중대형 굴삭기 유압시스템의 압력 맥동 저감 연구

다국어 초록 (Multilingual Abstract)

With hydraulic noise test facility, a variety of tests were performed to investigate the pulsation pressure generation mechanism and its transmission characteristics and to derive the noise control methodology. Many experiments were carried out by changing average pressure, flow rate, pump speed, hose length and MCV spool condition. From the test results, the correlations between pulsation pressure and other design parameters, such as static pressure, flow rate and MCV spool opening area and length of hose, were found out. And also each contribution factors were evaluated from the regression analysis. By changing hose length, the pulsation pressure resonance phenomenon was investigated. In order to find out the pulsation pressure reduction measures pulsation pressure analysis, such as pulsation pressure of hydraulic pump itself and pulsation pressure of hydraulic system, by using AMESim were studied. In addition hydraulic silencer was developed based on the Helmholtz resonator. And its performance was evaluated by installing the silencer at the excavator.

참고문헌 (Reference)

1 김영현, "공명기 배열을 이용한 중속 디젤엔진 배기 소음기의 저주파수 대역 성능 개선 연구" 한국소음진동공학회 19 (19): 693-698, 2009

2 Kim, Y. H, "Noise Contribution Analysis for the Noise Reduction of Excavator" 555-, 2004

3 "ISO 10767 : Determination of Pressure Ripple Levels Generated in Systems and Components, Part 3"

4 "ISO 10767 : Determination of Pressure Ripple Levels Generated in Systems and Components, Part 2"

5 "ISO 10767 : Determination of Pressure Ripple Levels Generated in Systems and Components, Part 1"

6 "Directive 2000/14/EC of the European Parliament and of the Council on the Approximation of the Laws of the Member States Relating to the Noise Emission in the Environment by Equipment for use Outdoors"