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Technical Briefs

Calculation of General Static Load-Carrying Capacity for the Design of Four-Contact-Point Slewing Bearings

[+] Author and Article Information
Josu Aguirrebeitia

Department of Mechanical Engineering, ETSI-BILBAO, University of the Basque Country, 48013 Bilbao, Spainjosu.aguirrebeitia@ehu.es

Rafael Avilés

Department of Mechanical Engineering, ETSI-BILBAO, University of the Basque Country, 48013 Bilbao, Spainrafael.aviles@ehu.es

Igor Fernández de Bustos

Department of Mechanical Engineering, ETSI-BILBAO, University of the Basque Country, 48013 Bilbao, Spainigor.fernandezdebustos@ehu.es

Mikel Abasolo

Department of Mechanical Engineering, ETSI-BILBAO, University of the Basque Country, 48013 Bilbao, Spainmikel.abasolo@ehu.es

J. Mech. Des 132(6), 064501 (May 25, 2010) (6 pages) doi:10.1115/1.4001600 History: Received November 24, 2009; Revised March 28, 2010; Published May 25, 2010; Online May 25, 2010

This paper presents a calculation of the general static load-carrying capacity of four-contact-point slewing bearings under axial, radial, and tilting-moment loads. This calculation is based on a generalization of Sjoväll and Rumbarger’s equations and provides an acceptance surface in the load space. This acceptance surface provides a solid basis to compute acceptance curves for the design and selection of bearings of this kind.

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Copyright © 2010 by American Society of Mechanical Engineers
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Figures

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Figure 1

Different types of slewing bearings (from Iraundi Bearings): (a) four-contact-point single row ball bearing, (b) crossed cylindrical roller bearing, (c) four-contact-point double row ball bearing, and (d) three-row cylindrical roller bearing

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Figure 2

Loads acting on a slewing bearing

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Figure 3

Moment–axial-force diagram for a four-contact-point slewing bearing

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Figure 4

Geometrical-interference model

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Figure 5

Acceptance point cloud. N=20

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Figure 6

Rendered triangulation of the acceptance surface

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Figure 7

Acceptance curve in the FA−M plane

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Figure 8

Acceptance curve in the FR−M plane

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Figure 9

Acceptance curve in the FA−FR plane

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Figure 10

Acceptance curves in the FA−FR plane for various values of the normalized moment

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