Novel sealing bowl-shaped plug for highly intensified diesel engine

Abstract

The invention discloses a novel sealing bowl-shaped plug for a highly intensified diesel engine. The plug is made of a stainless steel material, the excircle sealing surface of the plug is subjected to a micro taper design, the end face of the plug has an arc shape, and the wall thickness of the section of the plug is reduced and uniform; and the diameter of the excircle surface of the bowl-shaped plug is increased, so that radial interference during installation is increased. The novel bowl-shaped plug is arranged in a taphole of a cylinder cover water jacket of the diesel engine or a gas engine in gluing and pressure interference modes; and the shape and size of the novel bowl-shaped plug are subjected to sealing performance analog computation and verification by a computer, and a reliability test performed by a test machine proves that the novel bowl-shaped plug obviously improves the sealing performance of the taphole of a cylinder cover, meets the requirements of the cylinder cover of the highly intensified diesel engine or the gas engine on a heat load and a mechanical load, and improves the sealing performance and using reliability of the whole engine.

Description

technical field [0001] The invention relates to a novel sealing bowl plug for a high-strength diesel engine. Background technique [0002] Diesel engine is the main component of China's independent research and development of internal combustion power machinery. On the basis of it, various gas engines can be developed with only a small deformation. With the improvement of the power, economy, energy saving and The requirements for environmental protection and reliability are constantly increasing, and the engine needs to be strengthened during the research and development of the model. The increasing gas pressure in the cylinder is used as the main strengthening method, which makes the engine heat load level increase significantly, especially on the cylinder head of the engine. , the bowl-shaped plug is installed on the water plug of the cylinder head, and together with the cylinder head, it bears the alternating thermal load impact and mechanical load. When the bowl-shaped ...

AI Technical Summary

Problems solved by technology

[0004] But the current bowl plugs have the following disadvantages: 1. The bowl plugs of domestic heavy-duty diesel engines are mainly made of copper, considering that copper has good thermal conductivity , the copper bowl-shaped plug installed at the water plug of the cylinder head can better follow the temperature change of the cylinder head, and at the same time conduct heat out

2. The installation of the bowl-shaped plug and the water plug of the cylinder head adopts the interference method, and the size of the interference has a significant impact on the sealing performance. Due to the low Young’s modulus of the copper material, an excessive interference will easily lead to local yielding Formation of installation creases and pits, causing seal failure

Increased wall thickness can increase the rigidity and strength of the structure, but the cost will increase

Images