CN116164022B - Wind-powered electricity generation blade root bolt housing and blade root connection structure - Google Patents
Wind-powered electricity generation blade root bolt housing and blade root connection structure Download PDFInfo
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- CN116164022B CN116164022B CN202310441671.0A CN202310441671A CN116164022B CN 116164022 B CN116164022 B CN 116164022B CN 202310441671 A CN202310441671 A CN 202310441671A CN 116164022 B CN116164022 B CN 116164022B
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- blade root
- bolt
- sleeve
- wind
- screw sleeve
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- 230000005611 electricity Effects 0.000 title claims description 3
- 238000005266 casting Methods 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 210000001503 joint Anatomy 0.000 claims description 2
- 241001391944 Commicarpus scandens Species 0.000 abstract description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 4
- 239000011796 hollow space material Substances 0.000 description 4
- 238000010248 power generation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
Images
Classifications
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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
- F03D13/00—Assembly, mounting or commissioning of wind motors; Arrangements specially adapted for transporting wind motor components
- F03D13/10—Assembly of wind motors; Arrangements for erecting wind motors
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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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
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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
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B41/00—Measures against loss of bolts, nuts, or pins; Measures against unauthorised operation of bolts, nuts or pins
- F16B41/002—Measures against loss of bolts, nuts or pins
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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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Wind Motors (AREA)
Abstract
The invention relates to the technical field of wind power blades, in particular to a wind power blade root bolt sleeve and a blade root connecting structure. According to the invention, through the arrangement of the bolt sleeve structure, the load and the power of the blade under the pitch circle of the blade root with the same size are improved, meanwhile, the problem that the blade root bolt is easy to break is effectively solved, and the service life of the blade root bolt is prolonged.
Description
Technical Field
The invention relates to the technical field of wind power blades, in particular to a wind power blade root bolt sleeve and a blade root connecting structure.
Background
The existing wind power blade is connected with the wind power generator hub by embedding a bolt sleeve at the blade root of the wind power blade and then connecting the wind power blade with the wind power generator hub through bolts, however, in actual operation, the problem that the blade root bolts are easy to break is solved;
in the prior art, as disclosed in chinese patent application publication No. CN107269461a, in 2017, 8 and 10, a wind power blade root structure is disclosed, in which an inner insert is disposed in a bolt sleeve and is inserted into one end facing a blade tip, and by this arrangement, the contact area between the bolt sleeve and the blade root is increased, so as to improve the connection structure strength of the bolt sleeve;
however, when the inventor implements the above-mentioned scheme, the above-mentioned inner insert structure extending toward the blade tip direction can improve the fixing strength of the bolt sleeve, but has limited effect on reducing the risk of breaking the bolt, and cannot achieve the purpose of prolonging the service life of the blade root bolt.
Disclosure of Invention
In view of at least one of the above technical problems, the invention provides a wind power blade root bolt sleeve and a blade root connecting structure, and the service life of a blade root bolt is prolonged by adopting the improvement of the bolt sleeve structure.
According to a first aspect of the present invention there is provided a wind turbine blade root bolt sleeve comprising: including main swivel nut and vice swivel nut, main swivel nut includes protruding section and the pre-buried section of pre-buried in the blade root inside in the blade root tip, vice swivel nut with protruding section parallel connection, have the first cavity space of axial setting on the main swivel nut, have the second cavity space of axial setting on the vice swivel nut, all have the screw thread in first cavity space and the second cavity, the screw thread is used for installing the blade root on turbine wheel hub with the help of the bolt.
Further, the ends of the main screw sleeve and the auxiliary screw sleeve are arranged in a flush mode.
Further, the outer end of the secondary screw sleeve is flush with the outer end of the protruding section.
Further, the length of the secondary screw sleeve is not greater than the length of the protruding section.
Further, the main screw sleeve and the auxiliary screw sleeve are integrally formed.
Further, the inner diameter of the auxiliary screw sleeve is smaller than that of the main screw sleeve, and a transition surface is arranged between the main screw sleeve and the auxiliary screw sleeve.
Further, the surface of the embedded section is provided with a plurality of annular grooves or protrusions which are arranged at intervals.
Further, the bolt housing is a metal piece.
Further, the bolt housing is formed by casting or cutting.
According to a second aspect of the present invention, there is also provided a wind power blade root connection structure, including a wind power blade root bolt sleeve according to any one of the first aspect, wherein an embedded section in the bolt sleeve is embedded in a blade root, a protruding section and a second screw sleeve protrude from an end face of the blade root, and a central connecting line of the protruding section and the second screw sleeve points to a blade root center;
the blade root flange is annular, a hole site corresponding to the section of the bolt sleeve is formed in the flange surface, and the blade root flange is sleeved on the bolt sleeve and is attached to the end face of the blade root part;
the turbine blade further comprises a turbine hub in butt joint with the blade root flange, a main bolt in threaded connection with the main screw sleeve and a secondary bolt in threaded connection with the secondary screw sleeve.
The beneficial effects of the invention are as follows: according to the invention, the bolt sleeve is arranged in the form of the main screw sleeve and the auxiliary screw sleeve, so that the rigidity and the strength of the connection part are enhanced when the blade root part is connected, and the bolt sleeve has the same embedded part as the prior art, but a row of auxiliary screw sleeves are added, so that the load and the power generation power born by the blade under the pitch circle of the blade root with the same size can be improved, the problem that the blade root bolt is easy to break is effectively solved, and the service life of the blade root bolt is prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings may be obtained according to the drawings without inventive effort to those skilled in the art.
FIG. 1 is a schematic view of a bolt sleeve for a blade root of a wind turbine blade in accordance with an embodiment of the present invention;
FIG. 2 is a schematic axial cross-sectional view of a bolt sleeve for a blade root of an electrical blade in accordance with an embodiment of the present invention;
FIG. 3 is a front view of a bolt sleeve for a blade root of a blade in accordance with an embodiment of the present invention;
FIG. 4 is a partial front view of a blade root connection configuration for a wind turbine blade in accordance with an embodiment of the present invention;
fig. 5 is a schematic view of a partial cross-sectional view of a blade root connection structure for a wind turbine blade in accordance with an embodiment of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The bolt sleeve for the blade root of the wind power blade as shown in fig. 1 to 5 comprises a main screw sleeve 11 and an auxiliary screw sleeve 12, wherein the main screw sleeve 11 comprises a convex section 11a protruding from the end part of the blade root and a pre-embedded section 11b pre-embedded in the blade root, the auxiliary screw sleeve 12 is connected with the convex section 11a in parallel and in parallel, a first hollow space 11c axially arranged is formed in the main screw sleeve 11, a second hollow space 12a axially arranged is formed in the auxiliary screw sleeve 12, and threads are formed in the first hollow space 11c and the second hollow space and used for installing the blade root on the turbine hub 4 by means of bolts. In the embodiment of the invention, the main screw sleeve 11 has a similar structure to the existing blade root screw sleeve, and the difference is that the embedded section 11b of the main screw sleeve 11 is embedded in the blade root, and the convex section 11a and the auxiliary screw sleeve 12 are protruded out of the end part of the blade root, so that the auxiliary screw sleeve 12 and the convex section 11a can play a role in resisting shearing when being connected with the turbine hub 4 through the structural arrangement, and compared with the prior art, the structural form increases a row of auxiliary screw sleeves 12 under the condition of not increasing the volume of the blade root 2, thereby improving the strength of the connection structure with the turbine hub 4.
The embodiment of the invention also discloses a wind power blade root connecting structure, which is shown in fig. 5, and comprises the wind power blade root bolt sleeve 1, wherein an embedded section 11b in the bolt sleeve 1 is embedded in a blade root 2, a convex section 11a and a second screw sleeve are protruded out of the end part of the blade root 2, and the central connecting line of the convex section 11a and the second screw sleeve points to the center of a blade root; the novel blade root structure further comprises a blade root flange 3, the blade root flange 3 is annular, a hole site corresponding to the section of the bolt sleeve 1 is formed in the flange surface, and the blade root flange 3 is sleeved on the bolt sleeve 1 and is attached to the end face of the blade root; also included are a turbine hub 4 that interfaces with the root flange 3, a primary bolt 6 that is threaded with a primary barrel 11, and a secondary bolt 5 that is threaded with a secondary barrel 12. When the connection is specifically carried out, the blade root bolt sleeve 1 is pre-buried in the blade root part 2, when the connection is specifically carried out, the bolt sleeve 1 can be positioned by adopting a tool with the same structure as the blade root flange 3, and the tool is taken down after the fixation is completed; when the turbine hub is specifically installed, firstly, the blade root flange 3 is sleeved on the bolt sleeve 1, the blade root flange 3 is attached to the blade root end, then, the installation flange of the turbine hub 4 corresponds to the blade root flange 3, and the connection between the blade and the turbine hub 4 is realized by the mode that the main bolts 6 are in the main screw sleeve 11 and the auxiliary bolts 5 are in the auxiliary screw sleeve 12 in a screwed manner.
In the above embodiment, the bolt sleeve 1 is set into the form of the main turnbuckle 11 and the auxiliary turnbuckle 12, so that the rigidity and strength of the connection position of the blade root 2 are enhanced when the blade root 2 is connected, and the bolt sleeve 1 has the same embedded position as the prior art, but a row of auxiliary turnbuckles 12 are added, so that the load and the power generation born by the blade under the same-size blade root pitch circle can be improved, the problem that the blade root bolt is easy to break is effectively solved, and the service life of the blade root bolt is prolonged.
In some embodiments of the present invention, in order to improve the structural strength of the bolt sleeve 1, the bolt sleeve 1 is made of metal, and when the bolt sleeve 1 is specifically formed, a forming process of the bolt sleeve 1 can be implemented by adopting a casting or cutting mode; in addition, in the embodiment of the invention, the main screw sleeve 11 and the auxiliary screw sleeve 12 are formed in an integral forming manner, and through the structural arrangement, the overall structural strength of the bolt sleeve 1 can be improved;
as shown in fig. 2 and 3 in particular, the inner diameter of the secondary barrel 12 is smaller than the inner diameter of the primary barrel 11, with a transition surface 12b between the primary barrel 11 and the secondary barrel 12. When carrying out the laying of bolt housing 1 specifically, main swivel nut 11 sets up at the outer lane, vice swivel nut 12 sets up at the inner circle, through the setting of this kind of mode for the great main bolt 6 of diameter plays main connected action, realizes the connection of turbine wheel hub 4 and blade root portion 2, and vice bolt 5 can strengthen the connection structural strength between turbine wheel hub 4 and the blade root, and the structural reinforcement of vice bolt 5 on the one hand is embodied in can realizing the reliable location of blade root flange 3, has increased the area of contact with blade root flange 3, has improved blade root flange 3's shear resistance, on the other hand has still strengthened the connection structural strength between blade root flange 3 and the turbine wheel hub 4.
With continued reference to fig. 1 and 2, in an embodiment of the present invention, the main barrel 11 is disposed flush with the end of the auxiliary barrel 12. The end here refers to the end of the main screw sleeve 11 at which the protruding section 11a is located, i.e., the outer end of the sub screw sleeve 12 is flush with the outer end of the protruding section 11 a. By this arrangement, the contact area between the end face of the bolt housing 1 and the turbine hub 4 can be increased, and the reliability in connection can be further improved.
In some embodiments of the invention, the length of the secondary sleeve 12 is no greater than the length of the boss section 11 a. As shown in fig. 5, by this arrangement, the end of the secondary screw sleeve 12 facing the blade root direction may be attached to the blade root 2, and in some embodiments of the present invention, a positioning groove structure corresponding to the secondary screw sleeve 12 may be further provided on the end surface of the blade root 2, so as to further increase the fixation stability of the screw sleeve.
In addition, as shown in fig. 1 and 2, in order to enhance the pre-buried structural strength of the main screw sleeve 11, the surface of the pre-buried section 11b has a plurality of annular grooves or protrusions provided at intervals. By this arrangement, the connection area with the inside of the blade root is increased, and the tensile strength of the main barrel 11 is further improved.
It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a wind-powered electricity generation blade root bolt sleeve, its characterized in that includes main swivel nut and vice swivel nut, main swivel nut includes protruding section and the pre-buried section of pre-buried in the blade root inside that is protruded in the blade root tip, vice swivel nut with protruding section parallel side by side is connected, just the one end of vice swivel nut towards blade root direction is laminated with the blade root, have the first cavity space of axial setting on the main swivel nut, have the second cavity space of axial setting on the vice swivel nut, all have the screw thread in first cavity space and the second cavity space, screw thread in first cavity space and the second cavity space is all used for installing the blade root on turbine wheel hub with the help of the bolt; the main screw sleeve and the auxiliary screw sleeve are integrally formed, the inner diameter of the auxiliary screw sleeve is smaller than that of the main screw sleeve, and a transition surface is arranged between the main screw sleeve and the auxiliary screw sleeve.
2. The wind-powered blade root bolt bushing of claim 1, wherein the primary screw bushing is disposed flush with an end of the secondary screw bushing.
3. The wind-powered blade root bolt bushing of claim 1, wherein an outer end of said secondary swivel nut is flush with an outer end of said boss section.
4. The wind-powered blade root bolt bushing of claim 1, wherein a length of said secondary screw bushing is no greater than a length of said boss section.
5. The wind-powered blade root bolt sleeve of claim 1, wherein the surface of the pre-buried section has a plurality of spaced annular grooves or protrusions.
6. The wind blade root bolt housing of claim 1, wherein the bolt housing is a metal piece.
7. The wind-powered blade root bolt housing of claim 6, wherein the bolt housing is formed by casting or cutting.
8. A wind power blade root connection structure, characterized by comprising a wind power blade root bolt sleeve according to any one of claims 1 to 7, wherein an embedded section in the bolt sleeve is embedded in a blade root, a convex section and a second screw sleeve are protruded out of the end face of the blade root, and a central connecting line of the convex section and the second screw sleeve points to the center of a blade root;
the blade root flange is annular, a hole site corresponding to the section of the bolt sleeve is formed in the flange surface, and the blade root flange is sleeved on the bolt sleeve and is attached to the end face of the blade root part;
the turbine blade further comprises a turbine hub in butt joint with the blade root flange, a main bolt in threaded connection with the main screw sleeve and a secondary bolt in threaded connection with the secondary screw sleeve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310441671.0A CN116164022B (en) | 2023-04-23 | 2023-04-23 | Wind-powered electricity generation blade root bolt housing and blade root connection structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310441671.0A CN116164022B (en) | 2023-04-23 | 2023-04-23 | Wind-powered electricity generation blade root bolt housing and blade root connection structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116164022A CN116164022A (en) | 2023-05-26 |
| CN116164022B true CN116164022B (en) | 2023-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310441671.0A Active CN116164022B (en) | 2023-04-23 | 2023-04-23 | Wind-powered electricity generation blade root bolt housing and blade root connection structure |
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| CN (1) | CN116164022B (en) |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2389646C2 (en) * | 2008-03-11 | 2010-05-20 | Геннадий Мстиславич Кормильченко | Device to secure variable-pitch propeller screw |
| GB0822681D0 (en) * | 2008-12-12 | 2009-01-21 | Aviat Entpr Ltd | Rotor blades |
| GB201402830D0 (en) * | 2014-02-18 | 2014-04-02 | Lm Wp Patent Holding As | Wind turbine blade brushing system |
| CN104554307A (en) * | 2014-12-18 | 2015-04-29 | 南车青岛四方机车车辆股份有限公司 | Motor train unit body and inner windshield mounting structure thereof |
| CN107366673A (en) * | 2016-05-11 | 2017-11-21 | 中材科技风电叶片股份有限公司 | Bolt sleeve, blade root built-in fitting and the wind electricity blade production method of wind electricity blade |
| CN206106165U (en) * | 2016-09-29 | 2017-04-19 | 上海华宜风电模具有限公司 | Wind power blade mould root flange device |
| CN206254371U (en) * | 2016-11-02 | 2017-06-16 | 三一重型能源装备有限公司 | A kind of pre-embedded bolt covers locating piece and fan blade mould structure |
| CN108301986B (en) * | 2017-12-18 | 2019-11-22 | 洛阳双瑞风电叶片有限公司 | Platform fixing device is used in a kind of test of wind electricity blade |
| US11353002B2 (en) * | 2019-01-16 | 2022-06-07 | Roller Bearing Company Of America, Inc. | Multi segment wind turbine blade joint bushing |
| WO2021069399A1 (en) * | 2019-10-07 | 2021-04-15 | Vestas Offshore Wind A/S | An improved method for the manufacture of wind turbine blades |
| CN213235745U (en) * | 2020-07-30 | 2021-05-18 | 国电龙源江永风力发电有限公司 | Wind generating set blade root connecting bolt sleeve with load balancing function |
| CN113733607B (en) * | 2021-09-24 | 2022-09-09 | 吉林重通成飞新材料股份公司 | Preparation method of wind power blade |
| CN216465620U (en) * | 2021-11-19 | 2022-05-10 | 中材科技(萍乡)风电叶片有限公司 | Anti-deformation technology for blade root of wind power blade |
| CN218347490U (en) * | 2022-10-31 | 2023-01-20 | 江苏金风科技有限公司 | Blade and wind generating set |
| CN115992792A (en) * | 2023-02-28 | 2023-04-21 | 株洲时代新材料科技股份有限公司 | Wind power blade root connection structure and design method thereof |
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- 2023-04-23 CN CN202310441671.0A patent/CN116164022B/en active Active
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