휠 로더 차축 테이퍼 롤러 베어링의 내구수명

국문 초록 (Abstract)

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 라면, 상온에 비해 과다 예압 상태가 되며, 내구수명은 약 20.3% 감소하는 결과를 나타내었다.

다국어 초록 (Multilingual 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°C, an excessive preload condition is expected compared with that at room temperature, and the durable life decreases by 20.3 %.

목차 (Table of Contents)

• 초록
• Abstract
• 1. 서론
• 2. 이론적 배경
• 3. 결론
• 참고문헌

참고문헌 (Reference)

1 Kang, H. S, "Study on the Development of a Ultra-High-Speed Spindle System Considering Thermal Characteristics" Chonnam University 2005

2 KBC, "Rolling Bearing, Catalog GB 41 500 KA"

3 Harris, T. A, "Rolling Bearing Analysis, Second Edition" John Wiley & Sons 158-193, 1984

4 Hertz, H, "On the Contact of Rigid Elastic Solids and on Hardness" MacMillan 163-183, 1896

5 Palmgren, A, "Influence of Load and Motion on the Lubrication and Wear of Rolling Bearing" 79 : 454-458, 1957

6 Ahn, T, K, "Endurance Life Estimation of Taper Bearing Units" 160-164, 2007

7 Yoon, K. C, "Design Methods of Application-Based Exclusive Ball Bearings Using Genetic Algorithms" Hanyang University 2000

8 Palmgren, A, "Ball and Roller Bearing Engineering, Third Edition" Burbank 73-99, 1958

9 Cattaneo, C, "A Theory Second Order Elastic Contact" 6 : 505-512, 1947

10 Kim, G, H, "A Study on the Durability Evaluation and Analysis Techniques of Wheel Bearing Hub Unit for Passenger Car" Korea University 2001

11 Jones, A. B., "A General Theory for Elastically Constrained Ball and Radial Roller Bearing Under Arbitrary Load and Speed Condition" 1960