CN1074973A - The remote eddy current and the supersonic detection device that are used for turbine generator guard ring - Google Patents
The remote eddy current and the supersonic detection device that are used for turbine generator guard ring Download PDFInfo
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- CN1074973A CN1074973A CN92105760A CN92105760A CN1074973A CN 1074973 A CN1074973 A CN 1074973A CN 92105760 A CN92105760 A CN 92105760A CN 92105760 A CN92105760 A CN 92105760A CN 1074973 A CN1074973 A CN 1074973A
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- balladeur train
- retaining ring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/26—Arrangements for orientation or scanning by relative movement of the head and the sensor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/72—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables
- G01N27/82—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws
- G01N27/90—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating magnetic variables for investigating the presence of flaws using eddy currents
- G01N27/9013—Arrangements for scanning
- G01N27/902—Arrangements for scanning by moving the sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/04—Analysing solids
- G01N29/06—Visualisation of the interior, e.g. acoustic microscopy
- G01N29/0609—Display arrangements, e.g. colour displays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
- G01N29/22—Details, e.g. general constructional or apparatus details
- G01N29/223—Supports, positioning or alignment in fixed situation
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/02—Indexing codes associated with the analysed material
- G01N2291/028—Material parameters
- G01N2291/02827—Elastic parameters, strength or force
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/044—Internal reflections (echoes), e.g. on walls or defects
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/04—Wave modes and trajectories
- G01N2291/048—Transmission, i.e. analysed material between transmitter and receiver
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2291/00—Indexing codes associated with group G01N29/00
- G01N2291/26—Scanned objects
- G01N2291/263—Surfaces
- G01N2291/2634—Surfaces cylindrical from outside
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- Power Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Acoustics & Sound (AREA)
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
A kind ofly be used to detect the computer control scanner system of large cylinder such as generator guard ring.This system is a characteristic with closely spaced scanner, and scanner can be carried simultaneously and carry out at the bottom of the required whirlpool of retaining ring inspection and ultrasonic experiment probe.Scanner is the unit controls of main body by a computer, and location coding is arranged, accurately to indicate the position of probe on retaining ring.Scanner can move along its axial length direction straight line, thereby once just carry out inspection in the process along the whole circumference rotation of retaining ring.Special data capture and Presentation Function can show the information that gets from probe with scanning by automatic data collection.Retaining ring can check in rotor is in the generator unit stator thorax that this just not only saves time but also laborsaving, perhaps also can check when rotor is extracted out.
Description
The present invention relates to a kind of detection system of large cylinder, especially for eddy current and the ultrasonic comprehensive detection system and the method for turbine generator guard ring.
Be installed in the generator's motor shaft end, be used for protecting and the generator amature retaining ring of fixed rotor winding, need periodically to detect to confirm whether retaining ring crackle occur.In general, this just requires the power station to extract rotor out from generator unit stator, so that increase the channel space of contact retaining ring.Can find that the retaining ring state is an acceptable under a lot of situations, can continue operation, rotor reloads stator and will not take off by retaining ring.Under other situation, and on the retaining ring surface that the rotor winding contacts crackle has appearred, these crackles normally begin from some position of retaining ring internal diameter.
For fear of causing that retaining ring damages because crackle spreads, periodically detection is carried out in a lot of power station.Because it is always not possible to extract retaining ring, typical method is to carry out ultrasonic examination, and high-frequency ultrasonic signal is radially imported from circumferential its internal diameter circumference of retaining ring external diameter.By monitoring ultrasound traveling time, add understanding to the retaining ring size characteristics, just can find the fine crack that has produced.Yet these methods that before just had require rotor is extracted out from generator usually, so that carry out these detections.This just relates to not only time-consuming but also needs careful operation to be avoided in extraction process any damage to rotor or stator.Therefore, wishing has a kind of system, can carry out these detections and don't must extract rotor out.
An elementary object of the present invention just provides a kind of detection system of large cylinder, and it does not need this cylindrical body is extracted out from its normal position.
Another target of the present invention is to guide eddy current and ultrasonic tesint probe into retaining ring simultaneously from afar, and generator guard ring is detected.
By the present invention, obtained above-mentioned, and other target.Manufactured according to the present invention, in brief, be a kind of system that is used for detecting generator amature retaining ring with outer diametric plane and aperture surface, being characterized as of this detection system: be used for finding simultaneously outside the originally probe mechanism of crackle on one's body of diametric plane, aperture surface and cylindrical body; Be used for above-mentioned probe mechanism is transported to the sweep mechanism of cylinder, this sweep mechanism both can be along cylindrical circumferential registration, again can be along cylindrical length location; With the position indicating device that decides above-mentioned sweep mechanism position on cylindrical body; And the mechanism that controls this detection system operation from a distant place.
By reading following detailed and contact only with the schematic representation of case representation,
Can make all kinds of other targets of the present invention, characteristics and superiority become more obvious, wherein:
Fig. 1 is a retaining ring detection system general illustration of the present invention;
Fig. 2 is the isometric map of retaining ring scanner assembling of the present invention;
Fig. 3 is the detailed view of the interior balladeur train assembling shown in Fig. 2;
Fig. 4 is the detailed maps that eddy current/ultrasonic wave sensor fixing device shown in Figure 2 is assembled;
Fig. 5 is the detailed view of ultrasonic sensor assembly assembling of the present invention;
Fig. 6 represents the detailed view of eddy current assemblies assembling of the present invention;
Fig. 7 is a motion control mechanism skeleton diagram of the present invention; And,
Fig. 8 is the data capture and the control schematic representation of detection system sensor of the present invention.
Now in detail with reference to these schematic representation.Retaining ring detection system 10 of the present invention is represented in Fig. 1 and Fig. 2.Detection system 10 is made up of ultrasonic detecting unit 13 and eddy current testing unit 16, and they are handled by computer control station 19.These devices are handled retaining ring scanner component 22 a long way off, and the latter is controllably joined to last retaining ring 25 with generator amature.Rotor both can be contained in the generator, also can extract (not shown) out from generator.The retaining ring scanner is by first balladeur train or be circumferential balladeur train 31 and the 2nd balladeur train or make straight line balladeur train 34 form.Circumferentially balladeur train 31 is by sprocket wheel and chain actuator 37 and along rotor 28 rotations.The straight line balladeur train is installed on the circumferential balladeur train by two " U " type guide groove siding tracks 40, and can rectilinear direction move with respect to circumferential balladeur train.The dragging system of these balladeur trains will go through below this paper.
Retaining ring scanner 22 can move along the whole circumference of retaining ring 25 by the effect of circumferential dragging system 37.Circumferentially dragging chain 43 can be along 25 location, retaining ring district of rotor 28.Chain 43 passes scanner by the groove on the domed support 46.This just allows straight line balladeur train 34 to move to that from this head of retaining ring unobstructedly, as long as scanner is installed once, just can check whole retaining ring.Drag sprocket wheel 49 and chain 43 engagements, and dragged by circumferential drawing motor 52.A circumferential position feedback transducer 55 provides information to control station 19, and this also will more detailed below description.Above scanner 22 is installed in retaining ring 25 and when making chain be positioned at correct position along rotor axial, use a manual banded spacer instrument (not shown).Axial alignment is provided by nylon guide wheel front-wheel 58 and trailing wheel 61.These guide wheels maintain scanner on the fixedly axial position that is equivalent to " O " point on the retaining ring, and this point is called the nose of retaining ring usually.Because radially the fit up gap is very little, front jocket wheel 58 is contained on the swing arm 64.After scanner was fixed on suitable axial position, this swing arm was locked in the retaining ring nose downwards.Subsequently, back guide wheel 61 is positioned and tightens up this scanner and U. S. Patent 4,970, No. 890, the sort of similar described in by name " electric generator detection system ", that patent is granted the present claimant's of the present invention just, therefore, inject reference here.
The straight line balladeur train of representing comparatively in detail in Fig. 3 34 rides on 8 preload ball bearings 67, and the latter is rolling on two " U " shape guide groove siding tracks 40 about circumferential balladeur train 31.Cantilever spring 70 usefulness bolted on connection straight line balladeur trains 34, the pre-loaded bearing that presses of spring is so that eliminate circular runout.Pre-loadedly make that scanning is highly stable under the various speed that balladeur train moves, vibration, straight line balladeur train 34 be not by means of direct current drawing motor 73, sprocket wheel 76 and cable formula prestressing force drag chain 79 and are dragged by front and back along the retaining ring center line.Chain pressing plate 82 is linked to balladeur train 34 on the chain 79.Also provide a linear feedback sensor 85.
Fig. 4 represents to be used for installing the eddy current on the straight line balladeur train 34 and the probe holder assembling 88 of ultrasonic sensor.Ultrasonic (UT) sensor 91 and vortex sensor (E/C) are predefined for elastic compression retaining ring 25 lightly, and this makes sensor can slip over the irregular place of any retaining ring, for example paints bubble and ring body profile transition position etc.Because it is limited that the rotor that is in the working position is done nondestructive inspection (NCE) space, the universal and elasticity assembling of sensor bracket is finished with ad hoc approach.For some retaining ring design, have only 3.81 centimetres (1.5 inches) from the radial clearance that gap-gas segregating ring ring (not shown) is measured to retaining ring nose external diameter.Because the space of energy usefulness is limited, omnidirectional mechanism must accomplish that radial height is low as far as possible, and this just requires this mechanism to circumferencial direction and axial direction expansion.The present invention is used for carrying out an important feature of the device of eddy current and ultrasonic semi-automatic scanning, and is relevant with the self-correcting characteristic of sensor universal joint and elasticity probe clip just.
Fig. 5 represents a typical UT wedge-shaped blocks 47.This wedge is located by hand and is pressed into interior bracket plate 100 by the finger-type nut of tightening on the UT folder 106 103.Interior bracket plate 100 is movable, can be slightly along the plate axis rotation with respect to UT pressing plate carriage 109.Equally, UT pressing plate carriage abuts against on the pin 112 of x-y direction band flexibility, and this pin is the unique point of contact point with sensor " U " type carriage 115.These two orthogonal universal nodes make the hydraulic pressure couplant remove to proofread and correct ultrasonic sensor wedge-shaped blocks 97, and maintenance is tangent with the Line of contact on the retaining ring 25.This sensor " U " type carriage 115 is parts of the removable probe holder 88 of straight line balladeur train 34.It should be noted that the UT pressing plate carriage 109 here can take off at an easy rate from equipment, as long as lift sensor " U " type carriage 115, so that taken off probe holder 88 just from the straight line balladeur train.Compliant pin 112 on the x-y direction just is fixed on the UT pressing plate carriage 109.These characteristics just can be changed ultrasonic parts rapidly, and this is to the comprehensive NDE(nondestructive inspection of retaining ring) needed a lot of different scannings are necessary.Equally, the ultrasonic sensor chock tends to be manufactured by plexiglass, should always keep contacting with the direct of retaining ring surface, so that best ultrasonic coupling to retaining ring is provided.The realization of optimum coupling, what lean on is the design of ultrasonic sensor wedge-shaped member 97.Supporting with gimbal design is important for keeping sensor chock and retaining ring Line of contact tangent equally.
Tend to nonhygroscopic ultrasonic coupling media, for example burnt Chinese parasol tree phenol (pyrogel) directly pumps in each threaded hole 118 of wedge-shaped blocks 97, and the wide diffusion groove 121 of these holes and two 0.15 centimetre (0.06 English inch) links.Tend to adopt nonhygroscopic medium to be because the stress corrosion cracking (SCC) that may exist in the retaining ring is developed by the existence of humidity.Medium is stressed from all directions of these grooves 121, comprises from the bottom of ultrasonic sensor 91.Experiment shows, in the moving direction on retaining ring surface how it no matter the UT wedge-shaped blocks of this structure produces extraordinary acoustical coupling.
Eddy current probe fixed component 124 shape of bullet is also arranged is close to retaining ring 25 by means of transmission pole 127 and 4 stage clips 130 that 4 bolts shown in Figure 6 advance sensor " U " type carriage 115.The contact surface of eddy current parts 124 is matched with the profile with retaining ring by machining.For fear of the retaining ring scratch, these eddy current parts are manufactured by non-adhesive material, tend to use immersion oil nylon.Sensor " U " type carriage 115 can freely rotate around a left side 133 and right 136 two yawing axis with respect to removable " U " type carriage 116 shown in Figure 3.In addition, lifting of eddy current probe must be reduced as far as possible.The very approaching surface of contact with retaining ring in the position of deflection pivotal line, so that stable as far as possible, this just allows 124 deflections of eddy current parts, thereby can closely follow different retaining ring profiles, for example nasal region.Each self-deflection and the tracking independently of eddy current parts 124 and interior bracket plate 100, this is the most basic for carrying out eddy current and ultrasonic scanning concurrently.Experiment shows that the ultrasonic medium of burnt Chinese parasol tree phenol extracts not influence for eddy current, and eddy current parts 124 are for the also not influence of medium coupling of burnt Chinese parasol tree phenol.And the plenty of time has been saved in line scanning.Use two independently eddy current probe the sweep length of 0.508 centimetre (0.2 English inch) can be provided, sweep length can be increased to any desirable numerical value and increase additional eddy current probe.
The groove (not shown) is advanced in 116 rivetings of removable " U " type carriage, and this groove forms in being machined in pivot arm assembling 139.This pivot arm is with respect to positive and negative 15 degree (+/-15 ℃) of straight line balladeur train 34 deflection freely.Pivot arm 139 is by means of two tension springs 142 shown in Figure 3 and flexiblely near retaining ring.Hawser 145 connects each spring, wears and takes up power pulley 148, is parallel to the tight power anchor point 148 that is one with straight line balladeur train 34.Set up the prestressing force of spring 142 with the method for adjusting cable length, this has controlled the pressure of the ultrasonic and vortex sensor that is applied to the retaining ring surface again.
Retaining ring 25 has paint bubble and other surface imperfection places once in a while, and these must be removed, so that best ultrasonic signal coupling and MIN probe distance is provided.For accomplishing this point, need sometimes the retaining ring external diameter to be polished with air sander shown in Figure 2 151.By the way of replacing sensor " U " type carriage 115, emery wheel is received on the straight line balladeur train 34 with a carriage special, fixedly air sander 151.A very simple vacuum tube is received on the wheel guard, to collect fragment.For the surface after the visual inspection cleaning, 6 millimeters type optical fiber video head (not shown) that use Weir He Ailin to produce prove very effective.
Fig. 7 represents the skeleton diagram that the mobile control division of retaining ring detection system 10 divides.Two used mobile coordinates of this system are housed on the scanner.Circumferentially retaining ring scanner 22 is circumferentially mobile around retaining ring 25 in tow for drawing motor 52, and straight line balladeur train drawing motor 73 drive straight line balladeur trains 34 are axially crossed retaining ring.Circumferentially drawing motor 52 has an electric braking device 154 that links with it, and it has two functions: the one, and when cutting off the power supply, motor avoids the motor slippage, and another is under the state of emergency motor to be stopped operating.
Two coordinates all have the position transducer (155,185) that is installed on the retaining ring scanner 22, so that provide position information to the mobile control unit 157 of computer control station 19.Circumferential position feedback transducer 55 with on the retaining ring 25 fixedly retaining ring scanner 22 used belts locate, and linear position feedback transducer 85 is located with the moving of belt that drags straight line balladeur train 34.Each sensor all produces two series impulses, differ 90 degree electrical angles each other, and its frequency and travelling speed is proportional.The phase place of pulse sequence tells mobile control unit 157 different coordinates just along which direction move, and the number of pulse and pulse frequency are passed on the information of position, speed and acceleration.
Side limit switch 163 matched after the straight line balladeur train also had a preceding side limit switch 160 and one.These limit switches are carried signal to motor port assembly 166, and to prevent straight line balladeur train drawing motor 73 that straight line balladeur train 34 La Detai are far away, this has just been avoided the damage dragging system.Circumferential drawing motor voltage probe 169 detecting voltages, and circumferentially drawing motor current probe 172 is measured the electric current relevant with circumferential drawing motor 52.Equally, straight line drawing motor voltage probe 175 detecting voltages, and straight line drawing current probe 178 is measured the electric current relevant with straight line balladeur train drawing motor 73.
Each coordinate all has two kinds of patterns to control it to move.The one, to control by mobile control unit 157, this is the assembly of a kind of microprocessor for the basis, it uses sensor information to remove to control motor and appropriate control signals is delivered to motor port assembly 166.Another one is a manual mode, and it utilizes manual mobile control unit 181 a long way off to handle.Automatic/hand switch 184 indication motor port assemblies 166, which kind of pattern is at operated motor.The signal of carrying out control is sent to circumferential drawing motor amplifier 187 and straight line drawing motor amplifier 190, and these amplifier power supplies are with starting motor.
Fig. 8 represents the skeleton diagram of the data capture and the control of native system sensor.Ultrasonic sensor (group) 91 and vortex sensor (group) 94 are arranged in the straight line balladeur train 34.Medium also flows through the opening on the ultrasonic sensor assembly 97 that links with ultrasonic sensor (group) 91, thereby suitable acoustic energy is transferred in the detected retaining ring 25.MEDIA FLOW can be regulated by medium distribution system 193, and it can be switched on or switched off by digitizing I/O assembly 199 with medium on/off switch 196 or computer 19.
Ultrasonic sensor (group) 91 is delivered to ultrasound detection instrument 13 with its signal by low noise concentric cable 202, and the latter has three types output.Wherein, provide two kinds of simulation outputs, one of them represents the ultrasonic waveform of reflected back, and another is the peak value of the reflection supersonic wave in a time window.This signal simulated a digital assembly 205 samplings.Other class output is by digital data channel 208, and it can make digital I/O assembly 199 carry out communication with ultrasound detection instrument 13.
Vortex sensor group 94 on the straight line balladeur train 34 is used for surveying the undesired place of retaining ring 25 outer surfaces.Their signal offers eddy detecting instrument 16.Eddy detecting instrument 16 has two kinds of simulation outputs, and each sensor 94 all has 211 and Y position outputs 214 of an x position output; These signals simulated a digital assembly 205 and read.Comprehensive x and y position output signal just can show the characteristic of surface imperfection point.
The operation of above-mentioned instrument and electronics can be finished by any suitable computer software.Computer software function situation to the suggested design particularly suitable is provided below, and therefrom personnel that are proficient in the knowledge of can compile out corresponding computer programs rapidly.System 10 in general can be with ten kinds of mode operations: i.e. originate mode, " involution " pattern, time flowing water table schema, calibration mode, jog mode, automatic mode, scan pattern, reprocessing pattern, diagnostic mode and utility mode.This program comprises a fine mode, i.e. holotype, and the operations staff can select in ten system models one as execution pattern.After system's starting, computer 19 shows a main menu, allows the operator select one of ten kinds of system running patterns.
When entering originate mode, computer 19 provides a data input form on CRT223.The chance of importing following messages by keyboard 226 is provided to the operator:
1, power plant's title
2, power plant position
3, operator's name
4, power plant's telephone number
5, task sequence numbering
6, steam turbine generator group #
7, retaining ring drawing number
8, shelling ring material Schedule
9, generator amature one end that need detect
10, additional remarks and information
In addition, computer 19 reads the drawing file of project (7) appointment, enters its random access memory (RAM) from magnetic store 229.Drawing file contains the decisive size with which kind of detected retaining ring.In these sizes two, promptly retaining ring external diameter and retaining ring length will be used usually, and be presented on the CRT223 to the operator.The 3rd size, retaining ring nose length be also shown on the CRT223, and it may be somewhat different with the design nose length of reading in drawing file.The actual retaining ring nose length of specific generator rotor is measured at the scene, power station, thereby the input of its numerical value may the person of being operated change.If retaining ring drawing or these sizes are unusable, are presented to people such as Metala and authorize this application under one's name the 5th, 029, No. 476 disclosed equipment of U. S. Patent of asking someone and to use and its size is input into RAM.So here also with reference to the 5th, 029, No. 476 patents.
As the part of originate mode, an operator might directly not write down the sound of detected retaining ring 25 is cut ripple (carrier wave forward position) velocity of wave.This can finish by means of the ultrasonic pulse reflection instrument that can buy on market, and also handy simultaneously energy produces the ultrasonic sensor 91 that the zero degree vertical with detection faces cut wavefront.The echo filter device part of detecting instrument 13 will be set with the ultrasonic sensor resonant frequency and match, and this frequency is identical with the nominal resonant frequency that retaining ring detects used ultrasonic sensor (group).The operator is placed in ultrasonic sensor with checked retaining ring position and contacts, and (retaining ring be with the parallel axes of generator amature 28) also is in a known axial position of retaining ring radial thickness.The operator writes down the radial thickness that ultrasound passes retaining ring subsequently, from retaining ring aperture surface reflection and get back to the 13 needed times of ultrasound detection instrument.These data t is transfused in the originate mode data entry form.Computer 19 usefulness following relationship formulas are calculated the measured wave velocity of cutting:
Vs＝2X/t×10
6
Here
Cut wave sound speed (cel) in the Vs=retaining ring
The ring that X=obtains from drawing thick (English inch)
T=cuts crest to the retaining ring internal diameter and return the required time of ultrasound detection instrument 13 in microsecond.
Computer 19 shows the acoustic velocity calculated and its value is stored among the RAM so that use later on CRT223.If the operator withdraws from from originate mode, computer 19 just deposits the information in the data entry form in RAM and magnetic store 229.
When entering " involution " pattern, computer 19 shows an operator interface table on CRT223." involution " pattern is to be used for defining zero-bit into the circumferential seat parameter and the axial seat parameter of retaining ring scanner 22.The operator can make the axial coordinate original position that resets by straight line balladeur train 34 being moved to retaining ring 25 noses.Use manual mobile control unit 181 can carry out this and move, side limit switch 160 before running into, and move and just stop.Since decision before running into during side limit switch 160 the straight line balladeur train be parked in positional error where actually, just need survey straight line balladeur train 34 more accurately with respect to retaining ring scanner 22 positions in front with a displacement transducer 220.The operator signals for computer 19 by keyboard 226: the straight line balladeur train has arrived the involution position.
Be the circumferential coordinate of involution, the operator moves on to the twelve-hour place with retaining ring scanner 22.The output of simulation quadrant 217 simulated a digital assembly 205 samplings, and is transported to computer 19, on CRT223, show, thus the position of pointing out twelve-hour for the operator.Just in this point, the operator signals to computer 19 by keyboard: retaining ring is retouched device 22 and has been arrived circumferential involution position.
Next step is to set up a calibration coefficient for circumferential position feedback transducer 55.Because retaining ring diameter and length are various, all must do at first like this each retaining ring 25.From zero-bit, the operator moves 360 ° with retaining ring scanner 22 around retaining ring and arrives same starting point until it.In this point, the operator gives computer 19 signals by keyboard 226: retaining ring scanner 22 has moved 360 °.According to involution position feedback and 360 ° of position feedback, computer 19 will calculate the suitable calibration coefficient of circumferential position feedback transducer 55.
Time flowing water table schema is used for setting up a retaining ring detected parameters table originate mode from retaining ring figure paper size and the acoustic velocity measutement value noted.Computer 19 decisions are to the detected parameters of detected retaining ring optimum.Detected parameters comprises sensing station, sensor chock angle and accurate ultrasound traveling time, and these all are to check that any position of retaining ring aperture surface is necessary.Computer 19 is stored in the detected parameters table among the RAM, so that arbitrarily use in scan pattern.The operator can be printed this form with duplicating output unit 232 when needed.
When entering scan pattern, computer 19 shows an initial submenu of scanning on CRT223.The operator can select a desirable retaining ring position to check from this menu.From scanning the selection of initial submenu, computer 19 shows a scanning original data record table on CRT223 according to the operator, and this is that the inspection of carrying out is needed.The selected inspection optimum scanning parameter that produces in time flowing water table schema is accessed from RAM.Computer 19 shows these parameters on CRT223.The operator can edit these parameters.The operator also can replenish this basic ultrasonic testing, does the detection of retaining ring aperture surface by ultrasonic testing, is done the detection of the outer diametric plane of retaining ring simultaneously by eddy current inspection, perhaps uses additional probes 235 to do other inspections.When scanning primary data record chart was finished, the operator can begin to carry out the automation inspection by keyboard 226 notice computers 19.If computer 19 is received the signal of starting automatic inspection, following column scan layout and mobile process will be performed:
1, computer 19 is transported to the ultrasound detection instrument arrangement information that will be used for carrying out inspection in the ultrasound detection instrument 13, unless the operator abolishes this optional project in the initial subpattern of scanning.
2, computer 19 is gathered arrangement information to scan-data according to the RAM data that produce in the initial subpattern of scanning and is flowed to simulation one digital assembly 205, checks so that carry out.
3, from the RAM data that the initial subpattern of computer 19 scanning produces, access the mobile Control Parameter useful to positioning ring retaining ring scanner 22, check to carry out.These data are also carried mobile control unit 157.
4, computer 19 signals to mobile control unit 157, the needed specific mobile order of the inspection that deactivation will be carried out.
5, ultrasound detection instrument 13 provides one to return the sound wave analogue signal from ultrasonic sensor (group) 91 to simulation one digital assembly 205.
6, eddy detecting instrument 16 provides a reaction analogue signal that passes to simulation one digital assembly 205 from vortex sensor 94.
7, computer 19 periodically with mobile control unit 157 communications when to determine that retaining ring scanner 22 has arrived next position of moving in the order, should signal to simulation one digital assembly 205, remove one or more signals that simulation one digital assembly 205 provides in acquisition step (5) and (6).Next should be in moving order to the position that simulation one digital assembly 205 signals, the retaining ring external diameter that can from be stored in RAM, obtain at originate mode and rule of thumb set up this inspection is had the criterion of enough retaining ring coverage rates and determines.
8, computer signals to simulation one digital assembly 205, and a sample and a corresponding analog signal figureization that provides in step (5) and (6) are provided.
9, according to the inspection situation that is performed, simulate a digital assembly 205 and can send the digitalized data that in step (8), produces among the RAM to, use in order to computer 19.
10, the digitalized data of one of following two approach of computer 19 usefulness obtaining steps (8) generation, depend on the inspection that is performed:
A) the public data passage of sharing by computer 19 and simulation one digital assembly 205 is delivered to computer 19 with data from simulating a digital assembly 205.
B) data are delivered to RAM from simulating a digital assembly 205.Computer 19 accesses these data from RAM used for it.
11, computer 19 shows the inspection situation of just carrying out on CRT223.The display items display that defaults has the classification that approaches expression in real time of being fetched data in step (7) and (10) to show.In addition, computer 19 display operation person's input signal on CRT223 also.
12, computer 19 periodically with mobile control unit 157 communications, send the data that step (10) is obtained in the mobile order of disk 229 next position to determine retaining ring scanner 22 when to reach to be suitable for, to do permanent storage.
13, computer 19 periodically is all kinds of system closedown input checking numeral I/O assembly 199.
14, step (1) may or needn't repeat to step (13), and this depends on the inspection that is performed.Scanning sequency continues, and occurs up to one of following.
A) computer 19 is received off signal in step (13), which moment operator to have handled the control of native system.
B) computer 19 has been fulfiled requirement scanning time by the initial subpattern regulation of scanning, which moment operator to have handled the control of native system.
C) computer 19 receives that the operator passes through the input of keyboard 226, requires to postpone scanning sequency.The operator can temporarily postpone the scanning sequency of just carrying out, and at which constantly, it still is possible that retaining ring scanner 22 is controlled by manually moving of manual mobile control unit 181.In addition, computer 19 reads the current position of the retaining ring scanner 22 in the mobile control unit 157, and these data are deposited in RAM.Computer 19 monitors the position of retaining ring scanner 22 from mobile control unit 157, and information is presented on the CRT223.The operator can signal to computer 19 by keyboard 226, restarting present inspection, at that constantly, the manual mobile control unit 181 of computer 19 cancellations is also delivered to mobile control unit 157 to suitable mobile Control Parameter, with the inspection in the process of restarting, and comprise the last position of the retaining ring scanner 22 that is stored among the RAM.The operator also can promptly stop present inspection, that constantly computer 19 operator is given in control, and the initial submenu of reading scan.In this point, the operator can select a new inspection by keyboard 226, perhaps returns main menu.
When entering calibration mode, computer 19 shows that on CRT223 is demarcated a submenu.Computer read operation person is by the selection of keyboard 226 from demarcate submenu.Demarcate submenu and provide various demarcation projects to the operator; Wherein two of these projects, by computer 19 video data record chart on CRT223, it is fixed to make the operator import putting of various detecting instruments, as ultrasound detection instrument 13 and eddy detecting instrument 16.The 3rd project can make the operator remove to demarcate vortex sensor (group) 94., " U " type carriage 116 is taken off from retaining ring scanner 22 for this reason, and connect " U " type carriage demarcation ABAP Adapter 238.Be to carry out calibration experiment, will " U " type carriage demarcate ABAP Adapter 238 and move past demarcation reflector 241 on eddy current demarcation standard 244.In this moving process, demarcate adapter position sensor 247 and provide position information, read in sampling ratio used in the retaining ring 25 actual scanning processes x-and y-position output 211 and 314 identical, that produce by eddy detecting instrument 16 and simulate a digital assembly 205 to mobile control unit 157.
Eddy current is demarcated standard 244 and is contained the artificial and/or natural reflector 241 that has known dimensions, and this reflector is used with the same material of retaining ring 25 and made.The data that get from demarcation scanning are deposited in disk 229 by computer 19.To do contrast with the data of collection on the retaining ring 25 after these data.
When entering automatic mode, computer 19 shows various operator's selectable items and status item on CRT223.Status item comprises the current position of two coordinate axis.Automatic mode can make retaining ring scanner 22 move to axial and/or circumferential position specific on the retaining ring 25.The operator can be each desirable position of coordinate axis input and travelling speed by keyboard 226, thereby notice computer 19 beginning retaining ring scanners 22 is mobile.
When entering jog mode, computer 19 shows various operator's selectable items and status item on CRT223.Status item comprises the current position of two coordinate axis.Jog mode can make the operator by using the manually slight mobile retaining ring scanner 22 of manual mobile control unit 181.By using the arrow key on the keyboard 226, the travelling speed that circumferential and axial drag all can change.Preceding side limit switch 160 and back side limit switch 163 will stop straight line balladeur train 34, to prevent running too far at axial direction.When a quilt in the limit switch was run into, computer 19 showed a state signal on CPT223.When the emergency braking knob 250 on the manual mobile control unit 181 was depressed, computer 19 was ended moving of two coordinate axis, and started the electric braking device 154 of circumferential drawing motor.Computer 19 shows the state signal of a urgent stop conditions on CRT223.
When entering the reprocessing pattern, the optional reprocessing submenu of computer 19 display operation person on CRT223.According to the operator by keyboard 226 from the reprocessing submenu to the selection of total score segment file subpattern, computer 19 is the video data record chart on CRT223, so that put the scan data file of fixed and comprehensive segmentation.The fractional scanning data file is to include less than the retaining ring of 360 degree to check the circumferential quadrant data file of data.The subpattern of total score segment file is a kind of means, is used for comprehensive fan-shaped section data, is the scanning documents that specific inspection forms 360 complete degree.As long as the operator is fractional scanning of definition in the initial subpattern of scanning, the fractional scanning data file just produces in the scan pattern process automatically.Can not carry out under the 360 complete degree retaining ring scanning situations, perhaps under the situation not enough by the space of retaining ring, for the localization examination of generator guard ring, fractional scanning must be specified specially.The operator has an opportunity by keyboard 226 input following messages.
1, the direction of sectoring rotation beginning
2, the period of each sampled point that shows with kilsyth basalt, gather the analog scanning data between at this moment.
3, the filename of fan-shaped file that can be comprehensive
4, the fan-shaped section size of showing with kilsyth basalt of each filename of input in (3).
The operator can show the filename Schedule that is stored in the suitable file in the disk 229 by keyboard 226 notice computers 19 on CRT223.Computer 19 calculates the circumferential scanning length of each file of appointment in step (3), use be the following relationship formula:
S＝q×p
The circumferential scanning length of the file of S=sampling here
In the file of q=step (3) input in the fan-shaped section size of tolerance.
The sampling interval of showing with kilsyth basalt between each sampled point of p=step (2) input.
Operator's input item (3) and (4) afterwards, computer 19 is the circumferential scanning length of each filename of demonstration on CRT223 just.The operator can be by keyboard 226 notice computers 19, the scan data file that begins comprehensive segmentation.Receive after this notice that computer 19 is confirmed the data file of step (3) input earlier.If the number of scanning lines of the length S of each filename that success, computer are just imported with suitable order compilation step (3), producing a scanning document, its sweep length equals the S value sum that calculates from each fractional scanning data file.Computer 19 is stored in disk 229 with comprehensive scanning document.
When the operator selected the Integrated Checkout subpattern by keyboard 226 from the reprocessing submenu, computer 19 showed a data record chart on CRT223, spent scanning document so that put fixed and comprehensively be stored in 360 on the disk 229.The 360 degree scanning documents that different inspections can be obtained integrate, to produce an output file, its data represented whole retaining ring aperture surface and outer diametric plane.The operator can import following messages by keyboard 226:
1, output file type
2, circumferentially zero migration
3, axially zero migration
4, the scan-data sampling interval of showing with kilsyth basalt
5, need comprehensive file
6, carry out the angle of refraction beam of sound used in the retaining ring testing process, whether can use the output file type of appointment in the step (1).
Adopt relation given in the narration of total score segment file subpattern when the sweep length of scanning documents is spent in computer 19 calculating 360, and on CRT223, show this numerical value, make the operator continue step (4).In addition, with the way of the number of each file data of decision sampling, existing scanning times in each file of computer 19 calculation procedures (5) input, and with this number divided by the sweep length that calculates.After step (5) was imported each filename, computer 19 just showed the scanning times of each file on CRT223.The operator can tell computer 19 by keyboard 226, removes to show the corresponding document name Schedule of confession step (3) usefulness that is stored on the disk 229.The operator also can tell computer 19 by keyboard 226, removes to begin the specified file of comprehensive step (5), so as to produce a step (1) the output file of specific which kind of type.According to the instruction of receiving, the filename that computer 19 is transfused to affirmation, and will advance a file with suitable order synthesis from the number of scanning lines of each effective document.Computer 19 also will be adjusted scan-data, make it to be fit to following situation:
A), lose to producing the specific the sort of complete needed scanning document of output file of step (1)
B) according to the skew of step (2) and (3) input, the refraction beam of sound angle (if available) of step (6) input and if the sensor on the retaining ring scanner 22 91 and/or 94(available) the mechanical bias constant, carry out the scanning document data with respect to tested retaining ring benchmark zero-bit and proofread and correct.
When the operator selected the drawing subpattern by keyboard 226 from the reprocessing submenu, computer 19 showed a data record chart on CRT223, was used for putting calmly and is plotted in the comprehensive inspection file that produces in the Integrated Checkout subpattern.The available test data that is input into RAM in 19 pairs of originate modes of computer is retrieved and these information is shown on CRT223.On behalf of the filename of certain comprehensive inspection file, the operator also can go to draw by keyboard 226 one of input.The operator can also be by keyboard 226 Edit Text data and other diagram parameters.According to the command adapted thereto of receiving from keyboard 226, computer 19 reads drawn data file from disk 229, and shows the color graphic of these data on CRT223.Computer 19 to the necessary degree of drawing data in an acceptable border, tends to the data reduction of reading to paint on the specification paper of one 8 1/2 * 11 English inch from file.The compression of data is to realize that by the way of drawing the maximum data sample amplitude for each x data sample the x here is a scaling factor that gets according to data file size.In addition, computer 19 go back contained in the video data file axially, circumferentially and the appropriate scale of amplitude information.Computer 19 also is that special File shows corresponding text information.According to the suitable instruction of receiving from keyboard 226, computer 19 is sent to hard-copy output device 232 to the image that shows on CRT223.
When entering diagnostic mode, computer 19 shows a diagnosis submenu on CRT223.From this menu, the operator can select various projects, makes computer 19 remove the executive system diagnostic test according to these selections, and experimental result is shown on CRT223.
When entering utility mode, computer 19 shows a practical submenu on CRT223.From this menu, the operator can select the project of various kinds, and these projects relate to the file management of computer 19, and the format form of magnetic Jie storage is put and fixed time and the date, and is other general utility functions to computer operating system software.
Attached: the identification that the reference of adopting in the accompanying drawing is digital
The digital figure number of description references
Motor amplifier 187 7
Numeral I/O assembly 199 8
Analog to digital assembly 205 8
Claims (10)
1, a kind of system that is used for detecting the generator amature retaining ring, this retaining ring has an outer diametric plane and an aperture surface, being characterized as of this detection system:
Be used for checking simultaneously the probe mechanism of crackle in diametric plane, aperture surface and the cylindrical object body outside;
Be used for above-mentioned probe mechanism is configured to cylindrical sweep mechanism, wherein said sweep mechanism can along cylindrical circumferentially and the axially locating of length direction;
With the position monitoring mechanism that decides above-mentioned scanner mechanism position on cylindrical body; And
Control the mechanism of this detection system operation from afar.
2, the detection system in the claim 1, wherein the further feature of said probe mechanism is: have an eddy current probes that is used for surveying external diameter facial cleft line and one to be used for surveying the originally ultrasonic sensor of crackle on one's body of aperture surface and cylindrical body.
3, the detection system in the claim 1 or 2, the feature of wherein said scanner mechanism is: one first balladeur train is arranged, the mechanism that this balladeur train has a major axis and this first balladeur train is rotated in a circumferential direction around cylindrical body; Also have second balladeur train that is installed on first balladeur train, it includes and is used for second balladeur train along mechanism that the major axis of first balladeur train is carried.
4, the detection system in the claim 3, the mechanism characteristics of wherein said rotation first balladeur train is: one drags chain, can be along cylindrical circumferentially fixing; A circumferential dragging system that couples with first balladeur train, this circumferential dragging system further comprises first drawing motor that is fixed to first balladeur train, first drawing motor has a sprocket wheel attached to it, this sprocket wheel with drag chain and mesh like this, make that this first balladeur train just rotates in a circumferential direction around cylindrical body when first drawing motor moves.
5, the detection system in the claim 3, the feature of first balladeur train wherein is: a pair of is the groove of " U " shape basically, the major axis of balladeur train cooperates and by this major axis alignment therewith, and the above-mentioned mechanism that is used for carrying second balladeur train includes a carriage with above-mentioned " U " connected in star sliding fit; One drags chain along the straight line of the long axis of first balladeur train basically; A chain pressing plate, its some is fixed to straight line and drags chain, its another partly be fixed on second balladeur train; And be used for dragging the mechanism that straight line drags chain along the major axis of first balladeur train, thereby second balladeur train just is transferred along the major axis of first balladeur train.
6, the detection system in the claim 5, the feature of second balladeur train wherein is: the mechanism of above-mentioned probe machinery is installed thereon, and said mounting mechanism comprises:
The pivot arm assembling that links with second balladeur train, make it can along with the perpendicular axis tilt of the major axis of first balladeur train, and make above-mentioned probe mechanism be suitable for contacting above-mentioned cylindrical surface;
One first carriage removably is connected to the pivot arm fit on;
A probe holder assembling that is fit to be contained on first carriage, this probe holder assembling can make dress probe mechanism thereon near above-mentioned cylindrical body with respect to the first carriage deflection.
7, the detection system in the claim 6, probe mechanism wherein comprise an eddy current probes that is used for surveying external diameter facial cleft line, and a ultrasonic sensor that is used for surveying aperture surface and the crackle of cylindrical body own.
8, the detection system as describing in the claim 1 to 7 is characterized in that:
One can along the cylindrical body circumference fixing drag chain;
A circumferential dragging system that is coupled with first balladeur train, this circumferential dragging system further comprises first drawing motor that is fixed to first balladeur train, this first drawing motor have one with its sprocket wheel that suitably connects and with drag chain and mesh rightly, make that when first drawing motor moves this first balladeur train is just around cylindrical circumference rotation;
A pair of is the groove of " U " shape basically, is distributed in the both sides of first balladeur train, and with the major axis of first balladeur train to directly;
Second balladeur train has a carriage that is suitable for above-mentioned " U " connected in star sliding fit;
One drags chain along the straight line of the long axis of first balladeur train basically;
A chain pressing plate, its some is fixed to straight line and drags on the chain, and another partly is fixed on second balladeur train;
One is used for dragging second drawing motor that straight line drags chain along the long axis direction of first balladeur train, thereby second balladeur train is carried along the long axis direction of first balladeur train; And
With the above-mentioned position sensing mechanism that decides above-mentioned sweep mechanism position on cylindrical body, it comprises a circumferential position feedback transducer that suitably links to each other with circumferential dragging system and a linear position feedback transducer that links with the straight line drawing motor, by them, from circumferentially and the signal of linear position feedback transducer be added in above-mentioned control mechanism, with the position of first and second balladeur trains that determine above-mentioned scanner mechanism.
9, the detection system in the claim 8, the feature of probe holder assembling wherein is: the U-shaped carriage removably is connected on first carriage, and this U-shaped carriage can be with respect to the first carriage deflection on the axis vertical with the first balladeur train major axis; First mounting blocks that is fit to hold eddy current probes, this first mounting blocks is received the U-shaped carriage by pressure spring; Second mounting blocks that is fixed to the U-shaped carriage can vertical deflection for the U-shaped carriage, and this second mounting blocks is suitable for holding ultrasonic sensor.
10, the detection system in the claim 9, its further feature is: be used for mechanism that medium is assigned to cylindrical body and uses with ultrasonic sensor, wherein, second mounting blocks comprises first mechanism that is used for receiving from the next medium of a medium supply source, and one is used for medium is assigned to cylindrical second mechanism.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US82673192A | 1992-01-28 | 1992-01-28 | |
| US07/826,731 | 1992-01-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1074973A true CN1074973A (en) | 1993-08-04 |
Family
ID=25247384
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92105760A Pending CN1074973A (en) | 1992-01-28 | 1992-07-16 | The remote eddy current and the supersonic detection device that are used for turbine generator guard ring |
Country Status (9)
| Country | Link |
|---|---|
| KR (1) | KR930017268A (en) |
| CN (1) | CN1074973A (en) |
| BE (1) | BE1005916A5 (en) |
| ES (1) | ES2047453B1 (en) |
| GB (1) | GB2263777A (en) |
| IL (1) | IL102323A0 (en) |
| MX (1) | MX9204023A (en) |
| PL (1) | PL295276A1 (en) |
| TW (1) | TW241410B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1967207B (en) * | 2005-10-20 | 2011-07-06 | 通用电气公司 | Phased array ultrasonic methods and systems for generator rotor teeth inspection |
| CN105965544A (en) * | 2016-05-27 | 2016-09-28 | 珠海上富电技股份有限公司 | Robot remote ultrasonic induction automatic testing system and control method thereof |
| CN107070121A (en) * | 2017-03-14 | 2017-08-18 | 温州博诚汽车机电有限公司 | A kind of idle motors rotor assembly equipment |
| CN107907596A (en) * | 2017-11-17 | 2018-04-13 | 大连交通大学 | Ultrasonic rotating scan imaging apparatus and method |
| CN108802182A (en) * | 2018-06-14 | 2018-11-13 | 国网宁夏电力有限公司电力科学研究院 | The generator guard ring detection method of inner surface wave is encouraged based on graze |
| CN109458232A (en) * | 2018-10-16 | 2019-03-12 | 中广核核电运营有限公司 | A method of measurement cylinder partition low-lying area nest and its leaf top resistance vapour piece are concentric |
| CN111845993A (en) * | 2020-08-21 | 2020-10-30 | 无锡中车时代智能装备有限公司 | Rotor crawling type generator bore detection robot device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6220099B1 (en) | 1998-02-17 | 2001-04-24 | Ce Nuclear Power Llc | Apparatus and method for performing non-destructive inspections of large area aircraft structures |
| US6100711A (en) * | 1998-03-24 | 2000-08-08 | General Electric Co. | Miniature air gap inspection device |
| US7265662B2 (en) | 2005-03-17 | 2007-09-04 | Praxair Technology, Inc. | Apparatus and method for inspecting containers |
| CA2554906C (en) | 2006-05-10 | 2008-09-02 | Robert Allan Simmons | Method and apparatus for conveying an ultrasonic sensor about an outer peripheral surface of a tube |
| US9488618B2 (en) * | 2013-11-05 | 2016-11-08 | Siemens Energy, Inc. | Generator retaining ring and other component thermal degradation evaluation by eddy current non-destructive examination |
| JP6833670B2 (en) | 2017-12-27 | 2021-02-24 | 株式会社東芝 | Inspection system and inspection method |
| CN107941905B (en) * | 2018-01-11 | 2023-10-13 | 中国大唐集团科学技术研究院有限公司华中分公司 | Low-frequency array vortex detection device and steel pipe inner wall corrosion defect detection method |
| US10749395B2 (en) * | 2018-04-19 | 2020-08-18 | Siemens Energy, Inc. | Assembly and method for preventing axial migration of springs in generator rotors |
| CN112114028B (en) * | 2020-08-26 | 2022-06-14 | 厦门大学 | Bolt hole edge crack monitoring method based on multi-field coupling sensor |
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| US3886793A (en) * | 1974-01-09 | 1975-06-03 | Us Navy | Projectile body testing machine |
| JPS5369691A (en) * | 1976-12-02 | 1978-06-21 | Sumitomo Metal Ind | Method and apparatus for automatic supersonic crack detection |
| GB2012047A (en) * | 1978-01-05 | 1979-07-18 | Boc Subocean Services Ltd | Non-destructive testing of welds |
| CA1122657A (en) * | 1978-12-01 | 1982-04-27 | David L. Atherton | Pipe surface testing carriage |
| JPS60164249A (en) * | 1984-02-07 | 1985-08-27 | Mitsubishi Electric Corp | Flaw detector |
| US4675604A (en) * | 1985-08-28 | 1987-06-23 | Exxon Production Research Co. | Computerized and motorized electromagnetic flux leakage internal diameter tubular inspection device |
| US4772849A (en) * | 1986-09-11 | 1988-09-20 | Combustion Engineering, Inc. | Rotating probe head for tube inspection |
| US4856337A (en) * | 1987-07-30 | 1989-08-15 | Westinghouse Electric Corp. | Apparatus and method for providing a combined ultrasonic and eddy current inspection of a tube |
| US4803563A (en) * | 1987-09-02 | 1989-02-07 | Westinghouse Electric Corp. | Rotor-in-stator examination magnetic carriage and positioning apparatus |
| US5025215A (en) * | 1989-08-16 | 1991-06-18 | Westinghouse Electric Corp. | Support equipment for a combination eddy current and ultrasonic testing probe for inspection of steam generator tubing |
| JP2511583B2 (en) * | 1990-05-24 | 1996-06-26 | ゼネラル・エレクトリック・カンパニイ | Reactor maintenance method |
-
1992
- 1992-06-22 TW TW081104878A patent/TW241410B/zh active
- 1992-06-25 IL IL102323A patent/IL102323A0/en unknown
- 1992-07-08 GB GB9214444A patent/GB2263777A/en not_active Withdrawn
- 1992-07-09 MX MX9204023A patent/MX9204023A/en unknown
- 1992-07-14 PL PL29527692A patent/PL295276A1/en unknown
- 1992-07-16 KR KR1019920012744A patent/KR930017268A/en not_active Application Discontinuation
- 1992-07-16 CN CN92105760A patent/CN1074973A/en active Pending
- 1992-07-17 BE BE9200668A patent/BE1005916A5/en not_active IP Right Cessation
- 1992-07-20 ES ES09201515A patent/ES2047453B1/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1967207B (en) * | 2005-10-20 | 2011-07-06 | 通用电气公司 | Phased array ultrasonic methods and systems for generator rotor teeth inspection |
| CN105965544A (en) * | 2016-05-27 | 2016-09-28 | 珠海上富电技股份有限公司 | Robot remote ultrasonic induction automatic testing system and control method thereof |
| CN105965544B (en) * | 2016-05-27 | 2018-08-03 | 珠海上富电技股份有限公司 | Robot remote ultrasonic sensing Auto-Test System and its control method |
| CN107070121A (en) * | 2017-03-14 | 2017-08-18 | 温州博诚汽车机电有限公司 | A kind of idle motors rotor assembly equipment |
| CN107907596A (en) * | 2017-11-17 | 2018-04-13 | 大连交通大学 | Ultrasonic rotating scan imaging apparatus and method |
| CN108802182A (en) * | 2018-06-14 | 2018-11-13 | 国网宁夏电力有限公司电力科学研究院 | The generator guard ring detection method of inner surface wave is encouraged based on graze |
| CN109458232A (en) * | 2018-10-16 | 2019-03-12 | 中广核核电运营有限公司 | A method of measurement cylinder partition low-lying area nest and its leaf top resistance vapour piece are concentric |
| CN109458232B (en) * | 2018-10-16 | 2021-02-12 | 中广核核电运营有限公司 | Method for measuring cylinder partition plate hollow pit and concentricity of leaf top steam-resistant sheet thereof |
| CN111845993A (en) * | 2020-08-21 | 2020-10-30 | 无锡中车时代智能装备有限公司 | Rotor crawling type generator bore detection robot device |
| CN111845993B (en) * | 2020-08-21 | 2023-05-09 | 无锡中车时代智能装备研究院有限公司 | Rotor crawling type in-bore detection robot device for generator |
Also Published As
| Publication number | Publication date |
|---|---|
| MX9204023A (en) | 1993-07-01 |
| ES2047453R (en) | 1996-01-01 |
| GB2263777A (en) | 1993-08-04 |
| GB9214444D0 (en) | 1992-08-19 |
| ES2047453B1 (en) | 1996-07-16 |
| IL102323A0 (en) | 1993-01-14 |
| ES2047453A2 (en) | 1994-02-16 |
| PL295276A1 (en) | 1993-08-23 |
| TW241410B (en) | 1995-02-21 |
| KR930017268A (en) | 1993-08-30 |
| BE1005916A5 (en) | 1994-03-08 |
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