CN110848267A - Yaw bearing of S-shaped positioning rotary diameter structure - Google Patents
Yaw bearing of S-shaped positioning rotary diameter structure Download PDFInfo
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- CN110848267A CN110848267A CN201911379285.3A CN201911379285A CN110848267A CN 110848267 A CN110848267 A CN 110848267A CN 201911379285 A CN201911379285 A CN 201911379285A CN 110848267 A CN110848267 A CN 110848267A
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- shaped positioning
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- rolling bodies
- angle
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- 238000005096 rolling process Methods 0.000 claims abstract description 57
- 238000013461 design Methods 0.000 claims abstract description 11
- 125000006850 spacer group Chemical group 0.000 claims abstract description 5
- 238000007789 sealing Methods 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 5
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 238000004458 analytical method Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 239000004519 grease Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
- F16C33/585—Details of specific parts of races of raceways, e.g. ribs to guide the rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
- F16C19/18—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with two or more rows of balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2223/00—Surface treatments; Hardening; Coating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2223/00—Surface treatments; Hardening; Coating
- F16C2223/02—Mechanical treatment, e.g. finishing
Abstract
The invention relates to a yaw bearing of an ultra-large and ultra-precise end, in particular to a yaw bearing of an S-shaped positioning rotary diameter structure, which comprises: the rolling bodies are arranged between the outer ring inner raceway and the inner ring outer raceway in a double-row mode; a spacer block is arranged between each row of rolling bodies; the section between the two double rows of rolling bodies forms an S-shaped positioning rotary structure, and the connecting line of the axial central points of the two rolling bodies is in a staggered parallel design; the S-shaped positioning rotary diameter structure of the rolling body achieves the variable pre-tightening effect on the basis of the original negative clearance between the rolling body and the raceway under the actual loading condition. The Hertz contact stress generated between the steel ball and the ferrule is greatly reduced, and the load borne by a single rolling body is reduced.
Description
Technical Field
The invention relates to a yaw bearing of an ultra-large and ultra-precise end, in particular to a yaw bearing of an S-shaped positioning rotation diameter structure, which is mainly applied to variable pre-tightening matching of ultra-flexible towers and extremely-high engine rooms on ultra-large megawatt land, coastal, floating and offshore wind generating sets.
Background
The yaw turntable bearing in the wind generating set is used as the most important special bearing in a cabin of the wind generating set, the excellent use and running performance of the yaw turntable bearing is related to the normal operation, the generating efficiency and the like of the wind generating set, and the bearing capacity and the service life of the yaw turntable bearing are related to the normal operation, the generating efficiency and the like of the wind generating set. Due to the fact that the matched bearing is large in size, complex in structure and stress and high in design and production difficulty, the yaw bearing produced in China generally is difficult to match in an ultra-flexible tower barrel and a wind driven generator cabin with an extremely high cabin in performance and service life. Therefore, the yaw bearing suitable for the wind driven generator has the design difficulty that the loaded condition is more complicated and worse than that of the common wind driven generator set, and a more advanced design concept is required to overcome.
The method is based on the German classification society wind generating set certification standard (GL) and European standard (ISO), and combines the ultra-modern design theory and analysis method to perform relevant type tests and FEA theoretical calculation on the yaw bearing matched with the wind generating set of the ultra-flexible tower barrel and the ultra-high engine room, thereby providing theoretical significance and engineering use value for the design and production of ultra-large and ultra-precise yaw bearings.
At present, most of wind driven generator bearings depend on foreign import, and foreign bearings are high in price and long in supply period, so that the development of complete wind driven generator enterprises in China is restricted.
The design difficulty of the internal structure of the ultra-large and ultra-precise yaw bearing in the domestic development is a difficult problem which needs to be overcome in the future development trend.
Disclosure of Invention
In order to overcome the problems of complex working condition, large size, severe actual environment, horizontal installation and the like of a wind generating set of an ultra-flexible tower barrel and an extremely high engine room, the invention provides an S-shaped positioning rotation diameter variable pre-tightening matching and yaw bearing of the ultra-flexible tower barrel and the extremely high engine room.
In order to achieve the purpose, the invention adopts the technical scheme that: yaw bearing of S-shaped positioning rotary diameter structure comprises: the rolling bodies are arranged between the outer ring inner raceway and the inner ring outer raceway in a double-row mode; a spacer block is arranged between each row of rolling bodies; the section between the two double rows of rolling bodies forms an S-shaped positioning rotary structure, and the connecting line of the axial central points of the two rolling bodies is in a staggered parallel design;
furthermore, sealing rings are respectively arranged between two end faces of the outer ring, which are in contact with the inner ring, so that the dustproof effect of the rolling body in the bearing is ensured, and grease is prevented from entering;
furthermore, the double-row rolling bodies are divided into a first row of rolling bodies and a second row of rolling bodies according to the axial direction of the bearing, oil grooves are respectively arranged on raceways between the first row of rolling bodies and the outer ring and between the first row of rolling bodies and the inner ring, and the two oil grooves divide the upper raceways of the inner ring and the outer ring into four-section structures; the raceways between the second row of rolling bodies and the outer ring and the inner ring are also respectively provided with oil grooves, and the two oil grooves divide the inner ring and the outer ring into four sections;
two of the four raceways in contact with the first row of rolling elements and two of the four raceways in contact with the second row of rolling elements are close to the S-shaped positioning slewing structure; the four sections of raceways close to the S-shaped positioning rotary structure are respectively a first raceway, a second raceway, a third raceway and a fourth raceway; the first raceway is close to the S-shaped positioning rotation structure, the included angle between the segment from the edge of the first raceway to the spherical center and the horizontal line is larger than the included angle between the segment from the S-shaped positioning rotation diameter to the spherical center and the horizontal line, and the truncation angle is larger than 90 degrees;
the fourth roller path is close to the S-shaped positioning rotation structure, the included angle between the segment from the edge of the fourth roller path to the spherical center and the horizontal line is smaller than the included angle between the segment from the S-shaped positioning rotation diameter to the spherical center and the horizontal line, and the truncation angle is smaller than 90 degrees;
furthermore, the half wrap angle of the bearing adopting the structure is larger than 20 degrees, namely, the half of the effective raceway length angle;
furthermore, the contact angle of the bearing adopting the structure is 45 degrees, namely the included angle between a connecting line between the center of the sphere and one half of the length of the raceway and the horizontal line;
compared with the traditional four-point contact ball structure, the bearing adopting the structure has more ideal numerical values of the cutoff angle and the half-enveloping angle, and greatly eliminates the cut-off angle formed after loading;
the bearing adopting the traditional four-point contact ball structure has a half enveloping angle of about 20 degrees and a cutting angle of about 90 degrees;
the cutting-out angle is the part where edge contact occurs and the half-envelope angle exceeds the cutoff angle.
According to the invention, according to specific numerical values of radial load, axial load and overturning moment born by the bearing, through calculation and finite element analysis, the most suitable main parameters are selected, wherein the main parameters comprise the wall thickness of a ferrule, the number of rolling elements, the longitudinal thickness of a raceway, a contact angle numerical value, a half-wrap angle numerical value, a truncation angle numerical value, a cut-out angle numerical value and a negative play numerical value.
The beneficial effect that adopts above-mentioned structure to bring is:
the S-shaped positioning rotary diameter structure of the rolling body achieves the variable pre-tightening effect on the basis of the original negative clearance between the rolling body and the raceway under the actual loading condition. The Hertz contact stress generated between the steel ball and the ferrule is greatly reduced, and the load borne by a single rolling body is reduced;
the S-shaped positioning rotary diameter structure of the rolling body effectively solves the actual rollover phenomenon of the yaw bearing, and the traditional design of the same diameter of a four-point contact ball is cancelled, so that the bearing can bear the stress generated by multi-directional complex alternating load, and the stress transmitted to the yaw bearing from the ultrahigh engine room and the super-flexible tower cylinder is more uniform;
the stress distribution form of the S-shaped positioning rotation diameter is in an S-shaped mode, and the strength of the ferrule is strengthened from the view of the load transmitted to the yaw bearing by the extremely high engine room and the super-flexible tower drum, so that the effect of randomly adjusting the theoretical value under the tilting action of each row of roller paths and the rolling bodies is achieved;
the variable pre-tightening structure eliminates the deformation of a ferrule caused when the steel ball of the traditional four-point contact ball bearing bears the radial stress transmitted by high overturning moment; the negative play effect of the bearing can be that the edge stress formed after the raceway is loaded is lower, the numerical values of the cutoff angle and the half-enveloping angle are more ideal, the cut-out angle formed after the raceway is loaded is greatly eliminated, and the numerical value of the negative play can be adjusted through establishing an FEA model and calculating by finite element analysis;
the yaw bearing is suitable for onshore low-wind-speed and large-scale offshore wind turbines of 2MW to 10MW and floating wind turbines, and can ensure stable operation even if severe deformation occurs in an extremely high engine room and an ultra-flexible tower;
the quenching process of the raceway heat treatment adopts a non-soft-belt scanning type machine tool quenching device, can deal with various dispersed variable contact type raceways, and greatly improves the reliability of the raceway in the bearing;
the high-end vertical mill equipment is used for carrying out superfine processing on the roller path, so that the excellent roughness and waviness are ensured to be processed while the shape of the roller path is ensured, and the purpose of ultra-large and superfine processing is achieved.
Drawings
FIG. 1 is a view of the assembly structure of an S-shaped positioning rotating diameter variable pre-tightening yaw bearing.
FIG. 2 is an enlarged view of the inside of the S-shaped positioning rotating diameter variable pre-tightening yaw bearing.
FIG. 3 is a structural diagram of a cutting-off angle and a half-enveloping angle of an S-shaped positioning rotating diameter variable pre-tightening yaw bearing.
In the figure, 01, an outer ring, 02, an inner ring, 04, a rolling body, 04-1, a first row of rolling bodies, 04-2, a second row of rolling bodies, 05, an oil groove, 06 a spacer block, 58 a sealing ring, 03. S-shaped positioning rotation diameter, a cut-off angle, b, a half-envelope angle, c, a contact angle, d, a contact elliptic projection, 1, a first raceway, 2, a second raceway, 3, a third raceway, 4 and a fourth raceway.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1-3, the yaw bearing of the S-shaped positioning slewing ring structure comprises: the rolling bearing comprises an outer ring 01, an inner ring 02 and rolling bodies 04 arranged between the outer ring 01 and the inner ring 02, wherein the rolling bodies are arranged between an inner raceway of the outer ring 01 and an outer raceway of the inner ring 02 in a double-row mode; a spacer block 06 is arranged between each row of rolling bodies 04; the section between the two double rows of rolling bodies forms an S-shaped positioning rotary structure, and the connecting line of the axial central points of the two rolling bodies 04 is in a staggered parallel design;
furthermore, sealing rings 58 are respectively arranged between two end faces of the outer ring 01, which are in contact with the inner ring 02, so that the rolling bodies 04 in the bearing are protected from dust, and grease is prevented from entering;
further, the double-row rolling bodies are divided into a first row of rolling bodies 04-1 and a second row of rolling bodies 04-2 by taking the axial direction of the bearing as a reference, oil grooves 05 are respectively arranged on raceways between the first row of rolling bodies 04-1 and the outer ring 01 and between the first row of rolling bodies and the inner ring 02, and the raceways on the inner ring 02 and the outer ring 01 are divided into four-section structures by the two oil grooves 05; the raceways between the second row of rolling elements 04-2 and the outer ring 01 and the inner ring 02 are also respectively provided with oil grooves 05, and the two oil grooves 05 divide the raceways on the inner ring 02 and the outer ring 01 into four-section structures;
two of the four raceways in contact with the first row of rolling elements 04-1 and two of the four raceways in contact with the second row of rolling elements 04-2 are close to the S-shaped positioning revolution structure; the four sections of raceways close to the S-shaped positioning rotary structure are respectively a first raceway 1, a second raceway 2, a third raceway 3 and a fourth raceway 4; the first raceway 1 is close to the S-shaped positioning rotation structure, the included angle between the segment from the edge of the first raceway to the spherical center and the horizontal line is larger than the included angle between the segment from the S-shaped positioning rotation diameter 03 to the spherical center and the horizontal line, namely, the cut-off angle a is larger than 90 degrees;
the fourth roller path 4 is close to the S-shaped positioning rotary structure, the included angle between the segment from the edge of the fourth roller path to the spherical center and the horizontal line is smaller than the included angle between the segment from the S-shaped positioning rotary diameter 03 to the spherical center and the horizontal line, namely, the cut-off angle a is smaller than 90 degrees;
further, the half wrap angle b of the bearing adopting the structure is larger than 20 degrees, namely, the half of the effective raceway length angle;
furthermore, the contact angle c of the bearing adopting the structure is 45 degrees, namely the included angle between a connecting line between the center of the sphere and one half of the length of the raceway and the horizontal line;
compared with the traditional four-point contact ball structure, the bearing adopting the structure has more ideal numerical values of the cutoff angle and the half-enveloping angle, and greatly eliminates the cut-off angle formed after loading.
The contact elliptic projection outside the raceway in the structure is larger than the contact area of the traditional four-point contact ball due to the variable negative clearance, and the value of the negative clearance can be adjusted according to calculation.
Claims (8)
- The driftage bearing of S-shaped location gyration footpath structure, its characterized in that includes: the rolling bodies are arranged between the outer ring inner raceway and the inner ring outer raceway in a double-row mode; a spacer block is arranged between each row of rolling bodies; the section between the two double rows of rolling bodies forms an S-shaped positioning rotary structure, and the connecting line of the axial central points of the two rolling bodies is in a staggered parallel design.
- 2. An S-shaped positioning slewing ring structure yaw bearing according to claim 1, wherein: and sealing rings are respectively arranged between the two end surfaces of the outer ring and the inner ring.
- 3. An S-shaped positioning slewing ring structure yaw bearing according to claim 1, wherein: the double-row rolling bodies are divided into a first row of rolling bodies and a second row of rolling bodies by taking the axial direction of the bearing as a reference, oil grooves are respectively arranged on raceways between the first row of rolling bodies and the outer ring and between the first row of rolling bodies and the inner ring, and the two oil grooves divide the inner ring and the outer ring into four sections; and the raceways between the second row of rolling bodies and the outer ring and between the second row of rolling bodies and the inner ring are also respectively provided with oil grooves, and the two oil grooves divide the inner ring and the upper raceway of the outer ring into four-section structures.
- 4. An S-shaped positioning slewing ring structure yaw bearing according to claim 3, wherein: two of the four raceways in contact with the first row of rolling elements and two of the four raceways in contact with the second row of rolling elements are both close to the S-shaped positioning revolution structure; the four sections of raceways close to the S-shaped positioning rotary structure are respectively a first raceway, a second raceway, a third raceway and a fourth raceway; the first raceway is close to the S-shaped positioning rotation structure, the included angle between the edge of the first raceway and the spherical center line segment and the horizontal line is larger than the included angle between the S-shaped positioning rotation diameter and the spherical center line segment and the horizontal line, and the truncation angle is larger than 90 degrees.
- 5. An S-shaped positioning slewing ring structure yaw bearing according to claim 4, wherein: the fourth roller path is close to the S-shaped positioning rotation structure, the included angle between the edge of the fourth roller path and the spherical center line segment and the horizontal line is smaller than the included angle between the S-shaped positioning rotation diameter and the spherical center line segment and the horizontal line, and the truncation angle is smaller than 90 degrees.
- 6. An S-shaped positioning slewing bearing according to any one of claims 1-5, characterized in that: the half enveloping angle of the bearing adopting the structure is larger than 20 degrees; the half envelope angle is half of the effective raceway length angle.
- 7. An S-shaped positioning slewing bearing according to any one of claims 1-5, characterized in that: the contact angle of the bearing adopting the structure is 45 degrees; the contact angle is the included angle between a connecting line between the sphere center and one half of the length of the raceway and the horizontal line.
- 8. An S-shaped positioning slewing ring structure yaw bearing according to claim 6 or 7, characterized in that: the stress distribution form of the S-shaped positioning rotary diameter structure is in an S-shaped mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911379285.3A CN110848267A (en) | 2019-12-27 | 2019-12-27 | Yaw bearing of S-shaped positioning rotary diameter structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911379285.3A CN110848267A (en) | 2019-12-27 | 2019-12-27 | Yaw bearing of S-shaped positioning rotary diameter structure |
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| Publication Number | Publication Date |
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| CN110848267A true CN110848267A (en) | 2020-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911379285.3A Pending CN110848267A (en) | 2019-12-27 | 2019-12-27 | Yaw bearing of S-shaped positioning rotary diameter structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112329305A (en) * | 2020-11-05 | 2021-02-05 | 中车株洲电力机车研究所有限公司 | Method for determining position and polishing amount of soft belt of variable-pitch bearing of wind turbine generator |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201475162U (en) * | 2009-09-01 | 2010-05-19 | 常州光洋轴承有限公司 | Special bearing for yaw system of megawatt wind turbine |
| CN201739343U (en) * | 2010-07-02 | 2011-02-09 | 马鞍山统力回转支承有限公司 | Elliptical raceway double-row eight-point contact type slewing bearing |
| CN102602245A (en) * | 2011-01-20 | 2012-07-25 | 株式会社捷太格特 | Wheel rolling bearing device |
| CN103562574A (en) * | 2011-06-01 | 2014-02-05 | 乌本产权有限公司 | Large rolling bearing |
| CN103765025A (en) * | 2011-08-23 | 2014-04-30 | Ntn株式会社 | Roller bearing |
| CN204226426U (en) * | 2014-11-13 | 2015-03-25 | 上海人本双列轴承有限公司 | A kind of two-row ball bearing |
| CN211288484U (en) * | 2019-12-27 | 2020-08-18 | 瓦房店轴承集团国家轴承工程技术研究中心有限公司 | Yaw bearing of S-shaped positioning rotary diameter structure |
-
2019
- 2019-12-27 CN CN201911379285.3A patent/CN110848267A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201475162U (en) * | 2009-09-01 | 2010-05-19 | 常州光洋轴承有限公司 | Special bearing for yaw system of megawatt wind turbine |
| CN201739343U (en) * | 2010-07-02 | 2011-02-09 | 马鞍山统力回转支承有限公司 | Elliptical raceway double-row eight-point contact type slewing bearing |
| CN102602245A (en) * | 2011-01-20 | 2012-07-25 | 株式会社捷太格特 | Wheel rolling bearing device |
| CN103562574A (en) * | 2011-06-01 | 2014-02-05 | 乌本产权有限公司 | Large rolling bearing |
| CN103765025A (en) * | 2011-08-23 | 2014-04-30 | Ntn株式会社 | Roller bearing |
| CN204226426U (en) * | 2014-11-13 | 2015-03-25 | 上海人本双列轴承有限公司 | A kind of two-row ball bearing |
| CN211288484U (en) * | 2019-12-27 | 2020-08-18 | 瓦房店轴承集团国家轴承工程技术研究中心有限公司 | Yaw bearing of S-shaped positioning rotary diameter structure |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112329305A (en) * | 2020-11-05 | 2021-02-05 | 中车株洲电力机车研究所有限公司 | Method for determining position and polishing amount of soft belt of variable-pitch bearing of wind turbine generator |
| CN112329305B (en) * | 2020-11-05 | 2023-10-20 | 中车株洲电力机车研究所有限公司 | Method for determining soft belt position and polishing amount of variable-pitch bearing of wind turbine generator |
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