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.
CN107024322AInactive Publication Date: 2017-08-08GENERAL ELECTRIC CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
GENERAL ELECTRIC CO
Publication Date
2017-08-08
Estimated Expiration
Not applicable · inactive patent

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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.
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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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