodes on a camshaft and the connecting rod pins of a crankshaft. The resulting wear of the monitored friction nodes reduces the technical life of t
Externí odkaz:
https://doaj.org/article/05bdc8b661a24661a0e7b6beee2a190d
Autor:
Leopold Hrabovský, Jiří Fries
Publikováno v:
Energies, Vol 14, Iss 23, p 7984 (2021)
The paper presents a methodology for determining the volume of a batch of conveyed material located before a transverse partition of a certain height and the distance over which the batch of material extends on the working surface of the conveyor bel
Externí odkaz:
https://doaj.org/article/f2607160f3cc4701b79b95be04f10bc1
Autor:
Karel Frydrýšek, Šárka Michenková, Leopold Pleva, Jan Koutecký, Jiří Fries, Kateřina Peterek Dědková, Roman Madeja, Antonín Trefil, Pavel Krpec, Tomáš Halo, Leopold Hrabovský, Lubor Bialy, Roland Jančo, Jiří Pokorný
Publikováno v:
Applied Sciences, Vol 11, Iss 12, p 5616 (2021)
This article deals with a new original analytical solution of deformation, force and stress states in wood screw joints up to the limit values of pulling out/breaking the screw. The screws are under tension. The wood-to-screw interaction is effective
Externí odkaz:
https://doaj.org/article/3b94cfef26c2496eab4aea6e1263d18b
Autor:
Katerina Mouralova, Libor Benes, Radim Zahradnicek, Josef Bednar, Antonin Zadera, Jiří Fries, Vaclav Kana
Publikováno v:
Materials, Vol 13, Iss 21, p 4823 (2020)
Unconventional wire electrical discharge machining technology (WEDM) is a key machining process, especially for machining newly emerging materials, as there are almost no restrictions (only at least minimal electrical conductivity) in terms of demand
Externí odkaz:
https://doaj.org/article/66e75aba481d4973bc653c9c0b462861
Publikováno v:
Transactions of the VŠB-Technical University of Ostrava, Mechanical Series, Vol 57, Iss 1, Pp 65-70 (2011)
Bucket wheel loading at the present time (torsional moment on wheel shaft, peripheral cutting force) is determined from electromotor incoming power or reaction force measured on gearbox hinge. Both methods together are weighted by steel construction
Externí odkaz:
https://doaj.org/article/1fb14c55b685414da920b437f3ca3501