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논문 상세정보

유한요소법을 이용한 유압브레이커 Cylinder와 Piston의 열-구조 연성해석을 통한 안정성 평가

Assessment of Stability of Stability of Hydraulic Breaker Cylinder and Piston through Thermal-Structural coupled Field Analysis by Finite Element Method

Abstract

This study proves the causes of cylinder and piston jam by scratches which is the fatal problem of hydraulic breaker through the thermal analysis and thermal-structural coupled field analysis. The trouble from the scratch is a complex problem which can be caused by manufacturing process (this is an internal factor) and the users mistake or contamination in the hydraulic circuit (these are an external factor). Hence, it's not easy to investigate the causes, also hard to prevent the recurrence. In this reason, hydraulic breaker manufacturers are trying to improve the manufacturing process such as machining, heat treatment, grinding, cleaning, also to prevent the contamination in hydraulic circuit and to remove the remains. It's being managed thoroughly by manufacturers. This study shows the effect of the temperature rise by the frictional heat generated when the piston hits the tool on the hydraulic oil while the hydraulic breaker is operating, also the temperature distribution when it starts to affect main components of hydraulic breaker. The stress and the amount of deformation also could be found through thermal-structural coupled field analysis. It proved that the stress and deformation are proportionally increased according to the temperature rise in hit area, and it affects the cylinder and the viscosity of hydraulic oil inside the cylinder when it heats up beyond the certain temperature.

저자의 다른 논문

참고문헌 (9)

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  2. 2. H.J. Ha "Reliability Improvement of Hydraulic Breakers through Manufacturing Processes Improvement," Graduate School of AJOU University. 2010. 
  3. 3. D.Y. Shin, K.B. Kwon, K.W. Lee. "Summary of Recent Developments of Hydraulic Breakers," J. of The Kor. Fluid Power Systems Vol. 8, Issue 2. pp. 49-53, 2011. 
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  5. 5. Y.K. Lee, W.J. Sung, C.S. Song. "The development of an analysis tool and the performance analysis of a hydraulic breaker system," J. of the Korean Socirty of Precision Eng. vol. 17, no. 4, 2000. 04 
  6. 6. B.S. Kim et al. "A Study on the Structure Improvement of Bracket Housing for Structural Noise and Vibration Reduction in Hydraulic Breaker. Korea Society of Precision Engineering," J. of the Korean Socirty of Precision Enginnering. vol. 23, no. 11, pp. 108-115, 2006. 11 
  7. 7. K.S. Kwak and H.W. Chang. "Performance Optimization of a Fully Hydraulic Breaker using Taguchi Method," J. of the Kor. fluid power systems society Vol. 5, no. 3, pp.1-8, 2008. 09. 
  8. 8. K. Park, H.J. Eom. "Numerical analysis of injection molding of aspheric lenses for a mobile phone camera module," J. D&M Eng. Proceeding of Summer Annual Conference, pp.143-148, 2008. 
  9. 9. B.Y. Yang. "A study on the structural analysis of CNC multiple router system," J. D&M Eng. Vol. 9, no. 3, pp. 14-18, 2015. 

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