CN107425681A - Vertical hydrogenerator stator bar compressing method and device - Google Patents
Vertical hydrogenerator stator bar compressing method and device Download PDFInfo
- Publication number
- CN107425681A CN107425681A CN201710331465.9A CN201710331465A CN107425681A CN 107425681 A CN107425681 A CN 107425681A CN 201710331465 A CN201710331465 A CN 201710331465A CN 107425681 A CN107425681 A CN 107425681A
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- CN
- China
- Prior art keywords
- bar
- mat piece
- pressing device
- hold
- down bolt
- 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.)
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Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/06—Embedding prefabricated windings in machines
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0025—Shaping or compacting conductors or winding heads after the installation of the winding in the core or machine ; Applying fastening means on winding heads
Abstract
Present invention is disclosed a kind of vertical hydrogenerator stator bar compressing method and device, wherein, device includes spanner, compresses support, hold-down bolt and mat piece, and method includes 1) preparing pressing device；2) 130 epoxy low resistance semiconductor paints are sprayed in stator core bottom land, is then sequentially embedded lower floor's terylene felt bar, lower bar, mat piece, is compressed using pressing device, cancel pressure after lower floor's terylene felt bar fully solidifies, take out mat piece；4) industrial frequency AC pressure test is carried out, is entered in next step after qualified；5) upper strata terylene felt bar, top bar, mat piece are sequentially embedded on lower bar, is compressed using pressing device, terylene felt bar cancels pressure when upper strata after fully solidifying, and takes out mat piece.The apparatus structure of the present invention is simple, easy to operate, and method of the invention is to compress bar using pressing device, and introduces terylene felt bar, improves closeness of contact, reduces air gap.
Description
Technical field
Embodiments of the invention are related to vertical hydrogenerator stator bar compressing method and device.
Background technology
In capacity-increasing transformation or replacing vertical type generator stator bar compress work, traditional generator stator bar compresses
Method is that compression is beaten to bar using rubber hammer pad epoxidized block, and the method will damage the main insulating layer of bar, while also solve
Never between vertical type generator stator core bottom land and lower bar, and gap severe overweight is asked between upper and lower layer line rod
Topic, direct result is to cause generator unit stator internal poles to be also easy to produce corona discharge and galvano-cautery phenomenon occurs, and damages the master of bar
Occur alternate after insulating barrier or relatively puncture major accident, it is therefore necessary to which a kind of vertical hydrogenerator stator bar is provided
Pressing device compresses work preferably to complete bar.
The content of the invention
It is an object of the invention to for drawbacks described above of the prior art, there is provided and it is a kind of simple and easy, and effectively carry
Between high lower bar and stator core bottom land, and closeness of contact between upper and lower layer line rod, vertical hydrogenerator is fixed
Sub-line rod compressing method.
For achieving the above object, present invention employs following technical scheme：A kind of vertical hydrogenerator stator line
Rod compressing method, it comprises the following steps, 1) prepare pressing device：Pressing device include spanner, compress support, hold-down bolt,
And mat piece, the hold-down bolt are mutually threadedly coupled with compressing support；2) lower bar is compressed：Sprayed in stator core bottom land
130 epoxy low resistance semiconductor paints, lower floor's terylene felt bar, lower bar, mat piece are then sequentially embedded, support will be compressed with determining
Sub- iron core notch engaging, using spanner turn hold-down bolt, hold-down bolt is against mat piece and gradually applies balance thrust by lower floor
Bar is mobile to iron core slot bottom direction and is compacted, and cancels pressure after lower floor's terylene felt bar fully solidifies, takes out mat piece；4)
Industrial frequency AC pressure test is carried out, is entered in next step after qualified；5) top bar is compressed：Upper strata is sequentially embedded on lower bar
Terylene felt bar, top bar, mat piece, support will be compressed and engaged with stator core notch, utilize spanner turn hold-down bolt, pressure
Tight bolt is against mat piece and gradually applies balance thrust and is compacted top bar to the movement of iron core slot bottom direction, when upper strata is washed
Synthetic fibre felt bar cancels pressure after fully solidifying, take out mat piece.
The method of the present invention also provides following attached technical scheme：
Preferably, lower floor's terylene felt bar and upper strata terylene felt bar were impregnated with epoxy semi-conductor adhesive.
Compared to prior art, the advantage of method of the invention is：Bar is compressed using pressing device, and is being generated electricity
Between machine stator iron core slot bottom and lower bar, and terylene felt bar is set respectively between upper and lower layer line rod, it is tight to improve contact
Density, reduce air gap, galvano-cautery phenomenon occurs so as to avoid generation corona discharge inside generator unit stator, eliminates generator
Major safety risks existing for stator interior, it is ensured that generating equipment is reliably and securely run.
The present invention also provides a kind of vertical hydrogenerator stator bar pressing device, and it includes spanner, compresses support, pressure
Tight bolt and mat piece；The compression support engages with stator core notch, and the hold-down bolt is with compressing the mutual screw thread of support
Connect and stretch into stator core, the spanner is used to drive hold-down bolt to rotate, and the mat piece is arranged on bar with compressing spiral shell
Between bolt.
The device of the present invention also provides following attached technical scheme：
Preferably, spanner is torque spanner.
Preferably, compressing support includes whippletree and two connecting rods, and one and the hold-down bolt are set among whippletree
The screwed hole of matching, two connecting rods are located at the both ends of whippletree respectively, and the end of every connecting rod all sets a card body,
Card body engages with stator core notch.
Preferably, hold-down bolt includes outer-hexagonal head, full wire screw rod and iron block, and outer-hexagonal head and iron block are located at respectively
The both ends of full wire screw rod, full wire screw rod are mutually threadedly coupled with compressing support.
Preferably, mat piece includes conformal iron mat piece and conformal epoxy mat piece, and conformal iron mat piece contacts with hold-down bolt, described
Epoxy mat piece is adapted to contact with bar.
Preferably, conformal iron mat piece is provided with anti-skid design, the conformal ring with the contact surface that conformal epoxy mat piece contacts
The two sides of oxygen mat piece is provided with anti-skid design.
Compared to prior art, the advantage of device of the invention is：It is simple in construction, it is easy to operate, can be safely, effectively
Ground is solved between electricity generator stator core bottom land and lower bar, and loose contact or has asking for air gap between upper and lower layer line rod
Topic.
Brief description of the drawings
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be in embodiment or description of Related Art
The required accompanying drawing used is briefly described, it should be apparent that, drawings in the following description merely relate to some of the present invention
Embodiment, not limitation of the present invention.
Fig. 1 is the assembling schematic diagram of the vertical hydrogenerator stator bar pressing device of the present invention, and what this was illustrated is
Press lower bar.
Fig. 2 is the structural representation of hold-down bolt.
Fig. 3 is the structural representation of conformal iron mat piece.
Embodiment
It is below in conjunction with the accompanying drawings and specific real in order to be more clearly understood that the above objects, features and advantages of the present invention
Apply mode and make further nonrestrictive detailed description to technical solution of the present invention.
See Fig. 1, the vertical hydrogenerator stator bar pressing device of the present embodiment mainly includes spanner 1, hold-down bolt
2nd, support 3, conformal iron mat piece 5 and conformal epoxy mat piece 6 are compressed.
Spanner 1 is torque spanner, and it is manual torque spanner further to limit.Torque spanner is taken to apply equal pressure
Power, it can be read from dial plate, it is simple to operate, while can avoid applying stressed blindness using other modes.
It is in shaped door to compress support 3, it includes whippletree and two connecting rods, and one and hold-down bolt 2 are set among whippletree
The screwed hole being mutually matched, two connecting rods are located at the both ends of whippletree respectively, and the end of every connecting rod all sets one
Card body 3a.After insertion 4 notch of iron core of support 3 is compressed, two card body 3a engage with stator core notch (dovetail groove) respectively.
See Fig. 2, hold-down bolt 2 includes outer-hexagonal head 2a, full wire screw rod 2b and iron block 2c, outer-hexagonal head 2a and iron block
2c is located at full wire screw rod 2b both ends respectively, and full wire screw rod 2b is mutually threadedly coupled with the screwed hole of above-mentioned compression support 3, iron
Block 2c is used to increase hold-down bolt 2 and the contact area of conformal iron mat piece 5, makes its stress evenly.
Conformal iron mat piece 5 contacts with hold-down bolt 2, adapts to epoxy mat piece 6 and is arranged between conformal iron mat piece 5 and bar 7,
Bar 7 is avoided to be impacted by hardness and damage external insulation.Because stator core slot is vertically extending, so in order to prevent
Mat piece slides, and improves operating efficiency, and the contact surface that conformal iron mat piece 5 is in contact with conformal epoxy mat piece 6 is provided with anti-skid design
50, the two sides of conformal epoxy mat piece 5 is provided with anti-skid design (not shown).
Based on above-mentioned pressing device, the present invention also provides a kind of compressing method, comprised the following steps,
1) above-mentioned pressing device is got out.Because the length of stator core slot is longer, compressed so several sets should be prepared more
Device, along stator core slot equidistant arrangement during installation.
2) lower bar is pressed：130 epoxy low resistance semiconductor paints are sprayed in stator core trench bottom first, then in bottom land pad
One lower floor terylene felt bar 10 for being impregnated with epoxy semi-conductor adhesive and having dried suitable with slot length, is then sequentially embedded
Lower bar 11, conformal epoxy mat piece, conformal iron filler strip；Above-mentioned hold-down bolt is installed and compresses support, hold-down bolt holds out against suitable
Shape iron filler strip, rotating spanner tighten hold-down bolt, gradually apply balance thrust to conformal iron filler strip, and lower bar is uniform, flat
Quietly compressed to the movement of iron core slot bottom direction, by precompressed, compression, compacting, and every time, compression interval time is identical, until
Be impregnated with epoxy semi-conductor adhesive lower floor's terylene felt bar fully solidify after just unclamp pressing device, cancel pressure.Due to stator iron
The length of core groove is longer, it is possible to takes and respectively installs a set of pressing device in three positions of upper, middle and lower and compressed.This step
Conformal epoxy mat piece can use bulk, quantity can suitably increase.
3) industrial frequency AC pressure test is carried out, is carried out in next step after qualified.
4) top bar is pressed：First outside lower bar on pad one suitable with slot length be impregnated with epoxy semi-conductor adhesive
And the upper strata terylene felt bar dried, is then sequentially embedded top bar, conformal epoxy mat piece (strip), conformal iron pad
Bar；Above-mentioned hold-down bolt is installed and compresses support, hold-down bolt holds out against conformal iron filler strip, and rotating spanner tightens hold-down bolt, right
Conformal iron filler strip gradually applies balance thrust, and top bar uniformly, is smoothly compressed to the movement of iron core slot bottom direction, passed through
Precompressed, compression, compacting, and compression interval time is identical every time, until being impregnated with the upper strata terylene felt bar of epoxy semi-conductor adhesive
Pressing device is just fully unclamped after solidification, cancels pressure.Similarly, because the length of stator core slot is longer, it is possible to adopt
Take and a set of pressing device is respectively installed in three positions of upper, middle and lower compressed.The conformal epoxy mat piece of this step can use bar
Shape.
The preload pressure of this method should not be excessive, and the epoxy semi-conductor adhesive or insulated paint for avoiding the conformal felt of terylene are extruded
And fail.
The pressing device of the present invention is simple in construction, easy to operate；The compressing method emphasis of the present invention is to utilize pressing device
Bar is compressed, and between electricity generator stator core bottom land and lower bar, and terylene is set respectively between upper and lower layer line rod
Felt bar, closeness of contact is improved, reduce air gap, electricity occurs so as to avoid generation corona discharge inside generator unit stator
Corrosion phenomenon, eliminate major safety risks existing for inside generator unit stator, it is ensured that generating equipment is reliably and securely run.
It is pointed out that the technical concepts and features of above-mentioned preferred embodiment only to illustrate the invention, its object is to
Allow person skilled in the art to understand present disclosure and implement according to this, the protection of the present invention can not be limited with this
Scope.Any equivalent change or modification in accordance with the spirit of the invention, it should all be included within the scope of the present invention.
Claims (8)
- A kind of 1. vertical hydrogenerator stator bar compressing method, it is characterised in that：Comprise the following steps,1) pressing device is prepared：Pressing device all includes spanner, compresses support, hold-down bolt and mat piece, the hold-down bolt Mutually it is threadedly coupled with compressing support；2) lower bar is compressed：130 epoxy low resistance semiconductor paints are sprayed in stator core bottom land, are then sequentially embedded lower floor's terylene Felt bar, lower bar, mat piece, support will be compressed and engaged with stator core notch, using spanner turn hold-down bolt, compress spiral shell Bolt against mat piece and gradually applies balance thrust, and lower bar is mobile to iron core slot bottom direction and be compacted, when lower floor's terylene hair Felt rug cancels pressure after fully solidifying, take out mat piece；4) industrial frequency AC pressure test is carried out, is entered in next step after qualified；5) top bar is compressed：Upper strata terylene felt bar, top bar, mat piece are sequentially embedded on lower bar, branch will be compressed Frame engages with stator core notch, and using spanner turn hold-down bolt, hold-down bolt against mat piece and gradually applies balance thrust Top bar is compacted to the movement of iron core slot bottom direction, when upper strata, terylene felt bar cancels pressure after fully solidifying, and takes out Mat piece.
- 2. vertical hydrogenerator stator bar compressing method according to claim 1, it is characterised in that：The lower floor washs Synthetic fibre felt bar and the upper strata terylene felt bar were impregnated with epoxy semi-conductor adhesive.
- 3. the pressing device of vertical hydrogenerator stator bar compressing method according to claim 1, it is characterised in that： It includes spanner, compresses support, hold-down bolt and mat piece；The compression support engages with stator core notch, the compression Bolt is mutually threadedly coupled and stretched into stator core with compressing support, and the spanner is used to drive hold-down bolt to rotate, described Mat piece is arranged between bar and hold-down bolt.
- 4. vertical hydrogenerator stator bar pressing device according to claim 3, it is characterised in that：The spanner is Torque spanner.
- 5. vertical hydrogenerator stator bar pressing device according to claim 3, it is characterised in that：It is described to compress branch Frame includes whippletree and two connecting rods, and a screwed hole matched with the hold-down bolt, two connections are set among whippletree Bar is located at the both ends of whippletree respectively, and the end of every connecting rod all sets a card body, card body and stator core notch card Close.
- 6. vertical hydrogenerator stator bar pressing device according to claim 3, it is characterised in that：The compression spiral shell Bolt includes outer-hexagonal head, full wire screw rod and iron block, and outer-hexagonal head and iron block are located at the both ends of full wire screw rod, full wire spiral shell respectively Bar is mutually threadedly coupled with compressing support.
- 7. vertical hydrogenerator stator bar pressing device according to claim 3, it is characterised in that：The mat piece bag Conformal iron mat piece and conformal epoxy mat piece are included, the conformal iron mat piece contacts with the hold-down bolt, the adaptation epoxy mat piece Contacted with bar.
- 8. vertical hydrogenerator stator bar pressing device according to claim 3, it is characterised in that：The conformal iron Mat piece is provided with anti-skid design with the contact surface that the conformal epoxy mat piece contacts, and the two sides of the conformal epoxy mat piece is respectively provided with There is anti-skid design.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710331465.9A CN107425681A (en) | 2017-05-11 | 2017-05-11 | Vertical hydrogenerator stator bar compressing method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710331465.9A CN107425681A (en) | 2017-05-11 | 2017-05-11 | Vertical hydrogenerator stator bar compressing method and device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107425681A true CN107425681A (en) | 2017-12-01 |
Family
ID=60424954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710331465.9A Pending CN107425681A (en) | 2017-05-11 | 2017-05-11 | Vertical hydrogenerator stator bar compressing method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107425681A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142132A (en) * | 1995-06-08 | 1997-02-05 | Abb管理有限公司 | Slot-wedge pressing device for rotating motor |
| CN202103549U (en) * | 2011-05-19 | 2012-01-04 | 天津市天发重型水电设备制造有限公司 | Portable stator coil inserting device for hydraulic generator |
| CN205566044U (en) * | 2016-04-19 | 2016-09-07 | 南京汽轮电机(集团)有限责任公司 | Compress tightly line stick frock of online inslot |
-
2017
- 2017-05-11 CN CN201710331465.9A patent/CN107425681A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1142132A (en) * | 1995-06-08 | 1997-02-05 | Abb管理有限公司 | Slot-wedge pressing device for rotating motor |
| CN202103549U (en) * | 2011-05-19 | 2012-01-04 | 天津市天发重型水电设备制造有限公司 | Portable stator coil inserting device for hydraulic generator |
| CN205566044U (en) * | 2016-04-19 | 2016-09-07 | 南京汽轮电机(集团)有限责任公司 | Compress tightly line stick frock of online inslot |
Non-Patent Citations (4)
| Title |
|---|
| 彭贵军: "定子下线施工工艺及质量控制要点", 《水电站机电技术》 * |
| 徐海林: "新疆001工程发电机定子下线工艺综述", 《水电站机电技术》 * |
| 杨运喜: "三峡左岸电站VGS机组定子下线工艺", 《水电站机电技术》 * |
| 邓栋文: "浅谈发电机定子线棒安装工艺", 《四川水力发电》 * |
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