Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Damping Device for Hydraulic Breaker: Impact and Noise Reduction

유압 브레이커 메인바디의 충격 및 소음 저감을 위한 완충 장치에 대한 연구

  • Cho, Byung Jin (Department of Rolling Stoke System, Seoul National University of Science and Technology) ;
  • Han, Hoon Hee (Department of Rolling Stoke System, Seoul National University of Science and Technology) ;
  • Koo, Jeong Seo (Department of Railway Safety Engineering, Seoul National University of Science and Technology)
  • 조병진 (서울과학기술대학교 철도차량시스템공학과) ;
  • 한훈희 (서울과학기술대학교 철도차량시스템공학과) ;
  • 구정서 (서울과학기술대학교 철도안전공학과)
  • Received : 2018.06.01
  • Accepted : 2018.06.19
  • Published : 2018.08.31
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Abstract

A hydraulic breaker is an attachment of an excavator, and it crushes stones. Recently, research to reduce the impact and noise of breakers are ongoing. In this paper, a method to improve the upper, lower, and side dampers, which act as insulation for the attenuation of vibration during breaker operation, is studied through testing and simulation. To obtain the nonlinear material constants required for the simulation, the biaxial tensile test was performed with urethane, which is a material used for dampers. The existing parts and the improved parts were compared and evaluated using the LS-DYNA program. As a result, 50% of the equivalent stress was reduced in the bracket body of the hydraulic breaker, and the equivalent stress of the side damper was also decreased. We verified that the fatigue conditions were satisfied by performing a fatigue analysis.

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References

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