Cooling water jacket structure of diesel engine cylinder body

Abstract

The invention relates to a cooling water jacket structure of a diesel engine cylinder body. A water inlet channel is disposed at the upper portion of the air inlet side of the cylinder body, a cylinder body water jacket is formed at the middle upper portion of each cylinder of the cylinder body, and the water inlet channel is communicated with the insides of the cylinder body water jackets through water inlet holes. The diesel engine cylinder body cooling water jacket structure is characterized in that the top ends of the cylinder body water jackets upwards extend to be provided with conical cooling water jackets, the conical cooling water jackets are located below cylinder jacket axial location ring support shoulders of cylinders of the cylinder body, the upper ends of the conical cooling water jackets are connected with the cylinder jacket axial location ring support shoulders, and the lower ends of the conical cooling water jackets are connected with water jacket inner cavity inclined planes of the cylinder body water jackets. The height of each conical cooling water jacket should ensure that when a piston is located at a top dead center, the upper ends of the conical cooling water jackets basically align to the top edge of a first piston ring on the piston. The cooling water jacket structure of the diesel engine cylinder body can ensure that when the piston is located at the compression top dead center, the piston, the piston ring and the cylinder jacket can all be cooled effectively, and scuffing of cylinder bore of the cylinder jacket can be prevented.

Description

technical field [0001] The invention relates to an improvement of a diesel engine component, in particular to a cooling water jacket structure for a 480Z and 480ZL series 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 heated - cylinder liner, piston and piston ring, the reasonable arrangement and design of the cooling water jacket structure, as well as the effective organization of the reasonable flow and distribution of the cooling medium, can effectively solve the heat dissipation problem of the heat-loaded parts . [0003] The structure of the cooling water...

AI Technical Summary

Problems solved by technology

This structure does not consider the two-way flow around the water jackets of each cylinder block. The design of a single water inlet will inevitably increase the water flow velocity of the cylinder block water jacket on the exhaust side, while the water flow velocity on the intake side slows down, and the cooling water passing through The water temperature is high and the water volume is small, which causes the local temperature of the cylinder block to be uneven, resulting in thermal deformation, and the roughening or pulling of the cylinder liner

In addition, the axial positioning of the wet cylinder liner of the diesel engine adopts the annular support shoulder, and the support shoulder is thick, and the cooling water jacket cannot extend to the position of the first ring of the piston, which seriously affects the cooling of the first piston ring and the upper part of the cylinder liner. Heat dissipation can easily cause cylinder scuffing and affect the reliability of the whole machine

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