초록 ▼

A turbocharger including a sealing device for prevention of fluid leakage from high to low pressure sides through a radially extending annular gap formed between a shroud and a shroud-confronting portion which constitute the turbocharger is provided. The sealing device includes a frustoconical disc

A turbocharger including a sealing device for prevention of fluid leakage from high to low pressure sides through a radially extending annular gap formed between a shroud and a shroud-confronting portion which constitute the turbocharger is provided. The sealing device includes a frustoconical disc spring seal member arranged in a pressed manner in the gap between the shroud and the shroud-confronting portion. Accordingly, fluid leakage from high to low pressure sides through an annular gap formed between constructional members of a turbocharger and extending radially of a turbine shaft may be prevented.

대표청구항 ▼

1. A turbocharger with a sealing device for prevention of fluid leakage from high to low pressure sides through an annular gap formed between first and second members constituting the turbocharger and extending radially of a turbine shaft, wherein said first member is a shroud fixed to a bearing hou

1. A turbocharger with a sealing device for prevention of fluid leakage from high to low pressure sides through an annular gap formed between first and second members constituting the turbocharger and extending radially of a turbine shaft, wherein said first member is a shroud fixed to a bearing housing and said second member is shroud-confronting portion formed on a turbine housing with the gap therebetween, said sealing device comprising a disc spring seal member which is frustoconical and is arranged in the gap between said shroud and shroud-confronting portion, an annular step being formed on an inner periphery of said shroud-confronting portion, a riser portion formed at the inner peripheral end of the seal member being mounted with press-in said step, and an outer peripheral end of the seal member being pressed against the shroud. 2. A turbocharger with a sealing device for prevention of fluid leakage from high to low pressure sides through an annular gap formed between first and second members constituting the turbocharger and extending radially of a turbine shaft, wherein said first and second members comprises a heat shield plate fixed to a shroud and a heat-shield-plate-confronting portion formed on a bearing housing, respectively, with the gap therebetween;said sealing device comprises a disc spring seal member which is frustoconical and is arranged in the gap between said heat shield plate and said heat-shield-plate-confronting portion,said heat-shield-plate-confronting portion being formed with an axial annular projection to provide an annular step on a periphery of said annular projection, anda curved section formed at an inner peripheral end of the seal member is mounted with press-in said step, and an outer peripheral end of the seal member is pressed against the heat shield plate. 3. The turbocharger as claimed in claim 2, wherein the outer peripheral end of the seal member presents a curved section.