Design and Experimental Study on the Urea-SCR Converter Exhaust System of the Marine Diesel Engine

2013 ◽  
Vol 291-294 ◽  
pp. 1889-1894
Author(s):  
Lei Jiang ◽  
Jun Huang
Keyword(s):  
Experimental Study ◽  
Diesel Engine ◽  
Pressure Loss ◽  
Catalytic Converter ◽  
Exhaust System ◽  
Marine Diesel Engine ◽  
Exhaust Gas ◽  
Marine Diesel ◽  
New Type ◽  
Design Requirements

Urea-SCR catalytic converter can effectively reduce the NOx emission of diesel engines, but meanwhile catalytic converter will cause some pressure loss in the exhaust system, which has negative influences on the engine performances. In this paper, the method of theoretical analysis calculated the pressure loss of the SCR catalytic converter, and designing a new type of exhaust gas pipe. Through the test to meet the design requirements,the results can provide a reference for optimum design of SCR catalytic converters and assembling.

Analysis on Sealing and Deformation of Exhaust Valve Housing of Marine Diesel Engine

2013 ◽  
Vol 690-693 ◽  
pp. 1887-1890
Author(s):  
Ji Wu ◽  
Shu Lin Duan ◽  
Zhan Hua Wu ◽  
Hui Xing ◽  
Wen Chun Zhang
Keyword(s):  
Diesel Engine ◽  
Simulation Method ◽  
Exhaust Valve ◽  
Marine Diesel Engine ◽  
Exhaust Gas ◽  
Total Deformation ◽  
Maximum Deformation ◽  
Marine Diesel ◽  
Bolt Pretension ◽  
Valve Housing

MAN Diesels 6S50MC-C disel is a two-stroke marine diesel engine. Preload of the exhaust valve component is applied in four bolts. The preload of bolts can improve the fatigue strength of the exhaust component. In addition, the bolt pretension ensure the sealing in the maximum firing pressure. Using of simulation method, the displacement and deformation of exhaust valve component are analyzed when the maximum firing pressure and preload are applied. By analysis of the deformation of the exhaust valve housing under different preload force, the deformation of exhaust valve housing increase with the increaseing of preload. The maximum total deformation is 0.40mm in the preload of 720KN. The maximum deformation occurs in the region near the bolt in the side of exhaust gas outlet. The deformation in the direction of Y-axis of exhaust valve housing is along the Y-axis opposite direction when the preload is greater than 540KN. This indicates that the exhaust valve seal well. The sealing and deformation of the exhaust valve component meets the desgin requirement.

Sign in / Sign up

Export Citation Format

Share Document