CN217739455U - Shaft current monitor calibration equipment - Google Patents
Shaft current monitor calibration equipment Download PDFInfo
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- CN217739455U CN217739455U CN202221582411.2U CN202221582411U CN217739455U CN 217739455 U CN217739455 U CN 217739455U CN 202221582411 U CN202221582411 U CN 202221582411U CN 217739455 U CN217739455 U CN 217739455U
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- Prior art keywords
- current monitor
- wire
- axle
- shaft current
- current sensor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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Abstract
The utility model belongs to the technical field of the instrument school is examined, especially, be an axle current monitor calibration equipment, including the hydraulic turbine main shaft, the outside of hydraulic turbine main shaft is provided with axle current sensor, one side of axle current sensor is provided with experimental wire, the one end of experimental wire is connected with relay protection ware, relay protection ware's input is provided with second power supply unit, axle current sensor opposite side is connected with connecting wire. The utility model discloses a set up axle current sensor, experimental wire, display device, insulation resistance tester, connecting wire and computer monitored control system, the calibration effect of counter shaft current monitor can be realized to this calibration equipment, calibration equipment's simple structure, be convenient for operation and dismantlement, the calibration accuracy of counter shaft current monitor can also be guaranteed, the monitoring accuracy of counter shaft current of axle current monitor is improved, the operator directly can carry out the record to the calibration data through observing display device simultaneously, excellent in use effect.
Description
Technical Field
The utility model relates to an instrument school is examined technical field, specifically is a shaft current monitor calibration equipment.
Background
The rotating machinery will also produce static electricity in the course of high-speed rotation, in order to protect charged rotor and bearing, the turbine shaft is grounded through slip ring or brush on the driving side, the hydraulic turbine generator is grounded through the turbine main shaft and water flow. If the bearing seat on one side of the rotor is grounded, the loop impedance formed by the large shaft becomes very small, the shaft voltage is mainly applied to the oil film of the bearing, once the oil film is damaged, strong shaft current can be generated, and the bearing is seriously damaged. Monitoring the shaft voltage and the shaft current is an effective means for evaluating the insulation condition of the bearing of the generator and preventing accidents. The traditional shaft current transformer is a special current transformer with an iron core, and in order to realize accurate monitoring and signal remote transmission, the current transformer is required to have larger output impedance, and a monitor needs to perform calibration and check on the current transformer before use to ensure the accuracy of monitoring data.
The prior art has the following problems:
most axle current monitors monitor the axle current without passing through the check before using, easily cause monitoring data inaccurate enough, influence the result of use of monitor, still can cause mechanical equipment's improper operation simultaneously, influence mechanical equipment's operating efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model provides a not enough to prior art, the utility model provides an axle current monitor calibration equipment has solved the axle current monitor that exists today and has monitored with regard to the counter shaft current not passing through the check-up before using, easily causes monitoring data not accurate enough and causes mechanical equipment's abnormal operation, influences mechanical equipment operating efficiency's problem.
In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides an axle current monitor calibration equipment, includes the hydraulic turbine main shaft, the outside of hydraulic turbine main shaft is provided with axle current sensor, one side of axle current sensor is provided with experimental wire, the one end of experimental wire is connected with relay protector, relay protector's input is provided with second power supply unit, axle current sensor opposite side is connected with connecting wire, connecting wire's upper end is provided with the insulation resistance tester, connecting wire's one end is connected with axle current monitor, the upper end of axle current monitor is provided with display device, the input of axle current monitor is provided with first power supply unit.
As a preferred technical scheme of the utility model, there is electric connection in experimental wire through relay protection ware and second power supply unit, the even winding of experimental wire is in one side of axle current sensor, the output of experimental wire is connected with relay protection ware's input, the defeated input of experimental wire is connected with relay protection ware's output.
As an optimal technical scheme of the utility model, the output of axle current monitor is provided with computer monitoring system, there is electric connection in axle current sensor through connecting wire and axle current monitor.
As an optimal technical scheme of the utility model, the insulation resistance tester is connected through the connecting wire with axle current monitor and axle current sensor's shell.
As a preferred technical solution of the present invention, the first power supply device has an electrical connection with the shaft current monitor through an electrical wire, and the display device has an electrical connection with the shaft current monitor through an electrical wire.
Compared with the prior art, the utility model provides an axle current monitor calibration equipment possesses following beneficial effect:
1. this axle current monitor calibration equipment is through setting up axle current sensor and test wire, before the calibration of counter shaft current monitor is used, the operator will test the wire and evenly twine in one side of axle current sensor, can realize the check-up effect of counter shaft current monitor, calibration equipment's simple structure, be convenient for operation and dismantlement, the calibration accuracy of counter shaft current monitor can also be guaranteed, the monitoring accuracy of counter shaft current of axle current monitor is improved, simultaneously can also guarantee the stationarity of mechanical equipment at high-speed operation in-process, mechanical equipment's operating efficiency has been improved.
2. This axle current monitor calibration equipment is through setting up display device, insulation resistance tester, connecting wire and computer monitoring system, and this calibration equipment can carry out certain guard action to self at counter axle current monitor calibration in-process, avoids axle current unstability to cause the damage to the device, and the operator directly can carry out the record to the check-up data through observing display device simultaneously, excellent in use effect.
Drawings
FIG. 1 is a schematic view of the shaft current monitor calibration device of the present invention;
FIG. 2 is a schematic view of a connection structure of an insulation resistance tester and a shaft current sensor housing;
FIG. 3 is a schematic view of an electrical connection structure of the verification structure.
In the figure: 1. a water turbine main shaft; 2. a shaft current sensor; 3. a first power supply; 4. a shaft current monitor; 5. a display device; 6. an insulation resistance tester; 7. testing a lead; 8. a relay protector; 9. a second power supply; 10. a computer monitoring system; 11. and connecting the lead.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-3, in this embodiment: the utility model provides an axle current monitor calibration equipment, including hydraulic turbine main shaft 1, the outside of hydraulic turbine main shaft 1 is provided with axle current sensor 2, one side of axle current sensor 2 is provided with experimental wire 7, the one end of experimental wire 7 is connected with relay protection ware 8, relay protection ware 8's input is provided with second power supply unit 9, axle current sensor 2 opposite side is connected with connecting wire 11, connecting wire 11's upper end is provided with insulation resistance tester 6, connecting wire 11's one end is connected with axle current monitor 4, axle current monitor 4's upper end is provided with display device 5, axle current monitor 4's input is provided with first power supply unit 3.
In the embodiment, the test wire 7 is electrically connected with the second power supply device 9 through the relay protector 8, the test wire 7 is uniformly wound on one side of the shaft current sensor 2, the output end of the test wire 7 is connected with the input end of the relay protector 8, and the input and output ends of the test wire 7 are connected with the output end of the relay protector 8, so that power is supplied for use, and the normal operation of the device is ensured; the output end of the shaft current monitor 4 is provided with a computer monitoring system 10, and the shaft current sensor 2 is electrically connected with the shaft current monitor 4 through a connecting wire 11, so that the structure is reasonable; the insulation resistance tester 6 is connected with the connecting wire 11 of the shaft current monitor 4 and the shell of the shaft current sensor 2, so that the insulation resistance of the shaft current sensor 2 can be detected, the insulation goodness of the shaft current sensor can be judged, the checking accuracy of the checking device on the detector can be improved, the stability of mechanical equipment in the high-speed running process can be improved, and the operation efficiency of the mechanical equipment can be improved; the first power supply device 3 is in electric wire connection with the shaft current monitor 4 through an electric wire, the display device 5 is in electric wire connection with the shaft current monitor 4 through an electric wire, the structure is reasonable, and the device is convenient to mount and dismount in the using process.
The utility model discloses a theory of operation and use flow: when a test is started, a test lead 7 is wound on the shaft current sensor 2, the head and the tail of the test lead 7 are connected to an alternating current output gear of the relay protector 8, the relay protector 8 is opened, the output of 50Hz/150Hz alternating current is set, the output current of the relay protector 8 is adjusted according to actual conditions, after stable output, data processed by the shaft current monitor 4 is observed and recorded at the display device 5, the accuracy of the shaft current sensor 2 and the shaft current monitor 4 can be calculated by comparing the difference value between the input value of the relay protector 8 and the display value on the display device 5, when the relay protector 8 inputs a shaft current alarm value set in a factory, whether the value on the display device 5 is accurate is observed, whether a shaft current alarm signal exists on the computer monitoring system 10 is observed, the alarm output function of the shaft current monitor 4 can be checked to be intact, the insulation resistance tester 6 is connected with the shell of the shaft current sensor 2 through a connecting lead 11 of the shaft current monitor 4, the insulation resistance of the shaft current sensor 2 can be monitored, and the insulation resistance tester can judge that the insulation performance is good.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides an axle current monitor calibration equipment, includes hydraulic turbine main shaft (1), its characterized in that: the outside of hydraulic turbine main shaft (1) is provided with axle current sensor (2), one side of axle current sensor (2) is provided with experimental wire (7), the one end of experimental wire (7) is connected with relay protector (8), the input of relay protector (8) is provided with second power supply unit (9), axle current sensor (2) opposite side is connected with connecting wire (11), the upper end of connecting wire (11) is provided with insulation resistance tester (6), the one end of connecting wire (11) is connected with axle current monitor (4), the upper end of axle current monitor (4) is provided with display device (5), the input of axle current monitor (4) is provided with first power supply unit (3).
2. The shaft current monitor calibrating device according to claim 1, wherein: there is electric connection in experimental wire (7) through relay protector (8) and second power supply unit (9), even winding in one side of axle current sensor (2) is in experimental wire (7), the output of experimental wire (7) is connected with the input of relay protector (8), the input of the defeated of experimental wire (7) is connected with the output of relay protector (8).
3. The shaft current monitor calibrating device of claim 1, wherein: the output end of the shaft current monitor (4) is provided with a computer monitoring system (10), and the shaft current sensor (2) is electrically connected with the shaft current monitor (4) through a connecting wire (11).
4. The shaft current monitor calibrating device of claim 1, wherein: the insulation resistance tester (6) is connected with the shell of the shaft current sensor (2) through a connecting lead (11) of the shaft current monitor (4).
5. The shaft current monitor calibrating device of claim 1, wherein: the first power supply device (3) is in electric wire connection with the shaft current monitor (4) through an electric wire, and the display device (5) is in electric wire connection with the shaft current monitor (4) through an electric wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221582411.2U CN217739455U (en) | 2022-06-23 | 2022-06-23 | Shaft current monitor calibration equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221582411.2U CN217739455U (en) | 2022-06-23 | 2022-06-23 | Shaft current monitor calibration equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217739455U true CN217739455U (en) | 2022-11-04 |
Family
ID=83841883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221582411.2U Active CN217739455U (en) | 2022-06-23 | 2022-06-23 | Shaft current monitor calibration equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217739455U (en) |
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2022
- 2022-06-23 CN CN202221582411.2U patent/CN217739455U/en active Active
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