An exhaust turbo supercharger is provided that is able to effectively prevent exhaust gas that has flowed into between a turbine housing and a bearing housing from leaking to outside of the device, while allowing an excellent level of workability in assembly and disassembly. Included is a turbine ho
An exhaust turbo supercharger is provided that is able to effectively prevent exhaust gas that has flowed into between a turbine housing and a bearing housing from leaking to outside of the device, while allowing an excellent level of workability in assembly and disassembly. Included is a turbine housing, into which exhaust gas from an internal combustion engine is introduced; a turbine wheel which is provided within the turbine housing and which is rotation-driven by the exhaust gas; a turbine shaft, one end of which is inserted into the turbine housing, and to which the turbine wheel is attached; a bearing which supports the turbine shaft; and a bearing housing which is connected to the turbine housing and inside of which the bearing is housed. A bolt insert hole is formed in the turbine housing, and an internal thread insert made from a heat insulating material is provided in the bolt insert hole, and the turbine housing and the bearing housing are fixed by a bolt that engages with the internal thread insert.
대표청구항▼
The invention claimed is: 1. An exhaust turbo supercharger comprising: a turbine housing, into which exhaust gas from an internal combustion engine is introduced; a turbine wheel disposed within said turbine housing and being rotatably driven by the exhaust gas; a turbine shaft having one end inser
The invention claimed is: 1. An exhaust turbo supercharger comprising: a turbine housing, into which exhaust gas from an internal combustion engine is introduced; a turbine wheel disposed within said turbine housing and being rotatably driven by the exhaust gas; a turbine shaft having one end inserted into said turbine housing, and having said turbine wheel attached thereto; a bearing supporting said turbine shaft; a bearing housing connected to said turbine housing and having said bearing housed inside thereof; and a gasket sealing an area outside in the radial direction of said turbine shaft and between said turbine housing and said bearing housing; wherein a bolt insert hole is disposed in said turbine housing, an internal thread insert made from a heat insulating material is disposed in said bolt insert hole, and said turbine housing and said bearing housing are detachably fixed by a bolt that engages said internal thread insert. 2. An exhaust turbo supercharger comprising: a turbine housing into which exhaust gas from an internal combustion engine is introduced; a turbine wheel disposed within said turbine housing and being rotatably driven by the exhaust gas; a turbine shaft having one end inserted into said turbine housing, and having said turbine wheel attached thereto; a bearing supporting said turbine shaft; a bearing housing connected to said turbine housing and having said bearing housed inside thereof; and a gasket sealing an area outside in the radial direction of said turbine shaft and between said turbine housing and said bearing housing; wherein a through hole having an inner surface is disposed in said turbine housing, said turbine housing and said bearing housing are detachably fixed by a bolt inserted into said through hole, and a nut that engages said bolt; and an insert made from a heat insulating material is disposed between the inner surface of said through hole and said bolt. 3. An exhaust turbo supercharger comprising: a turbine housing into which exhaust gas from an internal combustion engine is introduced; a turbine wheel disposed within said turbine housing and being rotatably driven by the exhaust gas; a turbine shaft having one end inserted into said turbine housing, and having said turbine wheel attached thereto; a bearing supporting said turbine shaft; a bearing housing connected to said turbine housing and having said bearing housed inside thereof; and a gasket sealing an area outside in the radial direction of said turbine shaft and between said turbine housing and said bearing housing; wherein a screw hole is disposed in said turbine housing, said screw hole having a bottom; said turbine housing and said bearing housing are detachably fixed by a bolt that engages said screw hole; a first through hole is disposed in said bolt along the axis of said bolt; and a second through hole that is smaller than the screw hole is disposed on said bottom of said screw hole adjacent said first through hole. 4. An exhaust turbo supercharger comprising: a turbine housing having an inner surface and into which exhaust gas from an internal combustion engine is introduced; a turbine wheel disposed within said turbine housing and being rotatably driven by the exhaust gas; a turbine shaft having one end inserted into said turbine housing, and having said turbine attached thereto; a bearing supporting said turbine shaft; a bearing housing connected to said turbine housing and having said bearing housed inside thereof; and a gasket sealing an area outside in the radial direction of said turbine shaft and between said turbine housing and said bearing housing; wherein a screw hole disposed in said turbine housing; said turbine housing and said bearing housing are detachably fixed by a bolt that engages said screw hole; on the inner surface of said turbine housing in an area in contact with the exhaust gas, a heat shield layer is disposed; and an outer shape of said heat shield layer substantially corresponds to an inner surface shape of a spiral flow passage of said turbine housing. 5. An exhaust turbo supercharger comprising: a turbine housing into which exhaust gas from an internal combustion engine is introduced; a turbine wheel disposed within said turbine housing and being rotatably driven by the exhaust gas; a turbine shaft having one end inserted into said turbine housing, and having said turbine wheel attached thereto; a bearing supporting said turbine shaft; a bearing housing connected to said turbine housing and having said bearing housed inside thereof; and a gasket sealing an area outside in the radial direction of said turbine shaft and between said turbine housing and said bearing housing; wherein a screw hole is disposed in said bearing housing; said turbine housing and said bearing housing are detachably fixed by a bolt that engages said screw hole; and a space chamber is formed around the entire circumference and is enclosed by a radial inner side of said gasket, the bearing housing, and the turbine housing. 6. An exhaust turbo supercharger comprising: a turbine housing, into which exhaust gas from an internal combustion engine is introduced; a turbine wheel disposed within said turbine housing and being rotatably driven by the exhaust gas; a turbine shaft having one end inserted into said turbine housing, and having said turbine wheel attached thereto; a bearing supporting said turbine shaft; a bearing housing connected to said turbine housing and having said bearing housed inside thereof; and a gasket sealing an area outside in the radial direction of said turbine shaft and between said turbine housing and said bearing housing; wherein a screw hole is disposed in said turbine housing; said turbine housing and said bearing housing are detachably fixed by a bolt that engages said screw hole; an elastic member in a state of being compressed in the axial direction of said bolt is disposed between a head section of said bolt and said bearing housing; and a space chamber is formed around the entire circumference and is enclosed by a radial inner side of said gasket, the bearing housing, and the turbine housing. 7. An exhaust turbo supercharger comprising: a turbine housing into which exhaust gas from an internal combustion engine is introduced; a turbine wheel disposed within said turbine housing and being rotatably driven by the exhaust gas; a turbine shaft having one end inserted into said turbine housing, and having said turbine wheel attached thereto; a bearing supporting said turbine shaft; a bearing housing connected to said turbine housing and having said bearing housed inside thereof; and a gasket sealing an area outside in the radial direction of said turbine shaft and between said turbine housing and said bearing housing; wherein a screw hole is disposed in said turbine housing; said turbine housing and said bearing housing are detachably fixed by a bolt that engages said screw hole; in said bearing housing, a bolt support section that receives said bolt is elastically deform in the axial direction of said bolt, and said bolt support section receives said bolt in a state of being elastically deformed to said turbine housing side; and a space chamber is formed around the entire circumference and is enclosed by a radial inner side of said gasket, the bearing housing, and the turbine housing. 8. An exhaust turbo supercharger comprising: a turbine housing into which exhaust gas from an internal combustion engine is introduced; a turbine wheel disposed within said turbine housing and being rotatably driven by the exhaust gas; a turbine shaft, one end of which is inserted into said turbine housing, and to which said turbine wheel is attached; a bearing supporting said turbine shaft; a bearing housing connected to said turbine housing and said bearing housed inside thereof; and a gasket sealing an area outside in the radial direction of said turbine shaft and between said turbine housing and said bearing housing; wherein a screw hole is formed in said turbine housing, a cylindrical male engaging section surrounding said turbine shaft is disposed in said turbine housing, a female engaging section is disposed in said bearing housing, said male engaging section being inserted into said female engaging section, an inner surface of said female engaging section being fitted together with said male engaging section, and said turbine housing and said bearing housing are detachably fixed by a bolt that engages said screw hole, in a state where said male engaging section and said female engaging section are fitted together. 9. An exhaust turbo supercharger comprising: a turbine housing into which exhaust gas from an internal combustion engine is introduced; a turbine wheel disposed within said turbine housing and being rotatably driven by the exhaust gas; a turbine shaft having one end inserted into said turbine housing, and having said turbine wheel attached thereto; a bearing supporting said turbine shaft; a bearing housing connected to said turbine housing and having said bearing housed inside thereof; and a gasket sealing an area outside in the radial direction of said turbine shaft and between said turbine housing and said bearing housing; wherein a screw hole is disposed in said turbine housing, and disposed in the following order toward the radial direction outside of said turbine shaft between said turbine housing and said bearing housing are: a narrow section having a predetermined distance between said turbine housing and said bearing housing; and an expanded section having a predetermined distance between two walls of said turbine housing, the predetermined distance of said expanded section being greater than the predetermined distance of said narrow section; said turbine housing and said bearing housing are detachably fixed by a bolt that engages said screw hole; and in said turbine housing, a bypass flow passage is disposed in said turbine housing, said bypass flow passage connecting the expanded section to an exit of the exhaust gas that is downstream of the turbine wheel.
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Smale Charles H. (Indianapolis IN), Ceramic vane drive joint.
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