Air cylinder cover

Abstract

The invention relates to an air cylinder cover suitable for a supercharged and intercooled structure engine. The air cylinder cover comprises an air cylinder cover body. An air inlet valve seat is arranged at the part, corresponding to an air inlet valve, of the bottom of the air cylinder cover body; an air exhaust valve seat is arranged at the part, corresponding to an air exhaust valve, of the bottom of the air cylinder cover body; a cooling water sleeve is arranged inside the air cylinder cover body; a plurality of cooling water holes are formed in the air cylinder cover body; each cooling water hole communicates with the interior of the cooling water sleeve to form a cooling water circulating channel; a cavitation erosion preventing casing arranged on the air exhaust valve seat in a sleeving mode is further arranged at the bottom of the air cylinder cover body; a cooling water cavity is formed between the cavitation erosion preventing casing and the air exhaust valve seat; and through holes with one ends communicating with the cooling water cavity and the other ends communicating with the cooling water circulating channels are formed in the cavitation erosion preventing casing. The influence of cavitation erosion on the air cylinder cover can be relieved, and the service life of the air cylinder cover is prolonged substantially.

Description

technical field [0001] The invention relates to a cylinder head. Background technique [0002] The role of the cylinder head is to seal the cylinder liner and form the combustion chamber space together with the piston. Its structure and shape are complex. In addition to being subjected to high temperature and high pressure gas, it must also bear a large bolt pre-tightening force. The temperature distribution of each part of the cylinder head is very uneven. For example, the temperature of the combustion chamber on the bottom surface is very high, while the temperature of the cooling water jacket is relatively low, and the temperature difference between the intake and exhaust passages is also large. Both are big. [0003] The working environment of the cylinder head is extremely complex and requires high requirements for the cooling system. At present, similar models adopt fresh water cooling structure, especially the cylinder heads used in ocean voyages mostly have the phen...

AI Technical Summary

Problems solved by technology

[0003]The working environment of the cylinder head is extremely complex and requires high cooling system. At present, the same type of models adopt fresh water cooling structure. Cylinder head failure caused by cover valve seat cavitation

The service life of the cylinder head is greatly reduced due to cavitation, which has become an important problem restricting the development of the cylinder head

[0004] In the prior art, the non-water-cooled structure of the intake valve seat is usually used to reduce the above-mentioned cavitation phenomenon, but this structure is only for the structure of the intake valve seat Improvements cannot completely and effectively solve the cavitation problem, and may even cause more serious cavitation problems at the exhaust valve seat

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