CN113969876B - Wind generating set shafting and wind generating set - Google Patents
Wind generating set shafting and wind generating set Download PDFInfo
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- CN113969876B CN113969876B CN202111277281.1A CN202111277281A CN113969876B CN 113969876 B CN113969876 B CN 113969876B CN 202111277281 A CN202111277281 A CN 202111277281A CN 113969876 B CN113969876 B CN 113969876B
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- bearing
- generating set
- contact angle
- wind generating
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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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- 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 provides a wind generating set shafting and a wind generating set, wherein the wind generating set shafting comprises a fixed shaft and a rotating shaft sleeved on the radial outer side of the fixed shaft, the fixed shaft is connected with a fixed part of the wind generating set, the rotating shaft is connected with a hub, the fixed shaft and the rotating shaft are connected through a first bearing and a second bearing which are distributed along the axial direction, the first bearing is close to the center of the hub, the second bearing is far away from the center of the hub, the first bearing and the second bearing are tapered roller bearings, and the contact angle of the second bearing is between 18 and 26 degrees. By adopting the structure, the second bearing mainly bears the axial force of the hub on the fan base, when the second bearing adopts the range, the bearing axial force can be better borne, the load bearing capacity of the wind generating set shafting is improved, compared with other contact angle angles, the second bearing can achieve the same effect under the condition of smaller volume, the material cost of the second bearing is effectively reduced, and the integral cost of the wind generating set shafting is further reduced.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a wind generating set shafting and a wind generating set.
Background
With the great development of wind power generation, the power generation of the wind generating set is gradually increased, the load applied to the wind generating set is also gradually increased, and the bearing structure of the wind generating set needs to bear larger load so as to meet the power generation requirement of the wind generating set.
The wind generating set bearing structure comprises an upwind bearing and a downwind bearing, so that the hub can rotate relative to the fan base to drive the generator to generate electricity. When both the upwind bearing and the downwind bearing adopt tapered roller bearings, the whole bearing structure has larger load bearing capacity. However, the specific arrangement of tapered roller bearings is not optimized in the industry.
Disclosure of Invention
The invention aims to provide a specific optimal setting mode of a tapered roller bearing.
In order to solve the technical problems, the invention provides a wind generating set shafting and a wind generating set, which comprise a fixed shaft and a rotating shaft sleeved on the radial outer side of the fixed shaft, wherein the fixed shaft is fixed on a fan base, the fixed shaft is connected with a fixed part of the wind generating set, the rotating shaft is connected with a hub, the fixed shaft and the rotating shaft are connected through a first bearing and a second bearing which are distributed along the axial direction, the first bearing is close to the hub, the second bearing is far away from the hub, the first bearing and the second bearing are tapered roller bearings, and the contact angle of the first bearing is between 14 and 25 degrees.
By adopting the structure, the second bearing mainly bears the axial force of the hub on the fan base, when the second bearing adopts the range, the bearing axial force can be better borne, the load bearing capacity of the wind generating set shafting is improved, compared with other contact angle angles, the second bearing can achieve the same effect under the condition of smaller volume, the material cost of the second bearing is effectively reduced, and the integral cost of the wind generating set shafting is further reduced.
Alternatively, the contact angle of the first bearing 5 is between 22 and 25 degrees and the contact angle of the second bearing 6 is between 21 and 24 degrees.
Alternatively, the contact angle of the first bearing 5 is between 14 and 17 degrees and the contact angle of the second bearing 6 is between 24 and 26 degrees.
Alternatively, the contact angle of the first bearing 5 is between 18 and 21 degrees and the contact angle of the second bearing 6 is between 18 and 21 degrees.
Optionally, the contact angle of the first bearing 5 is between 14 and 25 degrees.
Optionally, the contact angle of the first bearing 5 is between 14 and 18 degrees.
Optionally, the contact angle of the first bearing 5 is between 15 and 17 degrees.
Optionally, the contact angle of the first bearing 5 is between 19 and 21 degrees.
Optionally, the contact angle of the first bearing 5 is between 23 and 25 degrees.
The wind generating set comprises a hub and a fan base, and further comprises a wind generating set shafting arranged between the hub and the fan base, wherein the wind generating set shafting is the wind generating set shafting.
Drawings
FIG. 1 is a cross-sectional view of a shafting of a wind turbine generator system provided by the present invention;
fig. 2 is an enlarged schematic view of the first and second bearing positions of fig. 1.
The reference numerals in fig. 1-2 are illustrated as follows:
1 dead axle, 2 pivot, 3 fan base, 4 wheel hubs, 5 first bearings, 6 second bearings, 7 rotation axle center, 8 fixed knot construct.
Detailed Description
In order to make the technical solution of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments.
The embodiment of the invention provides a shafting of a wind generating set, please refer to fig. 1 and 2, which comprises a fixed shaft 1 and a rotating shaft 2 sleeved on the radial outer side of the fixed shaft 1, wherein the fixed shaft 1 is connected with a fixed part of the wind generating set, the rotating shaft 2 is connected with a hub 4, the fixed shaft 1 and the rotating shaft 2 are connected through a first bearing 5 and a second bearing 6 which are distributed along the axial direction, the first bearing 5 is close to the center of the hub 4, the second bearing 6 is far away from the center of the hub 4, and the first bearing 5 and the second bearing 6 are tapered roller bearings. The fixing component of the wind generating set may be a main frame or a fan base 3, and the fan base 3 is taken as an example for illustration, but the fixing component in the present invention is not limited to the fan base 3.
As shown in fig. 1 and 2, α is the contact angle of the first bearing 5, and β is the contact angle of the second bearing 6 in fig. 1 and 2. The second bearing 6 is arranged on the radial outer side of the fixed shaft 1, and is close to one end of the fan base 3, the radial inner side of one end of the rotating shaft 2 close to the fan base 3 is sleeved on the second bearing 6, the fixed shaft 1 and the rotating shaft 2 can rotate relatively through the second bearing 6, and the generator rotor connected with the rotating shaft 2 is driven to rotate relatively to the generator stator connected with the fixed shaft 1, so that power generation is performed.
The inventor has conducted stress study on the shafting of the wind generating set, as shown in fig. 1, since the second bearing 6 is in a downwind direction, the bearing hub 4 bears most of the axial force on the fan base 3, and the sources of the axial force include, for example, the thrust of wind on the blades and the hub 4.
It can be seen that, since the second bearing 6 mainly bears the axial force of the hub 4 on the fan base 3, a better axial bearing capacity is required, so that the larger the contact angle of the second bearing 6, the stronger the axial force bearing capacity is, so as to obtain a better load bearing capacity, and the overall load bearing capacity of the wind generating set shafting is enhanced. The second bearing 6 of the present embodiment is a tapered roller bearing and has a contact angle between 18 and 26 degrees, preferably between 22 and 26 degrees.
In addition, a first bearing 5 is disposed between the rotating shaft 2 and the fixed shaft 1, and since the first bearing 5 is located in the upwind direction, most of the radial force of the hub 4 on the fan base 3 is carried, and sources of the radial force include, for example, the hub 4, the gravity of the blades, and the like.
Therefore, the first bearing 5 mainly bears radial force, and better radial bearing capacity is required, so that the first bearing 5 has stronger bearing capacity when the contact angle is smaller, and the overall load bearing capacity of the wind generating set shafting is enhanced. The first bearing 5 of the present embodiment is a tapered roller bearing and has a contact angle between 14 and 25 degrees, preferably between 14 and 18 degrees.
Further studies have been made on the combination of the first bearing 5 and the second bearing 6 in combination with the force analysis described above, taking into account the service life of both when verifying the load carrying capacity.
The combination of different contact angles of the first bearing 5 and the second bearing 6 is subjected to comparative analysis through the center load of the hub 4, if the contact angle of the second bearing 6 is set to be 18 degrees, the smaller the contact angle of the first bearing 5 is, the longer the service life of the bearing is, but the inflection point appears when the contact angle of the second bearing 6 reaches 16 degrees; if the contact angle of the first bearing 5 is fixed at 18 degrees, the smaller the contact angle of the second bearing 6 is, the longer the service life thereof is, but the service life of the first bearing 5 may exhibit an inflection point when the contact angle of the second bearing 6 reaches 23 degrees. It can be seen that when the contact angle of one bearing is determined, an inflection point appears when the contact angle of the other bearing increases to some extent.
The second bearing 6 mainly bears axial force, the contact angle can be relatively larger, but the smaller the contact angle is, the higher the fault tolerance of the compression amount of the wind generating set shafting to the end cover of the fan base 3 is, namely the smaller the contact angle is, the easier the assembly with the fan base 3 is realized, in addition, the smaller the bearing contact angle is, the smaller the weight is, the lower the cost is, and in consideration of service life, the contact angle of the second bearing 6 can be smaller, preferably, the contact angle of the second bearing 6 is between 21 and 24 degrees, the contact angle of the first bearing 5 is between 22 and 25 degrees, the service life of the wind generating set shafting is longer, and the cost of the shafting is lower.
In view of the service life of the second bearing 6, the contact angle of the first bearing 5 may also be set to be smaller, for example, the combination is selected such that the contact angle of the second bearing 6 is between 24 and 26 degrees at the contact angle of the first bearing 5 between 14 and 17 degrees.
In addition, the influence of the static safety coefficient and the internal stability of the wind generating set shafting can be considered.
By comparing the combinations of the contact angles of the first bearing 5 and the second bearing 6 with respect to the center limit load of the hub 4, when the contact angle of the second bearing 6 is selected to be between 18 and 20 degrees, the contact angle of the first bearing 5 becomes inflection point when it is about 14 to 16 degrees. In addition, in order to ensure the internal stability of the wind generating set shafting, the loads borne by the first bearing 5 and the second bearing 6 should be distributed uniformly as much as possible, and the analysis of the internal stability of the wind generating set shafting by combining different contact angles of the first bearing 5 and the second bearing 6 can be obtained, the difference value of the contact angles of the first bearing 5 and the second bearing 6 is not suitable to be too large, and the contact angle of the first bearing 5 is also not suitable to be too large, so that the load distribution of the first bearing 5 and the second bearing is relatively uniform, and the internal stability of the wind generating set shafting is improved. Therefore, the contact angle of the second bearing 6 is selected to be between 18 and 21 degrees, the contact angle of the first bearing 5 is selected to be between 18 and 21 degrees, and the static safety coefficient and the internal stability of the shafting of the wind turbine generator are both higher, so that the wind turbine generator system is a second preferred scheme compared with the previous combination.
In addition, the influence of temperature sensitivity is also considered.
By the combination of contact angles of the first bearing 5 and the second bearing 6, the comparison analysis of temperature sensitivity can obtain that on the premise that the center span, the inner diameter and the outer diameter of the first bearing 5 and the second bearing 6 are all determined, the smaller the contact angle of the first bearing 5 and the second bearing 6 is, the larger the pre-tightening force of the first bearing 5 and the second bearing 6 is, the lower the temperature sensitivity of the whole wind generating set shafting is, and therefore, the combination that the contact angle of the second bearing 6 is between 18 and 20 degrees and the contact angle of the first bearing 5 is between 14 and 16 degrees also has better temperature sensitivity.
On this basis, the preferred contact angle of the first bearing 5 is different depending on the depth to which the first bearing 5 protrudes into the hub 4 in practical use and the distance between the first bearing 5 and the second bearing 6. The closer the first bearing 5 is to the hub 4, the smaller the preferable contact angle is, and the contact angle of the first bearing 5 is preferably 15 to 17 degrees;
the closer the distance between the first bearing 5 and the second bearing 6, the greater the preferred contact angle of the first bearing 5, in which case the contact angle of the first bearing 5 is preferably between 19 and 21 degrees, in a second preferred manner;
and when the first bearing 5 is farther from the hub 4 and closer to the second bearing 6, the contact angle of the first bearing 5 is preferably between 23 and 25 degrees, which is a third preferred arrangement.
The embodiment further comprises a fixing structure 8, wherein the fixing structure 8 can be matched with the rotating shaft 2 to limit the first bearing 5 in the axial direction.
With continued reference to fig. 1, the fixing structure 8 is disposed at one end of the fixed shaft 1 away from the fan base 3, and cooperates with the rotating shaft 2 to limit the first bearing 5 between the fixed shaft 1 and the rotating shaft 2, so that the first bearing cannot be separated from between the fixed shaft 1 and the rotating shaft 2.
The invention also provides a wind generating set, which comprises a hub 4 and a wind turbine base 3, and further comprises a wind generating set shafting arranged between the hub 4 and the wind turbine base 3, wherein the wind generating set shafting is the wind generating set shafting.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (2)
1. The utility model provides a wind generating set shafting which characterized in that: the wind turbine generator system comprises a fixed shaft (1) and a rotating shaft (2) sleeved on the radial outer side of the fixed shaft (1), wherein the fixed shaft (1) is connected with a fixed part of the wind turbine generator system, the rotating shaft (2) is connected with a hub (4), the fixed shaft (1) is connected with the rotating shaft (2) through a first bearing (5) and a second bearing (6) which are distributed along the axial direction, the first bearing (5) is close to the center of the hub (4), the second bearing (6) is far away from the center of the hub (4), and the first bearing (5) and the second bearing (6) are tapered roller bearings;
the contact angle of the first bearing (5) is between 22 and 25 degrees and the contact angle of the second bearing (6) is between 21 and 24 degrees;
or, the contact angle of the first bearing (5) is between 14 and 17 degrees and the contact angle of the second bearing (6) is between 24 and 26 degrees;
or, the contact angle of the first bearing (5) is between 18 and 21 degrees, and the contact angle of the second bearing (6) is between 18 and 21 degrees;
or, the contact angle of the second bearing (6) is between 18 and 20 degrees, the contact angle of the first bearing (5) is between 14 and 16 degrees, or between 15 and 17 degrees, or between 19 and 21 degrees, or between 23 and 25 degrees.
2. A wind power generator set comprising a hub (4) and a wind turbine base (3), characterized in that it further comprises a wind power generator set shafting arranged between the hub (4) and the wind turbine base (3), the wind power generator set shafting being the wind power generator set shafting according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111277281.1A CN113969876B (en) | 2021-10-29 | 2021-10-29 | Wind generating set shafting and wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111277281.1A CN113969876B (en) | 2021-10-29 | 2021-10-29 | Wind generating set shafting and wind generating set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113969876A CN113969876A (en) | 2022-01-25 |
| CN113969876B true CN113969876B (en) | 2023-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111277281.1A Active CN113969876B (en) | 2021-10-29 | 2021-10-29 | Wind generating set shafting and wind generating set |
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| Country | Link |
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| CN (1) | CN113969876B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008064244A (en) * | 2006-09-08 | 2008-03-21 | Ntn Corp | Spindle supporting structure for wind power generator |
| CN201475161U (en) * | 2009-09-01 | 2010-05-19 | 常州光洋轴承有限公司 | Special bearing for main shaft of direct-drive wind power generating set |
| WO2016146115A1 (en) * | 2015-03-19 | 2016-09-22 | Schaeffler Technologies AG & Co. KG | Roller bearing, for example of a wind power plant |
| WO2021060389A1 (en) * | 2019-09-26 | 2021-04-01 | Ntn株式会社 | Double row tapered roller bearing |
| CN113446173A (en) * | 2021-07-15 | 2021-09-28 | 上海电气风电集团股份有限公司 | Wind generating set and transmission shaft system thereof |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2361040T3 (en) * | 2006-12-08 | 2011-06-13 | Stx Heavy Industries Co., Ltd. | BUSHING FOR THE ROTOR OF A WIND TURBINE. |
| ES2761952T3 (en) * | 2012-08-21 | 2020-05-21 | Skf Ab | Wind turbine rotor shaft arrangement |
| BR102014026410A2 (en) * | 2013-11-07 | 2016-10-04 | Skf Ab | bearing arrangement for fluid machinery application |
| WO2018153419A1 (en) * | 2017-02-21 | 2018-08-30 | Vestas Wind Systems A/S | Wind turbine main rotor arrangement having improved bearing abutment configuration |
| CN207349031U (en) * | 2017-10-26 | 2018-05-11 | 新疆金风科技股份有限公司 | The shafting and wind power generating set of wind power generating set |
| CN113294443A (en) * | 2021-06-25 | 2021-08-24 | 东方电气集团东方电机有限公司 | Bearing device and wind power generation equipment |
-
2021
- 2021-10-29 CN CN202111277281.1A patent/CN113969876B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008064244A (en) * | 2006-09-08 | 2008-03-21 | Ntn Corp | Spindle supporting structure for wind power generator |
| CN201475161U (en) * | 2009-09-01 | 2010-05-19 | 常州光洋轴承有限公司 | Special bearing for main shaft of direct-drive wind power generating set |
| WO2016146115A1 (en) * | 2015-03-19 | 2016-09-22 | Schaeffler Technologies AG & Co. KG | Roller bearing, for example of a wind power plant |
| WO2021060389A1 (en) * | 2019-09-26 | 2021-04-01 | Ntn株式会社 | Double row tapered roller bearing |
| CN113446173A (en) * | 2021-07-15 | 2021-09-28 | 上海电气风电集团股份有限公司 | Wind generating set and transmission shaft system thereof |
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| Publication number | Publication date |
|---|---|
| CN113969876A (en) | 2022-01-25 |
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Address after: 830026 No. 107, Shanghai Road, Urumqi economic and Technological Development Zone, the Xinjiang Uygur Autonomous Region Patentee after: Jinfeng Technology Co.,Ltd. Address before: 830026 No. 107, Shanghai Road, Urumqi economic and Technological Development Zone, the Xinjiang Uygur Autonomous Region Patentee before: XINJIANG GOLDWIND SCIENCE & TECHNOLOGY Co.,Ltd. |
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