The modification of the raceway profile in the double row slewing bearing

• Autorzy: Kania L. , Śpiewak S. , Pytlarz R.

Identyfikatory

DOI

10.5604/12314005.1213546

• Języki publikacji: EN

Abstrakty

EN

The slewing bearings are applied in heavy working machines and operated in extreme conditions. A characteristic feature of these bearings are a high load which determining a large deflection of a contact zone rolling element - raceway. This phenomenon combined with the effects of a bearing clearance causes a significant increase in a contact angle of the bearing. This in turn causes displacement of the contact zone to an undesirable position. In the construction of slewing bearing is applied of a large value of the osculation ratio. This leads to occur of large sizes of the contact zone identified in a radial cross-section. The sizes are comparable to values of the radius of the ball. The contact zone is type of quasi-linear. Effects of changes the position of the contact zone in the double-row ball slewing bearing has been presented in the paper. The raceway profile for such bearing consists of the arc section changing in the radial section. When the contact zone includes a change point of curvature of the raceway profile it comes to a concentration of a contact stress, and this is unfavourable for operation of the bearing. In order to eliminate this phenomenon to the profile introduced a transition curve. For this purpose was selected a clothoid. The curve ensures a gradual change of curvature from the arc section of the profile to the zero curvature of the straight profile section. The raceway profile becomes the smooth curve of the second rank. In the article are presented a numerical model of the contact zone for the double-row ball slewing bearing and the distributions of a pressure in the contact zone for the ordinary and modified raceway profiles. The calculation results have been presented as graphs of the distributions of the pressure along the contact zone. It has been shown that the introduction modification of the raceway profile eliminates the concentration of the pressure along the contact zone profile. The results obtained can be used during design of the raceway profiles of the double-row ball slewing bearing.

Słowa kluczowe

EN

slewing bearings; contact zone; fem analysis

• Wydawca: Łukasiewicz Research Network - Institute of Aviation ; European Science Society of Powertrain and Transport KONES Poland ; Wydawnictwo Instytutu Technicznego Wojsk Lotniczych
• Czasopismo: Journal of KONES
• Rocznik: 2016
• Tom: Vol. 23, No. 1
• Strony: 139--146
• Opis fizyczny: Bibliogr. 9 poz., rys.

Twórcy

autor

Kania L.

• Czestochowa University of Technology, Institute of Mechanics and Basic of Machine Design Dabrowskiego Street 73, 42-201 Czestochowa, Poland tel.:[phone], fax: [phone]

autor

Śpiewak S.

• Czestochowa University of Technology, Institute of Mechanics and Basic of Machine Design Dabrowskiego Street 73, 42-201 Czestochowa, Poland tel.:[phone], fax: [phone]

autor

Pytlarz R.

• ZF TRW Active & Passive Safety Technology, Seat Belt Plant Czestochowa Legionow Street 33, 42-200 Czestochowa, Poland tel.: [phone], fax [phone]

Bibliografia

• [1] ADINA. Theory and Modeling Guide, Vol. 1, ADINA R&D. Inc., Watertown 2004.
• [2] Brändlein, J., Eschmann, P., Hasbergen, L., Weigand, K., Ball and Roller Bearings: Theory Design and Application, 3 Ed. Wiley, 1999.
• [3] Kania, L., Krynke, M., Mazanek, E., A catalogue capacity of slewing bearings, Mechanism and Machine Theory, Vol. 58 (12), 12, pp. 29-45, 2012.
• [4] Kania, L., Local problems in Numerical Modelling of Slewing Bearings, Series: Monographs, No 236, Wydawnictwo Politechniki Częstochowskiej, Częstochowa 2012.
• [5] Kania, L., Modelling of cylindrical crowned correction of roller generator in slewing bearing. Measurement Automation and Monitoring, Vol. 54 (7), pp. 417-420, 2008.
• [6] Kania, L., Pytlarz, R., Reszka, P., The Effect of Osculation on Pressure Distribution in Contact Area Between Ball and Raceways at Raceway Curvature Transition to Rectilinear Segment, XXV Konferencja Naukowa „Problemy Rozwoju Maszyn Roboczych”, Zakopane 2012.
• [7] Nabiałek, J., Kania, L., Kowalczyk, B., Łożyska toczne wielkogabarytowe, Katalog – Informator, „ZAFAMA” Sp. z o.o., Zawiercie 1997.
• [8] Palmgren, A., Ball & Roller Bearing Engineering, Francklische Verlagshandlung, Stuttgart 1964.
• [9] Rothe Erde Large-Diameter Antifriction Bearings, Hoesch Rothe Erde GmbH, Dortmund 1999.

Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.