Radial turbine
First Claim
1. A radial turbine comprising a plurality of nozzle vanes disposed along a circumferential direction inside a spiral scroll and configured to regulate a flow of a working gas from the scroll to a rotor blade of a turbine rotor, each of said plurality of nozzle vanes being configured to be rotatable around a support axis mounted to a body of the nozzle vane as a rotational axis,wherein each of the plurality of nozzle vanes includes,an inlet leading edge portion;
- an outlet trailing edge portion;
a leading edge central portion formed on a central portion in a width direction of the inlet leading edge portion, the leading edge central portion having two end portions;
a leading edge bulging portion formed on both end portions on an end side of the leading edge central portion in the width direction of the inlet leading edge portion, the leading edge bulging portion being bulged toward an outer surface side of the nozzle vane relative to the leading edge central portion;
a trailing edge central portion formed on a central portions in a width direction of the outlet trailing edge portion, the trailing edge central portion having two end portions; and
a trailing edge bulging portion formed on both end portions on an end side of the trailing edge central portion in the width direction of the outlet trailing edge portion, the trailing edge bulging portion being bulged toward the outer surface side of the nozzle vane relative to the trailing edge central portion,wherein a width of the leading edge bulging portion is set to be within a range of from 15 to 20% relative to an entire width of the nozzle vane, andwherein a width of the trailing edge bulging portion is set to be within the range of from 15 to 20% relative to the entire width of the nozzle vane.
1 Assignment
0 Petitions
Accused Products
Abstract
A radial turbine comprises a plurality of nozzle vanes disposed along a circumferential direction inside a spiral scroll and configured to regulate a flow of a working gas from the scroll to a rotor blade, wherein each of the nozzle vane includes a leading edge bulging portion on both end portions in a width direction of an inlet leading edge portion, the leading edge bulging portion being bulged toward a pressure face side of the nozzle vane relative to a central portion, so that a vane angle is configured to correspond with an inflow angle of the working gas to be flown into the nozzle vane, and wherein each of the nozzle vane includes a trailing edge bulging portion on both end portions in a width direction of an outlet trailing edge portion, the trailing edge bulging portion being bulged toward the pressure face side relative to a central portion, so that an outflow angle of the working gas from the outlet trailing edge of the nozzle vane becomes uniform.
14 Citations
7 Claims
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1. A radial turbine comprising a plurality of nozzle vanes disposed along a circumferential direction inside a spiral scroll and configured to regulate a flow of a working gas from the scroll to a rotor blade of a turbine rotor, each of said plurality of nozzle vanes being configured to be rotatable around a support axis mounted to a body of the nozzle vane as a rotational axis,
wherein each of the plurality of nozzle vanes includes, an inlet leading edge portion; -
an outlet trailing edge portion; a leading edge central portion formed on a central portion in a width direction of the inlet leading edge portion, the leading edge central portion having two end portions; a leading edge bulging portion formed on both end portions on an end side of the leading edge central portion in the width direction of the inlet leading edge portion, the leading edge bulging portion being bulged toward an outer surface side of the nozzle vane relative to the leading edge central portion; a trailing edge central portion formed on a central portions in a width direction of the outlet trailing edge portion, the trailing edge central portion having two end portions; and a trailing edge bulging portion formed on both end portions on an end side of the trailing edge central portion in the width direction of the outlet trailing edge portion, the trailing edge bulging portion being bulged toward the outer surface side of the nozzle vane relative to the trailing edge central portion, wherein a width of the leading edge bulging portion is set to be within a range of from 15 to 20% relative to an entire width of the nozzle vane, and wherein a width of the trailing edge bulging portion is set to be within the range of from 15 to 20% relative to the entire width of the nozzle vane. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A plurality of nozzle vanes disposed along a circumferential direction inside a spiral scroll and configured to regulate a flow of a working gas from the scroll to a rotor blade of a turbine rotor, each of said plurality of nozzle vanes being configured to be rotatable around a support axis mounted to a body of the nozzle vane as a rotational axis,
wherein each of the plurality of nozzle vanes includes, an inlet leading edge portion; -
an outlet trailing edge portion; a leading edge central portion formed on a central portion in a width direction of the inlet leading edge portion, the leading edge central portion having two end portions; a leading edge bulging portion formed on both end portions on an end side of the leading edge central portion in a width direction of the inlet edge portion, the leading edge bulging portion being bulged toward an outer surface of the nozzle vane relative to the leading edge central portion; a trailing edge central portion formed on a central portion in a width direction of the outlet trailing edge portion, the trailing edge central portion having two end portions; and a trailing edge bulging portion formed on both end portions on a side of the trailing edge central portion in the width direction of the outlet trailing edge portion, the trailing edge bulging portion being bulged toward the outer surface side of the nozzle vane relative to the trailing edge central portion, wherein a width of the leading edge bulging portion is set to be within a range of from 15 to 20% relative to an entire width of the nozzle vane, and a width of the trailing edge bulging portion is set to be within a range of from 15 to 20% relative to an entire width of the nozzle vane.
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Specification