CN202651942U - Insulation mechanism for random winding stator of large permanent magnetic wind power generator - Google Patents
Insulation mechanism for random winding stator of large permanent magnetic wind power generator Download PDFInfo
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- CN202651942U CN202651942U CN 201220238435 CN201220238435U CN202651942U CN 202651942 U CN202651942 U CN 202651942U CN 201220238435 CN201220238435 CN 201220238435 CN 201220238435 U CN201220238435 U CN 201220238435U CN 202651942 U CN202651942 U CN 202651942U
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Abstract
The utility model relates to an insulation mechanism for a random winding stator of a large permanent magnetic wind power generator. The insulation mechanism comprises an in-slot insulation component and an end insulation component, the in-slot insulation component comprises a slot wedge, a slot insulator, a slot base filler strip, a middle insulator and a random winding, the slot wedge is arranged at one end of the random winding, the random winding comprises an upper winding and a lower winding, the middle insulator is arranged between the upper winding and the lower winding, the slot insulator is arranged on the outer side of the random winding, and the slot base filler strip is arranged on the lower portion of the slot insulator. The end insulation component comprises an end alternate insulator, an end insulator, a binding rope, a soft end hoop and a winding end sealing part, the end alternate insulator is arranged between windings of generator ends, the end insulator wraps the outer sides of the windings, the winding end sealing part is arranged at a non-outlet end of the random winding, and the soft end hoop is bound on the outer side of the end insulator through the binding rope. Compared with the prior art, the insulation mechanism has the advantages of high corona resistance, fine insulating property, low dielectric loss, high dielectric strength and the like.
Description
Technical field
The utility model belongs to the electrical machine insulation field, especially relates to a kind of insulating mechanism for the loose embedding winding stator of large-scale permanent-magnetic wind driven generator.
Background technology
The development and utilization development of wind energy is very fast, and the application technology of wind power generation reaches its maturity.After the Fukushima, Japan nuclear power station event, Global Wind-power Market becomes new focus.
Development of Wind Power In China is rapid, and the main driver of development is from government's support and encouragement, existing and newly-built wind field increase in demand, the advantage of material cost.Along with dissolve the progressively solution of problem of the further lifting of wind-powered electricity generation economy and wind-electricity integration, under the strong backing of government policy, China will continue to lead the development of world's wind-powered electricity generation simultaneously.
Permanent-magnetic wind driven generator has can adapt to low wind speed, less energy intensive, follow-up maintenance low cost and other advantages.From comprehensive condition, three class wind districts of the low wind speed of China account for about 50% of whole wind energy resourceses, are more suitable for using permanent magnetism wind-powered electricity generation unit, therefore, as the key equipment of wind power generation, permanent-magnetic wind driven generator will be China's wind-driven generator development trend in future.
The winding configuration that generator, motor the most generally adopt at present has two kinds: moulding winding and loose embedding winding.Low voltage motor mainly uses loose embedding winding, and high-voltage motor mainly uses the moulding winding.Moulding winding welding point is many, easily produces weak spot; Aspect Motor Optimizing Design, because the wire gauge selection range is little, make prioritization scheme can not realize optimization.With the moulding ratio of winding, loose embedding winding has that cost is low, the fault point is few (pad is few), the wire gauge selection range is large, the easy advantage such as optimization of design.
External wind-powered electricity generation major company, for example: German ENERCON, Denmark: Vestas, Spain: the large-scale wind driven generator that the companies such as Gamesa make all has the case of using loose embedding winding, and the extensive use of loose embedding winding in wind-driven generator has been described.
As the most critical parts of wind power generation equipment, the development of wind-driven generator is particularly crucial, and motor reliability of operation and service life depend primarily on the design of insulation system and the application of material thereof.Because the special geological surrounding (Gobi desert, grassland, seashore etc.) that wind-driven generator uses, the used insulation system of wind-driven generator and insulating material thereof have specific (special) requirements, as shockproof, salt spray resistance and under the mechanical strength of low pressure, large electrical insulation structure and the insulation property decline that causes because of mechanical properties decrease and particular surroundings the weatherability problem etc. of operation insulation system.
The current transformer that large-scale wind driven generator uses generally is divided into two kinds: controlled rectification and uncontrollable rectification.Use uncontrollable rectification current transformer generating efficiency low.Use controlled rectification current transformer generating efficiency high, so the outer main flow wind-driven generator of Now Domestic is selected the controlled rectification current transformer, but use the controlled rectification current transformer can produce pulse spike voltage (2000V-2500V), under this voltage, corona phenomenon occurs easily.Corona produces the oxide of thermal effect and ozone, helium etc., makes that local temperature raises in the coil, causes that adhesive is rotten, carbonization, and strands insulation and mica bleach, and then makes that strand is loose, short circuit, ageing of insulation.In addition because heat cured insulation surface and cell wall loose contact or when unstable under the effect of electric and magnetic oscillation, will cause the sparkover of groove internal clearance.The local temperature rise that this sparkover causes will make insulating surface be subject to Eroded.Everything all will cause great infringement to electrical machine insulation.Large-scale wind driven generator uses the controlled rectification current transformer, will consider the corona problem that peaking voltage produces, this just requires the anticorona ability of insulation system to be eager to excel, just require specifically discharge inception voltage, the extinction voltage of insulation system will be higher than pulse spike voltage, just can not produce corona like this when peaking voltage, insulation system just can not be subjected to the infringement of corona.
Loose embedding winding does not relate to anticorona problem usually, but because we use the controlled rectification current transformer, we must consider anticorona problem with regard to needs.
The utility model content
The purpose of this utility model is exactly to provide in order to overcome the defective that above-mentioned prior art exists that a kind of anti-corona ability is strong, the insulating mechanism that is used for the loose embedding winding stator of large-scale permanent-magnetic wind driven generator of good insulation preformance.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of insulating mechanism for the loose embedding winding stator of large-scale permanent-magnetic wind driven generator comprises insulation assembly and overhang insulation assembly in the groove, wherein,
Insulation assembly in the groove: comprise slot wedge, slot liner, bottom land filler strip, intermediate insulation and loose rule winding, described slot wedge is located at an end of loose rule winding, described loose rule winding is made of upper winding and lower winding, described intermediate insulation is located between winding and the lower winding, described slot liner is located at the outside of loose rule winding, and described bottom land filler strip is located at the bottom of slot liner;
Overhang insulation assembly: comprise end phase insulation spare, overhang insulation, tie, soft end hoop and winding overhang seal, described end phase insulation spare is located between each winding of generator end, described overhang insulation is wrapped in the winding outside, described winding overhang seal is located at the non-leading-out terminal of loose rule winding, and described soft end hoop is through the outside of tie colligation at overhang insulation.
Described slot wedge is made by diphenyl ether D350 material and is obtained.
Described slot liner is made of two layers of polyimide film aromatic polyamide paper composite flexible material layer, is folded with five stratus master tapes between the composite layer.
Described bottom land filler strip is made by diphenyl ether D350 material and is obtained.
Described intermediate insulation is two layers of polyimide film aromatic polyamide paper composite flexible material or four strata imide membrane aromatic polyamide paper composite flexible materials.
Described loose rule winding is obtained by the 200 grades of enamelling cuprum round line of anti-corona coilings.
Described end phase insulation spare is made of two layers of polyimide film aromatic polyamide paper composite flexible material layer.
Described overhang insulation is made of half-stack package two stratus master tapes and one deck alkali-free glass fibre band, and the mica tape of stacked package is deep into slot liner end 15-20mm.
Described winding overhang seal is alkali-free glass fiber cloth, the external coating resin.
Described tie is the polyester fiber rope.
Described soft end hoop is the alkali-free glass fibre rope.
Compared with prior art, the utlity model has following advantage:
(1) discharge inception voltage, extinction voltage are higher than pulse spike voltage, can not produce corona when pulse spike voltage, and anti-corona ability is strong;
(2) the insulating material thermal endurance class is the H level, and heat resistance is good;
(3) insulation resistance is greater than 100G Ω, good insulation preformance;
(4) measuring media loss under 2500V voltage, less than 3%, dielectric loss is few;
(5) during voltage 10000V, one minute, insulation system did not have breakdown, and dielectric strength properties is good;
(6) wind-driven generator electric capacity is large, adopts DC High voltage tester (high direct voltage generator) to measure leakage current very little (μ A level);
When (7) satisfying specification requirement, cost is minimum.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of insulation assembly in the groove;
Fig. 3 is the structural representation of overhang insulation assembly.
Among the figure, 1 is that soft end hoop, 2 is end phase insulation spare for bottom land filler strip, 10 for lower winding, 9 for upper winding, 82 for loose rule winding, 81 for intermediate insulation, 8 for slot wedge, 7 for winding overhang seal, 6 for slot liner, 5 for overhang insulation, 4 for tie, 3.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Embodiment
A kind of insulating mechanism for the loose embedding winding stator of large-scale permanent-magnetic wind driven generator, its structure as Figure 1-3, comprise insulation assembly and overhang insulation assembly in the groove, wherein, insulation assembly comprises slot liner 4, bottom land filler strip 9, slot wedge 6, intermediate insulation 7 and loose rule winding 8 in the groove, slot wedge 6 is located at an end of loose rule winding 8, loose rule winding 8 is made of upper winding 81 and lower winding 82, intermediate insulation 7 is located between winding 81 and the lower winding 82, slot liner 4 is located at the outside of loose rule winding 8, and bottom land filler strip 9 is located at the bottom of slot liner 4.The overhang insulation assembly comprises end phase insulation spare 10, overhang insulation 3, tie 2, soft end hoop 1 and winding overhang seal 5, end phase insulation spare 10 is located between each winding of generator end, overhang insulation 3 is wrapped in the winding outside, winding overhang seal 5 is located at the non-leading-out terminal of loose rule winding 8, and soft end hoop 1 is through the outside of tie 2 colligations at overhang insulation 3.
Loose rule winding 8 is 200 grades of enamelling cuprum round line of anti-the corona, and slot liner 4 is made of two layers of polyimide film aromatic polyamide paper composite flexible material layer (NHN), and the bottom of slot liner 4 is provided with diphenyl ether D350 material and makes the bottom land filler strip 9 that obtains.Be folded with five stratus master tape intermediate insulations 7 between the composite layer and using two-layer NHN with alternate, between out-phase with four layers of NHN.Each winding overhang of end phase insulation spare 10 is with separating with 2 layers of NHN, and slot wedge 6 adopts diphenyl ether D350 (H level) to make and obtains.Winding overhang seal 11 is alkali-free glass fiber cloth, the external coating resin.Tie 2 is the polyester fiber rope.Soft end hoop 1 is the alkali-free glass fibre rope, and overhang insulation 3 is made of half-stack package two stratus master tapes and one deck alkali-free glass fibre band, and the mica tape of stacked package is deep into slot liner end 15-20mm.
The loose embedding winding explanation that the utility model adopts: enamelling cuprum round line, thermal level are 200 grades the paste paint film enamelling cuprum round line of anti-the corona, and nominal diameter is 1.2mm.
The insulating material explanation that the utility model adopts:
Polyimide film aromatic polyamide paper composite flexible material (being called for short NHN); Thick 0.2mm, thermal endurance class H level, withstand voltage 10000V.
H level and above (containing wind-powered electricity generation uses) vacuum pressure impregnation dry mica paper tape (anti-corona) (abbreviation mica tape): thick 0.14mm, thermal endurance class H level, withstand voltage 5000V.
The auxiliary material explanation that the utility model adopts:
Slot wedge: diphenyl ether D350, thermal endurance class H level.
Bottom land filler strip: diphenyl ether D350, thermal endurance class H level.
Insulation impregnating: VPI dipping H level solventless insulation resin twice cures twice.
The alkali-free glass fibre band: thick 0.2mm is used for the colligation of overhang insulation.
Polyester fiber rope: Φ 20 is used for end banding.
Alkali-free glass fibre rope: Φ 20, colligation winding terminal section.
Alkali-free glass fiber cloth: thick 0.2mm is used for the winding overhang sealing.
Winding external coating resin: be used for the winding overhang sealing.
During making, put into slot liner 4 front elder generations and put into the bottom land filler strip at bottom land.Slot liner 4 is pressed from both sides five stratus master tapes for two-layer NHN, and the glass cloth of mica tape is facing to winding; Layer insulation: with two layers of NHN of alternate usefulness, between out-phase with four layers of NHN.The winding both ends are half-stack package two stratus master tapes, one deck alkali-free glass fibre band (first stacked package mica tape) respectively, and each winding overhang separates with two layers of end phase insulation.Will go deep into 15-20mm in the slot liner end during stacked package mica tape, winding overhang must not be higher than the stator core internal diameter.Each winding overhang links to each other with the tie tighten.Soft end hoop with the colligation of alkali-free glass fibre rope in winding terminal section two circle and tight with the tie colligation.The non-outlet of winding end flat bag alkali-free glass fiber cloth (two-layer), and with winding external coating resin sticky tightly (in case missing impregnating varnish).VPI dipping H level solventless insulation resin twice cures twice.
Claims (9)
1. an insulating mechanism that is used for the loose embedding winding stator of large-scale permanent-magnetic wind driven generator is characterized in that, this insulating mechanism comprises insulation assembly and overhang insulation assembly in the groove, wherein,
Insulation assembly in the groove: comprise slot wedge, slot liner, bottom land filler strip, intermediate insulation and loose rule winding, described slot wedge is located at an end of loose rule winding, described loose rule winding is made of upper winding and lower winding, described intermediate insulation is located between winding and the lower winding, described slot liner is located at the outside of loose rule winding, and described bottom land filler strip is located at the bottom of slot liner;
Overhang insulation assembly: comprise end phase insulation spare, overhang insulation, tie, soft end hoop and winding overhang seal, described end phase insulation spare is located between each winding of generator end, described overhang insulation is wrapped in the winding outside, described winding overhang seal is located at the non-leading-out terminal of loose rule winding, and described soft end hoop is through the outside of tie colligation at overhang insulation.
2. a kind of insulating mechanism for the loose embedding winding stator of large-scale permanent-magnetic wind driven generator according to claim 1, it is characterized in that, described slot liner is made of two layers of polyimide film aromatic polyamide paper composite flexible material layer, is folded with five stratus master tapes between the composite layer.
3. a kind of insulating mechanism for the loose embedding winding stator of large-scale permanent-magnetic wind driven generator according to claim 1, it is characterized in that, described intermediate insulation is two layers of polyimide film aromatic polyamide paper composite flexible material layer or four strata imide membrane aromatic polyamide paper composite flexible material layers.
4. a kind of insulating mechanism for the loose embedding winding stator of large-scale permanent-magnetic wind driven generator according to claim 1 is characterized in that the winding that described loose rule winding is the 200 grades of enamelling cuprum round line of anti-corona coilings.
5. a kind of insulating mechanism for the loose embedding winding stator of large-scale permanent-magnetic wind driven generator according to claim 1 is characterized in that, described end phase insulation spare is two layers of polyimide film aromatic polyamide paper composite flexible material layer.
6. a kind of insulating mechanism for the loose embedding winding stator of large-scale permanent-magnetic wind driven generator according to claim 1, it is characterized in that, described overhang insulation is made of half-stack package two stratus master tapes and one deck alkali-free glass fibre band, and the mica tape of stacked package is deep into slot liner end 15-20mm.
7. a kind of insulating mechanism for the loose embedding winding stator of large-scale permanent-magnetic wind driven generator according to claim 1 is characterized in that, described winding overhang seal is alkali-free glass fiber cloth, the external coating resin bed.
8. a kind of insulating mechanism for the loose embedding winding stator of large-scale permanent-magnetic wind driven generator according to claim 1 is characterized in that, described tie is the polyester fiber rope.
9. a kind of insulating mechanism for the loose embedding winding stator of large-scale permanent-magnetic wind driven generator according to claim 1 is characterized in that, described soft end hoop is the alkali-free glass fibre rope.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220238435 CN202651942U (en) | 2012-05-23 | 2012-05-23 | Insulation mechanism for random winding stator of large permanent magnetic wind power generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220238435 CN202651942U (en) | 2012-05-23 | 2012-05-23 | Insulation mechanism for random winding stator of large permanent magnetic wind power generator |
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| CN202651942U true CN202651942U (en) | 2013-01-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220238435 Expired - Fee Related CN202651942U (en) | 2012-05-23 | 2012-05-23 | Insulation mechanism for random winding stator of large permanent magnetic wind power generator |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427523A (en) * | 2012-05-23 | 2013-12-04 | 上海万德风力发电股份有限公司 | Large and permanent magnet wind turbine generator scatteredly embedded winding stator insulation mechanism |
| CN104143891A (en) * | 2013-05-09 | 2014-11-12 | 上海电气集团上海电机厂有限公司 | Method for reducing heating temperature rise of ultra-high-speed permanent magnet synchronous motor |
| CN109483908A (en) * | 2018-11-26 | 2019-03-19 | 航天特种材料及工艺技术研究所 | A kind of compound material insulation end hoop and preparation method thereof |
-
2012
- 2012-05-23 CN CN 201220238435 patent/CN202651942U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103427523A (en) * | 2012-05-23 | 2013-12-04 | 上海万德风力发电股份有限公司 | Large and permanent magnet wind turbine generator scatteredly embedded winding stator insulation mechanism |
| CN104143891A (en) * | 2013-05-09 | 2014-11-12 | 上海电气集团上海电机厂有限公司 | Method for reducing heating temperature rise of ultra-high-speed permanent magnet synchronous motor |
| CN109483908A (en) * | 2018-11-26 | 2019-03-19 | 航天特种材料及工艺技术研究所 | A kind of compound material insulation end hoop and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20180523 |