Heat insulating coating

Abstract

The invention relates to the technical field of heat transferring, in particular to a heat insulating coating. The heat insulating coating comprises a heat insulating layer and a heat isolating layer. One side of the heat isolating layer is connected with the inner surface of a piston combustion chamber, and the other side of the heat isolating layer is coated with the heat insulating layer. The heat isolating layer comprises a foam metal framework and stuffing. Holes of the foam metal framework are filled with the stuffing. The inside porous structure of the foam metal framework of the heat isolating layer is arranged and used, and the stuffing with the characteristics of low heat conductivity and low heat capacity is fixed in the holes, so that the heat insulating coating has the good following performance to the environment, the negative effects of the continuous high-temperature surfaces of common heat insulating materials to the air exchange process are overcome, the requirement that the heat insulating coating of which the coating surface temperature is capable of rapidly adapting to environment changes of an internal combustion engine working in an intermittent mode is met, heat carried away by internal combustion engine cooling is reduced, the heat loss in the combustion chamber is reduced, the heat efficiency of the internal combustion engine is improved, and the air inlet amount and power output of the internal combustion engine are ensured; and the foam metal framework is used by the heat isolating layer, the heat load of high temperature parts is reduced, and the service life of the internal combustion engine is prolonged.

Description

technical field [0001] The invention relates to the technical field of heat transfer, in particular to a heat insulating coating. Background technique [0002] Internal combustion internal combustion engine is a kind of thermal internal combustion engine, which uses the heat energy emitted by the combustion of fuel in the cylinder, and uses gas as the medium (referred to as working fluid) to convert heat energy into mechanical energy. Existing internal combustion engine cylinder combustion chambers are all made of cast iron as the medium, so that the interface contacting with high-temperature gas has a large amount of heat transfer (the thermal conductivity of cast iron is 54 kcal / m.h.degrees), and the cooling heat loss value is high. The exhaust temperature is as high as 700°K, which is another major way of heat loss. In the case of compression ratio 1:8 (gasoline internal combustion engine) and 1:20 (diesel internal combustion engine), the high temperature gas in the power...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to solve the problem that the existing heat insulation coating makes the temperature of the piston combustion chamber too high during the working process, which has a bad influence on the ventilation process, and then leads to the problem that the power of the internal combustion engine is reduced

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