Aero-engine high-pressure fuel and grease heat radiator

The invention discloses an aero-engine high-pressure fuel and grease heat radiator. The heat radiator comprises a double-core-body fuel and grease heat radiator assembly (1), a fuel safety bypass valve (2) and an oil safety bypass valve (3). The high-temperature low-pressure oil flows along a shell pass of the double-core-body fuel and grease heat radiator assembly (1), and a low-temperature high-pressure fuel flows along a tube pass of the double-core-body fuel and grease heat radiator assembly (1). Heat of the oil is taken away by the fuel through heat exchange, so that the high-temperatureoil is cooled. The fuel safety bypass valve (2) and the oil safety bypass valve (3) are only started in the case that an engine fuel system becomes abnormal or an engine oil system becomes abnormal orflowing resistance of the fuel or flowing resistance of the oil of a heat radiator core body is increased during working in alpine region, the fluid does not flow through the heat radiator core body,so that the use safety of an engine is ensured. According to the heat radiator, the structure of the double-core-body fuel and grease heat radiator assembly is mainly designed, so that the effects that the heat exchange efficiency is highest, the structure is the most compact, and the weight is lightest within a certain space and certain size range are achieved, and the use requirements of a newly-developed-model engine can be met.