Generator stator bar temperature sensor easy to replace and use method thereof

Abstract

The invention provides an easy-to-replace generator stator bar temperature sensor and a use method thereof, the easy-to-replace generator stator bar temperature sensor comprises a sensor, a guide tube and a sensor protection shell, the sensor is composed of a connector, a transmission cable and a temperature sensing probe, and the two ends of the transmission cable are connected with the connector and the temperature sensing probe respectively; the end, connected with the temperature sensing probe, of the transmission cable is sleeved with a guide pipe, a sensor protection shell is arranged outside one end of the guide pipe and installed between layers of the generator stator bar, and the other end of the guide pipe is led out from the top end of an interlayer filler strip of the generator stator bar. The generator stator bar temperature monitoring device has the advantages that the guide pipe is arranged between bar layers in advance through the sensor protection shell during generator production, after generator production is completed, the sensor is arranged in the guide pipe to achieve temperature monitoring of a generator stator bar, when the sensor needs to be replaced, the bar does not need to be disassembled, and the cost is reduced. The sensor can be directly replaced by using a simple tool, and the temperature measurement performance and the use habit are not changed after replacement.

Description

【Technical field】 [0001] The invention relates to a temperature sensor, in particular to an easily replaceable generator stator bar temperature sensor and its application method. 【Background technique】 [0002] The loss during the operation of the generator (such as the copper loss of the wire rod, the iron core loss, and the friction loss of the bearing bush) will be expressed in the form of heat. The heat will increase with the increase of the load. Excessive temperature will not only reduce the equipment The service life is also the main reason for abnormal accidents. Therefore, real-time monitoring of the operating temperature of the equipment is the main means to measure the operating status of the equipment and regulate the load. The stator bar is the most core and must-test position. [0003] The existing method of monitoring the temperature of the stator wire rods is to use a resistive temperature sensor based on an electrical signal, and there is also an attempt to ...

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Problems solved by technology

[0003] The existing method of monitoring the temperature of the stator wire rods is to use a resistive temperature sensor based on an electrical signal, and there is also an attempt to use an optical fiber temperature sensor based on an optical signal. The interlayer spacer is replaced with a spacer with a built-in temperature sensor. This method can effectively monitor the real-time temperature of the stator bar during operation, but there is a serious problem in this method: once the sensor is arranged, whether it is in production or the equipment is put into operation Finally, it is very troublesome to replace the temperature sensor. It is necessary to remove all the components around the fixed sensor before the sensor can be taken out and replaced. The whole process is almost to disassemble the entire generator and reinstall it. Disassembly and assembly will cause certain damage to the generator, and may also bring new safety hazards. Therefore, when the temperature sensor at some position of the generator stator is damaged, the user generally chooses not to replace it, and does not monitor the temperature at this position, so that Equipment running with hidden dangers

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