Turbocharger

The invention discloses a turbocharger, which belongs to the technical field of engines and comprises a middle shell, an oil inlet pipeline, a turbine shaft, an oil return cavity and a sealing assembly are mounted in the middle shell, and the oil inlet pipeline and the oil return cavity are arranged around the turbine shaft; a gas compressor impeller is installed at one end of the turbine shaft, the sealing assembly is located between the gas compressor impeller and the bearing, a fixed-distance thrust sleeve is installed between the thrust bearing and the turbine shaft, the sealing assembly comprises an oil blocking cover, an oil blocking cover plate and a sealing cover plate which are arranged in an arrayed mode, and a sealing sleeve is arranged between the gas compressor impeller and the fixed-distance thrust sleeve. Therefore, by means of triple sealing of the sealing cover plate, the oil blocking cover plate and the oil blocking cover in the sealing assembly, the problem of lubricating oil seepage is rel