CN106225683B - Vertical hydrogenerator stator silicon steel plate radial displacement detection method - Google Patents
Vertical hydrogenerator stator silicon steel plate radial displacement detection method Download PDFInfo
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- CN106225683B CN106225683B CN201610701204.7A CN201610701204A CN106225683B CN 106225683 B CN106225683 B CN 106225683B CN 201610701204 A CN201610701204 A CN 201610701204A CN 106225683 B CN106225683 B CN 106225683B
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- 229910000976 Electrical steel Inorganic materials 0.000 title claims abstract description 206
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 94
- 238000001514 detection method Methods 0.000 title claims abstract description 41
- 238000009413 insulation Methods 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 5
- 239000010703 silicon Substances 0.000 claims description 5
- 238000000034 method Methods 0.000 abstract description 16
- 238000005259 measurement Methods 0.000 description 17
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 14
- 238000007689 inspection Methods 0.000 description 14
- 239000000523 sample Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000004451 qualitative analysis Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000001066 destructive effect Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000009422 external insulation Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- XWHPIFXRKKHEKR-UHFFFAOYSA-N iron silicon Chemical group [Si].[Fe] XWHPIFXRKKHEKR-UHFFFAOYSA-N 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 235000013372 meat Nutrition 0.000 description 1
- 210000003205 muscle Anatomy 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000032696 parturition Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004445 quantitative analysis Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/022—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness by means of tv-camera scanning
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- Manufacture Of Motors, Generators (AREA)
- Instruments For Viewing The Inside Of Hollow Bodies (AREA)
Abstract
The embodiment of the invention provides a kind of vertical hydrogenerator stator silicon steel plate radial displacement detection methods, this method comprises: taking pictures using industrial endoscope between the silicon steel sheet each stator slot in End zone of stator core, obtain the photo of silicon steel sheet between each stator slot；In the industrial endoscope, the measuring basis line of silicon steel sheet between the current location and each stator slot of the teeth portion of silicon steel sheet between each stator slot is determined in captured photo, the radial displacement distance of silicon steel sheet between each stator slot is determined according to the current location of the measuring basis line and the teeth portion, wherein, position of the measuring basis line where when silicon steel sheet is not subjected to displacement between each stator slot.Silicon steel sheet radial displacement detection can be completed by industrial endoscope in the program, avoids passing through and is manually checked and measured, and improves convenience, the accuracy of silicon steel sheet radial displacement detection.
Description
Technical field
The present invention relates to technical field of hydraulic generators, in particular to a kind of vertical hydrogenerator stator silicon steel plate is radial
Displacement detecting method.
Background technique
Large vertical water turbine generator is generally made of the part such as stator, rotor, iron core, coil, each auxiliary system, specifically
As shown in Figure 1, and generator unit stator mainly includes the important components such as base 1, iron core, coil, wherein stator core is generator
Important component, be the chief component of magnetic circuit and to fixed winding, stator core is generally by silicon steel sheet vent segment, fixed
Position muscle, tooth support 2, tight screw rod 3, pressure refer to that the dress of the components such as 4 is pressed, and positioning bar is fixed on field ring by fixed plate, silicon
Iron core is compacted by upper and lower tooth support and stretching screw whole in the dovetail of positioning bar by steel disc, vent segment closed assembly
Body.In generator operation, iron core bears the comprehensive function of mechanical force, thermal stress and electromagnetic force.
For vertical hydrogenerator since unit volume is huge, startup-shutdown is frequent, the reasons such as stator winding heat dissipation difficulty, power generation
Machine stator iron core silicon steel sheet thermal expansion and contraction is very frequent, especially the silicon steel sheet of iron core upper and lower end parts, what is expanded with heat and contract with cold
In the process, process is stretched repeatedly, it is easy to which radial (to rotor-side) is mobile, incised wound stator bar insulation.Especially operation many years
Generator, since stator surface greasy dirt is more, radiating condition is poor, the continuous aging of silicon steel sheet insulation between plates, and eddy-current loss increases, fixed
Sub- iron core temperature rise constantly increases, and forms vicious circle, and stator silicon steel plate radially slides displacement aggravation, and over time, displacement skids off
Silicon steel sheet will hurt stator bar insulation, it is serious to will cause stator single-phase earthing fault.Therefore, stator silicon steel plate is monitored
Skid off displacement situation, effectively monitor stator core operating condition, it is significant to the safe operation of hydrogenerator.
As shown in Fig. 2, stator core is by blocks of silicon steel sheet 201 (as shown in Fig. 2, silicon steel sheet teeth portion 203, dovetail slot
204) it is embedded in silicon steel sheet slot bottom 202.If radial displacement sliding occurs for silicon steel sheet, bar insulation will be cut.General voltage class is
The insulation thickness of 10 kilovolts of stator bar is about 4mm, according to the requirement of relevant criterion, if the unilateral damage of main insulation of bar is more than
25%, i.e. 1mm is just replaced.Certainly, there is also external insulations, such as semiconductor pads between stator bar and iron core silicon steel sheet
Item etc., still, as long as there is subtle slide displacement in iron core silicon steel sheet anyway, even only 2-3mm, it can be to stator line
Stick causes destructive damage.And after if stator silicon steel plate gets rid of the constraint of positioning bar, skid off displacement be one slowly and hold
Continuous process, and skid off displacement scale and speed is difficult artificially to measure and monitoring.And due to hydrogenerator rotor it
Between gap it is very narrow, the offset phenomena that skids off of stator silicon steel plate is difficult with the naked eye to find, and this skids off phenomenon also very
Difficulty is found by electrically monitoring system or test data.
Currently, artificial detection, light maintenance when the detection method that hydraulic generator stator silicon steel sheet skids off displacement mainly has overhaul
When stator core back detection etc., and these detection methods can only qualitative analysis stator silicon steel plate skid off displacement situation, cannot
The displacement that skids off of accurate quantitative analysis measurement stator silicon steel plate, can not accurate evaluation stator bar insulate condition in damaged, have very
Big limitation.
For example, the method for artificial detection is when overhaul: when major overhaul, after rotor is hung out, manual inspection is fixed first
The phenomenon that sub- upper and lower end parts iron core is skidded off with the presence or absence of overheat, core slackness, silicon steel sheet movement.When there are silicon steel sheets for artificial judgment
After movement skids off phenomenon, measured using tools such as amesdials to amount of movement is skidded off.But this detection method is to pass through meat
The modes such as eye observation, hand touch carry out qualitative analysis, and there are subjectivities, are unable to judge accurately silicon steel sheet movement and skid off situation, and
By the way of micrometer manual measurement, there are large error, can not precise measurement silicon steel sheet skid off amount of movement.It is most important
It is that this detection method needs carry out after major overhaul, rotor are hung out, and there are biggish limitations.Major overhaul interval one
As be 5-8, silicon steel sheet had existed to those move and skid off the unit of defect, this detection method periodically can not be monitored accurately
The defect condition of iron core, there are biggish security risks.
Stator core back detection method is: in the annual regular inspection of unit, opening the backboard at stator core back
After air cooler, displacement situation is skidded off to core slackness and silicon steel sheet and is checked, discovery has loosening offset phenomena, with clearance gauge and
Depthometer carries out local measurement.But the major defect of the detection method is, the unit regular inspection duration is generally 7 days or so, such as
Components, workload and the great work intensities such as air cooler are removed in this short time；Also, stator core back space is small, inconvenient
In manual inspection and measurement；Moreover, manually measuring amount of movement with clearance gauge and depthometer, precision is not high, and accuracy is inadequate.
By the analysis above to currently used several detection methods, it is found that overhaul hangs out the detection mode after rotor,
Time interval is too long, is unfavorable for the monitoring of stator core, especially has existed the unit that silicon steel sheet displacement skids off phenomenon.Light maintenance
The detection method of regular inspection core-back removes the components such as air cooler, workload due to the short time limit of unit regular inspection in a short time
It is big with intensity, and working space is small, is unfavorable for personnel inspection measurement.Most of all, these existing several detection methods
It is all manual inspection and measurement, precision is not high, and accuracy is inadequate.
Summary of the invention
The embodiment of the invention provides a kind of vertical hydrogenerator stator silicon steel plate radial displacement detection methods, to solve
Technical problem inconvenient, inaccurate in silicon steel sheet radial displacement detection in the prior art.This method comprises: at stator core end
Portion takes pictures between the silicon steel sheet each stator slot using industrial endoscope, obtains the photo of silicon steel sheet between each stator slot；Institute
It states in industrial endoscope, the current location of the teeth portion of silicon steel sheet and each stator slot between each stator slot is determined in captured photo
Between silicon steel sheet measuring basis line, silicon steel between each stator slot is determined according to the current location of the measuring basis line and the teeth portion
The radial displacement distance of piece, wherein position of the measuring basis line where when silicon steel sheet is not subjected to displacement between each stator slot.
In one embodiment, the silicon steel sheet each stator slot is clapped using industrial endoscope in End zone of stator core
According to obtaining between each stator slot after the photo of silicon steel sheet, further includes: compiled between the photo of silicon steel sheet each stator slot
Number, the number of the photo of silicon steel sheet is consistent with the number of the stator slot between each stator slot；Store silicon steel sheet between each stator slot
Photo.
In one embodiment, in the industrial endoscope, silicon steel between each stator slot is determined in captured photo
The measuring basis line of silicon steel sheet between the current location of the teeth portion of piece and each stator slot, according to the measuring basis line and the teeth portion
Current location determine the radial displacement distance of silicon steel sheet between each stator slot, comprising: it is each fixed to be found according to the number of stator slot
The photo of silicon steel sheet between pilot trench；For the photo of silicon steel sheet between each stator slot, determine that this is fixed according to displacement trace in photo
The current location of the teeth portion of silicon steel sheet between pilot trench, the distance between current location of the measuring basis line and the teeth portion is true
It is set to the radial displacement distance of silicon steel sheet between the stator slot.
In one embodiment, the silicon steel sheet each stator slot is clapped using industrial endoscope in End zone of stator core,
It include: to be taken pictures using industrial endoscope interval preset time between the silicon steel sheet each stator slot in End zone of stator core；It is described
Vertical hydrogenerator stator silicon steel plate radial displacement detection method, further includes: each stator is found according to the number of stator slot
The photo of silicon steel sheet between slot；For the photo of silicon steel sheet between each stator slot, determined respectively in the adjacent photo taken pictures twice
The current location of the teeth portion of silicon steel sheet between the stator slot determines the difference of the current location of the teeth portion in adjacent photo of taking pictures twice
Shift length of the silicon steel sheet in a preset time between the stator slot；According to the duration of a preset time and
Shift length of the silicon steel sheet in a preset time between the stator slot calculates the displacement speed of silicon steel sheet between the stator slot
Degree.
In one embodiment, the measuring basis line of silicon steel sheet between each stator slot is determined in captured photo, comprising:
In captured photo, for each stator slot, by the position where the teeth portion for the silicon steel sheet not being subjected to displacement between the stator slot
Set the measuring basis line of silicon steel sheet between being determined as the stator slot.
In one embodiment, the radial displacement distance of silicon steel sheet is the insulation status for judging stator bar between each stator slot
Foundation.
In embodiments of the present invention, the silicon steel sheet each stator slot is clapped using industrial endoscope in End zone of stator core
According to, in industrial endoscope, can be determined in captured photo between each stator slot the current location of the teeth portion of silicon steel sheet and
The measuring basis line of silicon steel sheet between each stator slot, and then determined between each stator slot according to the current location of measuring basis line and teeth portion
Silicon steel sheet radial displacement detection can be completed by industrial endoscope in the radial displacement distance of silicon steel sheet, avoid passing through artificial
It is checked and is measured, improve convenience, the accuracy of silicon steel sheet radial displacement detection.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, not
Constitute limitation of the invention.In the accompanying drawings:
Fig. 1 is a kind of structural schematic diagram of large vertical water turbine generator in the prior art；
Fig. 2 is a kind of schematic diagram of stator core silicon steel sheet in the prior art；
Fig. 3 is a kind of vertical hydrogenerator stator silicon steel plate radial displacement detection method provided in an embodiment of the present invention
Flow chart；
Fig. 4 is a kind of schematic diagram of vertical hydrogenerator stator core end provided in an embodiment of the present invention；
Fig. 5 is a kind of signal using stator core end captured by industrial endoscope provided in an embodiment of the present invention
Figure；
Fig. 6 is a kind of specific vertical hydrogenerator stator silicon steel plate radial displacement detection provided in an embodiment of the present invention
The flow chart of method.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, right below with reference to embodiment and attached drawing
The present invention is described in further details.Here, exemplary embodiment and its explanation of the invention is used to explain the present invention, but simultaneously
It is not as a limitation of the invention.
In embodiments of the present invention, a kind of vertical hydrogenerator stator silicon steel plate radial displacement detection method is provided,
As shown in figure 3, this method comprises:
Step 301: being taken pictures, obtained each between the silicon steel sheet each stator slot using industrial endoscope in End zone of stator core
The photo of silicon steel sheet between a stator slot；
Step 302: in the industrial endoscope, the teeth portion of silicon steel sheet between each stator slot is determined in captured photo
Current location and each stator slot between silicon steel sheet measuring basis line, according to the present bit of the measuring basis line and the teeth portion
Set the radial displacement distance of silicon steel sheet between determining each stator slot, wherein silicon steel sheet is not between each stator slot for the measuring basis line
Position where when being subjected to displacement.
Process as shown in Figure 3 in End zone of stator core it is found that in embodiments of the present invention, use industrial endoscope to each
Silicon steel sheet between a stator slot is taken pictures, and in industrial endoscope, silicon steel between each stator slot can be determined in captured photo
The measuring basis line of silicon steel sheet between the current location of the teeth portion of piece and each stator slot, and then working as according to measuring basis line and teeth portion
Front position determines the radial displacement distance of silicon steel sheet between each stator slot, i.e., silicon steel sheet radial direction position can be completed by industrial endoscope
Detection is moved, is avoided passing through and is manually checked and measured, convenience, the accuracy of silicon steel sheet radial displacement detection are improved.
When it is implemented, the soft probe of industrial endoscope is put into stator core end by the air gap of rotor, in turn
It is taken pictures using industrial endoscope between the silicon steel sheet each stator slot in stator core end, between silicon different stator slots
When steel disc is taken pictures, keep distance, shooting angle, light of probe camera lens etc. consistent.
When it is implemented, in industrial endoscope, for ease of calculation between each stator slot silicon steel sheet radial displacement distance,
In the present embodiment, it is taken pictures, is obtained each between the silicon steel sheet each stator slot using industrial endoscope in End zone of stator core
Between stator slot after the photo of silicon steel sheet, further includes: the photo of silicon steel sheet each stator slot is numbered, each stator slot
Between silicon steel sheet photo number it is consistent with the number of the stator slot；Store the photo of silicon steel sheet between each stator slot.
It obtains between each stator slot after the photo of silicon steel sheet, in the industrial endoscope, in captured photo
The measuring basis line for determining silicon steel sheet between the current location and each stator slot of the teeth portion of silicon steel sheet between each stator slot, according to the survey
The current location of amount reference line and the teeth portion determines the radial displacement distance of silicon steel sheet between each stator slot, comprising: according to stator
The number of slot finds the photo of silicon steel sheet between each stator slot；For the photo of silicon steel sheet between each stator slot, the root in photo
The current location that the teeth portion of silicon steel sheet between the stator slot is determined according to displacement trace, by working as the measuring basis line and the teeth portion
The distance between front position is determined as the radial displacement distance of silicon steel sheet between the stator slot.
It, can be in photo specifically, the photo of silicon steel sheet between each stator slot can be found according to the number of stator slot
The measuring basis line for determining silicon steel sheet between each stator slot, for example, for each stator slot, this is determined in captured photo
Position where the teeth portion for the silicon steel sheet not being subjected to displacement between pilot trench is determined as the measuring basis of all silicon steel sheets between the stator slot
Line.Specifically, as shown in Figure 4,5, the silicon steel sheet of stator core end be it is stepped, each ladder is blocks of silicon steel
Piece closed assembly into (core lamination stack as shown in 401 in Fig. 4,402 be the silicon steel sheet skidded off, and 403 refer to press, and 404 be tooth support, 405
For stretching screw), the silicon steel sheet not being subjected to displacement, each stepped ends should be completely it is neat, on same straight line, such as
In Fig. 5 503 shown in, thus, this straight line is measuring basis line.
Specifically, the current location of the teeth portion of silicon steel sheet between the stator slot can be determined according to displacement trace in photo,
As shown in Figure 4,5,501 be whole folded silicon steel sheet, and after silicon steel sheet 402 is subjected to displacement, silicon steel sheet has the trace of displacement, for example, oily
Paint falls off, and the current location of the teeth portion of silicon steel sheet can be determined according to the trace of displacement, as shown in dotted line 502 in Fig. 5, measurement
The distance between the current location of reference line and teeth portion H is the radial displacement distance of silicon steel sheet between the stator slot.
When it is implemented, being a very slow process, manual measurement since stator core silicon steel sheet skids off offset phenomena
Displacement process can not be skidded off to iron core silicon steel sheet at all to measure, compare, analyze and supervise, can not be insulated to stator bar
Condition in damaged is assessed, therefore, in the present embodiment, in End zone of stator core using industrial endoscope between each stator slot
Silicon steel sheet clap, comprising: End zone of stator core using industrial endoscope interval preset time between the silicon steel each stator slot
Piece is taken pictures；The vertical hydrogenerator stator silicon steel plate radial displacement detection method, further includes: looked for according to the number of stator slot
To the photo of silicon steel sheet between each stator slot；For the photo of silicon steel sheet between each stator slot, in the adjacent photo taken pictures twice
The middle current location for determining the teeth portion of silicon steel sheet between the stator slot respectively, by the present bit of the teeth portion in adjacent photo of taking pictures twice
The difference set is determined as shift length of the silicon steel sheet in a preset time between the stator slot；According to one it is described default when
Between between the stator slot shift length of the silicon steel sheet in a preset time, calculate the displacement of silicon steel sheet between the stator slot
Speed.
Specifically, in End zone of stator core using industrial endoscope interval preset time between the silicon steel sheet each stator slot
It takes pictures, for example, can take pictures in regular inspection annually between the silicon steel sheet each stator slot, obtains the photo repeatedly shot
Afterwards, it for the photo of silicon steel sheet between each stator slot, can be determined respectively in the adjacent photo taken pictures twice between the stator slot
The difference of the current location of teeth portion in adjacent photo of taking pictures twice is determined as the stator slot by the current location of the teeth portion of silicon steel sheet
Between shift length of the silicon steel sheet in a preset time, for example, using the distance measurement function of industrial endoscope, in one test
Measuring dotted line (i.e. the once current location of the teeth portion in shooting photo) and the vertical range of measuring basis line is silicon steel sheet
Shift length H1 skids off position to silicon steel sheet and marks, when generator unit silicon steel sheet checks next time, with same method,
Using the distance measurement function of industrial endoscope, the shift length for measuring silicon steel sheet is H2, then, it is fixed herein during this is checked twice
The shift length of sub- silicon steel sheet is H=H2-H1, and then is existed according to silicon steel sheet between the duration and the stator slot of a preset time
Shift length in one preset time calculates velocity of displacement of the silicon steel sheet in a preset time between the stator slot, root
Can analyze, compare according to the velocity of displacement, supervise stator core silicon steel sheet skid off displacement process.
When it is implemented, measure silicon steel sheet between each stator slot radial displacement distance after, can be by silicon steel between each stator slot
Foundation of the radial displacement distance of piece as the insulation status for judging stator bar, skids off displacement for example, existing in end iron core
Phenomenon is taken pictures after inspection with industrial endoscope, and it is serious that discovery stator A slot silicon steel sheet skids off displacement, is shot and is recorded with endoscope, looked for
The measuring basis line of quasi- silicon steel sheet, skidding off distance with distance measurement function measurement is H1=1.6mm.After 1 year, with same method, survey
It is H2=3.6mm that amount A slot silicon steel sheet, which skids off displacement,.And the overall insulation of the generator unit bar is with a thickness of 5mm, silicon steel sheet cunning
Displacement reaches H2=3.6mm out, according to related regulation prescribed requirement, it is necessary to carry out bar replacement and iron core processing, otherwise will
Cause the major accidents such as single-phase earthing.Also, by the comparison of the displacement of front and back twice, it can be calculated that 1 year when
In, it is H=H2-H1=3.6-1.6=2mm that A slot silicon steel sheet, which skids off displacement, it is possible thereby to which substantially understanding silicon steel sheet skids off position
The speed of shifting, the speed that silicon steel sheet skids off displacement can have the silicon steel sheet for skidding off offset phenomena detection to refer to for other.
When it is implemented, above-mentioned industrial endoscope can be the handhold portable number for the detection of generator unit stator silicon steel sheet
Word advanced digital type Industrial Videoprobe's, major parameter are as follows: probe outer diameter is 5.0mm；It pops one's head in effective active length
For 3m；The replaceable Liar adapter of probe end has matched side-view mirror and Euthyscope, is able to satisfy measurement generator
The needs of different parts；Pixel is not less than 440,000；Dynamic image, which has, to be not less than 3 times of adjustable amplification imaging function, is not less than
The delay exposure function of 16s；With image processing system and image storage system.Video probe terminal guide mode is manipulator
Guide motor built in handle drives；Guide direction degree is 360 ° omni-directional continuous steerable, and guided bend degree is greater than 150 °, is oriented to curved
Bilge radius is less than 30mm；With 5in digital lcd, can be watched by any angle, brightness is adjustable, have anti-scratch protection screen and
Sky shade.It extends the sighting distance of human eye, reduces the dead angle of eye-observation, the feelings inside energy clear and accurate ground observation device
Condition can shoot and record observed situation, and can handle the photo or video of shooting.
Above-mentioned vertical hydrogenerator stator silicon steel plate radial displacement detection method is described below in conjunction with specific example, such as
Shown in Fig. 6, method includes the following steps:
Compressor emergency shutdown, and carry out safety measure, related preparation include preparing industrial endoscope, mobile power source, various
Camera and dismounting unit correlation ancillary equipment etc..Then each slot of stator is numbered, photographs to record each slot silicon steel sheet
Displacement situation, and record is numbered to photo, notice that photo number is corresponded with the practical slot number of stator.It is found accurately in photo
The current location of the measuring basis line of displacement silicon steel sheet and the teeth portion of silicon steel sheet is skidded off, the teeth portion of measuring basis line and silicon steel sheet
The distance between current location is the distance H1 for measuring silicon steel sheet and being subjected to displacement.According to the total insulation thickness of stator bar, knot
The measurement result that silicon steel sheet skids off displacement is closed, judges stator bar insulation condition in damaged, and judge whether to need to iron core and line
Stick is handled, if desired, is then handled iron core and bar；If not needing, unit restores.It carries out shutting down inspection next time
It looks into, still completes corresponding preparation, the displacement situation for measuring flume silicon steel sheet of taking pictures, hair when emphasis photographs to record last time inspection
The distance H2 that silicon steel sheet is subjected to displacement when giving birth to the position of displacement, and measuring this inspection.Before and after the silicon steel sheet for comparing same position
The measurement result checked twice calculates the distance H=H2-H1 that silicon steel sheet during inspection is separated by twice skids off displacement.According to front and back
Measurement result twice, that substantially estimates silicon steel sheet skids off velocity of displacement, has had the silicon steel sheet for skidding off offset phenomena for other
Detection refers to.
In embodiments of the present invention, the silicon steel sheet each stator slot is clapped using industrial endoscope in End zone of stator core
According to, in industrial endoscope, can be determined in captured photo between each stator slot the current location of the teeth portion of silicon steel sheet and
The measuring basis line of silicon steel sheet between each stator slot, and then determined between each stator slot according to the current location of measuring basis line and teeth portion
Silicon steel sheet radial displacement detection can be completed by industrial endoscope in the radial displacement distance of silicon steel sheet, avoid passing through artificial
It is checked and is measured, improve convenience, the accuracy of silicon steel sheet radial displacement detection.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the embodiment of the present invention can have various modifications and variations.All within the spirits and principles of the present invention, made
Any modification, equivalent substitution, improvement and etc. should all be included in the protection scope of the present invention.
Claims (4)
1. a kind of vertical hydrogenerator stator silicon steel plate radial displacement detection method characterized by comprising
It is taken pictures using industrial endoscope between the silicon steel sheet each stator slot in End zone of stator core, obtains silicon between each stator slot
The photo of steel disc；
In the industrial endoscope, determined in captured photo between each stator slot the current location of the teeth portion of silicon steel sheet and
The measuring basis line of silicon steel sheet between each stator slot determines each stator according to the current location of the measuring basis line and the teeth portion
The radial displacement distance of silicon steel sheet between slot, wherein measuring basis line silicon steel sheet between each stator slot is not subjected to displacement when institute
Position；
It is taken pictures using industrial endoscope between the silicon steel sheet each stator slot in End zone of stator core, obtains silicon between each stator slot
After the photo of steel disc, further includes:
The photo of silicon steel sheet each stator slot is numbered, the number of the photo of silicon steel sheet and the stator between each stator slot
The number of slot is consistent；
Store the photo of silicon steel sheet between each stator slot；
In the industrial endoscope, determined in captured photo between each stator slot the current location of the teeth portion of silicon steel sheet and
The measuring basis line of silicon steel sheet between each stator slot determines each stator according to the current location of the measuring basis line and the teeth portion
The radial displacement distance of silicon steel sheet between slot, comprising:
The photo of silicon steel sheet between each stator slot is found according to the number of stator slot；
For the photo of silicon steel sheet between each stator slot, the tooth of silicon steel sheet between the stator slot is determined according to displacement trace in photo
The distance between the measuring basis line and current location of the teeth portion are determined as silicon between the stator slot by the current location in portion
The radial displacement distance of steel disc.
2. vertical hydrogenerator stator silicon steel plate radial displacement detection method as described in claim 1, which is characterized in that
It is taken pictures using industrial endoscope between the silicon steel sheet each stator slot in End zone of stator core, comprising:
It is taken pictures using industrial endoscope interval preset time between the silicon steel sheet each stator slot in End zone of stator core；
The vertical hydrogenerator stator silicon steel plate radial displacement detection method, further includes:
The photo of silicon steel sheet between each stator slot is found according to the number of stator slot；
For the photo of silicon steel sheet between each stator slot, silicon steel between the stator slot is determined respectively in the adjacent photo taken pictures twice
The difference of the current location of teeth portion in adjacent photo of taking pictures twice is determined as silicon between the stator slot by the current location of the teeth portion of piece
Shift length of the steel disc in a preset time；
According to displacement of the silicon steel sheet in a preset time between the duration and the stator slot of a preset time away from
From calculating the velocity of displacement of silicon steel sheet between the stator slot.
3. the vertical hydrogenerator stator silicon steel plate radial displacement detection method as described in any one of claims 1 to 2,
It is characterized in that, the measuring basis line of silicon steel sheet between each stator slot is determined in captured photo, comprising:
It, will be where the teeth portion for the silicon steel sheet that be not subjected to displacement between the stator slot for each stator slot in captured photo
Position be determined as the measuring basis lines of all silicon steel sheets between the stator slot.
4. the vertical hydrogenerator stator silicon steel plate radial displacement detection method as described in any one of claims 1 to 2,
It is characterized in that, the radial displacement distance of silicon steel sheet is to judge the foundation of the insulation status of stator bar between each stator slot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| CN1442683A (en) * | 2003-04-17 | 2003-09-17 | 上海交通大学 | Large power generator stator winding terminal part vibration on line monitoring method |
| CN102944689A (en) * | 2012-11-13 | 2013-02-27 | 江苏科技大学 | Brushless direct-current motor rotation speed detection device adopting charge coupled device (CCD) camera and method |
| CN104713478A (en) * | 2015-03-05 | 2015-06-17 | 安徽大学 | Linear motor rotor position measuring method |
| CN105698711A (en) * | 2016-03-14 | 2016-06-22 | 上海电气集团股份有限公司 | Device and method of online monitoring verticality of generator stator core |
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| JPS62293787A (en) * | 1986-06-13 | 1987-12-21 | Nissan Motor Co Ltd | Displacement sensor |
| JP4162218B2 (en) * | 2003-04-03 | 2008-10-08 | 日本電信電話株式会社 | Multi-degree-of-freedom ultrasonic motor rotor attitude angle measuring method and apparatus |
| CN201277952Y (en) * | 2008-10-24 | 2009-07-22 | 陈百捷 | Movement supporting mechanism for silicon chip surface observation |
| CN103604378B (en) * | 2013-11-22 | 2016-09-28 | 杭州长庚测量技术有限公司 | A kind of stalloy laser thickness measuring apparatus |
| JP2015197412A (en) * | 2014-04-03 | 2015-11-09 | 株式会社デンソー | Circularity measuring method |
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|---|---|---|---|---|
| CN1442683A (en) * | 2003-04-17 | 2003-09-17 | 上海交通大学 | Large power generator stator winding terminal part vibration on line monitoring method |
| CN102944689A (en) * | 2012-11-13 | 2013-02-27 | 江苏科技大学 | Brushless direct-current motor rotation speed detection device adopting charge coupled device (CCD) camera and method |
| CN104713478A (en) * | 2015-03-05 | 2015-06-17 | 安徽大学 | Linear motor rotor position measuring method |
| CN105698711A (en) * | 2016-03-14 | 2016-06-22 | 上海电气集团股份有限公司 | Device and method of online monitoring verticality of generator stator core |
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