피스톤-실린더 기구에서 오일압력 분포에 관한 실험적 연구 = An Experimental Study on Oil Pressure Distribution in the Piston-Cylinder Mechanism

다국어 초록 (Multilingual Abstract)

The piston-cylinder mechanism is widely adopted in the hydraulic machine components. In these cases, the hydrodynamic pressures are generated in the clearance gap between the piston and cylinder under lubrication action of the piston. Under the eccentric and tilted condition of the piston in the cylinder bore, the non-symmetric pressure distributions in the circumferential direction result in lateral forces. When the lateral forces act as increasing the eccentricity and tilting ratios, excessive wear can be result in cylinder and piston which are well known "hydraulic locking" phenomena. In this paper, the hydrodynamic pressures generated in the clearance are measured using a stationary piston and moving cylinder apparatus. The experimental results showed that the hydrodynamic pressure distributions are highly affected by the speed and eccentricity of the cylinder and the oil viscosity.

목차 (Table of Contents)

• ABSTRACT
• 1. 서론
• 2. 실험장치의 설계 및 제작
• 3. 실험
• 4. 실험결과 및 고찰
• 5. 결론
• 참고문헌

참고문헌 (Reference)

1 京極啓史, "油圧ピ ストンポンプ․モータの潤滑特性(第2報)-ピストン․ シリンダ間の油膜厚さ測定" 36 (36): 28-35, 1991

2 京極啓史, "油圧ピ ストンポンプ․モータの潤滑特性(第1報)-ピストン․ シリンダ間の摩擦力測定" 35 (35): 914-921, 1990

3 松本和幸, "斜板式アキシアルピストンモータの微速時におけるピストンの摩擦特性" 57 (57): 2729-2733, 1991

4 田中嘉津彦, "ピストンポンプ․モータにおけるピストンの回転運動と摩擦力" 59 (59): 1192-1197, 1993

5 Dowd, J. R, "Tribological Interaction between piston and Cylinder of a Model High Pressure Hydraulic Pump" 18 (18): 21-30, 1975

6 Kim, Y. H, "Measurement of Hydrodynamic Pressure Distribution between a Piston and Cylinder" 419-420, 2002

7 Park, T. J, "Hydrodynamic Lateral Force on a Tapered Piston Subjected to Large Pressure Gradient" Int. Academic Pub 44-48, 1993

8 Mannam, J., "Further Aspects of Hydraulic Lock" 173 : 699-716, 1959

9 Backe' , W., "Experimentelle Ermittlung der Druck und Temperaturverteilung in Dicht und Largerfugen hydrostatischer Maschinen" Inst. f¨ur Hydraulishche und Pneumatische Antrieb und Steuerungender RWTH Aachen 1994

10 Blackburn, J. F., "Contributions to Hydraulic Control - 5 Lateral Forces on Hydraulic Pistons"

11 Manhajm, J, "An Investigation of Hydraulic Lock" 169 : 865-879, 1953