Diesel split type cylinder cap

Abstract

This invention is related to a diesel engine separate type cylinder cover, including a cylinder cover, a plate for shutting off water mounted the cylinder cover and a body, a cooling water chamber of a burning room placed between a cylinder sleeve and the plate for shutting off water; the burning room consisting of the cylinder cover and the cylinder sleeve is flexibly connected with the cooling water chamber of a burning room through a rubber sealing element. A gap of 1.5-2 mm is between the bottom of the cylinder cover and the plate for shutting off water; a water inlet and outlet passages of the plate for shutting off water are cone. The mode of mounting the plate for shutting off water between the cylinder cover and the body eliminates the cylinder cover crackle caused by heat stress concentration, and reduces the cavity bubble in the cooling water, prevents the serious cavitation erosion, enlarges the service life of the cylinder cover; and the plate for shutting off water is easy to mount; before improving, the mounting state of the cylinder cover only can be checked after the whole machine press test is reset, and it is simple and convenient for judging the mounting state of the cylinder cover through directly viewing the mounting state of the rubber ring after processing the separate improvement.

Description

technical field [0001] The invention relates to a cylinder head of a diesel engine, in particular to a cylinder head with a cooling water chamber for a combustion chamber. Background technique [0002] At present, the function of the cylinder head of Yanmar 6N260-EN diesel engine is to close the working space of the cylinder to form the combustion chamber, which is used to install the fuel injector, the intake and exhaust valves, the starting valve and the safety valve of the indicator valve. In addition to the air passage and cooling water cavity, there is also a combustion chamber cooling water cavity on the lower ring edge of the cylinder head ( figure 1 As shown, the combustion chamber is embedded in the cylinder head), because the working conditions of the cylinder head are very harsh, on the one hand, it has to bear the installation stress caused by the pre-tightening force of the cylinder head bolts and the high pressure caused by the periodic change of gas pressure i...

AI Technical Summary

Problems solved by technology

[0003] Although the Yanmar 6N260-EN diesel engine has a relatively advanced design of the cooling water cavity in the combustion chamber theoretically, it is unreasonable in terms of the actual stress distribution, casting wall thickness and water cavity structure. The cooling water chamber of the cylinder head is an integral structure. It is difficult to take measures to achieve the purpose of repairing and using after cracks and cavitation occur, and the workload of each disassembly is large. In addition, the stress concentration and thin wall of the lower part of the cylinder head are prone to cracks The inner wall of the water cavity is prone to cavitation

Images