CN204286635U - A kind of fire proof motor temperature of rotor measurement mechanism - Google Patents
A kind of fire proof motor temperature of rotor measurement mechanism Download PDFInfo
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- CN204286635U CN204286635U CN201420732809.9U CN201420732809U CN204286635U CN 204286635 U CN204286635 U CN 204286635U CN 201420732809 U CN201420732809 U CN 201420732809U CN 204286635 U CN204286635 U CN 204286635U
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Abstract
A kind of fire proof motor temperature of rotor measurement mechanism, for measuring the temperature of rotor, be rotor axis of electric in rotor, comprise the fiber-optical grating temperature sensor that several centre frequencies are different, motor internal Transmission Fibers, be opened in the optical-fibre channel in rotor axis of electric, fiber rotation connector, outside motor Transmission Fibers, optical fiber grating temperature measuring system, optical fiber grating temperature measuring system comprises fiber Bragg grating (FBG) demodulator and computing machine, fiber-optical grating temperature sensor is arranged on fire proof motor rotor, the utility model proposes fire proof motor temperature of rotor measurement mechanism, adopt spectral measurement, fire proof motor inside is all light signal, the impact of the inner strong electromagnetic of fire proof motor is avoided from principle, measuring accuracy is high.
Description
Technical field
The utility model relates to fire proof motor, belongs to fire proof motor technical field of measurement and test, can be widely used in the measurement of fire proof motor temperature of rotor, fire proof motor temperature field test, fire proof motor monitoring temperature and fault diagnosis.
Background technology
During fire proof motor work, internal temperature can raise, and makes its insulating material accelerated deterioration, efficiency reduction, serious caused electrical fault.Temperature is one of important parameter of fire proof motor, all needs to measure its temperature in the design of fire proof motor, research, multiple link such as test and operation.Fire proof motor temperature survey is of great significance optimal design, raising performance tool.The measurement of fire proof motor temperature of rotor is its thermometric difficult point.
Current studies in China mechanism proposes certain methods to motor rotor temperature measurement, mainly contains: the people such as the Gou Zhide of Harbin Electric Machine Co., Ltd. calculate the temperature of rotor by the mode measuring rotor resistance; The Zhang Zhenhan of electric power institute of Shanghai Communications University adopts Pt100 thermistor to be converted by R-F, is transmitted by signal by conducting slip ring, realizes temperature of rotor and measures; The Ren Penghui of China Nuclear Power Engineering Co., Ltd., by installing detecting coil between the magnetic pole of exciter stator, exciter rotor axle installs and measures slip ring.Measurement rotor voltage, electric current obtain temperature of rotor; The easily new strong of marine integrated power technology science and techniques of defence key lab of naval engineering university waits people with Pt100 resistance as temperature sensor, the axle of rotor installs temperature collecting device, wirelessly temperature data is sent to neighbouring receiving trap, send data to host computer by USB interface again, realize the measurement of motor rotor temperature.
These methods above-mentioned are that directly measurement or indirect inspection are all the electrical measuring methods adopted, and by the interference of motor internal strong electromagnetic environment, measuring accuracy is not high.
High speed, high-precision infrared temperature-test sensor are arranged on generator unit stator by the people such as the Wu Yihui of Fujian Shuikou Power Generation Group Co., Ltd., realize the temperature survey to each magnetic pole of generator amature.But the size of infrared probe cannot be applied to middle and small motor more greatly.The operating temperature range of infrared temperature sensor is mostly less than 60 DEG C in addition, cannot long-term work in the motor internal with higher temperature.
The Yue Youlan of Jiaozuo Univ. is according to the optical absorption characteristics of gallium arsenide semiconductor, devise a kind of novel Generator Rotor Temperature measuring system, gallium arsenide semiconductor sheet is attached to generator amature surface, light source is by irradiating fiber-optic illuminated gallium arsenide semiconductor sheet, the light of reflection is incorporated into measuring system through measuring optical fiber, can measuring tempeature by the change detecting sideband wavelength.Irradiation optical fiber and measuring optical fiber are all arranged on generator unit stator.Although semiconductor absorption optical fiber temperature-measurement is not by the impact of electromagnetic interference (EMI), but by the coupling condition with optical fiber, the temperature characterisitic of luminotron, receiving tube, the impact of the factors such as semiconductor material preparation technology, its measuring accuracy is not high, cannot meet motor rotor temperature testing requirement.In addition, when reality uses owing to being surrounded by protectiveness material outside gallium arsenide film, its response speed is slow, and the motor rotor temperature be not suitable for is in working order measured.
Because fire proof motor has, strong electromagnetic, air gap are little, the multifrequency nature such as narrow space, rotor turns, and need inside and outside electric signal isolation, the multiple methods such as traditional thermistor temperature detecting, infrared measurement of temperature all cannot meet its measurement demand, and fire proof motor inside temperature measurement particularly fire proof motor temperature of rotor measurement is the difficult problem that fire proof motor research field faces always.
Utility model content
The purpose of this utility model is to provide a kind of fire proof motor temperature of rotor measurement mechanism, for realizing the measurement to fire proof motor temperature of rotor.
The technical solution of the utility model is:
A kind of fire proof motor temperature of rotor measurement mechanism, for measuring the temperature of rotor, be rotor axis of electric in rotor, comprise the fiber-optical grating temperature sensor that several centre frequencies are different, motor internal Transmission Fibers, be opened in the optical-fibre channel in rotor axis of electric, fiber rotation connector, outside motor Transmission Fibers, optical fiber grating temperature measuring system, optical fiber grating temperature measuring system comprises fiber Bragg grating (FBG) demodulator and computing machine, fiber-optical grating temperature sensor is arranged on fire proof motor rotor, fiber-optical grating temperature sensor by Fiber connection together and be connected to the input end of fire proof motor internal transmission optical fiber, radial hole on rotor axis of electric of the output terminal of fire proof motor internal transmission optical fiber and axial hole are incorporated into the rotor-end of fiber rotation connector, the stator terminal of fiber rotation connector is connected with the optical fiber grating temperature measuring system based on wavelength-division multiplex method by fire proof motor external transmission optical fiber, any one connected mode in series, parallel or connection in series-parallel mixing is adopted between fiber-optical grating temperature sensor.
Fiber-optical grating temperature sensor comprises outer field fibre cladding, and be fiber core and fiber grating in fibre cladding, described fiber grating is positioned at centre, and the two ends of fiber grating are fiber core.
Fiber rotation connector and fire proof motor armature spindle are coaxially installed.
Optical-fibre channel comprises radial hole and axial aperture.
The utility model has following characteristics and good result:
1. the utility model proposes fire proof motor temperature of rotor measurement mechanism, adopt spectral measurement, fire proof motor inside is all light signal, and avoid the impact of the inner strong electromagnetic of fire proof motor from principle, measuring accuracy is high.
2. the diameter of the fiber-optical grating temperature sensor carried of the utility model and Transmission Fibers is very little, and suitable dress property is very good.
3. measuring method that the utility model is carried can realize fire proof motor rotor multipoint temperature measuring.
4. measuring method that the utility model is carried adopts optical signal transmission fiber, achieves the electrical isolation inside and outside motor, does not damage the explosion-proof performance of fire proof motor.
Accompanying drawing explanation
Fig. 1 is the utility model fire proof motor temperature of rotor measuring principle figure;
Fig. 2 is that the utility model is implemented to illustrate certain type rotor multipoint temperature measuring schematic diagram;
Fig. 3 is fiber-optic grating sensor schematic diagram;
Fig. 4 is the spectrogram of fiber-optic grating sensor, and Fig. 4-a is the spectrum of incident light, and Fig. 4-b is the spectrum of reflected light, and Fig. 4-c is the spectrum change amount that temperature variation causes, and Fig. 4-d is the spectrum of transmitted light;
Wherein: end bearing, 15-fibre cladding, 16-fiber core, 17-fiber grating before 1-first fiber-optical grating temperature sensor, 2-second fiber-optical grating temperature sensor, 3-n-th fiber-optical grating temperature sensor, 4-motor internal Transmission Fibers, 5-radial hole, 6-axial aperture, 7-fiber rotation connector, 8-outside motor Transmission Fibers, 9-optical fiber grating temperature measuring system, 10-fiber Bragg grating (FBG) demodulator, 11-computing machine, 12-motor rear end bearing, 13-motor stator, 14-motor, 18-rotor, 19-rotor axis of electric.
Embodiment
The utility model proposes a kind of fiber grating fire proof motor temperature of rotor measuring method based on wavelength-division multiplex principle.As shown in Figure 1, 2, motor comprises rotor axis of electric 19, the front-end and back-end of rotor axis of electric 19 and motor casing junction are respectively equipped with end bearing 14 and motor rear end bearing 12 before motor, the rotor 18 that the centre position of motor is provided with motor stator 13 and is positioned in the middle of motor stator 13.
The measurement mechanism that fire proof motor temperature of rotor measuring method adopts comprises: several fiber-optical grating temperature sensors, motor internal Transmission Fibers 4, be opened in radial hole 5 in rotor axis of electric 19 and axial aperture 6, the fiber rotation connector 7 being connected to rotor shaft end, outside motor Transmission Fibers 8, optical fiber grating temperature measuring system 9, fiber Bragg grating (FBG) demodulator 10 and computing machine 11.
First fiber-optical grating temperature sensor 1, second fiber-optical grating temperature sensor 2 ..., the n-th fiber-optical grating temperature sensor 3 is arranged on fire proof motor rotor 18, linked together by connecting fiber and be connected to the input end of fire proof motor internal transmission optical fiber, radial hole 5 on rotor axis of electric 19 of the output terminal of fire proof motor internal transmission optical fiber and axial hole 6 are incorporated into the rotor-end of fiber rotation connector 7, and the stator terminal of fiber rotation connector 7 is connected with optical fiber grating temperature measuring system by fire proof motor external transmission optical fiber 8;
The light that optical fiber grating temperature measuring system internal bandwidth light source sends through fire proof motor external transmission optical fiber, fiber rotation connector and fire proof motor internal transmission optical fiber arrive the n-th fiber-optical grating temperature sensor, second fiber-optical grating temperature sensor ..., first fiber-optical grating temperature sensor, first fiber-optical grating temperature sensor, second fiber-optical grating temperature sensor ..., the n-th fiber-optical grating temperature sensor can need to adopt the connected mode such as series, parallel or connection in series-parallel mixing according to installation.
The light signal containing temperature information of each fiber-optical grating temperature sensor reflection turns back to optical fiber grating temperature measuring system by former road, and this system, through the Measurement and analysis to spectrum, can obtain the temperature of each fiber-optical grating temperature sensor position.
Fiber rotation connector 7 and fire proof motor rotor 18 axle are coaxially installed.
Fiber-optical grating temperature sensor quantity n is flexibly, can need to determine according to measurement.
The utility model embodiment as shown in Figure 2, fiber-optical grating temperature sensor selects the SEN-T-11 of Shenzhen T & S Communications Co., Ltd., the diameter of this sensor is 1.5mm, need to have chosen the different sensor of 10 centre frequencies according to test, and by optical fiber splicer by these sensor series together.The SNFO-1A of Sen Ruipu Electronics Co., Ltd. of fiber rotation connector Shenzhen.(FBG) demodulator selects the TS-WI-80 8 channel fiber grating sensing analyser of the too time, installs the temperature survey software supporting with it on computers.
Before measurement, 10 SEN-T-11 type fiber-optical grating temperature sensors are installed to the precalculated position on tested rotor surface, and are connected with the rotor-end interface of SNFO-1A type fiber rotation connector by the Transmission Fibers of motor internal.The stator terminal of fiber rotation connector is connected with TS-WI-80 type optical fiber grating sensing analyser by external transmission optical fiber.TS-WI-80 is connected with computing machine by USB interface.
As shown in Figure 3, the structure of fiber-optical grating temperature sensor is outer is fibre cladding 15, inside is fiber core 16, for fiber grating 17(is called for short grating in the middle of fiber core 16).
During measurement, the light that the wideband light source in S-WI-80 type optical fiber grating sensing analyser sends, through external transmission optical fiber, fiber rotation connector and internal transmission optical fiber, arrives 10 fiber-optical grating temperature sensors.Spectrum broadband light as depicted in fig. 4-a incides fiber-optical grating temperature sensor, and the light identical with center sensor frequency is reflected by grating 17, and reflected light spectrum is as shown in Fig. 4-b; The light different from center sensor frequency directly through grating 17, transmission and going out, transmitted spectrum is as shown in Fig. 4-d; The connecting fiber of transmitted light between fiber-optic grating sensor arrives other fiber-optic grating sensor.The centre frequency of fiber grating 17 is to responsive to temperature, and namely temperature variation can cause the change of fiber grating centre frequency, and as shown in Fig. 4-c, reflected light wavelength variation delta is the function of temperature:
Δ=f(t)
By the frequency spectrum of S-WI-80 type optical fiber grating sensing analyser measuring optical fiber optical grating reflection light, spectral change amount is converted to temperature by computer measurement software, just can obtain the temperature of fiber-optic grating sensor present position.In the present embodiment, because select the centre frequency of 10 fiber-optic grating sensors different, so spectral measurement is independent of each other each other, S-WI-80 type optical fiber grating sensing analyser adopts the method for wavelength-division multiplex, measure the spectral change of 10 sensors respectively, in conjunction with computer measurement software, just can measure the temperature of 10 points on fire proof motor rotor respectively, realize the multipoint temperature measuring of fire proof motor working rotor state.
Below by reference to the accompanying drawings embodiment of the present utility model is described; but these explanations can not be understood to limit the utility model scope; protection domain of the present utility model is limited by the claims of enclosing, and any change on the utility model claim basis is all protection domain of the present utility model.
Claims (4)
1. a fire proof motor temperature of rotor measurement mechanism, for measuring the temperature of rotor, be rotor axis of electric in rotor, it is characterized in that: comprise the fiber-optical grating temperature sensor that several centre frequencies are different, motor internal Transmission Fibers, be opened in the optical-fibre channel in rotor axis of electric, fiber rotation connector, outside motor Transmission Fibers, optical fiber grating temperature measuring system, optical fiber grating temperature measuring system comprises fiber Bragg grating (FBG) demodulator and computing machine, fiber-optical grating temperature sensor is arranged on fire proof motor rotor, fiber-optical grating temperature sensor by Fiber connection together and be connected to the input end of fire proof motor internal transmission optical fiber, radial hole on rotor axis of electric of the output terminal of fire proof motor internal transmission optical fiber and axial hole are incorporated into the rotor-end of fiber rotation connector, the stator terminal of fiber rotation connector is connected with the optical fiber grating temperature measuring system based on wavelength-division multiplex method by fire proof motor external transmission optical fiber, any one connected mode in series, parallel or connection in series-parallel mixing is adopted between fiber-optical grating temperature sensor.
2. fire proof motor temperature of rotor measurement mechanism according to claim 1, it is characterized in that: fiber-optical grating temperature sensor comprises outer field fibre cladding, be fiber core and fiber grating in fibre cladding, described fiber grating is positioned at centre, and the two ends of fiber grating are fiber core.
3. fire proof motor temperature of rotor measurement mechanism according to claim 1 and 2, is characterized in that: fiber rotation connector and fire proof motor armature spindle are coaxially installed.
4. fire proof motor temperature of rotor measurement mechanism according to claim 1 and 2, is characterized in that: optical-fibre channel comprises radial hole and axial aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420732809.9U CN204286635U (en) | 2014-11-28 | 2014-11-28 | A kind of fire proof motor temperature of rotor measurement mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420732809.9U CN204286635U (en) | 2014-11-28 | 2014-11-28 | A kind of fire proof motor temperature of rotor measurement mechanism |
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| CN204286635U true CN204286635U (en) | 2015-04-22 |
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| CN201420732809.9U Withdrawn - After Issue CN204286635U (en) | 2014-11-28 | 2014-11-28 | A kind of fire proof motor temperature of rotor measurement mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374491A (en) * | 2014-11-28 | 2015-02-25 | 南阳防爆集团股份有限公司 | Explosion-proof motor rotor temperature measuring device and method |
| CN111982348A (en) * | 2020-08-20 | 2020-11-24 | 中国科学院工程热物理研究所 | Rotary optical fiber temperature measurement system |
| CN112763096A (en) * | 2020-12-23 | 2021-05-07 | 成都伊莱特光测科技有限公司 | Motor rotor temperature on-line monitoring system based on fiber grating sensing technology |
-
2014
- 2014-11-28 CN CN201420732809.9U patent/CN204286635U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374491A (en) * | 2014-11-28 | 2015-02-25 | 南阳防爆集团股份有限公司 | Explosion-proof motor rotor temperature measuring device and method |
| CN104374491B (en) * | 2014-11-28 | 2017-05-24 | 南阳防爆集团股份有限公司 | Explosion-proof motor rotor temperature measuring device and method |
| CN111982348A (en) * | 2020-08-20 | 2020-11-24 | 中国科学院工程热物理研究所 | Rotary optical fiber temperature measurement system |
| CN112763096A (en) * | 2020-12-23 | 2021-05-07 | 成都伊莱特光测科技有限公司 | Motor rotor temperature on-line monitoring system based on fiber grating sensing technology |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20150422 Effective date of abandoning: 20170524 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20150422 Effective date of abandoning: 20170524 |
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| AV01 | Patent right actively abandoned |