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AssigneeMitsubishi Heavy Industries, Ltd.
InventorsKatsuyuki Osako, Shozo Maekawa, Motoki Ebisu, Ryoji Utsumi, Takashi Mikogami
Estimating the term…
The improvements are made in the turbine scroll and the turbine blades. The scroll structure for the radial turbines is characterized by the foregoing scroll having a scroll width ratio between the width in the radial direction (ΔR) and the width in the direction of the rotation (B) ranging from ΔR/B=0.3 to 0.7. It is further characterized by the configuration in which the turbine blades have cut-away areas at the blade corners by a prescribed amount, which are provided on the inlet edge at the shroud side and hub side where the operating gas flows.
A structure of a turbine scroll used in a radial turbine in which the operating gas flows through a vortex-shaped scroll formed inside a turbine casing to turbine blades of the turbine rotor positioned inside said turbine scroll, flowing into said blades in a radial direction to rotate the turbine rotor before flowing out, in the axial direction, wherein said turbine scroll has a scroll width ratio ΔR/B between the width in the radial direction (ΔR) and the width in the direction of the rotation (B) ranges between 0.3 and 0.7.
A structure of a turbine scroll used in a radial turbine in which the operating gas flows through a vortex-shaped scroll formed inside the turbine casing to the turbine blades of the turbine rotor positioned inside said turbine scroll, flowing into said blades in a radial direction to rotate the turbine rotor before flowing out in the axial direction, wherein the sectional area of the flow path at the downstream right after the tongue, formed at the inner circumference of a gas inlet is formed partially smaller than the sectional area of the flow path at the tongue edge by narrowing in the width direction in an amount corresponding to the thickness (T) dimension of the tongue.
A structure of turbine blades used in a radial turbine in which the operating gas flows through a vortex-shaped scroll formed inside the turbine casing to the turbine blades of the turbine rotor positioned inside said turbine scroll, flowing into said blades in the radial direction to rotate the turbine rotor before flowing out in the axial direction, wherein said turbine blades have cut-away areas at the blade corners by a prescribed amount, which are provided on the inlet edge at the shroud side and hub side where the operating gas flows.
Dependencies are inferred from the claim text.