Apparatus and method for monitoring compressor clearance and controlling a gas turbine

A technology for gas turbines and compressors, which is applied to gas turbine devices, jet propulsion devices, pump control, etc., and can solve problems such as low efficiency

Inactive Publication Date: 2009-02-18
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Gap targeting can cause inefficiencies during certain operating modes due to the need to accommodate this error and operating conditions
For example, the duration for start-up may have to be long enough to ensure proper heating of the compressor to avoid friction

Method used

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  • Apparatus and method for monitoring compressor clearance and controlling a gas turbine
  • Apparatus and method for monitoring compressor clearance and controlling a gas turbine
  • Apparatus and method for monitoring compressor clearance and controlling a gas turbine

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Embodiment Construction

[0016] The present teachings provide embodiments of apparatus and methods for monitoring clearances between a plurality of compressor blades and a casing in a gas turbine. The present teachings provide for measuring clearances during gas turbine operation and controlling parameters of the gas turbine based on the measured clearances. The parameters are controlled in such a way as to provide a higher efficiency in the operation of the gas turbine than would be obtained without the device and method.

[0017] Typically, the gap is measured with a sensor that provides gap-related information to a control system. A control system, which may be included within a gas turbine engine controller, receives the information and controls certain parameters of the gas turbine based on the information. Two examples of controlled parameters are inlet intake heated air and fuel flow. Before proceeding to a detailed discussion of the embodiments, certain definitions are provided.

[0018] Th...

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Abstract

The invention relates to a device for monitoring clearance of a compressor and controlling a gas turbine and a method. The gas turbine includes a compressor (2), the gas turbine including a sensor (22) for measuring a clearance (20) of blades (27) in the compressor (22); and a controller (41) for receiving clearance (20) information and using the information to control the gas turbine (1) for prevention of at least one of a surge and rubbing of the blades (27).

Description

technical field [0001] The invention disclosed herein relates to the field of gas turbines, and more particularly to improving the efficiency of gas turbines. Background technique [0002] A gas turbine consists of many components, each of which can expand or contract as operating conditions change. A gas turbine includes a compressor that compresses air for combustion in a combustor. A compressor uses compressor blades to compress air. [0003] The shape of the compressor blades is usually airfoil. The compressor blades rotate within a housing, which has a circular shape. As the compressor blades rotate, the compressor blades use their airfoil shape to compress the air within the casing. The compressor blades and casing are used to contain the compressed air. [0004] The distance between the outer tips of the compressor blades and the casing is called the "clearance". As the clearance increases, the efficiency of the compressor decreases due to increased mixing losse...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02C9/00F02C9/28F02C7/057F02C9/50
CPCF04D27/0207F04D27/001
Inventor R·T·萨切尔S·D·德拉佩尔E·K·鲍克奈特H·L·小乔丹
Owner GENERAL ELECTRIC CO
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