CN113153623A - Wind wheel device and wind generating set - Google Patents

Wind wheel device and wind generating set Download PDF

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Publication number
CN113153623A
CN113153623A CN202110491436.5A CN202110491436A CN113153623A CN 113153623 A CN113153623 A CN 113153623A CN 202110491436 A CN202110491436 A CN 202110491436A CN 113153623 A CN113153623 A CN 113153623A
Authority
CN
China
Prior art keywords
blade root
blade
bearing
end surface
connection end
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110491436.5A
Other languages
Chinese (zh)
Inventor
杨飞
王国军
白宏伟
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Electric Wind Power Group Co Ltd
Original Assignee
Shanghai Electric Wind Power Group Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Electric Wind Power Group Co Ltd filed Critical Shanghai Electric Wind Power Group Co Ltd
Priority to CN202110491436.5A priority Critical patent/CN113153623A/en
Publication of CN113153623A publication Critical patent/CN113153623A/en
Pending legal-status Critical Current

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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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0675—Rotors characterised by their construction elements of the blades
    • 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
    • F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor 
    • F03D1/06—Rotors
    • F03D1/065—Rotors characterised by their construction elements
    • F03D1/0658—Arrangements for fixing wind-engaging parts to a hub
    • 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
    • F03D7/00—Controlling wind motors 
    • F03D7/02—Controlling wind motors  the wind motors having rotation axis substantially parallel to the air flow entering the rotor
    • F03D7/022—Adjusting aerodynamic properties of the blades
    • F03D7/0224—Adjusting blade pitch
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/70—Adjusting of angle of incidence or attack of rotating blades
    • F05B2260/79—Bearing, support or actuation arrangements therefor
    • 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

Abstract

The invention discloses a wind wheel device and a wind generating set, the wind wheel device comprises blades, connecting pieces and a variable-pitch bearing, the blade root of each blade is connected to the variable-pitch bearing through a plurality of connecting pieces, the blade root is provided with a heavy load area, the connecting end of the blade root is provided with a reinforcing part, the reinforcing part is arranged in the heavy load area, the variable-pitch bearing is provided with a connecting part, the connecting part and the reinforcing part are correspondingly arranged, and one part of the connecting pieces are connected with the reinforcing part and the connecting part. The wind wheel device is additionally provided with the reinforcing part in the heavy load area on the blade root connecting end surface, and meanwhile, the connecting part is correspondingly additionally arranged on the variable pitch bearing, so that more space setting connecting pieces are arranged on the blade root and the variable pitch bearing, the outer diameter size of the whole blade root does not need to be increased, the sizes of the variable pitch bearing and the hub which are correspondingly matched with the blade root do not need to be increased, the connecting strength of the blade in the heavy load area and the variable pitch bearing is improved, and the economic benefit is improved.

Description

Wind wheel device and wind generating set
Technical Field
The invention relates to a wind wheel device and a wind generating set.
Background
The blades, the pitch bearing and the hub form a wind wheel device. The blade root of the blade is connected to the variable pitch bearing through a bolt, and the variable pitch bearing is connected to the hub through a bolt. At present, a blade root ring of a wind generating set is provided with a circle of uniformly arranged bolts for connecting to a variable pitch bearing. The bolted connection of the blade root and the pitch bearing becomes a weak point of the wind wheel device structure as wind is transferred to the hub through the blade. As shown in fig. 1. Research shows that the load borne by each bolt is uneven, the bolt in a heavy load area is relatively high in load, and the bolt in a light load area is relatively low in load. Due to the special structure of the blades, when the wind wheel operates, the heavy load area of the blades is arranged on one side of the windward side, and the windward side of the blades is a light load area.
At present, in order to ensure the connection strength of the blade root and the variable pitch bearing, the diameter of the blade root of the blade needs to be set large enough so as to arrange more bolts or arrange bolts with larger diameter. Due to the arrangement, the diameter ratio of the blade root is larger, and the size of the variable pitch bearing and the hub which are correspondingly matched with the blade root is larger, so that the weight of the blade, the variable pitch bearing and the hub is increased, and the manufacturing cost of the wind wheel device is improved.
Disclosure of Invention
The invention aims to overcome the defect that the cost is increased due to the fact that the size of a blade root is integrally increased in order to improve the connection strength of blades in the prior art, and provides a wind wheel device and a wind generating set.
The invention solves the technical problems through the following technical scheme:
a wind wheel device comprises blades, connecting pieces and a variable pitch bearing, wherein the blade root of each blade is connected with the variable pitch bearing through the connecting pieces, the blade root is provided with a heavy load area, the connecting end of the blade root is provided with a reinforcing part, the reinforcing part is arranged in the heavy load area, the variable pitch bearing is provided with a connecting part, the connecting part is correspondingly arranged with the reinforcing part, and one part of the connecting pieces are connected with the reinforcing part and the connecting part.
In the scheme, the wind wheel device is additionally provided with the reinforcing part in the heavy load area on the blade root connecting end surface, and meanwhile, the connecting part is correspondingly additionally arranged on the variable pitch bearing, so that more space is provided for the blade root and the variable pitch bearing to arrange the connecting pieces, the outer diameter size of the whole blade root does not need to be increased, the sizes of the variable pitch bearing and the wheel hub which are correspondingly matched with the blade root do not need to be increased, the connecting strength of the blade in the heavy load area and the variable pitch bearing is improved, and the economic benefit is improved.
Preferably, the pitch bearing comprises an inner bearing ring, and the inner bearing ring is connected to the blade root through the connecting piece.
In the scheme, the inner ring of the variable pitch bearing is used for fixing the blades, the outer ring of the variable pitch bearing is used for being fixed with the hub, and when the inner ring of the bearing and the outer ring of the bearing rotate relatively, the blades can rotate around the axis of the blades.
Preferably, the reinforcing part is disposed on an inner wall surface of the connecting end of the blade root, the reinforcing part extends along a circumferential direction of the blade root, the connecting part is disposed on an inner side of the connecting end of the bearing inner ring, a connecting end surface of the reinforcing part is located in the connecting end surface of the blade root and is close to the inner side, the connecting end surface of the connecting part is located in the connecting end surface of the bearing inner ring and is close to the inner side, and two ends of the connecting part are respectively connected to the connecting end surface of the reinforcing part and the connecting end surface of the connecting part.
In this scheme, adopt above-mentioned structural style, the blade root is inside hollow structure, and the laminating of rib is at the internal face of blade root, and the space that occupies is little in the radial direction, can set up more connecting piece in the heavily loaded district at the circumference direction simultaneously, under the condition that need not to increase the blade root external diameter, improves the blade root and becomes the joint strength of oar bearing.
Preferably, the inner wall of the bearing inner ring is further annularly provided with internal teeth, and the inner side of the connecting part is not provided with the internal teeth.
In the scheme, the structure is adopted, so that enough space is reserved on the connecting part to match with the mounting surface of the reinforcing part of the blade root, and more bolt mounting holes are conveniently formed in the connecting part.
Preferably, the inner wall of the bearing inner ring is further annularly provided with internal teeth.
In the scheme, the structure is adopted, the gear of the driving mechanism is meshed with the internal teeth and drives the bearing inner ring to rotate, and the blade is correspondingly driven to rotate so as to adjust the rotating angle of the blade.
Preferably, the reinforcing part is disposed on the outer wall surface of the blade root, the reinforcing part extends along the circumferential direction of the blade root, the connecting part is disposed on the outer side of the connecting end of the bearing inner ring, the connecting end surface of the reinforcing part is located in the connecting end surface of the blade root and is close to the outer side, the connecting end surface of the connecting part is located in the connecting end surface of the bearing inner ring and is close to the outer side, and two ends of the connecting part are respectively connected to the connecting end surface of the reinforcing part and the connecting end surface of the connecting part.
In this scheme, adopt above-mentioned structural style, the laminating of rib is at the outer wall of blade root, and the space that occupies in the radial direction is little, can set up more connecting piece in the heavy load district at the circumference direction simultaneously, only needs increase blade root local area's external diameter, improves the blade root and becomes the joint strength of oar bearing.
Preferably, the plurality of connecting pieces provided in the reinforcing portion are arranged at intervals in the circumferential direction of the blade root.
In this scheme, the load of blade root terminal surface distributes along the circumferential direction, adopts above-mentioned structural style, can the balanced load that the connecting piece received, improves the joint strength of connecting piece.
Preferably, the wind wheel device further comprises a hub, and the pitch bearing further comprises a bearing outer ring, and the bearing outer ring is connected to the hub through a plurality of bolts.
In the scheme, the outer ring of the variable pitch bearing is used for being fixed with the hub, and the inner ring of the variable pitch bearing is used for fixing the blades. When the bearing inner ring and the bearing outer ring rotate relatively, the blades can rotate around the axes of the blades.
Preferably, the blade has a leading edge and a trailing edge, and the heavy load region is arranged on the windward side of the blade and close to one side of the trailing edge.
In the scheme, due to the special structure of the blades, when the wind wheel operates, the heavy load area of the blades is positioned on one side of the upwind surface, and the downwind surface of the blades is the light load area.
A wind turbine comprising a wind wheel arrangement as described above.
In the scheme, the wind wheel device is only locally structurally reinforced at the blade root so as to improve the connection strength of the blade root in the heavy load area, the diameter of the blade root does not need to be integrally increased, the sizes and the weights of the blade, the variable pitch bearing and the hub which are matched with the wind wheel device are reduced, and the cost of the whole wind turbine generator is further reduced.
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: the wind wheel device is additionally provided with the reinforcing part in the heavy load area on the blade root connecting end surface, and meanwhile, the connecting part is correspondingly additionally arranged on the variable pitch bearing, so that more space setting connecting pieces are arranged on the blade root and the variable pitch bearing, the outer diameter size of the whole blade root does not need to be increased, the sizes of the variable pitch bearing and the hub which are correspondingly matched with the blade root do not need to be increased, the connecting strength of the blade in the heavy load area and the variable pitch bearing is improved, and the economic benefit is improved.
Drawings
Fig. 1 is a schematic structural diagram of a blade and a blade root of the blade in the prior art.
Fig. 2 is a schematic view of a wind turbine apparatus according to embodiments 1 to 3 of the present invention.
Fig. 3 is a schematic view of the root structure of a blade according to embodiments 1 and 2 of the present invention.
Fig. 4 is a schematic structural view of a pitch bearing according to embodiment 1 of the present invention.
Fig. 5 is a schematic structural view of a pitch bearing according to embodiment 2 of the present invention.
Fig. 6 is a schematic view of the structure of the root of a blade according to embodiment 3 of the present invention.
Fig. 7 is a schematic structural view of a pitch bearing according to embodiment 3 of the invention.
Description of reference numerals:
blade 1
Leading edge 101
Trailing edge 102
Upwind surface 103
Leeward side 104
Blade root 11
Reinforcing part 111
Heavy load region 112
Connecting piece 2
Pitch bearing 3
Bearing inner race 31
Connecting part 311
Internal teeth 312
Bearing outer race 32
Hub 4
Detailed Description
The invention will be more clearly and completely described below by way of three embodiments in conjunction with the accompanying drawings, without thereby limiting the invention to the scope of the embodiments described.
Example 1
As shown in fig. 2-4, the present embodiment discloses a wind turbine device comprising a blade 1, a connecting piece 2, a pitch bearing 3 and a hub 4. The blade 1 is provided with a blade root 11, a plurality of connecting pieces 2 are uniformly arranged on the connecting end surface of the blade root 11 in a circle, and the blade root 11 is connected with the variable pitch bearing 3 through the connecting pieces 2. Research shows that the load distribution of each connecting piece 2 is uneven, the connecting piece 2 in the heavy load area 112 is relatively high in load, and the connecting piece 2 in the light load area is relatively low in load.
Under the condition that the outer diameter of the blade root 11 is not increased, in order to improve the connection strength of the blade root 11, a reinforcing part 111 is additionally arranged in a heavy load area 112 of the connection end of the blade root 11, and meanwhile, a connection part 311 corresponding to the reinforcing part 111 is additionally arranged on the variable pitch bearing 3, so that more space is provided for arranging the connecting piece 2 on the blade root 11 and the variable pitch bearing 3. Here, the reinforcing part 111 is provided corresponding to the connecting part 311 in a partial positional correspondence without requiring a complete shape correspondence. The reinforcing part 111 is connected with the connecting part 311 through the connecting part 2, so that the connecting strength of the blade 1 in the heavy load area 112 and the variable pitch bearing 3 is improved, the connecting strength of the blade 1 can be improved without increasing the outer diameter of the whole blade root 11, the sizes of the variable pitch bearing 3 and the hub 4 which are correspondingly matched with the blade root 11 are not increased, and the economic benefit is improved.
As shown in fig. 3, since the interior of the blade root 11 is a hollow structure and the reinforcing portion 111 is provided on the inner wall surface of the connection end of the blade root 11, the existing external dimensions of the blade root 11 do not need to be changed, and the space occupied by the blade root 11 in the radial direction is small. Further, the reinforcing portion 111 extends in the circumferential direction of the blade root 11, and more connecting members 2 can be added in a wider range. As shown in fig. 4, in order to match the position of the reinforcing portion 111, a corresponding connecting portion 311 is provided inside the connecting end of the bearing inner race 31. The connection end surface of the reinforcing portion 111 is located in the connection end surface of the blade root 11 and close to the inner side, so that the reinforcing portion 111 and the blade root 11 are integrally arranged, and the connection strength of the blade root 11 is improved. The connection end surface of the connection portion 311 is located in the connection end surface of the bearing inner ring 31 and close to the inner side, so that the connection portion 311 and the bearing inner ring 31 are integrally arranged, and the connection strength of the bearing inner ring 31 is improved. Both ends of the connector 2 are connected to the connection end surface of the reinforcement 111 and the connection end surface of the connection portion 311, respectively.
Because the load of the end face of the blade root 11 is distributed along the circumferential direction, a plurality of connecting pieces 2 are arranged in the reinforcing part 111, and the connecting pieces 2 are arranged at intervals along the circumferential direction of the blade root 11, the load borne by the connecting pieces 2 can be balanced, and the connecting strength of the connecting pieces 2 is improved.
As shown in fig. 2, the pitch bearing 3 comprises a bearing inner ring 31 and a bearing outer ring 32, the bearing inner ring 31 is connected to the blade root 11 through a connecting piece 2, and the bearing outer ring 32 is connected to the hub 4 through a plurality of bolts. The inner ring of the variable pitch bearing 3 is used for fixing the blade 1, and the outer ring of the variable pitch bearing 3 is used for fixing the hub 4. When the bearing inner ring 31 and the bearing outer ring 32 rotate relatively, the blade 1 can rotate around the axis thereof.
As shown in fig. 4. The inner wall of the inner race 31 is further provided with internal teeth 312, and the inner side of the connecting portion 311 of the inner race 31 is not provided with internal teeth 312, so that there is enough space on the connecting portion 311 to match the mounting surface of the reinforcement portion 111 of the blade root 11, so as to provide more connecting members 2. The gear of the variable pitch driving mechanism is engaged with the internal teeth 312 and drives the bearing inner ring 31 to rotate, so that the blade 1 is correspondingly driven to rotate, the angle of the blade 1 rotating around the axis of the blade 1 is adjusted, and the purpose of changing the pitch of the blade 1 is achieved.
As shown in fig. 1, due to the special structure of the blade 1, when the wind wheel is in operation, the heavy load area 112 of the blade 1 is on the windward side 103, and the leeward side 104 of the blade 1 is a light load area. Specifically, if the blade 1 is divided into the leading edge 101 and the trailing edge 102, the heavy load region 112 is located on the windward side 103 of the blade 1 and near the trailing edge 102. Further, the heavy load zone 112 is in the region of 190 ° to 240 °.
In other embodiments, if the root 11 has multiple heavy load regions 112, a corresponding reinforcement 111 may be added to each heavy load region 112, with the addition of the connector 2 within the reinforcement 111 to strengthen the heavy load regions 112.
In the present embodiment, the connecting member 2 is a bolt.
In the present embodiment, the reinforcement portion 111 is integrally formed with the blade root 11, and the reinforcement portion 111 is formed by laying a plurality of layers.
The embodiment also discloses a wind turbine which comprises the wind wheel device. The wind wheel device only needs to be locally structurally reinforced at the blade root 11 so as to improve the connection strength of the blade root 11 in the heavy load area 112, the diameter of the blade root 11 does not need to be integrally increased, the size and the weight of the blade 1, the variable pitch bearing 3 and the hub 4 which are matched with the wind wheel device are reduced, and the cost of the whole wind turbine generator is further reduced.
Example 2
As shown in fig. 2, 3 and 5, the present embodiment discloses a wind turbine apparatus comprising a blade 1, a connecting member 2, a pitch bearing 3 and a hub 4. The blade 1 is provided with a blade root 11, a plurality of connecting pieces 2 are uniformly arranged on the connecting end surface of the blade root 11 in a circle, and the blade root 11 is connected with the variable pitch bearing 3 through the connecting pieces 2. Research shows that the load distribution of each connecting piece 2 is uneven, the connecting piece 2 in the heavy load area 112 is relatively high in load, and the connecting piece 2 in the light load area is relatively low in load.
Under the condition that the outer diameter of the blade root 11 is not increased, in order to improve the connection strength of the blade root 11, a reinforcing part 111 is additionally arranged in a heavy load area 112 of the connection end of the blade root 11, and meanwhile, a connection part 311 corresponding to the reinforcing part 111 is additionally arranged on the variable pitch bearing 3, so that more space is provided for arranging the connecting piece 2 on the blade root 11 and the variable pitch bearing 3. Here, the reinforcing part 111 is provided corresponding to the connecting part 311 in a partial structural position correspondence without a shape complete correspondence. The reinforcing part 111 is connected with the connecting part 311 through the connecting part 2, so that the connecting strength of the blade 1 in the heavy load area 112 and the variable pitch bearing 3 is improved, the connecting strength of the blade 1 can be improved without increasing the outer diameter of the whole blade root 11, the sizes of the variable pitch bearing 3 and the hub 4 which are correspondingly matched with the blade root 11 are not increased, and the economic benefit is improved.
As shown in fig. 3, since the interior of the blade root 11 is a hollow structure and the reinforcing portion 111 is provided on the inner wall surface of the connection end of the blade root 11, the existing external dimensions of the blade root 11 do not need to be changed, and the space occupied by the blade root 11 in the radial direction is small. Further, the reinforcing portion 111 extends in the circumferential direction of the blade root 11, and more connecting members 2 can be added in a wider range. As shown in fig. 4, in order to match the position of the reinforcing portion 111, a corresponding connecting portion 311 is provided inside the connecting end of the bearing inner race 31. The connection end surface of the reinforcement part 111 is located in the connection end surface of the blade root 11 and is close to the inner side, so that the reinforcement part 111 and the blade root 11 are integrally arranged, and the connection strength of the blade root 11 is improved. The connection end surface of the connection portion 311 is located in the connection end surface of the bearing inner ring 31 and close to the inner side, so that the connection portion 311 and the bearing inner ring 31 are integrally arranged, and the connection strength of the bearing inner ring 31 is improved. Both ends of the connector 2 are connected to the connection end surface of the reinforcement 111 and the connection end surface of the connection portion 311, respectively.
Because the load of the end face of the blade root 11 is distributed along the circumferential direction, a plurality of connecting pieces 2 are arranged in the reinforcing part 111, and the connecting pieces 2 are arranged at intervals along the circumferential direction of the blade root 11, the load borne by the connecting pieces 2 can be balanced, and the connecting strength of the connecting pieces 2 is improved.
As shown in fig. 2, the pitch bearing 3 comprises a bearing inner ring 31 and a bearing outer ring 32, the bearing inner ring 31 is connected to the blade root 11 through a connecting piece 2, and the bearing outer ring 32 is connected to the hub 4 through a plurality of bolts. The inner ring of the variable pitch bearing 3 is used for fixing the blade 1, and the outer ring of the variable pitch bearing 3 is used for fixing the hub 4. When the bearing inner ring 31 and the bearing outer ring 32 rotate relatively, the blade 1 can be pitched.
As shown in fig. 5, in order to ensure the integrity of the inner ring gear of the pitch bearing 3, the bearing inner ring 31 is widened, and a full circle of inner teeth 312 are annularly arranged on the inner wall of the bearing inner ring 31, so that the pitch of the blade 1 is facilitated. The gear of the variable pitch driving mechanism is meshed with the inner teeth 312, and drives the bearing inner ring 31 to rotate, so that the blade 1 is correspondingly driven to rotate, the angle of the blade 1 rotating around the axis of the blade 1 is adjusted, and the purpose of changing the pitch of the blade is achieved.
As shown in fig. 1, due to the special structure of the blade 1, when the wind wheel is in operation, the heavy load area 112 of the blade 1 is on the windward side 103, and the leeward side 104 of the blade 1 is a light load area. Specifically, if the blade 1 is divided into the leading edge 101 and the trailing edge 102, the heavy load region 112 is located on the windward side 103 of the blade 1 and near the trailing edge 102. Further, the heavy load zone 112 is in the region of 190 ° to 240 °.
In other embodiments, if the root 11 has multiple heavy load regions 112, a corresponding reinforcement 111 may be added to each heavy load region 112, with the addition of the connector 2 within the reinforcement 111 to strengthen the heavy load regions 112.
In the present embodiment, the connecting member 2 is a bolt.
In the present embodiment, the reinforcement portion 111 is integrally formed with the blade root 11, and the reinforcement portion 111 is formed by laying a plurality of layers.
The embodiment also discloses a wind turbine which comprises the wind wheel device. The wind wheel device only needs to be locally structurally reinforced at the blade root 11 so as to improve the connection strength of the blade root 11 in the heavy load area 112, the diameter of the blade root 11 does not need to be integrally increased, the size and the weight of the blade 1, the variable pitch bearing 3 and the hub 4 which are matched with the wind wheel device are reduced, and the cost of the whole wind turbine generator is further reduced.
Example 3
As shown in fig. 2, 6 and 7, the present embodiment discloses a wind turbine apparatus comprising a blade 1, a connecting member 2, a pitch bearing 3 and a hub 4. The blade 1 is provided with a blade root 11, a plurality of connecting pieces 2 are uniformly arranged on the connecting end surface of the blade root 11 in a circle, and the blade root 11 is connected with the variable pitch bearing 3 through the connecting pieces 2. Research shows that the load distribution of each connecting piece 2 is uneven, the connecting piece 2 in the heavy load area 112 is relatively high in load, and the connecting piece 2 in the light load area is relatively low in load.
Under the condition that the outer diameter of the blade root 11 is not increased, in order to improve the connection strength of the blade root 11, a reinforcing part 111 is additionally arranged in a heavy load area 112 of the connection end of the blade root 11, and meanwhile, a connection part 311 corresponding to the reinforcing part 111 is additionally arranged on the variable pitch bearing 3, so that more space is provided for arranging the connecting piece 2 on the blade root 11 and the variable pitch bearing 3. The reinforcement 111 is provided corresponding to the connection portion 311, and is corresponding in position without requiring a complete shape. The reinforcing part 111 is connected with the connecting part 311 through the connecting part 2, so that the connecting strength of the blade 1 in the heavy load area 112 and the variable pitch bearing 3 is improved, the connecting strength of the blade 1 can be improved without increasing the outer diameter of the whole blade root 11, the sizes of the variable pitch bearing 3 and the hub 4 which are correspondingly matched with the blade root 11 are not increased, and the economic benefit is improved.
The reinforcing part 111 is arranged on the outer wall surface of the blade root 11, so that the radial size of the blade root 11 is increased only locally, the overall appearance diameter of the blade root 11 does not need to be increased, and the cost of the wind wheel device is reduced. Further, the reinforcing part 111 extends along the circumferential direction of the blade root 11, so that more connecting pieces 2 can be added in a larger range, and the connecting strength between the blade root 11 and the variable pitch bearing 3 is improved. In order to match the position of the reinforcing portion 111, a corresponding connecting portion 311 is provided outside the connecting end of the bearing inner race 31. The connection end surface of the reinforcement part 111 is located in the connection end surface of the blade root 11 and is close to the outer side, so that the reinforcement part 111 and the blade root 11 are integrally arranged, and the connection strength of the blade root 11 is improved. The connection end surface of the connection portion 311 is located in the connection end surface of the bearing inner ring 31 and close to the outer side, so that the connection portion 311 and the bearing inner ring 31 are integrally arranged, and the connection strength of the bearing inner ring 31 is improved. Both ends of the connector 2 are connected to the connection end surface of the reinforcing portion 111 and the connection end surface of the connection portion 311, respectively.
Because the load of the end face of the blade root 11 is distributed along the circumferential direction, a plurality of connecting pieces 2 are arranged in the reinforcing part 111, and the connecting pieces 2 are arranged at intervals along the circumferential direction of the blade root 11, the load borne by the connecting pieces 2 can be balanced, and the connecting strength of the connecting pieces 2 is improved.
As shown in fig. 2, the pitch bearing 3 comprises a bearing inner ring 31 and a bearing outer ring 32, the bearing inner ring 31 is connected to the blade root 11 through a connecting piece 2, and the bearing outer ring 32 is connected to the hub 4 through a plurality of bolts. The inner ring of the variable pitch bearing 3 is used for fixing the blade 1, and the outer ring of the variable pitch bearing 3 is used for fixing the hub 4. When the bearing inner ring 31 and the bearing outer ring 32 rotate relatively, the blade 1 can be pitched.
As shown in fig. 1, due to the special structure of the blade 1, when the wind wheel is in operation, the heavy load area 112 of the blade 1 is on the windward side 103, and the leeward side 104 of the blade 1 is a light load area. Specifically, if the blade 1 is divided into the leading edge 101 and the trailing edge 102, the heavy load region 112 is located on the windward side 103 of the blade 1 and near the trailing edge 102. Further, the heavy load zone 112 is in the region of 190 ° to 240 °.
In other embodiments, if the root 11 has multiple heavy load regions 112, a corresponding reinforcement 111 may be added to each heavy load region 112, with the addition of the connector 2 within the reinforcement 111 to strengthen the heavy load regions 112.
In the present embodiment, the connecting member 2 is a bolt.
In the present embodiment, the reinforcement portion 111 is integrally formed with the blade root 11, and the reinforcement portion 111 is formed by laying a plurality of layers.
The embodiment also discloses a wind turbine which comprises the wind wheel device. The wind wheel device only needs to be locally structurally reinforced at the blade root 11 so as to improve the connection strength of the blade root 11 in the heavy load area 112, the diameter of the blade root 11 does not need to be integrally increased, the size and the weight of the blade 1, the variable pitch bearing 3 and the hub 4 which are matched with the wind wheel device are reduced, and the cost of the whole wind turbine generator is further reduced.
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 (10)

1. The utility model provides a wind wheel device, its includes blade, connecting piece and becomes oar bearing, the blade root of blade passes through a plurality of the connecting piece connect in become the oar bearing, the blade root has the heavy load district, its characterized in that, the link of blade root has the rib, the rib is located heavy load district, it has connecting portion to become the oar bearing, connecting portion with the rib corresponds the setting, partly the connecting piece is connected the rib with connecting portion.
2. The wind turbine device of claim 1, wherein the pitch bearing comprises an inner bearing ring connected to the blade root by the connection piece.
3. The wind turbine device according to claim 2, wherein the reinforcing portion is provided on an inner wall surface of the connection end of the blade root, the reinforcing portion extends in a circumferential direction of the blade root, the connection portion is provided inside the connection end of the inner bearing ring, a connection end surface of the reinforcing portion is located in and near the connection end surface of the blade root, a connection end surface of the connection portion is located in and near the connection end surface of the inner bearing ring, and both ends of the connection member are connected to the connection end surface of the reinforcing portion and the connection end surface of the connection portion, respectively.
4. The wind turbine device according to claim 3, wherein the inner wall of the bearing inner ring is further annularly provided with internal teeth, and the inner side of the connecting part is not provided with internal teeth.
5. The wind turbine device according to claim 3, wherein the inner wall of the bearing inner ring is further annularly provided with internal teeth.
6. The wind turbine device according to claim 2, wherein the reinforcement portion is provided on an outer wall surface of the blade root, the reinforcement portion extends in a circumferential direction of the blade root, the connection portion is provided outside the connection end of the inner bearing ring, a connection end surface of the reinforcement portion is located in and near the connection end surface of the blade root, a connection end surface of the connection portion is located in and near the connection end surface of the inner bearing ring, and both ends of the connection member are connected to the connection end surface of the reinforcement portion and the connection end surface of the connection portion, respectively.
7. The wind turbine device according to claim 1, wherein a plurality of the connection members provided in the reinforcement portion are provided at intervals in a circumferential direction of the blade root.
8. The wind wheel device according to claim 1, wherein the wind wheel device further comprises a hub, and the pitch bearing further comprises a bearing outer ring, and the bearing outer ring is connected to the hub through a plurality of bolts.
9. A wind turbine according to any of claims 1-8, where the blade has a leading edge and a trailing edge, and where the heavy load zone is located on the upwind side of the blade, near the trailing edge.
10. Wind turbine, characterized in that it comprises a wind wheel arrangement according to any of claims 1-9.
CN202110491436.5A 2021-05-06 2021-05-06 Wind wheel device and wind generating set Pending CN113153623A (en)

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CN202110491436.5A CN113153623A (en) 2021-05-06 2021-05-06 Wind wheel device and wind generating set

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110491436.5A CN113153623A (en) 2021-05-06 2021-05-06 Wind wheel device and wind generating set

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CN202110491436.5A Pending CN113153623A (en) 2021-05-06 2021-05-06 Wind wheel device and wind generating set

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114320781A (en) * 2022-01-05 2022-04-12 上海电气风电集团股份有限公司 Blade structure of wind driven generator, manufacturing method of blade structure and wind driven generator

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114320781A (en) * 2022-01-05 2022-04-12 上海电气风电集团股份有限公司 Blade structure of wind driven generator, manufacturing method of blade structure and wind driven generator

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