Oil cooler of air cooled engine

Abstract

The invention discloses an oil cooler of air cooled engine. The oil cooler is a condenser arranged at the air inlet part of an engine air guide cover; an oil inlet tube and an oil outlet tube of the condenser are arranged in a U shape; and a thermal insulation layer is arranged between the oil inlet tube and the oil outlet tube of the condenser. According to the invention, a thermal insulation layer obstructs the direct thermal conduction between the oil inlet tube and the oil outlet tube, and the heat transfer efficiency is improved. through the invention, the problem that the direct thermal conduction between the oil inlet tube and the oil outlet tube reduces the heat exchange efficiency is solved; the oil temperature at the outlet is guaranteed; and the cooling effect is good as the thermal conduction between the oil inlet tube and the oil outlet tube is reduced, the space of the shell is reasonably utilized, and the tangential air of a fan flywheel is fully used.

Description

technical field [0001] The invention relates to an external engine oil condenser at an air inlet of an air-cooled engine. Background technique [0002] The air-cooled engine adopts natural air intake and forced cooling. It mainly uses the fan blades installed on the flywheel to generate wind pressure to cool the engine when the engine is running. Usually, the oil temperature (heat load) of the air-cooled engine only uses the cooling fins and heat sinks of the engine itself. The heat transfer of the body performs heat exchange to control the temperature of the engine oil. However, when the power is enhanced, the heat load of the engine will be very high, causing the temperature of the engine oil to rise sharply. When the temperature of the engine oil rises above 120°C, the lubrication kinematic viscosity of the oil The sharp drop requires timely heat dissipation to ensure the continuous operation of the engine in good condition and long service life. [0003] Before the pres...

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Problems solved by technology

[0003] Before the present invention was made, in the prior art, after the lubricating oil was cooled, the problem of maintaining the temperature after cooling was often ignored. Generally, double rows of oil pipes in and out of the condenser were used, and they were in direct contact, which caused the problem of heat transfer short circuit, directly Affect the oil outlet temperature, greatly reducing the heat transfer efficiency

The above-mentioned lubricating oil cooling method is difficult to achieve a good cooling effect, and then the poor cooling effect of the lubricating oil will often cause the engine temperature to rise, the output power will drop, and it is easy to cause failures such as pulling tiles and cylinders, and the engine reliability cannot be guaranteed.

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