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Rotor rim impingement cooling

A technology of turbine blades and turbine impellers, applied in the directions of blade support elements, machines/engines, engine functions, etc., to solve problems such as increased air temperature in the impeller space, hot exhaust leakage, etc.

Inactive Publication Date: 2016-06-01
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hot exhaust gas can still leak into the wheel space, causing an increase in the temperature of the wheel space air and raising the temperature of the impeller above the maximum allowable temperature of the impeller material

Method used

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  • Rotor rim impingement cooling
  • Rotor rim impingement cooling
  • Rotor rim impingement cooling

Examples

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Embodiment Construction

[0032] As is generally known, a turbine blade is also called a turbine bucket or a rotor blade; an impeller is also called a turbine wheel; the shaft portion of a turbine blade is also called a neck portion; The dovetail of the turbine blade; and the rim clearance is also known as the edge post clearance. In the context of these specifications, the word "about" includes 10% above and below the range described by the numerical value.

[0033] figure 1 A portion of turbine blade 100 is shown positioned on turbine wheel 200 and engaged with wheel post 190 . Turbine blade 100 has airfoil 102 , platform 104 , shank portion 106 and root portion 108 . The shaft portion 106 may include axially extending angel wings 112 or any suitable type of seal on the shaft portion 106 . Turbine blade 100 includes at least one internal cooling channel 110 located inside blade 100 such that internal cooling channel 110 supplies cooling flow 122 to turbine blade 100 through openings 120 located on...

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PUM

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Abstract

A system and method of cooling a radially outer surface of a rotor wheel post of a turbine wheel and a rotor wheel space between a turbine bucket and a rotor wheel post, including a turbine bucket having at least one cooling passage that extends between an inner cooling channel of the turbine bucket and an outer surface of a shank portion of the turbine bucket that directly faces a radially upper surface of the rotor wheel post, and using the cooling passage to direct cooling flow towards the radially upper surface of the rotor wheel post.

Description

technical field [0001] The present invention relates to a system and method for cooling a rotor rim inside a gas turbine, and in particular to rotor rim cooling utilizing cooling passages in turbine blades. Background technique [0002] A gas turbine includes an inlet section, a compressor section, a turbine section, a combustion section, and an exhaust section. During operation, the gas turbine draws in ambient air, for example, through an inlet section, the air is compressed by a compressor section, and the air is supplied to a combustion section to generate hot exhaust gases. The hot exhaust is fed downstream toward a turbine section that absorbs energy from the exhaust to mechanically drive the compressor section and generate power that may be provided as, for example, electricity. [0003] The turbine section includes at least one rotor assembly including a plurality of turbine blades circumferentially spaced in and engaged in slots on a wheel formed by a plurality of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D5/18
CPCF01D5/18F01D5/081F01D5/3007F05D2260/201
Inventor D.R.约翰斯M.J.费多尔A.P.吉亚梅塔
Owner GENERAL ELECTRIC CO