CN112283020B

CN112283020B - Wind wheel locking device and wind generating set comprising same

Info

Publication number: CN112283020B
Application number: CN202011181830.0A
Authority: CN
Inventors: 李小伟
Original assignee: Shanghai Electric Wind Power Group Co Ltd
Current assignee: Shanghai Electric Wind Power Group Co Ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2022-05-20
Anticipated expiration: 2040-10-29
Also published as: CN112283020A

Abstract

The invention discloses a wind wheel locking device and a wind generating set comprising the same, wherein the wind generating set comprises a hub, a rotating shaft and a main frame of a cabin; in the direction of the axis of rotation of the rotary shaft, the locking piece has a first contact surface, the hub has a second contact surface engaging the first contact surface and/or the rotary shaft has a third contact surface engaging the first contact surface, the locking piece being intended to provide the hub and/or the rotary shaft with a frictional force opposing the direction of rotation of the rotary shaft. The locking block is in surface contact with the rotatable hub and/or the rotatable shaft, the rotation of the hub and/or the rotatable shaft is limited by the aid of surface friction, the locking block bears load through the first contact surface, the stress area is greatly increased, phenomena of overhigh local stress and serious deformation are avoided, and the service life of the locking block is prolonged.

Description

Wind wheel locking device and wind generating set comprising same

Technical Field

The invention relates to the field of wind power generation, in particular to a wind wheel locking device and a wind generating set comprising the same.

Background

Because maintenance personnel sometimes need to enter the wind wheel during the operation and maintenance of the wind generating set, even need to replace rotating parts in the nacelle, such as a rotating shaft and the like, in order to ensure the safety of workers, the existing wind generating set comprises a wind wheel locking system for braking and locking the wind wheel so as to limit the rotation of the wind wheel. In addition, during the process of hoisting or replacing the single blade, the wind wheel locking system is also required to lock the wind wheel so as to fix the wind wheel at a certain position.

The diameter of a wind wheel of a wind generating set in the prior art exceeds 100 meters, the weight can reach 100-200 tons, the sum of the weights of a rotating shaft and a bearing also reaches 20-40 tons, a wind wheel locking system needs to bear inertial loads caused by the wind wheel, a cabin rotating shaft and the bearing and aerodynamic loads caused by external wind, and the wind wheel locking system needs to have enough strength to bear large loads. Furthermore, considering the drive train of the hub, the rotating shaft, the gearbox and the generator, there must not be any slack and great elasticity, otherwise the drive train wear will be exacerbated and eventually damaged, which will result in prolonged down time, considerable increase in maintenance time and costs, and therefore the wind wheel locking system must also have sufficient rigidity.

Various rotor locking systems are disclosed in the prior art to limit rotation of the rotor. Patent document EP2381092a2 discloses a wind wheel locking system, which specifically comprises: the wind wheel locking system comprises a locking disc fixed on a wind wheel rotor and a locking pin fixed on a cabin supporting structure and capable of moving axially, a plurality of locking holes are formed in the locking disc, and the locking pin moves axially and is inserted into the locking holes to lock the wind wheel.

Patent document CN105587477B discloses a wind wheel locking system, which specifically includes: the wind wheel locking system comprises a locking disc and 3 locking pins, wherein 3 locking holes are formed in the locking disc, in the 3 locking pins, 1 locking pin is a bidirectional locking pin and can lock the locking disc in clockwise and anticlockwise directions, and the rest 2 locking pins are unidirectional locking pins, so that the locking of the locking disc in a single rotation direction is realized.

Patent document CN102414438A discloses a wind wheel locking system, which specifically includes: the wheel locking system comprises a wind wheel locking disc arranged on the hub and a wind wheel locking pin arranged on the base frame of the engine room, the wind wheel locking disc is provided with a plurality of locking holes, and the wind wheel locking pin is inserted into the locking holes along the radial direction of the rotation axis of the wind wheel so as to realize the locking of the wind wheel.

In the three patent documents, each wind generating set is required to be provided with one set of wind wheel locking system independently, but in practical application, the wind wheel locking system is only required to be used in the installation, operation and maintenance processes, and the manufacturing cost of the wind generating set can be greatly increased by arranging one set of wind wheel locking system independently for each wind generating set. In addition, the three patent documents all rely on the moment arm of the contact force between the locking pin and the locking hole to bear the load, and because the load that the wind wheel locking system needs to bear is very large, and the contact between the locking pin and the locking hole is almost a line contact, the contact area is very limited, which causes the contact area stress of the locking pin and the locking hole to be very high, even exceeds the yield strength of the material, enters a plastic stage, and generates unrecoverable plastic deformation. Meanwhile, the whole deformation of the wind wheel lock disc is very serious due to the large load. In addition, when the wind wheel is locked, the wind wheel has larger kinetic energy due to the rotation motion, and the locking pin and the locking hole are seriously deformed or even blocked due to the motion impact at the moment when the locking pin is inserted into the locking hole.

Disclosure of Invention

The invention aims to overcome the defects that in the prior art, the wind wheel locking device bears a large load, but the stress area is small, so that the stress of the stress area is too high and the deformation is serious, and provides the wind wheel locking device and a wind generating set comprising the same.

The invention solves the technical problems through the following technical scheme:

a wind turbine locking device for a wind turbine generator system, the wind turbine generator system comprising a hub, a rotation shaft and a main frame of a nacelle, the hub and the rotation shaft both rotating around a rotation axis, the wind turbine locking device comprising at least one locking block, the locking block being stationary relative to the main frame and being detachably connected to the main frame;

at least one of the ends of the locking block has a first contact surface in the direction of the axis of rotation, the hub has a second contact surface engaging the first contact surface and/or the rotation shaft has a third contact surface engaging the first contact surface, the locking block being adapted to provide a frictional force to the hub and/or the rotation shaft opposite to the direction of rotation of the rotation shaft.

In the scheme, the locking block is in surface contact with the hub and/or the rotating shaft which can rotate, the rotation of the hub and/or the rotating shaft is limited by means of surface friction, and the rotation of the wind wheel can be limited by limiting the rotation of one of the hub and the rotating shaft due to the fact that the hub and the rotating shaft rotate synchronously. The locking block bears load through the first contact surface, the stress area is greatly increased, the phenomena of overhigh local stress and serious deformation can not occur, and the service life of the locking block is prolonged. The locking block is detachably connected with the main frame, so that the locking block can be used in a plurality of wind generating sets, each wind generating set is not required to be independently provided with the locking block, and the manufacturing cost of the wind generating sets is reduced.

Preferably, the wind wheel locking device further comprises a pressing member connected to the locking block, the pressing member being configured to apply a pressing force to the locking block in the direction of the rotation axis toward the second contact surface and/or the third contact surface engaged with the first contact surface.

In the scheme, the pressing piece increases the friction force between the first contact surface and the second contact surface and/or the third contact surface by enhancing the pressure of the first contact surface towards the second contact surface and/or the third contact surface, namely, the static friction force for limiting the rotation of the wind wheel is increased, and the feasibility of limiting the rotation of the wind wheel through the surface friction force is enhanced.

Preferably, the hub, the rotating shaft and the locking block are connected by the pressing member.

In this solution, although the locking block can achieve the locking of the wind wheel as long as it is engaged with one of the hub or the rotating shaft, the other structure without being engaged still has the risk of partial rotation, and the above arrangement achieves the double connection of the locking block with the hub and the rotating shaft, reducing the possibility of rotation of the hub and the rotating shaft.

Preferably, the hub includes a first flange for connecting the rotating shaft, the rotating shaft includes a second flange for connecting the hub, the first flange is connected to the second flange, an end surface of the second flange, which is away from the hub in the direction of the rotation axis, is the third contact surface, and the first contact surface is engaged with the third contact surface.

In this scheme, just be provided with first flange and the second flange that is used for the interengagement originally on wheel hub and the rotation axis, the second flange is closer to the main frame for first flange, because the second flange extends to the radial outside of rotation axis main part for the rotation axis main part, consequently the second flange is along the rotation axis direction keep away from the wheel hub on the face joint locking piece also can not influence the rotation axis main part to need not to set up the third contact surface of rotation axis in addition, reduce manufacturing cost and wind generating set's total weight. Further, since the second flange is connected to the first flange, a surface of the second flange distant from the hub in the rotation axis direction serves as a third contact surface that is joined to the first contact surface, and rotation of the second flange can be restricted by restricting rotation of the second flange to rotation of the first flange connected to the second flange, and rotation of the hub can be restricted.

Preferably, the first flange is provided with a first connecting hole, the second flange is provided with a second connecting hole, the locking block is provided with a third connecting hole, and the pressing member sequentially penetrates through the third connecting hole, the second connecting hole and the first connecting hole along the rotation axis direction.

In this scheme, first flange and second flange pass through bolted connection originally, and the clamp piece has replaced the bolt that originally was used for connecting first flange and second flange in the aforesaid sets up, has reduced the quantity of fastener, has reduced manufacturing cost, can need not in addition trompil on first flange and the second flange, shortens process time.

Preferably, the first contact surface has an arc shape, and the first contact surface includes, in a radial direction of the rotary shaft, a first outer contour line located radially outward of the rotary shaft and a first inner contour line located radially inward of the rotary shaft, and the first outer contour line and the first inner contour line are each an arc line.

In this embodiment, since the first contact surface is engaged with the third contact surface of the second flange, and the third contact surface of the second flange is generally a torus, the engaging area of the first contact surface with the third contact surface is larger than that of the first contact surface with a square shape such as a rectangle, and the force-bearing area of the locking block is larger, so that the locking block is less likely to deform.

Preferably, the third contact surface includes, in a radial direction of the rotary shaft, a second outer contour line located radially outward of the rotary shaft and a second inner contour line located radially inward of the rotary shaft, the first outer contour line and the second outer contour line being coincident, and the first inner contour line and the second inner contour line being coincident.

In this scheme, the setting makes the area of contact of first contact surface and third contact surface be the maximum value, further increases the lifting surface area of locking piece, prevents that the locking piece warp.

Preferably, the wind wheel locking device further comprises a limiting block, the limiting block is connected between the locking block and the main frame, and the limiting block is used for fixing the locking block on the main frame.

In this scheme, provide one kind with the locking block and fix the mode on the main frame, make things convenient for the installation and the dismantlement of locking block.

Preferably, the length of the stopper in the direction of the rotation axis is greater than the length of the locking block in the direction of the rotation axis.

In this scheme, the main frame is less in size in the radial direction of rotation axis, want to improve the stability that wind wheel locking device fixes on the main frame through increasing the fixed area of wind wheel locking device on the main frame, just need occupy the length size of main frame in the rotation axis direction, increase the length of wind wheel locking device in the rotation axis direction promptly, but the locking piece mainly functions is first contact surface, increase the length of wind wheel locking device in the rotation axis direction and can not increase the area of first contact surface, still make the locking piece heavier, it is inconvenient to transport. The arrangement enables the fixed area of the wind wheel locking device on the main frame to be increased, meanwhile, the size of the locking block does not need to be increased, and transportation of the locking block is facilitated.

Preferably, at least one end of the limiting block along the rotation axis is provided with a fourth contact surface, the fourth contact surface and the first contact surface are on the same plane, and the fourth contact surface is engaged with the second contact surface and/or the third contact surface.

In this scheme, above-mentioned setting can further increase the joint area of wind wheel locking device and wheel hub and/or rotation axis, increases wind wheel locking device's stress area, effectively prevents wind wheel locking device's deformation, increases wind wheel locking device's life.

Preferably, the limiting block is movable relative to the main frame in a direction away from the second contact surface and/or the third contact surface, or the limiting block is detachably connected to the main frame.

In this scheme, provide the connected mode of two kinds of stoppers and main frame for prevent that wind generating set normal operating in-process stopper's fourth contact surface and wheel hub and/or rotation axis from producing the friction.

A wind park comprising a rotor locking device as described above.

Preferably, the wind generating set is a gear box type wind generating set.

The positive progress effects of the invention are as follows: the locking block is in surface contact with the rotatable hub and/or the rotating shaft, the rotation of the hub and/or the rotating shaft is limited by surface friction, and the rotation of the wind wheel can be limited by limiting the rotation of one of the hub and the rotating shaft due to the synchronous rotation of the hub and the rotating shaft. The locking block bears load through the first contact surface, the stress area is greatly increased, the phenomena of overhigh local stress and serious deformation can not occur, and the service life of the locking block is prolonged. The locking block is detachably connected with the main frame, so that the locking block can be used in a plurality of wind generating sets, each wind generating set is not required to be independently provided with the locking block, and the manufacturing cost of the wind generating sets is reduced.

Drawings

Fig. 1 is a schematic perspective view of a wind turbine generator system according to embodiment 1 of the present invention.

Fig. 2 is a schematic perspective view of a hub and a rotating shaft connecting portion according to embodiment 1 of the present invention.

Fig. 3 is another perspective view of the hub and the rotating shaft connecting portion according to embodiment 1 of the present invention.

Fig. 4 is a schematic perspective view of a wind turbine locking device according to embodiment 1 of the present invention.

Fig. 5 is a front view schematically showing the structure of the wind wheel locking device according to embodiment 1 of the present invention.

Fig. 6 is a side view schematically showing the engagement of the locking block and the second flange according to embodiment 1 of the present invention.

Fig. 7 is a schematic view of the connection relationship between the locking block and the hub and the rotating shaft according to embodiment 1 of the present invention.

Fig. 8 is a side view schematically showing the structure of the locking block of embodiment 2 of the present invention, which is engaged with only the hub.

Fig. 9 is another side view of the locking block of embodiment 2 of the present invention engaging only the hub.

FIG. 10 is a side view schematically showing the locking block of embodiment 3 of the present invention engaged with only the rotating shaft.

FIG. 11 is another side view of the locking block of embodiment 3 of the present invention, which is only engaged with the rotation shaft.

Fig. 12 is a side view schematically showing the structure of the locking block of embodiment 4 of the present invention engaged with the hub and the rotary shaft at the same time.

Fig. 13 is another side view of the locking block of embodiment 4 of the present invention simultaneously engaging the hub and the rotating shaft.

Description of reference numerals:

tower 11

Bearing 12

Blade 13

Bearing seat 14

Nacelle 2

Main frame 21

Rotating shaft 3

Second flange 31

Third contact surface 32

Second outline 321

Second inner contour line 322

Second connection hole 33

Second lock disk 34

Hub 4

First flange 41

First connection hole 42

Second contact surface 43

First locking disk 44

Locking block 5

First contact surface 51

The first outer contour line 511

First inner contour 512

Third connecting hole 52

Pressing part 6

Stop block 7

Fourth contact surface 71

Detailed Description

The invention is further illustrated by the following examples, which are not intended to limit the scope of the invention.

Example 1

As shown in fig. 1 to 4, the present embodiment discloses a wind turbine generator set including a tower 11, a nacelle 2, a rotating shaft 3, a bearing 12, a bearing housing 14, a hub 4, and a blade 13. As shown in fig. 1, the lower end of the tower 11 is fixed to the ground and is kept stationary with respect to the ground, the upper end of the tower 11 is connected to a yaw system (not shown in the drawings), and a main frame 21 of the nacelle 2 is also connected to the yaw system, the main frame 21 being rotatable with respect to the tower 11 about the axis of the tower 11.

The inside of the nacelle 2 is provided with an electrical device such as a generator, as shown in fig. 2, the front end of the main frame 21 is connected with a bearing seat 14, the bearing seat 14 is fixed on the main frame 21 and keeps stationary relative to the main frame 21, a fixed ring of the bearing 12 and the bearing seat 14 are in interference fit and keep relatively stationary, and a rotating ring of the bearing 12 and the rotating shaft 3 are in interference fit for providing the rotating speed of the wind wheel to the generator located inside the nacelle 2. The rotating shaft 3 is connected between the hub 4 and the nacelle 2, the hub 4 is positioned in front of the nacelle 2 and the rotating shaft 3, the blades 13 are connected to the side surface of the hub 4, the blades 13 and the hub 4 form a wind wheel, and the bearing 12, the rotating shaft 3, the hub 4 and the blades 13 rotate synchronously around the rotating axis. The front and back directions in the present embodiment are based on the direction of the external air flow flowing through the wind turbine generator system, wherein along the rotation axis direction, the side where the hub 4 is located is the windward end of the wind turbine generator system, i.e. the front direction of the wind turbine generator system, and the side where the nacelle 2 is located is the leeward end of the wind turbine generator system, i.e. the back direction of the wind turbine generator system.

As shown in fig. 3, one end of the hub 4 facing the rotary shaft 3 in the direction of the rotation axis is provided with a coupling hole (not shown in the figure), and the hub 4 includes a first flange 41 for coupling the rotary shaft 3, and the first flange 41 extends from a hole wall of the coupling hole to a radially inner side of the coupling hole. The rotary shaft 3 includes a second flange 31 for connecting the hub 4, the second flange 31 extending from the outer wall surface of the body of the rotary shaft 3 toward the radially outer side of the rotary shaft 3. The hub 4 and the rotating shaft 3 are connected through the connection of the first flange 41 and the second flange 31, so that the hub 4 and the rotating shaft 3 can rotate synchronously.

As shown in fig. 2 and 4-7, the wind turbine generator further includes a wind wheel locking device for braking and locking the wind wheel, the wind wheel locking device includes a locking block 5, a pressing member 6 and a limiting block 7, and the wind wheel locking device is disposed between the wind wheel and the main frame 21 so as to facilitate installation and detachment of the wind wheel locking device.

As shown in fig. 4 to 7, the lock block 5 is fixed to the main frame 21 and is held stationary with respect to the main frame 21, and the lock block 5 is disposed between the second flange 31 of the rotary shaft 3 and the bearing 12. The surface of the locking block 5 facing the second flange 31 in the rotation axis direction is a first contact surface 51, the surface of the second flange 31 facing the locking block 5 in the rotation axis direction is a third contact surface 32, the first contact surface 51 is engaged with the third contact surface 32, and the locking block 5 is used for providing a friction force to the rotating shaft 3 opposite to the rotating direction of the rotating shaft 3 to limit the rotation of the rotating shaft 3.

Although the rotating shaft 3 does not belong to a part of the wind wheel, the rotating shaft 3 is connected with the hub 4 in the wind wheel and synchronously rotates, so that the rotation of the wind wheel can be limited by limiting the rotation of the rotating shaft 3, and the purposes of braking and locking the wind wheel are achieved.

Since the main frame 21 rotates around the axis of the tower 11, and the rotor and the rotation shaft rotate around the rotation axis, the main frame 21 can rotate, but the rotation direction of the main frame is completely different from that of the rotor and the rotation shaft. The braking and locking of the rotor in the present embodiment means that the rotor and the rotation shaft are kept relatively stationary with respect to the main frame 21, i.e. the nacelle 2.

The locking block 5 in this embodiment is in surface contact with the rotatable rotating shaft 3, and the rotation of the rotating shaft 3 is restricted by surface friction force, thereby restricting the rotation of the wind wheel. The locking block 5 bears the large load which needs to be borne by the wind wheel locking device through the first contact surface 51, the stress area is greatly increased, the phenomena of overhigh local stress and serious deformation can not occur, and the service life of the locking block 5 is prolonged. Preferably, the first contact surface 51 and the third contact surface 32 are both flat surfaces, and the contact area between the flat surfaces is large, so that the stress area of the locking block 5 is further increased, and the deformation of the locking block 5 is prevented.

The first flange 41 and the second flange 31 are both structures which are already arranged in the conventional wind turbine generator set, and the present embodiment directly uses the surface of the second flange 31 facing the lock block 5 in the rotation axis direction as the third contact surface 32 which is engaged with the first contact surface 51 of the lock block 5, so that the third contact surface 32 of the rotating shaft 3 is not required to be additionally arranged, and the manufacturing cost and the total weight of the wind turbine generator set are reduced.

Since the hub 4 and the rotary shaft 3 are connected to each other by the first flange 41 and the second flange 31, the third contact surface 32 is a surface of the second flange 31 facing the lock block 5 in the rotation axis direction, and the rotation of the rotary shaft 3 can be restricted by the lock block 5 and the rotation of the hub 4 can be restricted by the second flange 31. The reliability of the locking of the rotor is higher compared to the situation where only the rotation axis 3 is restricted, reducing the risk of local rotation of the hub 4.

Since the second flange 31 has a generally circular configuration, the third contact surface 32 of the second flange 31 also has a generally circular ring shape, and preferably, the first contact surface 51 has an arc-shaped plane, the first contact surface 51 includes a first outer contour 511 located radially outside the rotating shaft 3 and a first inner contour 512 located radially inside the rotating shaft 3 along the radial direction of the rotating shaft 3, and both the first outer contour 511 and the first inner contour 512 are arcs. Compared with the first contact surface 51 with a square shape such as a rectangle, the arc-shaped first contact surface 51 has a larger joint area with the third contact surface 32 under the condition that the length and the width of the first contact surface are the same, so that the stress area of the locking block 5 is larger and the locking block is less prone to deformation.

The annular third contact surface 32 comprises, in the radial direction of the rotary shaft 3, a second outer contour 321 situated radially outside the rotary shaft 3 and a second inner contour 322 situated radially inside the rotary shaft 3. Further preferably, the first outer contour line 511 overlaps the second outer contour line 321, and the first inner contour line 512 overlaps the second inner contour line 322, so that the contact area between the first contact surface 51 and the third contact surface 32 can be maximized, the force-receiving area of the lock block 5 can be further increased, and the lock block 5 can be prevented from being deformed.

The locking block 5 is detachably connected with the main frame 21, and the locking block 5 needs to be detached from the wind generating set in the normal operation process of the wind generating set, so that the second flange 31 of the rotating shaft 3 and the locking block 5 always generate friction in order to prevent the rotating shaft 3 from rotating, the wind generating set is not only easy to operate unsmoothly, but also the second flange 31 and the locking block 5 are easy to wear. On the other hand, the disassembled locking block 5 can be used on other wind generating sets needing wind wheel locking, and like the traditional wind generating sets, each wind generating set is not required to be provided with a set of wind wheel locking device independently, so that the manufacturing cost of the wind generating sets is reduced.

The number of the locking blocks 5 can be one or more, and the specific number is to ensure that the frictional torque provided by the first contact surface 51 of the locking block 5 is equal to or greater than the load to be borne by the wind turbine locking device, and is related to the size of the locking block 5, the pressure between the locking block 5 and the second flange 31, the roughness of the first contact surface 51 and other factors.

In other alternative embodiments, also not limited to increasing the force-bearing area of the lock block 5 by increasing the area of the single first contact surface 51, the size of the single lock block 5 may be designed to be small based on whether the installation and removal are convenient, and if the area of the single first contact surface 51 is small, several lock blocks 5 may be provided.

Because the wind wheel is locked by the surface friction force, the strength is increased by increasing the friction force, and the specific mode comprises increasing the pressure between the locking block 5 and the second flange 31, making the first contact surface 51 rougher and the like, and having little relation with the material of the locking block 5, so that the locking block 5 does not need to be made of the material with higher yield strength, and the manufacturing cost of the wind generating set is reduced.

As shown in fig. 7, the first flange 41 is provided with a first connection hole 42, the second flange 31 is provided with a second connection hole 33, and the conventional wind turbine generator system connects the hub 4 and the rotating shaft 3 by bolting the first connection hole 42 and the second connection hole 33. In this embodiment, the locking block 5 is provided with a third connecting hole 52, and the pressing member 6 sequentially penetrates through the third connecting hole 52 of the locking block 5, the second connecting hole 33 of the second flange 31 and the first connecting hole 42 of the first flange 41 along the rotation axis direction, so as to connect the locking block 5, the rotating shaft 3 and the hub 4. The pressing member 6 is used for applying a pressure force towards the third contact surface 32 to the locking block 5 along the rotation axis direction, and strengthening the pressure force between the first flange 41 and the second flange 31, and the friction force between the first contact surface 51 and the third contact surface 32 is strengthened by increasing the pressure force, so that the static friction force for limiting the rotation of the rotating shaft 3 is increased, and the feasibility of limiting the rotation of the wind wheel through the surface friction force is enhanced. The pressing member 6 in this embodiment may be a fastener such as a bolt.

The pressing piece 6 replaces bolts which are used for connecting the first flange 41 and the second flange 31 in the prior art, the effect of connecting the hub 4 and the rotating shaft 3 is achieved, the effect of strengthening the pressure between the second flange 31 and the locking block 5 is achieved, the first connecting hole 42 and the second connecting hole 33 are structures which are already arranged in the prior art for connecting the hub 4 and the rotating shaft 3, the first connecting hole 42 and the second connecting hole 33 are directly used as the connecting holes of the pressing piece 6 in the embodiment, the using amount of fasteners is reduced, the manufacturing cost is reduced, holes do not need to be additionally formed in the first flange 41 and the second flange 31, and the processing time is shortened.

As shown in fig. 4 to 5, the stopper 7 is connected between the locking block 5 and the main frame 21 and is located closer to the radial outer side of the rotating shaft 3 than the locking block 5, and one stopper 7 is provided at each of both ends of one locking block 5 in the circumferential direction of the rotating shaft 3. The limiting block 7 is used for fixing the locking block 5 on the main frame 21, so that the locking block 5 can be conveniently mounted and dismounted. The specific connection between the stop block 7 and the locking block 5 is not specifically described in the embodiment, and those skilled in the art can use well-known technical means to realize the connection between the two, such as bolt connection or pin connection.

In order to improve the stability of fixing the wind wheel locking device with respect to the main frame 21, it is preferable to increase the fixing area of the wind wheel locking device with respect to the main frame 21. Since the main frame 21 is small in size in the radial direction of the rotating shaft 3, in order to increase the stability of fixing the wind wheel locking device to the main frame 21 by increasing the fixing area of the wind wheel locking device to the main frame 21, it is necessary to occupy the length of the main frame 21 in the direction of the rotation axis, that is, to increase the length of the wind wheel locking device in the direction of the rotation axis. However, the lock block 5 mainly functions as the first contact surface 51, and increasing the length of the lock block 5 in the rotation axis direction does not increase the area of the first contact surface 51, but rather makes the lock block 5 too heavy to be transported and installed.

The length of the limiting block 7 in the rotation axis direction is larger than that of the locking block 5 in the rotation axis direction, so that the length of the locking block 5 in the rotation axis direction is not changed under the condition of increasing the length size of the wind wheel locking device in the rotation axis direction, the size of the locking block 5 is not increased while the fixing area of the wind wheel locking device on the main frame 21 is increased, and the transportation and the installation of the locking block 5 are facilitated.

Preferably, the stopper 7 has a fourth contact surface 71 along the rotation axis direction, and the fourth contact surface 71 is on the same plane as the first contact surface 51 and is combined with the third contact surface 32, so as to further increase the joint area of the wind wheel locking device and the second flange 31 of the rotating shaft 3, increase the stressed area of the wind wheel locking device, prevent the wind wheel locking device from deforming, and increase the service life of the wind wheel locking device.

In order to prevent friction between the fourth contact surface 71 of the limiting block 7 and the second flange 31 during normal operation of the wind generating set, the limiting block 7 is detachably connected with the main frame 21. Under this kind of connected mode, locking piece 5 and stopper 7 can be a whole, also can be locking piece 5 and stopper 7 detachable connection.

In other alternative embodiments, the limiting block 7 may not be detachable from the main frame 21, in which case, the locking block 5 is detachably connected to the limiting block 7, and in order to prevent friction between the fourth contact surface 71 and the second flange 31, it is preferable that the limiting block 7 is configured to be movable relative to the main frame 21, the limiting block 7 moves close to the third contact surface 32 during locking of the wind turbine, and the limiting block 7 moves away from the third contact surface 32 relative to the main frame 21 during normal operation of the wind turbine generator set and rotation of the wind turbine.

The specific connection manner of the limiting block 7 and the main frame 21 is not specifically described in this embodiment, and a person skilled in the art can use the technical means known in the art to realize the detachable connection and the movable connection of the limiting block 7 and the main frame 21, for example, the limiting block 7 and the main frame 21 can be connected by bolts to realize the detachable connection of the two.

Preferably, the wind turbine generator system in this embodiment is a gear box type wind turbine generator system, and a gear box of the gear box type wind turbine generator system is disposed behind the bearing 12. The rotating speed of the wind wheel is generally low and cannot meet the rotating speed required by the generator, and the gear box is used for increasing the rotating speed of the wind wheel so that the rotating speed meets the rotating speed requirement of the generator.

Example 2

The structure of the wind wheel locking device in this embodiment is substantially the same as that in embodiment 1, except that the locking block 5 is not engaged with the second flange 31 of the rotating shaft 3.

As shown in fig. 8 to 9, the hub 4 includes a first locking plate 44, a face of the first locking plate 44 facing the main frame 21 in the rotation axis direction is a second contact face 43, a face of the locking block 5 facing the hub 4 in the rotation axis direction is a first contact face 51, the first contact face 51 is engaged with the second contact face 43, and the locking block 5 is configured to provide a frictional force to the hub 4 opposite to the rotation direction of the hub 4 to restrict the rotation of the hub 4. The rotation direction of the hub 4 is the same as the rotation direction of the rotary shaft 3.

As shown in fig. 9, the pressing member 6 in this embodiment is a bolt, and the pressing member 6 is screwed with the threaded holes on the first lock plate 44 and the lock block 5 to apply a pressing force to the lock block 5 toward the second contact surface 43 of the first lock plate 44, thereby increasing the frictional force between the first contact surface 51 and the second contact surface 43.

In other alternative embodiments, the compression member 6 may be a ram or the like in addition to the fastener, and the compression member 6 presses against the lock block 5 to increase the pressure between the first lock disk 44 and the lock block 5, thereby increasing the friction therebetween. This way no holes are punched in the first locking disk 44 and the locking block 5.

The specific location of the first locking disc 44 is only illustrated in fig. 8-9 and may be mounted at other locations on the hub 4.

Example 3

As shown in fig. 10 to 11, the rotary shaft 3 includes a second lock disk 34, a surface of the second lock disk 34 facing the main frame 21 in the rotation axis direction is a third contact surface 32, a surface of the lock block 5 facing the hub 4 in the rotation axis direction is a first contact surface 51, the first contact surface 51 is engaged with the third contact surface 32, and the lock block 5 is configured to provide a frictional force to the rotary shaft 3 opposite to the rotation direction of the rotary shaft 3 to restrict the rotation of the rotary shaft 3.

As shown in fig. 11, the pressing member 6 in this embodiment is a bolt, and the pressing member 6 is screwed with the threaded holes on the second lock disk 34 and the lock block 5 to apply a pressing force to the lock block 5 toward the third contact surface 32 of the second lock disk 34, thereby increasing the frictional force between the first contact surface 51 and the third contact surface 32.

In other alternative embodiments, the compression member 6 may be a ram or the like in addition to the fastener, and the compression member 6 presses against the lock block 5 to increase the pressure between the second lock disk 34 and the lock block 5, thereby increasing the friction therebetween. This way no holes are punched in the second locking disk 34 and the locking block 5.

The specific location of the second lock disk 34 is only illustrated in fig. 8-9 and may be mounted at other locations on the rotary shaft 3.

Example 4

The structure of the wind wheel locking device in this embodiment is substantially the same as that in embodiment 1 except that the locking piece 5 is not engaged with the second flange 31 of the rotating shaft 3.

As shown in fig. 12 to 13, the hub 4 includes a first lock disk 44, the rotary shaft 3 includes a second lock disk 34, the lock block 5 is disposed between the first lock disk 44 and the second lock disk 34, both surfaces of the lock block 5 in the rotational axis direction are first contact surfaces 51, a surface of the first lock disk 44 facing the main frame 21 in the rotational axis direction is a second contact surface 43, and a surface of the second lock disk 34 facing the main frame 21 in the rotational axis direction is a third contact surface 32. Wherein a first contact surface 51 engages with the second contact surface 43 and the locking piece 5 is adapted to provide a friction force to the hub 4 opposite to the rotational direction of the hub 4 to limit the rotation of the hub 4. The other first contact surface 51 is engaged with the third contact surface 32 for providing the rotary shaft 3 with a frictional force opposite to the rotation direction of the rotary shaft 3 to restrict the rotation of the rotary shaft 3. The rotation direction of the hub 4 is the same as the rotation direction of the rotary shaft 3. The locking block 5 simultaneously limits the rotation of the hub 4 and the rotating shaft 3, and the reliability of wind wheel locking is improved.

As shown in fig. 13, the pressing member 6 in this embodiment is a bolt, and the pressing member 6 is screwed with the threaded holes of the first lock disk 44, the second lock disk 34 and the lock block 5 to apply a pressing force to the lock block 5 toward the second contact surface 43 of the first lock disk 44 and a pressing force toward the third contact surface 32 of the second lock disk 34, thereby increasing the frictional force between the first contact surface 51 and the second contact surface 43 and the frictional force between the first contact surface 51 and the third contact surface 32.

In other alternative embodiments, the compression member 6 may be a ram or the like in addition to the fastener, and the compression member 6 presses against the lock block 5 to increase the pressure between the first lock disk 44 and the lock block 5 and the pressure between the second lock disk 34 and the lock block 5, thereby increasing the friction therebetween. This is done without making holes in the first lock disk 44, the second lock disk 34 and the lock block 5.

The specific locations of the first and

second lock disks

44, 34 are only illustrated in fig. 12-13 and may be mounted at other locations on the hub 4 and the rotatable shaft 3.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, are used in an orientation or positional relationship indicated based on the orientation or positional relationship of the device or component as it is normally used, merely to facilitate the description of the invention and to simplify the description, and are not intended to indicate or imply that the device or component so referred to must have a particular orientation, be constructed and operated in a particular orientation at any time, unless otherwise specified herein.

While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims

1. A wind turbine locking device for a wind turbine generator system, the wind turbine generator system comprising a hub, a rotation shaft and a main frame of a nacelle, the hub and the rotation shaft both rotating about a rotation axis, the wind turbine locking device for limiting the rotation of the hub and the rotation shaft relative to the main frame, characterized in that the wind turbine locking device comprises at least one locking block, the locking block being stationary relative to the main frame and being detachably connected to the main frame;

2. The wind rotor locking device according to claim 1, further comprising a pressing member connected to the locking block for applying a pressing force to the locking block in the direction of the rotation axis toward the second contact surface and/or the third contact surface engaged with the first contact surface.

3. The wind turbine locking device of claim 2, wherein the hub, the rotating shaft and the locking block are connected by the compression member.

4. A wind turbine locking device according to claim 3, wherein the hub comprises a first flange for connecting the rotating shaft, the rotating shaft comprises a second flange for connecting the hub, the first flange is connected with the second flange, an end surface of the second flange facing away from the hub in the direction of the rotation axis is the third contact surface, and the first contact surface is engaged with the third contact surface.

5. The wind turbine locking device according to claim 4, wherein the first flange is provided with a first connection hole, the second flange is provided with a second connection hole, the locking block is provided with a third connection hole, and the pressing member passes through the third connection hole, the second connection hole, and the first connection hole in the rotation axis direction in this order.

6. The wind turbine locking device of claim 4, wherein the first contact surface is arcuate, the first contact surface comprising a first outer contour radially outward of the rotational axis and a first inner contour radially inward of the rotational axis in a radial direction of the rotational axis, the first outer contour and the first inner contour each being arcuate.

7. The wind turbine locking device according to claim 6, wherein the third contact surface includes a second outer contour line located radially outside the rotation shaft and a second inner contour line located radially inside the rotation shaft in a radial direction of the rotation shaft, the first outer contour line and the second outer contour line being coincident, and the first inner contour line and the second inner contour line being coincident.

8. The wind wheel locking device according to claim 1, further comprising a stopper connected between the locking block and the main frame, the stopper being used to fix the locking block to the main frame.

9. The wind turbine locking device according to claim 8, wherein a length of the stopper block in the rotation axis direction is greater than a length of the locking block in the rotation axis direction.

10. The wind wheel locking device of claim 8, wherein the stop block has a fourth contact surface along at least one end of the rotational axis, the fourth contact surface being coplanar with the first contact surface, the fourth contact surface engaging the second contact surface and/or the third contact surface.

11. The wind turbine locking device according to claim 10, wherein the stopper is movable with respect to the main frame in a direction away from the second contact surface and/or the third contact surface, or the stopper is detachably connected to the main frame.

12. A wind park according to any of claims 1-11, wherein the wind park comprises a rotor locking device according to any of the claims.

13. The wind park according to claim 12, wherein the wind park is a gearbox-type wind park.