Turbine bucket having outlet path in shroud

Patent metadata

Field	Value
Publication number	US-10508554-B2
Application number	US-201514923693-A
Country	US
Kind code	B2
Filing date	Oct 27, 2015
Priority date	Oct 27, 2015
Publication date	Dec 17, 2019
Grant date	Dec 17, 2019

Abstract

A turbine bucket according to embodiments includes: a base; a blade coupled to base and extending radially outward from base, blade including: a body having: a pressure side; a suction side opposing pressure side; a leading edge between pressure side and suction side; and a trailing edge between pressure side and suction side on a side opposing leading edge; and a plurality of radially extending cooling passageways within body; and a shroud coupled to blade radially outboard of blade, shroud including: a plurality of radially extending outlet passageways fluidly connected with a first set of the plurality of radially extending cooling passageways within body; and an outlet path extending at least partially circumferentially through shroud and fluidly connected with all of a second, distinct set of the plurality of radially extending cooling passageways within body.

First claim

What is claimed is:

1. A turbine bucket comprising:
a base;
a blade coupled to the base and extending radially outward from the base, the blade including:
a body having:
a pressure side; a suction side opposing the pressure side; a leading edge between the pressure side and the suction side; and a trailing edge between the pressure side and the suction side on a side opposing the leading edge; and

a plurality of radially extending cooling passageways within the body; and
a shroud coupled to the blade radially outboard of the blade, the shroud including:
an outlet path extending at least partially circumferentially through the shroud and fluidly connected with all of the plurality of radially extending cooling passageways within the body, wherein the outlet path exits the blade only at a trailing half of the shroud at the trailing edge of the body, wherein an entirety of a cooling fluid passing through the plurality of radially extending cooling passageways within the body exits the body through the outlet path.

2. The turbine bucket of claim 1 , wherein the shroud includes a notch between the leading edge and the trailing edge of the body.

3. The turbine bucket of claim 1 , wherein the outlet path includes at least one rib/guide vane proximate the trailing edge for guiding a flow of cooling fluid exiting the body.

4. The turbine bucket of claim 1 , wherein the outlet path includes a chamber extending from the leading edge to the trailing edge.

5. A turbine bucket comprising:
a base;
a blade coupled to the base and extending radially outward from the base, the blade including:
a body having:
a pressure side; a suction side opposing the pressure side; a leading edge between the pressure side and the suction side; and a trailing edge between the pressure side and the suction side on a side opposing the leading edge; and

a shroud coupled to the blade radially outboard of the blade, the shroud including:
a notch between a leading half and a trailing half of the shroud;
a first plurality of radially extending cooling passageways within the body on the leading half of the shroud;
a first outlet path extending radially through the shroud on the leading half of the shroud, wherein an entirety of a cooling fluid passing through the first plurality of radially extending cooling passageways exits the first outlet path;
a second plurality of radially extending cooling passageways within the body on the trailing half of the shroud; and
a second outlet path extending at least partially circumferentially through the trailing half of the shroud, and fluidly connected with the second plurality of radially extending cooling passageways within the body, wherein the second outlet path exits the blade only at the trailing half of the shroud, and wherein an entirety of a cooling fluid passing through the second plurality of radially extending cooling passageways exits the body through the second outlet path.

6. The turbine bucket of claim 5 , wherein the second plurality of radially extending cooling passageways extend from the body to the second outlet path, and wherein the body further includes at least one rib/guide vane proximate the trailing edge for guiding a flow of cooling fluid exiting the body through the second outlet path.

Assignees

• Gen Electric

Inventors

• Chouhan Rohit
• Jaiswal Shashwat Swami
• Siden Gunnar Leif
• Taylor Zachary James

Classifications

• F01D1/32 Primary

  with pressure velocity transformation exclusively in rotor, e.g. the rotor rotating under the influence of jets issuing from the rotor, {e.g. Heron turbines (the working fluid being a combustion products F02C3/165; jet propulsion plants per se F02K)} · CPC title

• F05D2240/30

  Characteristics of rotor blades, i.e. of any element transforming dynamic fluid energy to or from rotational energy and being attached to a rotor · CPC title

• F01D5/225

  by shrouding · CPC title

• F01D5/187 Primary

  Convection cooling · CPC title

• F01D5/18

  Hollow blades, {i.e. blades with cooling or heating channels or cavities (structure of hollow blades in general F01D5/147)}; Heating, heat-insulating or cooling means on blades · CPC title