CN204556730U - Large-sized water turbine generator stator bar groove portion surface resistance testing instrument - Google Patents
Large-sized water turbine generator stator bar groove portion surface resistance testing instrument Download PDFInfo
- Publication number
- CN204556730U CN204556730U CN201520126090.9U CN201520126090U CN204556730U CN 204556730 U CN204556730 U CN 204556730U CN 201520126090 U CN201520126090 U CN 201520126090U CN 204556730 U CN204556730 U CN 204556730U
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- China
- Prior art keywords
- groove portion
- bar groove
- stator bar
- power supply
- conductor
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- Expired - Fee Related
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Abstract
The utility model discloses a kind of large-sized water turbine generator stator bar groove portion surface resistance testing instrument.Stator bar groove portion surface resistance testing instrument is made up of indicator type current meter, power supply, fixed resistance, sub-thread copper conductor and multiply copper stranded conductor; Select finger formula reometer is as current indicator, be connected in series as power supply with 2 joint dry cells, the resistance of wire wound fixed resistance is 1000 Ω, reometer, power supply, fixed resistance is connected in series with the sub-thread copper conductor that diameter is 2mm, and draws two long lead-in wires for 1000mm; Exposed connection copper conductor surface wrap polyester adhesive between reometer, power supply, fixed resistance; The surface wrap polyimide adhesive tape of two lead-in wires; According to the sectional dimension in the turbine generator stator bar groove portion spacing as multiply copper stranded conductor; Multiply copper stranded conductor is wound around along stator bar groove portion cross-wise direction, is connected to device lead-in wire.
Description
Technical field: the utility model relates to a kind of large-sized water turbine generator stator bar groove portion surface resistance testing instrument.
Background technology: prevent the generation of groove portion short trouble unshakable in one's determination for the potential corrosion eliminated in operational process, usual needs hold or brushing low-resistance anti-halation layer on surface, large-sized water turbine generator stator bar groove portion, for the processing quality of inspection low-resistance corona-prevention layer, traditional test unit adopts parallel pole to connect multimeter to test in face one by one, this test unit can only one-time detection groove portion and a unshakable in one's determination surface of contact, can not detect the distribution of resistance situation in whole cross section, there is error in its test result; Meanwhile, because multimeter is common apparatus, not make for this test is special, thus in test process, also there is certain measuring error.
Summary of the invention: the purpose of this utility model is open a kind of large-sized water turbine generator stator bar groove portion surface resistance testing instrument improving experimental accuracy, and the technical solution of the utility model is: be made up of indicator type current meter (1), power supply (2), fixed resistance (3), sub-thread copper conductor (4), multiply copper stranded conductor (5); Select full scale scale be the indicator type current meter (1) of 3mA as current indicator, the minimum scale of indicator type current meter (1) is 0.1mA; 2 joint 5# dry cells are connected in series as power supply (2); Fixed resistance (3) is wire-wound resistor, and its resistance is 1000 Ω; Be that indicator type current meter (1), power supply (2), fixed resistance (3) are connected in series by the sub-thread copper conductor (4) of 2mm with diameter, and draw two long lead-in wires for 1000mm; Connection copper conductor surface wrap polyester adhesive exposed between indicator type current meter (1), power supply (2), fixed resistance (3); The polyimide adhesive tape of the surface wrap fine heat-resisting performance of two lead-in wires, adhesive tape is wound to apart from lead terminal 50mm place; The sub-thread copper conductor that every root multiply copper stranded conductor (5) is 1mm by 2 diameters is entwined mutually.
According to the sectional dimension in the turbine generator stator bar groove portion spacing as multiply copper stranded conductor (5); Two of equal length multiply copper stranded conductors (5) are wound around along stator bar groove portion cross-wise direction, are connected to device lead-in wire.
The utility model has compared more accurate measurement result with other generator stator bar groove portion surface resistance measuring method, and the result obtained has drawn generator stator bar groove portion surface resistivity more accurately.In the past conventional measuring method adopts parallel pole (40mm × 10mm) method to measure, there is following defect: when 1) measuring, electrode exterior can form galvanic circle, cause measured resistance value to be less than actual value 2) due to electrode can not apply ointment or plaster completely line rod surface, so apply ointment or plaster when measuring, tightness has measurement result significantly affects 3) result measured is interelectrode sheet resistance value, needs to be converted into surface resistivity for we use.Innovative point of the present utility model compensate for the defect of parallel pole mensuration: 1) interelectrode distance is line rod sectional dimension, use as electrode with two annealed copper wires, longitudinal wrap wire rod surface, this way can eliminate the galvanic circle that electrode exterior is formed, improving the precision 2 measured) annealed copper wire that uses of electrode can better apply ointment or plaster online rod surface, reduces the measuring error brought due to tightness of applying ointment or plaster.3). potential electrode of the present utility model is square electrode, and namely the result of gained is surface resistivity, eliminates the step of sheet resistance value conversion table surface resistivity.The utility model has significantly perfect and raising compared in the past conventional generator stator bar groove portion surface resistivity measuring method.
Accompanying drawing illustrates:
Fig. 1 is large-sized water turbine generator stator bar groove portion surface resistance testing instrument schematic diagram
Embodiment:
As shown in Figure 1, stator bar groove portion surface resistance testing instrument is made up of indicator type current meter 1, power supply 2, fixed resistance 3, sub-thread copper conductor 4 and multiply copper stranded conductor 5; Select full scale scale be the indicator type current meter 1 of 3mA as current indicator, the minimum scale of indicator type current meter 1 is 0.1mA; 2 joints 5
#dry cell is connected in series as power supply 2; Fixed resistance is wire-wound resistor 3, and its resistance is 1000 Ω; Be that indicator type current meter 1, power supply 2, fixed resistance 3 are connected in series by the sub-thread copper conductor 4 of 2mm with diameter, and draw two long lead-in wires for 1000mm; Exposed connection copper conductor surface wrap polyester adhesive between indicator type current meter 1, power supply 2, fixed resistance 3; The polyimide adhesive tape of the surface wrap fine heat-resisting performance of two lead-in wires, adhesive tape is wound to apart from lead terminal 50mm place; According to the sectional dimension of the turbine generator stator bar spacing as multiply copper stranded conductor 5 (electrode), the sub-thread copper conductor that every root multiply copper stranded conductor 5 is 1mm by 2 diameters is entwined mutually.Two of equal length multiply copper stranded conductors 5 are wound around along stator bar groove portion cross-wise direction, are connected to device lead-in wire.
Claims (2)
1. a large-sized water turbine generator stator bar groove portion surface resistance testing instrument, is characterized in that: be made up of indicator type current meter (1), power supply (2), fixed resistance (3), sub-thread copper conductor (4), multiply copper stranded conductor (5); Select full scale scale be the indicator type current meter (1) of 3mA as current indicator, the minimum scale of indicator type current meter (1) is 0.1mA; 2 joints 5
#dry cell is connected in series as power supply (2); Fixed resistance (3) is wire-wound resistor, and its resistance is 1000 Ω; Be that indicator type current meter (1), power supply (2), fixed resistance (3) are connected in series by the sub-thread copper conductor (4) of 2mm with diameter, and draw two long lead-in wires for 1000mm; Connection copper conductor surface wrap polyester adhesive exposed between indicator type current meter (1), power supply (2), fixed resistance (3); The polyimide adhesive tape of the surface wrap fine heat-resisting performance of two lead-in wires, adhesive tape is wound to apart from lead terminal 50mm place; The sub-thread copper conductor (4) that every root multiply copper stranded conductor (5) is 1mm by 2 diameters is entwined mutually.
2. a kind of large-sized water turbine generator stator bar groove portion according to claim 1 surface resistance testing instrument, is characterized in that: according to the sectional dimension in the turbine generator stator bar groove portion spacing as multiply copper stranded conductor (5); Two of equal length multiply copper stranded conductors (5) are wound around along stator bar groove portion cross-wise direction, are connected to device lead-in wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520126090.9U CN204556730U (en) | 2015-03-05 | 2015-03-05 | Large-sized water turbine generator stator bar groove portion surface resistance testing instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520126090.9U CN204556730U (en) | 2015-03-05 | 2015-03-05 | Large-sized water turbine generator stator bar groove portion surface resistance testing instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204556730U true CN204556730U (en) | 2015-08-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520126090.9U Expired - Fee Related CN204556730U (en) | 2015-03-05 | 2015-03-05 | Large-sized water turbine generator stator bar groove portion surface resistance testing instrument |
Country Status (1)
| Country | Link |
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| CN (1) | CN204556730U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976578A (en) * | 2017-12-11 | 2018-05-01 | 深圳市三慧智国际智能系统有限公司 | A kind of sheet resistance test platform |
-
2015
- 2015-03-05 CN CN201520126090.9U patent/CN204556730U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976578A (en) * | 2017-12-11 | 2018-05-01 | 深圳市三慧智国际智能系统有限公司 | A kind of sheet resistance test platform |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150812 Termination date: 20210305 |