The Open Mechanical Engineering Journal

2016, 10 : 126-134
Published online 2016 June 13. DOI: 10.2174/1874155X01610010126
Publisher ID: TOMEJ-10-126

RESEARCH ARTICLE
 Optimization of the Location of the Oil Cooling Gallery in the Diesel Engine Piston

Lijun Deng1 , Yongqi Liu2, * , Zhiming Wang1 , Shiying Liu2 and Jian Zhang3
1 School of Energy & Power Engineering, Shandong University, Jinan 250061, China
2 School of Traffic & Vehicle Engineering, Shandong University of Technology, Zibo 255049, China
3 Department of Electrical Engineering, Binzhou University, Binzhou, 256600, China

* Address correspondence to this author at the School of Traffic & Vehicle Engineering, Shandong University of Technology, Zibo 255049, China; E-mail: liuyq65@163.com

ABSTRACT

The oil cooling gallery is arranged at the top of the piston, which can effectively reduce the heat load of the piston. In this paper, finite element analysis and fatigue analysis by FE-safe are used to calculate the effects of the different positions of the oil cooling gallery to the temperature, stress field and the fatigue strength of the bowl rim, top land, first ring groove, second land and cooling gallery. The results show that, with the oil cooling gallery moving upward regularly, the temperature of the oil cooling gallery increased, and the temperature of other piston critical position decreased; but when the distance of the oil cooling gallery and combustion chamber decreased, the structural strength of the combustion chamber decreases gradually. In addition, too small distance between the oil cooling gallery and the top surface will make the temperature of the oil cooling gallery too high, which makes the oil coking in the oil cooling gallery, affecting the cooling effect seriously. For this type of piston, the optimal distance between the oil cooling gallery and the top surface is 12.5mm.

Keywords:

Cooling gallery, Fatigue trength, Finite element analysis, Piston.