Erosion Problems In Pneumatic Transport Installations

• Autorzy: Krupicz B.
• Języki publikacji: EN

Abstrakty

EN

In the paper, the analysis of erosion of a fan blade was conducted. Erosion is recorded into two zones on the blade. In the first zone, erosion occurs at the front of the blade and it is caused by particle’s impacts during first contact. This is “impact erosion” zone. Second “friction erosion” zone is formed in the place of the next contact, determined by the angle rotation of the rotor Δϕ and the path of rebound s. The impact takes place at the angle α with participation of friction forces. Dependences of particle’s velocities on stress, which cause plastic strains on surface layer, were presented. Coefficient of velocity restitution in the stream ks=βk was calculated. Restitution coefficient of particle’s velocity in a stream always amounts to β ≥ 1. Its value can be determined by f.e.: shape of particle’s, their diameter, stream velocity. Time τ between successive impacts is the function of rotor angular velocity and restitution coefficient k. Angle of rotation Δφ is only depends on coefficient k. The equation describing dependence of angle rotation Δφ on coefficient ks is as follows: Δφ(1+k) = tg(Δφ). The solution of the equation was presented in a graphical way.

Słowa kluczowe

EN

stream erosion; restitution coefficient; fan blades

• Wydawca: Faculty of Ocean Engineering and Ship Technology, Gdańsk University of Technology
• Czasopismo: Journal of Polish CIMAC
• Rocznik: 2009
• Tom: Vol. 4, no 2
• Strony: 145--154
• Opis fizyczny: Bibliogr. 13 poz., rys., tab., fot.

Twórcy

autor

Krupicz B.

• Bialystok Technical University ul. Wiejska 45C, 15-351 Bialystok, Poland tel.: [phone], fax: [phone],

Bibliografia

• [1] Chmielniak, T., Erozja pyłowa w maszynach przepływowych. Przegląd zagadnień. Zag. Eksp. Maszyn, Vol. 76, No. 4, 1988, pp. 339-458.
• [2] Krupicz, B., Liszewski M.: Mechanizmy erozji podczas rozdrabniania w młynie wirnikowym, Tribologia t. 37, nr 2, 2007, pp. 123-132.
• [3] Lou, H.Q., Erosion of materials by alumina slurry – Part 1, Wear 134, 1989, pp. 253 –269, Part 2, Wear 134, 1989, pp. 271 – 281.
• [4] Bitter, J. G. A., A study of erosion phenomena , Wear No. 6, 1962, Part 1, pp. 5-21, Part 2, pp.169-190.
• [5] Timoshenko, S., Goodier, J.N., Teoria sprężystości. Wyd. Arkady, Warszawa 1951.
• [6] Мышкин, Н.К., Петроковец, М.И., Трибология. Принципы и приложения,. ИММС НАНБ,. Гомель 2002..
• [7] Барсуков, В.Г., Крупич, Б., Свириденок, А.И., Особенности ударного взаимодействия твердых частиц с лопастью вентиляторов, Трение и износ, vol. 25, nr 1, 2004, pp. 41-47.
• [8] Krupicz, B., Rola współczynnika restytucji prędkości twardych cząstek w procesie erozyjnym wentylatorów, Zeszyty Naukowe Nr 10 (82) Akademii Morskiej w Szczecinie, 2006, pp. 299-307.
• [9] Барсуков, В.Г., Крупич, Б., Трибомеханика дисперсных материалов, Технологические приложения, GGU, Grodno 2004.
• [10]Крупич, Б., Мухаметвалиев, Р.Ф., Барсуков, В.Г., Испытания материалов на удар по методу падающего шарика с учотом аэродинамического сопротивления, Materiały konferencyjne II Sympozjum Mechaniki Zniszczenia Materiałów i Konstrukcji Augustów 2003, pp. 175-178.
• [11]Fukahori, Y., Yamazaki, H., Mechanism of rubber abrasion. Part 3: how is friction linked to fracture in rubber abrasion?, Wear 188, 1995, 19-26.
• [12]Fukahori,Y., Liang, H., Busfield, J.J.C., Criteria for crack initiation during rubber abrasion, Wear 265, 2008, 387–395.
• [13]Клейс,Н., Паппель,Т., Хусайнова,И., Щеглов,И., Исследование процесса ударных взаимодейстий частиц, Трение и износ vol. 18, nr 6, 1997, pp. 730-735.