CN204043820U - A kind of electricity generator stator core system for detecting temperature based on Fibre Optical Sensor - Google Patents
A kind of electricity generator stator core system for detecting temperature based on Fibre Optical Sensor Download PDFInfo
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- CN204043820U CN204043820U CN201420474965.XU CN201420474965U CN204043820U CN 204043820 U CN204043820 U CN 204043820U CN 201420474965 U CN201420474965 U CN 201420474965U CN 204043820 U CN204043820 U CN 204043820U
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- stator core
- optical sensor
- monitoring point
- fibre optical
- electricity generator
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Abstract
The utility model discloses a kind of electricity generator stator core system for detecting temperature based on Fibre Optical Sensor.Electricity generator stator core external cylindrical surface has spiral slot, optical fiber to be arranged in spiral slot and to be sealed by seal, the seal at spiral slot two ends is provided with monitoring point opening, seal is provided with a monitoring point opening along stator core short transverse interval phase co-altitude, and optical fiber is at each monitoring point opening part thermometric.The utility model adopts screw type Fibre Optical Sensor, three-dimensionally can present the Temperature Distribution of stator differing heights comprehensively; And system electrical insulation capability is good, antijamming capability is strong, highly sensitive.
Description
Technical field
The utility model relates to a kind of system for detecting temperature, is specifically related to a kind of electricity generator stator core system for detecting temperature based on Fibre Optical Sensor.
Background technology
Domestic and international generator, because parts heating causes structural member gross distortion, cause unit vibration, the situation jeopardizing motor security of operation happens occasionally.Therefore, accurately detect and research motor each parts temperature rise situation, will for motor from now on efficiently, safe and stable operation established solid foundation.The structure of generator is very complicated, adds the effect that rotor rotates, makes the nowed forming of gas between rotor or in stators and rotators become very complicated.GB/T 7894-2009 specifies, the temperature rise value that hydraulic generator stator core allows is: B level 85 DEG C, F level 105 DEG C.Therefore, be operation state of generator whether one of normal important symbol to the detection of generator unit stator temperature.
The patent No. is " the wind power generating set fire monitoring system based on Fibre Optical Sensor " introduction of 201110409944.0, comprising: detection module, signal processing module, control treatment module and monitoring module; Described detection module comprises one or more detection channels, and this detection channels is Fibre Optical Sensor; Described signal processing module is the processing enter of detecting module image data, is detection main frame; Described detection main frame is connected with one or more Fibre Optical Sensor; Described control treatment module is fire processing controls center, comprises PC, communication module, fire alarm control unit, fire extinguishing system and picture control equipment; Described detection main frame is connected with PC, picture control equipment and fire alarm control unit respectively; The detection of current stator core temperature is mainly by thermometry meter method, but the temperature recorded is more on the low side than actual temperature majority, and numerical value on the low side is also random and different.
Current thermometry probe and described Fibre Optical Sensor are commonly arranged on the axially same of stator core equably, three-dimensionally can not present the Temperature Distribution of stator core differing heights comprehensively, when temperature anomaly causes generator malfunction, can not display alarm effectively and timely.
Summary of the invention
In order to solve Problems existing in background technology, the purpose of this utility model is to provide a kind of electricity generator stator core system for detecting temperature based on Fibre Optical Sensor, and system electrical insulation capability is good, antijamming capability is strong, highly sensitive.Adopt screw type fiber arrangement mode, can in addition corresponding detection method, thus the temperature variation of timely and effective reflection stator core, prevention generator overheating is damaged there is good prospect.
The utility model will solve the problems of the technologies described above adopted technical scheme and comprise:
The stator core of generator is installed with Fibre Optical Sensor, and the detection signal of Fibre Optical Sensor obtains stator core temperature signal by signal processing module, and stator core temperature signal is input to warning device; It is characterized in that: have around the stator core spiral slot of a week on electricity generator stator core external cylindrical surface, optical fiber to be arranged in spiral slot and to be sealed by seal, the seal at spiral slot two ends is provided with monitoring point opening, seal is provided with a monitoring point opening along stator core short transverse interval phase co-altitude, and optical fiber is at each monitoring point opening part thermometric.
Described monitoring point opening add up to 6 ~ 15.
The fiber windings length of described each monitoring point opening part is greater than 3m.
Described signal processing module is demodulator of PM signal PM.
The beneficial effects of the utility model are as follows:
1, adopt screw type Fibre Optical Sensor, three-dimensionally can present the Temperature Distribution of stator core differing heights comprehensively.
2, the utility model can adopt different grades to distinguish to the operation of generator under different situation and treat, and crosses cause thermal damage have good prospect for prevention stator core.
3, the utility model system electrical insulation capability is good, and antijamming capability is strong, highly sensitive.
Accompanying drawing explanation
Fig. 1 is device connection diagram of the present utility model.
Fig. 2 is the structural representation that the utility model optical fiber is arranged on stator core.
Fig. 3 is the optical fiber mounting structure schematic diagram of the utility model from stator core axial section.
Fig. 4 is the structural representation of the utility model at monitoring point opening part.
In figure: 1, monitoring point, 2, optical fiber, 3, spiral slot, 4, stator core, 5, seal.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further described.
As shown in Fig. 1 ~ Fig. 2, the utility model comprises: the stator core 4 of generator is installed with Fibre Optical Sensor, the detection signal of Fibre Optical Sensor obtains stator core temperature signal by signal processing module, and stator core temperature signal is input to warning device; As shown in Figure 2, electricity generator stator core 4 external cylindrical surface has around the stator core spiral slot of 4 one weeks 3, as shown in Figure 3, optical fiber 2 to be arranged in spiral slot 3 and to be sealed by seal 5, as shown in Figure 4, the seal 5 at spiral slot 3 two ends is equipped with monitoring point 1 opening, seal 5 between monitoring point 1 opening at spiral slot two ends is provided with monitoring point 1 opening along stator core 4 short transverse at interval of phase co-altitude h, optical fiber 2 is wound around at each monitoring point 1 place, optical fiber 2, at each monitoring point 1 opening part thermometric, forms Fibre Optical Sensor thus.
This Fibre Optical Sensor is distributed optical fiber temperature sensor.
Preferred monitoring point 1 opening add up to 6 ~ 15, make the angle formed between arbitrary neighborhood two monitoring points 1 to the projection and the stator core bottom surface center of circle of stator core 4 bottom surface be acute angle.
The optical fiber 2 pitch of the laps length of each monitoring point 1 opening part is greater than 3m.
Preferred signal processing module is demodulator of PM signal PM.
Above-mentioned seal 5 is the spirality block with stator core same material.
The utility model can adopt following methods to detect:
1) adopt following systems axiol-ogy: the stator core 4 of generator is installed with Fibre Optical Sensor, the detection signal of Fibre Optical Sensor obtains stator core temperature signal by signal processing module, and stator core temperature signal is input to warning device; Electricity generator stator core 4 external cylindrical surface has around the stator core spiral slot of 4 one weeks, optical fiber 2 to be arranged in spiral slot and to be sealed by seal 5, the seal 5 at spiral slot two ends is provided with monitoring point 1 opening, seal 5 is provided with monitoring point 1 opening along stator core 4 short transverse interval phase co-altitude h, optical fiber 2 at each monitoring point 1 opening part thermometric as Fibre Optical Sensor;
2) temperature value A of each monitoring point 1 is read in real time
i, A
ibe respectively A1, A2, A3...An, and set threshold temperature T
max, temperature allow extreme value a, temperature standard difference allow extreme value b;
3) when the temperature value A of each monitoring point 1
iin one or more than one temperature be greater than threshold temperature T
max, be then set as the first danger classes, warning device is reported to the police, and generator quits work; Otherwise, if | A
i|≤T
max, then next step is continued;
4) if met | A
1-A
n|≤a then continues next step; If do not met | A
1-A
n|≤a, be then set as the second danger classes, warning device is reported to the police, and can according to circumstances select the need of maintenance;
5) if met
then continue next step; If do not met
then be set as the 3rd danger classes, warning device is reported to the police;
6 calculate each monitoring point temperature value A
imean value
and the variance of accounting temperature value
if meet s≤b, then represent that generator operation is normal, warning device is not reported to the police; If do not meet s≤b, be set as the 4th danger classes, warning device is reported to the police.
The threshold temperature of preferred stator core is T
maxit is 90 DEG C.
As shown in Figure 1, by Fibre Optical Sensor output signal by demodulator of PM signal PM demodulation, connect and be input in warning device.
As shown in Figure 3, optical fiber 2 is arranged on the position in spiral slot 3, and spiral slot 3 closed structure.
Optical fiber 2 is arranged on around in the stator core spiral slot of 4 one weeks 3 equably, first optical fiber 2 is inserted spiral slot 3 from the opening part of the helix of stator core 4 upper end, then first the monitoring point 1 opening part pull-out optical fiber 2 from upper end, by that analogy, until the opening in stator core 4 lower end, in each monitoring point 1 by optical fiber 2 around lopping, length is more than 3m, all monitoring points are installed altogether, the temperature of its energy quick sensing present position stator core 4, and communicate information in demodulator of PM signal PM, obtain temperature information after demodulator of PM signal PM sampling processing.When the temperature value of certain monitoring point 1 exceedes setting threshold values, the hummer in warning device will be sounded a buzzer.
Spiral slot 3 only has opening at two ends and each monitoring point 1 place middle, other position is all airtight by seal, can effectively prevent optical fiber 2 from generator operation, departing from the situation of stator core 4, and the opening at each monitoring point 1 place can easily at installation or replacing optical fiber 2.
Embodiment of the present utility model is as follows:
Arrange 11 monitoring points, optical fiber 2 scheme of installation as shown in Figure 4.Be arranged on by Fibre Optical Sensor on the stator core 4 of some hydropower station hydrogenerator, Fibre Optical Sensor end is connected to demodulator of PM signal PM, and warning device comprises hummer.
Metal material life-span after temperature is more than 90 degree of stator core declines, and therefore sets threshold temperature T
maxit is 90 DEG C.Because stator core peak and minimum point excessive temperature differentials may cause stator core local fracture, therefore design temperature permission extreme value a=20, the even stator core that also can cause of temperature distributing disproportionation are out of shape, and therefore design temperature standard deviation allows extreme value b=2.7.
Opening signal detuner, warning device, make equipment in running order, the temperature of each monitoring point of Real-Time Monitoring.
1) when the temperature value A of each monitoring point 1
iin (i gets 1 to 11), one or more than one temperature are greater than threshold temperature 90 DEG C, be then set as the first danger classes, warning device is reported to the police, and generator quits work; Otherwise, if | A
i|≤90, then continue next step;
2) if met | A
1-A
n|≤20 are continued next step; If do not met | A
1-A
n|≤20, be then set as the second danger classes, warning device is reported to the police, and can according to circumstances select the need of maintenance;
3) if met | A
i-A
i+1| next step is then continued in≤2 (i ∈ [1,10]); If do not met | A
i-A
i+1|≤2 (i ∈ [1,10]), be then set as the 3rd danger classes, warning device is reported to the police;
4) each monitoring point temperature value A is calculated
imean value
and the variance of accounting temperature value
if meet s≤2.7, then represent that generator operation is normal, warning device is not reported to the police; If do not meet s≤2.7, be set as the 4th danger classes, warning device is reported to the police.
Any one temperature value when 11 monitoring points exceedes threshold temperature T
maxwhen 90 DEG C, warning device is reported to the police, and the temperature value data in four integral point moment of 11 control points are
In the 0:00 moment, warning device is reported to the police; In the 3:00 moment, warning device is reported to the police.
The present invention has strong interference immunity, and helical structure all has monitoring for the stator core temperature of differing heights, and prevention stator core is crossed cause thermal damage and had good prospect.
Above-mentioned embodiment is used for explaining and the utility model is described; instead of the utility model is limited; in the protection domain of spirit of the present utility model and claim, any amendment make the utility model and change, all fall into protection domain of the present utility model.
Claims (4)
1. the electricity generator stator core system for detecting temperature based on Fibre Optical Sensor, the stator core (4) of generator is installed with Fibre Optical Sensor, the detection signal of Fibre Optical Sensor obtains stator core temperature signal by signal processing module, and stator core temperature signal is input to warning device; It is characterized in that: have around the stator core spiral slot (3) of (4) weeks on electricity generator stator core (4) external cylindrical surface, optical fiber (2) is arranged in spiral slot (3) also by seal (5) sealing, the seal (5) at spiral slot (3) two ends is provided with monitoring point (1) opening, seal (5) is provided with a monitoring point (1) opening along stator core (4) short transverse interval phase co-altitude, and optical fiber (2) is at each monitoring point (1) opening part thermometric.
2. a kind of electricity generator stator core system for detecting temperature based on Fibre Optical Sensor according to claim 1, is characterized in that: described monitoring point (1) opening add up to 6 ~ 15.
3. a kind of electricity generator stator core system for detecting temperature based on Fibre Optical Sensor according to claim 1, is characterized in that: optical fiber (2) the pitch of the laps length of described each monitoring point (1) opening part is greater than 3m.
4. a kind of electricity generator stator core system for detecting temperature based on Fibre Optical Sensor according to claim 1, is characterized in that: described signal processing module is demodulator of PM signal PM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474965.XU CN204043820U (en) | 2014-08-21 | 2014-08-21 | A kind of electricity generator stator core system for detecting temperature based on Fibre Optical Sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420474965.XU CN204043820U (en) | 2014-08-21 | 2014-08-21 | A kind of electricity generator stator core system for detecting temperature based on Fibre Optical Sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204043820U true CN204043820U (en) | 2014-12-24 |
Family
ID=52244472
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420474965.XU Active CN204043820U (en) | 2014-08-21 | 2014-08-21 | A kind of electricity generator stator core system for detecting temperature based on Fibre Optical Sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204043820U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180922B (en) * | 2014-08-21 | 2016-12-07 | 中国计量学院 | Electricity generator stator core temperature checking method based on Fibre Optical Sensor |
| CN110520702A (en) * | 2017-04-18 | 2019-11-29 | 惠普发展公司，有限责任合伙企业 | Monitor the heat health of electronic equipment |
-
2014
- 2014-08-21 CN CN201420474965.XU patent/CN204043820U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104180922B (en) * | 2014-08-21 | 2016-12-07 | 中国计量学院 | Electricity generator stator core temperature checking method based on Fibre Optical Sensor |
| CN110520702A (en) * | 2017-04-18 | 2019-11-29 | 惠普发展公司，有限责任合伙企业 | Monitor the heat health of electronic equipment |
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| GR01 | Patent grant |