CN213981054U - Connecting structure of wind power blade and variable pitch bearing - Google Patents
Connecting structure of wind power blade and variable pitch bearing Download PDFInfo
- Publication number
- CN213981054U CN213981054U CN202022586858.4U CN202022586858U CN213981054U CN 213981054 U CN213981054 U CN 213981054U CN 202022586858 U CN202022586858 U CN 202022586858U CN 213981054 U CN213981054 U CN 213981054U
- Authority
- CN
- China
- Prior art keywords
- double
- round sleeve
- sleeve
- low
- wind power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
Landscapes
- Wind Motors (AREA)
Abstract
The utility model provides a wind-powered electricity generation blade and becomes connection structure of oar bearing, the right-hand member of every double-threaded screw passes behind flange, the O type rubber circle and a pre-buried bolt cover threaded connection right, becomes oar bearing outer lane connecting bolt and passes behind the outer lane of becoming the oar bearing and wind wheel hub threaded connection. The automatic bolt centering device comprises a high round sleeve and a low round sleeve. The right-hand member of high circle cover and the left end sphere of low circle cover slide and link to each other, and the hole diameter of high circle cover, low circle cover is greater than the diameter of double-end screw rod, and the left end of double-end screw rod passes low circle cover, high circle cover left in proper order and behind the nut threaded connection the right-hand member of high circle cover and the left end laminating of low circle cover are in the same place. Utilize the utility model discloses double-end screw can not receive the bending force when the fastening, and then is favorable to improving double-end screw's life, also is favorable to reducing wind-powered electricity generation equipment's fault rate.
Description
Technical Field
The utility model relates to a wind generating set installs technical field, concretely relates to wind-powered electricity generation blade and becomes the connection structure of oar bearing.
Background
As a precise device, the wind generating set runs in the field with poor natural conditions for a long time, and each detail on the fan must be paid attention to ensure the long-time effective work of the fan, so that each part is carefully cared. The appearance of the fan mainly comprises four parts: tower, nacelle, wheel load, blade. And the four parts need to be connected by bolts. Therefore, in the installation process of the fan, the normal operation and the power generation efficiency of the fan in the future can be directly influenced by the quality of the bolt fastening effect, and the service life of the blade and blade root bolt directly influences the use and maintenance cost of the wind power generation equipment.
The publication No. CN103061995B, Chinese patent document entitled "megawatt wind turbine blade root screw embedding process method", publication No. CN200910049234, and Chinese patent document entitled "megawatt wind turbine blade root bolt installation and positioning method" disclose the structure of the existing wind turbine blade root bolt and the corresponding installation method. However, as the length of the wind turbine blade is longer and longer, the weight of the blade is heavier and heavier, and the blade with the embedded bolt sleeve at the blade root is more and more popular in the market due to the characteristics of strong bearing capacity, small damage to glass fiber reinforced plastics and the like, so that the blade root structure becomes mainstream. However, the main material of the blade is glass fiber reinforced plastic, which has shrinkage deformation during the molding process and an error during the mold closing process, which may cause a large deviation of the verticality and the position degree of the embedded bolt sleeve. In addition, when the blade is spliced with the variable-pitch bearing, the installation method is improper, and the spliced holes are staggered. When the problems are met, if the traditional bolt is still connected with the variable-pitch bearing, the bolt can incline, misplace and the like, so that the bolt interferes with the variable-pitch bearing, the bolt is bent, the bolt bears additional stress, and finally the bolt is broken. Therefore, necessary preventive control measures are required to be taken from the connection structure design and the splicing installation process to adjust the occurrence of abnormal states such as inclination and dislocation of the bolts, so that the interference of the bolts is avoided, the fatigue strength of the bolts is improved, and the service life of the bolts is prolonged.
Disclosure of Invention
The main object of the present invention is to provide a new connection structure for wind turbine blades and pitch bearings, so as to effectively prevent the adverse effect caused by misalignment of bolts (hereinafter referred to as "stud") connecting the wind turbine blades and the pitch bearings, thereby further prolonging the service life of the stud, and further facilitating the reduction of the failure rate of the wind turbine generator.
A new wind-powered electricity generation blade and the used technical scheme of connection structure who becomes oar bearing be: a connecting structure of a wind power blade and a variable pitch bearing comprises the variable pitch bearing, the wind power blade, a double-end screw and a nut. The wind power blade comprises a flange, a pre-buried bolt sleeve, a blade and an O-shaped rubber ring. The O-shaped rubber ring is arranged in the embedded bolt sleeve, and the left side of the O-shaped rubber ring is in contact connection with the right side of the flange. The right end of each double-head screw penetrates through the flange and the O-shaped rubber ring rightwards and then is in threaded connection with one embedded bolt sleeve, and the outer ring connecting bolt of the variable pitch bearing penetrates through the outer ring of the variable pitch bearing and then is in threaded connection with the wind wheel hub. The automatic bolt centering device comprises a high round sleeve and a low round sleeve. The right-hand member of high circle cover and the left end sphere of low circle cover slide and link to each other, and the hole diameter of high circle cover, low circle cover is greater than the diameter of double-end screw rod, and the left end of double-end screw rod passes low circle cover, high circle cover left in proper order and behind the nut threaded connection the right-hand member of high circle cover and the left end laminating of low circle cover are in the same place.
The utility model discloses utilize ingeniously to slide by the sphere between high circle cover, the low circle cover and link to each other for when the straightness that hangs down of pre-buried bolt cover and the position degree when the deviation appears, the nut leans on the surface of high circle cover one side also can parallel with the left surface of high circle cover, thereby makes double-end screw rod can not receive the bending force when the fastening, and then is favorable to improving double-end screw rod's life, also is favorable to reducing wind power generation equipment's fault rate.
Preferably, when the axis of the high round sleeve and the axis of the low round sleeve are collinear, the distance L between the free end surface of the high round sleeve and the free end surface of the low round sleeve is greater than or equal to 30 mm and less than or equal to 60 mm, the right end of the thread at the left end of the double-head screw is positioned in the automatic bolt centering device, and the thread at the right end of the double-head screw is positioned in the wind power blade. This preferred scheme, centering device make stud length increase, when being favorable to improving stud life, also can prevent that stud's screw thread section from getting into the adverse effect that brings in the oar bearing.
Preferably, the diameter of the middle polished rod section of the double-threaded screw is smaller than that of the thread sections of the two ends, the right end of the middle polished rod section of the double-threaded screw is positioned in the embedded bolt sleeve, and the left end of the middle polished rod section of the double-threaded screw is positioned in the inner hole of the low round sleeve; the inner ring of the O-shaped rubber ring is in interference connection with the polished rod part of the double-head screw, and the outer ring of the O-shaped rubber ring is in transition fit with the inner hole of the blade embedded bolt sleeve. Above preferred scheme is favorable to reducing the straightness that hangs down of buried bolt cover and the adverse effect that brings when the position degree deviation appears to a certain extent, and the cooperation structure of the interior outer lane of O type rubber circle and the hole of polished rod and blade buried bolt cover is favorable to guaranteeing double-end screw's centering state.
Preferably, the intersection angle alpha of the inner hole axis of the high round sleeve and the inner hole axis of the low round sleeve is less than or equal to 3 degrees, and when the intersection angle alpha of the inner hole axis of the high round sleeve and the inner hole axis of the low round sleeve is equal to 3 degrees, the contact surface of the high round sleeve and the low round sleeve does not exceed the corresponding spherical surface area of the low round sleeve. This preferred scheme, rational in infrastructure can satisfy the design purpose well.
To sum up, the utility model discloses, a wind-powered electricity generation blade and the connection structure who becomes oar bearing's beneficial effect is: because the spherical surface between the high round sleeve and the low round sleeve is skillfully utilized to be connected in a sliding manner, when the verticality and the position degree of the embedded bolt sleeve deviate, the surface of one side, close to the high round sleeve, of the nut can be parallel to the left surface of the high round sleeve, so that the double-end screw cannot be subjected to bending force, the service life of the double-end screw is prolonged, and the failure rate of the wind power generation equipment is reduced.
Drawings
FIG. 1: the structure of the utility model is shown schematically;
FIG. 2: the cross-sectional view of the automatic bolt centering device when the axes of the high round sleeve and the low round sleeve are collinear is schematic;
FIG. 3: the axes of the high round sleeve and the low round sleeve are not collinear;
FIG. 4: the connecting structure of the three positioning pins and one blade is schematically shown;
FIG. 5: the connecting structure of the double-head screw, the three positioning pins and one blade is schematically shown;
in the figure: the wind turbine comprises a wind wheel hub 1, a variable pitch bearing 2, a wind power blade 3, a flange 3-1, a pre-buried bolt sleeve 3-2, a blade 3-3, an O-shaped rubber ring 4, a double-headed screw 5, a bolt automatic centering device 6, a high round sleeve 6-1, a low round sleeve 6-2, a variable pitch bearing outer ring connecting bolt 7, a nut 8 and a positioning pin 9.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
As shown in fig. 1-5, the utility model discloses a become oar bearing 2, wind-powered electricity generation blade 3, double-end screw 5, nut 8. The wind power blade 3 comprises a flange 3-1, a pre-buried bolt sleeve 3-2, a blade 3-3 and an O-shaped rubber ring 4. The O-shaped rubber ring 4 is arranged in the embedded bolt sleeve 3-2, the left side of the O-shaped rubber ring 4 is contacted with the right side of the flange 3-1, and the more specific structural details of the wind power blade 3 are well known technology and are not described herein. The right end of each double-headed screw 5 penetrates through the flange 3-1 and the O-shaped rubber ring 4 rightwards and then is in threaded connection with one embedded bolt sleeve 3-2, and a variable pitch bearing outer ring connecting bolt 7 penetrates through the outer ring of the variable pitch bearing 2 and then is in threaded connection with the wind wheel hub 1. In addition, the bolt automatic centering device 6 is further included, the bolt automatic centering device 6 comprises a high round sleeve 6-1 and a low round sleeve 6-2, the right end of the high round sleeve 6-1 is connected with the left end of the low round sleeve 6-2 in a spherical sliding mode, the inner hole diameters of the high round sleeve 6-1 and the low round sleeve 6-2 are larger than the diameter of the double-threaded screw 5, the left end of the double-threaded screw 5 penetrates through the low round sleeve 6-2 and the high round sleeve 6-1 in sequence leftwards and then is in threaded connection with the nut 8, and the right end of the high round sleeve 6-1 is attached to the left end of the low round sleeve 6-2. When the axis of the high round sleeve 6-1 and the axis of the low round sleeve 6-2 are collinear, the distance L between the free end surface of the high round sleeve 6-1 and the free end surface of the low round sleeve 6-2 is more than or equal to 30 mm and less than or equal to 60 mm; the right end of the thread at the left end of the double-headed screw is positioned in the automatic bolt centering device, and the left end of the thread at the right end of the double-headed screw is positioned in the wind power blade. In addition, the outer diameter of the high round sleeve 6-1 is smaller than that of the low round sleeve 6-2, the intersection angle alpha of the inner hole axis of the high round sleeve 6-1 and the inner hole axis of the low round sleeve 6-2 is smaller than or equal to 3 degrees, and when the intersection angle alpha of the inner hole axis of the high round sleeve 6-1 and the inner hole axis of the low round sleeve 6-2 is equal to 3 degrees, the joint surface of the high round sleeve 6-1 and the low round sleeve 6-2 does not exceed the corresponding spherical surface area of the low round sleeve 6-2.
Preferably, the diameter of the middle polished rod section of the double-threaded screw 5 is smaller than that of the two threaded sections, the right end of the middle polished rod section of the double-threaded screw 5 is positioned in the embedded bolt sleeve 3-2, and the left end of the middle polished rod section of the double-threaded screw 5 is positioned in the inner hole of the low round sleeve 6-2. The left end of the thread section at the right end of the double-thread screw 5 and the right end of the middle polished rod section of the double-thread screw 5 are connected through a circular truncated cone-shaped left transition section with the diameter of the right end larger than that of the left end, and the right end of the thread section at the left end of the double-thread screw 5 is connected through a right transition section with the diameter of the left end larger than that of the right end. The inner ring of the O-shaped rubber ring 4 is in interference connection with the polished rod part of the double-head screw 5, and the outer ring is in transition fit with the inner hole of the embedded bolt sleeve 3-2.
The above-described embodiments are merely preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Indeed, many equivalent variations in the shapes, constructions and design objectives of the devices according to the present invention are possible. Therefore, all equivalent changes made in the shape, structure and design objectives of the present invention should be considered within the scope of the present invention, i.e. all equivalent changes should be protected by the present invention.
Claims (5)
1. A connection structure of a wind power blade and a variable pitch bearing comprises a variable pitch bearing (2), a wind power blade (3), a double-end screw (5) and a nut (8); the wind power blade (3) comprises a flange (3-1), a pre-buried bolt sleeve (3-2), a blade (3-3) and an O-shaped rubber ring (4); the O-shaped rubber ring (4) is arranged in the embedded bolt sleeve (3-2); the right end of each double-ended screw rod (5) penetrates through the flange (3-1) and the O-shaped rubber ring (4) rightwards and then is in threaded connection with one embedded bolt sleeve (3-2), and a variable pitch bearing outer ring connecting bolt (7) penetrates through the outer ring of the variable pitch bearing (2) and then is in threaded connection with the wind wheel hub (1); the method is characterized in that: the automatic bolt centering device (6) comprises a high round sleeve (6-1) and a low round sleeve (6-2); the right end of the high round sleeve (6-1) is connected with the left end of the low round sleeve (6-2) in a sliding mode, the inner hole diameters of the high round sleeve (6-1) and the low round sleeve (6-2) are larger than the diameter of the double-threaded screw (5), the left end of the double-threaded screw (5) sequentially penetrates through the low round sleeve (6-2) and the high round sleeve (6-1) leftwards and is connected with the nut (8) in a threaded mode, and the right end of the high round sleeve (6-1) is attached to the left end of the low round sleeve (6-2).
2. The connection structure of a wind power blade and a pitch bearing according to claim 1, wherein: when the axis of the high round sleeve (6-1) and the axis of the low round sleeve (6-2) are collinear, the distance L between the free end surface of the high round sleeve (6-1) and the free end surface of the low round sleeve (6-2) is more than or equal to 30 mm and less than or equal to 60 mm; the right end of the thread at the left end of the double-headed screw is positioned in the automatic bolt centering device, and the thread at the right end of the double-headed screw is positioned in the wind power blade.
3. The connection structure of a wind power blade and a pitch bearing according to claim 1, wherein: the diameter of the middle polished rod section of the double-threaded screw (5) is smaller than that of the two threaded sections, the right end of the middle polished rod section of the double-threaded screw (5) is positioned in the embedded bolt sleeve (3-2), and the left end of the middle polished rod section of the double-threaded screw is positioned in the inner hole of the low round sleeve (6-2).
4. The connection structure of a wind power blade and a pitch bearing according to claim 1, wherein: the inner ring of the O-shaped rubber ring (4) is in interference connection with the polished rod part of the double-head screw (5), and the outer ring of the O-shaped rubber ring is in transition fit with the inner hole of the embedded bolt sleeve (3-2).
5. The connection structure of a wind power blade and a pitch bearing according to claim 1, wherein: the intersection angle alpha of the inner hole axis of the high round sleeve (6-1) and the inner hole axis of the low round sleeve (6-2) is less than or equal to 3 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022586858.4U CN213981054U (en) | 2020-11-10 | 2020-11-10 | Connecting structure of wind power blade and variable pitch bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022586858.4U CN213981054U (en) | 2020-11-10 | 2020-11-10 | Connecting structure of wind power blade and variable pitch bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213981054U true CN213981054U (en) | 2021-08-17 |
Family
ID=77262026
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022586858.4U Active CN213981054U (en) | 2020-11-10 | 2020-11-10 | Connecting structure of wind power blade and variable pitch bearing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213981054U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302880A (en) * | 2020-11-10 | 2021-02-02 | 浙江运达风电股份有限公司 | Connecting structure of wind power blade and variable pitch bearing and application method thereof |
-
2020
- 2020-11-10 CN CN202022586858.4U patent/CN213981054U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112302880A (en) * | 2020-11-10 | 2021-02-02 | 浙江运达风电股份有限公司 | Connecting structure of wind power blade and variable pitch bearing and application method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8664792B2 (en) | Wind turbine and a shaft for a wind turbine | |
| US8011887B2 (en) | Rotor blade assembly | |
| US8556591B2 (en) | Systems and methods for assembling a rotor lock assembly for use in a wind turbine | |
| CA2526729C (en) | Rotor blade connection | |
| BRPI0808474A2 (en) | WIND POWER INSTALLATION ROTOR. | |
| US20110142657A1 (en) | Wind turbine blade attachment configuration with flattened bolts | |
| US9651028B2 (en) | System and method to provide for accurate alignment when mounting a wind turbine blade | |
| CN213981054U (en) | Connecting structure of wind power blade and variable pitch bearing | |
| CN108138752B (en) | Wind turbine with gear unit, method for mounting and method for upgrading the same | |
| WO2018113204A1 (en) | Centering fastener, methods for manufacturing and using same, and wind turbine | |
| US9261074B2 (en) | Variable bolt parameters for a wind turbine rotor blade | |
| CN112302880A (en) | Connecting structure of wind power blade and variable pitch bearing and application method thereof | |
| US20230366371A1 (en) | Wind turbine blade assembly and methods | |
| CN218882419U (en) | Connecting structure of wind driven generator segmented blade and wind driven generator blade | |
| CN109356793A (en) | Mounting rack, energy storage unit, variable pitch system, wind generating set and method | |
| US11913428B2 (en) | Wind turbine blade design | |
| CN214196921U (en) | Elastic connecting device for manhole cover plate of wind power blade | |
| CN113389818A (en) | Bolt connection mode for slewing bearing | |
| DK177956B1 (en) | Wind turbine with cable support system arranged in main shaft | |
| CN221120190U (en) | Lightning protection device for blade | |
| CN217107790U (en) | Maintenance-free bolt connecting device for wind generating set | |
| CN216342594U (en) | Anti-corrosion wind wheel locking device for wind turbine generator (at sea) | |
| CN114576244B (en) | Bending-resistant bolt connecting device for wind generating set and mounting method | |
| CN220539751U (en) | Wind wheel device for wind driven generator and wind driven generator | |
| CN211623622U (en) | Cabin elbow of wind driven generator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |