CN220043255U - Polarity switching device for excitation cable of hydraulic generator - Google Patents
Polarity switching device for excitation cable of hydraulic generator Download PDFInfo
- Publication number
- CN220043255U CN220043255U CN202321015989.4U CN202321015989U CN220043255U CN 220043255 U CN220043255 U CN 220043255U CN 202321015989 U CN202321015989 U CN 202321015989U CN 220043255 U CN220043255 U CN 220043255U
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- static contact
- contact plate
- contact plates
- switching device
- polarity switching
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- 230000005284 excitation Effects 0.000 title claims abstract description 24
- 230000003068 static effect Effects 0.000 claims abstract description 63
- 239000012634 fragment Substances 0.000 claims description 15
- 238000009413 insulation Methods 0.000 claims description 10
- 230000008719 thickening Effects 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000010248 power generation Methods 0.000 claims 1
- 230000000712 assembly Effects 0.000 abstract description 3
- 238000000429 assembly Methods 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 8
- 229910052799 carbon Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Arc-Extinguishing Devices That Are Switches (AREA)
Abstract
The utility model provides a polarity switching device of an excitation cable of a hydraulic generator, which comprises an insulating plate, wherein two movable contact plates are symmetrically arranged in the middle of the insulating plate, two first static contact plates and two second static contact plates are respectively arranged at opposite angles on two sides of the movable contact plates, the two first static contact plates and the two second static contact plates are respectively connected through a conducting plate, clamping assemblies are respectively arranged on the movable contact plates, the first static contact plates and the second static contact plates are identical in structure, a closing assembly is further arranged on the upper side of the movable contact plates, the closing assembly comprises plug boards which are arranged in parallel, the plug boards are hinged through bolts and the clamping assemblies, and support pipes are detachably connected between the two bolts. The utility model has compact structure and ingenious design, can ensure high precision and good stability when switching the switching polarity, and greatly improves the operation efficiency.
Description
Technical Field
The utility model relates to the technical field of water turbines, in particular to a polarity reversing device for excitation cables of a water turbine generator.
Background
Excitation current is transmitted to the rotating collecting ring from the static brush frame through the slip ring device, and then is transmitted to the generator rotor winding through the lead copper bar. The slip ring device consists of a slip ring, a brush holder and a carbon powder absorbing device and is arranged in a slip ring cover at the upper part of the rotor. The current input by the collecting ring of the generator is direct current, and the collecting ring has positive and negative poles, namely different polarities. Because the electrochemical corrosion of the anode and the cathode of the collecting ring is different, the abrasion condition of the surface of the slip ring is also different. After long-term observation, when the carbon brush is connected to the positive electrode, the carbon brush is seriously and mechanically worn, and the electric wear and the mechanical wear of the collecting ring are slight; when the carbon brush is connected to the negative electrode, the carbon brush is slightly and mechanically worn, the electrical wear and mechanical wear of the collecting ring are serious, so that the long-term result can cause frequent replacement of the carbon brush of the positive electrode, the surface of the collecting ring on the negative electrode is quickly worn, and the service life of the slip ring is shortened.
After the generator runs for a period of time, the polarity of the excitation cable of the generator needs to be switched, namely, the polarity of the excitation cable is switched in a generator wind tunnel or the polarity of the anode cable and the cathode cable is switched at the brush frame of the generator slip ring chamber, the excitation cable needs to be continuously disassembled and assembled, the workload is large, and the risk of high-altitude operation or cable damage exists.
When the electric tests such as the insulation resistance measurement of the rotor winding of the generator and the resistance measurement of the magnetic pole joint are carried out, the grounding protection of the generator rotor is needed to be withdrawn, the excitation carbon brush is taken down, the grounding protection of the generator rotor is needed after the test is completed, the excitation carbon brush is needed to be recovered, and the working procedure is complex. The +Chinese patent document CN 213243784U describes a million-grade generator rotor excitation polarity switching device, but the device cannot better ensure the plugging accuracy during the commutation; chinese patent document CN 215120474U describes a double positive-negative polarity conversion device of an excitation system, which still cannot ensure the stability of the clamped state, and has drawbacks in use.
Disclosure of Invention
The utility model provides a polarity switching device for exciting cables of a hydraulic generator, which solves the problems that the polarity switching is relatively complex, the accuracy is possibly reduced in the switching-on and switching-on process, and the overall stability is poor.
In order to solve the technical problems, the utility model adopts the following technical scheme: the utility model provides a hydraulic generator excitation cable polarity switching device, including the insulation board, the middle part symmetry of insulation board is equipped with two movable contact plates, the both sides of movable contact plate set up two first static contact plates and second static contact plates diagonally respectively, two first static contact plates and two second static contact plates are connected through leading the board respectively, be equipped with clamping assembly on movable contact plate, first static contact plate and the second static contact plate respectively, first static contact plate is the same with the second static contact plate structure, the upside of movable contact plate still is equipped with the closing component, the closing component includes parallel arrangement's plugboard, the plugboard passes through bolt and clamping assembly and articulates, detachable is connected with the stay tube between two bolts.
In the preferred scheme, a fourth threaded hole is formed in the support tube in a penetrating mode, and the bolt is in threaded connection with the support tube.
In a preferred embodiment, the support tube has a hexagonal cross-sectional profile.
In the preferred scheme, the clamping assembly comprises a fixing seat, a first through hole is formed in the fixing seat, the fixing seat is respectively fixedly arranged on a movable contact plate, a first static contact plate and a second static contact plate through locking nails, a first threaded hole is formed in the movable contact plate, a second threaded hole is respectively formed in the first static contact plate and the second static contact plate, two elastic sheets are arranged on the fixing seat in parallel, a second through hole is formed in each elastic sheet, and bolts penetrate through the second through holes.
In the preferred scheme, the middle part of shell fragment is equipped with the circular arc arch, and the bottom symmetry of plugboard is equipped with the thickening piece, is equipped with the third through-hole on the thickening piece, is equipped with the nut between bolt and the stay tube, and two plugboards pass through the jam plate and connect, are equipped with handheld ring on the jam plate.
In the preferred scheme, the middle part symmetry of insulation board is equipped with two first recesses, and the both sides parallel of first recess are equipped with two second recesses, and the symmetry still is equipped with in the second recess and dodges the groove, and movable contact plate sets firmly in first recess, and first static contact plate and second static contact plate set up respectively in the second recess.
In the preferred scheme, the second recess both sides are equipped with respectively and dodge the groove, and the outside of first static touch board and second static touch board is symmetrical respectively to be equipped with the epitaxial board, and the appearance of epitaxial board is with dodging the groove phase-match, is equipped with the third screw hole on the epitaxial board, and the upper portion cover of shell fragment is equipped with limit sleeve, and limit sleeve's outside parallel is equipped with two push plates, is equipped with the fourth through-hole on the push plate, and the bolt wears to establish at fourth through-hole and third screw hole.
In the preferred scheme, a through groove is arranged in the limit sleeve, and the cross section sizes of the through groove and the elastic sheet are matched.
In a preferred embodiment, the ends of the two push plates are connected by a synchronizing plate.
In a preferred scheme, the upper part of the limit sleeve is provided with an inclined plane.
The beneficial effects of the utility model are as follows: through setting up two first static contact plates and second static contact plates respectively to the diagonal angle, the conduction board communicates two first static contact plates and second static contact plates respectively to succinct efficient completion polarity switching's process sets up the stay tube of being made by pottery between the clamp assembly of movable contact plate simultaneously, thereby the stay tube forms stable connection between two clamp assemblies, carries out effective control to the range of motion and the angle of plug board, has guaranteed the accuracy of back and forth grafting switching-over in-process, installs spacing sleeve on the clamp assembly of first static contact plate and second static contact plate, then supports the shell fragment from the outside with the bolt, has guaranteed to laminate closely between shell fragment and the plugboard, and is effectual that whole switching-on, and load-carrying capacity is strong.
Drawings
The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:
FIG. 1 is a schematic view of the present utility model in state one;
FIG. 2 is a schematic front view of FIG. 1;
FIG. 3 is a left side schematic view of FIG. 1;
FIG. 4 is a schematic top view of FIG. 1;
FIG. 5 is a schematic bottom view of FIG. 1;
FIG. 6 is a schematic state II of the present utility model;
FIG. 7 is a schematic diagram of the explosive structure of FIG. 6;
FIG. 8 is a schematic diagram of an explosion configuration of the moving contact mounting clamp assembly and closing assembly of the present utility model;
fig. 9 is an enlarged schematic view of the structure at a of fig. 7.
In the figure: an insulating plate 1; a first groove 101; a second groove 102; an avoidance groove 103; a movable contact plate 2; a first threaded hole 201; a first stationary contact plate 3; a second stationary contact plate 4; a clamping assembly 5; a spring plate 501; arc protrusion 502; a fixing base 503; a first through hole 504; a second through hole 505; a closing component 6; a plug board 601; a lock plate 602; a hand-held ring 603; a thickening piece 604; a third through hole 605; a conductive plate 7; a bolt 8; a nut 9; a support tube 10; a fourth screw hole 1001; hexagonal shape 1002; a limit sleeve 11; a through slot 1101; a pusher plate 1102; a fourth through hole 1103; a synchronization board 1104; bevel 1105; an epitaxial plate 12; a second threaded hole 13; a third threaded hole 14; a locking pin 15.
Detailed Description
In fig. 1-6, a hydraulic generator excitation cable polarity switching device, including insulation board 1, the middle part symmetry of insulation board 1 is equipped with two movable contact plates 2, two first static contact plates 3 and second static contact plates 4 are set up to the both sides of movable contact plate 2 respectively to the angle, two first static contact plates 3 and two second static contact plates 4 are connected through switch-on board 7 respectively, be equipped with clamp assembly 5 on movable contact plate 2, first static contact plates 3 and the second static contact plates 4 respectively, first static contact plates 3 and second static contact plates 4 are the same in structure, the upside of movable contact plate 2 still is equipped with switch-on subassembly 6, switch-on subassembly 6 includes parallel arrangement's plugboard 601, plugboard 601 is articulated through bolt 8 and clamp assembly 5, detachable being connected with stay tube 10 between two bolts 8. From this structure to make two movable contact plates 2 support the switching-on subassembly, two first static contact plates 3 and two second static contact plates 4 cooperate to form the switch of double-pole double-throw, clamping assembly 5 on two movable contact plates 2 is spacing through stay tube 10, thereby has guaranteed the fixed firm to the plugboard 601, and whole convenient operation, stability is high.
In a preferred embodiment, a fourth threaded hole 1001 is formed in the support tube 10, and the bolt 8 is in threaded connection with the support tube 10. With this structure, the support pipe 10 can be conveniently assembled and disassembled, and maintenance and adjustment are facilitated.
In a preferred embodiment, the support tube 10 has a hexagonal shape 1002 in cross-section. With the structure, the operation is more convenient, and the hexagonal arrangement is adopted, so that the manufacturing process is mature.
In a preferred embodiment, as shown in fig. 7-9, the clamping assembly 5 includes a fixing base 503, a first through hole 504 is formed in the fixing base 503, the fixing base 503 is respectively and fixedly arranged on the movable contact plate 2, the first static contact plate 3 and the second static contact plate 4 through locking nails 15, a first threaded hole 201 is formed in the movable contact plate 2, a second threaded hole 13 is respectively formed in the first static contact plate 3 and the second static contact plate 4, two elastic sheets 501 are parallel arranged on the fixing base 503, a second through hole 505 is formed in the elastic sheets 501, and a bolt 8 is arranged in the second through hole 505 in a penetrating manner. From this structure to make the installation of clamping assembly 5 simple high-efficient, two shell fragments 501 cooperate fixing base 503 to form the centre gripping space, accomplish spacing to the plugboard 601, guaranteed closely with the laminating between the plugboard 601, two shell fragments 501 provide the support for bolt 8 simultaneously, overall structure is compact firm.
In the preferred scheme, the middle part of shell fragment 501 is equipped with circular arc arch 502, and the bottom symmetry of plugboard 601 is equipped with thickening piece 604, is equipped with third through hole 605 on the thickening piece 604, is equipped with nut 9 between bolt 8 and the stay tube 10, and two plugboards 601 pass through locking plate 602 connection, are equipped with handheld ring 603 on the locking plate 602. From this structure to make circular arc arch 502 form anti-bow, play better supporting role to shell fragment 501, guarantee the stability of centre gripping, handheld ring 603 is as operating handle, and is more convenient when the operation, and the laminating that thickening piece 604 then can be better is at the inside wall of shell fragment 501, and the contact is stable.
In the preferred scheme, the middle part symmetry of insulation board 1 is equipped with two first recesses 101, and the both sides parallel of first recess 101 are equipped with two second recesses 102, and the symmetry still is equipped with in the second recess 102 and dodges groove 103, and movable contact plate 2 sets firmly in first recess 101, and first static contact plate 3 and second static contact plate 4 set up respectively in second recess 102. From this structure to make holistic ann tear convenience open, insulation board 1 provides insulating stable work basis for movable contact plate 2, first static contact plate 3 and second static contact plate 4, and can bear certain impact load, guarantees long service life.
In the preferred scheme, the second recess 102 both sides are equipped with respectively and dodge the groove 103, and the outside of first quiet touch panel 3 and second quiet touch panel 4 is equipped with epitaxial plate 12 respectively symmetrically, and epitaxial plate 12's appearance and dodge the groove 103 assorted, be equipped with third screw hole 14 on the epitaxial plate 12, the upper portion cover of shell fragment 501 is equipped with spacing sleeve 11, and spacing sleeve 11's outside parallel is equipped with two push pedal 1102, is equipped with fourth through hole 1103 on the push pedal 1102, and bolt 8 wears to establish in fourth through hole 1103 and third screw hole 14. From this structure to make limit sleeve 11 form the support as the switching can from the outside of shell fragment 501, bear the lateral force when plugboard 601 cuts into clamping assembly 5, because shell fragment 501 has elasticity, probably have elastic deformation after long-time use, the problem that whole clamping force reduces, consequently limit sleeve 11 has guaranteed with the help of bolt 8 that shell fragment 501 can have better clamping force, and plugboard 601's conduction effect is better.
In a preferred scheme, a through groove 1101 is arranged in the limit sleeve 11, and the cross section sizes of the through groove 1101 and the elastic piece 501 are matched. With this structure, the spacing sleeve 11 is convenient to assemble and disassemble, and the supporting stability of the elastic sheet 501 is good.
In a preferred embodiment, the ends of the two push plates 1102 are connected by a synchronization plate 1104. This configuration allows the synchronization plate 1104 to join the two push plates 1102 with greater ability to carry lateral forces.
In a preferred embodiment, the upper part of the limiting sleeve 11 is provided with a bevel 1105. With this structure, the inclined plane 1105 can facilitate the insertion and separation of the plug board 601, reduce friction resistance, and have good use effect and long service life.
The above embodiments are only preferred embodiments of the present utility model, and should not be construed as limiting the present utility model, and the scope of the present utility model should be defined by the claims, including the equivalents of the technical features in the claims. I.e., equivalent replacement modifications within the scope of this utility model are also within the scope of the utility model.
Claims (10)
1. A hydraulic generator excitation cable polarity switching device is characterized in that: including insulation board (1), the middle part symmetry of insulation board (1) is equipped with two movable contact plates (2), the both sides of movable contact plate (2) set up two first static contact plates (3) and second static contact plates (4) respectively at opposite angles, two first static contact plates (3) and two second static contact plates (4) are connected through switch-on board (7) respectively, be equipped with clamp assembly (5) on movable contact plate (2), first static contact plate (3) and second static contact plates (4) respectively, first static contact plate (3) and second static contact plates (4) structure are the same, the upside of movable contact plate (2) still is equipped with closing component (6), closing component (6) are including parallel arrangement's plugboard (601), plugboard (601) are articulated through bolt (8) and clamp assembly (5), detachable be connected with stay tube (10) between two bolts (8).
2. The hydraulic generator excitation cable polarity switching device according to claim 1, wherein: a fourth threaded hole (1001) is formed in the support tube (10) in a penetrating mode, and the bolt (8) is in threaded connection with the support tube (10).
3. The hydraulic generator excitation cable polarity switching device according to claim 2, wherein: the cross-section of the support tube (10) is hexagonal (1002).
4. The hydraulic generator excitation cable polarity switching device according to claim 1, wherein: the clamping assembly (5) comprises a fixed seat (503), a first through hole (504) is formed in the fixed seat (503), the fixed seat (503) is respectively and fixedly arranged on a movable contact plate (2), a first static contact plate (3) and a second static contact plate (4) through locking nails (15), a first threaded hole (201) is formed in the movable contact plate (2), a second threaded hole (13) is respectively formed in the first static contact plate (3) and the second static contact plate (4), two elastic sheets (501) are arranged on the fixed seat (503) in parallel, a second through hole (505) is formed in the elastic sheets (501), and a bolt (8) penetrates through the second through hole (505).
5. The hydraulic generator excitation cable polarity switching device according to claim 4, wherein: the middle part of shell fragment (501) is equipped with circular arc arch (502), and the bottom symmetry of plugboard (601) is equipped with thickening piece (604), is equipped with third through-hole (605) on thickening piece (604), is equipped with nut (9) between bolt (8) and stay tube (10), and two plugboards (601) are connected through locking plate (602), are equipped with handheld ring (603) on locking plate (602).
6. The hydraulic generator excitation cable polarity switching device according to claim 4, wherein: two first grooves (101) are symmetrically arranged in the middle of the insulating plate (1), two second grooves (102) are arranged on two sides of the first grooves (101) in parallel, avoiding grooves (103) are symmetrically arranged in the second grooves (102), the movable contact plate (2) is fixedly arranged in the first grooves (101), and the first static contact plate (3) and the second static contact plate (4) are respectively arranged in the second grooves (102).
7. The hydraulic generator excitation cable polarity switching device according to claim 6, wherein: the utility model discloses a high-precision electric power generation device, including first recess (102) and second recess (102), first static touch board (3) and second static touch board (4) are equipped with respectively in the outside symmetry in groove (103), epitaxial board (12) appearance and avoidance groove (103) assorted, be equipped with third screw hole (14) on epitaxial board (12), the upper portion cover of shell fragment (501) is equipped with spacing sleeve (11), the outside parallel of spacing sleeve (11) is equipped with two push pedal (1102), be equipped with fourth through-hole (1103) on push pedal (1102), bolt (8) wear to establish in fourth through-hole (1103) and third screw hole (14).
8. The hydraulic generator excitation cable polarity switching device according to claim 7, wherein: a through groove (1101) is formed in the limit sleeve (11), and the cross section sizes of the through groove (1101) and the elastic piece (501) are matched.
9. The hydraulic generator excitation cable polarity switching device according to claim 7, wherein: the ends of the two push plates (1102) are connected by a synchronization plate (1104).
10. The hydraulic generator excitation cable polarity switching device according to claim 8, wherein: an inclined plane (1105) is arranged at the upper part of the limit sleeve (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321015989.4U CN220043255U (en) | 2023-04-28 | 2023-04-28 | Polarity switching device for excitation cable of hydraulic generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321015989.4U CN220043255U (en) | 2023-04-28 | 2023-04-28 | Polarity switching device for excitation cable of hydraulic generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220043255U true CN220043255U (en) | 2023-11-17 |
Family
ID=88733359
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321015989.4U Active CN220043255U (en) | 2023-04-28 | 2023-04-28 | Polarity switching device for excitation cable of hydraulic generator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220043255U (en) |
-
2023
- 2023-04-28 CN CN202321015989.4U patent/CN220043255U/en active Active
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