CN201335880Y - Shaft current detection device for generator - Google Patents
Shaft current detection device for generator Download PDFInfo
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- CN201335880Y CN201335880Y CNU2009200992088U CN200920099208U CN201335880Y CN 201335880 Y CN201335880 Y CN 201335880Y CN U2009200992088 U CNU2009200992088 U CN U2009200992088U CN 200920099208 U CN200920099208 U CN 200920099208U CN 201335880 Y CN201335880 Y CN 201335880Y
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Abstract
A shaft current detection device for a generator relates to the current detection device. The utility model aims to solve the problems that the prior device can not accurately detect the magnitude of shaft current, and can not give a warning or perform automatic trip protection in time. A signal output terminal of a shaft current sensor module is connected with a signal input terminal of controlling components; the controlling components comprise a current/ voltage converting module, a wave filtering amplifying module, a core controlling module, an LED digital display module, a first warning module and the like; a signal input terminal and a signal output terminal of the current/ voltage converting module are simultaneously connected with a signal output terminal of the shaft current sensor module and a signal input terminal of the wave filtering amplifying module; a signal output terminal of the wave filtering amplifying module is connected with a signal input terminal of the core controlling module; and a first data signal output terminal and a second data signal output terminal of the core controlling module are simultaneously connected with a data signal input terminal of the LED digital display module and a control signal input terminal of the first warning module. The shaft current detection device for a generator can accurately detect the magnitude of shaft current, display and give a warning or perform automatic trip protection.
Description
Technical field
The utility model relates to current sensing means, is specifically related to a kind of shaft current pick-up unit.
Background technology
When hydrogenerator or turbodynamo operation, because air-gap reluctance difference between stator and the rotor, the Distribution of Magnetic Field complexity causes the magnetic flux imbalance, and then produces shaft current in the macro-axis of generator.The shaft current that produces in the generator's motor shaft can cause lubricating oil oil to degenerate, the accident that causes bearing shell to burn.Existing checkout equipment is owing to can not accurately detecting the size of shaft current, so can not in time give the alarm or carry out the automatic trip protection.
The utility model content
The utility model can not accurately detect the size of shaft current in order to solve existing checkout equipment, and the problem that can not in time give the alarm or carry out the automatic trip protection, and proposes a kind of generator shaft current sensing means.
The generator shaft current sensing means, it comprises shaft current sensor assembly and Control Component; The signal output part of shaft current sensor assembly links to each other with the signal input part of Control Component; Control Component comprises current/voltage-converted module, filtering amplification module, kernel control module, the digital display module of LED and first alarm module; The signal input part of current/voltage-converted module is the signal input part of Control Component; The signal input part of current/voltage-converted module links to each other with the signal output part of shaft current sensor assembly, the signal output part of current/voltage-converted module links to each other with the signal input part of filtering amplification module, and the signal output part of filtering amplification module links to each other with the signal input part of kernel control module; The first data-signal output terminal of kernel control module links to each other with the data-signal input end of the digital display module of LED, and second control signal output ends of kernel control module links to each other with the signal input end of first alarm module.
The utility model can accurately detect the size of shaft current; and intuitively show by the digital display module of LED; first alarm module is compared detected shaft current numerical value with predefined alarming value; as detect the shaft current value greater than the alarming value of setting; in time give the alarm or carry out automatic trip protection, effectively prevent the burn generation of accident of deterioration of lubricant, damage of bearings and bearing shell.
Description of drawings
Fig. 1 is a structural representation of the present utility model; Fig. 2 is the electrical block diagram of kernel control module 4.
Embodiment
Embodiment one: in conjunction with Fig. 1 present embodiment is described, present embodiment comprises shaft current sensor assembly 1 and Control Component; The signal output part of shaft current sensor assembly 1 links to each other with the signal input part of Control Component; It is characterized in that Control Component comprises current/voltage-converted module 2, filtering amplification module 3, kernel control module 4, the digital display module 5 of LED and first alarm module 6; The signal input part of current/voltage-converted module 2 is the signal input part of Control Component; The signal input part of current/voltage-converted module 2 links to each other with the signal output part of shaft current sensor assembly 1, the signal output part of current/voltage-converted module 2 links to each other with the signal input part of filtering amplification module 3, and the signal output part of filtering amplification module 3 links to each other with the signal input part of kernel control module 4; The first data-signal output terminal of kernel control module 4 links to each other with the data-signal input end of the digital display module 5 of LED, and second control signal output ends of kernel control module 4 links to each other with the signal input end of first alarm module 6.
Embodiment two: in conjunction with Fig. 1 present embodiment is described, present embodiment and embodiment one difference are that it has also increased electric current output module 8; The signal input part of electric current output module 8 links to each other with the voltage signal output end of kernel control module 4.Other composition is identical with embodiment one or two with connected mode.The electric current output that electric current output module 8 can be realized 4～20mA realizes the purpose to other functional module power supply.
Embodiment three: in conjunction with Fig. 1 present embodiment is described, present embodiment and embodiment two differences are that Control Component has also increased by second alarm module 7; The signal input end of second alarm module 7 links to each other with the 3rd control signal output ends of kernel control module 4.Other composition is identical with embodiment two with connected mode.Purpose is to improve the accuracy of warning and the reliability of automatic trip action.
Embodiment four: present embodiment is described in conjunction with Fig. 1, present embodiment and embodiment four differences are that it has also increased serial communication module 9, and the data input pin of serial communication module 9 links to each other with the communication signal output terminal of kernel control module 4.Other composition is identical with embodiment one, two or three with connected mode.Increase serial communication module 9 and can carry out on-line communication with other device easily, make things convenient for the transmission and the Long-distance Control of data.
Embodiment five: in conjunction with Fig. 1, Fig. 2 present embodiment is described, present embodiment and embodiment one, two or four differences are that kernel control module 4 is made up of four-core sheet U4, the 6th chip U6, the 7th chip U7, first switch S 1, the second diode D2, the first crystal oscillator JZ1, the 4th resistance R the 4, the 11 resistance R the 11, the 16 resistance R 16～the 18 resistance R the 18, the 11 capacitor C the 11, the 14 capacitor C the 14, the 15 capacitor C the 15, the 17 capacitor C 17～the 19 capacitor C 19 and the 37 capacitor C 37; It is the single-chip microcomputer of ADUC812 that the 6th chip U6 adopts model; The model of four-core sheet U4 is 24CXX; The model of the 7th chip U7 is MAX810; The pin P1.0 of the 6th chip U6 is the signal input part of kernel control module 4, and the pin Cref of the 6th chip U6 links to each other with an end of the 14 capacitor C 14, and the other end of the 14 capacitor C 14 links to each other with ground wire; The pin Vref of the 6th chip U6 links to each other with an end of the 15 capacitor C 15, and the other end of the 15 capacitor C 15 links to each other with ground wire; The pin DAC0 of the 6th chip U6 is the voltage signal output end of kernel control module 4, and the pin RESET of the 6th chip U6 links to each other with an end of the 17 resistance R 17, an end of the 37 capacitor C 37, an end of the 19 capacitor C 19, the negative electrode of the second diode D2, an end of first switch S 1 and an end of the 16 resistance R 16 simultaneously; The other end of the other end of the 37 capacitor C 37, the other end of the 19 capacitor C 19, first switch S 1 links to each other with power vd D with the pin VCC of the 7th chip U7 simultaneously; The anode of the other end of the 17 resistance R 17 and the second diode D2 links to each other with ground wire simultaneously; The other end of the 16 resistance R 16 links to each other with the pin RESET of the 7th chip U7, and the pin GND of the 7th chip U7 links to each other with ground wire; Pin P3.0～pin P3.2 of the 6th chip U6 is the communication signal output terminal of kernel control module 4; One end of one end of the pin DVdd of the 6th chip U6, the pin VCC of four-core sheet U4, the 11 resistance R 11, an end of the 11 capacitor C 11 and the 18 resistance R 18 links to each other with power vd D simultaneously, and the pin HOLD of the other end of the 11 capacitor C 11 and four-core sheet U4 links to each other with ground wire simultaneously; The other end of the 11 resistance R 11 links to each other with the pin CLK of four-core sheet U4, and the other end of the 18 resistance R 18 links to each other with the pin DATA of four-core sheet U4; The pin A2 of the pin A0 of four-core sheet U4, pin A1, the four-core sheet U4 of four-core sheet U4 and the pin GND of four-core sheet U4 link to each other with ground wire simultaneously, and pin P2.0～pin P2.2 of the 6th chip U6 is the first data-signal output terminal of kernel control module 4; The pin XTL1 of the 6th chip U6 links to each other with the end of the first crystal oscillator JZ1 and an end of the 18 capacitor C 18 simultaneously, the pin XTL2 of the 6th chip U6 links to each other with the other end of the first crystal oscillator JZ1 and an end of the 17 capacitor C 17 simultaneously, and the other end of the 17 capacitor C 17 links to each other with ground wire with the other end of the 18 capacitor C 18 simultaneously; The pin P2.3 of the 6th chip U6 is second control signal output ends; The pin EA of the 6th chip U6 links to each other with an end of the 4th resistance R 4, and the other end of the 4th resistance R 4 links to each other with power vd D.Other composition is identical with embodiment four with connected mode.
The utility model content is not limited only to the content of the respective embodiments described above, and the combination of one of them or several embodiments equally also can realize the purpose of inventing.
Principle of work of the present utility model: at first the shaft current input signal that shaft current sensor assembly 1 is collected is sent in the current/voltage-converted module 2 and is changed; data-signal after the conversion is after 3 filtering of filtering amplification module are amplified; send in the kernel control module 4 and handle; and the result shown by the digital display module 5 of LED; result and predefined alarm setting value compare; if when detecting result greater than alarm setting value; first alarm module 6 and second alarm module 7 action successively; realize reporting to the police and the automatic trip shutdown; be the accuracy of assurance warning and the reliability of automatic trip action, second alarm module 7 is deferred action.
Claims (6)
1, generator shaft current sensing means, it comprises shaft current sensor assembly (1) and Control Component; The signal output part of shaft current sensor assembly (1) links to each other with the signal input part of Control Component; It is characterized in that Control Component comprises current/voltage-converted module (2), filtering amplification module (3), kernel control module (4), the digital display module (5) of LED and first alarm module (6); The signal input part of current/voltage-converted module (2) is the signal input part of Control Component; The signal input part of current/voltage-converted module (2) links to each other with the signal output part of shaft current sensor assembly (1), the signal output part of current/voltage-converted module (2) links to each other with the signal input part of filtering amplification module (3), and the signal output part of filtering amplification module (3) links to each other with the signal input part of kernel control module (4); The first data-signal output terminal of kernel control module (4) links to each other with the data-signal input end of the digital display module of LED (5), and second control signal output ends of kernel control module (4) links to each other with the signal input end of first alarm module (6).
2, generator shaft current sensing means according to claim 1 is characterized in that it also comprises electric current output module (8); The signal input part of electric current output module (8) links to each other with the voltage signal output end of kernel control module (4).
3, generator shaft current sensing means according to claim 2 is characterized in that Control Component also comprises second alarm module (7); The signal input end of second alarm module (7) links to each other with the 3rd control signal output ends of kernel control module (4).
4, according to claim 1,2 or 3 described generator shaft current sensing meanss, it is characterized in that it also comprises serial communication module (9), the data input pin of serial communication module (9) links to each other with the communication signal output terminal of kernel control module (4).
5, generator shaft current sensing means according to claim 4 is characterized in that kernel control module (4) is made up of four-core sheet U4, the 6th chip U6, the 7th chip U7, first switch S 1, the second diode D2, the first crystal oscillator JZ1, the 4th resistance R the 4, the 11 resistance R the 11, the 16 resistance R 16～the 18 resistance R the 18, the 11 capacitor C the 11, the 14 capacitor C the 14, the 15 capacitor C the 15, the 17 capacitor C 17～the 19 capacitor C 19 and the 37 capacitor C 37; The pin P1.0 of the 6th chip U6 is the signal input part of kernel control module (4), and the pin Cref of the 6th chip U6 links to each other with an end of the 14 capacitor C 14, and the other end of the 14 capacitor C 14 links to each other with ground wire; The pin Vref of the 6th chip U6 links to each other with an end of the 15 capacitor C 15, and the other end of the 15 capacitor C 15 links to each other with ground wire; The pin DAC0 of the 6th chip U6 is the voltage signal output end of kernel control module (4), and the pin RESET of the 6th chip U6 links to each other with an end of the 17 resistance R 17, an end of the 37 capacitor C 37, an end of the 19 capacitor C 19, the negative electrode of the second diode D2, an end of first switch S 1 and an end of the 16 resistance R 16 simultaneously; The other end of the other end of the 37 capacitor C 37, the other end of the 19 capacitor C 19, first switch S 1 links to each other with power vd D with the pin VCC of the 7th chip U7 simultaneously; The anode of the other end of the 17 resistance R 17 and the second diode D2 links to each other with ground wire simultaneously; The other end of the 16 resistance R 16 links to each other with the pin RESET of the 7th chip U7, and the pin GND of the 7th chip U7 links to each other with ground wire; Pin P3.0～pin P3.2 of the 6th chip U6 is the communication signal output terminal of kernel control module (4); One end of one end of the pin DVdd of the 6th chip U6, the pin VCC of four-core sheet U4, the 11 resistance R 11, an end of the 11 capacitor C 11 and the 18 resistance R 18 links to each other with power vd D simultaneously, and the pin HOLD of the other end of the 11 capacitor C 11 and four-core sheet U4 links to each other with ground wire simultaneously; The other end of the 11 resistance R 11 links to each other with the pin CLK of four-core sheet U4, and the other end of the 18 resistance R 18 links to each other with the pin DATA of four-core sheet U4; The pin A2 of the pin A0 of four-core sheet U4, pin A1, the four-core sheet U4 of four-core sheet U4 and the pin GND of four-core sheet U4 link to each other with ground wire simultaneously, and pin P2.0～pin P2.2 of the 6th chip U6 is the first data-signal output terminal of kernel control module (4); The pin XTL1 of the 6th chip U6 links to each other with the end of the first crystal oscillator JZ1 and an end of the 18 capacitor C 18 simultaneously, the pin XTL2 of the 6th chip U6 links to each other with the other end of the first crystal oscillator JZ1 and an end of the 17 capacitor C 17 simultaneously, and the other end of the 17 capacitor C 17 links to each other with ground wire with the other end of the 18 capacitor C 18 simultaneously; The pin P2.3 of the 6th chip U6 is second control signal output ends; The pin EA of the 6th chip U6 links to each other with an end of the 4th resistance R 4, and the other end of the 4th resistance R 4 links to each other with power vd D.
6, generator shaft current sensing means according to claim 5 is characterized in that it is the single-chip microcomputer of ADUC812 that the 6th chip U6 adopts model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200992088U CN201335880Y (en) | 2009-03-02 | 2009-03-02 | Shaft current detection device for generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2009200992088U CN201335880Y (en) | 2009-03-02 | 2009-03-02 | Shaft current detection device for generator |
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| CN201335880Y true CN201335880Y (en) | 2009-10-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNU2009200992088U Expired - Fee Related CN201335880Y (en) | 2009-03-02 | 2009-03-02 | Shaft current detection device for generator |
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| CN (1) | CN201335880Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508001A (en) * | 2011-10-31 | 2012-06-20 | 中国船舶重工集团公司第七二五研究所 | Current detecting device for ship stern shaft |
| CN105044443A (en) * | 2015-06-30 | 2015-11-11 | 南车株洲电力机车研究所有限公司 | Apparatus for detecting voltage of motor shaft |
| CN105301414A (en) * | 2015-11-21 | 2016-02-03 | 成都科瑞信科技有限责任公司 | Eddy current retarder test system based on voltage conversion |
| CN107976210A (en) * | 2017-11-10 | 2018-05-01 | 长春长光精密仪器集团有限公司 | A kind of method and device for detecting bearing installation |
| CN109324217A (en) * | 2017-08-01 | 2019-02-12 | 中广核研究院有限公司 | A kind of steam turbine generator shaft current and shaft voltage on-Line Monitor Device |
| CN113037022A (en) * | 2021-03-12 | 2021-06-25 | 国网新疆电力有限公司电力科学研究院 | Phase modifier large shaft protection method and device |
| US11569712B2 (en) | 2021-04-05 | 2023-01-31 | General Electric Renovables Espana, S.L. | System and method for detecting bearing insulation and ground brush health in a generator |
-
2009
- 2009-03-02 CN CNU2009200992088U patent/CN201335880Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102508001A (en) * | 2011-10-31 | 2012-06-20 | 中国船舶重工集团公司第七二五研究所 | Current detecting device for ship stern shaft |
| CN105044443A (en) * | 2015-06-30 | 2015-11-11 | 南车株洲电力机车研究所有限公司 | Apparatus for detecting voltage of motor shaft |
| CN105301414A (en) * | 2015-11-21 | 2016-02-03 | 成都科瑞信科技有限责任公司 | Eddy current retarder test system based on voltage conversion |
| CN109324217A (en) * | 2017-08-01 | 2019-02-12 | 中广核研究院有限公司 | A kind of steam turbine generator shaft current and shaft voltage on-Line Monitor Device |
| CN107976210A (en) * | 2017-11-10 | 2018-05-01 | 长春长光精密仪器集团有限公司 | A kind of method and device for detecting bearing installation |
| CN107976210B (en) * | 2017-11-10 | 2020-06-12 | 长春长光精密仪器集团有限公司 | Method and device for detecting bearing installation |
| CN113037022A (en) * | 2021-03-12 | 2021-06-25 | 国网新疆电力有限公司电力科学研究院 | Phase modifier large shaft protection method and device |
| US11569712B2 (en) | 2021-04-05 | 2023-01-31 | General Electric Renovables Espana, S.L. | System and method for detecting bearing insulation and ground brush health in a generator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Harbin Hakong Industry Co., Ltd Assignor: Yu Wanfa|Li Feng Contract record no.: 2012230001452 Denomination of utility model: Shaft current detection device for generator Granted publication date: 20091028 License type: Exclusive License Record date: 20120806 |
|
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Harbin Hakong Industry Co., Ltd Assignor: Yu Wanfa|Li Feng Contract record no.: 2012230001452 Denomination of utility model: Shaft current detection device for generator Granted publication date: 20091028 License type: Exclusive License Record date: 20120806 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20091028 Termination date: 20150302 |
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| EXPY | Termination of patent right or utility model |