Exhaust-gas turbocharger with divided, variable guide vanes
First Claim
1. An exhaust gas turbo charger for an internal combustion engine, comprising:
- a turbine stage including a turbine rotor rotatable about a turbine rotor axis and including turbine blades mounted on the turbine rotor,an annular double flow spiral guide channel having a first flow channel exhausting radially toward the turbine blades to drive the turbine rotor and a second flow channel exhausting diagonally toward the turbine rotor to drive the turbine rotor,and a variable guide blade cascade assembly for guiding gas flow from the double flow spiral guide channel to the turbine blades, said variable guide blade cascade assembly being a divided guide blade cascade including;
a first stationary guide-blade cascade part including a plurality of first stationary guide-blades interposed between the first flow channel and the turbine blades,a first movable guide-blade cascade part including a plurality of first movable guide blades interposed between the first flow channel and the turbine blades,a second stationary guide-blade cascade part including a plurality of second stationary guide-blades interposed between the second flow channel and the turbine blades, anda second movable guide-blade cascade part including a plurality of second movable guide blades interposed between the second flow channel and the turbine blades,said movable guide-blade cascade parts being rotatable concentrically relative to the turbine rotor axis to thereby adjust flow cross-section for gas supplied from the first and second flow channels to the turbine blades, wherein said first and second movable guide-blade cascade parts are rigidly connected with one another.
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Accused Products
Abstract
An exhaust-gas turbocharger for an internal-combustion engine, the exhaust-gas turbine of which comprises a rotor with an at leash partially diagonal throughflow direction and a spiral guide channel surrounding this and having a mouth region in the form of an angular nozzle, and a variable guide blade cascade with guide blades being arranged in the mouth region. In order to design guide blade cascades with a simpler construction than that of known versions, at the same time with an increase in their operational reliability, according to the invention the guide blades are divided in such a way that they form a divided guide blade cascade with a stationary guide-blade cascade part and with a guide-blade cascade part assigned to this and rotatable concentrically relative to the axis of rotation of the rotor.
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Citations
16 Claims
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1. An exhaust gas turbo charger for an internal combustion engine, comprising:
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a turbine stage including a turbine rotor rotatable about a turbine rotor axis and including turbine blades mounted on the turbine rotor, an annular double flow spiral guide channel having a first flow channel exhausting radially toward the turbine blades to drive the turbine rotor and a second flow channel exhausting diagonally toward the turbine rotor to drive the turbine rotor, and a variable guide blade cascade assembly for guiding gas flow from the double flow spiral guide channel to the turbine blades, said variable guide blade cascade assembly being a divided guide blade cascade including; a first stationary guide-blade cascade part including a plurality of first stationary guide-blades interposed between the first flow channel and the turbine blades, a first movable guide-blade cascade part including a plurality of first movable guide blades interposed between the first flow channel and the turbine blades, a second stationary guide-blade cascade part including a plurality of second stationary guide-blades interposed between the second flow channel and the turbine blades, and a second movable guide-blade cascade part including a plurality of second movable guide blades interposed between the second flow channel and the turbine blades, said movable guide-blade cascade parts being rotatable concentrically relative to the turbine rotor axis to thereby adjust flow cross-section for gas supplied from the first and second flow channels to the turbine blades, wherein said first and second movable guide-blade cascade parts are rigidly connected with one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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Specification