Novel hollow sodium filled valve

Abstract

The invention provides a novel hollow sodium filled valve. The novel hollow sodium filled valve is composed of a plate part, a rod body and a plug, wherein a hollow part which moves along the axial direction is arranged in the rod body; and the hollow part is filled with metal sodium materials of which the melting point is 97.81 DEG C. When the valve works, the temperature increases rapidly, and the metal sodium is converted from solid into liquid; liquid sodium scours the plate part and the rod body of the valve continuously to transfer the heat of the plate part and the neck part of the valve out rapidly, so that radiation performance of the valve is increased, and temperature can be reduced by about 100 DEG C; besides, the specific gravity of the metal sodium is 0.97 g / cm<3>, so that the weight of the valve is reduced, the mass of the valve is lowered, movement physical quantity correlated with the mass of the valve is reduced correspondingly, and the work performance of the valve is better; furthermore, the valve disclosed by the invention is strong in rigidity and hardly bent.

Description

Technical field [0001] The invention relates to a valve, in particular to a valve filled with sodium in a hollow space, and belongs to the technical field of pneumatic vehicle parts. Background technique [0002] With the development of internal combustion engines in the direction of adjusting high loads, the working temperature of the valve is getting higher and higher, and the working temperature of the exhaust valve is up to 850-900 degrees. The traditional valve can no longer meet the requirements of the internal combustion engine. In order to solve the above technical problems, recently, in order to make the valve can withstand higher temperature during the production of the valve, austenitic material is used in the disc and partial rods of the valve, and the cone surface is welded with cobalt-based alloy. The high temperature resistance, oxidation resistance and corrosion resistance of the valve have been greatly improved, but the structure of the valve at high temperature,...

AI Technical Summary

Problems solved by technology

[0002] With the development of internal combustion engines in the direction of adjusting high loads, the operating temperature of the valve is getting higher and higher, and the operating temperature of the exhaust valve is as high as 850-900 degrees. The traditional valve can no longer meet the requirements of the internal combustion engine.

In order to solve the above technical problems, recently, in the production of valves, in order to make the valves withstand higher temperatures, austenitic materials are used for the discs and partial rods of the valves, and cobalt-based Hexin is surfacing on the conical surface, so that the valves The high temperature resistance, oxidation resistance and corrosion resistance have been greatly improved, but the valve of this structure transmits heat through the valve seat at high temperature, so the heat dissipation performance of the valve is poor.

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