CN102946168A - Lightning protection device for main bearing of generator of permanent magnet direct-drive wind generating set - Google Patents
Lightning protection device for main bearing of generator of permanent magnet direct-drive wind generating set Download PDFInfo
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- CN102946168A CN102946168A CN2012104723072A CN201210472307A CN102946168A CN 102946168 A CN102946168 A CN 102946168A CN 2012104723072 A CN2012104723072 A CN 2012104723072A CN 201210472307 A CN201210472307 A CN 201210472307A CN 102946168 A CN102946168 A CN 102946168A
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- protection device
- slip ring
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- 238000009413 insulation Methods 0.000 claims description 35
- 238000007599 discharging Methods 0.000 claims description 10
- 239000000428 dust Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 6
- 229920001778 nylon Polymers 0.000 claims description 6
- 229920000647 polyepoxide Polymers 0.000 claims description 6
- 239000012634 fragment Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 3
- 230000006378 damage Effects 0.000 description 5
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 229910001339 C alloy Inorganic materials 0.000 description 2
- 229910000881 Cu alloy Inorganic materials 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 2
- 230000001771 impaired effect Effects 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 229910052698 phosphorus Inorganic materials 0.000 description 1
- 239000011574 phosphorus Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000002633 protecting effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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Abstract
The invention provides a lightning protection device for a main bearing of a generator of a permanent magnet direct-drive wind generating set. According to the permanent magnet direct-drive wind generating set, the independent lightning current discharge channel is established without passing through the main bearing of the generator, so that the normal operation of the main bearing of the generator is effectively ensured, the service life of the main bearing of the generator is prolonged, the normal operation of the permanent magnet direct-drive wind generating set is ensured, the fault rate of the permanent magnet direct-drive wind generating set is reduced, and the generating efficiency of the permanent magnet direct-drive wind generating set is improved. In addition, the permanent magnet direct-drive wind generating set establishes an independent lightning current leakage channel, so that the electric conductivity of a lightning current leakage path is obviously improved.
Description
Technical field
The present invention relates to a kind of lightning protection device, more particularly, relate to a kind of base bearing impaired lightning protection device in lightning stroke process that prevents the generator of permanent magnet direct-driving aerogenerator group.
Background technology
The permanent magnet direct-driving aerogenerator group usually is installed in spacious area or thunderstorm compares more frequently coastal area.Because the permanent magnet direct-driving aerogenerator group belongs to the object of projection, so be struck by lightning easily.The base bearing of the generator of permanent magnet direct-driving aerogenerator group is carrying the weight of impeller and generator, when being struck by lightning, the base bearing of generator is also as the only way which must be passed of lightning current, in this case, if the base bearing of generator is damaged, then can affect the operation of whole permanent magnet direct-driving aerogenerator group when being struck by lightning.
Specifically, at present, most of permanent magnet direct-driving aerogenerator group utilizes the metal partss such as wheel hub, generator, base bearing, engine room foundation as the lightning current path, but uses above-mentioned metal parts to be as the shortcoming of lightning current path: contact resistance is large, the lightning current circulation is not smooth.In addition, owing to the metal object moment temperature rise of being hit by lightning current is too high, can cause the fusing of lightning strike spot localized metallic.Usually, serious thunderbolt thermal effect can appear at has relatively high-resistance place on the lightning current path, and for example, between the lasso and roller of the base bearing of generator, particularly in their relative motions, the situation of the damage that causes is the most serious.After the permanent magnet direct-driving aerogenerator group was struck by lightning, the flow through outer collar of base bearing of generator of lightning current punctured the gap between outer collar and the roller, makes arc discharge, to the roller injury, thereby damages base bearing.
In addition, the mode that present also some permanent magnet direct-driving aerogenerator group is connected with slip ring with downlead with lightning protection gets around the base bearing of generator, thereby at the base bearing that is suffering thunderstorm hour protection generator.But, there is following shortcoming in the base bearing that the mode that is connected with slip ring with downlead with above-mentioned lightning protection gets around generator: this mode can only be installed in lightning protection the middle part of dead axle with slip ring, because the permanent magnet direct-driving aerogenerator group is having the class signal slip ring to guarantee electric equipment signal transmission between wheel hub and the cabin on this position, will certainly cause interference to the rotating parts that original slip ring connects so extra slip-ring device is installed.And if a part that adopts the signal slip ring not only can not guarantee releasing fully of thunder energy as lightning channel, and can produce serious electromagnetic interference to the ambient signals passage, even also can damage slip ring.
Summary of the invention
In order to solve base bearing impaired problem in lightning stroke process of existing permanent magnet direct-driving aerogenerator group, the present invention proposes a kind of lightning protection device, and the lightning current leakage path prevents from base bearing is caused damage described lightning protection device by setting up independently.
Exemplary embodiment of the present invention provides a kind of lightning protection device of base bearing of generator of permanent magnet direct-driving aerogenerator group, and described lightning protection device comprises the circular orbit on the dead axle that is arranged on generator and the lightning protection brush that can slide at circular orbit.
Exemplary embodiment of the present invention, described circular orbit can be arranged on the brake base on the dead axle that is fixed in generator, and described circular orbit and the insulation of described brake base.
Exemplary embodiment of the present invention can arrange the circular orbit insulation board on brake base, described circular orbit is arranged on the described circular orbit insulation board, thereby described circular orbit is by described circular orbit insulation board and the insulation of described brake base.
Exemplary embodiment of the present invention, described circular orbit can be made by stainless steel.
Exemplary embodiment of the present invention, described circular orbit insulation board can be made by epoxy resin or nylon.
Exemplary embodiment of the present invention, described permanent magnet direct-driving aerogenerator group can comprise slip ring shift fork, slip ring rocking arm and slip ring, one end of slip ring shift fork is fixed on the rotation axis, the other end of slip ring shift fork is connected with the slip ring rocking arm, the slip ring rocking arm is connected with the body of slip ring, so that the rotating part of slip ring rotates with the rotation of generator, described lightning protection device also can comprise the brush carriage that is arranged on the slip ring shift fork, the lightning protection brush is fixed on the end of described brush carriage, and described brush carriage and the insulation of described slip ring shift fork.
Exemplary embodiment of the present invention can arrange the brush carriage insulation board on the slip ring shift fork, described brush carriage is arranged on the described brush carriage insulation board, thereby described lightning protection brush is by described brush carriage insulation board and the insulation of described slip ring shift fork.
Exemplary embodiment of the present invention, described lightning protection brush can be two, described two lightning protection brushes are separately fixed at the two ends of described brush carriage.
Exemplary embodiment of the present invention, described brush carriage insulation board can be made by epoxy resin or nylon.
Exemplary embodiment of the present invention, described lightning protection brush can comprise that be used to the shell fragment and the discharging gap spare that make lightning protection brush and circular orbit close contact described discharging gap spare is spaced a predetermined distance from circular orbit.
Exemplary embodiment of the present invention, the diameter of described circular orbit can be greater than the diameter of described slip ring, so that described circular orbit and slip ring separate.
Exemplary embodiment of the present invention, described lightning protection device also can comprise for the dust-collecting box of collecting the dust that process that the lightning protection brush slides at circular orbit produces.
Exemplary embodiment of the present invention, described dust-collecting box can comprise inside and outside dust-collecting box and dust-collecting box lid, the internal-and external diameter with circular orbit is identical respectively for the diameter of described inside and outside dust-collecting box, thereby circular orbit and lightning protection brush are surrounded, described dust-collecting box lid is arranged on the outside of lightning protection brush, the shape of described dust-collecting box lid is corresponding with the shape of described circular orbit, and described dust-collecting box lid slides at circular orbit with the lightning protection brush.
Exemplary embodiment of the present invention can arrange seal between dust-collecting box lid and inside and outside dust-collecting box, with the dust diffusion that prevents that the thunder-lightning brush from producing in sliding process.
Permanent magnet direct-driving aerogenerator group according to the present invention is by setting up lightning current leakage path independently and without the base bearing of generator, thereby effectively guarantee the normal operation of the base bearing of generator, prolonged the useful life of the base bearing of generator, thereby guarantee the normal operation of permanent magnet direct-driving aerogenerator group, reduce the failure rate of permanent magnet direct-driving aerogenerator group, also improved the generating efficiency of permanent magnet direct-driving aerogenerator group simultaneously.In addition, found independently lightning current leakage path owing to set up according to permanent magnet direct-driving aerogenerator according to the present invention, so significantly improved the release electrically conducting of path of lightning current.
Description of drawings
By the description of exemplary embodiment being carried out below in conjunction with accompanying drawing, it is clear and easier to understand that these and/or other aspect of the present invention will become, in the accompanying drawings:
Fig. 1 is the front view that illustrates according to the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention;
Fig. 2 is the end view that illustrates according to the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention;
Fig. 3 is the front view that illustrates according to the lightning protection brush of the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention;
Fig. 4 is the vertical view that illustrates according to the lightning protection brush of the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention.
Embodiment
Below, describe with reference to the accompanying drawings exemplary embodiment of the present invention in detail.Yet the present invention can implement with multiple different form, and should not be construed as be limited to exemplary embodiments set forth herein.In the accompanying drawings, for the sake of clarity, may exaggerate the size of parts, and identical label is indicated identical parts all the time.
Fig. 1 is the front view that illustrates according to the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention, and Fig. 2 is the end view that illustrates according to the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention.
As shown in Fig. 1 and Fig. 2, comprise the circular orbit 2 on the dead axle 1 that is arranged on generator and the lightning protection brush 3 that can slide at circular orbit 2 according to the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention.
Specifically, can circular orbit insulation board 5 be set the brake base 4 on the dead axle 1 that is fixed in generator, circular orbit 2 can be arranged on the circular orbit insulation board 5.Alternatively, circular orbit 2 can be made by stainless steel; Circular orbit insulation board 5 can be made by epoxy resin, nylon or other suitable insulating material.
Although in this exemplary embodiment, circular orbit 2 is arranged on the brake base 4 on the dead axle 1 that is fixed in generator, and make circular orbit 2 and dead axle 1 insulation by circular orbit insulation board 5, but the invention is not restricted to this, circular orbit 2 can be arranged on the dead axle 1 and with dead axle 1 by other fixtures and insulate.
Alternatively, circular orbit 2 can be provided with parts with the cable termination sub-connection near cabins one side, arrange on the described parts porose, with by securing member (for example, bolt) the connection wire with circular orbit 2 fixes, and connects the lead-out wire from engine room inside again.
Permanent magnet direct-driving aerogenerator group according to the present invention comprises slip ring shift fork 6, slip ring rocking arm 8 and slip ring 9.One end of slip ring shift fork 6 is fixed on the rotation axis 7, and the other end of slip ring shift fork 6 is connected with slip ring rocking arm 8, and slip ring rocking arm 8 is connected with the body of slip ring 9, thereby the rotating part of slip ring 9 is rotated with the rotation of generator.Wherein, slip ring 9 arranges coaxially with dead axle 1.At slip ring shift fork 6 brush carriage insulation board 10 is set, brush carriage insulation board 10 can be made by epoxy resin, nylon or other suitable insulating material.Fixed brush support 11 on brush carriage insulation board 10, lightning protection brush 3 can be fixed on the end of brush carriage 11, and in the present embodiment, lightning protection brush 3 can be two, is separately fixed at the two ends of brush carriage 11.
Although in this exemplary embodiment, lightning protection brush 3 is arranged on the brush carriage 11 that is fixed on the slip ring shift fork 6, and make lightning protection brush 3 and rotation axis 7 insulation by brush carriage insulation board 10, but the invention is not restricted to this, lightning protection brush 3 can be arranged on the rotation axis 7 and with rotation axis 7 by other fixtures and insulate.
In the present embodiment, slip ring 9 is installed in the middle part of brake base 4, according to the size of slip ring 9, circular orbit 2 can not design too smallly, conflicts with the body of slip ring 9 avoiding, namely, the diameter of circular orbit 2 is greater than the diameter of slip ring 9, thereby circular orbit 2 is spaced a predetermined distance from slip ring 9.
Alternatively, arrange on slip ring shift fork 6 and the brush carriage 11 porose, to connect the lead-in wire from three blades.For fixing cable of drawing from blade, can increase more than at least 3 places and can pass the hole of binding strap at slip ring shift fork 6, to guarantee the fixing of cable.
When the permanent magnet direct-driving aerogenerator group meets with thunderbolt, lightning current can conduct to circular orbit 2 via track lead-out wire 12 along the blade downlead, then, contacting lightning current with dynamic friction between the lightning protection brush 3 by circular orbit 2 is lightning protection device in the tower cylinder along the cabin that brush lead-out wire 13 is sent to the permanent magnet direct-driving aerogenerator group, enters at last the earth again.
Fig. 3 is the front view that illustrates according to the lightning protection brush of the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention, and Fig. 4 is the vertical view that illustrates according to the lightning protection brush of the lightning protection device of the base bearing of the generator of the permanent magnet direct-driving aerogenerator group of exemplary embodiment of the present invention.
As shown in Fig. 3 and Fig. 4, lightning protection brush 3 comprises shell fragment 31 and discharging gap spare 32.The reason that discharging gap spare 32 is set is: in use, wearing and tearing can appear in lightning protection brush 3, so that shell fragment 31 lost its bounces of lightning protection brush 3, thereby deficiency makes the blocking-up of lightning current path so that thunder-lightning brush 3 space occurs with circular orbit 2 close contacts.Occur for fear of this situation, at lightning protection brush 3 profile of tooth discharging gap spare 32 is set, this profile of tooth discharging gap spare 32 does not contact with circular orbit 2 but is spaced a predetermined distance from circular orbit 2.When between the lightning protection device of the base bearing of the generator of permanent magnet direct-driving aerogenerator group is owing to lightning protection brush 3 and circular orbit 2, existing the space to make the blocking-up of lightning current path; this profile of tooth discharging gap spare 32 plays the redundancy protecting effect, so that described lightning protection device is still effective.In addition, the increase of discharging gap spare 32 also can increase the discharge channel of lightning current, improves the release ability of lightning current of lightning protection brush 3 integral body.
In addition, in the situation about moving in the permanent magnet direct-driving aerogenerator group leader phase, the lightning protection brush 3 of the lightning protection device of base bearing can constantly produce dust, and these dust may enter in electrical control cubicles, oil nozzle or the base bearing, thereby the permanent magnet direct-driving aerogenerator group is broken down.In order to address the above problem, lightning protection brush 3 is carried out following improvement: the first, the diameter of sliding rail 2 arranges littlely as required, in this case, because the rotating speed of generator is constant, so reduce the linear velocity of lightning protection brush 3, thereby reduce as far as possible the dust that lightning protection brush 3 produces.The second, lightning protection brush 3 uses the lower material of phosphorus content to make as far as possible, for example, can use copper and carbon alloy to make lightning protection brush 3, because use lightning protection brush 3 copper contents of copper and carbon alloy manufacturing more than 80%, resistance to wear is very good, thereby the powder that produces is few, and long service life.Three, dust-collecting box 14 (seeing Fig. 2) is set, dust-collecting box 14 is the assembly unit loop configuration, comprises inside and outside dust-collecting box and dust-collecting box lid.The internal-and external diameter with circular orbit 2 is identical respectively for the diameter of inside and outside dust-collecting box, thereby circular orbit 2 and lightning protection brush 3 are surrounded.The dust-collecting box lid is arranged on the outside of lightning protection brush 3, the shape of dust-collecting box lid is corresponding with the shape of circular orbit 2, and the dust-collecting box lid rotates with lightning protection brush 3, between dust-collecting box lid and the inside and outside dust-collecting box seal is set, with the dust indiffusion of guaranteeing that lightning protection brush 3 produces in sliding process.
According to permanent magnet direct-driving aerogenerator group of the present invention; because on all lightning current paths; lightning protection device all with the permanent magnet direct-driving aerogenerator group in metal parts (for example; wheel hub, generator, base bearing, engine room foundation etc.) fully insulation; so this lightning protection device gets around the base bearing of the generator of permanent magnet direct-driving aerogenerator group fully, thereby base bearing is carried out thoroughly lightning protection.
According to permanent magnet direct-driving aerogenerator group of the present invention, new circular orbit and lightning protection brush are set in the outer ring of original slip ring, can guarantee that by the CONTACT WITH FRICTION between circular orbit and the lightning protection brush permanent magnet direct-driving aerogenerator group provides reliable thunder and lightning path when moving.
Permanent magnet direct-driving aerogenerator group according to the present invention is by setting up lightning current leakage path independently and without the base bearing of generator, thereby effectively guarantee the normal operation of the base bearing of generator, prolonged the useful life of the base bearing of generator, thereby guarantee the normal operation of permanent magnet direct-driving aerogenerator group, reduce the failure rate of permanent magnet direct-driving aerogenerator group, also improved the generating efficiency of permanent magnet direct-driving aerogenerator group simultaneously.In addition, found independently lightning current leakage path owing to set up according to permanent magnet direct-driving aerogenerator according to the present invention, so significantly improved the release electrically conducting of path of lightning current.
Although illustrated by reference to the accompanying drawings and described some exemplary embodiments, but what it should be appreciated by those skilled in the art is, in the situation that does not break away from the principle of the present invention that limited its scope by claim and equivalent thereof and spirit, can make amendment and modification to these exemplary embodiments.
Claims (14)
1. the lightning protection device of the base bearing of the generator of a permanent magnet direct-driving aerogenerator group, wherein, described lightning protection device comprises the circular orbit on the dead axle that is arranged on generator and the lightning protection brush that can slide at circular orbit.
2. lightning protection device as claimed in claim 1, wherein, described circular orbit is arranged on the brake base on the dead axle that is fixed in generator, and described circular orbit and the insulation of described brake base.
3. lightning protection device as claimed in claim 2, wherein, at brake base the circular orbit insulation board is set, described circular orbit is arranged on the described circular orbit insulation board, thereby described circular orbit is by described circular orbit insulation board and the insulation of described brake base.
4. lightning protection device as claimed in claim 3, wherein, described circular orbit is made by stainless steel.
5. lightning protection device as claimed in claim 3, wherein, described circular orbit insulation board is made by epoxy resin or nylon.
6. lightning protection device as claimed in claim 1, wherein, described permanent magnet direct-driving aerogenerator group comprises slip ring shift fork, slip ring rocking arm and slip ring, one end of slip ring shift fork is fixed on the rotation axis, the other end of slip ring shift fork is connected with the slip ring rocking arm, the slip ring rocking arm is connected with the body of slip ring, so that the rotating part of slip ring rotates with the rotation of generator, described lightning protection device also comprises the brush carriage that is arranged on the slip ring shift fork, the lightning protection brush is fixed on the end of described brush carriage, and described brush carriage and the insulation of described slip ring shift fork.
7. lightning protection device as claimed in claim 6, wherein, at the slip ring shift fork brush carriage insulation board is set, described brush carriage is arranged on the described brush carriage insulation board, thereby described lightning protection brush is by described brush carriage insulation board and the insulation of described slip ring shift fork.
8. lightning protection device as claimed in claim 6, wherein, described lightning protection brush is two, described two lightning protection brushes are separately fixed at the two ends of described brush carriage.
9. lightning protection device as claimed in claim 7, wherein, described brush carriage insulation board is made by epoxy resin or nylon.
10. lightning protection device as claimed in claim 1, wherein, described lightning protection brush comprises that be used to the shell fragment and the discharging gap spare that make lightning protection brush and circular orbit close contact described discharging gap spare is spaced a predetermined distance from circular orbit.
11. lightning protection device as claimed in claim 6, wherein, the diameter of described circular orbit is greater than the diameter of described slip ring, so that described circular orbit and slip ring separate.
12. lightning protection device as claimed in claim 1, wherein, described lightning protection device also comprises for the dust-collecting box of collecting the dust that process that the lightning protection brush slides at circular orbit produces.
13. lightning protection device as claimed in claim 12, wherein, described dust-collecting box comprises inside and outside dust-collecting box and dust-collecting box lid, the internal-and external diameter with circular orbit is identical respectively for the diameter of described inside and outside dust-collecting box, thereby circular orbit and lightning protection brush are surrounded, described dust-collecting box lid is arranged on the outside of lightning protection brush, and the shape of described dust-collecting box lid is corresponding with the shape of described circular orbit, and described dust-collecting box lid slides at circular orbit with the lightning protection brush.
14. lightning protection device as claimed in claim 13 wherein, arranges seal between dust-collecting box lid and inside and outside dust-collecting box, with the dust diffusion that prevents that the thunder-lightning brush from producing in sliding process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210472307.2A CN102946168B (en) | 2012-11-20 | 2012-11-20 | Lightning protection device for main bearing of generator of permanent magnet direct-drive wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210472307.2A CN102946168B (en) | 2012-11-20 | 2012-11-20 | Lightning protection device for main bearing of generator of permanent magnet direct-drive wind generating set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102946168A true CN102946168A (en) | 2013-02-27 |
| CN102946168B CN102946168B (en) | 2014-09-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210472307.2A Active CN102946168B (en) | 2012-11-20 | 2012-11-20 | Lightning protection device for main bearing of generator of permanent magnet direct-drive wind generating set |
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| Country | Link |
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| CN (1) | CN102946168B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104495656A (en) * | 2014-12-16 | 2015-04-08 | 太原重工股份有限公司 | Lifter and lightning protection device thereof |
| CN109253057A (en) * | 2018-08-28 | 2019-01-22 | 新疆金风科技股份有限公司 | The installation method of the lightning-protection system of permanent magnet direct-driving aerogenerator group |
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| CN104495656A (en) * | 2014-12-16 | 2015-04-08 | 太原重工股份有限公司 | Lifter and lightning protection device thereof |
| CN109253057A (en) * | 2018-08-28 | 2019-01-22 | 新疆金风科技股份有限公司 | The installation method of the lightning-protection system of permanent magnet direct-driving aerogenerator group |
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| Publication number | Publication date |
|---|---|
| CN102946168B (en) | 2014-09-17 |
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