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System and method for detecting leaks in generators

A technology of generators and detectors, which is applied in the direction of detecting the presence of fluid at the leak point, testing the tightness of the fluid by applying light, and measuring light by using an electric radiation detector.

Inactive Publication Date: 2017-08-08
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Monitoring and detection of potential H 2 Leakage's technical challenge is identifying H in turbogenerators 2 Exact location of spills, especially in inaccessible and space-limited areas

Method used

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  • System and method for detecting leaks in generators
  • System and method for detecting leaks in generators
  • System and method for detecting leaks in generators

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Embodiment Construction

[0111] Aspects of the present disclosure include systems for detecting gas leaks in electric machines (eg, motors or generators) or turbines by introducing an environmentally safe and non-corrosive tracer gas into on-grid or off-grid machines. An infrared imaging device adapted to display images of the escaping tracer gas is provided.

[0112] figure 1 A schematic diagram of a system 10 for detecting gas leaks for use with a machine 15 is shown. Machine 15 may be an electric machine, hydrogen (H 2 ) cooled generators, direct liquid cooled generators, pressurized generators, pressurized gas cooled generators, or pressurized air cooled generators, motors, synchronous condensers, steam turbines or any machinery, sealed vessels, container or box. The phrase "leak detection" includes detecting a leak as well as locating the source of the leak. Leak detection system 10 includes infrared imaging device 20 capable of scanning most or a small portion of machine 15 . Infrared imagi...

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Abstract

A system for detecting a gas leak in a machine includes a source of a non-corrosive tracer gas, and a subsystem for introducing the non-corrosive tracer gas into the machine. An infrared imaging device is adapted to communicate with a notification device to display an image of at least a portion of the machine. The infrared imaging device has a cooled detector and a filter with a spectral response between about 3 [mu]m and about 5 [mu]m. At least one of the detector and the filter is cooled. The infrared imaging device includes one of a mercury cadmium telluride (MCT) photodetector, an indium antimonide (InSb) photodetector or a mid-wavelength quantum well infrared photodetector (QWIP). The notification device is adapted to indicate the gas leak.

Description

technical field [0001] The subject matter disclosed herein relates generally to detection of leaks, and more particularly to on-line detection of coolant leaks in hydrogen cooled electrical generators. Background technique [0002] Large generators are typically cooled with light-density gases. Due to hydrogen (H 2 ), including low windage friction, high heat dissipation capability, and high corona discharge resistance when compared to other cooling gas options, so hydrogen (H 2 ) are widely used as coolants. In addition, H 2 It has the advantage of being readily available and inexpensive. [0003] h 2 Leakage of the generator can prevent the generator from operating efficiently and, in some cases, can produce an outage in power generation. H around generator 2 Among the possible areas of leakage are the flanged joints on the stator housing, which includes the high voltage bushing, seal housing and tube flange. Leaks can also occur around cooler interfaces, welds, bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M3/20G01N21/3504
CPCG01M3/20G01N21/3504G01M3/226G01N2021/3531G01M3/38G01M3/047H02K11/00G01J1/42H02K11/20
Inventor 詹姆斯.君.徐J.J.格兰特
Owner GENERAL ELECTRIC CO
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