CA2673709A1 - Wind power turbine - Google Patents

Wind power turbine Download PDF

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Publication number
CA2673709A1
CA2673709A1 CA002673709A CA2673709A CA2673709A1 CA 2673709 A1 CA2673709 A1 CA 2673709A1 CA 002673709 A CA002673709 A CA 002673709A CA 2673709 A CA2673709 A CA 2673709A CA 2673709 A1 CA2673709 A1 CA 2673709A1
Authority
CA
Canada
Prior art keywords
wind power
wedge
power turbine
locking
stator
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.)
Abandoned
Application number
CA002673709A
Other languages
French (fr)
Inventor
Otto Pabst
Matteo Casazza
Emmanuele Gelmini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Willic SARL
Original Assignee
Rolic Invest SARL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rolic Invest SARL filed Critical Rolic Invest SARL
Publication of CA2673709A1 publication Critical patent/CA2673709A1/en
Abandoned legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/18—Structural association of electric generators with mechanical driving motors, e.g. with turbines
    • H02K7/1807—Rotary generators
    • H02K7/1823—Rotary generators structurally associated with turbines or similar engines
    • H02K7/183—Rotary generators structurally associated with turbines or similar engines wherein the turbine is a wind turbine
    • H02K7/1838—Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine
    • 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
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • 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
    • F03D80/00—Details, components or accessories not provided for in groups F03D1/00 - F03D17/00
    • F03D80/50—Maintenance or repair
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2220/00—Application
    • F05B2220/70—Application in combination with
    • F05B2220/706—Application in combination with an electrical generator
    • F05B2220/7066—Application in combination with an electrical generator via a direct connection, i.e. a gearless transmission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/30—Retaining components in desired mutual position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/30—Retaining components in desired mutual position
    • F05B2260/31—Locking rotor in position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/10—Application independent of particular apparatuses related to size
    • F16C2300/14—Large applications, e.g. bearings having an inner diameter exceeding 500 mm
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2360/00—Engines or pumps
    • F16C2360/31—Wind motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
    • H02K15/0006—Disassembling, repairing or modifying dynamo-electric machines
    • 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

A wind power turbine has a fixed assembly; a mobile assembly fitted to the fixed assembly to rotate about an axis with respect to the fixed assembly; and a locking device for making the mobile assembly and the fixed assembly integral with each other; the locking device has at least one groove formed on the fixed assembly or the mobile assembly and coaxial with the axis, and angular locking means that can be activated to pressure engage the groove.

Description

WIND POWER TURBINE

The present invention relates to a wind power turbine.

More specifically, the present invention relates to a wind power turbine of the type comprising a nacelle normally mounted on top of a pylon; an electric generator housed in the nacelle and comprising a rotor and a stator; and a blade assembly fitted in rotary manner to the nacelle and comprising a hub, and a shaft fitted directly to the hub and rotor and supported by the stator with the interposition of bearing means.

In so-called direct-coupled wind power turbines of the above type, i.e. with no reducer between the blade assembly and the rotor, one of the components requiring most frequent maintenance and/or replacement is the bearing means, which normally comprise one or more relatively large-diameter bearings interposed between the blade assembly shaft and the stator of the electric generator.

To simplify maintenance and/or replacement, wind power turbines of the above type have been devised, in which the bearings can be worked on, after disconnecting the shaft from the blade assembly hub, from inside the nacelle, without having to detach and lower the blade assembly to the ground.

In known wind power turbines of this type, the shaft and bearings can obviously only be disconnected after angularly locking the blade assembly with respect to the stator.

In known wind power turbines of the above type, angularly locking the blade assembly normally involves first positioning the blade assembly angularly with respect to the stator, in that locking can normally only be achieved by selectively setting the blade assembly to a given number of angular positions with respect to the nacelle.

Given the size and the sensitivity to external agents of the blade assemblies employed, setting the blade assembly to given angular positions with respect to the nacelle is rarely fast or easy.

It is an object of the present invention to provide a wind power turbine of the above type, designed to substantially eliminate the aforementioned drawbacks.

More specifically, it is an object of the present invention to provide a wind power turbine of the above type, in which the blade assembly can be locked with respect to the stator of the electric generator regardless of the angular position of the blade assembly with respect to the stator.

According to the present invention, there is provided a wind power turbine as claimed in Claim 1 and preferably any one of the following Claims depending directly or indirectly on Claim 1.

A number of non-limiting embodiments of the present invention will be described by way of example with reference to the accompanying drawings, in which:

Figure 1 shows a side view, with parts removed for clarity, of a first embodiment of the wind power turbine according to the present invention;

Figure 2 shows a larger-scale, partial axial section of a detail in Figure 1;

Figure 3 shows a larger-scale, partly exploded half axial section of a detail in Figure 2;

Figure 4 shows an exploded view of the Figure 3 detail;

Figure 5 shows a schematic view in perspective of a detail in Figures 3 and 4;

Figure 6 shows a larger-scale half axial section of a detail of a second embodiment of the wind power turbine according to the present invention;

Figure 7 shows a larger-scale half axial section of a detail of a third embodiment of the wind power turbine according to the present invention;

Figure 8 shows a half axial section of a variation of Figure 7.

Number 1 in Figure 1 indicates as a whole a wind power turbine comprising a nacelle 2 mounted on top of a pylon 3 and supporting for rotation a blade assembly 4 positioned with its axis 5 substantially horizontal.

As shown in Figure 2, blade assembly 4 comprises a number of blades 6 substantially radial with respect to axis 5 and supported by a hub 7, which is shaped at the front to form an ogive 8, and is tapered at the rear and connected by a face coupling 9 to the outer end of a tubular shaft 10 coaxial with axis 5.

The end of nacelle 2 facing blade assembly 4 and engaged by shaft 10 is defined by an electric generator 11 comprising a tubular outer stator 12, which is coaxial with axis 5, has outer axial cooling fins 13, and terminates, on the side facing blade assembly 4, with an inner annular flange 14 having a substantially trapezoidal cross section tapering outwards and with its major base facing axis 5. Electric generator 11 also comprises a tubular rotor 15, which is coaxial with axis 5 and stator 12, is located inside stator 12, is connected angularly to an inner end of shaft 10 by a connecting device 16, and comprises an inner cylindrical wall 17 defining, inside nacelle 2, a chamber 18 accessible from the outside, in a manner not shown, to permit maintenance and/or replacement work inside chamber 18, as described in detail below.

As shown more clearly in Figures 3 and 4, shaft 10 has an inner annular flange 19 on the end facing hub 7, and an outer annular flange 20 at the opposite end; and hub 7 has, on the side facing shaft 10, an inner annular flange 21 facing flange 19 of shaft 10, and a truncated-cone-shaped outer surface 22 that forms a roughly 450 angle with axis 5, tapers towards shaft 10, and is located outwards of flange 21.

Flanges 19 and 21 form part of face coupling 9, which also comprises an annular plate 23 interposed between flanges 19 and 21; and a set of screws 24, each of which is fitted inside a respective axial through hole in shaft 10, and a respective through hole in annular plate 23, and engages a respective threaded hole 5 25 in flange 21.

Annular plate 23 has an annular outer portion, which projects outwards of a cylindrical outer surface of shaft 10, is shimmed on the side facing flange 20 to form a locator for annular plate 23 on shaft 10, and defines, together with the outer surface of shaft 10 and flange 20, a cylindrical chamber for housing and locking to shaft 10 the inner ring of a conical roller bearing 26 interposed between shaft 10 and stator 12, and comprising an outer ring locked to the inner periphery of flange 14 of stator 12 as described below.

As shown in Figures 3 and 4, flange 14 is bounded, on the side facing shaft 10, by a cylindrical surface, from which projects inwards an annular rib 27 defining an annular outer lateral supporting shoulder for the outer ring of bearing 26. On the side facing inner chamber 18, the outer ring of bearing 26 is shouldered by an annular body 28, which is locked axially to flange 14 by a set of studs 29, each of which engages a respective threaded axial hole in rib 27, a respective axial through hole in annular body 28, a respective axial through hole in the outer ring of bearing 26, and a respective nut 30 for locking annular body 28 to the outer ring of bearing 26.
To the front of rib 27, flange 14 has a conical surface 31 tapering towards inner chamber 18 and facing truncated-cone-shaped surface 22 of hub 7. Each generating line of truncated-cone-shaped surface 31 is parallel to a corresponding generating line of truncated-cone-shaped surface 22, and forms a roughly 451 angle with axis 5.

An annular flange projects inwards from the end of wall 17 of rotor 15, has a substantially T-shaped cross section, faces an axially inner annular surface of flange 14, and comprises, on its inner periphery, a ring 32 facing the outer periphery of flange 20 of shaft 10.
Ring 32 is bounded, on the side facing flange 20, by a truncated-cone-shaped surface 33 defining, with a substantially cylindrical lateral surface of flange 20, an annular groove 34 with a substantially triangular cross section open on the side facing chamber 18. An annular portion of ring 32 engages an annular cavity 35 formed in flange 14. More specifically, ring 32 is bounded, on the side facing wall 17 of rotor 15, by a truncated-cone-shaped surface 36 tapering towards blades 6 and facing a like truncated-cone-shaped surface 37 of annular cavity 35. Each generating line of truncated-cone-shaped surface 36 is parallel to a corresponding generating line of truncated-cone-shaped surface 37, and forms a roughly 45 angle with axis 5.

Flange 20 of shaft 10 and ring 32 are coplanar, and are connected integrally by connecting device 16, which is a press-in connecting device and comprises an annular plate 38 positioned contacting an annular axial-end surface of flange 20. The outer periphery of annular plate 38 projects radially outwards of flange 20 and is fitted with an axial annular rib 39 having a substantially trapezoidal cross section, and which pressure engages annular groove 34 to lock flange 20 and ring 32 to each other. Annular rib 39 is retained inside annular groove 34 by a set of screws 40, each of which extends inside a respective axial through hole formed through annular plate 38 and annular rib 39, and engages a respective threaded hole 41 formed axially in ring 32.

An annular groove 42 is formed in a front annular surface of the annular whole defined by flange 20 and ring 32 connected integrally to each other by connecting device 16, is positioned facing annular body 28, and communicates with chamber 18 via a number of axial holes 43, each of which is formed through flange 20 and annular plate 38, is coaxial with a respective screw 29, and allows an operator inside chamber 18 to work on screw 29.

Wind power turbine 1 comprises a locking device 44 by which, when necessary, to lock its mobile assembly, comprising blade assembly 4, shaft 10 and rotor 15, to its fixed assembly comprising nacelle 2 and stator 12, regardless of the angular position of the mobile assembly with respect to the fixed assembly.

Locking device 44 comprises two annular, trapezoidal-cross-section grooves 45, 46 coaxial with axis 5 and formed in truncated-cone-shaped surface 31 and truncated-cone-shaped surface 37 respectively.
Locking device 44 also comprises two rings of screws 47 and 48, each of which is inclined with respect to axis 5, is perpendicular to respective truncated-cone-shaped surface 31, 37, and has a truncated-cone-shaped end portion 49. Each screw 47 engages a respective threaded through hole 50 formed through hub 7 and truncated-cone-shaped surface 22, and is substantially perpendicular to truncated-cone-shaped surface 22; and each screw 48 engages a respective threaded through hole 51 formed through ring 32 and truncated-cone-shaped surface 36 from annular groove 42, and is substantially perpendicular to truncated-cone-shaped surface 36.

Locking device 44 also comprises a set of inclined holes 52, each of which is formed in flange 20 of shaft 10, coaxially with respective screw 48, and allows an operator inside chamber 18 to work on screw 48. The length of each screw 47, 48 is such that, before screw 47, 48 is tightened down completely, the respective truncated-cone-shaped end portion 49 projects outwards of respective threaded hole 50, 51 and pressure engages relative annular groove 45, 46.

In actual use, to carry out maintenance work on and/or change bearing 26, an operator inside chamber 18 first tightens screws 48, so that truncated-cone-shaped portions 49 of the screws pressure engage groove 46 to lock rotor 15 angularly to stator 12. Screws 47 are then tightened so that respective truncated-cone-shaped portions 49 pressure engage groove 45 to safely lock blade assembly 4 both angularly and axially to stator 12 and therefore to nacelle 2.

At this point, the operator removes screws 24 and 40 and nuts 30 to detach shaft 10 and bearing 26 as a whole from hub 7. If bearing 26 is cold-fitted to shaft 10, the operator first removes screws 40 and screws 24, to withdraw shaft 10 from bearing 26, and then removes nuts 30 to withdraw annular body 28 and, therefore, bearing 26 from flange 14 of stator 12. If bearing 26 is hot-fitted to shaft 10, the operator first removes screws 24 and nuts 30 to withdraw shaft 10 and bearing 26 as a whole from flange 14 of stator 12, and bearing 26 is removed later from shaft 10.

Screws 47 therefore provide not only for locking blade assembly 4 angularly to stator 12 in any relative angular position, but also for making blade assembly 4 and stator 12 integral with each other, so shaft 10 and bearing 26 can be removed from the inside, without having to dismantle blade assembly 4.

Figure 6 shows a second embodiment of wind power turbine 1, the component parts of which are indicated, where possible, using the same reference numbers as for the corresponding parts of the Figure 1-5 embodiment.
The Figure 6 variation relates to a further embodiment of part of locking device 44, and more specifically to the part of locking device 44 for locking blade assembly 4 angularly to stator 12.

The blade assembly is locked angularly to the stator by forming, in flange 14 of stator 12, a number 5 of groove sectors 53 coaxial with axis 5, equally spaced about axis 5, and facing hub 7. An annular groove 54 with a V-shaped cross section is formed in hub 7, facing sectors 53. Each sector 53 houses a wedge 55 comprising an end portion 56, which has a triangular cross section 10 and pressure engages groove 54 to safely connect blade assembly 4 to stator 12 and, therefore, to nacelle 2 both angularly and axially.

Accordingly, each wedge 55 has a substantially central through hole 57 parallel to axis 5; and a threaded hole 58 extending radially with respect to axis 5 from an end surface 59 of relative wedge 55 facing an outer end surface 60 of relative sector 53.

During assembly, each wedge 55 is fitted inside relative sector 53, so relative through hole 57 is coaxial with a relative threaded through hole 61 formed in annular rib 27 and engaged partly, on the side facing bearing 26, by a portion of relative stud 29 for locking the inner ring of bearing 26 to stator 12. Each wedge 55 is secured to stator 12 by a respective screw 62, which loosely engages relative through hole 57 and engages the free portion of relative threaded hole 61.
Each hole 58 is engaged by a respective screw 63, from the head of which extends an axial pin 64 which pressure engages a relative cavity 65 formed in relative surface 60. The length of screw 63, complete with respective pin 64, is such that, when screw 63 is screwed substantially completely inside relative threaded hole 58 and the end portion 56 of relative wedge 55 engages groove 54, the free end of pin 64 is located outside relative cavity 65 and at a given distance from relative surface 60.

In this second embodiment, if bearing 26 calls for maintenance and/or replacement, the operator can only lock blade assembly 4 to stator 12 from outside turbine 1. The operator first fits wedges 55, complete with respective screws 63 screwed down completely, inside relative sectors 53, and connects wedges 55 to the stator by means of screws 62, which are assembled but not tightened. Next, the operator gradually unscrews screws 63 so that relative pins 64 pressure engage relative cavities 65, and end portions 56 of relative wedges 55 pressure engage groove 54. At which point, the operator tightens screws 62 to lock wedges 55 in position on stator 12.

Next, the operator may proceed, from inside nacelle 2, to lock rotor 15 to stator 12 and to remove shaft 10 and bearing 26.

The Figure 7 variation relates to a further embodiment of locking device 44, which comprises a groove 66, which is coaxial with axis 5, faces hub 7, is formed in flange 14 of stator 12, and has a V-shaped cross section; an annular groove 67, which is formed in hub 7, has a V-shaped cross section, and faces groove 66; and at least one expandable sector 68 which pressure engages grooves 66 and 67. More specifically, expandable sector 68 comprises an outer wedge-shaped member 69; an inner wedge-shaped member 70; an intermediate wedge-shaped member 71; and screws 72 which engage threaded hole 61.

Outer and inner wedge-shaped members 69 and 70 pressure engage respective grooves 66 and 68, and have respective conical faces 73 and 74 facing each other.

Tightening screws 72 causes intermediate wedge-shaped member 71 to move, with respect to outer and inner wedge-shaped members 69 and 70, along conical faces 73 and 74, and outer and inner wedge-shaped members 69, 70 to gradually expand radially. Conversely, loosening screws 72 reduces to zero the pressure exerted by expandable sector 68.

The Figure 8 variation relates to a further embodiment of locking device 44, and in particular of expandable sector 68 for pressure engaging grooves 66 and 67. In the Figure 8 example, expandable sector 68 comprises an outer wedge-shaped member 75; an inner wedge-shaped member 76; two opposite, facing intermediate wedge-shaped members 77 and 78; and screws 79 which engage the two intermediate wedge-shaped members 77 and 78.

The outer and inner wedge-shaped members 75 and 76 pressure engage respective grooves 66 and 68. Wedge-shaped member 75 has two converging faces 80 and 81, and, similarly, wedge-shaped member 76 has two converging conical faces 82 and 83.

Tightening screws 79 causes intermediate wedge-shaped members 77 and 78 to move, with respect to outer and inner wedge-shaped members 75 and 76, along conical faces 73 and 74, and outer and inner wedge-shaped members 75, 76 to gradually expand radially. Conversely, loosening screws 79 reduces to zero the pressure exerted by expandable sector 68.

The present invention obviously includes further variations of the embodiments described, without, however, departing from the scope of the following Claims.

Claims (21)

1.- Wind power turbine comprising an electric generator having a stator and a rotor; a fixed assembly including the stator; a mobile assembly including the rotor and mounted on the fixed assembly for rotation, with respect to the fixed assembly, about an axis; and a locking device for locking the mobile assembly to the fixed assembly; wherein the locking assembly comprises at least a groove, which is formed in one of the fixed assembly and the mobile assembly and is coaxial to axis;
and angular locking means suitable to be pressure engaged into the groove.
2.- Wind power turbine as claimed in claim 1, wherein the groove is an annular groove; and the angular locking means comprise wedge-shaped members carried by the other one of the fixed assembly and the mobile assembly; said wedge-shaped members being suitable to be actuated for pressure engaging the annular groove.
3.- wind power turbine as claimed in claim 2, wherein the wedge-shaped members comprises at least a set of locking screws, each locking screw engaging a relative threaded hole formed in the other one of the fixed assembly and the mobile assembly for pressure engaging the annular groove.
4.- Wind power turbine as claimed in claim 3, wherein the annular groove has a trapezoidal cross-section, and each locking screw has a conical tip suitable to pressure engage the annular groove.
5.- Wind power turbine as claimed in claim 3, wherein each locking screw is inclined with respect to the axis and the annular groove is formed along a conical surface perpendicular to the locking screws.
6.- Wind power turbine as claimed in claim 3, wherein the threaded hole is formed in the mobile assembly.
7.- Wind power turbine as claimed in claim 2, wherein the wedge-shaped members comprise a set of wedge, each engaging a relative seat formed in the other of the fixed assembly and the mobile assembly, and is moveable radially for pressure engaging the annular groove.
8.- Wind power turbine as claimed in claim 1, wherein the fixed assembly includes a nacelle, and the stator; the mobile assembly including a blade assembly, the rotor, a shaft coaxial with axis, first connection means for connecting the shaft in a dismountable manner directly to the blade assembly, second connecting means for connecting in a dismountable manner the shaft to the rotor; bearing means being set between the shaft and the stator for rotatably supporting the shaft on the stator.
9.- Wind power turbine as claimed in claim 2, wherein the angular locking means comprise first locking means for angular locking the blade assembly with respect to the stator, and second locking means for angular locking of the rotor with respect to the stator; each of said first and second locking means comprises a relative annular groove and a relative set of wedge-shaped members.
10.- Wind power turbine as claimed in claim 9, wherein the first locking means comprise a first annular groove formed in the stator and a first set of locking screw mounted on the blade assembly and suitable to be pressure engaged in the first annular groove.
11.- Wind power turbine as claimed in claim 9, wherein the first locking means comprise a first annular groove formed in the blade assembly and a set of wedge-shaped members, each engaging in a radially sliding releasable manner a relative seat formed in the stator, and is radially mobile for pressure engaging the first annular groove.
12.- Wind power turbine as claimed in claim 11, wherein first screw means are set between each wedge-shaped member and the relative seat for displacing the wedge-shaped member towards the first annular groove, and second screw means engage each wedge-shaped member for locking the wedge-shaped member in the relative seat and on the stator.
13.- Wind power turbine as claimed in claim 10, wherein the second locking means comprise a second annular groove formed in the stator, and a second set of locking screws mounted on the rotor and suitable to pressure engage the second annular groove.
14.- Wind power turbine as claimed in claim 10, wherein the annular grooves are formed along respective conical surfaces of the stator.
15.- Wind power turbine as claimed in claim 14, wherein the blade assembly comprises a hub; each locking screw of the first set of locking screws being fitted into a relative threaded hole formed in the hub.
16.- Wind power turbine as claimed in claim 14, wherein the rotor comprises an inner flange; each locking screw of the second set of locking screws being fitted into a relative threaded hole formed in said inner flange.
17.- Wind power turbine as claimed in claim 8, wherein the second connecting means comprise further wedge-shaped members set between the shaft and the rotor and screw means mounted on the further wedge-shaped members and coupled in a dismountable manner to rotor for pushing the further wedge-shaped members between the shaft and the rotor.
18.- Wind power turbine as claimed in claim 17, wherein said further wedge-shaped members comprise an annular rib coaxial with axis and having a wedge-shaped cross section.
19.- Wind power turbine as claimed in claim 18, wherein the second connecting means comprise a annular plate set in contact with a free end of shaft; a peripheral portion of the annular plate protruding towards the outside of shaft and supporting the annular rib.
20.- Wind power turbine as claimed in claim 1, wherein the docking device comprises at least a first groove formed in the fixed assembly and a second groove formed in the mobile assembly and facing the first groove; and angular locking means suitable to pressure engage the first and the second groove, preferably simultaneously.
21.- Wind power turbine as claimed in claim 20, wherein the angular docking means comprise at least an expandable annular sector comprising an outer wedge-shaped member, an inner wedge-shaped member suitable to pressure engage respectively the first and the second groove and at least an intermediate wedge-shape member suitable to selectively space apart the outer wedge-shaped member and the inner wedge-shaped member.
CA002673709A 2008-07-23 2009-07-22 Wind power turbine Abandoned CA2673709A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI2008A001340A IT1390758B1 (en) 2008-07-23 2008-07-23 WIND GENERATOR
ITMI2008A001340 2008-07-23

Publications (1)

Publication Number Publication Date
CA2673709A1 true CA2673709A1 (en) 2010-01-23

Family

ID=40566095

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002673709A Abandoned CA2673709A1 (en) 2008-07-23 2009-07-22 Wind power turbine

Country Status (9)

Country Link
US (1) US8120198B2 (en)
EP (1) EP2148090B1 (en)
AT (1) ATE539260T1 (en)
CA (1) CA2673709A1 (en)
DK (1) DK2148090T3 (en)
ES (1) ES2379317T3 (en)
HR (1) HRP20120212T1 (en)
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