CN110332899A - A kind of generator air gap measuring device and its measurement method - Google Patents
A kind of generator air gap measuring device and its measurement method Download PDFInfo
- Publication number
- CN110332899A CN110332899A CN201910773091.5A CN201910773091A CN110332899A CN 110332899 A CN110332899 A CN 110332899A CN 201910773091 A CN201910773091 A CN 201910773091A CN 110332899 A CN110332899 A CN 110332899A
- Authority
- CN
- China
- Prior art keywords
- generator
- radio receiving
- receiving transmitting
- air gap
- laser displacement
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- 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.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/14—Measuring arrangements characterised by the use of optical techniques for measuring distance or clearance between spaced objects or spaced apertures
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
- G08C17/02—Arrangements for transmitting signals characterised by the use of a wireless electrical link using a radio link
Abstract
The invention discloses a kind of generator air gap measuring device and its measurement methods, it includes the laser displacement sensor (1) and the key phase (2) for being fixedly connected on guide bearing top side that inclination is fixedly connected on electricity generator stator core and rotor magnetic pole, and guide bearing side is fixed with metallic target piece (3)；It is connected separately with No.1 radio receiving transmitting module (4) and wireless transmitter module (5) on laser displacement sensor (1) and key phase (2), is provided with outside generator and is connected with No. two radio receiving transmitting module (7) PC machine (6)；The measurement method of above-mentioned apparatus is that key phase senses that generator speed more mean time, laser displacement sensor measure the distance between stator core and rotor magnetic pole, complete the measurement of the air gap.The present invention can not only improve accuracy of measurement, also have the advantages that measurement efficiency is higher and measurement effect is preferable.
Description
Technical field
The present invention relates to the measurement method and device that are separated by object gap, especially a kind of generator air gap measurement dress
It sets and its measurement method.
Background technique
Generator air gap measurement is the reflection of a very important electromagnetism and mechanical parameter, and quick precise measurement is empty
Gas gap is very important unit maintenance work, can be truly reflected out set state, repair quality directly affects hair
The safe and stable operation of motor.Length can also restrict the installation and repairing period of entire unit the time required to simultaneously, directly affect electricity
Factory's economic benefit.
Currently, almost all of power station still uses static manual measurement in terms of generator air gap measurement
Mode first stops the generator in unit, then the measuring tool of wedge shape is caught in gap, inserts finally by artificial reading
The size for entering depth and calculated gap, to measure stator inner circle and rotor outer circle contour curve relative to big axis rotation center
The data such as eccentricity.But it is traditional by the way of static manual measurement when due to being manual measurement reading when, due to
Different people feels different, and there is some difference for reading, and in data transfer, inevitably deposits in adjustment calculating process
In certain human error, accuracy is relatively low；It so that the generator in unit is in when measurement and shut down static conditions
Under, position could be measured each generator air gap and arrange that manpower monitoring record data, measurement efficiency are low；And measurement data without
Method reflects the situation of change of unit air gap in starting and later operational process, and measurement effect is poor.Therefore, existing power generation
Machine the air gap measurement method and device have that accuracy is lower, measurement efficiency is lower and measurement effect is poor.
Summary of the invention
The object of the present invention is to provide a kind of generator air gap measuring device and its measurement methods.The present invention is not
It only can be improved accuracy of measurement, also have the advantages that measurement efficiency is higher and measurement effect is preferable.
Technical solution of the present invention: a kind of generator air gap measuring device, including inclination are fixedly connected on generator
Laser displacement sensor on stator core and rotor magnetic pole and the key phase for being fixedly connected on guide bearing top side, lead
Metallic target piece is fixed at the position of bearing side corresponding keys phase；On laser displacement sensor and key phase respectively
It is connected with No.1 radio receiving transmitting module and wireless transmitter module, PC machine is provided with outside generator, No. two nothings is provided in PC machine (6)
Line transceiver module.
In a kind of generator air gap measuring device above-mentioned, the laser displacement sensor is equipped with 8, and two two-phases
Pair and be uniformly arranged on stator core and rotor magnetic pole.
In a kind of generator air gap measuring device above-mentioned, the No.1 radio receiving transmitting module, wireless transmitter module
Radiofrequency signal is all made of with No. two radio receiving transmitting modules.
A kind of measurement method of generator air gap measuring device above-mentioned, steps are as follows:
A, when generator needs to measure the air gap, the revolving speed of generator is reduced, at this time the guide bearing side on generator
When the metallic target piece in face passes through key phase, key phase can send pulse signal by No.1 radio receiving transmitting module；PC
No. two radio receiving transmitting modules on machine receive the pulse signal that No.1 radio receiving transmitting module issues, and record repeatedly adjacent arteries and veins twice
The time between signal is rushed, the revolving speed of generator is calculated；
B, when the revolving speed of generator is tended at the uniform velocity, Xiang Jiguang after No. two radio receiving transmitting module return pulse signals in PC machine
No.1 radio receiving transmitting module on displacement sensor emits signal, so that the laser position on electricity generator stator core and rotor magnetic pole
Displacement sensor starts continuously to measure the air gap between stator core and rotor magnetic pole；
C, the laser displacement sensor on electricity generator stator core and rotor magnetic pole passes through the measurement data of the air gap
No.1 radio receiving transmitting module is sent into No. two radio receiving transmitting modules, and is entered in PC machine and be collected processing.
Compared with prior art, present invention improves over existing generator air gap measuring device and its measurement method,
Pulse can be launched when passing through guide bearing side metallic target piece by the key phase (PR9258/200-000) on guide bearing
Signal measures the time interval between pulse signal by continuous several times, the revolving speed of generator is calculated, when the revolving speed of generator
When tending to be steady；Laser displacement sensor (the model being oppositely arranged is tilted on electricity generator stator core and rotor magnetic pole again
Signal is sent for LK-G3000), the laser displacement sensor being oppositely arranged by two measures stator core and rotor magnetic respectively
The distance between pole, to obtain the air gap of generator；The error of laser displacement sensor in 1 microns, precision compared with
Height, and time of measuring is shorter, measurement efficiency is higher；The air gap of generator can be surveyed when generator rotates simultaneously
Amount, can reflect the situation of change of unit air gap in starting and later operational process, and measurement effect is preferable.In addition, of the invention
In laser displacement sensor be equipped with eight, and relatively uniform two-by-two (general power generation is set on stator core and rotor magnetic pole
There are four magnetic poles for machine unit), the air gap between adjacent four magnetic poles is measured, faster, precision is more for measuring speed
It is high；No.1 radio receiving transmitting module (model loRa1268), wireless transmitter module (model GW-T90) and No. two wireless receiving and dispatchings
Module (model loRa1268) is all made of radiofrequency signal, and signal transmitting is more stable.Therefore, the present invention can not only improve measurement
Accuracy also has the advantages that measurement efficiency is higher and measurement effect is preferable.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention；
Fig. 2 is control principle drawing of the invention.
The label in accompanying drawing is: 1- laser displacement sensor, 2- key phase, 3- metallic target piece, 4- No.1 are wirelessly received
Send out module, 5- wireless transmitter module, 6-PC machine, No. bis- radio receiving transmitting modules of 7-.
Specific embodiment
The present invention is further illustrated with reference to the accompanying drawings and examples, but be not intended as to the present invention limit according to
According to.
Embodiment.A kind of generator air gap measuring device and its measurement method constitute as illustrated in fig. 1 and 2, including incline
Tiltedly the laser displacement sensor 1 that is fixedly connected on electricity generator stator core and rotor magnetic pole and it is fixedly connected on guide bearing top
The key phase 2 of side is fixed with metallic target piece 3 at the position of guide bearing side corresponding keys phase 2；Laser displacement passes
It is connected separately with No.1 radio receiving transmitting module 4 and wireless transmitter module 5 on sensor 1 and key phase 2, is provided with outside generator
PC machine 6 is provided with No. two radio receiving transmitting modules 7 in PC machine 6.
The laser displacement sensor 1 is equipped with eight, and relatively and is uniformly arranged on stator core and rotor magnetic pole two-by-two
On；The No.1 radio receiving transmitting module 4, wireless transmitter module 5 and No. two radio receiving transmitting modules 7 are all made of radiofrequency signal.
A kind of measurement method of above-mentioned generator air gap measuring device, steps are as follows:
A, when generator needs to measure the air gap, the revolving speed of generator is reduced, at this time the guide bearing side on generator
When the metallic target piece in face passes through key phase, key phase can send pulse signal by No.1 radio receiving transmitting module；PC
No. two radio receiving transmitting modules on machine receive the pulse signal that No.1 radio receiving transmitting module issues, and record repeatedly adjacent arteries and veins twice
The time between signal is rushed, the revolving speed of generator is calculated；
B, when the revolving speed of generator is tended at the uniform velocity, Xiang Jiguang after No. two radio receiving transmitting module return pulse signals in PC machine
No.1 radio receiving transmitting module on displacement sensor emits signal, so that the laser position on electricity generator stator core and rotor magnetic pole
Displacement sensor starts continuously to measure the air gap between stator core and rotor magnetic pole；
C, the laser displacement sensor on electricity generator stator core and rotor magnetic pole passes through the measurement data of the air gap
No.1 radio receiving transmitting module is sent into No. two radio receiving transmitting modules, and is entered in PC machine and be collected processing.
Claims (4)
1. a kind of generator air gap measuring device, it is characterised in that: be fixedly connected on electricity generator stator core including inclination
With the laser displacement sensor (1) on rotor magnetic pole and it is fixedly connected on the key phase (2) of guide bearing top side, guide shaft
It holds and is fixed with metallic target piece (3) at the position of side corresponding keys phase (2)；Laser displacement sensor (1) is mutually sensed with key
It is connected separately with No.1 radio receiving transmitting module (4) and wireless transmitter module (5) on device (2), is provided with PC machine (6) outside generator,
No. two radio receiving transmitting modules (7) are provided in PC machine (6).
2. a kind of generator air gap measuring device according to claim 1, it is characterised in that: the laser displacement passes
Sensor (1) is equipped with 8, and relatively and is uniformly arranged on stator core and rotor magnetic pole two-by-two.
3. a kind of generator air gap measuring device according to claim 1, it is characterised in that: the No.1 is wirelessly received
Hair module (4), wireless transmitter module (5) and No. two radio receiving transmitting modules (7) are all made of radiofrequency signal.
4. according to claim 1 to a kind of measurement side of generator air gap measuring device described in any claim in 3
Method, which is characterized in that steps are as follows:
A, when generator needs to measure the air gap, the revolving speed of generator is reduced, at this time guide bearing side on generator
When metallic target piece passes through key phase, key phase can send pulse signal by No.1 radio receiving transmitting module；In PC machine
No. two radio receiving transmitting modules receive the pulse signal that No.1 radio receiving transmitting module issues, and record repeatedly adjacent two subpulse letter
Time between number calculates the revolving speed of generator；
B, when the revolving speed of generator is tended at the uniform velocity, to laser displacement after No. two radio receiving transmitting module return pulse signals in PC machine
No.1 radio receiving transmitting module on sensor emits signal, so that the laser displacement on electricity generator stator core and rotor magnetic pole passes
Sensor starts continuously to measure the air gap between stator core and rotor magnetic pole；
C, the measurement data of the air gap is passed through No.1 by the laser displacement sensor on electricity generator stator core and rotor magnetic pole
Radio receiving transmitting module is sent into No. two radio receiving transmitting modules, and is entered in PC machine and be collected processing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910773091.5A CN110332899A (en) | 2019-08-21 | 2019-08-21 | A kind of generator air gap measuring device and its measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910773091.5A CN110332899A (en) | 2019-08-21 | 2019-08-21 | A kind of generator air gap measuring device and its measurement method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110332899A true CN110332899A (en) | 2019-10-15 |
Family
ID=68150044
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910773091.5A Withdrawn CN110332899A (en) | 2019-08-21 | 2019-08-21 | A kind of generator air gap measuring device and its measurement method |
Country Status (1)
| Country | Link |
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| CN (1) | CN110332899A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902853A (en) * | 2021-01-28 | 2021-06-04 | 四川恒诚达科技有限公司 | Hydraulic generator rotor magnetic pole laser ranging system and method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4309721A1 (en) * | 1993-03-25 | 1994-09-29 | Magnetbahn Gmbh | Method for determining the air gap between magnets and stators of linear motor drives |
| DE102011077736A1 (en) * | 2011-06-17 | 2012-12-20 | Siemens Aktiengesellschaft | distance sensor |
| CN104154853A (en) * | 2014-08-26 | 2014-11-19 | 上海瑞视仪表电子有限公司 | Method for measuring wind driven generator air gap through eddy current sensors |
| CN207113782U (en) * | 2017-07-20 | 2018-03-16 | 国家电网公司 | A kind of rotor clearance measurement tool |
| CN108418351A (en) * | 2018-01-12 | 2018-08-17 | 远景能源（江苏）有限公司 | Wind-driven generator air gap real-time detecting system and method |
| CN109341510A (en) * | 2018-10-31 | 2019-02-15 | 上海瑞视仪表电子有限公司 | A kind of wind-driven generator measurement of air gap device |
| US10240911B2 (en) * | 2017-06-12 | 2019-03-26 | Advanced Gauging Technologies, LLC | Laser gauge with full air gap measurement range |
| CN109916357A (en) * | 2019-02-21 | 2019-06-21 | 西安理工大学 | Power station boiler air pre-heater gap detection method based on Multi-sensor Fusion |
-
2019
- 2019-08-21 CN CN201910773091.5A patent/CN110332899A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4309721A1 (en) * | 1993-03-25 | 1994-09-29 | Magnetbahn Gmbh | Method for determining the air gap between magnets and stators of linear motor drives |
| DE102011077736A1 (en) * | 2011-06-17 | 2012-12-20 | Siemens Aktiengesellschaft | distance sensor |
| CN104154853A (en) * | 2014-08-26 | 2014-11-19 | 上海瑞视仪表电子有限公司 | Method for measuring wind driven generator air gap through eddy current sensors |
| US10240911B2 (en) * | 2017-06-12 | 2019-03-26 | Advanced Gauging Technologies, LLC | Laser gauge with full air gap measurement range |
| CN207113782U (en) * | 2017-07-20 | 2018-03-16 | 国家电网公司 | A kind of rotor clearance measurement tool |
| CN108418351A (en) * | 2018-01-12 | 2018-08-17 | 远景能源（江苏）有限公司 | Wind-driven generator air gap real-time detecting system and method |
| CN109341510A (en) * | 2018-10-31 | 2019-02-15 | 上海瑞视仪表电子有限公司 | A kind of wind-driven generator measurement of air gap device |
| CN109916357A (en) * | 2019-02-21 | 2019-06-21 | 西安理工大学 | Power station boiler air pre-heater gap detection method based on Multi-sensor Fusion |
Non-Patent Citations (1)
| Title |
|---|
| 李鑫: "直线电机气隙检测装置", 《城市轨道交通研究》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112902853A (en) * | 2021-01-28 | 2021-06-04 | 四川恒诚达科技有限公司 | Hydraulic generator rotor magnetic pole laser ranging system and method |
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Application publication date: 20191015 |