Wyniki wyszukiwania - BazTech

Ograniczanie wyników

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: oscylacje skrętne

Sortuj według:

Ogranicz wyniki do:

Characteristics of pneumatic tuners of torsional oscillation as a result of patent activity

Homišin J.

Acta Mechanica et Automatica

2016

Vol. 10, no. 4

316--323

Mechanical systems with combustion engines, compressors, pumps and fans, can be characterized as torsional oscillating mechanical systems (TOMS). It is therefore necessary to control their dangerous torsional vibrations. It was confirmed that dangerous torsional vibration can be reduced to acceptable level by an appropriate adjustment, respectively by tuning the TOMS. According to several authors, the most appropriate way of system tuning is application of suitable flexible element, which is flexible shaft coupling. It turned out that one of the types of shaft couplings, which are particularly suited to meeting this objective are pneumatic flexible shaft couplings, to act as so-called pneumatic tuners of torsional oscillations. The issue of research and development of pneumatic tuners of torsional oscillations, among other things is, long-term in the focus of the author. The existence of tuners creates the opportunity to develop new ways of tuning torsional oscillating mechanical systems. The author of the scientific article will focus on the characteristics of developed pneumatic tuners of torsional oscillation in terms of their design, construction, function, significance advantages and conditions imposed on pneumatic tuners based on the results of his patent activity. Simultaneously provides information about the characteristic properties of pneumatic tuners of torsional oscillations in the general design.

Problematyka likwidacji zwarć jednofazowych na liniach łączących bloki wielkiej mocy z systemem elektroenergetycznym

Kacejko P., Wancerz M.

Przegląd Elektrotechniczny

2012

R. 88, nr 10a

289-291

W referacie przedstawiono próbę rozstrzygnięcia różnic poglądów w zakresie zastosowania automatyki SPZ na liniach blokowych. Na podstawie badań symulacyjnych wykazano, że automatyka ta w wersji jednofazowej (JSPZ) może być stosowana na liniach blokowych elektrowni. Możliwość likwidacji zwarcia pozwala na utrzymanie bloku wytwórczego w pracy, co biorąc pod uwagę wielkość mocy znamionowej ma istotne znacznie dla utrzymania bilansu mocy w SEE. Towarzyszące działaniu JSPZ kołysania mocy nie stanowią zagrożenia dla wału turbozespołu.

Among the actual trends within the national electric power system development there is a construction of new generating units in already operating power plants. Their design includes partial use of the existing infrastructure but the new units are meant to be totally separate independently operating entities. In that case the length of a step-up line connecting the new unit to a power plant substation can be considerable. The question is what should be the reaction of the unit protection system to single phase – earth faults.