CN201846163U - Fastening and reinforcing slot wedge for generator stator bar - Google Patents
Fastening and reinforcing slot wedge for generator stator bar Download PDFInfo
- Publication number
- CN201846163U CN201846163U CN201020604699XU CN201020604699U CN201846163U CN 201846163 U CN201846163 U CN 201846163U CN 201020604699X U CN201020604699X U CN 201020604699XU CN 201020604699 U CN201020604699 U CN 201020604699U CN 201846163 U CN201846163 U CN 201846163U
- Authority
- CN
- China
- Prior art keywords
- wedge
- slot wedge
- stator
- joint
- slot
- Prior art date
- 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
Links
Images
Landscapes
- Insulation, Fastening Of Motor, Generator Windings (AREA)
Abstract
The utility model relates to the technical field of generators, in particular to a fastening and reinforcing slot wedge for a generator stator bar, comprising hundreds of stator iron core slots dispersed at the inner edge of the stator iron core, stator bars arranged in the stator iron core slots, a semiconductor filler strip, a corrugated filler strip, upper segment stator slot wedges, middle segment stator slot wedges and lower segment stator slot wedges, and each stator slot wedge consists of an upper cover slot wedge and a lower inserting inclined wedge that are matched for use; the fastening and reinforcing slot wedge is characterized in that the quantity of the middle segment stator slot wedges is more than one time that of the generator of the same specification in the prior art, and the length of each middle segment stator slot is half that of the generator of the same specification in the prior art. The lower inserting inclined wedge is 5mm shorter than the upper cover slot wedge. The fastening and reinforcing slot wedge ensures the qualified installation tightness of the slot wedges, improves the assembling tightness of partial stator slot wedges with unqualified assembling tightness, reduces return working load of the stator slot wedge with unqualified assembling tightness, lowers return rate in tightening process and installation damage rate, promotes the slot wedge installation speed, and ensures the slot wedge installation quality.
Description
Technical field the utility model relates to technical field of generators, the fastening reinforcement slot wedge of particularly a kind of generator stator bar.
The background technology high-rating generator is in operation because stator slot wedge appears in slot wedge fixed effect missionary society, wedge and filler strip defective such as sink, come off in slot wedge and the groove.Stator slot wedge is one of persistent ailment of generator, particularly high-rating generator existence, also be power industry and the consistent for many years equipment deficiency of paying close attention to of motor manufacturing, a lot of units all drop into a large amount of research, the persistent ailment of stator slot wedge is eliminated in expectation, or prolongs the life cycle of stator slot wedge.Yet, do not find effective solution so far yet.
The generator installed of Liujiaxia hydropower plant initial stage is five units of technology manufacturing that Harbin Electric Machinery Plant adopts the initial stage in the sixties in succession the operation of putting into production in 1969 to 1975, the emerged in operation of decades many equipment breakdowns and defective.Though under the help of Harbin Electric Machinery Plant, Dongfang Electric Machinery Plant, carried out scrap build; But the stator core of generator part is not implemented to transform.Though stator slot wedge is frequent the replacing owing to become flexible, the structure of stator slot wedge has also carried out partly improving, and does not obtain desired effects.The loosening defective of the periodicity of slot wedge still occurs periodically repeatedly, can only be when the unit light maintenance filler strip under loosening slot wedge and the wedge carried out local repair or all change the stator slot wedge of units during at major overhaul and wedge under filler strip; In when maintenance, the frictional resistance of stator slot wedge stator slot wedge and iron core notch in urgent process, operation easier is big, and the rework rate and the stator slot wedge installation proportion of goods damageds are high.
In order to solve the loosening persistent ailment of stator slot wedge, professional and technical personnel's autonomous innovation of Liujiaxia hydropower plant a kind of large-scale vertical generator prevent the installation method of stator slot wedge.What present patent application was related is the reinforcement stator slot wedge of using in the method.
Utility model content the technical problems to be solved in the utility model is to provide a kind of effective raising slot wedge that tightness is installed, reduces frictional resistance between stator slot wedge and the iron core notch, reduces the fastening reinforcement slot wedge of generator stator bar that stator slot wedge is installed the proportion of goods damageds.
It is as follows that the utility model solves the problems of the technologies described above the technical scheme of taking: the fastening reinforcement slot wedge of a kind of generator stator bar, comprise hundreds of stator core slots that are dispersed in edge in the stator core, the stator bar of installing in each stator core slot, the semiconductor filler strip, the ripple filler strip, last joint stator slot wedge, middle joint stator slot wedge and following joint stator slot wedge, every kind of stator slot wedge comprises matching used loam cake slot wedge and following slotting wedge, it is characterized in that: the quantity of middle joint stator slot wedge is a times of prior art same specification generator, and the length of middle joint stator slot wedge is half of prior art same specification generator.
The length of slotting wedge is shorter 5 millimeters than loam cake slot wedge under the utility model.
With the 255MW vertical type generator is example, and the joint slot wedge is seven joints in the prior art, and middle joint slot wedge of the present utility model is 14 joints.
Generator stator bar relies on slot wedge to be fixed, middle joint slot wedge since its position at the middle part of stator, and quantity is many, bears the main task that stator bar compresses.Last joint slot wedge and lower segment groove wedge are except bearing the compressing the task of stator bar, also bearing the task that the joint slot wedge is scurried out in stopping, lower segment groove wedge particularly, last joint slot wedge and middle joint slot wedge all are pressed on the lower segment groove wedge, its task of stopping that the top slot wedge scurries out is heavier, therefore cooperates aspect requiring also the highest in the tightness of slot wedge.
Middle joint slot wedge is born the main task that compresses of stator bar, but the tightness standard of middle joint slot wedge in urgent operation is difficult the raising.Referring to Fig. 1: stator core 6 is made up of the silicon steel plate stacking that stamps out iron core slot 7, and slot wedge exists the big problem of frictional resistance of the frictional resistance of iron core notch 701 and stator slot wedge big and stator bar and stator slot wedge in urgent process.The anti-hammering intensity that adds stator slot wedge is limited, often occurs in the execute-in-place because of the stator slot wedge resistance is big, causes urgent difficulty of stator slot wedge and slot wedge head to beat heap and damages phenomenon.
The length dimension that the utility model will be installed the middle joint loam cake slot wedge of quantity maximum shorten to full-sized half.With the frictional resistance of joint loam cake slot wedge in urgent process in reducing effectively, and by saving the average thickness of loam cake slot wedge in increasing, reach joint loam cake slot wedge mechanical strength and anti-hammering intensity in the increase, compaction degree when improving the stator bar assembling reduces the purpose that operation easier, reduction slot wedge rework rate and the slot wedge of slot wedge in urgent process installed spoilage.
The utility model all shortens 5mm with inserting the length dimension of wedge length dimension ratio with the three kinds of loam cake slot wedges in upper, middle and lower of its pairing use under the three kinds of specifications in upper, middle and lower; Can will descend to insert wedge for the underproof stator slot wedge of assembling tightness pine and beat heavyly, can make down slotting wedge be lower than the maximum 5mm of loam cake slot wedge end face, thereby make the assembling tightness reinforcement of stator slot wedge.
The oblique slot wedge of our factory stator is used by loam cake slot wedge and down slotting wedge pairing, and the loam cake slot wedge is 1: 100 with the design gradient of following slotting wedge.That is: oblique slot wedge whenever moves down 1mm, and it is the amount of moving horizontally of 0.01mm that gradient will produce 1%.Slot wedge is in urgent operation, and following slotting wedge is whenever moved 1mm downwards, and the pairing slot wedge will produce the amount of moving horizontally of 2 * 0.01mm.The assembly technology of slot wedge requires not allow down the end of slotting wedge to exceed the end of loam cake slot wedge, misplaces to avoid matching slot wedge.Slot wedge the inappropriate situation of semiconductor filler strip thickness often occurs in urgent operation, the thick layer of semiconductor filler strip of a cushioning 0.02mm often occurs, the situation that slot wedge still can not get through even slot wedge is damaged.
The utility model will descend to insert wedge and shorten 5mm, and following slotting wedge just can advance 5mm more in the urgent operation, and stator bar can produce the amount of moving horizontally of 2 * 0.05mm (0.1mm).In the installation process of stator slot wedge, the amount of moving horizontally of this 0.1mm is extremely important to the installation tightness of slot wedge.After generator unit stator groove internal clearance was eliminated, the amount of moving horizontally of this 0.1mm had also just guaranteed the qualified of slot wedge installation tightness as the interference decrement of slot wedge.Thereby improve the assembling tightness that part is assembled the defective stator slot wedge of tightness, workload when the defective slot wedge of reduction assembling tightness is done over again, reduce rework rate and the slot wedge of slot wedge in urgent process spoilage is installed, improve the stator slot wedge installation rate, guarantee the slot wedge installation quality.
Description of drawings
Fig. 1 is the arrangement figure of electricity generator stator core groove,
Fig. 2 is that the fixing end face structure of generator unit stator slot wedge bonding concerns schematic diagram,
Fig. 3 is that the A-A cutaway view of Fig. 2 is a generator unit stator slot wedge axial arrangement schematic diagram,
Fig. 4 is loam cake slot wedge and the following qualified assembly relation schematic diagram of the concordant tightness in slotting wedge upper surface,
Fig. 5 is sunken to the qualified assembly relation schematic diagram of loam cake slot wedge tightness under the slotting wedge upper surface down.
Among the figure: 1-loam cake slot wedge, slotting wedge under the 2-, 3-ripple filler strip, 4-semiconductor filler strip, 5-stator bar, 6-stator core, 7-stator core slot, 701-iron core notch, the bonding glue-line of 8-, h-difference in height.
Embodiment is as shown in Figure 1 to Figure 3: the vertical type generator with 255MW is an example, the fastening reinforcement slot wedge of a kind of generator stator bar, comprise 540 stator core slots 7 that are dispersed in edge in the stator core 6, the stator bar of installing in each stator core slot 75, semiconductor filler strip 4, ripple filler strip 3, on save stator slot wedge, middle joint stator slot wedge and joint stator slot wedge down; Do not tell joint, middle joint among the figure, save down, because those skilled in the art will appreciate that respectively saving stator slot wedge mainly is the length difference; Every kind of stator slot wedge comprise matching used loam cake slot wedge 1 and slotting wedge 2 down (in other words, the stator slot wedge of each stator core slot 7 have matching used go up under joint loam cake slot wedge and the last joint in slotting wedge, the number joint in the joint loam cake slot wedge and number joint joint down slotting wedge, save slotting wedge under loam cake slot wedge and the joint down down); The quantity of middle joint stator slot wedge is 14 joints, is a times of prior art same specification generator.
The middle joint slot wedge of prior art 255MW vertical type generator is seven joints, and middle joint slot wedge of the present utility model is 14 joints.Last joint loam cake slot wedge is same as the prior art with the length that saves the loam cake slot wedge down; The length that promptly goes up joint loam cake slot wedge is 257mm, and the length of following joint loam cake slot wedge is 221mm, present embodiment with middle joint loam cake slot wedge length dimension shorten to full-sized half, originally middle to save loam cake slot wedge length be 228mm, now changes 114mm into; Like this, the former design of the every groove of stator core assembling nine joint slot wedges are promptly gone up a joint, in seven joints, next joint is changed into the every groove assembling of stator of the present utility model slot wedge and is increased to 16 joints, promptly go up one and save, in 14 save next joint.
The length dimension of slotting wedge ratio shortens 5mm with the length dimension of the three kinds of loam cake slot wedges in upper, middle and lower of its pairing use under the present embodiment; Promptly upward saving down, slotting wedge is 252mm; Middle joint slotting wedge down is 109mm; Following joint slotting wedge down is 216mm.
Referring to Fig. 4: for last joint and middle joint stator slot wedge, if after slotting wedge 2 was thrown into down, loam cake slot wedge 1 was concordant with the upper surface of following slotting wedge 2, loam cake slot wedge 1 forms difference in height h with the lower surface of following slotting wedge 2, stator slot wedge installation tightness is qualified, then stops to throw into;
Referring to Fig. 5: for last joint and middle joint stator slot wedge, after if slotting wedge is thrown into down, when loam cake slot wedge 1 is concordant with the upper surface of following slotting wedge 2, stator slot wedge is installed tightness and is not reached standard, then continue to throw into down slotting wedge 2, it is heavy that 2 times slotting wedges are beaten, and loam cake slot wedge 1 forms difference in height h with the upper surface of slotting wedge 2 down, slotting wedge is lower than 5mm at most than the upper surface of loam cake slot wedge down, thereby gives reinforcement for the stator slot wedge tightness.
Arrow among Fig. 4 and Fig. 5 is depicted as down the direction of throwing into of slotting wedge.
When slot wedge was decided in the prior art assembling, following slotting wedge all adopted urgent wedging technology from top to bottom.A kind of large-scale vertical generator of professional and technical personnel's innovation of Liujiaxia hydropower plant prevents the installation method of stator slot wedge, the change of slot wedge assemble sequence, according at first be the 14 the joint in save slot wedge, order then be the 13 the joint in save slot wedge, the 12 the joint in save slot wedge ..., second the joint in save save in slot wedge, the first segment slot wedge, on save slot wedge, the installation form that is other slot wedge remains unchanged, the stator slot wedge that is the lower segment groove wedge is at last installed urgent order, next joint down slotting wedge promptly down joint down slotting wedge change from bottom to top urgent technology into.Thereby, for saving down, after if slotting wedge is thrown under the following joint, when the lower surface of slotting wedge is concordant under saving the loam cake slot wedge down and saving down, stator slot wedge is installed tightness and is not reached standard, then continues to throw into down joint slotting wedge down, and it is heavy to descend under the joint slotting wedge to beat, following joint slotting wedge down is at most 5mm with the difference in height of the lower surface of joint loam cake slot wedge down, thus under save the stator slot wedge tightness and give reinforcement.
The loam cake slot wedge 1 of present embodiment and down slotting wedge 2 usefulness EPGC series of loops epoxy resins industry rigid layer platen manufacturing.
The slit is bigger between the fiberglass strand of EPGC series of loops epoxy resins industry rigid layer pressing plate, the epoxies glue soaks into fiberglass strand easily, has sheet material gel content height, the material continuity is good, avris layer tear resistance is strong, finisher tool intensity is good, and the density value advantages of higher is fit to the machine work moulding.Mechanical strengths such as its flexural strength, impact strength, course compressive strength all are higher than present other far away and are using material.
In order further effectively to prevent stator slot wedge, referring to Fig. 2 and Fig. 3: save, descend most the middle joint of joint and the loam cake slot wedge 1 of joint down and constitute bonding glue-line 8 with the happy safe 330 high viscosity structure bonded adhesivess of fitting surface brushing of slotting wedge 2 down last; Constitute bonding glue-line 8 at the last middle joint that saves, descends most joint with loam cake slot wedge 1 that saves down and the happy safe 330 high viscosity structure bonded adhesivess of the fitting surface brushing of iron core notch 701.
Claims (7)
1. fastening reinforcement slot wedge of generator stator bar, comprise hundreds of stator core slots that are dispersed in edge in the stator core, the stator bar of installing in each stator core slot, the semiconductor filler strip, the ripple filler strip, last joint stator slot wedge, middle joint stator slot wedge and following joint stator slot wedge, every kind of stator slot wedge comprises matching used loam cake slot wedge and following slotting wedge, it is characterized in that: the quantity that saves stator slot wedge in described is a times of prior art same specification generator, and the length of described middle joint stator slot wedge is half of prior art same specification generator.
2. the fastening reinforcement slot wedge of a kind of generator stator bar as claimed in claim 1 is characterized in that: the length of described slotting wedge down is than short 5 millimeters of described loam cake slot wedge.
3. the fastening reinforcement slot wedge of a kind of generator stator bar as claimed in claim 1 is characterized in that: described vertical type generator is the 255MW vertical type generator, and the quantity of described middle joint stator slot wedge is 14 joints, and the length of described middle joint stator slot wedge is 114 millimeters.
4. the fastening reinforcement slot wedge of a kind of generator stator bar as claimed in claim 3 is characterized in that: upward slotting wedge is 252 millimeters under the joint; Middle joint slotting wedge down is 109 millimeters; Following joint slotting wedge down is 216 millimeters.
5. as any fastening reinforcement slot wedge of described a kind of generator stator bar of claim 1 to 4, it is characterized in that: go up joint down slotting wedge concordant with the upper surface of last joint loam cake slot wedge or go up joint down slotting wedge be lower than 5 millimeters at most than the upper surface of last joint loam cake slot wedge; In joint down under slotting wedge and the concordant or middle joint in the upper surface of middle joint loam cake slot wedge slotting wedge than in the upper surface of joint loam cake slot wedge be lower than 5 millimeters at most; Following joint down slotting wedge concordant with the lower surface of joint loam cake slot wedge down or down joint down slotting wedge be at most 5 millimeters with the difference in height that saves the lower surface of loam cake slot wedge down.
6. the fastening reinforcement slot wedge of a kind of generator stator bar as claimed in claim 5 is characterized in that: loam cake slot wedge and down slotting wedge EPGC series of loops epoxy resins industry rigid layer platen manufacturing.
7. the fastening reinforcement slot wedge of a kind of generator stator bar as claimed in claim 6 is characterized in that: on save the loam cake slot wedge, descend the middle joint loam cake slot wedge of joint most, save the loam cake slot wedge down and be provided with bonding glue-line with the following fitting surface of slotting wedge; Fitting surface at last joint loam cake slot wedge, the middle joint loam cake slot wedge that descends joint most and following joint loam cake slot wedge and iron core notch is provided with bonding glue-line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020604699XU CN201846163U (en) | 2010-11-10 | 2010-11-10 | Fastening and reinforcing slot wedge for generator stator bar |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201020604699XU CN201846163U (en) | 2010-11-10 | 2010-11-10 | Fastening and reinforcing slot wedge for generator stator bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201846163U true CN201846163U (en) | 2011-05-25 |
Family
ID=44041039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201020604699XU Expired - Lifetime CN201846163U (en) | 2010-11-10 | 2010-11-10 | Fastening and reinforcing slot wedge for generator stator bar |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201846163U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723796A (en) * | 2012-07-02 | 2012-10-10 | 无锡市中达电机有限公司 | Stator punching piece for high voltage motor |
| CN103135040A (en) * | 2012-12-25 | 2013-06-05 | 太原理工大学 | High-voltage motor stator core slot part model device |
| CN108173372A (en) * | 2017-12-21 | 2018-06-15 | 上海电力学院 | A kind of stacked magnetic slot-seal |
-
2010
- 2010-11-10 CN CN201020604699XU patent/CN201846163U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102723796A (en) * | 2012-07-02 | 2012-10-10 | 无锡市中达电机有限公司 | Stator punching piece for high voltage motor |
| CN103135040A (en) * | 2012-12-25 | 2013-06-05 | 太原理工大学 | High-voltage motor stator core slot part model device |
| CN103135040B (en) * | 2012-12-25 | 2017-12-05 | 太原理工大学 | A kind of high-voltage motor stator core slot part model device |
| CN108173372A (en) * | 2017-12-21 | 2018-06-15 | 上海电力学院 | A kind of stacked magnetic slot-seal |
| CN108173372B (en) * | 2017-12-21 | 2020-06-26 | 上海电力学院 | Laminated magnetic slot wedge |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201846163U (en) | Fastening and reinforcing slot wedge for generator stator bar | |
| CN201918817U (en) | Looseness-preventing structure for stator slot wedges of large vertical generator | |
| CN101447720A (en) | Novel tri-power, efficient, energy-saving three-phase asynchronous motor used for oil extractor | |
| CN201821183U (en) | Permanent magnet fixing structure of permanent magnet generator or motor | |
| CN101399475A (en) | Brushless motor and manufacturing method thereof | |
| CN206023545U (en) | A kind of one side magnet steel linear electric motors | |
| CN101579839A (en) | Technology for completely grinding and quickly installing honing stone | |
| CN201428089Y (en) | Vacuum water absorbing box for making paper | |
| CN209266499U (en) | A kind of battery core mould group hold-down mechanism | |
| CN207660785U (en) | Blade of wind-driven generator and wind-driven generator including it | |
| CN201374598Y (en) | Novel three-power high-efficiency energy-saving three-phase asynchronous motor for pumping unit | |
| CN215150184U (en) | Combined mould suitable for producing exterior wall cladding component | |
| CN215470493U (en) | Permanent magnetic ferrite tile type product outer arc grinding guide rail bottom plate device | |
| CN219427027U (en) | Multi-connection multi-specification concrete mold capable of being fixed on vibrating table | |
| CN2904315Y (en) | Battery grid with artistic plate lug | |
| CN220475468U (en) | Novel motor punching sheet | |
| CN211429013U (en) | End plate riveting type stator for direct-driven wind driven generator | |
| CN217196399U (en) | Gravity type cleaning and sorting machine | |
| CN218987236U (en) | Engine packaging box for fumigating-free outlet | |
| CN204545918U (en) | The pearl frame of leading of Simple sliding rail kludge rotates transposer | |
| CN209753857U (en) | Spiral body manufacturing tool | |
| CN201940667U (en) | Milling device for pump shaft | |
| CN210730407U (en) | Tool for removing adhesive in adhesive injection pipe | |
| CN215467212U (en) | Hydraulic guide rail correcting device | |
| CN218886980U (en) | Moving and pressing mechanism of stay curtain of transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: STATE GRID CORPORATION OF CHINA Free format text: FORMER OWNER: LIUJIAXIA HYDRAULIC POWER PLANT, STATE GRID GANSU ELECTRIC POWER COMPANY Effective date: 20140306 Owner name: LIUJIAXIA HYDRAULIC POWER PLANT, STATE GRID GANSU Effective date: 20140306 |
|
| C56 | Change in the name or address of the patentee |
Owner name: LIUJIAXIA HYDRAULIC POWER PLANT, STATE GRID GANSU Free format text: FORMER NAME: GANSU ELECTRIC POWER CORPORATION, LIUJIAXIA HYDROPOWER PLANT |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 731600 LINXIA HUI AUTONOMOUS PREFECTURE, GANSU PROVINCE TO: 100031 XICHENG, BEIJING |
|
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Sichuan Road 731600 in Gansu County of Yongjing province Liujiaxia town No. 13 Patentee after: LIUJIAXIA HYDROPOWER PLANT, STATE GRID GANSU PROVINCE ELECTRIC POWER CO. Address before: Sichuan Road 731600 in Gansu County of Yongjing province Liujiaxia town No. 13 Patentee before: Liujiaxia Hydropower Plant, Gansu Electric Power Corp. |
|
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140306 Address after: 100031 Xicheng District West Chang'an Avenue, No. 86, Beijing Patentee after: State Grid Corporation of China Patentee after: LIUJIAXIA HYDROPOWER PLANT, STATE GRID GANSU PROVINCE ELECTRIC POWER CO. Address before: Sichuan Road 731600 in Gansu County of Yongjing province Liujiaxia town No. 13 Patentee before: LIUJIAXIA HYDROPOWER PLANT, STATE GRID GANSU PROVINCE ELECTRIC POWER CO. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110525 |