Temat: jib - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Optimizacja dinamicheskogo rezhima povorota strelovogo krana
Optimizing the dynamic modes of slewing jib crane
Autorzy:: Loveykin, V.
Melnichenko, V.
Powiązania:: https://bibliotekanauki.pl/articles/77156.pdf
Data publikacji:: 2013
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Tematy:: jib
crane
dynamic model
braking
torque moment
control parameter
mathematical model
Opis:: Применен способ уменьшения колебаний груза на гибком подвесе при работе механизма поворота стрелового крана во время переходных процессов путем оптимизации режимов пуска и торможения приводного механизма по динамическому критерию, представляющего собой среднее зна чение динамической составляющей мощно сти привода за время движения.
The method of cargo oscillation reduction, during the lifting machines operation, has been considered in the article. The start-up mode of the crane swinging mechanism optimization has been carried out by means of variational calculation. The criterion which is the average value of the dynamic component of the drive power of the move. has been used. And this criterion has been subject to minimization. The torque moment of the driving mechanism, acting towards the crane swinging mechanism, has been selected as a control parameter.
Źródło:: Motrol. Motoryzacja i Energetyka Rolnictwa; 2013, 15, 3
1730-8658
Pojawia się w:: Motrol. Motoryzacja i Energetyka Rolnictwa
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Structural design of a boom mounting of a mast type jib crane for handling sludge pumps
Autorzy:: Molnár, Denis
Blatnický, Miroslav
Dižo, Ján
Ishchuk, Vadym
Powiązania:: https://bibliotekanauki.pl/articles/2201651.pdf
Data publikacji:: 2022
Wydawca:: Politechnika Koszalińska. Wydawnictwo Uczelniane
Tematy:: mast type jib crane
handling
structural design
functional calculation
load capacity
żuraw przemysłowy
dźwig
obsługa
projekt konstrukcyjny
udźwig
Opis:: The paper is a continuation of the issue of the technical solution of a mast type jib crane for handling sludge pumps. It serves for the use in Building no. 900, Block V2, of the nuclear power plant Jaslovské Bohunice. It is an optimization of the original, in-service damaged handling device with manual control of lift and rotation. The overloading of the device has an insignificant effect on the lifting force on a crank handle. It was found that the lifting force permanently falls within the recommended range of 120 to 160 N for convenient operation by a single worker. Inasmuch as there is a complete absence of bearings in the slewing gear in the original design, it is the solution to this issue that is the subject of the paper. The problem of pulling out the sludge pumps, which was established in the course of using the jib crane, ingeniously provided the opportunities to further design changes on the original design. The solution offered was to scrap the original design of the carrier inserted into the support and replace it with a fixed mast on which the boom would rotate. Accordingly, it would potentially be feasible to increase the load capacity of the jib crane, and thus the issue of the sludge pumps attached to the tank bottom would be solved. Moreover, it is attainable to extend the scope of this crane in this way.
Źródło:: Journal of Mechanical and Energy Engineering; 2022, 6, 2; 1--6
2544-0780
2544-1671
Pojawia się w:: Journal of Mechanical and Energy Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Determining parameters to optimize the pulling force for the luffing jib tower cranes by Taguchi method
Autorzy:: Duong, Truong Giang
Powiązania:: https://bibliotekanauki.pl/articles/27309894.pdf
Data publikacji:: 2023
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:: geometric size
luffing jib
optimal technique
pulling force
Taguchi method
rozmiar geometryczny
optymalna technika
siła ciągnąca
Metoda Taguchiego
Opis:: The presented problem consists in optimizing the pulling force of the luffing jib tower cranes, in order to reduce power and save energy by determining reasonable geometrical parameters such as placement of pulley assemblies, position of jib pin, and jib length. To determine the optimal parameters, a mechanical model was developed to calculate the pulling force of the research object. Then, the Taguchi method and Minitab software were applied to evaluate the influence of the parameters. The objective function was the minimum pulling force of the luffing jib. The calculation results show that the position of the pulley assembly used to pull the jib is the most influential factor on the objective function accounting for 81.15%, the less significant factors are the jib length, the pin position of the jib, and the pulley assembly that changes the direction of the load lifting cable. The result of the test presented in the article allowed for determining the rational parameters, and the optimal position of the pulley assemblies on the top of the crane. In the case of the pulley assembly located at the top of the crane, one obtains the optimal height of the crane head H≈0.4 L c.
Źródło:: Archive of Mechanical Engineering; 2023, LXX, 3; 387--407
0004-0738
Pojawia się w:: Archive of Mechanical Engineering
Dostawca treści:: Biblioteka Nauki

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