CN113833598B - Hub and main shaft connecting structure and connecting method in wind turbine generator system - Google Patents
Hub and main shaft connecting structure and connecting method in wind turbine generator system Download PDFInfo
- Publication number
- CN113833598B CN113833598B CN202110958604.7A CN202110958604A CN113833598B CN 113833598 B CN113833598 B CN 113833598B CN 202110958604 A CN202110958604 A CN 202110958604A CN 113833598 B CN113833598 B CN 113833598B
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- stud
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- flange
- hub
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000002093 peripheral effect Effects 0.000 abstract 2
- 239000004677 Nylon Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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
- F03D1/00—Wind motors with rotation axis substantially parallel to the air flow entering the rotor
- F03D1/06—Rotors
- F03D1/065—Rotors characterised by their construction elements
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D1/00—Couplings for rigidly connecting two coaxial shafts or other movable machine elements
- F16D1/06—Couplings for rigidly connecting two coaxial shafts or other movable machine elements for attachment of a member on a shaft or on a shaft-end
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
Abstract
The invention discloses a hub and main shaft connecting structure and a connecting method in a wind turbine generator system, wherein the connecting structure comprises a plurality of studs, two ends of each stud are respectively provided with a first thread part and a second thread part, the middle part of each stud is provided with a third thread part, the end face of a hub flange is provided with a plurality of through holes, each through hole is provided with a thread section and a unthreaded hole section, a fixture nut is arranged on the thread section of each through hole, an external thread matched with the thread section of the through hole is arranged on the outer peripheral surface of the fixture nut, an internal thread matched with the third thread part in the middle part of the stud is arranged on the inner peripheral surface of the fixture nut, one end of the stud with the first thread part is screwed into the through hole on the end face of the hub flange and is fixedly connected with the hub flange, and one end of the stud with the second thread part is screwed into a spindle flange stud hole arranged on the end face of the spindle flange and is fixedly connected with the spindle flange, so that the hub and the spindle are fixed. The invention has simple structure and convenient connection, reduces the length and the weight of the main shaft and reduces the processing cost of the main shaft.
Description
Technical Field
The invention belongs to the technical field of wind power equipment, and particularly relates to a hub and main shaft connecting structure and a connecting method in a wind turbine generator.
Background
The wind turbine generator system on the land in the wind turbine generator system basically adopts wind wheel integral hoisting, namely, firstly assembling the wind wheel 1 on the ground and then hoisting the wind wheel 1 to be connected with the engine room 2. One method of connecting the rotor 1 and nacelle 2 is: the connecting stud 2.2 of the hub 1.1 in the wind wheel 1 and the main shaft 2.1 in the engine room 2 are arranged in a blind hole of the hub 1.1, in order to meet the maintenance and replacement of the connecting stud 2.2, an axial space is reserved among the main shaft 2.1, the locking disc 2.3 and the bearing seat assembly 2.4, so that the length of a flange neck 2.5 is increased, the length and the weight of the main shaft 2.1 are increased, the production cost of the main shaft 2.1 is increased, and meanwhile, the bearing of a main transmission chain is deteriorated due to the increase of the cantilever length of the main shaft 2.1; the other method is as follows: by increasing the pitch diameter of the connecting stud 2.2, the connecting stud 2.2 is radially prevented from the bearing seat assembly 2.4, but the structural weight is increased.
Disclosure of Invention
In order to solve the problems in the prior art, according to one aspect of the present invention, there is provided a hub and spindle connection structure in a wind turbine generator system, including a hub flange and a spindle flange respectively disposed on a hub end surface and a spindle end surface, wherein an end surface on one side of the spindle flange is connected with the hub flange, and an end surface on the other side of the spindle flange is attached with a locking plate sleeved on a spindle, the hub and spindle connection structure in the wind turbine generator system is characterized in that the hub and spindle connection structure further includes a plurality of studs, two ends of each stud are respectively provided with a first threaded portion and a second threaded portion, a third threaded portion is disposed in the middle of each stud, the hub flange end surface is provided with a plurality of through holes, each through hole has a threaded section and a unthreaded hole section, the threaded section of each through hole faces the spindle, the threaded section of each through hole is provided with a fixture nut, an outer circumferential surface of the fixture nut is provided with external threads matched with the threaded section of the through holes, an inner circumferential surface of the fixture nut is provided with a plurality of internal threads matched with the third threaded portions of the stud, the end surface of the wind turbine generator system is provided with a plurality of stud holes, and the number of the spindle flange and the number of the stud holes is equal to the number of the stud holes and the stud holes corresponding to the number of the stud holes and the stud holes;
the first threaded part of the stud is screwed into the through hole of the flange end face of the hub, the threaded section of the through hole is screwed into the through hole, the unthreaded hole section of the through hole is screwed out, the third threaded part of the stud is screwed with the internal thread of the tool nut in the threaded section of the through hole, the first threaded part of the stud is screwed and connected with the first nut matched with the first threaded part of the stud, the second threaded part of the stud is screwed into the stud hole of the main shaft flange on the main shaft flange end face and is screwed out from the stud hole of the locking disc, and the second threaded part of the stud is screwed and connected with the second nut matched with the second threaded part of the stud.
Preferably, in the connection structure between the hub and the main shaft in the wind turbine generator system, the tool nut is a thin nut, the screwing length of the tool nut and the stud is short, and the height of the tool nut is smaller than the depth of the threaded section in the through hole.
Preferably, in the connection structure of the hub and the main shaft in the wind turbine generator, counter bores are respectively formed in two end faces of the stud.
Preferably, in the connection structure of the hub and the main shaft in the wind turbine generator, the tooling nut can be replaced by an expansion sleeve.
In order to solve the above problems in the prior art, in another aspect of the present invention, a connection method of a hub and a main shaft connection structure in a wind turbine generator is provided, where the method includes the following steps:
s1: sequentially screwing and fixing a plurality of tool nuts on the threaded section of the hub flange through hole;
s2: the method comprises the steps of sequentially screwing first threaded parts of a plurality of studs into a hub flange through hole, screwing a threaded section of the through hole out, screwing a third threaded part of each stud with an internal thread of a tool nut in the threaded section of the through hole, and screwing and connecting the first threaded parts of each stud through a first nut matched with the first threaded part of each stud;
s3: lifting the hub and the studs fixed on the hub flange as a whole, sequentially screwing the second threaded parts of the studs into stud holes of the spindle flange, screwing out the stud holes of the locking disc, and screwing and connecting the second threaded parts of each stud through a second nut matched with the second threaded parts of the studs.
The connecting structure of the hub and the main shaft in the wind turbine generator is simple and convenient, when the stud needs to be overhauled or replaced, the stud can be taken out from the side of the hub, the main shaft flange neck does not need to reserve overhauling or replacing space for the stud, the length and the weight of the main shaft are further reduced, the processing cost of the main shaft is reduced, and meanwhile, the tooling nut is matched with the stud by installing the tooling nut on the end face of the flange of the hub, so that the stability of the connection between the stud and the hub is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic view of a prior art wind turbine and nacelle assembly.
Fig. 2 is a schematic view of the assembly of a hub and a main shaft in the prior art.
Fig. 3 is an enlarged view of the portion II in fig. 2.
FIG. 4 is an assembly schematic diagram of a hub and main shaft connection structure in a wind turbine generator according to the present invention.
Fig. 5 is an enlarged view of the section I in fig. 4.
Fig. 6 is a schematic structural view of a through hole on the end face of a flange of a hub in a connection structure of the hub and a main shaft in a wind turbine generator system.
FIG. 7 is a schematic structural view of studs in a hub and spindle connection structure in a wind turbine of the present invention.
FIG. 8 is a schematic structural view of a tooling nut in a hub and spindle connection structure in a wind turbine of the present invention.
Reference numerals illustrate: 1-wind wheel, 1.1-hub, 2-cabin, 2.1-main shaft, 2.2-connecting stud, 2.3-locking disk, 2.4-bearing seat assembly, 2.5-flange neck, 10-hub flange, 10.1-smooth hole section, 10.2-thread section, 11-frock nut, 11.1-internal thread, 11.2-external thread, 11.3-mounting hole, 12-first nut, 20-main shaft flange, 21-second nut, 30-locking disk, 40-stud, 41-first screw thread portion, 42-second screw thread portion, 43-third screw thread portion, 50-bearing seat assembly.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below in connection with specific embodiments of the present invention. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The end faces of a hub and a main shaft in the wind generating set are respectively provided with a hub flange 10 and a main shaft flange 20, one side end face of the main shaft flange 20 is used for being connected with the hub flange 10, the other side end face of the main shaft flange 20 is attached with a locking disc 30 sleeved on the main shaft for locking the main shaft, and a bearing seat assembly 50 is sleeved on the main shaft for supporting the main shaft.
As shown in fig. 4, fig. 5, fig. 6, fig. 7 and fig. 8, the hub and spindle connection structure in the wind turbine generator system of the present invention comprises studs 40, tool nuts 11, first nuts 12 and second nuts 21, wherein a first threaded portion 41 and a second threaded portion 42 are respectively provided at both ends of each stud 40, a third threaded portion 43 is provided in the middle of each stud 40, a plurality of through holes are provided on the end surface of the hub flange 10, each through hole has a threaded section 10.2 and a unthreaded hole section 10.1, the threaded sections 10.2 of the through holes face the spindle, tool nuts 11 are installed in the threaded sections 10.2 of each through hole, external threads 11.2 matching with the threaded sections 10.2 of the through holes are provided on the outer circumferential surface of each tool nut 11, internal threads 11.2 matching with the third threaded portions 43 of the studs 40 are provided on the inner circumferential surface of each tool nut 11, a plurality of spindle flange stud holes are provided on the end surface of the spindle flange 20, the number of spindle flange stud holes is equal to the number of the through holes of the hub flange 40, and the number of the stud holes are in one-to-one stud holes are provided on the spindle flange 40 and the spindle flange holes are in one-to-one corresponding number to the stud holes 30.
The first threaded part 41 of the stud 40 is screwed into the through hole of the hub flange 10, screwed by the threaded section 10.2 of the through hole and screwed out by the unthreaded section 10.1 of the through hole, the third threaded part 43 of the stud 40 is screwed with the internal thread 11.1 of the tool nut 11 in the threaded section 10.2 of the through hole, the first threaded part 41 of the stud 40 is fixedly connected with the first nut 12 matched with the first threaded part, the second threaded part 42 of the stud 40 is screwed into a stud hole of a main shaft flange on the end face of the main shaft flange 20, and the second threaded part 42 of the stud 40 is fixedly connected with the second nut 21 matched with the second threaded part by the locking disc stud Kong Xuanchu.
In the hub and main shaft connecting structure in the wind turbine generator system, the tooling nut 11 is a low-strength nut, for example, is made of nylon, and the tooling nut 11 plays an auxiliary connection role before the stud 40 is pre-tightened, so that the stud 40 is stably fixed with the hub flange 10, and the tooling nut 11 is deformed or damaged when the stud 40 is pre-tightened, so that the pre-tightening and bearing of the stud 40 are not affected.
As a specific implementation mode, the tool nut 11 in the hub and main shaft connecting structure in the wind turbine generator system is a thin nut, the screwing length of the tool nut and the stud 40 is short, the stud 40 can be conveniently taken out later, and meanwhile, the height of the tool nut 11 is smaller than the depth of the threaded section 10.2 of the through hole on the hub flange 10, so that the hub flange 10 and the main shaft flange 20 are completely attached.
Preferably, in the hub and main shaft connecting structure in the wind turbine generator system, the end face of the tooling nut 11 is provided with the mounting hole 11.3, so that the tooling nut 11 is conveniently mounted on the threaded section 10.2 of the through hole of the hub flange 10.
Optionally, in the connection structure of the hub and the main shaft in the wind turbine generator system of the present invention, the tooling nut 11 may be replaced by an expansion sleeve, the outer circumference of which is connected to the threaded section 10.2 in the through hole of the hub flange 10, and the inner circumference of which is used to be connected to the third threaded portion 43 of the stud 40.
Preferably, in the hub and spindle connection structure of the wind turbine generator system of the present invention, counter bores are provided at both ends of the stud 40, and further, the first threaded portion 41 and the third threaded portion 43 of the stud 40 may be combined into one threaded portion.
The connection method of the hub and main shaft connection structure in the wind turbine generator system comprises the following steps:
s1: sequentially screwing and fixing a plurality of tool nuts 11 on the threaded section 10.2 of the through hole of the hub flange 10;
s2: the first threaded parts 41 of the studs 40 are screwed into the through hole of the hub flange 10 in sequence, screwed in by the threaded section 10.2 of the through hole and screwed out by the unthreaded hole section 10.1 of the through hole, the third threaded part 43 of each stud 40 is screwed with the internal thread 11.1 of the tool nut 11 in the threaded section 10.2 of the through hole, and the first threaded part 41 of each stud 40 is screwed and connected through the first nut 12 matched with the first threaded part;
s3: the hub and the studs 40 fixed on the hub flange 10 are integrally lifted, the second threaded portions 42 of the studs 40 are sequentially screwed into stud holes of the spindle flange, the studs are screwed out from the stud holes of the locking disc, and the second threaded portions 42 of the studs 40 are screwed and connected through the second nuts 21 matched with the second threaded portions.
Therefore, through the hub and main shaft connecting structure in the wind turbine generator system, when the stud is required to be overhauled or replaced, the stud can be taken out from the hub side, the main shaft flange neck does not need to reserve overhauling or replacing space for the stud, the length and the weight of the main shaft are further reduced, the processing cost of the main shaft is reduced, and meanwhile, the tooling nuts are matched with the stud through mounting the tooling nuts on the end face of the flange of the hub, so that the stability of connection between the stud and the hub is improved.
It should be noted that in this document, relational terms such as "first" and "second" are used solely to distinguish one entity from another entity without necessarily requiring or implying any actual such relationship or order between such entities. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Meanwhile, the term "connected" and the like as used herein should be construed broadly, and may be fixedly connected, detachably connected, directly connected, or indirectly connected through an intermediate member. In this context, "front", "rear", "left", "right", "upper", "lower", "inner", "outer", etc. are referred to the placed state shown in the drawings.
It should also be noted that the above embodiments are merely for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (4)
1. The hub and spindle connection structure in the wind turbine generator system comprises a hub flange and a spindle flange, wherein the hub flange and the spindle flange are respectively arranged on the hub end face and the spindle end face, the end face on one side of the spindle flange is connected with the hub flange, the end face on the other side of the spindle flange is attached with a locking disc sleeved on a spindle, the wind turbine generator system is characterized in that the hub and spindle connection structure in the wind turbine generator system further comprises a plurality of studs, two ends of each stud are respectively provided with a first thread part and a second thread part, the middle part of each stud is provided with a third thread part, the hub flange end face is provided with a plurality of through holes, each through hole is provided with a thread section and a unthreaded hole section, the thread section of each through hole faces towards the spindle, the thread section of each through hole is provided with a tool nut, the outer circumferential surface of the tool nut is provided with an inner thread matched with the thread section of the through hole, the spindle flange end face is provided with a plurality of spindle flange stud holes, the number of the spindle flange holes is equal to the number of the hub flange through the number of the studs, and the spindle flange holes are matched with the stud holes one by one, and the number of the stud holes are matched with the stud holes on the spindle flange holes;
the first threaded part of the stud is screwed into the through hole of the flange end face of the hub, the threaded section of the through hole is screwed into the through hole, the unthreaded hole section of the through hole is screwed out, the third threaded part of the stud is screwed with the internal thread of the tool nut in the threaded section of the through hole, the first threaded part of the stud is screwed and connected with the first nut matched with the first threaded part of the stud, the second threaded part of the stud is screwed into the stud hole of the main shaft flange on the main shaft flange end face and is screwed out from the stud hole of the locking disc, and the second threaded part of the stud is screwed and connected with the second nut matched with the second threaded part of the stud;
the tool nut is a thin nut, the screwing length of the tool nut and the stud is short, the height of the tool nut is smaller than the depth of the threaded section of the through hole, the tool nut plays an auxiliary connection role before the stud is pre-tightened, the stud is stably fixed with the hub flange, and the tool nut is deformed or damaged when the stud is pre-tightened, so that the stud pre-tightening and bearing are not affected.
2. The wind turbine generator system according to claim 1, wherein counter bores are respectively formed in two end surfaces of the stud.
3. The wind turbine generator system of claim 1, wherein the tooling nut is replaceable with an expansion sleeve.
4. A method for connecting a hub and a main shaft connection structure in a wind turbine according to any one of claims 1 to 3, said method comprising the steps of:
s1: sequentially screwing and fixing a plurality of tool nuts on the threaded section of the hub flange through hole;
s2: the method comprises the steps of sequentially screwing first threaded parts of a plurality of studs into a hub flange through hole, screwing a threaded section of the through hole out, screwing a third threaded part of each stud with an internal thread of a tool nut in the threaded section of the through hole, and screwing and connecting the first threaded parts of each stud through a first nut matched with the first threaded part of each stud;
s3: lifting the hub and the studs fixed on the hub flange as a whole, sequentially screwing the second threaded parts of the studs into stud holes of the spindle flange, screwing out the stud holes of the locking disc, and screwing and connecting the second threaded parts of each stud through a second nut matched with the second threaded parts of the studs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110958604.7A CN113833598B (en) | 2021-08-20 | 2021-08-20 | Hub and main shaft connecting structure and connecting method in wind turbine generator system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110958604.7A CN113833598B (en) | 2021-08-20 | 2021-08-20 | Hub and main shaft connecting structure and connecting method in wind turbine generator system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113833598A CN113833598A (en) | 2021-12-24 |
| CN113833598B true CN113833598B (en) | 2024-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110958604.7A Active CN113833598B (en) | 2021-08-20 | 2021-08-20 | Hub and main shaft connecting structure and connecting method in wind turbine generator system |
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| CN204299802U (en) * | 2014-12-09 | 2015-04-29 | 江苏新誉重工科技有限公司 | Hub of wind power generator and main shaft jockey |
| CN204984744U (en) * | 2015-09-01 | 2016-01-20 | 太原重工股份有限公司 | Novel wind -powered electricity generation wheel hub owner shaft connecting structure |
| CN105305708A (en) * | 2015-10-13 | 2016-02-03 | 北京金风科创风电设备有限公司 | Motor, wind generating set and rigidity adjusting device |
| CN106438192A (en) * | 2015-08-07 | 2017-02-22 | 中材科技风电叶片股份有限公司 | Sectional type wind power generation blade connecting structure and method |
| CN206608271U (en) * | 2017-03-17 | 2017-11-03 | 内蒙古机电职业技术学院 | The attachment means of wind wheel in wind-driven generator |
| CN211573700U (en) * | 2020-02-18 | 2020-09-25 | 河北泽瑞新能源科技有限公司 | Wind-powered electricity generation blade bolt location lag |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102008036230B4 (en) * | 2008-08-02 | 2010-07-01 | Nordex Energy Gmbh | Method for mounting a rotor hub on a rotor shaft of a wind turbine and wind energy plant |
| KR101194571B1 (en) * | 2010-08-27 | 2012-10-25 | 삼성중공업 주식회사 | Wind power generator and ventilation structure of a wind power generator |
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2021
- 2021-08-20 CN CN202110958604.7A patent/CN113833598B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204299802U (en) * | 2014-12-09 | 2015-04-29 | 江苏新誉重工科技有限公司 | Hub of wind power generator and main shaft jockey |
| CN106438192A (en) * | 2015-08-07 | 2017-02-22 | 中材科技风电叶片股份有限公司 | Sectional type wind power generation blade connecting structure and method |
| CN204984744U (en) * | 2015-09-01 | 2016-01-20 | 太原重工股份有限公司 | Novel wind -powered electricity generation wheel hub owner shaft connecting structure |
| CN105305708A (en) * | 2015-10-13 | 2016-02-03 | 北京金风科创风电设备有限公司 | Motor, wind generating set and rigidity adjusting device |
| CN206608271U (en) * | 2017-03-17 | 2017-11-03 | 内蒙古机电职业技术学院 | The attachment means of wind wheel in wind-driven generator |
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| CN113833598A (en) | 2021-12-24 |
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