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Endurance Life of Taper Roller Bearing for Wheel Loader Axles

휠 로더 차축 테이퍼 롤러 베어링의 내구수명

  • Yoo, Dae Won (Machine System Design, Graduate School of Knowledge based Technology and Energy, Korea Polytechnic Univ.) ;
  • Lee, Jai Hak (Dept. of Mechanical Design Engineering, Korea Polytechnic Univ.)
  • 유대원 (한국산업기술대학교 지식기반기술.에너지대학원 기계시스템설계학과) ;
  • 이재학 (한국산업기술대학교 기계설계공학과)
  • Received : 2013.03.08
  • Accepted : 2013.09.03
  • Published : 2013.11.01

Abstract

A wheel loader is a type of construction machinery that is capable of performing a variety of tasks, and demands on its functional diversity and structural reliability are growing. A wheel bearing is one of the core components that determine the life of the loader; taper roller bearings are commonly used for this purpose. The lifetime of a bearing is typically calculated based only on its load and revolution speed. The initial preload of a taper roller bearing is a critical factor that directly affects its endurance life. In this study, the relations between the endurance life and preload characteristics including the amount of preload according to the weight, rotational speed, and thermal modification applied to tapered roller bearings are presented. When the temperature is $100^{\circ}C$, an excessive preload condition is expected compared with that at room temperature, and the durable life decreases by 20.3 %.

휠 로더는 다양한 작업이 가능한 건설장비 중의 하나로서, 기능적 다양성과 구조적 신뢰성 향상의 요구가 증대되고 있다. 휠 베어링은 로더의 수명을 결정하는 핵심부품 중 하나이며, 테이퍼 롤러 베어링이 사용되고 있다. 일반적인 베어링 수명은 하중과 회전속도로 계산되고 있다. 테이퍼 롤러 베어링의 초기 예압은 내구수명에 직접적인 영향을 미치는 중요한 인자이다. 본 논문은 테이퍼 롤러 베어링에 작용하는 하중, 회전속도, 열 변형에 따른 초기 예압량을 포함한 내구수명 및 예압특성 관계를 제시하였다. 사용온도가 $100^{\circ}C$라면, 상온에 비해 과다 예압 상태가 되며, 내구수명은 약 20.3% 감소하는 결과를 나타내었다.

Keywords

References

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Cited by

  1. vol.17, pp.2, 2014, https://doi.org/10.5293/kfma.2014.17.2.073