CN203632478U - Shaft current protective device for water wheel generator - Google Patents
Shaft current protective device for water wheel generator Download PDFInfo
- Publication number
- CN203632478U CN203632478U CN201320724504.9U CN201320724504U CN203632478U CN 203632478 U CN203632478 U CN 203632478U CN 201320724504 U CN201320724504 U CN 201320724504U CN 203632478 U CN203632478 U CN 203632478U
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- CN
- China
- Prior art keywords
- shaft current
- supporting plate
- protective device
- support plate
- current transformer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Abstract
The utility model discloses a shaft current protective device for a water wheel generator, relating to shaft current protective devices. The shaft current protective device comprises a shaft current transformer (2) which sleeves a generator shaft (1) and a locating plate (4) which is mounted on a set body (1); the upper end of the shaft current transformer (2) is connected with a first support plate (51), the lower end of the shaft current transformer (2) is provided with a second support plate (52), and a third support plate (53) is connected between the first support plate (51) and the second support plate (52); and the first support plate (51) is connected with the locating plate (4) via bolts or screws (6), and the second support plate (52) and the third support plate (53) are both connected with the shaft current transformer (2) via adjusting rods (7). The shaft current protective device for the water wheel generator is simple in structure and convenient to install, can detect the shaft current within the range from 0.1 to 2.0A, can effectively avoid oil-quality change caused by the shaft current, and achieves the goal of protecting bearings of the set.
Description
Technical field
The utility model relates to the protective device of shaft current, specifically a kind of hydraulic generator shaft current protective device.
Background technology
At present, hydraulic generator is since going into operation, during unit operation, there is shaft current always, the size of shaft current increases with the increase of output of a generator, although this axle electromotive force numerical value little (generally at about tens volts), but because armature spindle internal resistance is very little, if axle electromotive force is the layout along bearing and closed-loop path that base plate forms, shaft current can reach very large numerical value (hundreds of to thousands of amperes), the shaft current that numerical value is very large can cause oil to change, and bearing vibration amplitude is increased, thereby very easily cause the accidents such as bearing shell burn.
The existing mode that prevents hydraulic generator arbor generation shaft current for connecing grounding carbon brush on macro-axis, although taked above-mentioned measure, but the safety of bearing has not just had assurance as much as to say, from operation principle, the destructiveness of bearing shell depends on amplitude and the action time of shaft current; From operation angle, operations staff needs to know at any time or in advance the variation of shaft current or the damaged condition of bearing insulation, is therefore necessary to improve.
Summary of the invention
The purpose of this utility model is the weak point in order to overcome background technology, and a kind of hydraulic generator shaft current protective device providing.
To achieve these goals, the technical solution of the utility model is: hydraulic generator shaft current protective device, it is characterized in that: comprise the axial current transformer being sleeved on generator shaft, and be arranged on the location-plate in generating set main body, the upper end of described axial current transformer is connected with the first supporting plate, the lower end of axial current transformer is provided with the second supporting plate, is connected with the 3rd supporting plate between the first supporting plate and the second supporting plate; The first supporting plate is connected with location-plate by bolt or screw, and the second supporting plate is all connected with axial current transformer by adjusting rod with the 3rd supporting plate.
Described the first supporting plate, the second supporting plate and the 3rd supporting plate are integral arrangement.
Described the first supporting plate is fixed on location-plate by two bolts or two screws.
Described adjusting rod is adjusting bolt or adjusting screw(rod).
In technique scheme, bolt or screw can make the first supporting plate and location-plate interfix; Adjusting rod can make the staff position of regulating shaft current transformer as required.
The utility model is simple in structure, easy for installation, the shaft current of 0.1～2.0A can be detected, not only can effectively avoid the oil causing because of shaft current to change, and can reach the object of protection unit bearing safety.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
1-generator shaft in figure, 2-axial current transformer, 3-generating set main body, 4-location-plate, 51-the first supporting plate, 52-the second supporting plate, 53-the 3rd supporting plate, 6-bolt or screw, 7-adjusting rod.
Embodiment
Describe performance of the present utility model in detail below in conjunction with accompanying drawing, but they do not form to restriction of the present utility model, only for example.Make advantage of the present utility model more know and easily understand by explanation simultaneously.
Consult accompanying drawing known: hydraulic generator shaft current protective device, comprise the axial current transformer 2 being sleeved on generator shaft 1, and be arranged on the location-plate 4 in generating set main body 3, the upper end of described axial current transformer 2 is provided with the first supporting plate 51, the lower end of axial current transformer 2 is provided with between the second supporting plate 52, the first supporting plates 51 and the second supporting plate 52 and is connected with the 3rd supporting plate 53; The first supporting plate 51 is connected with location-plate 4 by bolt or screw 6, and the second supporting plate 52 is all connected with axial current transformer 2 by adjusting rod 7 with the 3rd supporting plate 53.In described axial current transformer 2, be provided with iron core 21.
Described the first supporting plate 51, the second supporting plate 52 and the 3rd supporting plate 53 are integral arrangement.
Described the first supporting plate 51 is fixed on location-plate 4 by two bolts or two screws 6.
Described adjusting rod 7 is adjusting bolt or adjusting screw(rod).
Bolt or screw 6 can make the first supporting plate 51 and location-plate 4 interfix; Adjusting rod 7 can make the staff position of regulating shaft current transformer 2 as required.
In practical work process, axial current transformer is a kind of special instrument transformer, can detect the shaft current below 2A.Utilize axial current transformer monitoring stream on macro-axis to cross the electric current of macro-axis, unit tripping grinder when overrate.The utility model can detect the shaft current of 0.1～2.0A; once therefore the insulation of generator upper shaft is impaired, produces shaft current, the utility model will move; and actuating signal is passed to unit and unit tripping is shut down, thereby reach the object of protecting unit bearing safety.
Other unaccounted part all belongs to prior art.
Claims (4)
1. hydraulic generator shaft current protective device, it is characterized in that: comprise the axial current transformer (2) being sleeved on generator shaft (1), and be arranged on the location-plate (4) in generating set main body (3), the upper end of described axial current transformer (2) is connected with the first supporting plate (51), the lower end of axial current transformer (2) is provided with the second supporting plate (52), is connected with the 3rd supporting plate (53) between the first supporting plate (51) and the second supporting plate (52); The first supporting plate (51) is connected with location-plate (4) by bolt or screw (6), and the second supporting plate (52) is all connected with axial current transformer (2) by adjusting rod (7) with the 3rd supporting plate (53).
2. hydraulic generator shaft current protective device according to claim 1, is characterized in that: described the first supporting plate (51), the second supporting plate (52) and the 3rd supporting plate (53) are integral arrangement.
3. hydraulic generator shaft current protective device according to claim 1, is characterized in that: described the first supporting plate (51) is fixed on location-plate (4) by two bolts or two screws (6).
4. according to the hydraulic generator shaft current protective device described in any one claim in claims 1 to 3, it is characterized in that: described adjusting rod (7) is adjusting bolt or adjusting screw(rod).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320724504.9U CN203632478U (en) | 2013-11-15 | 2013-11-15 | Shaft current protective device for water wheel generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320724504.9U CN203632478U (en) | 2013-11-15 | 2013-11-15 | Shaft current protective device for water wheel generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203632478U true CN203632478U (en) | 2014-06-04 |
Family
ID=50818914
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320724504.9U Expired - Lifetime CN203632478U (en) | 2013-11-15 | 2013-11-15 | Shaft current protective device for water wheel generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203632478U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114146669A (en) * | 2021-12-24 | 2022-03-08 | 江苏中信国安新材料有限公司 | Rubber mixing and dissolving system and process in polystyrene production |
-
2013
- 2013-11-15 CN CN201320724504.9U patent/CN203632478U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114146669A (en) * | 2021-12-24 | 2022-03-08 | 江苏中信国安新材料有限公司 | Rubber mixing and dissolving system and process in polystyrene production |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |