Influence of the local defect distribution on vibration characteristics of ball bearings

• Autorzy: Liu Jing , Xu Yajun , Wang Linfeng , Xu Zidan , Tang Changke

Identyfikatory

DOI

10.17531/ein.2019.3.15

Warianty tytułu

PL

Wpływ rozkładu wad lokalnych na charakterystykę drgań łożysk kulkowych

• Języki publikacji: EN

Abstrakty

EN

Local defects in ball bearings may occur at the center line of raceway and its surrounding areas. However, most current studies were concentrated in studying the influence of the local defect located at the centerline of raceway on the bearing vibrations, where the effects of local defects surround the centerline were ignored. To overcome this problem, based on Hertzian point contact theory and multi-body dynamic algorithm, a multi-body dynamic model considering the offset and angular distributions for a ball bearing with a local defect on its outer raceway is established. The influences of offset distance and skew angle between the geometric center of local defect and the centerline of outer raceway on the bearing vibrations are investigated. The relationship between the offset distance and the impulse waveform characteristics is obtained, as well as that between the skew angle and the impulse waveform characteristics. The results show that the offset distance and skew angle of the local defect have a great influence on the time-domain impulse waveform characteristics of the bearing accelerations. This paper can provide a useful guidance for the accurate diagnosis of early local fault in the ball bearings.

PL

Wady lokalne łożysk kulkowych mogą występować na linii środkowej bieżni oraz w otaczających ją obszarach. Jednak większość dotychczasowych badań nad wpływem wad lokalnych na drgania łożyska koncentruje się na wadach linii środkowej bieżni ignorując oddziaływanie wad zlokalizowanych w obszarach otaczających tę linię. Aby rozwiązać ten problem, w przedstawionej pracy wykorzystano teorię kontaktu Hertza oraz algorytm do analizy dynamiki układów wieloczłonowych, co pozwoliło na utworzenie modelu dynamiki układu wieloczłonowego uwzględniającego przesunięcie i rozkłady kątowe łożyska kulkowego z lokalną wadą na bieżni zewnętrznej. Badano wpływ wartości przesunięcia i kąta nachylenia między geometrycznym środkiem wady lokalnej a linią środkową bieżni zewnętrznej na drgania łożyska. Otrzymano zależności pomiędzy wartością przesunięcia a charakterystyką przebiegu impulsu, a także między kątem nachylenia a charakterystyką przebiegu impulsu. Wyniki pokazują, że wartość przesunięcia i kąt nachylenia wady lokalnej mają duży wpływ na przebieg przyspieszeń łożyska w dziedzinie czasu. Praca dostarcza pożytecznych wskazówek na temat trafnego diagnozowania lokalnych uszkodzeń łożysk kulkowych w ich wczesnych stadiach.

Słowa kluczowe

EN

ball bearing; local defect; multi-body dynamics; vibrations; distribution

PL

łożysko kulkowe; wada lokalna; dynamika układów wieloczłonowych; drgania; rozkład

• Wydawca: Polskie Naukowo-Techniczne Towarzystwo Eksploatacyjne
• Czasopismo: Eksploatacja i Niezawodność
• Rocznik: 2019
• Tom: Vol. 21, no. 3
• Strony: 485--492
• Opis fizyczny: Bibliogr. 32 poz., rys., tab.

Twórcy

autor

Liu Jing

• State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing, 400030 College Engineering, Chongqing University, Chongqing, 400030 China

autor

Xu Yajun

• College Engineering, Chongqing University, Chongqing, 400030 China

autor

Wang Linfeng

• College Engineering, Chongqing University, Chongqing, 400030 China

autor

Xu Zidan

• College Engineering, Chongqing University, Chongqing, 400030 China

autor

Tang Changke

• College Engineering, Chongqing University, Chongqing, 400030 China

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