Turbocharger water-cooled bearing housing

Claim 1

A turbocharger comprising: a compressor section provided with a fluid medium inlet, a fluid medium outlet, an annular discharge passage communicating therebetween and a compressor impeller mounted on one end of a shaft; a turbine section provided with a fluid medium inlet, a fluid medium outlet, an annular inlet passage communicating therebetween and a turbine impeller mounted on the opposite end of said shaft; and a bearing housing, intermediate said compressor section and said turbine section, provided with a lubricating oil inlet passage, means for introducing oil around said shaft, a recess for collecting said oil, and means for discharging said oil, said turbine section clamped to one side of said bearing housing, and means provided between said bearing housing and said compressor section and between said bearing housing and said turbine section for minimizing leakage of oil therebetween; characterized by a multiple piece die cast bearing housing including said means for introducing oil around said shaft, and at least one water cooling channel including a pair of concentric rings defining an oute rring and an inner ring, said water cooling channel open on at least one side of said compressor section and/or said turbine section, said corresponding section provided with at least one seal plate mounted on said at least one side between said section and said bearing housing, said pair of concentric rings in combination with said seal plate providing a means for preventing leakage between, (1) said water cooling channel and said means for introducing oil around said shaft, said water channel being fluidly isolated from said means for introducing said oil, said inner ring having an inner wall defining said recess for collecting said oil, and (2) said water cooling channel and the environment external said turbocharger, said seal plate mounted to said die cast bearing housing by bolting means passing through said turbine section.