CN207281255U - Generator carbon brush on-line monitoring system - Google Patents
Generator carbon brush on-line monitoring system Download PDFInfo
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- CN207281255U CN207281255U CN201721416463.1U CN201721416463U CN207281255U CN 207281255 U CN207281255 U CN 207281255U CN 201721416463 U CN201721416463 U CN 201721416463U CN 207281255 U CN207281255 U CN 207281255U
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- carbon brush
- monitoring system
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- brush
- temperature
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Abstract
The utility model discloses a kind of generator carbon brush on-line monitoring system, including sequentially connected detection module, communication concentrator and monitoring host computer；Detection module includes being used to detect the current detecting unit of carbon brush electric current, the temperature detecting unit for detecting carbon brush temperature and the carbon brush abrasion detection unit for detecting carbon brush abrasion situation.The application in real time monitors the temperature of carbon brush, electric current and wear coefficient by detection module in real time, and remote online handles the data that detection module collects, give warning in advance for failures such as carbon brush hot-spot, excessive wear, generator amature electric discharge and short circuits；And, the application realizes the abrasion detection of carbon brush using the principle of capacitor, the degree of wear of the capacitance size change detection carbon brush of its capacitor model formed according to two pieces of media between metallic plate and metallic plate, at the same time by setting differential amplifier circuit to eliminate the error brought in actual operation by environmental factor, to ensure the accuracy of monitoring data.
Description
Technical field
It the utility model is related to a kind of generator carbon brush on-line monitoring system.
Background technology
The carbon brush quantity of excitation in generator system is more, and in continued wear and high-temperature work environment, for a long time
The electric parameter of the carbon brush used can have greatly changed, and then cause carbon brush to produce larger temperature rise with slip ring contact surface, and
And each carbon brush Parameters variation of same generator is inconsistent, it will causes load current is unbalance to cause collector ring heating or even rise
Fire, hang-up cause heavy losses.The parameter of each carbon brush is also slightly discrepant, and the rate of wear of getting off for a long time is also to differ
Sample, carbon brush quantity is more, and the letter such as replacing construction point of carbon brush is replaced in the acquisition that way to manage shortcoming leads to not promptly and accurately
Breath.
The department of operation at present understands the electric and temperature parameter information of carbon brush by way of manual inspection, due to manually inspection
The operation of survey is time-consuming longer and has certain risk, and each teams and groups can only detect once, and running carbon brush load current
Very greatly quickly, detection data randomness several times daily is excessive, and the sampling time is inconsistent, causes measurement parameter without reference for change
Meaning, so also without judgement value；Although carbon brush, which can take out, checks carbon brush length, since carbon brush quantity is more,
Heavy workload is checked one by one, the normal work of equipment can slightly be influenced by taking out carbon brush for a long time, so the method for manual inspection
To carbon brush health state evaluation poor effect.In addition, the insulating layer of very thin rotor coil turn-to-turn, due to layer insulation aging,
Short circuit easily easily occurs for turn-to-turn under the action of rotor rotary centrifugal force；Moreover, when generator amature winding early period of origination is put
When electric, operator on duty can not obtain these information；With the deterioration of turn-to-turn insulation, it may occur that short circuit so that rotor current is rapid
Increase, causes winding temperature to raise, and rotor coil and iron core can be damaged when serious, triggers accident；Meanwhile rotor coil winding is short
After road, since magnetic force is uneven, aggravate generator set vibration, the safe operation of power plant is greatly threatened.
Utility model content
The purpose of this utility model is to provide a kind of generator carbon brush on-line monitoring system, to solve existing carbon brush detection work
Work amount is big, detection is inaccurate and easy the problem of triggering accident.
In order to solve the above technical problems, the utility model provides a kind of generator carbon brush on-line monitoring system, including successively
Detection module, communication concentrator and the monitoring host computer of connection；The detection module includes being used for the carbon for detecting carbon brush abrasion situation
Brush wear detection unit.
The carbon brush abrasion detection unit includes standard capacitor, analog capacitor, is connected with the standard capacitor
First capacitance measuring instrument, the second capacitance measuring instrument being connected with the analog capacitor and respectively with first capacitance measurement
Instrument and the processor of the second capacitance measuring instrument connection；The analog capacitor includes two the first metallic plates, two described first
Metallic plate is fixed on the homonymy side wall of the brush-box for installing carbon brush, two first metallic plates and the carbon brush side by side
The first insulating layer is equipped between the side wall of box；The standard capacitor includes two second gold medals identical with first metallic plate
Belong to plate, two second metallic plates are fixed on the lateral wall of the brush-box side by side, two second metallic plates and institute
State and be equipped with the second insulating layer between the lateral wall of brush-box.
Further, it is equipped with differential amplifier circuit between second capacitance measuring instrument and processor.
Further, which further includes the current detecting unit for detecting carbon brush electric current.
Further, the electric current electrical measurement unit includes the closed loop Hall current for being arranged on the electric current end of incoming cables of the carbon brush
Sensor.
Further, which further includes the temperature detecting unit for detecting carbon brush temperature.
Further, the temperature detecting unit includes temperature touch sensor, the temperature touch sensor
Temp-sensing element extends the end thereof contacts of the brush-box with carbon brush.
Further, the temp-sensing element is platinum resistance thermometer sensor,.
Further, detection module is connected with communication concentrator by wireless transmission unit.
Further, connected between the communication concentrator and monitoring host computer by optical fiber.
The beneficial effects of the utility model are：The application utilizes the principle of capacitor, according to two blocks of opposite disposed metals
The degree of wear of the size variation reaction carbon brush of the capacitance of medium composition capacitor model between plate and metallic plate, the detection system
Unite simple in structure, be easily installed, and occupy little space.
Brief description of the drawings
Attached drawing described herein is used for providing further understanding of the present application, the part of the application is formed, at this
The same or similar part, the schematic description and description of the application are represented using identical reference number in a little attached drawings
For explaining the application, the improper restriction to the application is not formed.In the accompanying drawings：
Fig. 1 is the schematic diagram of the utility model one embodiment；
Fig. 2 is the schematic diagram of the carbon brush abrasion detection unit of the utility model one embodiment；
Fig. 3 is the metallic plate of the utility model one embodiment and the structure diagram of temp-sensing element installation site；
Fig. 4 is the side view of the carbon brush abrasion detection unit installation site of the utility model one embodiment；
Fig. 5 is the schematic diagram of the closed-loop Hall current sensor of the utility model one embodiment.
Wherein：1st, brush-box；2nd, carbon brush；3rd, elastic component；5th, temp-sensing element；A, analog capacitor；A1, the first insulating layer；
B, standard capacitor；B1, the second insulating layer.
Embodiment
Carbon brush on-line monitoring system as shown in Figure 1, including sequentially connected detection module, communication concentrator and monitoring master
Machine.After the data such as electric current that detection module collects sensor, temperature carry out processing early period, passed by wireless transport module
Give cabinet in Communication Set.The equipment of cabinet can receive multiple front end monitoring hosts and send related data in Communication Set, then pass through
Optical fiber is sent to after these data are re-grouped package in the monitoring host computer cabinet of monitoring room, and is stored in the database in cabinet
In server, the Data Analysis Services equipment in monitoring host computer cabinet completes calculating, analysis and processing (the wherein data analysis of data
Calculating, analysis and the treatment technology of the data of processing equipment are the prior art, and details are not described herein again), finally can be by man-machine
Interaction controller checks the statistical informations such as real time data, curve/failure, alarm, and historical data, curve etc. can also be looked into
Ask.
The detection module includes being used to detect the current detecting unit of 2 electric current of carbon brush, the temperature for detecting 2 temperature of carbon brush
Spend detection unit and the carbon brush abrasion detection unit for detecting 2 wear condition of carbon brush.Separately below to each detection unit
It is described in detail：
As shown in Fig. 2, the carbon brush abrasion detection unit includes standard capacitor B, analog capacitor A and the standard
First capacitance measuring instrument of capacitor connection, the second capacitance measuring instrument for being connected with the analog capacitor and respectively with it is described
First capacitance measuring instrument and the processor (such as microprocessor) of the second capacitance measuring instrument connection；The analog capacitor A includes two
A first metallic plate, two first metallic plates are fixed on the homonymy side wall of the brush-box for installing carbon brush side by side, and two
The first insulating layer A1 is equipped between the side wall of a first metallic plate and the brush-box 1；The standard capacitor B includes two
A second metallic plate identical with first metallic plate, and the spacing between two the second metallic plates and two the first metallic plates
Between spacing it is equal, two second metallic plates are fixed on the lateral wall of the brush-box 1 side by side, two described second
The second insulating layer B1 is equipped between the lateral wall of metallic plate and the brush-box 1.
The abrasion detection of above-mentioned abrasion detection unit is achieved in that what is realized using the principle of capacitor, with opposite disposed
Two piece of first metallic plate and the first metallic plate between medium (i.e. carbon brush 2 and adjacent air dielectric) composition capacitor model.
Because carbon brush 2 is good conducting medium, its length changes after carbon brush 2 is worn, and the original portion of carbon brush 2 becomes
Air dielectric, original good conducting medium carbon brush 2 becomes the air dielectric of insulation, the size of its capacitance for capacitance
It will change, the specific changing value of analog capacitor is detected by the second capacitance measuring instrument, and by the changing value and first
The standard capacitor-value that capacitance measuring instrument detects compares to obtain capacitance difference, and the mill of carbon brush 2 can be calculated according to capacitance difference
Damage degree.Wherein, ratio is made to the standard capacitor-value of the specific changing value and standard capacitor of analog capacitor using microprocessor
Relatively draw capacitance difference, and realization that technology used by the degree of wear of carbon brush 2 uses is calculated according to capacitance difference by routine
Technology, details are not described herein again.
But situation can be much more complex in actual operation, the temperature of surrounding can change, air dielectric parameter meeting
Change (there are a small amount of carbon dust in air, and the amount of carbon dust may change), and other environmental factors all can
Influence the accuracy of monitoring result.Therefore application itself between second capacitance measuring instrument and processor equipped with difference by putting
Big circuit, differential amplifier circuit is a kind of mode that can largely eliminate such environmental effects, here using difference
Amplifying circuit principle just can solve this problem.
The current detecting unit includes front end closed-loop Hall current sensor, and (as shown in Figure 5) and rear end dry cell, divide
Analyse computing module, wireless transport module etc..Closed-loop Hall current sensor is directly clamped among the electric current of carbon brush 2 into linear distance connector
5cm or so places, insert space is larger, conveniently laying and fixed.The module of closed-loop Hall current sensor lead to rear end is made
Semi-circular is fixed two ways by gluing and screw and is fixed.
The specific work process of closed-loop Hall current sensor is：When major loop have an electric current by when, produced on conducting wire
Raw magnetic field is assembled and sensed on hall device H by magnet ring, and caused signal output is used for driving power pipe and leads it
It is logical, so as to obtain a compensation electric current IS.This electric current produces magnetic field by multicircuit winding again, which produces with tested electric current
Magnetic field contrast, thus compensate for original magnetic field, be gradually reduced the output of hall device H.When with IPWith number of turn phase
When magnetic field caused by multiplying is equal, ISIt is not further added by, hall device H at this moment plays the role of indicating Zero flux, at this time can be with
Pass through ISTo test IP.Work as IPDuring change, balance is destroyed, and hall device H has signal output, that is, repeats the above process again
Reach balance.Any change of tested electric current can all destroy this balance.Once magnetic field disequilibrium, hall device H just has letter
Number output.After power amplification, just there is corresponding electric current to flow through secondary windings to be compensated to unbalance magnetic field immediately.From magnetic
Field is unbalance to balancing again, and less than 1us on required time theory, this is the process of a dynamic equilibrium.Therefore, from macroscopically
See, secondary compensation electric current number of ampere turns is all equal with the number of ampere turns of primary tested electric current at any time.
Rated direct current during 2 steady operation of carbon brush can have both been measured using closed-loop Hall current sensor, can also
Measure the irregular electric current of carbon brush 2 and collector ring contact point；Both smaller current during 2 standby operation of carbon brush can have been measured, also might be used
With detect some carbon brush 2 go wrong after larger current；Low speed sampling when can both meet rated current detection will
Ask, abnormal work electric current can also be obtained with high-speed sampling；It is fully full at the same time it can also meet the requirement of non-cpntact measurement
The regulation of sufficient safety standard.
The temperature detecting unit includes temperature touch sensor, and the temp-sensing element 5 of temperature touch sensor is platinum
Thermal resistance.Temperature touch sensor is divided into two parts, and front end is contact platinum thermal resistance sensor, rear end is dry cell,
D/A converter module and wireless transport module etc..Carbon brush 2 can expose 3~5mm in carbon brush brush holder front end in the actual production process
Contacted with slip ring, the front end of temperature touch sensor touches the close carbon brush brush holder one end for 3~5mm that carbon brush 2 exposes.Afterwards
The original paper at end is installed on a square circuit board, and places a matched square etui, and process is gluing, design machinery is solid
Fixed, screw is fixed three kinds of modes and is fixed, to prevent its parts from dropping in 2 storehouse of carbon brush and then trigger accident.
According to the working status of carbon brush 2, the temperature touch sensor in this programme, main temperature-measuring range room temperature to 120
DEG C, the impact of higher temperature can be resistant to, sampling precision index request need not be very high, and general ± 3 DEG C can meet, but to surveying
The time stability of temperature is more demanding.Since platinum (Pt) thermal resistance can use below 600 DEG C as temperature reference, its precision
And high stability, so using platinum resistance thermometer sensor, as temperature-sensing element (device) in the design.
In wireless temperature measurement mode, in addition to selecting reliable, quick temperature touch sensor, it is necessary to consider two other
The problem of aspect：First, the communication of wireless transport module and electric property；Second, high-temperature battery used in wireless temperature measure module and
Its service life.
According to onsite application environmental restrictions, the wireless transport module of this programme selection should possess preferable antijamming capability,
Therefore the general digital phase moudlation modulation system using similar satellite communication：Can be according to on-site wireless communication condition, can be in BPSK, O-
Switch operating under the modulating modes such as QPSK, speed is 20Kbits/sec during low speed transmissions, up to 250Kbits/ during high-speed transfer
sec。
Wireless temperature measurement uses battery powered, so needing to consider power saving.By calculating and comparative analysis, in the design, adopt
With Israel's Tadiran high-temperature batteries series：TLH series, its characteristic are substantially better than domestic battery, its battery capacity is big, technology
Content is high, good airproof performance, service life length, and reliability is high.According to cell frequency requirement is replaced, TLH- can be selected in annual replace
2450, every 3 years replace select TLH-4902, generating set per after a while will planned shutdown or scheduled overhaul, can
To ensure that battery has an opportunity to replace in time.
Finally illustrate, above example is merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, it will be understood by those of ordinary skill in the art that, can be to this
The technical solution technical scheme is modified or replaced equivalently of utility model, without departing from the objective and model of technical solutions of the utility model
Enclose, it should all cover among the right of the utility model.
Claims (10)
- A kind of 1. generator carbon brush on-line monitoring system, it is characterised in that including sequentially connected detection module, the detection mould Block includes being used for the carbon brush abrasion detection unit for detecting carbon brush abrasion situation；The carbon brush abrasion detection unit include standard capacitor, analog capacitor, be connected with the standard capacitor first Capacitance measuring instrument, the second capacitance measuring instrument being connected with the analog capacitor and respectively with first capacitance measuring instrument and The processor of second capacitance measuring instrument connection；The analog capacitor includes two the first metallic plates, and two first metallic plates are fixed on for installing carbon brush side by side Brush-box homonymy side wall on, the first insulating layer is equipped between two first metallic plates and the side wall of the brush-box；The standard capacitor includes two second metallic plates identical with first metallic plate, two second metallic plates It is fixed on the lateral wall of the brush-box, is equipped between two second metallic plates and the lateral wall of the brush-box side by side Second insulating layer.
- 2. generator carbon brush on-line monitoring system according to claim 1, it is characterised in that second capacitance measuring instrument with Differential amplifier circuit is equipped between processor.
- 3. generator carbon brush on-line monitoring system according to claim 1 or claim 2, it is characterised in that the system, which further includes, to be used for Detect the current detecting unit of carbon brush electric current.
- 4. generator carbon brush on-line monitoring system according to claim 3, it is characterised in that the electric current electrical measurement unit includes It is arranged on the closed-loop Hall current sensor of the electric current end of incoming cables of the carbon brush.
- 5. generator carbon brush on-line monitoring system according to claim 1 or claim 2, it is characterised in that the system, which further includes, to be used for Detect the temperature detecting unit of carbon brush temperature.
- 6. generator carbon brush on-line monitoring system according to claim 5, it is characterised in that the temperature detecting unit includes Temperature touch sensor, temp-sensing element and the carbon brush of the temperature touch sensor extend a termination of the brush-box Touch.
- 7. generator carbon brush on-line monitoring system according to claim 6, it is characterised in that the temp-sensing element is platinum thermoelectricity Resistance.
- 8. generator carbon brush on-line monitoring system according to claim 1, it is characterised in that the system further includes and the inspection Survey the communication concentrator of module connection, and the monitoring host computer being connected with the communication concentrator.
- 9. generator carbon brush on-line monitoring system according to claim 8, it is characterised in that the detection module and Communication Set Middle device is connected by wireless transmission unit.
- 10. generator carbon brush on-line monitoring system according to claim 9, it is characterised in that the communication concentrator and prison Connected between control host by optical fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721416463.1U CN207281255U (en) | 2017-10-30 | 2017-10-30 | Generator carbon brush on-line monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721416463.1U CN207281255U (en) | 2017-10-30 | 2017-10-30 | Generator carbon brush on-line monitoring system |
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| Publication Number | Publication Date |
|---|---|
| CN207281255U true CN207281255U (en) | 2018-04-27 |
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ID=61979039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721416463.1U Active CN207281255U (en) | 2017-10-30 | 2017-10-30 | Generator carbon brush on-line monitoring system |
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| CN (1) | CN207281255U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879273A (en) * | 2018-08-14 | 2018-11-23 | 张宏伟 | Thermoelectric generator carbon brush temperature current and abrasion on-line computing model |
| CN110542856A (en) * | 2019-08-28 | 2019-12-06 | 福建福清核电有限公司 | offline testing system and method for generator rotor grounding protection carbon brush device |
| CN111307202A (en) * | 2019-11-19 | 2020-06-19 | 辽宁红德电碳制品有限公司 | Brush material performance detection device |
-
2017
- 2017-10-30 CN CN201721416463.1U patent/CN207281255U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879273A (en) * | 2018-08-14 | 2018-11-23 | 张宏伟 | Thermoelectric generator carbon brush temperature current and abrasion on-line computing model |
| CN110542856A (en) * | 2019-08-28 | 2019-12-06 | 福建福清核电有限公司 | offline testing system and method for generator rotor grounding protection carbon brush device |
| CN110542856B (en) * | 2019-08-28 | 2021-06-22 | 福建福清核电有限公司 | Offline testing system and method for generator rotor grounding protection carbon brush device |
| CN111307202A (en) * | 2019-11-19 | 2020-06-19 | 辽宁红德电碳制品有限公司 | Brush material performance detection device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230704 Address after: 400041 Building 1, No. 21, Fengsheng Road, Jinfeng Town, High tech Zone, Jiulongpo District, Chongqing Patentee after: Chongqing Fubosheng Technology Co.,Ltd. Address before: 401121 Middle and rear 3/F, Building B, Mercury Science and Technology Building, High tech Park, New North Zone, Chongqing Patentee before: Wang Yu Patentee before: Liao Jinbo |