CN109958591B - Air cooling device of wind driven generator bearing and wind driven generator comprising same - Google Patents
Air cooling device of wind driven generator bearing and wind driven generator comprising same Download PDFInfo
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- CN109958591B CN109958591B CN201910340901.8A CN201910340901A CN109958591B CN 109958591 B CN109958591 B CN 109958591B CN 201910340901 A CN201910340901 A CN 201910340901A CN 109958591 B CN109958591 B CN 109958591B
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- 238000001816 cooling Methods 0.000 title claims abstract description 109
- 238000012546 transfer Methods 0.000 abstract description 7
- 230000007547 defect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 9
- 238000012423 maintenance Methods 0.000 description 7
- 230000032258 transport Effects 0.000 description 6
- 239000000306 component Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 5
- 230000004323 axial length Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000008439 repair process Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/60—Cooling or heating of wind motors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
- F03D80/70—Bearing or lubricating arrangements
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03D—WIND MOTORS
- F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
- F03D9/20—Wind motors characterised by the driven apparatus
- F03D9/25—Wind motors characterised by the driven apparatus the apparatus being an electrical generator
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The invention discloses an air cooling device of a wind driven generator bearing and a wind driven generator comprising the same, wherein the air cooling device is used for cooling the bearing of the wind driven generator and a bearing connecting part, the air cooling device comprises an air inlet fan, an air outlet pipeline, a jet device and an air conveying pipeline, the jet device is used for jetting cooling air to the surface of the bearing and/or the surface of the bearing connecting part, one end of the air conveying pipeline is connected with the air inlet fan, the other end of the air conveying pipeline is connected with the jet device, and the air outlet pipeline and the air conveying pipeline are mutually independent. According to the invention, the cooling air is conveyed to the jet device through the air conveying pipeline, and the jet device can jet the cooling air to the inner surface of the inner ring of the bearing and/or the inner surface of the bearing connecting part in a high-speed jet mode, so that the defect of low convective heat transfer strength of air cooling of the bearing in the prior art is overcome, and the cooling efficiency of the air cooling of the bearing is improved.
Description
Technical Field
The invention relates to the field of wind power generation, in particular to an air cooling device of a wind power generator bearing and a wind power generator comprising the same.
Background
The bearing is a core component of the wind generating set and is also a high incidence area of mechanical failure. When the bearing operates, the roller and the track generate heat through friction, and if the heat cannot be timely and effectively dissipated, various parts of the bearing and parts connected with the bearing generate excessive deformation in different degrees. This will seriously influence the normal rotation operation of generator to destroy bearing structure gradually, make the bearing life-span shorten, finally cause the unable normal operating of bearing and even damage. Therefore, the reasonable bearing cooling design is a necessary guarantee for the normal operation of the generator set, particularly for the permanent magnet direct-drive generator set, the bearing size is large, the heat generation amount is relatively large, and the importance of reasonably and effectively cooling the bearing is more prominent.
For the existing wind generating set, a liquid cooling method or an air cooling method is generally adopted to control the temperature of the bearing within a reasonable range. Liquid cooling has the advantage of high cooling efficiency, which can provide an upper limit of cooling power that is often greater than the heat production capacity of existing bearings. However, the liquid cooling system inevitably involves problems of corrosion, leakage, freezing prevention and the like, the cost is relatively high, and regular maintenance is required, so that the bearing liquid cooling is only applied to a part of machine types, and the more widely adopted mode is air cooling nowadays. The air cooling of the bearing has the obvious advantages of easy realization, low cost, basic maintenance free and the like. One common form of air cooling is that cooling air is driven by a fan into the vicinity of the bearings, and the cooling air flows over the partially exposed bearing surfaces, carrying away most of the heat generated by the bearings from these surfaces. However, because the effective heat dissipation area of the bearing air cooling is limited, the convective heat transfer strength of the air cooling is far lower than that of the liquid cooling, and the like, the cooling power provided by the conventional bearing air cooling method is close to the limit, and for the bearing with large heat generation amount, the air cooling may not even meet the cooling requirement. Therefore, how to further improve the air cooling efficiency of the bearing, namely the convective heat transfer strength of air cooling, has important significance for the design and operation of the bearing and the design and implementation of the cooling of the bearing.
Disclosure of Invention
The invention aims to overcome the defect that the convective heat transfer intensity of air cooling of a bearing in a wind driven generator in the prior art is lower, and provides an air cooling device of a wind driven generator bearing and a wind driven generator comprising the same.
The invention solves the technical problems through the following technical scheme:
the utility model provides an air cooling device of aerogenerator bearing for cooling aerogenerator's bearing and bearing connecting part, air cooling device includes air inlet fan and air outlet pipeline, its characterized in that, air cooling device still includes fluidic device and air transport pipeline, the fluidic device be used for with cooling air jet extremely the surface of bearing and/or bearing connecting part's surface, the one end of air transport pipeline with air inlet fan links to each other, the air transport pipeline is kept away from the one end of air inlet fan with the fluidic device links to each other, air outlet pipeline with air transport pipeline is independent each other.
In the scheme, cooling air enters from the air inlet fan and flows to the other end of the air conveying pipeline along one end of the air conveying pipeline connected with the air inlet fan, so that the cooling air enters the jet device and is sprayed to the surface of the bearing and/or the surface of the bearing connecting part by the jet device to achieve the purpose of cooling the bearing and the bearing connecting part, and heated air is discharged out of the interior of the wind driven generator through the air outlet pipeline. The jet device sprays cooling air to the surface of the bearing and/or the surface of the bearing connecting part in a high-speed jet mode, so that the convective heat transfer strength of air is enhanced, and the air cooling effect of the bearing is enhanced.
Preferably, the jet device is fixed to an inner surface of the bearing and/or an inner surface of the bearing connection part, the bearing being engaged with the bearing connection part, the bearing including an inner ring and an outer ring, the jet device being for injecting cooling air to the inner surface of the inner ring and/or the inner surface of the bearing connection part.
In this solution, the cooling air mainly cools the inner surface of the inner ring of the bearing and/or the inner surface of the bearing connection part.
Preferably, the fluidic device comprises at least one fluidic collar and a plurality of fluidic holes;
the jet loop pipe is connected with one end of the air transportation pipeline, which is far away from the air inlet fan, and is formed by at least one circular arc pipe, the outer diameter of the jet loop pipe is smaller than the inner diameter of the inner ring, and the jet loop pipe is coaxial with the bearing;
the jet holes are arranged on the jet ring pipe, arranged on the radial outer side of the jet ring pipe and arranged at intervals along the circumferential direction of the jet ring pipe.
In the scheme, cooling air enters the jet flow ring pipe through the air conveying pipeline and is sprayed to the inner surface of the inner ring and/or the inner surface of the bearing connecting part through the jet flow holes in the jet flow ring pipe, so that the effect of cooling the bearing and the bearing connecting part is achieved. The jet ring pipe is coaxial with the bearing, and the jet hole is arranged on the jet ring pipe and is arranged on the radial outer side of the jet ring pipe along the circumferential direction of the jet ring pipe so as to meet the requirement that the bearing can be uniformly cooled. In order to enable cooling air to be sprayed against the inner surface of the inner ring of the bearing and/or the inner surface of the bearing connection part, the outer diameter of the jet collar needs to be smaller than the inner diameter of the inner ring. In order to ensure the cooling effect of the bearing, a plurality of jet ring pipes can be arranged.
Preferably, when the jet device comprises two or more jet loops arranged along the axial direction of the jet loop, the distance between two adjacent jet loops along the axial direction of the jet loop is 4-20 times the diameter of the jet hole.
In this scheme, when setting up many efflux ring pipes, two adjacent efflux ring pipes need satisfy certain distance on the axial direction of efflux ring pipe, when satisfying the bearing cooling effect, also need guarantee not influence each other between the efflux ring pipe, practice thrift the cost.
Preferably, when the jet device comprises two or more jet loops arranged along the axial direction of the jet loop, the joints of the jet loops and the air transportation pipeline are staggered along the circumferential direction of the jet loop.
In this scheme, the setting of staggering along the circumference of efflux ring pipe of the junction of many efflux ring pipes and air transportation pipeline is in order not to take place to interfere between many efflux ring pipes, the maintenance of also being convenient for installation and later stage.
Preferably, the fluidic device comprises a fluidic channel, at least one fluidic sprinkler and a plurality of fluidic holes;
one end of the jet flow channel is connected with one end of the air transportation pipeline far away from the air inlet fan, and the jet flow channel is formed by at least one pipeline;
one end of the jet flow nozzle is connected with one end of the jet flow channel, which is far away from the air transportation pipeline, and the jet flow nozzle is arranged along the circumferential direction of the inner ring;
it is a plurality of the jet hole is located on the jet flow shower nozzle, just the jet hole with the internal surface of inner circle is relative, and is a plurality of the jet hole is followed the circumference and the axial interval setting of inner circle.
In the scheme, cooling air enters the jet flow channel through the air conveying pipeline, flows to the jet flow nozzle from the jet flow channel, and is sprayed to the inner ring from the jet flow hole in the jet flow nozzle, so that the purpose of cooling the bearing is achieved. The jet flow channel is formed by connecting a plurality of pipelines, so that splicing and installation are facilitated, and later-stage maintenance and repair are facilitated. The jet flow nozzle is arranged along the circumferential direction of the inner ring, and the jet flow holes are arranged along the circumferential direction and the axial interval of the inner ring so as to uniformly cool the bearing.
Preferably, the total axial length of the jet nozzle head in the axial direction of the inner ring is greater than 1/2 of the total axial length of the inner ring.
In this scheme, the axial total length of jet nozzle should not be too short, otherwise can't cool the internal surface of whole inner circle.
Preferably, an included angle between the axial direction of the jet hole and the axial direction of the inner ring is 45-90 degrees, and the shortest distance between the jet hole and the inner wall of the inner ring along the radial direction of the bearing is not more than 200mm and not more than 20 times of the diameter of the jet hole.
In the scheme, the shortest distance between the axial direction of the jet hole and the axial direction of the inner ring and the shortest distance between the jet hole and the inner wall of the inner ring along the radial direction of the bearing are both used for preventing the jet intensity of the cooling air jetted from the jet hole from being greatly attenuated before reaching the inner surface of the inner ring.
Preferably, the pitch between two adjacent jet holes in the circumferential direction and the axial direction of the inner ring is 2-10 times of the diameter of the jet hole.
In the scheme, the hole distance of the two adjacent jet holes along the circumferential direction or the axial direction of the inner ring is used for ensuring that the bearing can be uniformly cooled.
Preferably, the bent part and the joint of the jet device and the air transportation pipeline are of smooth structures, and the smooth structures are used for reducing pressure loss of high-speed airflow at the bent part and the joint of the jet device and the air transportation pipeline.
Preferably, the air outlet fan is disposed on the air outlet pipeline or the air outlet fan is disposed close to the air outlet pipeline.
In this scheme, air outlet fan is favorable to promoting the inside of air current exhaust aerogenerator.
A wind driven generator comprises a bearing and a bearing connecting part, wherein the bearing connecting part is the central part of a stator, and the wind driven generator is characterized by further comprising an air cooling device of the wind driven generator bearing.
The positive progress effects of the invention are as follows: the invention transports the cooling air to the jet device through the air transportation pipeline, and the jet device can jet the cooling air to the inner surface of the inner ring of the bearing and/or the inner surface of the bearing connecting part in a high-speed jet mode, thereby overcoming the defect of lower convective heat transfer strength of the air cooling of the bearing in the prior art and improving the cooling efficiency of the air cooling of the bearing.
Drawings
Fig. 1 is a schematic structural view of an air cooling device of a wind turbine generator and a wind turbine generator including the same according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of a fluidic device according to embodiment 1 of the present invention.
Fig. 3 is a schematic structural view of a fluidic device according to embodiment 2 of the present invention.
Description of reference numerals:
10 air inlet fan
20 air transport pipeline
30 fluidic device
301 jet loop
302 jet hole
303 fluidic channel
304 jet flow nozzle
40 air outlet pipeline
50 air outlet fan
60 bearing
601 inner ring
602 outer ring
70 bearing connecting part
80 cooling air
Detailed Description
The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.
Example 1
The invention provides an air cooling device of a wind driven generator bearing and a wind driven generator comprising the same, which are used for cooling the bearing of the wind driven generator. As shown in fig. 1-2, the air cooling device includes an air intake fan 10, an air transportation pipeline 20, a jet device 30, an air outlet pipeline 40, and an air outlet fan 50. The wind driven generator comprises the air cooling device, a bearing 60 and a bearing connecting part 70, wherein the bearing connecting part 70 is the central part of the stator, the jet device 30 is fixed on the inner surface of the bearing 60, the air outlet pipeline 40 is arranged on the bearing connecting part 70, one end of the air outlet pipeline 40 is communicated with the interior of the wind driven generator, and the other end of the air outlet pipeline 40 is communicated with the external environment of the wind driven generator. In other alternative embodiments, the fluidic device 30 may also be provided on the inner surface of the bearing 60 and/or the inner surface of the bearing connection part 70, or at least a portion of the fluidic device 30 may need to be provided close to the inner surface of the bearing 60 and/or the inner surface of the bearing connection part 70 for a better cooling effect.
The fluidic device 30 is used to inject cooling air 80 onto the surface of the bearing 60 and the surface of the bearing attachment component 70, particularly the surface of the bearing attachment component 70 that is adjacent to the bearing 60. One end of the air transportation pipeline 20 is connected with the air intake fan 10, one end of the air transportation pipeline 20 far away from the air intake fan 10 is connected with the jet device 30, the air outlet pipeline 40 is independent of the air transportation pipeline 20, and the air transportation pipeline 20 is used for transporting cooling air 80 from the air intake fan 10 to the jet device 30. In other alternative embodiments, the fluidic device 30 is not limited to injecting the cooling air 80 onto both the surface of the bearing 60 and the surface of the bearing connection component 70, at least to the surface of one, in particular the surface of the bearing 60 and/or the surface of the bearing connection component 70 at a higher temperature.
The bearing 60 comprises 2 inner rings 601 and 1 outer ring 602, the inner rings 601 are fixed, the outer ring 602 can rotate, and heat of the bearing 60 is mainly generated by mutual friction between the inner rings 601 and the outer ring 602 and bearing rollers during the operation of the generator, so that the temperature of the inner rings 601 and the temperature of the outer ring 602 are increased. The fluidic device 30 is mainly used for cooling the temperature of the inner surface of the inner ring 601 and the temperature of the inner surface of the portion of the bearing connecting member 70 close to the bearing 60, the inner ring 601 is engaged with the bearing connecting member 70, a part of heat of the inner ring 601 is dissipated by the bearing connecting member 70, and the other part of heat is taken away by the cooling air 80 injected by the fluidic device 30. It should be noted that in other alternative embodiments, the number of the inner ring 601 and the outer ring 602 is not limited to a fixed value, and the inner ring 601 is not fixed, and the outer ring 602 can rotate and can be replaced according to actual requirements. The cooling method of the outer ring 602 belongs to the prior art in the field, and is not described herein.
The jet device 30 comprises two jet collars 301 and a plurality of jet holes 302 formed in the jet collars 301, wherein the jet holes 302 are formed radially outside the jet collars 301. The diameter of the jet loop pipe 301 is 100mm, the jet loop pipe is connected with one end of the air transportation pipeline 20 far away from the air inlet fan 10, and the inlet connection position of the jet loop pipe 301 is set to be Y-shaped, so that the pressure loss of the cooling air 80 during transportation is reduced. The one end that efflux ring canal 301 is connected with air transportation pipeline 20 staggers along the circumference of efflux ring canal 301 and sets up, makes and does not take place to interfere between the many efflux ring canals, also is convenient for install and the maintenance in later stage. The fluidic collar 301 is fixed to the inner ring 601, and in alternative embodiments, the fluidic collar 301 is not limited to be fixed to the inner ring 601, but may be fixed to the bearing connecting member 70, and it is necessary to ensure the stability of the fluidic device 30. The inlet connection of the jet loop pipe 301 is not limited to Y-shape, and other smooth structures may be adopted, mainly to reduce the pressure loss during the transportation of the cooling air 80, and except for the inlet connection of the jet loop pipe 301, the bent portion thereof, and the connection and bent portion of the air transportation pipeline 20 may be smooth structures.
The jet ring pipe 301 is formed by connecting 4 circular pipes, so that splicing and installation are facilitated, and later-stage maintenance and repair are facilitated. In order to allow the cooling air 80 to be sprayed toward the inner surface of the inner race 601 and the inner surface of the bearing coupling member 70, particularly the inner surface of the bearing coupling member 70 near the bearing 60, the outer diameter of the jet loop 301 is smaller than the inner diameter of the inner race 601, and the diameter of the jet loop 301 is 100 mm. The two jet flow ring pipes 301 are coaxial with the bearing 60, each jet flow ring pipe 301 corresponds to a different inner ring 601, and the inner surface of each inner ring 601 can be uniformly cooled. The distance between two adjacent jet collars 301 in the axial direction of the jet collars 301 is 180 mm.
In other alternative embodiments, the number of the jet loops 301 is not limited to two, and is not limited to that each jet loop 301 corresponds to a different inner ring 601, and it is required to satisfy a certain distance between two adjacent jet loops 301, so as to achieve sufficient cooling effect of the bearing 60 and the bearing connecting part 70. The jet loop pipe 301 is not limited to be formed by connecting 4 circular pipes, and at least one circular pipe can be used. The fluidic collar 301 is not limited to injecting cooling air 80 into both the inner surface of the inner ring 601 and the inner surface of the bearing attachment feature 70, at least to the inner surface of one of them, particularly the inner surface of the inner ring 601 where the temperature is high and/or the inner surface of the bearing attachment feature 70 where the temperature is high. The distance between two adjacent jet collars 301 in the axial direction of the jet collars 301 is not limited to 180mm, and generally 4 to 20 times the diameter of the jet hole 302 is used. The diameter of the jet collar 301 is not limited to 100mm, and in order to prevent the intensity of the jet from being greatly attenuated before the cooling air 80 injected through the jet holes 302 reaches the inner surface of the inner ring 601 and/or the inner surface of the bearing connecting member 70, it is required that the shortest distance between the jet holes 302 of the jet collar 301 and the inner wall of the inner ring 601 in the radial direction of the bearing 60 is not more than 200mm and not more than 20 times the diameter of the jet holes 302.
The jet hole 302 is arranged on the radial outer side of the jet ring pipe 301, the diameter of the jet hole 302 is 10mm, and the jet hole 302 is arranged at intervals along the circumferential direction of the jet ring pipe 301. The included angle between the axial direction of the jet holes 302 and the axial direction of the inner ring 601 is 90 degrees, and the hole pitch of two adjacent jet holes 302 along the circumferential direction of the inner ring 601 is 40 mm. In other alternative embodiments, the diameter of the jet holes 302 is not limited to 10mm, and in order to allow the cooling air 80 to form jets through the jet holes 302 at a high flow rate, the diameter of the jet holes 302 is generally not too large, and needs to be small. The angle between the axial direction of the jet hole 302 and the axial direction of the inner ring 601 is not limited to 90 degrees, and generally 45 to 90 degrees is adopted, and 90 degrees is optimal. The pitch of the two jet holes 302 adjacent in the circumferential direction of the inner ring 601 is not limited to 40mm, and 2 to 10 times the diameter of the jet hole 302 may be generally used.
The air outlet fan 50 is disposed on the air outlet pipeline 40, and the air outlet pipeline 40 is used for discharging heated air. The cooling air 80 is taken from the air in the internal or external environment of the wind turbine, and the air in the internal of the wind turbine can be directly sucked by the intake fan 10 and transmitted to the air transportation duct 20, and the intake fan 10 is used for driving the cooling air 80 to be sprayed at high speed to the surface of the bearing 60 and/or the surface of the bearing connection part 70. Air in the external environment needs to be filtered and dehumidified, and then sucked by the air intake fan 10 and transmitted to the air transportation pipeline 20. The cooling air 80 enters the jet loop pipe 301 through the air transportation pipe 20, and is sprayed to the inner surface of the inner ring 601 and the inner surface of the bearing connecting part 70 through the jet holes 302 on the jet loop pipe 301, so as to achieve the effect of cooling the bearing 60 and the part of the bearing connecting part 70 close to the bearing 60. The heated air is guided to the air outlet pipeline 40 by the power of the air outlet fan 50, and is discharged to the outside of the wind driven generator through the air outlet pipeline 40. In other alternative embodiments, the outlet fan 50 may be disposed near the outlet duct 40.
In this embodiment, the cooling air 80 is transported to the position of the jet device 30 through the air transportation pipeline 20, and the jet device 30 can intensively spray the cooling air 80 to the inner surface of the inner ring 601 of the bearing 60 and the inner surface of the bearing connecting component 70, so that the defect of low convective heat transfer strength of air cooling of the bearing 60 in the prior art is overcome, and the cooling efficiency of air cooling of the bearing 60 is improved.
Example 2
The structure of this embodiment is substantially the same as that of embodiment 1, except that the fluidic device 30 is different.
As shown in fig. 3, fluidic device 30 includes a fluidic channel 303, a plurality of fluidic spray heads 304, and a plurality of fluidic orifices 302. One end of the jet flow channel 303, which is far away from the air supply duct 10, is connected with the end of the air supply duct 20, which is far away from the air supply duct 20, and the jet flow nozzle 304 is connected with the end of the jet flow channel 303, which is far away from the air supply duct 20. The jet flow channel 303 is formed by connecting a plurality of pipelines, so that splicing and installation are facilitated, and later-stage maintenance and repair are facilitated. The jet nozzle 304 is arranged along the circumferential direction of the inner ring 601, so that the inner ring 601 can be uniformly cooled. The total axial length of the jet nozzle 304 in the axial direction of the inner ring 601 is smaller than 1/2 of the total axial length of the inner ring 601, so that the cost can be reduced while the sufficient bearing cooling effect is satisfied. The fluidic channel 303 is fixed to the inner ring 601. in alternative embodiments, the fluidic channel 303 is not limited to being fixed to the inner ring 601, but may be fixed to the bearing attachment part 70, and the stability of the fluidic device 30 needs to be ensured. The number of the jet heads 304 is not limited to a plurality, and at least one jet head 304 is used.
The jet hole 302 is arranged on the jet nozzle 304, the jet hole 302 is opposite to the inner surface of the inner ring 601, and the plurality of jet holes 302 are arranged at intervals along the circumferential direction and the axial direction of the inner ring 601. The pitch of two adjacent jet holes 302 in the axial direction of the inner ring 601 may also be 2 to 10 times the diameter of the jet hole 302. The cooling air 80 enters the jet flow channel 303 through the air transportation pipeline 20, then flows to the jet flow nozzle 304 from the jet flow channel 303, and is sprayed to the inner ring 601 through the jet flow holes 302 on the jet flow nozzle 304, so that the purpose of cooling the bearing 60 is achieved. In other alternative embodiments, the jet holes 302 of the jet nozzle 304 are not limited to injecting the cooling air 80 only to the inner surface of the inner ring 601, but may also be injected to the inner surface of the bearing connecting part 70, at least to the inner surface of one of the inner rings 601, especially the inner surface of the inner ring 601 with a higher temperature and/or the inner surface of the bearing connecting part 70 with a higher temperature.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (9)
1. An air cooling device of a wind driven generator bearing is used for cooling a bearing and a bearing connecting part of a wind driven generator, and comprises an air inlet fan and an air outlet pipeline;
the bearing includes an inner race, the fluidic device includes:
the jet loop pipe is connected with one end of the air transportation pipeline, which is far away from the air inlet fan, is formed by at least one circular arc pipe, the outer diameter of the jet loop pipe is smaller than the inner diameter of the inner ring, and the jet loop pipe is coaxial with the bearing;
and the plurality of jet holes are arranged on the jet ring pipe and are arranged on the radial outer side of the jet ring pipe, and the plurality of jet holes are arranged at intervals along the circumferential direction of the jet ring pipe.
2. The wind turbine bearing air cooling device of claim 1 wherein said bearing is engaged with said bearing attachment feature, said bearing further comprising an outer race, said fluidic means for injecting said cooling air into an inner surface of said inner race and an inner surface of said bearing attachment feature.
3. The air-cooling device for a bearing of a wind turbine according to claim 1, wherein when said jet means comprises at least two jet collars arranged in the axial direction of said jet collars, the distance between two adjacent jet collars in the axial direction of said jet collars is 4 to 20 times the diameter of said jet holes.
4. The air cooling device for wind turbine bearing according to claim 1, wherein when said jet means comprises at least two jet loops arranged along the axial direction of said jet loops, the connection between said jet loops and said air transportation pipe is staggered along the circumferential direction of said jet loops.
5. The air cooling device for a wind turbine bearing according to any of claims 1 to 4, wherein an angle between an axial direction of the jet hole and an axial direction of the inner ring is 45 ° to 90 °, and a shortest distance between the jet hole and an inner wall of the inner ring in a radial direction of the bearing is not more than 200mm and not more than 20 times a diameter of the jet hole.
6. The air cooling device for a wind turbine bearing according to any of claims 1 to 4, wherein the pitch of two adjacent jet holes in the circumferential and axial directions of the inner ring is 2 to 10 times the diameter of the jet hole.
7. The air cooling device for the wind turbine bearing according to claim 1, wherein the bent portion and the connection portion of the jet device and the air transportation pipe are of a smooth structure for reducing pressure loss of high-speed air flow at the bent portion and the connection portion of the jet device and the air transportation pipe.
8. The wind turbine bearing air cooling device of claim 1, wherein the outlet fan is disposed on or near the outlet duct.
9. Wind generator comprising a bearing and a bearing connection part, said bearing connection part being a central part of a stator, characterized in that the wind generator further comprises an air cooling of the wind generator bearing according to any of claims 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910340901.8A CN109958591B (en) | 2019-04-25 | 2019-04-25 | Air cooling device of wind driven generator bearing and wind driven generator comprising same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910340901.8A CN109958591B (en) | 2019-04-25 | 2019-04-25 | Air cooling device of wind driven generator bearing and wind driven generator comprising same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109958591A CN109958591A (en) | 2019-07-02 |
| CN109958591B true CN109958591B (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910340901.8A Active CN109958591B (en) | 2019-04-25 | 2019-04-25 | Air cooling device of wind driven generator bearing and wind driven generator comprising same |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205277723U (en) * | 2015-12-31 | 2016-06-01 | 北京金风科创风电设备有限公司 | Wind generating set and base bearing cooling system thereof |
| CN107044390A (en) * | 2017-05-12 | 2017-08-15 | 北京金风科创风电设备有限公司 | Wind generating set and cooling control method thereof |
| CN108019324A (en) * | 2017-12-06 | 2018-05-11 | 北京金风科创风电设备有限公司 | Shafting cooling system, control method thereof and wind generating set |
| CN109667732A (en) * | 2019-02-20 | 2019-04-23 | 浙江大学 | Wind power generating set |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102678472A (en) * | 2011-03-18 | 2012-09-19 | 华锐风电科技(集团)股份有限公司 | Cooling device for wind generating set and wind generating set |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205277723U (en) * | 2015-12-31 | 2016-06-01 | 北京金风科创风电设备有限公司 | Wind generating set and base bearing cooling system thereof |
| CN107044390A (en) * | 2017-05-12 | 2017-08-15 | 北京金风科创风电设备有限公司 | Wind generating set and cooling control method thereof |
| CN108019324A (en) * | 2017-12-06 | 2018-05-11 | 北京金风科创风电设备有限公司 | Shafting cooling system, control method thereof and wind generating set |
| CN109667732A (en) * | 2019-02-20 | 2019-04-23 | 浙江大学 | Wind power generating set |
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