CN220227071U - Impeller cone angle adjusting system, impeller and wind generating set - Google Patents
Impeller cone angle adjusting system, impeller and wind generating set Download PDFInfo
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- CN220227071U CN220227071U CN202321957295.2U CN202321957295U CN220227071U CN 220227071 U CN220227071 U CN 220227071U CN 202321957295 U CN202321957295 U CN 202321957295U CN 220227071 U CN220227071 U CN 220227071U
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- impeller
- cone angle
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- blade
- pitch bearing
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- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000009434 installation Methods 0.000 description 6
- 238000010408 sweeping Methods 0.000 description 5
- 230000008859 change Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The utility model provides an impeller cone angle adjusting system, an impeller and a wind generating set, wherein the impeller cone angle adjusting system is connected between a pitch bearing and a blade, the impeller cone angle adjusting system comprises a fixed seat, an extension joint and a driving device, and the fixed seat is used for being rotatably connected with the pitch bearing on a hub; one end of the extension section is used for connecting the blades of the wind generating set, and the other end of the extension section is rotatably connected with the fixed seat, so that the extension section can rotate around a rotation axis relative to the fixed seat, and the rotation axis and the axis of the pitch bearing form an included angle; the driving device can drive the extension section to rotate around the rotating axis, the impeller taper angle adjusting system is connected between the variable-pitch bearing and the blades, and the blades can be driven to rotate around the rotating axis relative to the variable-pitch bearing so as to adjust the impeller taper angle, and the blade tips of the blades are prevented from striking the tower, so that the use reliability of the wind generating set is improved.
Description
Technical Field
The disclosure belongs to the technical field of wind power generation, and particularly relates to an impeller cone angle adjusting system, an impeller and a wind generating set.
Background
As large megawatt units move to the market, so too does large size towers. As the capacity of the assembly machine increases, the size of the blades increases. The following problem is that the rigidity of the blade is relatively reduced, and in the use process, for example, in the case of sudden change of wind direction, the phenomenon of sweeping the tower caused by too close distance of the blade from the tower can occur, so that a certain potential safety hazard exists.
Disclosure of Invention
The main object of the present disclosure is to provide an impeller cone angle adjustment system, an impeller and a wind generating set.
Aiming at the purposes, the present disclosure provides the following technical scheme:
in one aspect of the disclosure, an impeller cone angle adjustment system is provided, and is suitable for a wind generating set, the impeller cone angle adjustment system is connected between a pitch bearing and a blade, the impeller cone angle adjustment system comprises a fixing seat, an extension joint and a driving device, and the fixing seat is used for being rotatably connected with the pitch bearing on a hub; one end of the extension section is used for connecting the blades of the wind generating set, and the other end of the extension section is rotatably connected with the fixed seat, so that the extension section can rotate around a rotation axis relative to the fixed seat, and the rotation axis and the axis of the pitch bearing form an included angle; the drive means is capable of driving the extension joint to rotate about the axis of rotation.
According to an exemplary embodiment of the disclosure, the fixing base extends along the axis of the pitch bearing, the fixing base is provided with a first installation surface which is obliquely arranged, the rotation axis is perpendicular to the first installation surface, and the other end of the extension joint is rotatably connected to the first installation surface of the fixing base.
Optionally, an angle between the first mounting surface and an axis of the pitch bearing is in a range of 30 ° to 60 °.
Specifically, the impeller cone angle adjustment system further comprises a cone angle variable bearing connected between the fixed seat and the extension joint, and an axis of the cone angle variable bearing is parallel to the rotation axis.
Further, a second mounting surface is arranged at the other end of the extension joint, the second mounting surface is parallel to the first mounting surface, and the driving device is arranged on one of the first mounting surface and the second mounting surface and used for driving the extension joint to rotate around a rotation axis relative to the fixing seat.
In another exemplary embodiment of the present disclosure, the driving device includes a driving motor, a first gear and a second gear, the driving motor is disposed on one of the first mounting surface and the second mounting surface, the first gear is disposed on the other, the first gear and the second gear are in meshed transmission, and the second gear is connected to an output shaft of the driving motor.
In another aspect of the disclosure, an impeller is provided, the impeller includes a blade, a hub, and an impeller taper angle adjustment system as described above, one end of the fixing base is connected to the hub through a variable pitch bearing, one end of the extension section is connected to a blade root flange of the blade, and the other end of the extension section is rotatably connected to the other end of the fixing base.
Optionally, one of the inner ring and the outer ring of the pitch bearing is connected to a hub flange of the hub, and the other is connected to one end of the fixing seat.
Specifically, the extension is provided with an extension flange that is connected to the root flange of the blade.
In another aspect of the disclosure, a wind power generator set is provided, the wind power generator set comprises a tower, a generator and an impeller as described above, wherein the generator is arranged at the top of the tower, and the impeller is connected to a main shaft of the generator.
The impeller cone angle adjusting system, the impeller and the wind generating set provided by the disclosure have the following beneficial effects: the impeller cone angle adjusting system is connected between the variable pitch bearing and the blades, and can drive the blades to rotate around the rotating axis relative to the variable pitch bearing so as to adjust the impeller cone angle, and the blade tips of the blades are prevented from striking the tower, so that the use reliability of the wind turbine generator set is improved.
Drawings
The foregoing and/or other objects and advantages of the disclosure will become more apparent from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 is a block diagram of a hub assembly provided in an exemplary embodiment of the present disclosure.
FIG. 2 is a longitudinal cross-sectional view of the hub assembly of FIG. 1, with a cross-section taken perpendicular to the main axle.
Reference numerals illustrate:
1. a hub; 2. A main shaft;
3. a fixing seat; 4. An extension section;
5. a driving device; 41. an extension joint flange;
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. However, the embodiments of the present disclosure should not be construed as limited to the embodiments set forth herein. The same reference numerals in the drawings denote the same or similar structures, and thus detailed descriptions thereof will be omitted.
The impeller cone angle adjusting system is connected between the variable pitch bearing and the blades, so that the impeller cone angle in the wind turbine is changed, the tower sweeping caused by the fact that the tips of the blades strike the tower in the operation process of the wind turbine is avoided, accidents such as damage to the blades or collapse of the tower are avoided, and the operation reliability of the wind turbine is improved.
Referring to fig. 1 and 2, the impeller taper angle adjustment system provided in this embodiment includes a fixing base 3, an extension section 4, and a driving device 5, where the fixing base 3 is configured to be rotatably connected to a pitch bearing on a hub, so that the fixing base 3 can rotate with the pitch bearing relative to the hub, thereby driving a blade to pitch. One end of the extension section 4 is used for being connected with a blade of a wind generating set, and the other end of the extension section is rotatably connected with the fixed seat 3, so that the extension section 4 can rotate around a rotation axis relative to the fixed seat 3, and the rotation axis is arranged at an included angle with the axis of the pitch bearing. The drive means 5 are able to drive the extension 4 in rotation about the axis of rotation.
The impeller cone angle adjusting system is connected between the variable pitch bearing and the blades, and can drive the blades to rotate around the rotating axis relative to the variable pitch bearing so as to adjust the impeller cone angle, avoid the tips of the blades from striking the tower, and therefore improve the use reliability of the wind generating set.
The blade cone angle in a wind turbine generator refers to the angle of inclination of the blades with respect to a plane perpendicular to the axis of rotation of the fan wheel, which acts to reduce the bending stress of the blades caused by centrifugal forces and to prevent the blade tips from colliding with the tower in the operational state of the fan wheel.
In general, an impeller of a wind generating set may include a hub and 3 blades connected to the hub, where the angle of taper of the impeller is typically 0 to 6 degrees, and an excessively small angle of taper of the impeller is likely to cause the blades to collide with a tower (commonly called a sweeping tower), so as to cause damage to the blades, collapse of the wind generating set, and other accidents. However, the impeller cone angle cannot be increased without limitation, and too much increase can affect the power generation amount of the wind generating set, mainly affect the projection area of wind blowing through the wind generating set, and the projection area is reduced after the impeller cone angle is reduced.
Specifically, with continued reference to fig. 1 and 2, one of the inner and outer rings of the pitch bearing is connected to the hub flange of the hub 1, and the other is connected to one end of the fixing base 3.
As an example, one end of the fixing base 3 facing the hub is provided with a fixing base flange, which can be matched with the pitch bearing, so that the fixing base 3 is arranged on the pitch bearing towards one end of the hub, for example, but not limited to, the fixing base flange is fixed on an inner ring (or an outer ring) of the pitch bearing, and the outer ring (or the inner ring) of the pitch bearing is fixed on the hub, so that the fixing base 3 is connected on the hub through the pitch bearing, and the fixing base 3 can pitch relative to the hub under the action of the pitch bearing, and as the fixing base 3 is connected on the blade through the extension section 4, the blade can be driven to pitch.
One end of extension section 4 towards fixing base 3 rotationally connects in the one end of fixing base 3 that is facing away from the wheel hub, and the one end of extension section 4 facing away from fixing base 3 is provided with extension section flange 41, and this extension section flange 41 can match with the blade root flange, can connect the blade on extension section 4 through this extension section flange 41 for this extension section 4 can rotate around the axis of rotation for fixing base 3, thereby can drive the blade and rotate around the axis of rotation, in order to adjust the impeller cone angle.
With continued reference to the drawings, in an exemplary embodiment of the present disclosure, the fixing base 3 extends along an axis of the pitch bearing, the fixing base 3 is provided with a first installation surface disposed obliquely, a rotation axis is perpendicular to the first installation surface, and the other end of the extension joint 4 is rotatably connected to the first installation surface of the fixing base 3.
In this embodiment, the angle between the first mounting surface and the axis of the pitch bearing is in the range of 30 ° to 60 °. Because the cone angle of the impeller cannot be increased limitlessly, the increase of too much can influence the generated energy of the wind generating set, mainly influence the projection area of wind blowing through the wind generating set, and the projection area is reduced after the cone angle of the impeller is reduced. As an example, the fixing base 3 extends along the axis of the pitch bearing, and the included angle between the first mounting surface and the axis of the pitch bearing is 45 °, but not limited thereto.
As an example, the other end of the extension joint 4 is provided with a second mounting surface, i.e. the end of the extension joint 4 facing the fixing base 3 is provided with a second mounting surface, which is arranged parallel to the first mounting surface, and the driving device 5 is arranged on one of the first mounting surface and the second mounting surface for driving the extension joint 4 to rotate around the rotation axis relative to the fixing base 3, but not limited thereto.
As an example, the impeller cone angle adjustment system further includes a variable cone angle bearing connected between the fixed base 3 and the extension joint 4, specifically, a bearing stator ring of the variable cone angle bearing is connected to the fixed base 3, a bearing moving ring of the variable cone angle bearing is connected to the extension joint 4, for example, but not limited to, a bearing stator ring is connected to the first mounting surface, a bearing moving ring is connected to the second mounting surface, and the extension joint 4 can rotate around the rotation axis relative to the fixed base 3 through the bearing moving ring relative to the bearing stator ring, so that the blade can rotate around the rotation axis relative to the hub to adjust the impeller cone angle, avoiding the blade tip from sweeping the tower, but not limited thereto.
In this embodiment, the driving device 5 is used as a power source for the extension section 4 relative to the fixed seat 3, and under the driving action of the driving device 5, the extension section 4 can rotate around the rotation axis relative to the fixed seat 3, so that the blades connected to the extension section 4 are far away from the tower, and the purpose of avoiding the blade from sweeping the tower is achieved.
Specifically, the driving device 5 includes a driving motor (not shown), a first gear (not shown), and a second gear (not shown), the driving motor is disposed on one of the first mounting surface and the second mounting surface, the first gear is disposed on the other, the first gear is in meshed transmission with the second gear, and the second gear is connected to an output shaft of the driving motor.
The present embodiment is described taking the driving device 5 disposed on the second mounting surface as an example, but not limited thereto.
As an example, the driving device 5 includes a motor and a decelerator connected to an output shaft of the motor, but not limited thereto. Alternatively, the driving device 5 may also be a hydraulic motor and a decelerator, or a hydraulic cylinder. In addition, the driving device 5 also comprises a braking device, wherein the main function of the braking device is to avoid the accidental change of the cone angle when the cone angle does not need to be changed, and the braking device can consist of an electromagnetic brake positioned at the tail of the motor or a mechanical locking bolt.
The present disclosure provides an impeller, which includes a hub 1, a blade connected to the hub 1, and the impeller taper angle adjustment system, wherein one end of a fixing base 3 is connected to the hub 1 through a variable pitch bearing, one end of an extension section 4 is connected to a blade root flange of the blade, and the other end of the extension section 4 is rotatably connected to the other end of the fixing base 3.
Specifically, one of the inner ring and the outer ring of the pitch bearing is connected to a hub flange of the hub 1, and the other is connected to one end of the fixing base 3, for example, but not limited to, a fixing base flange is disposed at one end of the fixing base 3 facing the hub 1, the fixing base flange is fixed to the inner ring of the pitch bearing, and the outer ring of the pitch bearing is disposed on the hub flange of the hub 1, but not limited thereto.
In order to facilitate the connection of the extension section 4 and the blade, one end of the extension section 4, which is away from the fixed seat 3, is provided with an extension section flange 41, the extension section flange 41 can be matched with the blade root flange of the blade, and the blade can be stably connected to the extension section 4 through the extension section flange 41.
The present disclosure also provides a wind generating set, which includes a tower, a generator and an impeller as described above, wherein the generator is disposed at the top of the tower, and the impeller is connected to a main shaft 2 of the generator, so that the impeller rotates to drive the generator to generate electricity.
When the wind speed is small (for example, lower than 8 m/s), the cone angle of the impeller can be adjusted to 0 degree, the work of the wind generating set can be performed in a mode of maximum wind energy absorption, and the generated energy is improved.
When the wind speed is large (10 m/s-12 m/s), the impeller cone angle can be adjusted to between 2 and 3 degrees.
When the wind speed exceeds 12 m/s, the impeller cone angle can be adjusted to between 4 and 5 degrees.
When the wind speed reaches an abnormal wind condition, such as, but not limited to, when data from a sensor of the wind turbine control system (e.g., lidar, or anemometer via fan, wind vane) indicates that after a few seconds, an abnormal wind will reach the wind turbine where it is located, the impeller cone angle can be changed immediately to 7 degrees or 8 degrees to avoid collision of the blade tips with the tower. Typically for a 100 meter long blade, each change in impeller cone angle of 1 degree increases the horizontal distance between the blade tip and the tower by 1.74 meters.
As described above, the impeller cone angle adjusting system provided by the present disclosure may play a role in dynamically adjusting the distance between the blade and the tower (the distance between the blade and the tower may also be referred to as clearance) so as to adapt to various working conditions, thereby improving the adaptability of the wind turbine generator set.
The impeller cone angle adjusting system can work together with the fan control system, and when extreme working conditions occur, the cone angle of the blade is subjected to certain intervention or control, so that the condition that the wind generating set sweeps the tower is avoided.
The impeller cone angle adjusting system comprises a fixed seat 3, an extension joint 4 and a driving device 5 for driving the extension joint 4 to rotate along a rotation axis relative to the fixed seat 3, and can be suitable for a wind generating set, and the impeller cone angle adjusting system is connected between a variable pitch bearing and a blade to change the impeller cone angle in the wind generating set, so that the phenomenon that the blade tip of the blade impacts a tower to sweep the tower in the operation process of the wind generating set is avoided, accidents such as damage to the blade or collapse of the tower are avoided, and the operation reliability of the wind generating set is improved.
The impeller cone angle adjustment system provided by the present disclosure can be disposed on each blade, thus improving the independence of blade adjustment. Further, when the impeller cone angle adjusting system is arranged on the plurality of blades, when the plurality of blades are adjusted to be in horizontal positions (namely all the blades face to the right front), the windward area of the blades can be reduced to the maximum extent, and the condition that the wind generating set collapses due to extreme wind speed such as typhoons and tornadoes is avoided.
In the description of the present disclosure, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present disclosure and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present disclosure.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present disclosure, unless otherwise indicated, the meaning of "a plurality" is two or more.
In the description of the present disclosure, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, and communicatively connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms in this disclosure will be understood by those of ordinary skill in the art in the specific context.
The described features, structures, or characteristics of the disclosure may be combined in any suitable manner in one or more embodiments. In the above description, numerous specific details are provided to give a thorough understanding of embodiments of the present disclosure. One skilled in the relevant art will recognize, however, that the disclosed aspects may be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the disclosure.
Claims (10)
1. An impeller cone angle adjustment system, characterized in that it is applicable to wind generating set, impeller cone angle adjustment system connects between pitch bearing and blade, impeller cone angle adjustment system includes:
the fixed seat (3) is used for being rotatably connected with a variable pitch bearing on the hub;
the extension joint (4), one end of the extension joint (4) is used for connecting the blade of the wind generating set, and the other end of the extension joint is rotatably connected with the fixed seat (3), so that the extension joint (4) can rotate around a rotation axis relative to the fixed seat (3), and the rotation axis and the axis of the pitch bearing form an included angle;
-a driving device (5) capable of driving the extension (4) in rotation about the rotation axis.
2. Impeller cone angle adjustment system according to claim 1, characterized in that the holder (3) extends along the axis of the pitch bearing, the holder (3) being provided with a first mounting surface arranged obliquely, the axis of rotation being perpendicular to the first mounting surface, the other end of the extension (4) being rotatably connected to the first mounting surface of the holder (3).
3. The impeller cone angle adjustment system of claim 2, wherein an angle between the first mounting surface and an axis of the pitch bearing is in a range of 30 ° to 60 °.
4. Impeller cone angle adjustment system according to claim 1, characterized in that it further comprises a cone angle variable bearing connected between the fixed seat (3) and the extension (4) with its axis parallel to the rotation axis.
5. Impeller cone angle adjustment system according to claim 2, characterized in that the other end of the extension joint (4) is provided with a second mounting surface, which is arranged parallel to the first mounting surface, and that the drive means (5) are arranged on one of the first and second mounting surfaces for driving the extension joint (4) in rotation about a rotation axis relative to the stationary seat (3).
6. The impeller cone angle adjustment system according to claim 5, characterized in that the driving means (5) comprises a driving motor, a first gear and a second gear, the driving motor being provided on one of the first mounting surface and the second mounting surface, the first gear being provided on the other, the first gear being in meshed transmission with the second gear, the second gear being connected to an output shaft of the driving motor.
7. An impeller, characterized in that the impeller comprises a blade, a hub (1) and an impeller cone angle adjustment system according to any one of claims 1-6, wherein one end of the fixing base (3) is connected to the hub (1) through a pitch bearing, one end of the extension (4) is connected to a blade root flange of the blade, and the other end of the extension (4) is rotatably connected to the other end of the fixing base (3).
8. An impeller according to claim 7, characterized in that one of the inner and outer rings of the pitch bearing is connected to a hub flange of the hub (1) and the other is connected to one end of the fixed seat (3).
9. An impeller according to claim 7, characterized in that the extension (4) is provided with an extension flange (41), which extension flange (41) is connected to the blade root flange of the blade.
10. A wind power plant, characterized in that it comprises a tower, a generator and an impeller according to any of claims 7-9, wherein the generator is arranged on top of the tower, the impeller being connected to a main shaft (2) of the generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321957295.2U CN220227071U (en) | 2023-07-24 | 2023-07-24 | Impeller cone angle adjusting system, impeller and wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321957295.2U CN220227071U (en) | 2023-07-24 | 2023-07-24 | Impeller cone angle adjusting system, impeller and wind generating set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220227071U true CN220227071U (en) | 2023-12-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321957295.2U Active CN220227071U (en) | 2023-07-24 | 2023-07-24 | Impeller cone angle adjusting system, impeller and wind generating set |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220227071U (en) |
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2023
- 2023-07-24 CN CN202321957295.2U patent/CN220227071U/en active Active
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