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Sliding Contact Analysis between Chromium Plated Hydraulic Cylinder Rod and Seals

크롬 도금한 유압 실린더 로드와 시일 사이의 미끄럼접촉 해석

  • Park, Tae Jo (School of Mechanical Engineering, ERI, Gyeongsang National University) ;
  • Kim, Min Gyu (Undergraduate School of Mechanical Engineering, Gyeongsang National University)
  • Received : 2017.10.07
  • Accepted : 2018.02.06
  • Published : 2018.03.01

Abstract

The hydraulic cylinder seals are used not only to protect leakage of the working fluids but also to prevent incoming of foreign particles into the system. Chromium plating is generally applied to improve corrosion and wear resistance. It has been noticed that sealing surface damage occurs due to the hard foreign/wear particles contained in the hydraulic oil. In this study, a three-bodied sliding contact problem related with a PTFE seal, a spherical particle and chrome-plated steel substrate is modeled to investigate the relations to wear mechanism. Using the nonlinear finite element software, MARC/MENTAT, the deformed shapes, the von Mises and first principal stress distributions with plating thickness were compared. The sealing surface was mainly abraded by hard particles embedded in the seal. The plastic deformation of the steel substrate decreased with thicker plating. Hence it could be more effective to coat the sealing surface of a hydraulic cylinder with a hard material such as TiN, TiC and DLC.

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