CN210343620U - Shafting structure of direct-drive wind driven generator - Google Patents
Shafting structure of direct-drive wind driven generator Download PDFInfo
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- CN210343620U CN210343620U CN201921443220.6U CN201921443220U CN210343620U CN 210343620 U CN210343620 U CN 210343620U CN 201921443220 U CN201921443220 U CN 201921443220U CN 210343620 U CN210343620 U CN 210343620U
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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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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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Abstract
The utility model discloses a direct-drive wind driven generator shafting structure, including closing the dead axle on the main frame and closing the pivot on the wheel hub, the dead axle outside is equipped with upwind bearing and the downwind bearing that supports the pivot rotation, the cross section of pivot lateral wall is "people" style of calligraphy structure, upwind bearing and downwind bearing are located two tip of "people" style of calligraphy structure respectively, the third end of "people" style of calligraphy structure is fitted on the wheel hub, outwards extends along the third end and forms the disc structure that is located the pivot outer lane; the cross section of the side wall of the fixed shaft is of an L-shaped structure, the upwind bearing is positioned at one end of the fixed shaft, and the other end of the fixed shaft is combined on the main frame. The structure can improve the overall performance of the generator and the generator set, reduces the production and manufacturing cost, and has the characteristics of good economic performance and high reliability.
Description
Technical Field
The utility model belongs to the aerogenerator field, specific saying so, directly drive aerogenerator shafting structure.
Background
At present, because energy utilization and environmental problems become important problems facing global sustainable development, on the basis, wind energy is taken as a renewable pollution-free green energy, and large-scale development and utilization of the wind energy can not only effectively reduce the use of petrochemical resources, but also protect the environment and reduce the emission of greenhouse gases, so that the vigorous development of the wind energy is a necessary choice for the current society to realize the global economic sustainable development today. In the field of wind driven generators, direct-driven wind driven generators develop rapidly, the market demands for large MW-level direct-driven wind driven generators more and more, and various generator manufacturers strive to put forward 6MW, 8MW and even 10 MW-level direct-driven wind driven generators forever. However, with the increase of power, the blades are lengthened, the load is also greatly increased, and the original traditional single bearing shafting structure cannot meet the structural design requirements, so that a double bearing shafting structure is used on a large-scale wind driven generator. Along with the promotion of load, need adopt bigger bearing design structure, the cost of big bearing is high, and the technique is relatively immature, and the reliability is low. In addition, the double bearing structure has a long axial dimension and large shaft deformation, greatly affects the air gap of the generator, and also affects the improvement of the power factor of the generator. Therefore, it is particularly important to design a shafting structure with good economical efficiency and high reliability.
In the related art, a structure of a wind turbine generator system is improved, for example, a wind turbine generator system including a hub, a rotating shaft, and a stator shaft, as disclosed in patent document CN109931224A (an outer rotor type direct drive wind turbine generator system, 2019.06.25), in which the rotating shaft is provided with a nacelle side bearing and a wind wheel side bearing, and the hub is connected by a rotating shaft flange, so that the rotating shaft flange is disposed closer to a nacelle to shorten a distance from the hub to a nacelle frame. The gravity center position of the wind wheel is kept unchanged relative to the hub, so that the distance from the gravity center of the wind wheel to the main bearing and the engine room frame is shortened, the gravity moment of the wind wheel relative to the main bearing and the engine room frame is reduced under the condition that the gravity center of the wind wheel and the mass of the wind wheel are kept unchanged, the stress condition of the main bearing and the engine room frame is improved, the service life of the main bearing of the outer rotor type direct-drive wind generating set is prolonged, and the operation cost of the outer rotor type direct-drive wind generating set is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a directly drive aerogenerator shafting structure adopts the pivot and the dead axle constitution that the outer wall is "people" style of calligraphy and L type respectively, and upwind bearing and downwind bearing are located two tip and the dead axle cooperation of "people" style of calligraphy, and its third end design has the disc structure, and this structure can improve the wholeness ability of generator and generating set, reduces production manufacturing cost, has the characteristics that economic performance is good, the reliability is high.
The utility model discloses a following technical scheme realizes: a shafting structure of a direct-drive wind driven generator comprises a fixed shaft combined on a main frame and a rotating shaft combined on a hub, wherein an upwind bearing and a downwind bearing for supporting the rotating shaft to rotate are arranged on the outer side of the fixed shaft; the cross section of the side wall of the fixed shaft is of an L-shaped structure, the upwind bearing is positioned at one end of the fixed shaft, and the other end of the fixed shaft is combined on the main frame.
The size of the upwind bearing is equal to that of the downwind bearing.
The inner wall of the fixed shaft is of an outward protruding structure from the downwind bearing to the closing position of the main frame.
The inclination angle of the outward protruding structure is not less than 2 degrees and not more than β degrees and not more than 8 degrees.
The fixed shaft between the upwind bearing and the downwind bearing is of an equal-wall-thickness structure, and the distance between the upwind bearing and the downwind bearingDiameter d from s and upwind bearing1Or diameter d of the downwind bearing2Satisfies the following conditions: s is more than or equal to 1.5d1Or s is more than or equal to 1.5d2(ii) a The rotating shaft between the downwind bearing position and the third end part is of an equal-wall-thickness structure.
The wall thickness h of the fixed shaft between the upwind bearing and the downwind bearing1All satisfy: h is not less than 30mm1Less than or equal to 60 mm; the wall thickness h of the rotating shaft from the downwind bearing position to the third end2Satisfies the following conditions: h is not less than 30mm2≤60mm。
The distance s between the upwind bearing and the downwind bearing and the distance u between the two joint surfaces meet the following requirements: s is more than or equal to 2 u.
The upwind bearing is located inside the hub.
And one side of the disc structure, which is close to the hub, is provided with an inclined conical reinforcing rib.
And a bearing pressing ring for limiting the upwind bearing and the downwind bearing is arranged on the fixed shaft.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
(1) the utility model discloses in, adopt the dead axle from with the main frame close the face begin, in proper order downwind direction bearing and upwind direction bearing position extend and be L type structure, this L type is structural, from downwind direction bearing position to close the position with the main frame and set up to evagination structure for the circular arc radius increase of the corner position of L type structure, the stress level is low.
(2) In the utility model, the dead axle between the downwind bearing position and the upwind bearing position is set to be an equal wall thickness structure, the structure has uniform stress distribution and consistent rigidity and deformation, and the service life of the bearing can be effectively prolonged;
(3) in the utility model, the rotating shaft adopts a herringbone structure, and the upwind bearing and the downwind bearing are positioned at two ends of the herringbone structure and are matched and arranged outside the dead axle, which is beneficial to increasing the bearing capacity of the dead axle; the rotating shaft between the downwind bearing position and the third end part is designed into a structure with equal wall thickness.
(4) The utility model discloses there is the disc structure in pivot outer lane design, and the disc structure can be a body structure with the pivot, during the use, can be at the structural oblique toper strengthening rib of design of disc to increase substantially the bulk rigidity of rotor part, can effectively reduce the air gap deflection.
(5) The utility model discloses an upwind bearing and downwind bearing size of a dimension equal, the model is unanimous, all adopts the little bearing design, and the little bearing application is ripe, and is with low costs, has not only improved the ability to resist risk of bearing, still greatly reduced the cost, improved security and economic nature.
(6) The utility model relates to a shafting structure adopts bearing inner race rotation mode, arranges the windward bearing in wheel hub inside, the reasonable wheel hub inner space that has utilized for the complete machine structure is more compact, very big shortening the installation distance of wheel hub center to the main frame, reduced the effort that blade load produced on the bearing of yawing.
(7) The utility model relates to an among the axial structure, two close the distance of face (pivot and wheel hub promptly close the face to the dead axle and the main frame the distance of closing the face) as little as possible to satisfy distance s between upwind bearing and the downwind bearing and be greater than or equal to two distance u that close the face of twice, in order to shorten wheel hub to the installation distance of main frame, can reduce the load of driftage bearing, and make the structure of whole unit compacter, the cost is lower, and the economic nature is better.
To sum up, the utility model relates to a shafting structure adopts big span project organization, and the bearing atress is little, decides pivot rigidity, warp unanimously, can improve the life of bearing by a wide margin, and structural design is reasonable, can not only reduce the air gap of generator, improves generator power factor, can also be more reasonable optimize installation space, when making the complete machine structure more compact, has still reduced the effect that blade load produced on the bearing of yawing, has practical value.
Drawings
Fig. 1 is the semi-section schematic diagram of the shafting structure of the utility model.
The device comprises a main frame, a fixed shaft, a hub, a rotating shaft, an upwind bearing, a downwind bearing, a disc structure, an 8-outward protruding structure, an inclined conical reinforcing rib and a bearing pressing ring, wherein the main frame is 1, the fixed shaft is 2, the hub is 3, the rotating shaft is 4, the upwind bearing is 5, the downwind bearing is 6, the disc structure is 7, the inclined conical reinforcing rib is 9, and the bearing pressing.
Detailed Description
The present invention will be described in further detail with reference to examples, but the present invention is not limited thereto.
Example (b):
the embodiment relates to a shafting structure of a direct-drive wind driven generator.
As shown in the structure of fig. 1, the shafting structure mainly comprises a fixed shaft 2, a rotating shaft 4, an upwind bearing 5, a downwind bearing 6 and other structures, wherein the fixed shaft 2 is fitted on the main frame 1, the rotating shaft 4 is fitted on the hub 3, the upwind bearing 5 and the downwind bearing 6 are arranged outside the fixed shaft 2 and are used for supporting the rotating shaft 4 to rotate, in the embodiment, the upwind bearing 5 and the downwind bearing 6 have the same size and the same type, and are designed by adopting small bearings, and when the shafting structure is actually used, the upwind bearing 5 and the downwind bearing 6 can be limited by using a bearing pressing ring 10. As shown in the structure of figure 1, the cross section of the side wall of the rotating shaft 4 is of a herringbone structure, the upwind bearing 5 and the downwind bearing 6 are respectively positioned at two end parts of the herringbone structure, and the third end part of the herringbone structure is combined on the hub 3. In addition, a disc structure 7 extending outwards along the third end part of the herringbone structure is further arranged on the third end part of the herringbone structure, so that the disc structure 7 surrounds the outer ring of the rotating shaft 4, and the disc structure 7 and the rotating shaft 4 can be designed into an integrated structure.
In a possible embodiment, the disc structure 7 is designed to be thin-walled, for example with a disc wall thickness in the interval 40 mm ≦ b ≦ 150mm, while on the disc structure 7 on the side close to the hub 3, tapered ribs 9 may be provided to substantially increase the overall stiffness of the rotor part and reduce the amount of air gap deformation.
As shown in the structure of figure 1, the cross section of the side wall of the fixed shaft 2 is in an L-shaped structure, the upwind bearing 5 is positioned at one end of the fixed shaft 2, and the axial movement of the upwind bearing 5 is limited by the bearing clamping ring 10The other end of the fixed shaft 2 extends out of the hub 3 and fits on the main frame 1, the fixed shaft 2 between the upwind bearing 5 and the downwind bearing 6 is of an equal wall thickness structure, and the cross section of the side wall of the fixed shaft 2 is of an L-shaped structure, which is equivalent to the situation that the upwind bearing 5 and the downwind bearing 6 are both arranged on the same straight edge of the L-shaped structure. In a possible embodiment, the wall thickness of the fixed shaft 2 between the two bearings is 30mm ≦ h1In the interval of less than or equal to 60mm, the two bearings adopt a large-span design structure, namely the distance between the upwind bearing 5 and the downwind bearing 6 is more than or equal to 1.5 times of the diameter of the two bearings, and meanwhile, the rotating shaft 4 from the position of the downwind bearing 6 to the third end part is of an equal-wall-thickness structure, and the wall thickness of the rotating shaft is less than or equal to h at 30mm2The interval is less than or equal to 60 mm.
In another possible embodiment, the inward wall of the fixed shaft 2 from the downwind bearing 6 to the main frame 1 can be arranged as an outward protruding structure 8, that is, the radius of the arc at the L-shaped corner is increased as shown in FIG. 1, and in practical use, the inclination angle of the outward protruding structure 8 is in the interval of 2 degrees and β degrees and 8 degrees, and the stress level is lower.
On the basis of the structure, the distance from the joint surface of the rotating shaft 4 and the hub 3 to the joint surface of the fixed shaft 2 and the main frame 1 can be reduced as much as possible, and the installation distance from the hub 3 to the main frame 1 can be shortened. Therefore, in a possible embodiment, 1/2, which makes the distance between the two joint surfaces less than or equal to the distance between the upwind bearing 5 and the downwind bearing 6, can reduce the load of the yaw bearing, and make the whole unit more compact, lower in cost and more economical.
The above is only the preferred embodiment of the present invention, not to the limitation of the present invention in any form, all the technical matters of the present invention all fall into the protection scope of the present invention to any simple modification and equivalent change of the above embodiments.
Claims (10)
1. Directly drive aerogenerator shafting structure, its characterized in that: the device comprises a fixed shaft (2) combined on a main frame (1) and a rotating shaft (4) combined on a hub (3), wherein an upwind bearing (5) and a downwind bearing (6) for supporting the rotating shaft (4) to rotate are arranged on the outer side of the fixed shaft (2), the cross section of the side wall of the rotating shaft (4) is of a herringbone structure, the upwind bearing (5) and the downwind bearing (6) are respectively positioned at two ends of the herringbone structure, the third end of the herringbone structure is combined on the hub (3), and a disc structure (7) positioned on the outer ring of the rotating shaft (4) is formed by extending outwards along the third end; the cross section of the side wall of the fixed shaft (2) is of an L-shaped structure, the upwind bearing (5) is positioned at one end of the fixed shaft (2), and the other end of the fixed shaft (2) is jointed on the main frame (1).
2. The direct-drive wind power generator shafting structure of claim 1, wherein: the size of the upwind bearing (5) is equal to that of the downwind bearing (6).
3. The direct-drive wind power generator shafting structure of claim 1, wherein: the inner wall of the fixed shaft (2) is of an outward protruding structure (8) from the downwind bearing (6) to the closing position of the main frame (1).
4. The shafting structure of the direct-drive wind driven generator as claimed in claim 3, wherein the inclination angle of the outward protruding structure (8) is not less than 2 degrees and not more than β degrees and not more than 8 degrees.
5. The direct-drive wind power generator shafting structure of claim 1, wherein: the fixed shaft (2) between the upwind bearing (5) and the downwind bearing (6) is of an equal-wall-thickness structure, and the distance s between the upwind bearing (5) and the downwind bearing (6) and the diameter d of the upwind bearing (5)1Or the diameter d of the downwind bearing (6)2Satisfies the following conditions: s is more than or equal to 1.5d1Or s is more than or equal to 1.5d2(ii) a The rotating shaft (4) between the downwind bearing (6) and the third end part is of an equal-wall-thickness structure.
6. The direct-drive wind power generator shafting structure according to claim 5, wherein: a fixed shaft (2) positioned between the upwind bearing (5) and the downwind bearing (6)Wall thickness h of1All satisfy: h is not less than 30mm1Less than or equal to 60 mm; the wall thickness h of the rotating shaft (4) from the position of the downwind bearing (6) to the third end2Satisfies the following conditions: h is not less than 30mm2≤60mm。
7. The direct-drive wind power generator shafting structure of claim 1, wherein: the distance s between the upwind bearing (5) and the downwind bearing (6) and the distance u between the two joint surfaces meet the following requirements: s is more than or equal to 2 u.
8. The direct-drive wind power generator shafting structure of claim 1, wherein: the upwind bearing (5) is positioned inside the hub (3).
9. The direct-drive wind power generator shafting structure of claim 1, wherein: and an inclined conical reinforcing rib (9) is arranged on one side of the disc structure (7) close to the hub (3).
10. The direct-drive wind power generator shafting structure of claim 1, wherein: and a bearing pressing ring (10) for limiting the upwind bearing (5) and the downwind bearing (6) is arranged on the fixed shaft (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921443220.6U CN210343620U (en) | 2019-09-02 | 2019-09-02 | Shafting structure of direct-drive wind driven generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921443220.6U CN210343620U (en) | 2019-09-02 | 2019-09-02 | Shafting structure of direct-drive wind driven generator |
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| Publication Number | Publication Date |
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| CN210343620U true CN210343620U (en) | 2020-04-17 |
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| CN201921443220.6U Active CN210343620U (en) | 2019-09-02 | 2019-09-02 | Shafting structure of direct-drive wind driven generator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412735A (en) * | 2022-01-24 | 2022-04-29 | 新疆金风科技股份有限公司 | Shafting structure for wind generating set and wind generating set |
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2019
- 2019-09-02 CN CN201921443220.6U patent/CN210343620U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412735A (en) * | 2022-01-24 | 2022-04-29 | 新疆金风科技股份有限公司 | Shafting structure for wind generating set and wind generating set |
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