CN106768509A - A kind of adjustable testing transformer of winding stress - Google Patents
A kind of adjustable testing transformer of winding stress Download PDFInfo
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- CN106768509A CN106768509A CN201611059204.8A CN201611059204A CN106768509A CN 106768509 A CN106768509 A CN 106768509A CN 201611059204 A CN201611059204 A CN 201611059204A CN 106768509 A CN106768509 A CN 106768509A
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- 238000004804 winding Methods 0.000 title claims abstract description 60
- 238000012360 testing method Methods 0.000 title claims abstract description 30
- 239000002828 fuel tank Substances 0.000 claims description 20
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 17
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 239000000835 fiber Substances 0.000 claims description 11
- 239000013307 optical fiber Substances 0.000 claims description 11
- 229910052742 iron Inorganic materials 0.000 claims 1
- 238000012544 monitoring process Methods 0.000 abstract description 18
- 238000002474 experimental method Methods 0.000 abstract description 8
- 238000004088 simulation Methods 0.000 abstract description 6
- 238000013461 design Methods 0.000 abstract description 4
- 238000011160 research Methods 0.000 abstract description 3
- 230000003287 optical effect Effects 0.000 description 26
- 230000035882 stress Effects 0.000 description 16
- 230000005540 biological transmission Effects 0.000 description 9
- 230000007547 defect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000009466 transformation Effects 0.000 description 7
- 230000008859 change Effects 0.000 description 4
- 230000008054 signal transmission Effects 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000010287 polarization Effects 0.000 description 3
- 230000006978 adaptation Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 230000005622 photoelectricity Effects 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
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- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000005520 electrodynamics Effects 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000004643 material aging Methods 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L1/00—Measuring force or stress, in general
- G01L1/16—Measuring force or stress, in general using properties of piezoelectric devices
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The invention discloses a kind of adjustable testing transformer of winding stress, including：Transformer body, hold-down gear, piezoelectric transducer group, vibrating sensor and processor；The piezoelectric transducer group includes the first piezoelectric transducer and the second piezoelectric transducer.By the thrust that the hold-down gear powerstat winding is overall and local；The axial electric power that winding is subject to when first piezoelectric transducer is used for thrust and the experiment of real-time monitoring coil；Second piezoelectric transducer is used for the radial convergent force of real-time monitoring coil；The vibrating sensor can monitor the vibration that transformer is produced in actual motion.Simple structure of the present invention, can flexible modulation winding stress, and structure is safe and reliable, can truly analogue transformer winding loosen, the stressing conditions in failed shorted and actual motion during transformer winding vibration, can be used for the fields such as design ＆ check, fault simulation, test monitoring and the scientific research of transformer.
Description
Technical field
The present invention relates to high-voltage test techniques field, more particularly to a kind of adjustable testing transformer of winding stress.
Background technology
Transformer belongs to power network nucleus equipment, plays the effect such as voltage transformation, power transmission and insulation blocking, thus transformation
The health status of device is related to the safety and stability of whole power network.When stable state or transient state are run, its winding can be subject to transformer
Electrodynamic effect, causes transformer to vibrate aggravation, connection loosing, hydraulic performance decline, and winding deformation, exhausted may be caused when serious
Edge destruction even burnout failure.
In Design of Transformer, designer can carry out simulation calculation to the stressing conditions of Transformer Winding, to ensure transformation
Device winding can bear certain electric power.At present, mainly verified by short-circuit test, but this test method is not
Winding stressing conditions can be monitored；In transformer by long-distance transport, assembling, long-play and the short circuit of multiple low current
Afterwards, internal structure is loosened, the situation of material aging cannot be avoided, and Transformer Winding bears electricity under there is no method to assess this state at present
The ability of power so that inside transformer defect cannot truly be reflected；Reinforced in transformer reparation, winding and structure is excellent
During change etc., it is also desirable to technical support is tested and assessed or provided to effect, and at present can only be by calculating or other experiment knots
Fruit reflection indirectly.
The content of the invention
Goal of the invention of the invention is to provide a kind of adjustable testing transformer of winding stress, to solve current transformer
Winding stress can not directly be monitored and adjusted, and internal flaw cannot obtain the problem for truly reflecting.
Embodiments in accordance with the present invention, there is provided a kind of adjustable testing transformer of winding stress, including transformer body,
The transformer body includes：Fuel tank, the iron core located at the fuel tank internal, the coil being sheathed on outside the iron core and institute
State lower clamping piece that the upper clamping piece that the upper yoke of iron core is connected is connected with the lower yoke of the iron core and outside the fuel tank
Outgoing line device on wall；
The fuel tank internal is additionally provided with hold-down gear, piezoelectric transducer group and vibrating sensor；The testing transformer is also
Including the processor outside the fuel tank；
The piezoelectric transducer group includes：First piezoelectric transducer and the second piezoelectric transducer；
The coil is connected with the hold-down gear by first piezoelectric transducer；
Second piezoelectric transducer is located in the space between the coil and the iron core；
The vibrating sensor is located at the outer surface of the coil；
First piezoelectric transducer, second piezoelectric transducer and the vibrating sensor respectively with the processor
It is connected.
Preferably, the hold-down gear includes：Cushion block, suppress part, screw rod and nut；The part that suppresses is with the described first pressure
Electric transducer is connected by the cushion block；The screw rod is through the screw set by the upper clamping piece；One end of the screw rod with
The part that suppresses is connected；The other end of the screw rod is located at the outside of the fuel tank, and is fastenedly connected with the nut.
Preferably, first piezoelectric transducer and second piezoelectric transducer are fiber optic conduction formula piezoelectric transducer.
Preferably, the vibrating sensor is fiber optic conduction formula vibrating sensor.
Preferably, the adjustable testing transformer of winding stress also includes optical-electrical converter；First piezoelectric sensing
Device is connected with the input of the optical-electrical converter by optical fiber；Second piezoelectric transducer and the optical-electrical converter
Input is connected by optical fiber；The vibrating sensor is connected with the input of the optical-electrical converter by optical fiber；Institute
The output end for stating optical-electrical converter is connected with the processor by cable.
Preferably, the vibrating sensor is displacement transducer.
Preferably, the part that suppresses is provided with groove, and one end of the screw rod is located in the groove.
A kind of adjustable testing transformer of winding stress provided from above technical scheme, the present invention, including：Transformation
Device main body, hold-down gear, piezoelectric transducer group, vibrating sensor and processor；The piezoelectric transducer group includes the first piezoelectricity
Sensor and the second piezoelectric transducer.By the thrust that the hold-down gear powerstat winding is overall and local；Institute
The axial electric power that winding is subject to when stating the first piezoelectric transducer for the thrust of real-time monitoring coil and experiment；Described second
Piezoelectric transducer is used for the radial convergent force of real-time monitoring coil；The vibrating sensor can monitor transformer in actual motion
The vibration of middle generation.Simple structure of the present invention, can flexible modulation winding stress, and structure is safe and reliable, can truly simulate transformation
The loosening of device winding, failed shorted and the stressing conditions in actual motion during transformer winding vibration, can be used for the design of transformer
The fields such as check, fault simulation, test monitoring and scientific research.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing for needing to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the invention
Example, for those of ordinary skill in the art, on the premise of not paying creative work, can also obtain according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is to be preferable to carry out the overall structure main view of a kind of adjustable testing transformer of winding stress that exemplifies according to one
Figure；
Fig. 2 is to be overlooked according to the overall structure of a kind of adjustable testing transformer of winding stress for being preferable to carry out exemplifying
Figure；
Fig. 3 is to be preferable to carry out the structural representation of hold-down gear that exemplifies according to one.
Wherein, 1- coils, 2- iron cores, 3- upper clamping pieces, 4- lower clamping pieces, 5- fuel tanks, 6- outgoing line devices, 7- hold-down gears, 8-
Piezoelectric transducer group, 9- vibrating sensors, 10 optical-electrical converters, 11- processors, 31- screws, 71- cushion blocks, 72- suppresses part,
73- screw rods, 74- nuts, the piezoelectric transducers of 81- first, the piezoelectric transducers of 82- second, 721- grooves.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Whole description, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
The present embodiment provides a kind of adjustable testing transformer of winding stress, as depicted in figs. 1 and 2, including transformer master
Body, the transformer body includes：Fuel tank 5, the iron core 2 inside the fuel tank 5, the line being sheathed on outside the iron core 2
Lower clamping piece 4 and set that the upper clamping piece 3 that circle 1 is connected with the upper yoke of the iron core 2 is connected with the lower yoke of the iron core 2
Outgoing line device 6 on the outer wall of the fuel tank 5, wherein, the lead-out wire of the coil 1 draws described by the outgoing line device 6
Outside fuel tank 5；
Hold-down gear 7, piezoelectric transducer group 8 and vibrating sensor 9 are additionally provided with inside the fuel tank 5；The experiment transformation
Device also includes the processor 11 outside the fuel tank 5；
The piezoelectric transducer group 8 includes：First piezoelectric transducer 81 and the second piezoelectric transducer 82；
The coil 1 is connected with the hold-down gear 7 by first piezoelectric transducer 81；
Second piezoelectric transducer 82 is located in the space between the coil 1 and the iron core 2；
The vibrating sensor 9 is located at the outer surface of the coil 1；
First piezoelectric transducer 81, second piezoelectric transducer 82 and the vibrating sensor 9 respectively with it is described
Processor 11 is connected.
In the present embodiment, the structure of the hold-down gear 7 as shown in figure 3, including：Cushion block 71, suppress part 72, the and of screw rod 73
Nut 74.Wherein, the part 72 that suppresses is connected with first piezoelectric transducer 81 by the cushion block 71；The screw rod 73
Through the screw 31 set by the upper clamping piece 3；One end of the screw rod 73 is connected with the part 72 that suppresses；The screw rod 73
The other end is located at the outside of the fuel tank 5, and is fastenedly connected with the nut 74.
In the hold-down gear 7, thrust by the screw rod 73, described suppress part 72 and the cushion block 71 is acted on
The coil 1.Nut 74 described in turn, make the precession of the screw rod 73, now, 71 pairs of thrusts of the coil 1 of the cushion block
Gradually increase；Nut 74 described in turn, screw out the screw rod 73, now, 71 pairs of thrusts of the coil 1 of the cushion block by
It is decrescence small.During experiment, the elasticity of the fastening of the nut 74 can be according to actual needs adjusted, you can realize to Transformer Winding pressure
The flexible modulation of clamp force, operation is simple and reliable, can the loosening defect that is produced in actual motion of analogue transformer winding.
In the present embodiment, the winding of step-up transformer is provided between four hold-down gears 7, each hold-down gear 7
Every 90 °.When four hold-down gears 7 are compressed to the coil 1, can analogue transformer winding produced in actual motion
Overall loosen defect；When being compressed to the coil 1 less than four hold-down gears, can analogue transformer winding in reality
The local loosening defect produced in the operation of border.For step-down transformer, the quantity of its hold-down gear 7, set-up mode and pine
Dynamic defects simulation can refer to the step-up transformer, will not be repeated here.
It should be noted that for step-up transformer and step-down transformer, the quantity of the hold-down gear 7 and its specifically set
The mode of putting is not limited to quantity and set-up mode described in the present embodiment, can be needed to be chosen and set according to actual tests.
First piezoelectric transducer 81 be used for monitor 7 pairs of thrusts of the coil 1 of the hold-down gear, experiment when around
The axial electric power that group is subject to.The principle of piezoelectric transducer is mainly piezo-electric effect, and it is using electrical equipment and other machineries
Pressure signal to be measured is converted into electric signal, then carries out the fine measuring instrument of measurement of correlation work, with small volume, weight
The advantages of measuring light, sensitivity high and big signal to noise ratio.
Carrying out transformer assembling, and when carrying out winding and loosen defects simulation and test by adjusting the hold-down gear 7,
While act on first piezoelectric transducer 81, first piezoelectric transducer 81 is by institute for thrust that the coil 1 is subject to
The compression force signal for stating coil 1 is converted to the first electric signal, and by first electric signal transmission to the processor 11, by institute
First electric signal of processor 11 pairs is stated to be processed, analyzed and shown.First piezoelectric transducer 81 can be realized in real time
Thrust and axial electric power suffered by monitoring Transformer Winding, and stress feelings of the analogue transformer winding when loosening
The purpose of condition.
Second piezoelectric transducer 82 is used to monitor the convergent force of the coil 1.The principle of piezoelectric transducer is mainly
Piezo-electric effect, it is that pressure signal to be measured is converted into electric signal using electrical equipment and other machineries, then carries out correlation
The fine measuring instrument of work is measured, has the advantages that small volume, lightweight, sensitivity are high and signal to noise ratio is big.
When transformer is short-circuited, Transformer Winding can produce deformation on radial, and now Transformer Winding can be in spoke
Upwards to contract, so as to extrude second piezoelectric transducer 82, second piezoelectric transducer 82 is by the receipts of the coil 1
Contracting force signal is converted to the second electric signal, and by second electric signal transmission to the processor 11, by the processor 11
Second electric signal is processed, analyzed and shown.Second piezoelectric transducer 82 can carry out short circuit in transformer
During experiment, the stressing conditions of Transformer Winding are monitored.
The vibrating sensor 9 can monitor transformer in reality located at the outer surface of the coil 1, the vibrating sensor
The vibration produced in the operation of border.The vibrating sensor can be divided into：Displacement transducer, velocity sensor and acceleration transducer.
Wherein, for by it is uneven, misalign, loosen or low-frequency vibration that the phenomenon such as oil whip causes, from displacement transducer or
Velocity sensor is monitored to vibration, the data that can be stablized；And for medium, high frequency vibration, then passed using acceleration
Sensor.The vibrating sensor 9 can be needed according to actual tests or oscillatory type is chosen, and can select one of which or many
Kind.
Preferably, the vibrating sensor 9 is displacement transducer.Institute's displacement sensors effect is component to be measured
Displacement is converted to electricity, can by real-time monitoring coil it is radial on displacement indirectly reflect stress, for ease of being shaken to winding
Dynamic to carry out real-time monitoring, institute's displacement sensors are digital displacement transducer.
Transformer body inevitably produces vibration, when the coil 1 vibrates, the coil in actual motion
1 can produce deformation and displacement, and the displacement signal of the coil 1 is converted to the 3rd electric signal by institute's displacement sensors 9, and by institute
State the 3rd electric signal transmission to the processor 11, processed by 11 pairs of the 3rd electric signals of the processor, analyze and
Display.
Preferably, first piezoelectric transducer 81, second piezoelectric transducer 82 are fiber optic conduction formula piezoelectricity biography
Sensor.The fiber optic conduction formula piezoelectric transducer is that pressure signal is converted into optical signal to be transmitted, then optical signal is converted
Be electric signal, and pressure monitoring carried out by the processor 11, with capacity it is big, loss is low, dielectric strength is high and anti-strong
The advantages of electromagnetic interference capability is strong.Can effectively be cut off by the way of Optical Fiber Transmission measuring pressure electromagnetic interference be coupled to measuring pressure lead to
The approach on road, it is to avoid the influence that various impulse disturbances are brought to pressure measxurement, thus improve pressure measxurement anti-interference and
Certainty of measurement.
Preferably, the vibrating sensor 9 is fiber optic conduction formula vibrating sensor.The fiber optic conduction formula vibrating sensor
It is that vibration signal is converted into optical signal to be transmitted, then converts optical signal into electric signal, and is carried out by the processor 11
Vibration monitoring, has the advantages that capacity is big, loss is low, dielectric strength is high and anti-strong electromagnetic ability is strong.The optical fiber
Conduction-type vibrating sensor can be used to measure displacement signal, rate signal and acceleration signal, can improve the precision of vibration measurement
And reliability.
Preferably, the adjustable testing transformer of winding stress also includes optical-electrical converter 10.Optical-electrical converter is one
The Ethernet transmission media converting unit for being interchangeable the optical signal of short-range twisted pair telecommunications number and long range is planted, mainly
It is to convert optical signals into electric signal using photoelectric effect, is easy to first piezoelectric transducer 81 of the processor 11 pairs, institute
The monitoring signals for stating the second piezoelectric transducer 82 and the vibrating sensor 9 are processed.
First piezoelectric transducer 81 is connected with the input of the optical-electrical converter 10 by optical fiber, the photoelectricity
The output end of converter 10 is connected with the processor 11 by cable.When the thrust suffered by the coil 1 changes, institute
State the corresponding optical parameter of the first piezoelectric transducer 81 to change, and then produce first light corresponding with thrust change information
Signal；First optical signal is transmitted through the fiber to the optical-electrical converter 10；The optical-electrical converter 10 is by described first
Optical signal is converted into the first electric signal；First electric signal passes through cable transmission to the processor 11, and by the treatment
First electric signal of device 11 pairs is processed, analyzed and shown, so as to realize thrust suffered by real-time monitoring Transformer Winding
Purpose.Wherein, the optical parameter can be any one in light intensity, wavelength, phase and polarization state.
Second piezoelectric transducer 82 is connected with the input of the optical-electrical converter 10 by optical fiber, the photoelectricity
The output end of converter 10 is connected with the processor 11 by cable.When the convergent force of the coil 1 changes, described the
The corresponding optical parameter of two piezoelectric transducer 82 changes, and then produces the second light letter corresponding with convergent force change information
Number；Second optical signal is transmitted through the fiber to the optical-electrical converter 10；The optical-electrical converter 10 is by second light
Signal is converted into the second electric signal；Second electric signal passes through cable transmission to the processor 11, and by the processor
11 pairs of second electric signals are processed, analyzed and shown, so as to realize the purpose of real-time monitoring Transformer Winding convergent force.
Wherein, the optical parameter can be any one in light intensity, wavelength, phase and polarization state.
The vibrating sensor 9 is connected with the input of the optical-electrical converter 10 by optical fiber, the opto-electronic conversion
The output end of device 10 is connected with the processor 11 by cable.When the coil 1 vibrates, located at the coil 1
The corresponding optical parameter of the vibrating sensor 9 of outer surface changes, and then produces threeth light corresponding with vibration information
Signal；3rd optical signal is transmitted through the fiber to the optical-electrical converter 10；The optical-electrical converter 10 is by the described 3rd
Optical signal is converted into the 3rd electric signal；3rd electric signal passes through cable transmission to the processor 11, and by the treatment
The 3rd electric signal of device 11 pairs is processed, analyzed and shown, so as to realize the purpose of real-time monitoring transformer winding vibration.
Wherein, the optical parameter can be any one in light intensity, wavelength, phase and polarization state.
It should be noted that first piezoelectric transducer 81, second piezoelectric transducer 82 and the vibrating sensing
Device 9 can be serially connected with same light path by multiplexing technology, i.e., by multiplexing technology by first optical signal, second light
Signal and the 3rd optical signal set synthesis composite signal, to realize transmission of the multiple signals in Same Physical channel, are entering
Before row opto-electronic conversion, the composite signal is separated into by each independent signal by de-multiplexing technique again, then by each independence
Signal transmission is to the optical-electrical converter 10；First piezoelectric transducer 81, second piezoelectric transducer 82 and described shake
Dynamic sensor 9 can also be by three independent optical paths, respectively to first optical signal, second optical signal and the described 3rd
Optical signal is transmitted.The specific transmission means of first optical signal, second optical signal and the 3rd optical signal can
Selected according to actual needs.
Preferably, the part 72 that suppresses is provided with groove 721, and one end of the screw rod 73 is located in the groove 721, this
When, the screw rod 73, for face contacts, can improve the transmission efficiency of thrust with the part 72 that suppresses, and make the hold-down gear 7
The thrust suffered by the coil 1 can be better controled over, and the structure of the hold-down gear 7 is more solid and reliable, is conducive to peace
Dress, is capable of achieving to the flexible modulation of Transformer Winding thrust, and operation is simple and reliable, can analogue transformer winding in actual motion
The loosening defect of middle generation.
A kind of adjustable testing transformer of winding stress provided from above technical scheme, the present invention, including：Transformation
Device main body, hold-down gear 7, piezoelectric transducer group 8, vibrating sensor 9 and processor 11；The piezoelectric transducer group 8 includes the
One piezoelectric transducer 81 and the second piezoelectric transducer 82.It is overall and local by the powerstat winding of the hold-down gear 7
Thrust；The axially electricity that winding is subject to when first piezoelectric transducer 81 is used for thrust and the experiment of real-time monitoring coil
Power；Second piezoelectric transducer 82 is used for the radial convergent force of real-time monitoring coil；The vibrating sensor can be monitored
The vibration that transformer is produced in actual motion.Simple structure of the present invention, can flexible modulation winding stress, and structure safely may be used
Lean on, can truly analogue transformer winding loosen, the stressing conditions in failed shorted and actual motion during transformer winding vibration, can
The fields such as design ＆ check, fault simulation, test monitoring and scientific research for transformer.
Those skilled in the art considering specification and after putting into practice invention disclosed herein, will readily occur to it is of the invention its
Its embodiment.The application is intended to any modification of the invention, purposes or adaptations, these modifications, purposes or
Person's adaptations follow general principle of the invention and including undocumented common knowledge in the art of the invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the invention is not limited in the precision architecture being described above and be shown in the drawings, and
And can without departing from the scope carry out various modifications and changes.The scope of the present invention is only limited by appended claim.
Claims (7)
1. a kind of adjustable testing transformer of winding stress, including transformer body, the transformer body includes：Fuel tank (5),
Located at the upper of the internal iron core (2) of the fuel tank (5), the coil (1) being sheathed on outside the iron core (2) and the iron core (2)
Lower clamping piece (4) that the upper clamping piece (3) that iron yoke is connected is connected with the lower yoke of the iron core (2) and located at the fuel tank (5)
Outgoing line device (6) on outer wall, it is characterised in that be additionally provided with hold-down gear (7), piezoelectric transducer group inside the fuel tank (5)
And vibrating sensor (9) (8)；The testing transformer is also included positioned at the outside processor (11) of the fuel tank (5)；
The piezoelectric transducer group (8) includes：First piezoelectric transducer (81) and the second piezoelectric transducer (82)；
The coil (1) is connected with the hold-down gear (7) by first piezoelectric transducer (81)；
Second piezoelectric transducer (82) is in the space between the coil (1) and the iron core (2)；
Outer surface of the vibrating sensor (9) positioned at the coil (1)；
First piezoelectric transducer (81), second piezoelectric transducer (82) and the vibrating sensor (9) respectively with institute
Processor (11) is stated to be connected.
2. the adjustable testing transformer of winding stress according to claim 1, it is characterised in that the hold-down gear (7)
Including：Cushion block (71), suppress part (72), screw rod (73) and nut (74)；
The part (72) that suppresses is connected with first piezoelectric transducer (81) by the cushion block (71)；
The screw rod (73) is through the screw (31) set by the upper clamping piece (3)；
One end of the screw rod (73) is connected with the part (72) that suppresses；
The other end of the screw rod (73) is located at the outside of the fuel tank (5), and is fastenedly connected with the nut (74).
3. the adjustable testing transformer of winding stress according to claim 2, it is characterised in that first piezoelectric sensing
Device (81) and second piezoelectric transducer (82) are fiber optic conduction formula piezoelectric transducer.
4. the adjustable testing transformer of winding stress according to claim 3, it is characterised in that the vibrating sensor
(9) it is fiber optic conduction formula vibrating sensor.
5. the adjustable testing transformer of winding stress according to claim 4, it is characterised in that also including optical-electrical converter
(10)；
First piezoelectric transducer (81) is connected with the input of the optical-electrical converter (10) by optical fiber；
Second piezoelectric transducer (82) is connected with the input of the optical-electrical converter (10) by optical fiber；
The vibrating sensor (9) is connected with the input of the optical-electrical converter (10) by optical fiber；
The output end of the optical-electrical converter (10) is connected with the processor (11) by cable.
6. the adjustable testing transformer of winding stress according to claim 4, it is characterised in that the vibrating sensor
(9) it is displacement transducer.
7. the adjustable testing transformer of winding stress according to claim 2, it is characterised in that described to suppress on part (72)
Groove (721) is provided with, one end of the screw rod (73) is located in the groove (721).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611059204.8A CN106768509A (en) | 2016-11-22 | 2016-11-22 | A kind of adjustable testing transformer of winding stress |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611059204.8A CN106768509A (en) | 2016-11-22 | 2016-11-22 | A kind of adjustable testing transformer of winding stress |
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| CN106768509A true CN106768509A (en) | 2017-05-31 |
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| CN201611059204.8A Pending CN106768509A (en) | 2016-11-22 | 2016-11-22 | A kind of adjustable testing transformer of winding stress |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108181040A (en) * | 2018-01-16 | 2018-06-19 | 西安交通大学 | A kind of transformer winding compresses force measuring device |
| CN108287048A (en) * | 2018-01-16 | 2018-07-17 | 西安交通大学 | It is a kind of to study test method of the transformer pressing force to winding vibration effect |
| CN110926673A (en) * | 2019-12-02 | 2020-03-27 | 沈阳变压器研究院股份有限公司 | Device for measuring short circuit force of power transformer |
| CN112630580A (en) * | 2021-01-11 | 2021-04-09 | 西南交通大学 | Transformer winding short-circuit fault simulation device |
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