CN210380550U - Insulating structure that detects of hydraulic generator apical axis - Google Patents
Insulating structure that detects of hydraulic generator apical axis Download PDFInfo
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- CN210380550U CN210380550U CN201921895214.4U CN201921895214U CN210380550U CN 210380550 U CN210380550 U CN 210380550U CN 201921895214 U CN201921895214 U CN 201921895214U CN 210380550 U CN210380550 U CN 210380550U
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- polyimide film
- apical axis
- sliding ring
- ring
- detects
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Abstract
The utility model discloses a simple structure, reliable performance's insulating structure that detects of hydraulic generator apical axis. The device consists of a copper connecting sheet, a polyimide film, a lower slip ring, an upper slip ring, an insulating screw and an electric brush. The utility model discloses accessible polyimide film plays insulating effect between apical axis and sliding rotor to whether the resistance of going up between slip rotor's the slip ring, gliding ring and gliding ring to ground detects insulation system and is destroyed through detecting.
Description
The technical field is as follows:
the utility model relates to an insulating structure that detects of hydraulic generator apical axis.
Background art:
during operation of the water turbine generator, an induced alternating potential (shaft voltage) is generated at the rotor shaft, and an alternating current flows in the circuit above the rotor, i.e. a shaft current. If the current passes through the guide bearing, the guide bearing is subjected to electric corrosion, and the safe and stable operation of the unit is further influenced.
Therefore, in order to prevent the shaft current from electrically corroding the guide bearing and damaging the unit structure, a detectable insulating film copper-sandwiched connecting sheet structure between the top shaft and the sliding rotor is designed during the operation of the water turbine generator set.
The invention content is as follows:
the utility model aims at providing a simple structure, reliable performance's insulating structure that detects of hydraulic generator apical axis. The technical scheme of the utility model is that: the device consists of a copper connecting sheet, a first polyimide film, a second polyimide film, a lower slip ring, an upper slip ring, an insulating screw and an electric brush. After a first polyimide film, a copper connecting sheet and a second polyimide film are sequentially wound and led out between the top shaft and the sliding rotor, the copper connecting sheet is connected to the lower sliding ring, the electric brush is respectively connected with the lower sliding ring and the upper sliding ring, and the upper sliding ring and the lower sliding ring are fixed at the upper end of the sliding rotor through the insulating screw. The first polyimide film and the second polyimide film are made of insulating materials, the first polyimide film is clamped between the top shaft and the copper connecting sheet, the second polyimide film is clamped between the copper connecting sheet and the sliding rotor, and the copper connecting sheet is clamped between the first polyimide film and the second polyimide film.
The technical effects are as follows:
the traditional hydroelectric generating set apical axis structure can not detect the shaft insulation. Shaft current may cause galvanic corrosion to the guide bearing, which may harm the safe and stable operation of the machine set.
The utility model discloses can play insulating effect between apical axis and sliding rotor through the polyimide film to whether the resistance of going up between slip ring, the gliding ring through detecting sliding rotor and gliding ring to ground detects insulation system and is destroyed.
Description of the drawings:
fig. 1 is the utility model discloses hydraulic generator apical axis insulation detects the structure sketch.
The specific implementation mode is as follows:
as shown in figure 1, the utility model discloses an insulating structure that detects of hydraulic generator apical axis. After a first polyimide film 2, a copper connecting sheet 1 and a second polyimide film 3 are sequentially wound and led out between a top shaft 8 and a sliding rotor 9, the copper connecting sheet 1 is connected to a lower sliding ring 4, an electric brush 7 is respectively contacted with the lower sliding ring 4 and an upper sliding ring 5, and the upper sliding ring 5 and the lower sliding ring 4 are fixed at the upper end of the sliding rotor 9 through an insulating screw 6.
The resistance between the lower slip ring 4 and the upper slip ring 5 is detected by the brush 7. If the resistance is large, it indicates that the insulation of the second polyimide film 3 between the copper connecting sheet 1 and the slider 9 has not failed. If the resistance is extremely low, this indicates an insulation failure of the second polyimide film 3 between the copper connecting tab 1 and the slider 9.
The resistance between the lower slip ring 4 and ground is detected by the brush 7. If the resistance is large, it indicates that the insulation of the first polyimide film 2 between the copper connection sheet 1 and the top shaft 8 has not failed. If the resistance is extremely small, it indicates that the insulation of the first polyimide film 2 between the connecting sheet 1 and the top shaft 8 is lost.
Claims (2)
1. The utility model provides a hydraulic generator apical axis insulation detects structure, characterized by: by copper connection piece (1), first polyimide film (2), second polyimide film (3), lower sliding ring (4), go up sliding ring (5), insulating screw rod (6), brush (7) are constituteed, after package and draw forth first polyimide film (2) around in proper order between apical axis (8) and smooth rotor (9), copper connection piece (1), second polyimide film (3), be connected to lower sliding ring (4) copper connection piece (1), brush (7) and lower sliding ring (4), go up sliding ring (5) and be connected respectively, insulating screw rod (6) will go up sliding ring (5), lower sliding ring (4) are fixed in the upper end of smooth rotor (9).
2. The insulation detection structure of the hydraulic generator top shaft according to claim 1, which is characterized in that: first polyimide film (2), second polyimide film (3) be insulating material, first polyimide film (2) press from both sides in the centre of apical axis (8) and copper connection piece (1), second polyimide film (3) press from both sides in the centre of copper connection piece (1) and smooth rotor (9), copper connection piece (1) press from both sides in polyimide film (2) and polyimide film (3) centre.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921895214.4U CN210380550U (en) | 2019-11-06 | 2019-11-06 | Insulating structure that detects of hydraulic generator apical axis |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921895214.4U CN210380550U (en) | 2019-11-06 | 2019-11-06 | Insulating structure that detects of hydraulic generator apical axis |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210380550U true CN210380550U (en) | 2020-04-21 |
Family
ID=70257326
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921895214.4U Active CN210380550U (en) | 2019-11-06 | 2019-11-06 | Insulating structure that detects of hydraulic generator apical axis |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210380550U (en) |
-
2019
- 2019-11-06 CN CN201921895214.4U patent/CN210380550U/en active Active
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