Calculations of labyrinth seals with and without diagnostic extraction in fluid-flow machines

• Autorzy: Kaszowski P. , Dzida M. , Krzyślak P.
• Języki publikacji: EN

Abstrakty

EN

Labyrinth seals are essential components of steam turbine unit constructions. Two types of labyrinth seals can be named, the first of which is the seal without diagnostic steam extraction, and the second – with extraction. The distribution of flow parameters along the packing is affected remarkably by the average seal clearance. The presence of diagnostic extraction leads to the equation system which is determinable and can be inversed to calculate the average seal clearance Si. Analysing the obtained results leads to the conclusion that the information about this parameter provides opportunities to monitor the current state of the packing in real time. The applied calculation procedure bases on the de Saint - Venant equation. The article also includes a brief description of both types of seals.

Słowa kluczowe

EN

labyrinth seals; Fanno curve; diagnostic extraction

• Wydawca: Gdańsk University of Technology, Faculty of Ocean Engineering & Ship Technology
• Czasopismo: Polish Maritime Research
• Rocznik: 2013
• Tom: nr 4
• Strony: 34--38
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Kaszowski P.

• Faculty of Ocean Engineering and Ship Technology Gdansk University of Technology Narutowicza 11/12 80-233 Gdansk, POLAND

autor

Dzida M.

• Faculty of Ocean Engineering and Ship Technology Gdansk University of Technology Narutowicza 11/12 80-233 Gdansk, POLAND

autor

Krzyślak P.

• Faculty of Ocean Engineering and Ship Technology Gdansk University of Technology Narutowicza 11/12 80-233 Gdansk, POLAND

Bibliografia

• 1. Chmielniak T.: Steam turbines: theoretical background (in Polish). Wydawnictwo Politechniki Śląskiej (Publishing House of Silesian University of Technology),Gliwice, 1998
• 2. Kaszowski P.: Analysis of operation of labyrinth seals with extraction (in Polish). M.Sc. Thesis, Gdańsk University of Technology, Department of Energy Engineering and Industrial Apparatures, Gdańsk, 2011
• 3. Krzyślak P., Winowiecki M.: A method of diagnosing labyrinth seals in fluid-flow machines. Polish Maritime Research 3(57) Vol. 15, 2008, pp. 38-41
• 4. Perycz S.: Steam and gas turbines (in Polish). Wydawnictwo Politechniki Gdańskiej (Publishing House of Gdańsk University of Technology), Gdańsk 1988
• 5. Trütnovsky K.: Berührungsfreie Dichtungen, Grundlagen und Anwendungen der Strömung durch Spalte und Labirynthe (in German). VDI – VERLAG bh; (Verlag des Vereins Deutscher Ingeniuere), Düsseldorf, 1964