Optimization of the Location of the Oil Cooling Gallery in the Diesel Engine Piston
Lijun Deng1, Yongqi Liu2, *, Zhiming Wang1, Shiying Liu2, Jian Zhang3
Identifiers and Pagination:Year: 2016
First Page: 126
Last Page: 134
Publisher Id: TOMEJ-10-126
Article History:Received Date: 26/10/2015
Revision Received Date: 29/1/2016
Acceptance Date: 1/2/2016
Electronic publication date: 13/06/2016
Collection year: 2016
open-access license: This is an open access article licensed under the terms of the Creative Commons Attribution-Non-Commercial 4.0 International Public License (CC BY-NC 4.0) (https://creativecommons.org/licenses/by-nc/4.0/legalcode), which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.
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.