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논문 기본 정보

자료유형
학술저널
저자정보
조봉진 (Seoul National University) 안성욱 (Seoul National University) 이창주 (Seoul National University) 윤영환 (J&F Solution) 이수성 (Taesung) 김학진 (Seoul National University)
저널정보
유공압건설기계학회 드라이브·컨트롤 드라이브·컨트롤 Vol.13 No.2
발행연도
2016.6
수록면
10 - 18 (9page)

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초록· 키워드

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A front-end loader (FEL) mounted on an agricultural tractor is one of the most commonly used implements to mechanize routine agricultural tasks. When the FEL is used with a loaded bucket, careful operation is required to maintain safety and avoid spillage when the tractor passes a bump because a change in the gravity center of the tractor due to varied loadings can affect the stability of the tractor. Use of a boom suspension system consisting of accumulators and orifice dampers can be instrumental in reducing pitching vibrations while increasing the handling performance of the FEL-mounted tractor. The objective of this research was to reduce bump shocks by adding an orifice and a flow control valve to the original hydraulic circuit composed solely of accumulators. A simulation study was performed using the SimulationX program to investigate the effects of an accumulator and an orifice-throttle damper on bump shocks. Results showed that the peak pressure on a boom cylinder and the vertical acceleration of a bucket were significantly affected by use of both an accumulator and an orifice damper. In a field test conducted with a 75-kW tractor, the peak pressure of the boom cylinder, and the root mean square (RMS) vertical acceleration of the bucket and seat were reduced by on average, 23.0, 42.2, and 44.9% respectively, as compared to those measured with the original accumulator system, showing that an improved design for the
accumulator hydraulic circuit can reduce bump shocks. Further studies are needed to design a tractor suspension system that includes the effects of cabin suspension and tires as well as dynamic analysis.

목차

Abstract
1. 서론
2. 붐 서스펜션 유압회로 설계 및 시뮬레이션
3. 붐 서스펜션 시스템 장착 주행 실차 실험
4. 결과 및 고찰
5. 결론
References

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