CN112524098B - Filter device, wind generating set cooling system and wind generating set - Google Patents

Filter device, wind generating set cooling system and wind generating set Download PDF

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Publication number
CN112524098B
CN112524098B CN202011385032.XA CN202011385032A CN112524098B CN 112524098 B CN112524098 B CN 112524098B CN 202011385032 A CN202011385032 A CN 202011385032A CN 112524098 B CN112524098 B CN 112524098B
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China
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air
filtering device
annular
impurity
generating set
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CN112524098A (en
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崔明
刘嘉明
施杨
许移庆
陈晓静
吴立建
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Zhejiang University ZJU
Shanghai Electric Wind Power Group Co Ltd
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Zhejiang University ZJU
Shanghai Electric Wind Power Group Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/701—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps
    • F04D29/703—Suction grids; Strainers; Dust separation; Cleaning especially adapted for elastic fluid pumps specially for fans, e.g. fan guards
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
    • 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
    • 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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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Combustion & Propulsion (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention discloses a filtering device, a wind generating set cooling system and a wind generating set, wherein the filtering device is used in an air cooling system of the wind generating set and comprises an air inlet pipeline, an air guiding device and a fan, the air guiding device comprises an annular air guiding channel with an opening at the top, the air inlet pipeline is communicated with the annular air guiding channel, the annular air guiding channel is configured to enable air flowing into the annular air guiding channel from the air inlet pipeline to spirally flow along the axial direction of the annular air guiding channel, an air outlet of the filtering device is positioned at one side of the opening at the top of the annular air guiding channel, and the fan is arranged at the air outlet. According to the filtering device, the cooling system of the wind generating set and the wind generating set, provided by the invention, the filter screen is replaced by a cyclone flow mode, sand and dust in air are thrown out by centrifugal force and fall and deposit, so that the flow velocity of air flow in an air cooling pipeline of the cooling system of the wind generating set is not reduced due to the influence of the filtering device, and the cooling effect on an engine room and a hub is ensured.

Description

Filter device, wind generating set cooling system and wind generating set
Technical Field
The invention relates to the field of wind driven generators, in particular to a filtering device, a cooling system of a wind driven generator set and the wind driven generator set.
Background
When the wind generating set is in operation, each important part in the wind generating set can generate a large amount of heat due to operation or loss of the wind generating set, and particularly, each part and system are positioned in relatively closed space such as a cabin. The heat in this space needs to be discharged in time to guarantee that the part normally operates under the environment in the safe temperature, otherwise can influence the life-span of part, lead to appearing damaging or becoming invalid, can cause the serious accident that the unit burns out even because of high temperature environment.
Therefore, a special cooling system is usually provided in the assembly. The cooling system may be a liquid cooling device disposed on a surface of the heat generating component, or an air cooling system formed inside the cabin and capable of communicating with the outside and exchanging with the outside cold air. Because the air cooling needs to suck the outside cold air into the cabin, in order to ensure that the cooling air does not influence the normal operation of the components in the cabin, the outside cooling air needs to be filtered and then enters the cabin. On the basis, the cooling air needs to overcome the resistance caused by the change of the trend of the internal pipeline of the cooling part and the resistance of the filtering device, so that the air volume of the cooling fan is reduced, and the cooling effect is greatly reduced. On this basis, if the cooling effect is to be guaranteed, the power of the driving fan needs to be increased, the heating is more serious due to the increase of the fan power, and the improvement of the cooling effect cannot be predicted to have a better effect.
Disclosure of Invention
The invention aims to overcome the defect that an air cooling system in the prior art uses a filtering device to affect the cooling effect, and provides a filtering device, a wind generating set cooling system and a wind generating set.
The invention solves the technical problems through the following technical scheme:
the utility model provides a filter equipment, its is arranged in wind generating set's air cooling system, its characterized in that, filter equipment includes air inlet pipeline, air ducting and fan, air ducting includes open-top's annular wind-guiding passageway, air inlet pipeline communicate in annular wind-guiding passageway, annular wind-guiding passageway configuration make by air inlet pipeline flows in the interior air of annular wind-guiding passageway carries out spiral flow along annular wind-guiding passageway's axial, filter equipment's air outlet is located annular wind-guiding passageway's open-top one side, the fan set up in air outlet department.
The inside of the filtering device is not provided with a structure similar to a filter screen, the filtering of the air is realized in a mode that the air flows through a cyclone type, sand and dust in the air flows along an annular air guide channel to perform high-speed spiral motion, the sand and dust with large motion inertia is thrown onto the side wall of the annular air guide channel through centrifugal force, the sand and dust fall and are discharged to the bottom of the annular air guide channel after collision, the sand and dust cannot flow out of the filtering device from the top opening of the annular air guide channel along with high-speed airflow, and the structure similar to the filter screen is avoided.
Preferably, the filtering device includes a cylindrical housing, an air duct is fixedly disposed inside the housing, the air duct is disposed coaxially with the housing, an annular gap between the air duct and the housing forms the annular air guiding channel, and one end of the air inlet pipeline is connected to a side wall of the housing. Filter equipment is through a shell to at its inside air duct that sets up, form annular wind-guiding passageway through the sleeve structure, the air-supply line is direct to communicate inside annular wind-guiding passageway promptly on the lateral wall of shell, does benefit to filter equipment's structural arrangement, holistic simple structure, the integrated level is higher, and occupation space is little, does benefit to placing inside wind generating set, and the space requirement to the cabin is lower.
Preferably, a connecting plate is arranged inside the shell, the air duct and the shell are fixed through the connecting plate, and a plurality of air outlets are formed in the surface of the connecting plate. The shell and the air duct are fixed with each other through the connecting plate, so that the stability of the formation of the annular air guide channel is ensured, and in addition, the air outlet is formed in the surface of the connecting plate, so that the normal flow of air in the filtering device cannot be influenced by the arrangement of the connecting plate.
Preferably, the bottom of the annular air guide channel is provided with an impurity discharge port, the bottom of the filtering device is provided with an impurity collecting part, the impurity discharge port faces the inside of the impurity collecting part, at least one part of the impurity collecting part is detachable relative to the filtering device, or the bottom of the impurity collecting part is provided with a cleaning port capable of closing and opening the filtering device. Annular wind-guiding passageway's bottom sets up impurity collection portion, can conveniently use a period of back at filter equipment, clear up its inside, with the impurity discharge filter equipment's of filtering inside, avoid it to pile up too much influence annular wind-guiding passageway's normal use, and for conventional filter screen, this filter equipment can not block annular wind-guiding passageway, influence the air current velocity of flow, so cooling air's cooling effect has been guaranteed, and the clearance cycle of impurity collection portion is longer, do not need maintainer often to dismantle the clearance.
Preferably, the impurity collecting part includes an impurity guide wall and a collecting platform, the impurity guide wall is disposed on one side of the impurity discharging port far from the annular air guiding channel, the impurity guide wall encloses and forms an impurity guide channel, a top opening of the impurity guide channel faces the impurity discharging port, a bottom opening of the impurity guide channel faces the collecting platform, and the collecting platform is detachable with respect to the filtering device, or the cleaning port is located on the collecting platform. Impurity guide wall encloses the both ends of establishing the impurity guide channel of formation and moves towards annular air guide channel and collection platform respectively, can stretch the distance between annular air guide channel and the impurity on the one hand, avoids in small part impurity is brought into the air that flows out filter equipment, and on the other hand, impurity guide channel is used for guiding the direction of impurity whereabouts, is convenient for collect, makes things convenient for follow-up clearance.
Preferably, one end of the top of the impurity guide wall is connected to the inner side wall of the outer shell, the impurity guide wall surrounds to form a tapered cavity, and the cross-sectional area of the tapered cavity is gradually reduced towards the direction away from the annular air guide channel. The impurity guide channel is conical, so that impurities can be guided and accumulated conveniently.
Preferably, the bottom of the filter device is provided with a one-way valve, and the one-way valve defines a direction in which air inside the filter device flows to the outside. The setting of check valve can be discharged the air of the direction of small part flow direction filter equipment bottom, keeping away from the air outlet promptly, outside air can not get into inside the filter equipment from this place simultaneously, avoids influencing the air current in the annular wind-guiding passageway.
Preferably, the filter device further comprises a fine filter assembly, the fine filter assembly comprises a plurality of conical separation cylinders and an air flow channel, one end of the bottom of the air flow channel faces the top opening, the conical separation cylinders are arranged along the axial direction of the air flow channel and are coaxially arranged with the air flow channel, and a secondary air filtering channel is formed between the inner wall of the air flow channel and the side wall of the conical separation cylinder. The fine filtration subassembly has set up to carry out secondary filter to the air that flows annular wind-guiding passageway, divides to manage more and adds tiny dust, can also form a plurality of cyclones simultaneously, promotes the speed of air current by a wide margin, has not only promoted filterable precision and effect, can also promote the cooling effect of air current to a certain extent.
Preferably, one end of the bottom of the airflow channel is provided with an impurity receiving disc, one side of the impurity receiving disc is connected to the inner side wall of the airflow channel, and the other side of the impurity receiving disc extends towards the axis of the airflow channel. The impurity receiving disc is used for receiving fine impurity dust falling out of the airflow channel.
Preferably, a filter screen is covered at one end of the bottom of the airflow channel or at the top opening of the annular air guide channel. The filter screen is additionally arranged at the position, so that the filtering effect can be improved, the filter screen can use the common filtering effect, and the influence on the air flow speed is reduced.
Preferably, one end of the air inlet pipeline, which is communicated with the annular air guide channel, is tapered, and the cross-sectional area of the taper gradually decreases in a direction close to the annular air guide channel. The end of the air inlet pipeline connected to the annular air guide channel is provided with a tapered necking shape, so that the speed of air flow entering the annular air guide channel can be increased, and the air cooling effect can be improved.
Preferably, the axial direction of the air inlet pipeline extends along the tangential direction of the annular air guide channel. The air inlet pipeline extends along the tangential direction of the annular air guide channel, so that air directly flows along the annular direction after entering the annular air guide channel, and the spiral air flow is smoother.
The utility model provides a wind generating set cooling system, its includes air cooling pipeline and drive arrangement, the inside of wind generating set's cabin and wheel hub is laid to at least some of air cooling pipeline, the air intake and the air outlet intercommunication of air cooling pipeline are to the external world, drive arrangement connect in the air cooling pipeline for the drive the inside air flow of air cooling pipeline, its characterized in that, wind generating set cooling system include as above filter equipment, filter equipment set up in the air intake department of air cooling pipeline.
This wind generating set cooling system has used foretell filter equipment, make the air current velocity of flow in its air cooling pipeline can not receive filter equipment's influence and lead to reducing, thereby guaranteed the cooling effect to cabin and wheel hub, on this basis, just need not increase filter equipment's size and improve the problem that the driving force reduces in order to solve the cooling air current velocity of flow, also need not change the inside mode of laying in cabin and come to provide bigger setting space for filter equipment, the design cost is simplified, save time and manpower, the economic nature improves.
Preferably, the air-cooling pipeline includes a nacelle branch pipeline and a hub branch pipeline, air inlets of the nacelle branch pipeline and the hub branch pipeline are both communicated with an air outlet of the filtering device, the nacelle branch pipeline is located inside the nacelle, and a part of the hub branch pipeline is located inside the hub. Get into the inside air cooling pipeline in cabin and get into the air cooling pipeline in the wheel hub and branch, can make comparatively microthermal air can directly get into wheel hub inside and cool down, improved the cooling effect, avoid setting up single air cooling pipeline and get into wheel hub again through the inside heating element in cabin and make its not good condition to the inside cooling effect of wheel hub, improved the holistic cooling effect of cooling system.
A wind power plant characterized in that it comprises a wind power plant cooling system as described above.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
according to the filtering device, the cooling system of the wind generating set and the wind generating set provided by the invention, the filtering device adopts a cyclone flow mode, sand and dust in air are thrown onto the side wall of the annular air guide channel through centrifugal force and then fall and are discharged to the bottom of the annular air guide channel, and the sand and dust cannot flow out of the filtering device from the top opening of the annular air guide channel along with high-speed airflow, so that a structure similar to a filter screen in the traditional filtering device is not adopted, the flow rate of the airflow cannot be reduced due to resistance increase, the original cooling effect of the cooling air is ensured, the flow rate of the airflow in an air cooling pipeline of the cooling system of the wind generating set cannot be reduced due to the influence of the filtering device, the cooling effect on an engine room and a hub is ensured, on the basis, the driving capability is improved without increasing the size of the filtering device to solve the problem of reducing the flow rate of the cooling airflow, a larger arrangement space is provided for the filtering device without changing the arrangement mode in the engine room, the design cost is simplified, the time and the manpower are saved, and the economical efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of a wind turbine generator system according to embodiment 1 of the present invention.
Fig. 2 is a schematic structural view of a filtration apparatus according to embodiment 1 of the present invention.
Fig. 3 is a schematic cross-sectional view of a filter device according to embodiment 1 of the present invention.
Fig. 4 is a schematic sectional view showing a filter device and a fine filter assembly according to example 2 of the present invention.
Fig. 5 is a schematic structural view of a wind turbine generator system according to embodiment 3 of the present invention.
Description of reference numerals:
filter device 1
Annular air guide channel 1a
Impurity guide passage 1b
Air flow 10
Direction of movement 20 of the impurities
Air inlet pipeline 11
Outer casing 12
Air duct 13
Fan 14
Connecting plate 15
Impurity guide wall 16
Collecting platform 17
Fine filter assembly 2
Conical separation cylinder 21
Airflow channel 22
Impurity receiving tray 23
Air cooling pipeline 3
Nacelle branch pipe 31
Hub branch pipeline 32
Drive device 4
Nacelle 5
Hub 6
Detailed Description
The present invention will be more clearly and completely described below by way of 3 preferred embodiments in conjunction with the accompanying drawings, without thereby limiting the scope of the invention to the embodiments described.
Example 1
As shown in fig. 1 to 3, the present embodiment provides a filtering device 1, a cooling system of a wind turbine generator system, and a wind turbine generator system. Wherein, filter equipment 1 is arranged in this wind generating set cooling system, filter equipment 1 specifically includes air inlet pipeline 11, air ducting and fan 14, air ducting includes open-top's annular wind-guiding passageway 1a, air inlet pipeline 11 communicates in annular wind-guiding passageway 1a, and annular wind-guiding passageway 1a configures to and makes the air that flows into annular wind-guiding passageway 1a by air inlet pipeline 11 can carry out spiral flow along annular wind-guiding passageway 1 a's axial, filter equipment 1's air outlet is located annular wind-guiding passageway 1 a's open-top one side, fan 14 sets up in air outlet department.
The inside of the filtering device 1 is not provided with a structure similar to a filter screen, the mode that air flows in a cyclone mode is adopted, when the air flow moves spirally along the annular air guide channel 1a at a high speed, the sand and dust with larger movement inertia is thrown onto the side wall of the annular air guide channel 1a through centrifugal force, the sand and dust fall and are discharged to the bottom of the annular air guide channel 1a after collision, the sand and dust cannot flow out of the filtering device 1 from the top opening of the annular air guide channel 1a along with the high-speed air flow, and due to the fact that the structure similar to the filter screen is not adopted, when the air flows through the filtering device 1, the flow speed of the air flow cannot be reduced due to the increase of resistance, namely, the cooling effect of the original cooling air is ensured.
The fan 14 can be selected from an axial flow fan 14 and a centrifugal fan 14, the selection of the fan 14 depends on the internal resistance of the system and the arrangement of the whole structure, in this embodiment, the centrifugal fan 14 is selected, and of course, in other embodiments, other types of fans 14 can be used.
Further, the filter device 1 further comprises a housing 12. The casing 12 is cylindrical, an air duct 13 is fixedly arranged inside the casing 12, the air duct 13 is coaxially arranged with the casing 12, an annular air guiding channel 1a is formed in an annular gap between the air duct 13 and the casing 12, and one end of the air inlet pipeline 11 is connected to the side wall of the casing 12. Filter equipment 1 is through a shell 12 to at its inside air duct 13 that sets up, form annular wind-guiding passageway 1a through the mode of sleeve structure promptly, air-supply line 11 is direct to link to and has been linked to inside annular wind-guiding passageway 1a promptly on the lateral wall of shell 12, does benefit to filter equipment 1's structural arrangement, holistic simple structure, and the integrated level is higher, and occupation space is little, does benefit to and places in wind generating set inside, and the space requirement in cabin 5 is lower. Preferably, in the present embodiment, the axial direction of the air intake duct 11 extends along the tangential direction of the annular air guiding passage 1 a. The air inlet pipeline 11 extends along the tangential direction of the annular air guide channel 1a, so that air directly flows along the annular direction after entering the annular air guide channel 1a, and the spiral air flow is smoother. The axial direction of the air inlet duct 11 refers to the direction of the air flow 10 in the air inlet duct 11.
In this embodiment, a connecting plate 15 is further disposed inside the casing 12, the air duct 13 and the casing 12 are fixed by the connecting plate 15, and a plurality of air outlets are disposed on a surface of the connecting plate 15. The casing 12 and the air duct 13 are fixed to each other through the connecting plate 15, so that the stability of the annular air guide channel 1a is ensured, and in addition, the surface of the connecting plate 15 is provided with an air outlet, so that the normal flow of air inside the filtering device 1 is not influenced by the arrangement of the connecting plate 15. Preferably, the connecting plate 15 is an annular plate with a plurality of holes on the surface, the plane of the annular plate is perpendicular to the axial direction of the air duct 13, and the inner side and the outer side of the annular plate are respectively fixed to the inner side wall of the casing 12 and the outer side wall of the air duct 13.
The bottom of the annular air guide channel 1a of the filtering device 1 is provided with an impurity discharge port, the bottom of the filtering device 1 is provided with an impurity collecting part, the impurity discharge port faces the impurity collecting part, at least one part of the impurity collecting part is detachable relative to the filtering device 1, or the bottom of the impurity collecting part is provided with a cleaning port capable of closing and opening the filtering device 1. Set up impurity collection portion and can use a period after filter equipment 1, can clear up its inside, will fall impurity collection portion's impurity discharge filter equipment 1's inside, avoid it to pile up too much influence annular wind-guiding passageway 1 a's normal use, and for conventional filter screen, this filter equipment 1 can not block annular wind-guiding passageway 1a, influence the air current 10 velocity of flow, so cooling air's cooling effect has been guaranteed, and impurity collection portion's clearance cycle is longer, do not need the maintainer to dismantle the clearance often.
Further, the impurity collecting part comprises an impurity guide wall 16 and a collecting platform 17, the impurity guide wall 16 is arranged on one side of the impurity discharging port far away from the annular air guide channel 1a, the impurity guide wall 16 encloses and forms an impurity guide channel 1b, the top opening of the impurity guide channel 1b faces the impurity discharging port, the bottom opening of the impurity guide channel 1b faces the collecting platform 17, and the collecting platform 17 is detachable relative to the filtering device 1, or the cleaning port is positioned on the collecting platform 17. Impurity guide wall 16 encloses the both ends of establishing the impurity guide passageway 1b that forms and respectively towards annular wind-guiding passageway 1a and collection platform 17, can stretch the distance between annular wind-guiding passageway 1a and the impurity on the one hand, avoids a small part impurity to be brought into in the air that flows out filter equipment 1, and on the other hand, impurity guide passageway 1b is used for guiding the direction of impurity whereabouts, is convenient for collect, makes things convenient for follow-up clearance.
Collection platform 17 can be dismantled for filter equipment 1 to when clearance impurity, directly through dismantling collection platform 17, can clear up all accumulational impurity. The collection platform 17 as a whole corresponds to the cleaning opening. In order to realize better disassembly and the convenient and quick effect of cleaning, in this embodiment, the collection platform 17 is set to be a valve which can be manually opened or closed or an electric valve which can be opened or closed through circuit control at the same time, and the collection platform can be turned over to be opened or opened in a translation manner, so long as the convenient cleaning effect can be realized. In particular, the details of the related structure or control system of the collection platform 17 are well known in the art and therefore will not be described herein.
Preferably, in the present embodiment, one end of the top of the impurity guiding wall 16 is connected to the inner side wall of the outer casing 12, and the impurity guiding wall 16 encloses to form a tapered cavity, and the cross-sectional area of the tapered cavity gradually decreases in a direction away from the annular air guiding channel 1 a. The impurity guide passage 1b is tapered to guide and accumulate impurities, so that the impurities can fall along the inner surface of the taper in the movement direction 20, and the impurities can be conveniently guided to be collected. In addition, the top of the impurity guide wall 16 is connected to the inner side wall of the housing 12, so that the discharge range of the impurity discharge port can be covered, and dust or impurities can be prevented from entering some gaps inside the structure and affecting the normal use of the structure.
On the basis of the above structure, preferably, in other embodiments, the bottom of the filtering device 1 may further be provided with a one-way valve, and the one-way valve is an air valve, and the one-way valve is defined in a direction that allows air inside the filtering device 1 to flow to the outside, and the outside air cannot enter the inside of the filtering device 1. The setting of check valve can be discharged the air of the direction that the air outlet was kept away from to a small part of stream flow direction filter equipment 1 bottom promptly, and outside air can not get into filter equipment 1 inside from this simultaneously, avoids influencing the air current in annular wind-guiding passageway 1 a. In this embodiment, the collection platform 17 may be made to function as a one-way valve. How to realize the unidirectional air flow limitation is the prior art, and therefore, the description is not repeated herein.
In addition, a filter screen (not shown) may be covered at the top opening of the annular air guiding passage 1 a. The filter screen is additionally arranged at the position, so that the filtering effect can be improved, the filter screen can use the common filtering effect, and the influence on the air flow speed is reduced. Of course, in other embodiments, no screen structure may be provided to avoid affecting the flow rate of the airflow.
Preferably, in this embodiment, one end of the air inlet duct 11 of the filter device 1, which is communicated with the annular air guiding channel 1a, may be provided with a conical shape, and the cross-sectional area of the conical shape gradually decreases in a direction approaching to the annular air guiding channel 1 a. One end of the air inlet pipeline 11 connected to the annular air guide channel 1a is provided with a tapered necking shape, so that the speed of the air flow 10 entering the annular air guide channel 1a can be increased, and the air cooling effect can be improved.
The embodiment also provides a wind generating set cooling system, it includes air cooling pipeline 3, drive arrangement 4 and foretell filter equipment 1, and wind generating set's cabin 5 and wheel hub 6's inside is laid to at least some of air cooling pipeline 3, and the air intake and the air outlet of air cooling pipeline 3 communicate to the external world, and filter equipment 1 sets up in the air intake department of air cooling pipeline 3, and drive arrangement 4 is connected in air cooling pipeline 3 for the inside air flow of drive air cooling pipeline 3.
This wind generating set cooling system has used foretell filter equipment 1, make the air current velocity of flow in its air cooling pipeline 3 can not receive filter equipment 1's influence and lead to reducing, thereby guaranteed the cooling effect to cabin 5 and wheel hub 6, on this basis, just need not increase filter equipment 1's size and improve the problem that the driving capability reduces in order to solve the cooling air current velocity of flow, also need not change cabin 5 inside the mode of laying and come to provide bigger setting space for filter equipment 1, design cost is simplified, save time and manpower, economy improves. In the present embodiment, the filtering device 1 is disposed at the tail of the nacelle 5, and in other embodiments, the filtering device 1 may be disposed at other positions of the wind turbine.
The embodiment also provides a wind generating set, and the cooling system of the wind generating set is applied to the wind generating set.
Example 2
As shown in fig. 4, the structural arrangement of the present embodiment is substantially the same as that of embodiment 1, except that: the filter device 1 further comprises a fine filter assembly 2. The fine filtering component 2 comprises a plurality of conical separating cylinders 21 and an air flow channel 22, one end of the bottom of the air flow channel 22 faces the top opening, the conical separating cylinders 21 are arranged along the axial direction of the air flow channel 22 and are coaxially arranged with the air flow channel 22, and a secondary air filtering channel is formed between the inner wall of the air flow channel 22 and the side wall of the conical separating cylinders 21. The fine filter assembly 2 is arranged to secondarily filter the air flowing out of the annular air guide channel 1a, so that the fine dust is separated and treated, meanwhile, a plurality of cyclones can be formed, the speed of the air flow 10 is greatly increased, the filtering precision and effect are improved, and the cooling effect of the air flow 10 can be improved to a certain degree. Preferably, in this embodiment, an inverted funnel-shaped air inlet may be disposed at one end of the bottom of the air flow channel 22 to guide the air flowing out from the annular diversion channel into the air flow channel 22.
On the basis, one end of the bottom of the airflow channel 22 is further provided with an impurity receiving disc 23 (not shown in the figure), one side of the impurity receiving disc 23 is connected to the inner side wall of the airflow channel 22, and the other side of the impurity receiving disc 23 extends towards the axis of the airflow channel 22. The impurity receiving pan 23 is provided to receive fine impurity dust falling from the inside of the air flow passage 22.
In addition, a filter (not shown) may be covered at one end of the bottom of the airflow channel 22. The filter screen is additionally arranged at the position, so that the filtering effect can be improved, the filter screen can use the common filtering effect, and the influence on the air flow speed is reduced. Of course, in other embodiments, no screen structure may be provided to avoid affecting the flow rate of the airflow.
Example 3
As shown in fig. 5, the structural arrangement of the present embodiment is substantially the same as that of embodiment 1, except for the arrangement of the cooling system of the wind turbine generator set.
Specifically, in the present embodiment, the air-cooling pipeline 3 includes a nacelle 5 branch pipeline 31 and a hub 6 branch pipeline 32, air inlets of the nacelle 5 branch pipeline 31 and the hub 6 branch pipeline 32 are both communicated with an air outlet of the filtering apparatus 1, the nacelle 5 branch pipeline 31 is located inside the nacelle 5, and a portion of the hub 6 branch pipeline 32 is located inside the hub 6. Get into 5 inside air cooling pipelines in cabin 3 and get into 3 branches of air cooling pipelines in wheel hub 6, can make comparatively microthermal air can directly get into 6 insides in wheel hub and cool down, improved the cooling effect, avoid setting up single air cooling pipeline 3 and get into wheel hub 6 again through 5 inside heating element in cabin and make its not good condition to 6 inside cooling effects in wheel hub, improved the holistic cooling effect of cooling system. Of course, in other embodiments, other cooling circuits with better adaptability may be provided.
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 (12)

1. A filtering device is used in an air cooling system of a wind generating set, and is characterized in that the filtering device comprises an air inlet pipeline, an air guiding device and a fan, the air guiding device comprises an annular air guiding channel with an open top, the air inlet pipeline is communicated with the annular air guiding channel, the annular air guiding channel is configured to enable air flowing into the annular air guiding channel from the air inlet pipeline to spirally flow along the axial direction of the annular air guiding channel, an air outlet of the filtering device is positioned on one side of the open top of the annular air guiding channel, and the fan is arranged at the air outlet;
the filtering device comprises a shell, the shell is cylindrical, an air guide cylinder is fixedly arranged in the shell, the air guide cylinder and the shell are coaxially arranged, an annular gap between the air guide cylinder and the shell forms an annular air guide channel, and one end of the air inlet pipeline is connected to the side wall of the shell;
a connecting plate is arranged in the shell, the air duct and the shell are fixed through the connecting plate, and a plurality of air outlets are formed in the surface of the connecting plate;
the bottom of the filtering device is provided with a one-way valve, and the limited direction of the one-way valve is that air in the filtering device flows to the outside.
2. The filtering device as claimed in claim 1, wherein the bottom of the annular air guide channel is provided with a foreign matter discharge port, the bottom of the filtering device is provided with a foreign matter collecting portion, the foreign matter discharge port faces the inside of the foreign matter collecting portion, at least a part of the foreign matter collecting portion is detachable with respect to the filtering device, or the bottom of the foreign matter collecting portion is provided with a cleaning port capable of closing and opening the filtering device.
3. The filtering device as claimed in claim 2, wherein the impurity collecting portion includes an impurity guide wall and a collecting platform, the impurity guide wall is disposed on a side of the impurity discharging port away from the annular air guiding passage, the impurity guide wall encloses and forms an impurity guide passage, a top opening of the impurity guide passage faces the impurity discharging port, a bottom opening of the impurity guide passage faces the collecting platform, the collecting platform is detachable with respect to the filtering device, or the cleaning port is located on the collecting platform.
4. The filtering device as claimed in claim 3, wherein the top end of the impurity guiding wall is connected to the inner side wall of the housing, the impurity guiding wall is surrounded to form a tapered cavity, and the cross-sectional area of the tapered cavity is gradually reduced in a direction away from the annular air guiding passage.
5. The filtration apparatus as claimed in claim 1, further comprising a fine filter assembly, wherein the fine filter assembly comprises a plurality of conical separation cylinders and an air flow passage, the bottom end of the air flow passage is open to the top, the conical separation cylinders are arranged along the axial direction of the air flow passage and are arranged coaxially with the air flow passage, and a secondary air filtering passage is formed between the inner wall of the air flow passage and the side wall of the conical separation cylinder.
6. A filter device as claimed in claim 5, wherein the bottom end of the airflow passage is provided with an impurity receiving pan, one side of which is connected to an inner side wall of the airflow passage and the other side of which extends towards the axis of the airflow passage.
7. The filtering device as claimed in claim 5, wherein a filter screen is disposed at one end of the bottom of the airflow channel or at the top opening of the annular air guiding channel.
8. The filtering device as claimed in claim 1, wherein an end of the air inlet pipe communicating with the annular air guiding passage is tapered, and a cross-sectional area of the taper is gradually reduced in a direction approaching the annular air guiding passage.
9. The filter apparatus as claimed in claim 1, wherein the axial direction of the air inlet pipe is arranged along the tangential direction of the annular air guide passage.
10. A cooling system of a wind generating set, comprising an air cooling pipeline and a driving device, wherein at least a part of the air cooling pipeline is arranged in a cabin and a hub of the wind generating set, an air inlet and an air outlet of the air cooling pipeline are communicated with the outside, and the driving device is connected to the air cooling pipeline and used for driving the air in the air cooling pipeline to flow, characterized in that the cooling system of the wind generating set comprises the filtering device according to any one of claims 1-9, and the filtering device is arranged at the air inlet of the air cooling pipeline.
11. The wind generating set cooling system of claim 10, wherein the air cooling line comprises a nacelle branch line and a hub branch line, the air inlets of the nacelle branch line and the hub branch line are both connected to the air outlet of the filtering device, the nacelle branch line is located inside the nacelle, and a portion of the hub branch line is located inside the hub.
12. A wind park according to claim 10 or 11, wherein the wind park comprises a wind park cooling system.
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