CN113464363B - Hydraulic variable pitch system for wind generating set and wind generating set - Google Patents
Hydraulic variable pitch system for wind generating set and wind generating set Download PDFInfo
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- CN113464363B CN113464363B CN202110871309.8A CN202110871309A CN113464363B CN 113464363 B CN113464363 B CN 113464363B CN 202110871309 A CN202110871309 A CN 202110871309A CN 113464363 B CN113464363 B CN 113464363B
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- 238000009434 installation Methods 0.000 abstract description 8
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 230000000712 assembly Effects 0.000 description 2
- 238000000429 assembly Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 241000282414 Homo sapiens Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000008569 process 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
- 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
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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
- F03D1/0691—Rotors characterised by their construction elements of the hub
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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
- 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
- F05B2260/76—Adjusting of angle of incidence or attack of rotating blades the adjusting mechanism using auxiliary power sources
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- 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
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- 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
- F05B2270/00—Control
- F05B2270/60—Control system actuates through
- F05B2270/604—Control system actuates through hydraulic actuators
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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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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Wind Motors (AREA)
Abstract
The embodiment of the invention provides a hydraulic pitch control system for a wind generating set and the wind generating set. The hydraulic pitch control system comprises an outer ring bearing, an inner ring bearing, an outer driving rotating plate, an inner driving rotating plate, an outer ring driving oil cylinder and an inner ring driving oil cylinder. The rotating centers of the outer ring bearing and the inner ring bearing are overlapped, the outer ring of the outer ring bearing is connected with the hub, the inner ring of the outer ring bearing is connected with the external drive rotating plate, the outer ring of the inner ring bearing is connected with the external drive rotating plate, the inner ring of the inner ring bearing is connected with the internal drive rotating plate, the outer ring drive oil cylinder is used for driving the external drive rotating plate to rotate around the rotating center when the outer ring bearing extends or retracts, and the inner ring drive oil cylinder is used for driving the internal drive rotating plate and the external drive rotating plate to synchronously rotate around the rotating center when the inner ring bearing extends or retracts. The hydraulic pitch control system and the wind generating set provided by the embodiment of the invention can reduce the size of the driving oil cylinder, and are beneficial to installation and replacement of the driving oil cylinder.
Description
Technical Field
The embodiment of the invention relates to the technical field of wind generating set variable pitch, in particular to a hydraulic variable pitch system for a wind generating set and the wind generating set.
Background
With the gradual depletion of energy sources such as coal and petroleum, human beings increasingly pay more attention to the utilization of renewable energy sources. Wind energy is increasingly gaining attention as a clean renewable energy source in all countries of the world. The wind power generation device is very suitable for and can be used for generating electricity by utilizing wind power according to local conditions in coastal islands, grassland pasturing areas, mountain areas and plateau areas with water shortage, fuel shortage and inconvenient traffic. Wind power generation refers to converting kinetic energy of wind into electric energy by using a wind generating set.
With the continuous progress of wind power technology and the gradual development of offshore wind power, the single machine capacity of the wind generating set is larger and larger, and the volume of a variable pitch system of the wind generating set is also increased continuously. The variable pitch system is used as an important actuating mechanism for power control and safe operation of the wind generating set, and plays an important role in the operation of the wind generating set. The pitch system of a wind generating set is generally divided into a hydraulic pitch system and an electric pitch system. Compared with an electric variable pitch system, the hydraulic variable pitch system has the advantages of quicker response and larger torque, does not need a variable speed transmission mechanism, and has simpler whole hub composition structure.
However, as the overall size of a driving hydraulic cylinder in the hydraulic variable-pitch system is increased, the manufacturing and machining difficulty of the hydraulic cylinder is increased. Installation of hydraulic rams, particularly replacement of hydraulic rams on already operating wind turbine generators, in confined installation spaces is a challenge in the industry. Moreover, the larger the cylinder volume, the more difficult the replacement process.
Disclosure of Invention
The embodiment of the invention aims to provide a hydraulic pitch control system for a wind generating set and the wind generating set, which can reduce the size of a driving oil cylinder and are beneficial to installation and replacement of the driving oil cylinder.
One aspect of an embodiment of the present invention provides a hydraulic pitch system for a wind turbine generator set. The hydraulic pitch control system comprises an outer ring bearing, an inner ring bearing, an outer driving rotating plate, an inner driving rotating plate, an outer ring driving oil cylinder and an inner ring driving oil cylinder. The rotation centers of the outer ring bearing and the inner ring bearing are coincident, the outer ring of the outer ring bearing is connected with the hub, the inner ring of the outer ring bearing is connected with the outer driving rotating plate, the outer ring of the inner ring bearing is connected with the outer driving rotating plate, the inner ring of the inner ring bearing is connected with the inner driving rotating plate, the outer ring driving oil cylinder is used for driving the outer driving rotating plate to rotate around the rotation center when the outer ring driving oil cylinder extends or retracts, and the inner ring driving oil cylinder is used for driving the inner driving rotating plate and the outer driving rotating plate to synchronously rotate around the rotation center when the inner ring driving oil cylinder extends or retracts.
Furthermore, two ends of the outer ring driving oil cylinder are respectively connected to the inner driving rotating plate and the outer driving rotating plate, and two ends of the inner ring driving oil cylinder are respectively connected to the hub and the inner driving rotating plate.
Further, the hydraulic pitch system further comprises an intermediate connecting support. The middle connecting support is connected with the inner driving rotating plate, and one end of the inner ring driving oil cylinder and one end of the outer ring driving oil cylinder are connected to the inner driving rotating plate through the middle connecting support respectively.
Further, the hydraulic pitch system also comprises a hub supporting seat. The hub supporting seat is connected with the hub, and the other end of the inner ring driving oil cylinder is connected to the hub through the hub supporting seat.
Furthermore, the inner ring driving oil cylinder comprises a rodless cavity and a rod cavity which is inserted into the rodless cavity and can move relative to the rodless cavity, the rodless cavity of the inner ring driving oil cylinder is connected to the hub supporting seat through a pin shaft, and the rod cavity of the inner ring driving oil cylinder is connected to the middle connecting support through a pin shaft.
Further, the hydraulic pitch system further comprises an outer ring connecting support. The outer ring connecting support is connected with the outer driving rotating plate, and the other end of the outer ring driving oil cylinder is connected to the outer driving rotating plate through the outer ring connecting support.
Furthermore, the outer ring driving oil cylinder comprises a rodless cavity and a rod cavity which is inserted into the rodless cavity and can move relative to the rodless cavity, the rodless cavity of the outer ring driving oil cylinder is connected to the middle connecting support through a pin shaft, and the rod cavity of the outer ring driving oil cylinder is connected to the outer ring connecting support through a pin shaft.
Further, the hydraulic pitch control system comprises a plurality of driving oil cylinder groups, and each driving oil cylinder group comprises the outer ring driving oil cylinder and the inner ring driving oil cylinder.
Further, the plurality of driving cylinder groups includes two, and the two driving cylinder groups are symmetrically distributed with respect to the rotation center.
Another aspect of an embodiment of the present invention provides a wind turbine generator system. The wind generating set comprises the hydraulic pitch control system for the wind generating set and the blades, and the blades are connected to the inner ring of the outer ring bearing of the hydraulic pitch control system.
According to the hydraulic pitch control system for the wind generating set and the wind generating set with the hydraulic pitch control system in one or more embodiments of the invention, the outer ring bearing and the inner ring bearing are adopted, and the inner driving rotating plate and the outer driving rotating plate are respectively driven by the inner ring driving oil cylinder and the outer ring driving oil cylinder, so that the length and the diameter of the driving oil cylinder can be reduced in a limited installation space, the difficulty in installation and replacement of the driving oil cylinder is reduced, and the problem that the rotation radius of an oil cylinder driving point is seriously limited is solved.
In addition, the hydraulic pitch control system for the wind generating set and the wind generating set with the hydraulic pitch control system in one or more embodiments of the invention have the advantages that the strength of the inner driving rotating plate and the outer driving rotating plate is enhanced due to the addition of the inner ring bearing. Also, the thickness of the inner and outer driving rotation plates can be appropriately reduced, so that the overall weight of the driving rotation plate can be reduced.
Drawings
FIG. 1 is a schematic view of a hydraulic pitch system for a wind turbine generator set according to an embodiment of the present invention;
FIG. 2 is another schematic view of a hydraulic pitch system according to an embodiment of the invention;
FIG. 3 is yet another schematic view of a hydraulic pitch system according to an embodiment of the present invention;
FIGS. 4 and 5 are schematic views of the inner and outer ring drive cylinders in a retracted state, in which the hubs are shown in FIG. 4 and removed in FIG. 5, in accordance with an embodiment of the present invention;
fig. 6 and 7 are schematic views of the inner and outer ring drive cylinders in an extended state according to an embodiment of the present invention, in which the wheel hubs are included in fig. 6 and removed in fig. 7.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus consistent with certain aspects of the invention, as detailed in the appended claims.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Unless otherwise defined, technical or scientific terms used in the embodiments of the present invention should have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. The use of "first," "second," and similar terms in the description and in the claims does not indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. "plurality" or "a number" means two or more. Unless otherwise indicated, "front," "back," "lower," and/or "upper," and the like are for convenience of description, and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
The embodiment of the invention provides a hydraulic pitch control system 100 for a wind generating set. Fig. 1 to 3 disclose a schematic view of a hydraulic pitch system 100 for a wind park according to an embodiment of the present invention. As shown in fig. 1 to 3, a hydraulic pitch system 100 for a wind turbine generator system according to an embodiment of the present invention includes an outer ring bearing 11, an inner ring bearing 12, an outer driving rotating plate 21, an inner driving rotating plate 22, an outer ring driving cylinder 31, and an inner ring driving cylinder 32. The rotation centers of the outer ring bearing 11 and the inner ring bearing 12 are coincident with each other.
The outer ring bearing 11 has an outer ring and an inner ring, wherein the outer ring of the outer ring bearing 11 is connected to the hub 200, and the inner ring of the outer ring bearing 11 is connected to the outer drive rotating plate 21.
The inner ring bearing 12 has an outer ring and an inner ring, wherein the outer ring of the inner ring bearing 12 is connected to the outer drive rotor plate 21 and the inner ring of the inner ring bearing 12 is connected to the inner drive rotor plate 22.
The outer ring drive cylinder 31 may be used to drive the outer drive rotating plate 21 to rotate about the center of rotation when extended or retracted, and the inner ring drive cylinder 32 may be used to drive the inner drive rotating plate 22 and the outer drive rotating plate 21 to rotate synchronously about the center of rotation when extended or retracted.
The direction of the outer driving rotation plate 21 driven to rotate when the outer ring driving cylinder 31 extends or contracts is the same as the direction of the inner driving rotation plate 22 and the outer driving rotation plate 21 driven to synchronously rotate when the inner ring driving cylinder 32 extends or contracts, and the angle of the outer driving rotation plate 21 driven to rotate when the outer ring driving cylinder 31 extends or contracts is superposed with the angle of the inner driving rotation plate 22 and the outer driving rotation plate 21 driven to rotate when the inner ring driving cylinder 32 extends or contracts. The outer ring driving oil cylinder 31 and the inner ring driving oil cylinder 32 act in a matched mode, and 90-degree rotation can be achieved.
The hydraulic pitch control system 100 of the embodiment of the invention can fully utilize the service efficiency of the oil cylinder by selecting the proper length of the oil cylinder and the distance of the rotation center.
In some embodiments, the two ends of the outer ring driving cylinder 31 are connected to the inner driving rotating plate 22 and the outer driving rotating plate 21, respectively, so that the outer driving rotating plate 21 can be driven to rotate by the extension and contraction of the outer ring driving cylinder 31. Both ends of the inner ring driving oil cylinder 32 are respectively connected to the hub 200 and the inner driving rotating plate 22, so that the inner driving rotating plate 22 and the outer driving rotating plate 21 can be driven to synchronously rotate by the extension and contraction of the inner ring driving oil cylinder 32, and the whole hydraulic pitch system 100 rotates together.
The inner ring drive cylinder 32 and the outer ring drive cylinder 31 can be controlled by two electrically controlled proportional valves respectively. The two electrically controlled proportional valves can be arranged on the same hydraulic valve group, and the electrically controlled proportional valves on the hydraulic valve group can be controlled by an electric control system. The two electrically controlled proportional valves can independently control the speed and the moving direction of the inner ring drive cylinder 32 and the outer ring drive cylinder 31. Thus, the actions of the inner ring drive cylinder 32 and the outer ring drive cylinder 31 may not be affected by each other.
In other embodiments of the present invention, as shown in fig. 3, the hydraulic pitch system 100 may include a plurality of drive cylinder sets 30, wherein each drive cylinder set 30 includes the outer ring drive cylinder 31 and the inner ring drive cylinder 32 described above. The plurality of drive cylinder groups 30 may be distributed at equal angles with respect to the rotation centers of the outer ring bearing 11 and the inner ring bearing 12. The plurality of driving oil cylinder groups 30 can jointly drive the inner driving rotating plate 22 and the outer driving rotating plate 21 to rotate, and the rotation angles of the plurality of driving oil cylinder groups 30 driving the inner driving rotating plate 22 and the outer driving rotating plate 21 can be overlapped with each other, so that the 90-degree rotation of the whole hydraulic pitch control system 100 is realized.
For the plurality of drive cylinder groups 30, the inner ring drive cylinders 32 and the outer ring drive cylinders 31 thereof can be operated individually, while the inner ring drive cylinders 32 of the plurality of drive cylinder groups 30 are operated simultaneously, and the outer ring drive cylinders 31 of the plurality of drive cylinder groups 30 are operated simultaneously.
In the illustrated embodiment, the plurality of drive cylinder groups 30 of the embodiment of the present invention may include, for example, two. The two drive cylinder groups 30 are symmetrically distributed with respect to the rotation center. The forces applied by the two drive cylinder assemblies 30 are symmetrical so that substantially no force is applied to the bearings by the two drive cylinder assemblies 30.
Fig. 4 and 5 show the inner ring drive cylinder 32 and the outer ring drive cylinder 31 in a retracted state according to an embodiment of the present invention, wherein the wheel hub 200 is included in fig. 4, and the wheel hub 200 is removed in fig. 5. Fig. 6 and 7 show the inner ring drive cylinder 32 and the outer ring drive cylinder 31 in an extended state according to an embodiment of the present invention, wherein the hub 200 is included in fig. 6 and the hub 200 is removed in fig. 7. As shown in fig. 6 and 7 with reference to fig. 4 and 5, when the inner ring driving cylinder 32 of the driving cylinder group 30 extends alone, the inner ring driving cylinder 32 drives the inner driving rotating plate 22 to rotate counterclockwise, and at the same time, the inner driving rotating plate 22 pushes the outer driving rotating plate 21 to rotate counterclockwise synchronously, so that the inner ring driving cylinder 32 drives the entire hydraulic pitch system 100 to rotate, the inner driving rotating plate 22 and the outer driving rotating plate 21 rotate at the same angular velocity, and the inner driving rotating plate 22 and the outer driving rotating plate 21 are relatively stationary. When the outer ring driving cylinder 31 of the driving cylinder group 30 extends alone, the outer ring driving cylinder 31 can drive the outer driving rotating plate 21 to rotate counterclockwise, the inner driving rotating plate 22 is stationary relative to the hub 200, and the outer driving rotating plate 21 and the inner driving rotating plate 22 rotate relative to each other. Thereby, rotation of hydraulic pitch system 100 is achieved.
In some embodiments, hydraulic pitch system 100 of embodiments of the present invention further includes an intermediate connection bracket 42, intermediate connection bracket 42 being connected to inner drive rotating plate 22. Wherein, one end of the inner ring driving cylinder 32 and one end of the outer ring driving cylinder 31 are connected to the inner driving rotation plate 22 through the intermediate connection bracket 42, respectively.
In some embodiments, hydraulic pitch system 100 of the present invention further includes a hub support base 41, and hub support base 41 is connected to hub 200. Wherein, the other end of the inner ring driving cylinder 32 is connected to the hub 200 through the hub support 41.
As shown in fig. 7, in one embodiment, the inner ring drive cylinder 32 includes a rod-less chamber 321 and a rod chamber 322 inserted in the rod-less chamber 321 and movable relative to the rod-less chamber 321. Wherein, the rod-free cavity 321 of the inner ring driving cylinder 32 is connected to the hub supporting seat 41 through a pin shaft (not numbered), and the rod-containing cavity 322 of the inner ring driving cylinder 32 is connected to the intermediate connecting bracket 42 through a pin shaft (not numbered).
In some embodiments, the hydraulic pitch system 100 of the present embodiment further includes an outer ring connection bracket 43, the outer ring connection bracket 43 being connected with the outer drive rotation plate 21. Wherein, the other end of the outer ring driving cylinder 31 is connected to the outer driving rotating plate 21 through the outer ring connecting bracket 43.
As shown in fig. 7, in one embodiment, the outer ring drive cylinder 31 includes a rod-less chamber 311 and a rod chamber 312 inserted in the rod-less chamber 311 and movable relative to the rod-less chamber 311. The rodless chamber 311 of the outer ring drive cylinder 31 is connected to the intermediate connecting bracket 42 by a pin (not numbered), and the rod chamber 312 of the outer ring drive cylinder 31 is connected to the outer ring connecting bracket 43 by a pin (not numbered).
According to the hydraulic pitch control system 100 for the wind generating set, which is disclosed by the embodiment of the invention, the outer ring bearing 11 and the inner ring bearing 12 are adopted, and the inner driving rotating plate 22 and the outer driving rotating plate 21 are respectively driven by the inner ring driving oil cylinder 32 and the outer ring driving oil cylinder 31, so that the length and the diameter of the driving oil cylinder can be reduced in a limited installation space, the difficulty in installation and replacement of the driving oil cylinder is reduced, and the problem that the rotation radius of an oil cylinder driving point is seriously limited is solved.
In addition, the hydraulic pitch system 100 for the wind generating set according to the embodiment of the invention increases the strength of the inner driving rotating plate 22 and the outer driving rotating plate 21 due to the addition of the inner ring bearing 12. Also, the thicknesses of the inner and outer drive rotation plates 22 and 21 can be appropriately reduced, so that the overall weight of the drive rotation plate can be reduced.
The embodiment of the invention also provides a wind generating set. The wind power plant comprises a hydraulic pitch system 100 for a wind power plant as described in the various embodiments above and a blade (not shown), wherein the blade is connected to an inner ring of an outer ring bearing 11 of the hydraulic pitch system 100. Thus, hydraulic pitch system 100 may drive the blades to rotate.
The wind generating set of the embodiment of the invention has similar beneficial technical effects to the hydraulic pitch control system 100 described above, and therefore, the details are not repeated herein.
The hydraulic pitch control system for the wind generating set and the wind generating set provided by the embodiment of the invention are described in detail above. The hydraulic pitch system for a wind generating set and the wind generating set of the embodiments of the present invention are described herein by using specific examples, and the description of the above embodiments is only for helping understanding the core idea of the present invention, and is not intended to limit the present invention. It should be noted that, for those skilled in the art, various improvements and modifications can be made without departing from the spirit and principle of the present invention, and these improvements and modifications should fall within the scope of the appended claims.
Claims (10)
1. The utility model provides a hydraulic pressure becomes oar system for wind generating set which characterized in that: it comprises the following steps: the outer ring bearing and the inner ring bearing are coincided, the outer ring of the outer ring bearing is connected with a hub, the inner ring of the outer ring bearing is connected with the outer driving rotating plate, the outer ring of the inner ring bearing is connected with the outer driving rotating plate, the inner ring of the inner ring bearing is connected with the inner driving rotating plate, the outer ring driving oil cylinder is used for driving the outer driving rotating plate to rotate around the rotating center when the outer ring bearing extends or retracts, and the inner ring driving oil cylinder is used for driving the inner driving rotating plate and the outer driving rotating plate to synchronously rotate around the rotating center when the outer ring bearing extends or retracts.
2. The hydraulic pitch system of claim 1, wherein: the two ends of the outer ring driving oil cylinder are respectively connected to the inner driving rotating plate and the outer driving rotating plate, and the two ends of the inner ring driving oil cylinder are respectively connected to the hub and the inner driving rotating plate.
3. The hydraulic pitch system of claim 2, wherein: it still includes:
a middle connecting bracket connected with the inner driving rotating plate,
one end of the inner ring driving oil cylinder and one end of the outer ring driving oil cylinder are connected to the inner driving rotating plate through the middle connecting support respectively.
4. The hydraulic pitch system of claim 3, wherein: it still includes:
a hub support seat connected with the hub,
the other end of the inner ring driving oil cylinder is connected to the hub through the hub supporting seat.
5. The hydraulic pitch system of claim 4, wherein: the inner ring driving oil cylinder comprises a rodless cavity and a rod cavity which is inserted into the rodless cavity and can move relative to the rodless cavity, the rodless cavity of the inner ring driving oil cylinder is connected to the hub supporting seat through a pin shaft, and the rod cavity of the inner ring driving oil cylinder is connected to the middle connecting support through a pin shaft.
6. The hydraulic pitch system of claim 3, wherein: it still includes:
an outer ring connecting bracket connected with the outer driving rotating plate,
the other end of the outer ring driving oil cylinder is connected to the outer driving rotating plate through the outer ring connecting support.
7. The hydraulic pitch system of claim 6, wherein: the outer ring driving oil cylinder comprises a rodless cavity and a rod cavity which is inserted into the rodless cavity and can move relative to the rodless cavity, the rodless cavity of the outer ring driving oil cylinder is connected to the middle connecting support through a pin shaft, and the rod cavity of the outer ring driving oil cylinder is connected to the outer ring connecting support through a pin shaft.
8. The hydraulic pitch system of any one of claims 1 to 7, wherein: it includes:
and each driving oil cylinder group comprises an outer ring driving oil cylinder and an inner ring driving oil cylinder.
9. The hydraulic pitch system of claim 8, wherein: the plurality of driving oil cylinder groups comprise two, and the two driving oil cylinder groups are symmetrically distributed relative to the rotation center.
10. A wind generating set is characterized in that: it comprises a blade and a hydraulic pitch system for a wind park according to any of claims 1 to 9, the blade being connected to the inner ring of the outer ring bearing of the hydraulic pitch system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110871309.8A CN113464363B (en) | 2021-07-30 | 2021-07-30 | Hydraulic variable pitch system for wind generating set and wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110871309.8A CN113464363B (en) | 2021-07-30 | 2021-07-30 | Hydraulic variable pitch system for wind generating set and wind generating set |
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| Publication Number | Publication Date |
|---|---|
| CN113464363A CN113464363A (en) | 2021-10-01 |
| CN113464363B true CN113464363B (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110871309.8A Active CN113464363B (en) | 2021-07-30 | 2021-07-30 | Hydraulic variable pitch system for wind generating set and wind generating set |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202015001902U1 (en) * | 2015-03-11 | 2016-06-14 | Liebherr-Components Biberach Gmbh | Adjustment unit for pitch adjustment of a rotor blade and wind turbine with such an adjustment |
| CN206290369U (en) * | 2016-12-22 | 2017-06-30 | 北京金风科创风电设备有限公司 | Wind power generating set and its hydraulic variable propeller system |
| CN207777065U (en) * | 2017-12-18 | 2018-08-28 | 北京金风科创风电设备有限公司 | Hydraulic variable propeller system and wind power generating set |
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