CN104007386A - Comprehensive offline test platform of generator rotor insulation measurement device - Google Patents
Comprehensive offline test platform of generator rotor insulation measurement device Download PDFInfo
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- CN104007386A CN104007386A CN201410232842.XA CN201410232842A CN104007386A CN 104007386 A CN104007386 A CN 104007386A CN 201410232842 A CN201410232842 A CN 201410232842A CN 104007386 A CN104007386 A CN 104007386A
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Abstract
The invention discloses a comprehensive offline test platform of a generator rotor insulation measurement device. The comprehensive offline test platform of the generator rotor insulation measurement device comprises a rotary experimental platform and control console connected with the rotary experimental platform, wherein the rotary experimental platform comprises a motor, a sliding ring shaft, a sliding ring and a first carbon brush which are installed on the rotary experimental platform. The sliding ring shaft is connected to a driving shaft of the motor, and the sliding ring sleeves the sliding ring shaft and rotates with the sliding ring shaft. During testing, the motor can reach to a rated rotation speed, and the first carbon brush is lifted to be in contact with the sliding ring and output an electric signal. The control console comprises a motor power distribution and control loop, a carbon brush power distribution and control loop and an oscilloscope. During testing, the oscilloscope is used for recording waves, and the situation that waveforms of input electrical signals are free of clutters is confirmed. Accordingly, when the motor reaches to the rated rotation speed, the first carbon brush and the sliding ring are always in contact, and the first carbon brush does not bounce on the surface of the sliding ring. A test proves that the first carbon brush cannot bounce on the surface of the sliding ring, and accordingly the problem of ground protection false alarming of a generator rotor can be solved.
Description
Technical field
The present invention relates to generator rotor insulation measurement mechanism false alarm simulated experiment field, especially relate to the comprehensive off-line testing platform of a kind of generator rotor insulation measurement mechanism.
Background technology
Generator rotor insulation measurement mechanism adopts a pair of electromagnet or spring carbon brush contact slip ring power frequency Injection Signal to be applied between a utmost point and ground of rotor winding respectively, thereby measurement mechanism is measured Injection Current and calculated rotor insulation against ground value.
In operational process, because carbon brush is at the slip ring surface run_out of High Rotation Speed rotation, causes between measuring-signal electric current and have no progeny and connect again, because capacitance voltage can not suddenly change, cause wave form distortion, thereby measurement mechanism measuring error causes false alarm.
Must guarantee correct being adjusted and installing and just can avoid this false alarm of carbon brush and each parameter of slip ring.
Current where the shoe pinches is, carbon brush and slip ring are after during overhaul, dismounting completes, and generator does not have red switch before rated speed, and envelope test means are limited, are difficult to judge static installation quality.More difficult, by envelope test, can not guarantee that carbon brush is not at slip ring surface run_out after generator red switch completely.Once yet after generator red switch, the equipment appurtenance of carbon brush in High Rotation Speed, the High Rotation Speed of slip ring own; dismounting and adjustment again; if there is warning, can only wait for that next overhaul generator outage just can adjust, to equipment, operation brings larger interference.
Summary of the invention
The technical problem to be solved in the present invention is, provides a kind of generator rotor insulation measurement mechanism comprehensive off-line testing platform.
The technical solution adopted for the present invention to solve the technical problems is: construct the comprehensive off-line testing platform of a kind of generator rotor insulation measurement mechanism, comprise rotation test platform and the control desk being connected with described rotation test platform;
Described rotation test platform comprises motor, slip ring axle, slip ring and the first carbon brush being installed on described rotation test platform; Described slip ring axle is connected on the driving shaft of described motor, and described slip ring sleeve is contained on described slip ring axle and along with described slip ring axle rotation; During test, make described motor reach rated speed, by act, brush and described the first carbon brush is contacted and output electrical signals with described slip ring;
Described control desk comprises motor distribution and control loop, carbon brush distribution and control loop and oscillograph; During test, use described oscillograph record ripple, confirm that the waveform of described electric signal of input is without clutter, thereby guarantee when described motor reaches rated speed, described the first carbon brush and described slip ring keep in touch always and described the first carbon brush not at described slip ring surface run_out.
In comprehensive off-line testing platform of the present invention, described rotation test platform also comprises shaft coupling and rolling degree adjustment plate, the link of described slip ring axle is fixedly connected with described shaft coupling, described shaft coupling is connected in described rolling degree adjustment plate, and described rolling degree adjustment plate is fixedly connected on the driving shaft of described motor;
In described rolling degree adjustment plate, be provided with along its circumferential equally distributed screw to realize the adjustment of the rolling degree value of described slip ring axle; Between described shaft coupling and described rolling degree adjustment plate, be provided with the pad of changeable to realize the adjustment of the end face plane deviation value of described slip ring.
In comprehensive off-line testing platform of the present invention, described rotation test platform also comprises can drive the first carbon brush holder that described the first carbon brush vertically regulates and that along continuous straight runs regulates; Described the first carbon brush on described the first carbon brush holder vertically moves back and forth to carry out the adjustment of the radial play of described the first carbon brush and described slip ring; Described the first carbon brush along continuous straight runs on described the first carbon brush holder moves back and forth to carry out the adjustment in the tangential gap of described the first carbon brush and described slip ring.
In comprehensive off-line testing platform of the present invention, described rotation test platform also comprises carbon brush supports; Described the first carbon brush is fixed on described carbon brush supports; Described slip ring is provided with a plurality of described carbon brush supports along its circumferencial direction.
In comprehensive off-line testing platform of the present invention, described rotation test platform also comprises slip ring vibration detecting sensor; The vertical side horizontal side relative with two that described slip ring two is relative is all furnished with described slip ring vibration detecting sensor; When slip ring rotates, the voltage signal of the slip ring vibration detecting sensor output of the described two relative vertical sides horizontal side relative with two is accessed to described oscillograph, and observe change in voltage curve to carry out the detection of slip ring vibration signal.
In comprehensive off-line testing platform of the present invention, described rotation test platform also comprises phase detector probe; On described slip ring axle, be provided with one with the described phase detector adaptive groove/protruding key of popping one's head in, described phase detector probe is arranged on the position that described slip ring axle circumference is relative, and described phase detector probe is corresponding with described groove/protruding key; When slip ring axle rotate a circle and described phase detector probe and described groove/protruding key over against time, a pulse signal of described phase detector probe output; When slip ring axle rotates continuously, by described pulse count signal to carry out the measurement of the rotating speed of described slip ring axle.
In comprehensive off-line testing platform of the present invention, described rotation test platform also comprises the protective cover of the exposed parts that is removably mounted on described rotation test platform.
In comprehensive off-line testing platform of the present invention, described comprehensive off-line testing platform also comprises the carbon brush experiment porch being connected with described control desk, and described carbon brush experiment porch comprises for measuring carbon brush lifting force with the carbon brush lifting force testing table of act brush height with for measuring carbon brush displacement and lifting the carbon brush speedometer tester of brush speed.
In comprehensive off-line testing platform of the present invention, described carbon brush lifting force testing table comprises the second carbon brush, lifting force sensor and signal amplifier;
Described lifting force sensor be fixed on described the second carbon brush directly over and the distance between described lifting force sensor and described the second carbon brush adjustable, along the act brush direction of described the second carbon brush, be provided with the scale of lifting brush height for measuring; While lifting brush, described the second carbon brush pushes the lower surface of described lifting force sensor, described lifting force sensor converts the lifting force signal of described the second carbon brush to voltage signal output, after described voltage signal amplifies after described signal amplifier, by described oscillograph record ripple demonstration.
In comprehensive off-line testing platform of the present invention, described carbon brush speedometer tester comprises the 3rd carbon brush, displacement transducer;
Described displacement transducer be fixed on described carbon brush directly over and distance adjustable between described displacement transducer and described the 3rd carbon brush; Within a certain period of time, when the 3rd carbon brush is lifted to certain height described in displacement transducer sample and export corresponding simulating signal, described simulating signal is by described oscillograph record ripple and show.
Implement technical scheme of the present invention, at least there is following beneficial effect: by just slip ring and carbon brush, by on-the-spot size, be installed on the spin stand platform of test experiment platform of the present invention and test, confirm the correct adjusted and installation of each parameter of carbon brush and slip ring, thereby the off-line of having realized in overhaul process is identified again.During test, make motor reach rated speed, lift and swipe after work, use oscillograph record ripple, confirmation signal waveform without clutter after, can guarantee that carbon brush can be at slip ring surface run_out, thereby can solve generator rotor ground protection false alarm problem.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is the structural representation of the spin stand platform of the comprehensive off-line testing platform of generator rotor insulation measurement mechanism in one embodiment of the invention;
Fig. 2 is the cut-open view of the shaft coupling of the comprehensive off-line testing platform of generator rotor insulation measurement mechanism in one embodiment of the invention;
Fig. 3 is the front view of the rolling degree adjustment plate of the comprehensive off-line testing platform of generator rotor insulation measurement mechanism in one embodiment of the invention;
Fig. 4 is the front view of the carbon brush holder of the comprehensive off-line testing platform of generator rotor insulation measurement mechanism in one embodiment of the invention;
Fig. 5 is the stereographic map of the carbon brush holder of the comprehensive off-line testing platform of generator rotor insulation measurement mechanism in one embodiment of the invention;
Fig. 6 is the scheme of installation of the carbon brush supports of the comprehensive off-line testing platform of generator rotor insulation measurement mechanism in one embodiment of the invention;
Wherein, 1, motor; 11, driving shaft; 2, slip ring axle; 3, slip ring; 4, the first carbon brush; 5, shaft coupling; 6, rolling degree adjustment plate; 61, screw; 7, carbon brush holder; 71, holding screw; 72, vertical adjusting screw; 73, Level tune screw; 74, horizontal slide rail; 8, carbon brush supports.
Embodiment
For technical characterictic of the present invention, object and effect being had more clearly, understand, now contrast accompanying drawing and describe the specific embodiment of the present invention in detail.
Be the comprehensive off-line testing platform of generator rotor insulation measurement mechanism in the present invention as shown in Figures 1 to 5, Fig. 1 is the structural representation of the spin stand platform of the comprehensive off-line testing platform of generator rotor insulation measurement mechanism in one embodiment of the invention.Fig. 2 is the cut-open view of the shaft coupling of the comprehensive off-line testing platform of generator rotor insulation measurement mechanism in one embodiment of the invention.Fig. 3 is the front view of the rolling degree adjustment plate of the comprehensive off-line testing platform of generator rotor insulation measurement mechanism in one embodiment of the invention.Fig. 4 is the front view of the carbon brush holder of the comprehensive off-line testing platform of generator rotor insulation measurement mechanism in one embodiment of the invention.Fig. 5 is the stereographic map of the carbon brush holder of the comprehensive off-line testing platform of generator rotor insulation measurement mechanism in one embodiment of the invention.Fig. 6 is the scheme of installation of the carbon brush supports of the comprehensive off-line testing platform of generator rotor insulation measurement mechanism in one embodiment of the invention.
The comprehensive off-line testing platform of this generator rotor insulation measurement mechanism can carry out comprehensive envelope test to the first carbon brush 4 and slip ring 3.And after the first carbon brush 4 and slip ring 3 are pressed to raw parameter and installed, the dynamic test that can carry out emulation, truly predicts ruuning situation under rated speed of the first carbon brush 4 and slip ring 3 and whether there will be warning.
This comprehensive off-line testing platform comprises rotation test platform.Consult Fig. 1, in certain embodiments, this rotation test platform comprises motor 1, slip ring axle 2, slip ring 3 and the first carbon brush 4 being installed on this rotation test platform.This slip ring axle 2 is connected on the driving shaft 11 of this motor 1, and this slip ring 3 is sleeved on this slip ring axle 2 and along with these slip ring axle 2 rotations.During test, make this motor 1 reach rated speed, by act, brush and this first carbon brush 4 is contacted and output electrical signals with this slip ring 3.Usually, the conductor that contacts of the first carbon brush 4 and slip ring 3 the two composition slip, plays a part conduction protection Injection Signal.
This comprehensive off-line testing platform comprises the control desk being connected with above-mentioned rotation test platform.In certain embodiments, this control desk comprises distribution and control loop and the oscillograph of the distribution of motor 1 and control loop, the first carbon brush 4.During test, use this oscillograph record ripple, confirm that the waveform of above-said current signal of input is without clutter, thereby guarantee when motor 1 reaches rated speed, this first carbon brush 4 and this slip ring 3 keep in touch always and the first carbon brush 4 not at slip ring 3 surface run_outs.Usually, the Main Function of this control desk is the distribution for equipment such as spin stand platforms, and the coherent signal of slip ring 3, the first carbon brush 4 is carried out to acquisition and recording, and control, protection, demonstration, the record wave energy of realizing system.
To sum up; by slip ring 3 and the first carbon brush 4 being installed to by on-the-spot size on the spin stand platform of test experiment platform of the present invention, test; confirm the correct adjusted and installation of each parameter of the first carbon brush 4 and slip ring 3; thereby the off-line of having realized in overhaul process is identified again; during test; make motor 1 reach rated speed; lift and swipe after work; use oscillograph record ripple; confirmation signal waveform without clutter after; can guarantee that the first carbon brush 4 can be at slip ring 3 surface run_outs, thereby can solve generator rotor ground protection false alarm problem.
In addition, the rotating speed of the motor 1 using on spin stand platform of the present invention can be adjusted between 0-1500 rev/min, and adjustable benefit is: first, with low rate start, starting current is little, reduces the capacity requirement to field power supply.Secondly, in boosting velocity procedure, can observe the vibration signal of motor 1, if vibrate the excessive raising speed that stops, slip ring 3 rolling degree etc. be checked to adjustment.Avoiding being directly raised to rated speed occurs dangerous.Again, can accurate adjustment to 1500 rev/min, in full accord with slip ring 3 actual running speeds, thus check the most realistically the situation that contacts of slip ring 3 and the first carbon brush 4.
This rotation test platform also can comprise shaft coupling 5 and rolling degree adjustment plate 6, the link of slip ring axle 2 is fixedly connected with shaft coupling 5, shaft coupling 5 is connected in rolling degree adjustment plate 6, rolling degree adjustment plate 6 is fixedly connected on the driving shaft 11 of motor 1, and slip ring axle 2 is connected on the driving shaft 11 of motor 1 by shaft coupling 5 and rolling degree adjustment plate 6.
Consult Fig. 2 to Fig. 3, in certain embodiments, the Main Function of this shaft coupling 5 and rolling degree adjustment plate 6 is for connecting driving shaft 11 and the slip ring axle 2 of motor 1 and making it jointly to rotate with transmitting torque.And in this rolling degree adjustment plate 6, be provided with along its circumferential equally distributed screw 61 to realize the adjustment of the rolling degree value of this slip ring axle 2.Understandably, in rolling degree adjustment plate, can also arrange along its circumferential equally distributed through hole or counter sink etc. and substitute screw, but be arranged to screw be in the present invention preferred embodiment.In addition, this screw 61 is along the circumferential distribution of rolling degree adjustment plates 6, can evenly be processed into four, eight or 16 etc.In rolling degree adjustment plate in the present invention, preferably process four screws.
During adjustment, by adding adjusting screw or jackscrew in the screw 61 in rolling degree adjustment plate 6, by regulating the precession degree of adjusting screw of all directions or the degree that stretches into of the jackscrew of adjusting all directions, can adjust very easily slip ring axle 2 and carry out different off-centrings, by use clock gauge, coordinate again, thereby can adjust to the rolling degree value needing.The setting range of rolling degree value is 0mm to 1mm.
Further, the pad that is provided with changeable between this shaft coupling 5 and this rolling degree adjustment plate 6 is worth adjusting to realize the end face plane deviation of this slip ring 3, between shaft coupling 5 and rolling degree adjustment plate 6, increases and decreases the end face plane deviation value that pad is adjusted slip ring 3.The setting range of end face plane deviation value is 0mm to 1mm.
This rotation test platform also can comprise can drive carbon brush holder 7 that the first carbon brush 4 vertically regulates, that along continuous straight runs regulates, and this first carbon brush 4 is fixed on this carbon brush holder 7.
In certain embodiments, the first carbon brush 4 on this carbon brush holder 7 vertically moves back and forth to carry out the adjustment of this first carbon brush 4 and the radial play of this slip ring 3, during adjustment, by use, be used for measurement clearance size clearance gauge and coordinate, just can carry out very easily the radial play adjustment of the first carbon brush 4 and slip ring 3.Setting range is 0mm to 15mm.
The first carbon brush 4 along continuous straight runs on this carbon brush holder 7 move back and forth to carry out the adjustment in this first carbon brush 4 and the tangential gap of this slip ring 3, during adjustment, by using a clock gauge to find the center of slip ring axle 2, just can carry out very easily the tangential gap adjustment of the first carbon brush 4 and slip ring 3.Setting range is 0mm to 15mm.
Understandably, this carbon brush holder 7 be equivalent to one can conveniently drive the first carbon brush 4 vertically, the chain-wales that regulates of horizontal direction, as long as can drive the first carbon brush 4 vertically, the device that regulates of horizontal direction is all in the protection domain of this aspect.
Consult Fig. 4 to Fig. 5, on carbon brush holder 7 in one embodiment of the invention, be provided with vertical adjusting screw 72 and the Level tune screw 71 for driving the first carbon brush 4 along continuous straight runs to regulate for driving the first carbon brush 4 vertically to regulate, and for fixing holding screw 71 and the horizontal slide rail 74 for sliding for carbon brush holder 7 along continuous straight runs of the first carbon brush 4.While carrying out Level tune, first tighten holding screw 71 the first carbon brush 4 is fixed on carbon brush holder 7 firmly, then the Level tune screw 73 of turn bottom, make carbon brush holder 7 along horizontal slide rail 74, slide to realize the Level tune of the first carbon brush 4.While carrying out vertical adjusting, first unclamp holding screw 71, make the first carbon brush 4 loosening, then the vertical adjusting screw 72 of turn the first carbon brush 4 bottoms, make the first carbon brush 4 vertically rise certain height to realize the vertical adjusting of the first carbon brush 4.
Further, realize the first carbon brush 4 vertically, the adjusting of horizontal direction both can adopt mechanical regulative mode, also can adopt the automatic control and adjustment mode of electric automatization, under actual conditions, can carry out customization to a certain degree according to the accuracy requirement of measuring.
Further, the first carbon brush 4 and the axial and radial play of slip ring 3 are adjusted to different value, and record ripple and check and the relation of clutter by oscillograph, can find out optimal gap width, be convenient to next step actual installation and adjustment.
In addition, not only can the tangential and radial play adjustment with slip ring 3 for the first carbon brush 4 with the rotation test platform of this carbon brush holder 7, in the time of can also be for the first carbon brush 4 static force measurement, adjust the gap of the first carbon brush 4 and slip ring 3.
Except above-mentioned carbon brush holder 7, rotation test platform of the present invention also can comprise carbon brush supports 8.
In certain embodiments, this first carbon brush 4 is fixed on this carbon brush supports 8, and slip ring 2 is provided with a plurality of these carbon brush supports 8 along its circumferencial direction.Further, as preferably, the vertical side of slip ring 3, horizontal side and 45 ° of sides all can be provided with carbon brush supports 8, but, under normal conditions, can be only in one of them position of vertical side, horizontal side and 45 ° of sides of slip ring 3, carbon brush supports 8 be set, can reaches test demand; And the carbon brush supports 8 of 45 ° of sides and the carbon brush supports 8 of horizontal side can not installed simultaneously.Consult Fig. 6, in Fig. 6 the value of α be preferably 45 °, in the present embodiment, the vertical side of this slip ring 3, horizontal side and 45 ° of sides are provided with carbon brush supports 8, and the benefit arranging is like this that simultaneously vertical side, horizontal side and the 45 ° of sides at above-mentioned slip ring 3 arrange carbon brush supports 8 and can make test findings more accurate.Understandably, in the present invention, α can also get other value, and concrete numerical value can be got suitable value according to experiment purpose.
Further, between this carbon brush supports 8 and slip ring 3, distance can regulate according to actual service condition, and range of adjustment is 0mm to 5mm.
Motor 1 can produce certain vibration when work, and the slip ring axle 2 being connected with the driving shaft 11 of motor 1 and the slip ring 3 on slip ring axle 2 also there will be certain vibration.In order to detect the vibration of slip ring 3, this rotation test platform also can comprise slip ring vibration detecting sensor.
In certain embodiments, 3 liang of relative vertical sides of this slip ring horizontal side relative with two is all furnished with this slip ring vibration detecting sensor.Usually, between this slip ring vibration detecting sensor and slip ring 3, distance can regulate according to actual service condition.Understandably, the mounting means of this slip ring vibration detecting sensor has a variety of, such as buckle installation, bonding installation or screw thread installation etc.The mode that has preferably adopted screw thread to install in some embodiments of the present invention is fixed on this slip ring vibration detecting sensor on the vertical side of this slip ring 3 and the fixed support of horizontal side.
When slip ring 3 rotates, the voltage signal of the slip ring vibration detecting sensor output of the two relative vertical sides horizontal side relative with two is accessed to this oscillograph, and observe change in voltage curve to carry out the detection of slip ring 3 vibration signals.Understandably, this slip ring vibration detecting sensor can be selected conventional current vortex sensor in industry, has preferably adopted the current vortex sensor of the model KD2306 of U.S. KAMAN company in the present invention.During concrete detection, slip ring 3 can be divided into large slip ring shaft and negative slip ring, in large slip ring shaft vertical side, horizontal side and negative slip ring vertical side, level, survey the current vortex sensor of arranging this model respectively, vibration for detection of slip ring 3 under different situations, the current vortex sensor of this model adopts 24VDC power supply, select the output of 0-10VDC signal, thereby the voltage signal access oscillograph of four direction is observed to change in voltage curve judgement slip ring 3 Vibration Conditions.
Further, for fear of affecting testing result, should take certain vibration reducing measure to reduce the vibration between the vertical side of this slip ring 3 and the fixed support of horizontal side and rotation test platform.
Further, the detection of slip ring vibration signal is combined with the adjustment of slip ring axle 2 rolling degree, can be by slip ring 3 being adjusted to different rolling degree, measuring-signal waveform, and 3 vibrations of monitoring slip ring, find out the maximum rolling degree value that can make signal produce clutter, thereby determine overhaul Plays value.
The detection of slip ring vibration signal and slip ring 3 end face plane deviations are worth adjusting and combine, can be by slip ring 3 being adjusted to different end face plane deviation values, and monitoring slip ring 3 vibrations, measuring-signal waveform, find out the maximum rolling degree value that can make signal produce clutter, thereby determine the standard value in overhaul.
In certain embodiments, this rotation test platform also can comprise phase detector probe.On slip ring axle 2, be provided with one with the phase detector adaptive groove/protruding key of popping one's head in, phase detector probe is arranged on the position that slip ring axle 2 circumferences are relative, and phase detector probe is corresponding with groove/protruding key; When slip ring axle 2 rotate a circle and phase detector probe and groove/protruding key over against time, a pulse signal of phase detector probe output; When slip ring axle 2 rotates continuously, by pulse signals, count to carry out the measurement of the rotating speed of slip ring axle 2.By this phase detector probe and described oscillographic cooperation carrying out slip ring axle 2 phase place beacon signal and detect.
When slip ring axle 2 rotates continuously, in the oscillogram showing on oscillograph, the timetable of this pulse signal genration understands that slip ring axle 2 is in the interim position of every turn-week.By to this pulse count signal to carry out the measurement of the rotating speed of this slip ring axle 2, again the oscillogram of the vibration signal of the oscillogram of this pulse signal and slip ring axle 2 is compared, can determine the phasing degree of the vibration of this slip ring axle 2, thereby for aspects such as the dynamic balance analysis of slip ring axle 2 and the fault analysis of equipment and diagnosis.
Further, the mode that groove or protruding key are set can also detect for carrying out motor 1 tach signal, in the present invention preferably by opening a shallow slot for connecting on the shaft coupling of driving shaft 11 of motor 1, adopt the IGW201 inductance type transducer of German IFM company to carry out motor 1 axle phasing degree pulse signal detection, motor 1 axle phasing degree pulse signal can directly be inputted oscillograph DL750, sensor output terminal is connected to XJP-48F series digit display instrument simultaneously, carry out tachometric survey and demonstration.
In certain embodiments, this rotation test platform also can comprise the protective cover of the exposed parts that is removably mounted on this rotation test platform.The Main Function of protective cover is excessively to cause slip ring 3 equipment such as grade to come off to hurt sb.'s feelings because vibrating in order to prevent in process of the test, and the personnel that prevent contact slewing in rotary course.Understandably, this protective cover material and shape can be according to need not the improving of the situation of exposed parts accordingly, and the protective cover in the present invention preferably adopts steel plate and the angle steel that 2mm is thick to be welded.
Except above-mentioned rotation test platform, this comprehensive off-line testing platform also can comprise the carbon brush experiment porch being connected with this control desk.This carbon brush experiment porch comprises for measuring carbon brush lifting force with the carbon brush lifting force testing table of act brush height with for measuring carbon brush displacement and lifting the carbon brush speedometer tester of brush speed.
In certain embodiments, this carbon brush lifting force testing table comprises the second carbon brush (not shown), lifting force sensor and signal amplifier.The second carbon brush herein and the structure of the first carbon brush 4 are in full accord, just as different subjects, are arranged on different test platforms respectively.
The top of this lifting force sensor fix and its level altitude adjustable.This second carbon brush is arranged on the below of this lifting force sensor, and screw rod can be installed in this lifting force sensor bottom, under this screw rod, can be processed into plane, produces the acting surface of lifting brush power while lifting brush as the second carbon brush.Understandably, the generation type of this acting surface has a variety of, and the mode that processes acting surface by screw rod is the preferably embodiment in the present invention.And the act brush direction along this second carbon brush is provided with scale in the both sides of this lifting force support.The Main Function of this scale is to be convenient to observe and to record and lift brush height.
While lifting brush, this second carbon brush pushes the lower surface of this lifting force sensor, and this lifting force sensor converts the lifting force signal of this second carbon brush to voltage signal output, after this voltage signal amplifies after this signal amplifier, by this oscillograph, is recorded ripple and is shown.In the present invention, lifting force sensor has preferably adopted the S type tension-compression sensor of U.S. Celtron, and signal amplifier adopts the C & V signal amplifier of U.S.'s power transmission electronics.During concrete enforcement, C & V signal amplifier provides 10VDC pumping signal for S type sensor, S type sensor carries out piezoelectricity to carbon brush lifting force signal and converts the output of mV signal to, after this signal leading C & V signal amplifier is returned to zero, amplified, convert V magnitude voltage signals to, and record ripple and show by oscillograph.
By above-mentioned carbon brush speedometer tester, can measure a plurality of numerical value of lifting brush pressure and lifting brush height, then using and lift brush pressure and lift brush height and draw out both curve maps as two variablees, thereby in reflection overhaul, carbon brush is carried out the effect of Disintegration overhaul.
In certain embodiments, this carbon brush speedometer tester comprises the 3rd carbon brush (not shown), displacement transducer.The structure of the 3rd carbon brush herein and the first carbon brush 4, the second carbon brush is in full accord, just as different subjects, is arranged on different test platforms respectively.
This displacement transducer be fixed on the 3rd carbon brush directly over and the distance between this displacement transducer and the 3rd carbon brush adjustable, the scope of adjusting is 40mm to 100mm.Within a certain period of time, when the 3rd carbon brush is lifted to certain height, this displacement transducer is sampled and is exported corresponding simulating signal, and this simulating signal is by this oscillograph record ripple demonstration.
In the present invention, it is FT50RLA-20-S-L4S laser sensor that displacement transducer has preferably adopted German Sensopart model, laser sensor is fixed on directly over the 3rd carbon brush, laser sensor and the 3rd carbon brush distance adjustment is fixing to being greater than after 40mm (this laser sensor initial measurement distance is 40mm).While lifting brush, the 3rd carbon brush rises about 4mm in 0.1s-0.2s, and laser sensor sampled point in 0.1-0.2s is 100-200, and 100-200 voltage signal point of corresponding output, introduces oscillograph by this simulating signal, forms change in voltage curve.
By above-mentioned carbon brush speedometer tester, can measure carbon brush displacement and lift a plurality of numerical value of brush speed, then the carbon brush displacement of usining is drawn out both curve maps with act brush speed as two variablees, thereby in reflection overhaul, the 3rd carbon brush is carried out the effect of Disintegration overhaul.
This is only the preferred embodiments of the present invention above, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes, combination and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in claim scope of the present invention.
Claims (10)
1. the comprehensive off-line testing platform of generator rotor insulation measurement mechanism, is characterized in that, comprises rotation test platform and the control desk being connected with described rotation test platform;
Described rotation test platform comprises motor (1), slip ring axle (2), slip ring (3) and the first carbon brush (4) being installed on described rotation test platform; Described slip ring axle (2) is connected on the driving shaft (11) of described motor (1), and described slip ring (3) is sleeved on described slip ring axle (2) and along with described slip ring axle (2) rotation; During test, make described motor (1) reach rated speed, by act, brush and described the first carbon brush (4) is contacted and output electrical signals with described slip ring (3);
Described control desk comprises motor distribution and control loop, carbon brush distribution and control loop and oscillograph; During test, use described oscillograph record ripple, the waveform of the described electric signal of confirmation input is without clutter, thereby guarantee when described motor (1) reaches rated speed, described the first carbon brush (4) and described slip ring (3) keep in touch always and described the first carbon brush (4) not at described slip ring (3) surface run_out.
2. comprehensive off-line testing platform according to claim 1, it is characterized in that, described rotation test platform also comprises shaft coupling (5) and rolling degree adjustment plate (6), the link of described slip ring axle (2) is fixedly connected with described shaft coupling (5), it is upper that described shaft coupling (5) is connected to described rolling degree adjustment plate (6), and described rolling degree adjustment plate (6) is fixedly connected on the driving shaft (11) of described motor (1);
In described rolling degree adjustment plate (6), be provided with along its circumferential equally distributed screw (61) to realize the adjustment of the rolling degree value of described slip ring axle (2); Between described shaft coupling (5) and described rolling degree adjustment plate (6), be provided with the pad of changeable to realize the adjustment of the end face plane deviation value of described slip ring (3).
3. comprehensive off-line testing platform according to claim 1, is characterized in that, described rotation test platform also comprises can drive described the first carbon brush (4) vertically and first carbon brush holder (7) of horizontal direction adjusting; Described the first carbon brush (4) on described the first carbon brush holder (7) vertically moves back and forth to carry out the adjustment of described the first carbon brush (4) and the radial play of described slip ring (3); Described the first carbon brush (4) along continuous straight runs on described the first carbon brush holder (7) moves back and forth to carry out the adjustment in described the first carbon brush (4) and the tangential gap of described slip ring (3).
4. comprehensive off-line testing platform according to claim 1, is characterized in that, described rotation test platform also comprises carbon brush supports (8); Described the first carbon brush (4) is fixed on described carbon brush supports (8); Described slip ring (3) is upper is provided with a plurality of described carbon brush supports (8) along its circumferencial direction.
5. comprehensive off-line testing platform according to claim 1, is characterized in that, described rotation test platform also comprises slip ring vibration detecting sensor; The vertical side horizontal side relative with two that described slip ring (3) two is relative is all furnished with described slip ring vibration detecting sensor; When slip ring (3) rotates, the voltage signal of the slip ring vibration detecting sensor output of the described two relative vertical sides horizontal side relative with two is accessed to described oscillograph, and observe change in voltage curve to carry out the detection of slip ring vibration signal.
6. comprehensive off-line testing platform according to claim 1, is characterized in that, described rotation test platform also comprises phase detector probe; On described slip ring axle (2), be provided with one with the described phase detector adaptive groove/protruding key of popping one's head in, described phase detector probe is arranged on the position that described slip ring axle (2) circumference is relative, and described phase detector probe is corresponding with described groove/protruding key; When slip ring axle (2) rotate a circle and described phase detector probe and described groove/protruding key over against time, a pulse signal of described phase detector probe output; When slip ring axle (2) rotates continuously, by described pulse count signal to carry out the measurement of the rotating speed of described slip ring axle (2).
7. comprehensive off-line testing platform according to claim 1, is characterized in that, described rotation test platform also comprises the protective cover of the exposed parts that is removably mounted on described rotation test platform.
8. comprehensive off-line testing platform according to claim 1, it is characterized in that, described comprehensive off-line testing platform also comprises the carbon brush experiment porch being connected with described control desk, and described carbon brush experiment porch comprises for measuring carbon brush lifting force with the carbon brush lifting force testing table of act brush height with for measuring carbon brush displacement and lifting the carbon brush speedometer tester of brush speed.
9. comprehensive off-line testing platform according to claim 8, is characterized in that, described carbon brush lifting force testing table comprises the second carbon brush, lifting force sensor and signal amplifier;
Described lifting force sensor be fixed on described the second carbon brush directly over and the distance between described lifting force sensor and described the second carbon brush adjustable, along the act brush direction of described the second carbon brush, be provided with the scale of lifting brush height for measuring; While lifting brush, described the second carbon brush pushes the lower surface of described lifting force sensor, described lifting force sensor converts the lifting force signal of described the second carbon brush to voltage signal output, after described voltage signal amplifies after described signal amplifier, by described oscillograph record ripple demonstration.
10. comprehensive off-line testing platform according to claim 8, is characterized in that, described carbon brush speedometer tester comprises the 3rd carbon brush, displacement transducer;
Described displacement transducer be fixed on described the 3rd carbon brush directly over and distance adjustable between described displacement transducer and described the 3rd carbon brush; Within a certain period of time, when the 3rd carbon brush is lifted to certain height described in displacement transducer sample and export corresponding simulating signal, described simulating signal is by described oscillograph record ripple and show.
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