CN107620679B - Connecting structure and connecting method of blade and variable-pitch bearing and wind generating set - Google Patents
Connecting structure and connecting method of blade and variable-pitch bearing and wind generating set Download PDFInfo
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- CN107620679B CN107620679B CN201710702890.4A CN201710702890A CN107620679B CN 107620679 B CN107620679 B CN 107620679B CN 201710702890 A CN201710702890 A CN 201710702890A CN 107620679 B CN107620679 B CN 107620679B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The embodiment of the invention provides a connecting structure and a connecting method of a blade and a variable pitch bearing and a wind generating set, wherein the connecting structure comprises the blade and the variable pitch bearing, the blade flange of the blade passing through the root part is connected with the variable pitch bearing, two or more than three guide positioning blocks are arranged at intervals in the circumferential direction of the butt joint surface of the variable pitch bearing, and correspondingly, matching holes which are in one-to-one correspondence with the guide positioning blocks and are matched with the guide positioning blocks are arranged on the blade flange. According to the connecting structure of the blade and the variable-pitch bearing, provided by the embodiment of the invention, through the design of the guide positioning block and the matching hole, the blade and the variable-pitch bearing can be centered when being connected, so that the stress at the position of the blade root after the blade is connected is uniform, the problem of hole error of a bolt caused by the fact that the blade cannot be centered in the assembling process is avoided, and the bolt for connecting the blade is prevented from being cut off in the operation process of a wind generating set.
Description
Technical Field
The invention relates to the technical field of wind power generation, in particular to a connecting structure and a connecting method of a blade and a variable-pitch bearing and a wind generating set.
Background
The blades of the wind generating set are butted with the variable-pitch bearing through the flange structure, the flange structure and the variable-pitch bearing need to be centered in the butting process, and the flange structure and the variable-pitch bearing are difficult to be centered by using a common centering structure due to the fact that the flange structure and the variable-pitch bearing are large in size. If the flange structure and the variable-pitch bearing cannot be accurately centered, the problem of bolt hole dislocation is caused, and bolts for connecting the blades are cut off in the process that the blades are driven by wind; the root of the blade is subjected to uneven stress action, and local stress concentration is caused, so that the blade is easy to damage in the process of being driven by wind to rotate and being driven by a variable pitch mechanism to change the pitch.
Disclosure of Invention
In view of the above technical problems, embodiments of the present invention provide a connection structure, a connection method, and a wind turbine generator system for a blade and a pitch bearing, which solve the technical problem of centering when the blade is connected with the pitch bearing.
According to an aspect of an embodiment of the present invention, a connection structure of a blade and a pitch bearing is provided, which includes a blade and a pitch bearing, wherein a blade flange of the blade passing through a root portion is connected to the pitch bearing, two or more than three guide positioning blocks are arranged at intervals in a circumferential direction of a butt-joint surface of the pitch bearing, and correspondingly, fitting holes corresponding to the guide positioning blocks in a one-to-one and fitting manner are formed in the blade flange.
Optionally, the guide positioning block is located on the inner side or the outer side of the bolt hole in the radial direction on the butt joint surface of the pitch bearing, or located between two adjacent bolt holes.
Optionally, the guide locating block is integrally formed on the abutment surface of the pitch bearing.
Optionally, a positioning hole is formed in the butt joint surface of the pitch bearing corresponding to the guide positioning block, a fixed end of the rear end of the guide positioning block is installed in the positioning hole, and a guide positioning end of the front end protrudes out of the butt joint surface of the pitch bearing.
Optionally, the guide positioning block is fastened with the positioning hole.
Optionally, a thread is processed in the positioning hole, and the fixed end of the guide positioning block is connected with the positioning hole through the thread.
Optionally, the fixed end of the guiding and positioning block is connected with the positioning hole in an interference fit manner.
Optionally, the fixed end of the guiding and positioning block is connected with the positioning hole in a gluing mode.
Optionally, the leading end of the guide positioning end is provided with a sloped guide surface.
Alternatively, the guide surface is a tapered surface, and correspondingly, the engagement hole is a tapered hole.
Optionally, the rear side of the guide surface of the guide positioning end is a cylindrical surface, and correspondingly, the outer end part of the matching hole is provided with a cylindrical hole matched with the cylindrical surface.
Optionally, when there are more than three guide positioning blocks, the guide positioning blocks are evenly distributed around the circumference of the abutment surface of the pitch bearing.
According to another aspect of the embodiments of the present invention, there is also provided a method of connecting a blade to a pitch bearing, comprising:
arranging a guide positioning block on the variable-pitch bearing;
connecting the guide positioning blocks on the variable pitch bearing with the matching holes of the blade flanges in a one-to-one alignment manner;
and installing and fastening bolts between the variable-pitch bearing and the blade flange.
According to another aspect of the embodiment of the invention, a wind generating set is further provided, which comprises the connecting structure of the blade and the pitch bearing.
According to the connecting structure and the connecting method of the blade and the variable-pitch bearing and the wind generating set, provided by the embodiment of the invention, through the design of the guide positioning block and the matching hole, the blade and the variable-pitch bearing can be centered when being connected, so that the stress at the position of a blade root after the blade is connected is uniform, the problem of hole error of a bolt caused by the fact that the blade cannot be centered in the assembling process is avoided, and the bolt for connecting the blade is prevented from being cut off in the operation process of the wind generating set.
Drawings
The invention may be better understood from the following description of specific embodiments thereof taken in conjunction with the accompanying drawings, in which:
other features, objects and advantages of the invention will become apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings in which like or similar reference characters refer to the same or similar parts.
FIG. 1 is a schematic end view of a connection structure of a blade and a pitch bearing according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view of section A-A of FIG. 1;
fig. 3 is a partially enlarged structural diagram of B in fig. 2.
In the figure:
100. a blade;
200. a pitch bearing; 201. positioning holes;
300. a blade flange; 301. a mating hole; 302. a bolt;
400. guiding a positioning block; 401. a fixed end; 402. and guiding the positioning end.
Detailed Description
Features and exemplary embodiments of various aspects of the present invention will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific configuration and algorithm set forth below, but rather covers any modification, replacement or improvement of elements, components or algorithms without departing from the spirit of the invention. In the drawings and the following description, well-known structures and techniques are not shown in order to avoid unnecessarily obscuring the present invention.
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. In the drawings, the thickness of regions and layers may be exaggerated for clarity. The same reference numerals denote the same or similar structures in the drawings, and thus detailed descriptions thereof will be omitted.
Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention may be practiced without one or more of the specific details, or with other methods, components, materials, and so forth. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention.
As shown in fig. 1 to 3, an embodiment of the present invention provides a connection structure of a blade and a pitch bearing, including a blade 100 and a pitch bearing 200, wherein the blade 100 is connected to the pitch bearing 200 through a blade flange 300 at a root portion, and is characterized in that two or more than three guide positioning blocks 400 are arranged at intervals in a circumferential direction of a butt-joint surface of the pitch bearing 200, and correspondingly, fitting holes 301 corresponding to the guide positioning blocks 400 in a one-to-one and adaptive manner are formed in the blade flange 300
The depth of the fitting hole 301 may be greater than the height of the guide positioning block 400 protruding from the abutment surface of the pitch bearing, or may be less than the height of the guide positioning block 400 protruding from the abutment surface of the pitch bearing 200. When the depth of the fitting hole 301 is greater than the height of the guide positioning block 400 protruding from the abutting surface of the pitch bearing 200, the fitting hole 301 may be a blind hole or a through hole; when the depth of the fitting hole 301 is smaller than the height of the guide positioning block 400 protruding out of the butt joint surface of the pitch bearing 200, the fitting hole 301 is a through hole; the depth of the fitting hole 301 may also be equal to the height of the guide positioning block 400 protruding from the abutment surface of the pitch bearing 200.
According to the connecting structure of the blade and the variable pitch bearing provided by the embodiment of the invention, through the design of the guide positioning block 400 and the matching hole 301, the blade 100 and the variable pitch bearing 200 can be centered when being connected, so that the stress at the blade root position after the blade 100 is connected is uniform, the problem of hole error of the bolt 302 caused by poor centering in the blade assembly process is avoided, and the bolt for connecting the blade is prevented from being cut off in the operation process of the wind generating set.
Optionally, in the connection structure of the blade and the pitch bearing provided by the embodiment of the present invention, the guiding and positioning block 400 is located on the inner side or the outer side of the bolt hole in the radial direction on the butt joint surface of the pitch bearing 200, or located between two adjacent bolt holes; generally, to avoid affecting the bolt 302 connection between the blade flange 300 and the pitch bearing 200, it is necessary to position the pilot positioning block 400 at a position different from the bolt hole on the pitch bearing 200; the size of the guide positioning block 400 can be determined according to the actual use requirement, and the guide positioning block should not be too large, so that the mechanical performance of the blade flange 300 is prevented from being influenced by the oversize of the matching hole 301 matched and connected with the guide positioning block 400; when the size of the fitting hole 301 is too large, the distance between the fitting hole 301 and the edge of the blade flange 300 and the bolt hole on the blade flange 300 is too small, so that the stability of the blade flange 300 is affected; the size of the guide positioning block 400 may be designed with reference to the size of the bolt hole, and may be 0.5 to 2 times the diameter of the bolt hole.
Optionally, in the connection structure of the blade and the pitch bearing provided by the embodiment of the present invention, the guide positioning block 400 is integrally formed on the abutting surface of the pitch bearing 200. For example, the guide positioning block 400 may be reserved on the abutting surface of the pitch bearing 200 in the casting process of the pitch bearing 200, or the guide positioning block 400 may be fixedly connected to the abutting surface of the pitch bearing 200 by welding or bonding.
Optionally, in the connection structure between the blade and the pitch bearing provided in the embodiment of the present invention, the guide positioning block 400 and the pitch bearing 200 may also be detachably connected, for example:
corresponding to the guide positioning block 400, a positioning hole 201 is formed in the butt joint face of the pitch bearing 200, a fixed end 401 at the rear end of the guide positioning block 400 is installed in the positioning hole 201, the rear end of the guide positioning block 400 is positioned through the positioning hole 201, and a guide positioning end 402 at the front end protrudes out of the butt joint face of the pitch bearing 200 to be connected with the matching hole 301 in a matching mode.
Optionally, in the connection structure of the blade and the pitch bearing provided by the embodiment of the present invention, the guide positioning block 400 and the positioning hole 201 may be fastened and connected in a variety of ways, for example:
threads are machined in the positioning hole 201, and the fixed end 401 of the guide positioning block 400 is connected with the positioning hole 201 through the threads;
the fixed end 401 of the guide positioning block 400 is connected with the positioning hole 201 in an interference fit manner;
the fixed end 401 of the guiding and positioning block 400 is connected with the positioning hole 201 in a gluing manner.
Optionally, in the connection structure of the blade and the pitch bearing provided by the embodiment of the present invention, in order to enable the guide positioning block 400 to have a better guide guiding function, an inclined guide surface is provided at the front end of the guide positioning end 402, so that the guide positioning block 400 is connected with the fitting hole 301 and centered under the action of the inclined guide surface; the inclined guide surface may be a regular inclined surface, a combination of a plurality of inclined surfaces, or a tapered surface. When the guide surface is a conical surface, the fitting hole 301 is a conical hole, and the pitch bearing 200 and the bolt hole on the blade flange 300 are aligned and connected by the automatic centering action of the conical surface and the conical hole.
Optionally, in the connection structure of the blade and the pitch bearing provided by the embodiment of the present invention, the rear side of the guide surface of the guide positioning end 402 is a cylindrical surface, and accordingly, the outer end of the fitting hole 301 is provided with a cylindrical hole that fits the cylindrical surface, and the cylindrical surface can provide a supporting function, so that after the guide positioning block 400 is guided by the fitting hole 301 on the blade flange 300, the guide positioning block and the fitting hole 301 can also be positioned by the cylindrical surface.
When the number of the guide positioning blocks 400 is more than three, the guide positioning blocks 400 are uniformly distributed around the circumferential direction of the butt joint surface of the pitch bearing 200, so that the plurality of guide positioning blocks 400 of the pitch bearing 200 jointly realize the centering effect.
The embodiment of the invention also provides a method for connecting the blade and the variable-pitch bearing, which comprises the following steps:
a guide positioning block 400 is arranged on the variable pitch bearing 200;
connecting the guide positioning blocks 400 on the variable pitch bearing 200 with the matching holes of the blade flange 300 in a one-to-one alignment manner;
bolts are installed and fastened between the pitch bearing 200 and the blade flange 300.
According to the method for connecting the blade and the variable pitch bearing, provided by the embodiment of the invention, automatic centering is realized through the guide positioning block 400 and the matching hole 301, so that the stress distribution of the root part of the blade is uniform, and the phenomenon of stress concentration generated after the blade 100 is connected with the variable pitch bearing 200 is avoided.
The embodiment of the invention also provides a wind generating set which comprises the connecting structure of the blade and the variable-pitch bearing provided by the embodiment. According to the wind generating set provided by the embodiment of the invention, in the process of connecting the blades with the variable-pitch bearing, the automatic centering is realized through the guide positioning block 400 and the matching hole 301, so that the stress distribution of the root parts of the blades is uniform, and the phenomenon of stress concentration is avoided; the problem of bolt hole error caused by the fact that the blade is not aligned in the process of assembling the blade is also avoided, and therefore the bolts for connecting the blades are prevented from being cut off in the running process of the wind generating set.
It will be appreciated by persons skilled in the art that the above embodiments are illustrative and not restrictive. Different features which are present in different embodiments may be combined to advantage. Other variations to the disclosed embodiments can be understood and effected by those skilled in the art upon studying the drawings, the specification, and the claims. In the claims, the term "comprising" does not exclude other means or steps; the indefinite article "a" does not exclude a plurality; the terms "first" and "second" are used to denote a name and not to denote any particular order. Any reference signs in the claims shall not be construed as limiting the scope. The functions of the various parts appearing in the claims may be implemented by a single hardware or software module. The mere fact that certain measures are recited in mutually different dependent claims does not indicate that a combination of these measures cannot be used to advantage.
Claims (9)
1. A connecting structure of a blade and a variable pitch bearing comprises the blade (100) and the variable pitch bearing (200), wherein the blade (100) is connected with the variable pitch bearing (200) through a blade flange (300) at the root part, and is characterized in that two or more than three guide positioning blocks (400) are arranged at intervals in the circumferential direction of a butt joint surface of the variable pitch bearing (200), and matching holes (301) which correspond to the guide positioning blocks (400) one by one and are matched with each other are correspondingly arranged on the blade flange (300);
the front end of a guide positioning end (402) of the guide positioning block (400) is provided with an inclined guide surface, the guide surface is a conical surface, the matching hole (301) is a conical hole, the variable pitch bearing (200) is aligned and connected with a bolt hole on the blade flange (300) through the centering of the conical surface and the conical hole, the rear side of the guide surface of the guide positioning end (402) is a cylindrical surface and correspondingly, the outer end of the matching hole (301) is provided with a column hole matched with the cylindrical surface, a positioning hole (201) is arranged on the butt joint surface of the variable pitch bearing (200) corresponding to the guide positioning block (400), a fixed end (401) of the rear end of the guide positioning block (400) is installed in the positioning hole (201), and the radial size of the cylindrical surface is larger than that of the positioning hole (201).
2. The blade to pitch bearing connection of claim 1,
the guide positioning block (400) is located on the inner side or the outer side of the bolt hole in the radial direction on the butt joint surface of the variable-pitch bearing (200), or located between two adjacent bolt holes.
3. A blade to pitch bearing connection according to claim 1 or 2,
the guide positioning block (400) is integrally formed on the butt joint surface of the variable pitch bearing (200).
4. A blade to pitch bearing connection according to claim 1 or 2,
the guide positioning end (402) of the front end protrudes out of the butt joint surface of the variable pitch bearing (200).
5. The blade to pitch bearing connection of claim 4,
the guide positioning block (400) is fixedly connected with the positioning hole (201).
6. The blade to pitch bearing connection of claim 5,
threads are machined in the positioning hole (201), and the fixed end of the guide positioning block (400) is connected with the positioning hole (201) through the threads; or
The fixed end of the guide positioning block (400) is connected with the positioning hole (201) in an interference fit mode; or
The fixed end of the guide positioning block (400) is connected with the positioning hole (201) in a gluing mode.
7. The blade to pitch bearing connection of claim 1,
when the number of the guide positioning blocks (400) is more than three, the guide positioning blocks are uniformly distributed around the circumferential direction of the butt joint surface of the variable pitch bearing (200).
8. A method of connecting a blade to a pitch bearing connection using a blade according to any of claims 1 to 7, comprising:
a guide positioning block (400) is arranged on the variable-pitch bearing (200);
connecting the guide positioning blocks (400) on the variable pitch bearing (200) with the matching holes of the blade flange (300) in a one-to-one alignment manner;
mounting bolts between the pitch bearing (200) and the blade flange (300) and fastening.
9. A wind power plant characterized in that it comprises a blade and pitch bearing connection according to any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710702890.4A CN107620679B (en) | 2017-08-16 | 2017-08-16 | Connecting structure and connecting method of blade and variable-pitch bearing and wind generating set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710702890.4A CN107620679B (en) | 2017-08-16 | 2017-08-16 | Connecting structure and connecting method of blade and variable-pitch bearing and wind generating set |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107620679A CN107620679A (en) | 2018-01-23 |
| CN107620679B true CN107620679B (en) | 2020-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201710702890.4A Active CN107620679B (en) | 2017-08-16 | 2017-08-16 | Connecting structure and connecting method of blade and variable-pitch bearing and wind generating set |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116335887A (en) * | 2022-11-30 | 2023-06-27 | 北京金风科创风电设备有限公司 | Support assembly and wind generating set |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2435340B1 (en) * | 2012-06-15 | 2014-12-05 | Gamesa Innovation & Technology, S.L. | Fixing system for wind turbines and method of placement |
| CN204493087U (en) * | 2015-03-24 | 2015-07-22 | 北京金风科创风电设备有限公司 | The mounting structure of pitch variable bearings and the impeller of wind-driven generator |
| CN204941791U (en) * | 2015-09-18 | 2016-01-06 | 大连华锐重工集团股份有限公司 | A kind of wind wheel locking framework of wind-driven generator |
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| CN107620679A (en) | 2018-01-23 |
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Address after: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region Patentee after: Jinfeng Technology Co.,Ltd. Address before: No.107 Shanghai Road, Urumqi Economic and Technological Development Zone, Urumqi City, Xinjiang Uygur Autonomous Region Patentee before: XINJIANG GOLDWIND SCIENCE & TECHNOLOGY Co.,Ltd. |