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http://dx.doi.org/10.7736/KSPE.2016.33.2.139

Performance Analysis of Urethane Packing in the Hydraulic Breaker by a Finite Element Method  

Shin, Hyun Woo (Department of Mechanical Engineering, Doowon Technical University)
Hong, Jong Woo (Department of Mechanical Design, Doowon Technical University)
Choi, Yi Kwang (Bukwang BCT Co., Ltd.)
Publication Information
Journal of the Korean Society for Precision Engineering / v.33, no.2, 2016 , pp. 139-147 More about this Journal
Abstract
Performances of urethane packing in the hydraulic breaker were analyzed using a finite element method. Because of high temperature and high pressure in the hydraulic breaker, it is better to use urethane rather than rubber as a packing material. We obtained the physical properties of urethane at elevated temperature by the tensile test. We analyzed buffer seal and U-packing maintaining the pressure and preventing oil leakage. Deformation, stress distribution, contact length, contact pressure of packing at each pressure step were obtained using finite element analysis. As the temperature increases, stress and contact force tend to decrease at low pressure. As the gap between piston and cylinder increases, contact length and contact forces decrease. Consequently, it is possible to design the packing section using these analyses, and construct a system to predict the possibility of oil leakage in the hydraulic breaker.
Keywords
Hydraulic breaker; Packing; Urethane; Hyperelastic; Finite element method;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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