CN206583527U - A kind of shaft vibration monitoring device for removing generator shaft voltage disturbance - Google Patents
A kind of shaft vibration monitoring device for removing generator shaft voltage disturbance Download PDFInfo
- Publication number
- CN206583527U CN206583527U CN201720220268.5U CN201720220268U CN206583527U CN 206583527 U CN206583527 U CN 206583527U CN 201720220268 U CN201720220268 U CN 201720220268U CN 206583527 U CN206583527 U CN 206583527U
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- CN
- China
- Prior art keywords
- shaft voltage
- shaft
- input port
- signal input
- generator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model is related to a kind of shaft vibration monitoring device for removing generator shaft voltage disturbance, the problem of generator shaft voltage is disturbed vibration measurements can effectively be solved, technical scheme is, circuit is controlled to include DSP Processor, oscillator and amplifier, the input of oscillator is connected with vibration displacement signal input port, output end is connected with the first A/D modular converters, first A/D modular converters are connected with DSP Processor, the input of amplifier is connected with shaft voltage component signal input port, output end is connected with the input of the 2nd A/D modular converters, 2nd A/D modular converters are connected with DSP Processor, current vortex sensor is connected with vibration displacement signal input port, shaft voltage sensing coil is connected with shaft voltage component signal input port, the vibration displacement signal of the big axle of generator amature is converted to electric signal by the utility model, and by measuring high-frequency alternating component of the shaft voltage on big axle, remove interference of the shaft voltage to current vortex sensor.
Description
Technical field
The utility model is related to generator shaft vibration monitor system, particularly a kind of axle for removing generator shaft voltage disturbance
Vibration monitoring device.
Background technology
Generator Vibration signal can reflect the operation conditions of unit, and shaft vibration monitoring system has become guarantee power plant
The important component of safe operation, the current widely used current vortex sensor of shaft vibration monitoring system is former by current vortex
The vibration displacement signal of rotating shaft is converted to electric signal by reason, judges the Vibration Condition of generator's motor shaft.And in the actual fortune of generator
In row, the reason such as loose contact can cause shaft voltage to increase caused by the abrasion of big axle grounding carbon brush, the high fdrequency component of shaft voltage
The induced-current of current vortex sensor Inside coil can be interfered, in turn result in result of oscillation higher.Traditional shaft vibration
Monitoring device does not take the interference that shaft voltage is caused into account, is vibrated more than once in the actual motion of power plant
The situation of measured value virtual height false alarm and chaser.Therefore, it improves and innovated imperative.
The content of the invention
For above-mentioned situation, to overcome the defect of prior art, the purpose of the utility model is just to provide a kind of remove and sent out
The shaft vibration monitoring device of motor shaft voltage disturbance, can effectively solve generator shaft voltage and vibration measurements interference is asked
Topic.
The utility model solve technical scheme be, it is a kind of remove generator shaft voltage disturbance shaft vibration monitoring device,
Be respectively arranged with control circuit including housing and in housing, housing display, vibration displacement signal input port and
Shaft voltage component signal input port, control circuit include DSP Processor, oscillator and amplifier, the input of oscillator with
Vibration displacement signal input port is connected, and output end is connected with the first A/D modular converters, the output end of the first A/D modular converters
It is connected with the input of DSP Processor, the input of amplifier is connected with shaft voltage component signal input port, output end and the
The input of two A/D modular converters is connected, and the output end of the 2nd A/D modular converters is connected with the input of DSP Processor, DSP
The output end of processor is connected with display, is connected with vibration displacement signal input port for gathering shaking for generator's motor shaft
It is connected with the current vortex sensor of dynamic displacement data, shaft voltage component signal input port for gathering the dry of generator's motor shaft
Disturb the shaft voltage sensing coil of shaft voltage component.
Be respectively arranged with indicator lamp and alarm on described housing, the output end of DSP Processor respectively with indicator lamp and
Alarm is connected, and constitutes the exceeded alarm structure of vibration displacement of generator's motor shaft.
The utility model structure novel and unique, advantages of simple is converted to the vibration displacement signal of the big axle of generator amature
Electric signal, and by measuring high-frequency alternating component of the shaft voltage on big axle, remove shaft voltage and current vortex sensor is done
Disturb, efficiently solve axle and shake false alarm caused by measured value virtual height and chaser phenomenon, small volume is lightweight, and cost is low, user
Just, effect is good, there is good social and economic benefit.
Brief description of the drawings
Fig. 1 is the utility model shell structure schematic diagram.
Fig. 2 is the connection diagram that the utility model controls circuit.
Embodiment
Embodiment of the present utility model is described in further detail below in conjunction with accompanying drawing.
Provided by Fig. 1-2, the utility model includes setting respectively on housing 4 and the control circuit in housing, housing
There are display 10, vibration displacement signal input port 8 and shaft voltage component signal input port 9, control circuit includes DSP processing
Device, oscillator and amplifier, the input of oscillator are connected with vibration displacement signal input port 8, and output end turns with the first A/D
Change the mold block to be connected, the output end of the first A/D modular converters is connected with the input of DSP Processor, the input and axle of amplifier
Component of voltage signal input port 9 is connected, and output end is connected with the input of the 2nd A/D modular converters, the 2nd A/D modular converters
Output end be connected with the input of DSP Processor, the output end of DSP Processor is connected with display, and vibration displacement signal is defeated
The current vortex sensor 1 of the vibration displacement data for gathering generator's motor shaft 3, shaft voltage component letter are connected with inbound port 8
The shaft voltage that the interference shaft voltage component for gathering generator's motor shaft 3 is connected with number input port 9 senses coil 2.
To ensure using effect, described current vortex sensor 1 passes through insulated cable 12 and vibration displacement signal input part
Mouth 8 is connected, and shaft voltage sensing coil 2 is connected by insulated cable 12 with shaft voltage component signal input port 9；
Circuit board 5 is provided with described housing 4, control circuit dress is on circuit boards；
Be respectively arranged with indicator lamp 7 and alarm 11 on described housing 4, the output end of DSP Processor respectively with instruction
Lamp 7 is connected with alarm 11, constitutes the exceeded alarm structure of vibration displacement of generator's motor shaft, and described indicator lamp 7 is conventional
LED light, described alarm 11 is conventional alarming horn；
The power interface 6 being connected with the power input of DSP Processor is provided with described housing 4, for connecting
220V AC powers；
Described housing 4 is square or circle.
Described DSP Processor is commercially available prod（Prior art）, such as using the model DSP28335 of TI companies production
Chip, and for example model TMS320F28335 exploitation chip board；
Described oscillator is commercially available prod（Prior art）, high frequency electric can be produced, and deliver to by insulated cable
In coil inside current vortex sensor probe, coil produces high-frequency alternating magnetic field, can be using conventional CMOS crystal oscillations electricity
Road, frequency of oscillation 1MHz or so, it can for example use VCC1 crystal oscillators；
Described current vortex sensor is commercially available prod（Prior art）, such as can be using electricity serial model HZ-891XL
Eddy current sensor；
Described amplifier is commercially available prod（Prior art）, such as model AD526 operational amplifier；
The first described A/D modular converters and the 2nd A/D modular converters are commercially available prod（Prior art）, such as model
AD9280, AD606 A/D modular converters, by processing can be converted into data signal by analog signal；
Described shaft voltage sensing coil 2 can use Conventional coil（Its number of turn and size should be with current vortex sensor probes 1
Inside coil it is close or identical）, the alternating component of shaft voltage can cause the change in magnetic field on axle on the big axle of generator amature, lead to
Cross the change of shaft voltage sensing coil induced field and produce induced-current, the faradic size can reflect shaft voltage high frequency
The disturbed condition that alternating component is produced to current vortex sensor, by induced-current by amplifier and the 2nd A/D modular converters it
After be output to DSP Processor；
The utility model in use, current vortex sensor 1 and shaft voltage sensing coil 2 to be not directly contacted with generator big
Axle, 2 ~ 3cm distance is kept with generator's motor shaft, and oscillator produces high frequency electric, and delivering to current vortex by insulated cable senses
In coil inside device, coil produces high-frequency alternating magnetic field,
Tested generator's motor shaft is close apart from this magnetic field, high frequency induction current is produced on big axle surface, according to faraday
Electromagnetic induction principle, big axle surface can induce a reverse high-frequency alternating magnetic field, and the magnetic field reacts on current vortex sensing
The Inside coil of device so that high frequency electric amplitude and phase place change in coil, big axle is drawn according to the electric current and phase of measurement
Vibration displacement data, the induced-current in coil is exported by insulated cable, the first A/D modular converters can be by analog signal
Digital data transmission is converted into DSP Processor；The shaft voltage produced in generator operation can also produce alternating electromagnetic field,
Interference is produced to the induced-current of current vortex sensor Inside coil, shaft voltage senses principle of the coil 2 by electromagnetic induction,
The shaft voltage component that interference is produced to current vortex sensor is induced on coil, induced-current is delivered to by insulated cable and put
Exported after big device, the 2nd A/D modular converters can convert analog signals into digital data transmission to DSP Processor；DSP Processor
Current vortex sensor output component is subtracted into shaft voltage sensing coil output component, you can obtain removing the sensing of shaft voltage interference
Current signal, the size of generator's motor shaft vibration displacement amount is drawn by faradic signal, finally, by what is calculated
Displacement output valve shows vibration displacement numerical value to display, if beyond setting, sending data signal, lighting instruction
Lamp, alarm equipment alarm.Compared with prior art, the utility model can change the vibration displacement signal of the big axle of generator amature
For electric signal, and by measuring high-frequency alternating component of the shaft voltage on big axle, shaft voltage is removed to current vortex sensor
Interference, efficiently solves axle and shakes false alarm caused by measured value virtual height and chaser phenomenon.Small volume, lightweight, cost is low, uses
It is convenient, there is good social and economic benefit.
Claims (6)
1. a kind of shaft vibration monitoring device for removing generator shaft voltage disturbance, it is characterised in that including housing（4）With mounted in shell
Display is respectively arranged with internal control circuit, housing（10）, vibration displacement signal input port（8）With shaft voltage component
Signal input port（9）, control circuit to include DSP Processor, oscillator and amplifier, the input and vibration displacement of oscillator
Signal input port（8）It is connected, output end is connected with the first A/D modular converters, the output end and DSP of the first A/D modular converters
The input of processor is connected, input and the shaft voltage component signal input port of amplifier（9）It is connected, output end and second
The input of A/D modular converters is connected, and the output end of the 2nd A/D modular converters is connected with the input of DSP Processor, at DSP
The output end of reason device is connected with display, vibration displacement signal input port（8）On be connected with for gathering generator's motor shaft（3）
Vibration displacement data current vortex sensor（1）, shaft voltage component signal input port（9）On be connected with for gather generate electricity
The big axle of machine（3）Interference shaft voltage component shaft voltage sensing coil（2）.
2. the shaft vibration monitoring device according to claim 1 for removing generator shaft voltage disturbance, it is characterised in that described
Current vortex sensor（1）Pass through insulated cable（12）With vibration displacement signal input port（8）It is connected, shaft voltage sensing coil
（2）Pass through insulated cable（12）With shaft voltage component signal input port（9）It is connected.
3. the shaft vibration monitoring device according to claim 1 for removing generator shaft voltage disturbance, it is characterised in that described
Housing（4）Inside it is provided with circuit board（5）, control circuit dress is on circuit boards.
4. the shaft vibration monitoring device according to claim 1 for removing generator shaft voltage disturbance, it is characterised in that described
Housing（4）On be respectively arranged with indicator lamp（7）And alarm（11）, the output end of DSP Processor respectively with indicator lamp（7）With
Alarm（11）It is connected, constitutes the exceeded alarm structure of vibration displacement of generator's motor shaft.
5. the shaft vibration monitoring device according to claim 1 for removing generator shaft voltage disturbance, it is characterised in that described
Housing（4）On be provided with the power interface being connected with the power input of DSP Processor（6）.
6. the shaft vibration monitoring device of the removal generator shaft voltage disturbance according to claim 1-5 any one, it is special
Levy and be, described housing（4）For square or circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720220268.5U CN206583527U (en) | 2017-03-08 | 2017-03-08 | A kind of shaft vibration monitoring device for removing generator shaft voltage disturbance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720220268.5U CN206583527U (en) | 2017-03-08 | 2017-03-08 | A kind of shaft vibration monitoring device for removing generator shaft voltage disturbance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206583527U true CN206583527U (en) | 2017-10-24 |
Family
ID=60111677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720220268.5U Expired - Fee Related CN206583527U (en) | 2017-03-08 | 2017-03-08 | A kind of shaft vibration monitoring device for removing generator shaft voltage disturbance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206583527U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387279A (en) * | 2018-12-19 | 2019-02-26 | 南京工程学院 | A kind of detection circuit of the vibration signal of pair of turbine generator final stage |
-
2017
- 2017-03-08 CN CN201720220268.5U patent/CN206583527U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109387279A (en) * | 2018-12-19 | 2019-02-26 | 南京工程学院 | A kind of detection circuit of the vibration signal of pair of turbine generator final stage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171024 |