Water jacket structure of diesel cylinder block

Abstract

The invention relates to a water jacket structure of a diesel cylinder block. The upper portion of an intake side of the cylinder block is provided with a water distributing channel, the front end of which is connected with a water pump and the rear end of which is provided with an engine oil cooler cavity; a cylinder block water jacket is formed at the middle / upper portion of the cylinder block and comprises at least two transversely parallel single water jacket bodies, each of which is provided with an water intake hole and a water drainage hole, the water distributing channel is communicated with the interior of each of the single water jacket bodies through the water intake holes; the water intake hole on the first single water jacket body at the front end of the cylinder block water jacket comprises a front straight water intake hole and a rear straight water intake hole, the water intake holes on other single water jacket bodies each comprise a rear straight water intake hole, wherein all the single water jacket bodies are each provided with an oblique water intake hole except the first single water jacket body, the front straight water intake hole, the rear straight water intake hole and the oblique water intake hole are all tangential to the periphery of the single water jacket bodies. The water jacket structure, skillful and reasonable in structure, can effectively cool the cylinder block and the engine oil, increase the rigidity of the intake side of the cylinder block and lower noise.

Description

technical field [0001] The invention relates to an improvement of a diesel engine component, in particular to a water jacket structure of a diesel engine cylinder block, which belongs to the technical field of mechanical structures. Background technique [0002] During the working process of the internal combustion engine, due to the heat released by the combustion of high-temperature gas, the heat load of the heated parts is very high. In order to ensure that these heated components can work normally, it is very important to solve the heat transfer problem of the heated components. For the key parts that are heated - cylinder block and cylinder head, the structural design of the cooling water jacket can solve their heat transfer problems. [0003] The heat transfer between the cooling medium in the water jacket of the internal combustion engine and the cylinder block-cylinder head wall is relatively complicated, and it is usually divided into four states: convective heat t...

AI Technical Summary

Problems solved by technology

This structure does not consider the two-way flow around each cylinder block water jacket. The design of a single water inlet will inevitably increase the water flow velocity of the cylinder block water jacket on the exhaust side (the direction of the rear end of the engine), while the water flow velocity on the intake side Slow down, resulting in uneven local temperature of the cylinder block, thermal deformation occurs, thus affecting the reliability of the whole machine

[0006] like image 3 , Figure 4 As shown, this kind of water jacket arrangement does not consider the cooling of diesel engine oil, the main oil passage and water passage on the intake side of the cylinder block are separated, which is not compact, and the structural strength of the intake side of the upper part of the cylinder block is weaker than that of the exhaust side, and the assembly deformation Larger; when the engine is running, it may cause defects such as vibration of the whole machine, loud noise, high oil consumption, poor emission and difficulty in sand cleaning, thus affecting the comfort and reliability of the whole machine

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