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1
Content available remote Zastosowanie i znaczenie sprzęgieł mechanicznych podatnych skrętnie w układach napędowych maszyn przemysłowych
100%
Opasiak T.
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tom Nr 2
69--72
PL
Jednym z podstawowych czynników decydujących o prawidłowej pracy maszyny przemysłowej jest prawidłowa praca jej układu napędowego.
2
Content available remote Sprzęgła mechaniczne podatne skrętnie stosowane w układach napędowych
100%
Opasiak T.
Utrzymanie Ruchu
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2021
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tom Nr 2
30--35
PL
Sprzęgła mechaniczne podatne skrętnie są szeroko stosowane w układach napędowych maszyn przemysłowych. W artykule przedstawiono budowę i parametry eksploatacyjne typowych sprzęgieł podatnych skrętnie.
3
Content available remote Pasy napędowe w układach napędowych maszyn roboczych
100%
Opasiak T.
Utrzymanie Ruchu
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2021
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tom Nr 4
24--30
PL
Pasy napędowe są podstawowym elementem przekładni pasowych, które stanowią podgrupę przekładni cięgnowych. Przekładnie cierne należą do grupy przekładni mechanicznych (rys. 1).
4
Content available Mining machines elements packing and securing on platform container
63%
Cieśla M. , Opasiak T.
Zeszyty Naukowe. Transport / Politechnika Śląska
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2021
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tom z. 110
5--21
EN
The scientific purpose of this paper was to analyse the problem related to intermodal transportation of mining components packed in containers or other cargo transport units coupled with the problem of its proper securing. In this article, the issue of exposing the load to the effects of inertia forces which might cause unintentional movement is presented. The methods of securing the heavy load in cargo transport units are reviewed in the context of cargo immobilisation possibilities while reducing the load sensitivity to mechanical forces. The research part of this article presents the methods of packing and securing an atypical load, which is a part of a mining machine weighing 18t. This paper presents the results of calculations of inertia forces acting on the transported cargo, packed on a container platform. Based on the results, the cross fixing method was selected to secure the cargo and further decisions were made on the type and quantity of conveyor lashings necessary for the safe and correct carriage of the atypical load.
5
Content available Opportunities to improve the efficiency of the “Gwarek 1200” belt conveyor
51%
Peruń G. , Łazarz B. , Opasiak T.
Transport Problems
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2020
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tom T. 15, z. 4, cz. 2
215--226
EN
The article presents the results of research of the Gwarek 1200 belt conveyor. The work aimed to determine the possible benefits of changing the type of rollers used. It was expected that the change of the rollers from N-type to C-type will reduce the costs of energy consumed by the conveyor drive system. This part of the research was carried out in a hard coalmine at the level of 665 m. The test was given the entire power unit in terms of the starting power demand and rated power in real time. Measurement works were carried out before and after the modernization of the conveyor for 5 years. Moreover, it was decided to extend the research to include vibroacoustic tests, aimed at determining the technical condition by measuring vibrations. It is expected that based on the analysis of vibration signals in the long term will allow to develop a method for diagnosing belt conveyor rollers and to quickly detect their malfunction under normal operating conditions.
6
Content available Numerical investigations on the dynamic behaviour of a 2-DOF airfoil with application in energy harvesting system
51%
Haniszewski T. , Gąska D. , Margielewicz J. , Opasiak T.
Zeszyty Naukowe. Transport / Politechnika Śląska
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2023
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tom z. 118
77--91
EN
This article presents the basic airfoil model with two degrees of freedom - the semi-rigid model, where its forced vibrations were considered, and the exciting force is the aerodynamic force, including its periodic changes, that is, gusts. Since the phenomenological model under study has a coupled form, its versions after decoupling are presented, which has an impact on the results of the final research. The airfoil model presented in this way was shown from the application side in the system of a simple energy harvester based on a deformable beam with piezoelectric elements. The result of the simulation tests is a preliminary analysis of the possibility of using the airfoil as a vibration generator for the energy harvesting system. Along with the application of the mechanical part, a numerical simulation of the electrical part was also implemented, related to the transformation of the voltage generated by piezoelectric elements into a constant voltage signal with a connected receiver with power consumption similar to the Atmega microcontroller with battery charging.
7
Content available Influence of changes in the working temperature of flexible couplings on their stiffness characteristics
51%
Opasiak T. , Margielewicz J. , Gąska D. , Haniszewski T.
Transport Problems
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2022
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tom T. 17, z. 4
177--186
EN
This article compares flexible couplings of the spider-type insert, and the tiretype insert. The influences of the volume and hardness of the elastomeric connector on the characteristics of this type of coupling, as well as the course of the change of the stiffness coefficient as a result of changes in the operating temperature, are presented. In drive systems, flexible couplings undergo very frequent changes within a wide range of operating temperatures, which causes a change in the dynamic parameters of the flexible couplings during operation.
8
Content available Rollers for belt conveyors in terms of rotation resistance and energy efficiency
51%
Opasiak T. , Margielewicz J. , Gąska D. , Haniszewski T.
Transport Problems
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2022
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tom T. 17, z. 2
57--68
EN
The paper shows the results of researching the rollers used in belt conveyors working in a hard coal mine. Rollers should be characterized by low rotation resistance, which results in low power consumption of the propulsion unit. The tests conducted aimed to assess the technical condition of the new C-type rollers after several years of operation in a hard coal mine. The research was carried out from the new approach to the standard issues of roll testing and verification in a hard coal mine. Laboratory tests were combined with testing the entire belt conveyor in terms of power demand. The research was carried out for 3 years and it was monitored how the dynamic resistance of the working rollers changed and how this translates into the power demand consumed by the belt conveyor in a hard coal mine. The aim of the research was a new approach to the research of rollers used in conveyors operating in a mine.
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