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Rotor blade for a rotary machine

A technology of rotor blades and rotating machines, applied in the direction of blade support elements, mechanical equipment, engine manufacturing, etc., to reduce surface stress and reduce stress concentration factors

Inactive Publication Date: 2005-08-03
UNITED TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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Method used

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  • Rotor blade for a rotary machine
  • Rotor blade for a rotary machine
  • Rotor blade for a rotary machine

Examples

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Embodiment Construction

[0034] Figure 1 is a simplified front elevational view of a rotor assembly 10 of a rotary machine having axis Ar. The rotor assembly includes a rotating structure as represented by a disk 12 , and a plurality of outwardly extending rotor blades 14 . Each rotor blade has a root 16 and an airfoil 18 disposed about a spanwise extending axis S commonly referred to as the stack line S. As shown in FIG. The airfoil has a pressure side 24 and a suction side 26 as shown in FIG. 3 . A flow path 22 for working medium gas extends through the rotor blade between the sides of the airfoil.

[0035] The rotor blade has a top region 28 with a top shroud 30 . The top cover comprises a sealing bead 32 which is a face with a radius of curvature around the axis Ar. The top shroud has a transition region 34 extending from the sides 24, 26 of the airfoil, the pressure side 24 as shown by Figures 1, 4 and 5; and the suction side as shown by Figures 4 and 6 26 said. The transition region compris...

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Abstract

A rotor blade (14) having an airfoil (18) and beam construction for a tip shroud (30) is disclosed. Various construction details are developed for providing a transition zone (34) that extend from the sides (26,24) of the airfoil (18) to limit stesses at shroud-airfoil interface, at the disk-root interface and to extend the creep life of the blade while providing a flow path surface of the shroud (30).

Description

technical field [0001] The present invention relates to rotor blades of the type used in industrial gas turbines, and more particularly to the tip region of such rotor blades. Background technique [0002] Aircraft gas turbines have generally smaller rotor blades than those used, for example, in the turbines of industrial gas turbines using steam as the working medium. [0003] Rotor assemblies utilize such blades, such as rotor disks, having a rotating structure including an axis of rotation and a plurality of outwardly extending blades. Each blade is disposed about a radially extending spanwise axis. Typically, the spanwise axis is a radial line called the stack line, which extends outward on a radius of the axis of the rotor blade. A rotor blade has a base, often referred to as a root, which engages the rotating structure at the inner end of the blade. [0004] The rotor blades each have an airfoil extending outwardly from the root across the working medium flow path. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/20F01D5/14F01D11/08
CPCF01D5/143Y02T50/671Y10S416/02Y02T50/673F01D5/147F05B2250/70F05D2260/94F05D2260/941F05D2250/70F05B2250/71F05D2250/71F01D5/225F01D11/08F05D2250/232Y02T50/60
Inventor B·P·杜布E·D·格雷
Owner UNITED TECH CORP
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