Half-dry half-wet type water cooling system oriented to combined-type combustion chamber of two-stroke aviation heavy oil piston engine

Abstract

The invention discloses a half-dry half-wet type water cooling system oriented to a combined-type combustion chamber of a two-stroke aviation heavy oil piston engine. A cooling water flow channel is cast in the combined-type combustion chamber zone of single-cylinder piston engine cylinders, cooling water in the cooling water flow channel can be injected and discharged through a water inlet system and a water outlet system, and accordingly water cooling can be implemented for the combined-type combustion chamber of a single-cylinder piston engine. Two gas inlet channels and one gas exhaust channel are further designed in the lower portion of a cylinder body. The gas outlet ends of the two gas inlet channels communicate with two gas inlets designed in the middle section wall face of a cylinder sleeve correspondingly. The gas inlet end of the gas exhaust channel communicates with a gas exhaust port designed in the middle section wall face of the cylinder sleeve. According to the cooling system disclosed by the invention, the dry and wet combined structural mode is adopted, cooling capacity and system rigidity are both taken into account, and the system reliability is improved. Moreover, water cooling serves as the cooling mode, the high-mechanical load and frictional strength using requirements of the two-stroke engine can be met, and applicability to the two-stroke engine is good.

Description

technical field [0001] The invention relates to a cooling system of an engine, in particular to a semi-dry and semi-wet water cooling system for a combined combustion chamber of a two-stroke aviation heavy oil piston engine. Background technique [0002] With the continuous development of engine technology, the working environment faced by the engine is becoming more and more specific and complex. The cooling performance of the engine has become an important factor to ensure its reliability. The requirements for the cooling system are also increasing when designing the engine. higher. [0003] The cooling system is an important part of the engine. Its function is to ensure that the engine works at the most suitable temperature. There are two types of engine cooling: water cooling and air cooling. It is a series of devices for cooling the engine by taking away the heat and dissipating it into the atmosphere in a certain way to reduce the temperature of the engine. It has th...

AI Technical Summary

Problems solved by technology

The two-stroke aviation heavy oil piston engine has high mechanical load, high friction, and high cooling capacity requirements. Although the air cooling system has a simple structure, the cooling capacity is insufficient at low speed, the cooling is not uniform and the working noise is large, which does not meet the aviation requirements. Therefore, the two-stroke Aviation Heavy Oil Piston Engine Should Adopt Water Cooling

Compared with the dry cylinder liner, the wet cylinder liner has an airtight water jacket on the cylinder block, which is convenient for casting, easy to disassemble and replace, and has better cooling effect, but only the top and bottom of the cylinder liner are in contact with the cylinder block, so the cylinder liner Poor support rigidity

[0005] The two-stroke aviation heavy oil piston engine has been in a working environment with high mechanical compliance and high friction intensity for a long time. The engine needs both good cooling effect and high system rigidity during operation. Simple dry cylinder liners or wet cylinder liners cannot Meet the use requirements

In addition, the combined combustion chamber based on the screw-in cylinder head has high requirements on the cooling capacity of the fire surface, and the traditional cooling form and method cannot meet the requirements

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