[ Article ]

Journal of the Korean Society of Manufacturing Technology Engineers - Vol. 33, No. 1, pp.35-43

ISSN: 2508-5107 (Online)

Print publication date 15 Feb 2024

Received 07 Jan 2024 Revised 05 Feb 2024 Accepted 07 Feb 2024

DOI: https://doi.org/10.7735/ksmte.2024.33.1.35

복합하중을 받는 외륜 분할 3점 접촉 볼베어링 특성 연구

사진혁^a ; 김동혁^a ; 리베라 길버트^b ; 홍성욱^c^{, *}

Study on the Characteristics of Split-Outer-Ring Three-Point Contact Ball Bearings Subjected to Combined Loads

Jin-Hyeok Sa^a ; Dong-Hyeok Kim^a ; Gilbert Rivera^b ; Seong-Wook Hong^c^{, *}

aGraduate School, Department of Mechanical Engineering, Kumoh National Institute of Technology
bInstitute of Production Engineering, Kumoh National Institute of Technology
cDepartment of Mechanical System Engineering, Kumoh National Institute of Technology

Correspondence to: ^*Tel.: +82-54-478-7344 E-mail address: swhong@kumoh.ac.kr (Seong-Wook Hong).

Abstract

A split-outer-ring three-point contact ball bearing (SO-TCBB) features a removed portion in the circular outer-ring to allow three-point contact. This study introduces a quasi-static model to analyze contact characteristics and predict the occurrence of a phenomenon called truncation of contact area (TCA) in SO-TCBBs. TCA implies that portions of the contact areas between balls and outer-race partially separate, exacerbating premature wear and reduced bearing life. Under pure axial loads, an increase in the axial load leads to earlier occurrence of TCA in the inner ring. Combined loads cause varying contact points and TCA for each ball, with higher radial loads accelerating TCA. Increasing radial load results in an earlier occurrence of TCA. Appropriately increasing the amount of removed portion of the outer ring produces a three-point contact at lower speeds, effectively reinforcing resistance against centrifugal forces at both contact points on the outer ring and impeding the TCA in both inner and outer rings.

Keywords:

Angular contact ball bearing, Split-outer-ring three-point contact ball bearing, Contact load, Arching dimension, Truncation of contact area

Acknowledgments

본 연구는 금오공과대학교의 연구비 지원으로 수행되었습니다(2022~2023).

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Jin-Hyeok Sa

M.E. Candidate in Mechanical Engineering at Kumoh National Institute of Technology (KIT). His research interest is Bearing Modeling and Analysis.

E-mail: 20170552@kumoh.ac.kr

Dong-Hyeok Kim

M.E. Candidate in Mechanical Engineering at Kumoh National Institute of Technology (KIT). His research interest is Bearing Modeling and Analysis.

E-mail: 20236012@kumoh.ac.kr

Gilbert Rivera

Postmaster Researcher in Kumoh National Institute of Technology (KIT). His research interest is Bearing Modeling and Analysis.

E-mail: gibsrivera@kumoh.ac.kr

Seong-Wook Hong

Professor in the Department of Mechanical System Engineering of Kumoh National Institute of Technology. His current research interests include Spindle and Bearings Modeling and Analysis, Command Shaping for Positioning Systems, Vibration Control, and Structural Vibration Analysis for Mechanical Systems.

E-mail: swhong@kumoh.ac.kr