CN110080953B

CN110080953B - Wind power generation plant

Info

Publication number: CN110080953B
Application number: CN201910301242.7A
Authority: CN
Inventors: 李高盛; 严帅; 曹菡; 鲁仰辉; 卢华兴
Original assignee: State Power Investment Group Science and Technology Research Institute Co Ltd
Current assignee: State Power Investment Group Science and Technology Research Institute Co Ltd
Priority date: 2019-04-15
Filing date: 2019-04-15
Publication date: 2021-10-15
Anticipated expiration: 2039-04-15
Also published as: CN110080953A

Abstract

The application discloses wind power generation equipment, wind power generation equipment includes: the wind wheel comprises a hub and a first bearing cavity, wherein the hub of the wind wheel is provided with the first bearing cavity; the speed increasing box is arranged in the first accommodating cavity, and an input shaft of the speed increasing box is in power coupling connection with the hub; and one of the input shaft of the generator and the output shaft of the speed increasing box is sleeved outside the other one of the input shaft of the generator and the output shaft of the speed increasing box and is in power coupling connection with the other one. The utility model provides a wind power generation equipment through redesign wheel hub, speed-increasing box, the structure position and the connection structure of generator, can reduce the axial length of complete machine by a wide margin, reduces the radial load between wind wheel and the generator, and from the size and the weight that can reduce the complete machine, reduce installation cost.

Description

Wind power generation plant

Technical Field

The application belongs to the technical field of wind power generation, and particularly relates to a wind power generation device.

Background

With the development of the wind driven generator technology, the structure of the wind driven generator tends to be large, the size of the engine room becomes larger and larger, for example, the length of the engine room of a 3MW double-fed unit reaches 15 meters, the length of the engine room of a 10MW double-fed unit reaches 20 meters, the height and the width of the engine room of the 10MW double-fed unit both reach 8 meters, the length of the engine room of a 5MW direct-drive unit also reaches 10 meters, the height and the width of the engine room both reach 6.5 meters, and accordingly, the size of the tower barrel is larger.

When the power exceeds 5MW, in order to reduce the size of the unit and reduce the weight and the cost, a direct drive unit is generally considered, namely a structure of a main shaft, a speed increasing box and a coupler without an intermediate transmission chain is adopted, and a wind wheel directly drives a generator. However, with the increase of the power of the unit, new problems are brought, namely, the generator needs more magnetic pole pairs due to too low rotating speed and large torque, so that the radial size of the generator is too large, the weight is large, the manufacture is complex, and the cost of permanent magnet materials is high.

The semi-direct-drive wind driven generator also adopts a speed increasing box with small speed increasing ratio, and the generator is driven after the rotating speed is properly increased, so that the size of the generator can be reduced to some extent, the size and the manufacturing and installation cost of the whole generator can reach a balanced state, which is basically between a double-fed type and a direct-drive type, but when the power is increased, the size and the weight of the whole generator are still too large even if a semi-direct-drive structure is adopted.

In order to improve the size of the whole semi-direct-drive wind generating set in the related art, the tail part of a gear box is arranged at the front part of a support, and the front end of the gear box supports a wind wheel through a large bearing.

Disclosure of Invention

The present application is directed to solving at least one of the problems in the prior art.

A wind power plant according to an embodiment of the application comprises: the wind wheel comprises a hub and a first bearing cavity, wherein the hub of the wind wheel is provided with the first bearing cavity; the speed increasing box is arranged in the first accommodating cavity, and an input shaft of the speed increasing box is in power coupling connection with the hub; and one of the input shaft of the generator and the output shaft of the speed increasing box is sleeved outside the other one of the input shaft of the generator and the output shaft of the speed increasing box and is in power coupling connection with the other one.

According to the wind power generation equipment provided by the embodiment of the application, the axial length of the whole machine can be greatly reduced, the radial load between the wind wheel and the generator is reduced by redesigning the structural positions and the connecting structures of the hub, the speed increasing box and the generator, so that the size and the weight of the whole machine can be reduced, and the installation cost is reduced.

A wind power plant according to an embodiment of the present application, further comprising: the wind wheel can be pivotally arranged on the main frame, a second accommodating cavity is limited by the main frame, the generator is arranged in the second accommodating cavity, and the speed increasing box is arranged on the front side of the main frame.

A wind power plant according to an embodiment of the present application, further comprising: the first accommodating cavity faces one end of the main frame and is provided with an opening, the support penetrates through the opening, and the speed increasing box is connected with the main frame through the support.

A wind power plant according to an embodiment of the present application, further comprising: the outer ring of the bearing is connected with the main frame, and the inner ring of the bearing is connected with the hub.

A wind power plant according to an embodiment of the present application, further comprising: and one end of the elastic coupling is connected with the hub, and the other end of the elastic coupling is connected with the input shaft of the speed increasing box.

According to the wind power generation equipment of one embodiment of the application, the elastic coupling is connected with the hub through a key groove structure.

According to an embodiment of the application, the elastic coupling comprises: the first end of the main body part is provided with a first flanging, the second end of the main body part is provided with a second flanging, the first flanging is connected with the hub, and the second flanging is connected with the input shaft of the speed increasing box.

According to the wind power generation equipment of one embodiment of the application, the first flanging is turned outwards along the radial direction, the inner end face of the first flanging is attached to the outer end face of the hub, and the second flanging is turned inwards along the radial direction.

According to the wind power generation equipment of an embodiment of this application, the input shaft of generator the input shaft of speed-increasing box the output shaft of speed-increasing box is the hollow shaft, the generator deviates from the one end of speed-increasing box is equipped with electric liquid conveyor, electric liquid conveyor passes through hollow shaft is to wheel hub transmission electricity, liquid.

According to an embodiment of the wind power plant, the electro-hydraulic conveying device comprises an electro-hydraulic slip ring.

Additional aspects and advantages of the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of a wind power plant according to an embodiment of the present application;

fig. 2 is a partially enlarged view of a portion a in fig. 1.

Reference numerals:

the wind power generation device comprises a wind power generation device 100, a main frame 1, a second containing cavity 12, a generator 2, a bearing 3, a speed increasing box 4, an elastic coupling 5, a first flanging 51, a second flanging 52, a main body part 53, a hub 6, a first containing cavity 61 and a support 7.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

In the description of the present application, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

A wind power generation apparatus 100 according to an embodiment of the present application is described below with reference to fig. 1 to 2, and the wind power generation apparatus 100 of the present application is a spindle-free compact type half-direct-drive wind power generation apparatus, and can be applied to a large wind power generation set and a small double-fed type set, and for the large set, the size, weight, and manufacturing and installation costs of the set can be reduced; for a small double-fed type unit, the speed increasing box 4 of the double-fed type unit is relatively small in speed increasing, and the size of the speed increasing box 4 is relatively small, so that the structure of the double-fed type unit can be adopted, and the purpose of reducing the size and the weight is achieved.

As shown in fig. 1 and 2, a wind power generation apparatus 100 according to an embodiment of the present application includes: the wind wheel is driven by wind power to rotate so as to drive the rotor of the generator 2 to rotate after the speed increasing and torque reducing of the speed increasing box 4 to generate electricity.

Wherein, the wind wheel including hub 6 and connect a plurality of blades in hub 6 periphery, hub 6 of wind wheel has first chamber 61 that holds, that is to say, hub 6 of wind wheel is hollow structure.

The speed increasing box 4 is installed in the first chamber 61 that holds, and the input shaft of speed increasing box 4 and wheel hub 6 power coupling are connected, in other words, speed increasing box 4 is installed in wheel hub 6's inside, need not the main shaft external connection between speed increasing box 4 and the wheel hub 6 like this, and can reduce the axial length sum of speed increasing box 4 and wheel hub 6 by a wide margin, and then reduce the radial load of wind wheel to speed increasing box 4.

One of the input shaft of the generator 2 and the output shaft of the speed increasing box 4 is sleeved outside the other one of the input shaft of the generator 2 and the output shaft of the speed increasing box 4, and the input shaft of the generator 2 and the output shaft of the speed increasing box 4 are in power coupling connection with each other. In a practical implementation, the input shaft of the generator 2 and the output shaft of the gearbox 4 are detachably connected, for example by a spline arrangement.

In one embodiment, the input shaft of the generator 2 is sleeved outside the output shaft of the speed increasing box 4; in another embodiment, the output shaft of the speed increasing box 4 is sleeved outside the input shaft of the generator 2. Above-mentioned structure can reduce the axial length sum of gearbox 4 and generator 2 by a wide margin, and the wind wheel shortens the back to the length of generator 2, and the arm of force that is equivalent to the wind wheel to generator 2 diminishes, can indirectly reduce the radial load of wind wheel to generator 2.

According to the wind power generation equipment 100 of the embodiment of the application, the axial length of the whole machine can be greatly reduced, the radial load between the wind wheel and the generator 2 is reduced, the size and the weight of the whole machine can be reduced, and the installation cost is reduced by redesigning the structural positions and the connection structures of the hub 6, the speed increasing box 4 and the generator 2.

In some embodiments, as shown in fig. 1 and 2, the wind power plant 100 may further comprise: the main frame 1, the main frame 1 is used for supporting the complete machine structure.

The wind wheel is pivotally mounted on the main frame 1, as shown in fig. 2, a hub 6 of the wind wheel can be pivotally connected with the main frame 1 through a bearing 3, an outer ring of the bearing 3 is connected with the main frame 1, and an inner ring of the bearing 3 is connected with the hub 6. In some embodiments, the outer race of the bearing 3 is connected to the main frame 1 by threaded fasteners and the inner race of the bearing 3 is connected to the hub 6 by threaded fasteners.

It can be understood that, since the wind power generation apparatus 100 of the present application has no main shaft structure, the hub 6 can rotate with the wind by the single bearing 3, and the weight of the wind wheel is supported on the main frame 1 by the bearing 3.

As shown in fig. 1 and 2, the wind turbine generator 100 has a bracket 7, an end of the first accommodation chamber 61 facing the main frame 1 has an opening through which the bracket 7 extends, and the speed-increasing gearbox 4 is connected to the main frame 1 through the bracket 7, a casing of the speed-increasing gearbox 4 is connected to a front end of the bracket 7, such as by a threaded fastener, and the bracket 7 extends through a rear end of the hub 6 and is connected to the main frame 1, such as by a threaded fastener. The inner diameter of the bearing 3 is larger than the outer diameter of the bracket 7, and the bearing 3 is sleeved outside the bracket 7 in an empty way.

As shown in fig. 1 and 2, the main frame 1 defines a second accommodation chamber 12, the generator 2 is mounted in the second accommodation chamber 12, and the speed increasing box 4 is mounted on the front side of the main frame 1. Thus, the generator 2 is built in, and the axial length of the whole machine is short.

As shown in fig. 1, the wind turbine 100 of the present application may further include: elastic coupling 5, elastic coupling 5's one end links to each other with wheel hub 6, and elastic coupling 5's the other end links to each other with the input shaft of acceleration rate case 4. The elastic coupling 5 can serve to cushion, dampen and reduce shock loads. The elastic coupling 5 and the hub 6 can be connected through a key groove structure so as to transmit large torque.

In one embodiment, the elastic coupling 5 comprises: the main body 53, the main body 53 may be tubular, a first end (left end in fig. 1) of the main body 53 is provided with a first flange 51, a second end (right end in fig. 1) of the main body 53 is provided with a second flange 52, the first flange 51 is connected with the hub 6, and the second flange 52 is connected with the input shaft of the gearbox 4. The anti-torsion capacity can be enhanced through the connection mode of the flanging. The first flange 51 is turned over radially outward, the inner end face of the first flange 51 is attached to the outer end face of the hub 6, and the second flange 52 is turned over radially inward. That is, the input end of the torque is turned outwards along the radial direction, and the output end of the torque is turned inwards along the radial direction, so that the shearing forces are staggered, and the fracture risk of the elastic coupling 5 can be reduced.

In some embodiments, a torque limiter may be provided inside the elastic coupling 5 to avoid damage to the internal structure due to excessive rotational torque.

In consideration of the problem of electro-hydraulic transmission of the miniaturized whole machine, in the wind power generation equipment 100 of the embodiment of the application, the input shaft of the generator 2, the input shaft of the speed increasing box 4 and the output shaft of the speed increasing box 4 are hollow shafts and are coaxially arranged. The hollow part of hollow shaft can realize electricity, transmission to wheel hub 6 of liquid from the rear end of generator 2 (the one end that deviates from speed-increasing box 4) like this to realize the transmission of electric power, signal of telecommunication and lubricating oil from main frame 1 one end to the wind wheel, wherein the one end that generator 2 deviates from the speed-increasing box is equipped with electric liquid conveyor, and electric liquid conveyor transports electricity, liquid through hollow shaft to wheel hub 6. In a practical implementation, the electro-hydraulic delivery device includes an electro-hydraulic slip ring. One side of the electro-hydraulic slip ring is fixed, the other side of the electro-hydraulic slip ring rotates, and the electro-hydraulic slip ring can transmit current and liquid.

In a specific embodiment of the present application, as shown in fig. 1 and 2, the wind power generation apparatus 100 of the present application includes a main frame 1, a generator 2, a bearing 3, a speed increasing box 4, an elastic coupling 5, a hub 6, and a bracket 7. The generator 2 is a permanent magnet generator 2, the generator 2 is installed on the inner side of the front end face of the main frame 1 through bolts, the rigid support 7 is installed on the outer side of the front end face of the main support 7, and the speed increasing box 4 is installed on the rigid support 7, so that the main frame 1, the generator 2 and the speed increasing box 4 are integrated into a whole in a rigid mode. The output shaft of the speed increasing box 4 is inserted into the hollow input shaft of the generator 2 and connected through a spline structure, so that the common coupling between the hollow input shaft and the generator is reduced, and the length of a transmission chain is reduced. The outer ring of the bearing 3 is bolted on the outer side of the front end face of the main frame 1, the inner ring is mounted with the hub 6, and the speed increasing box 4 is contained in the hub 6, so that the length occupied by the speed increasing box 4 is reduced. Through this single bearing 3, the hub 6 can be realized to rotate with the wind. The hub 6 and the input shaft of the speed increasing box 4 are directly and elastically connected through the elastic coupling 5, so that the dynamic load borne by the speed increasing box 4 is obviously reduced.

It should be noted that the transmission device does not have a main shaft in the traditional structure, which reduces the length of the whole machine, does not need a traditional main bearing seat, and has simple structure. Meanwhile, in order to enable electricity and liquid to enter the wind wheel, an electro-hydraulic slip ring is further mounted at the tail of the generator 2, so that the generator 2 and the speed increasing box 4 are provided with hollow shaft holes which are coaxially communicated. Inside the elastic coupling 5 there is also a torque limiter.

By implementing the invention, a coupling between the generator 2 and the speed increasing box 4 is cancelled, the length of the unit is reduced, the speed increasing box 4 is placed in the hub 6, the length occupied by the speed increasing box 4 is eliminated, and the whole length of the unit is greatly shortened; the hub 6 is connected with the input end of the speed increasing box 4 through the elastic coupling 5, so that the dynamic load borne by the speed increasing box 4 is reduced; the novel electro-hydraulic slip ring solves the problem that electro-hydraulic is transmitted through the hollow shaft of the generator 2 at the same time. By implementing the wind power generation device 100, the size of the wind power generation device 100 is reduced on the whole, the whole structure and performance are optimized, and the size of the whole device and the manufacturing and installation cost are balanced.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A wind power plant, characterized by comprising:

the wind wheel comprises a hub and a first bearing cavity, wherein the hub of the wind wheel is provided with the first bearing cavity;

the speed increasing box is arranged in the first accommodating cavity, and an input shaft of the speed increasing box is in power coupling connection with the hub;

one of an input shaft of the generator and an output shaft of the speed increasing box is sleeved outside the other of the input shaft of the generator and the output shaft of the speed increasing box and is in power coupling connection with the other; and

one end of the elastic coupling is connected with the hub, and the other end of the elastic coupling is connected with the input shaft of the speed increasing box, wherein

The elastic coupling is connected with the hub through a key groove structure,

alternatively, the elastic coupling comprises: the first end of the main body part is provided with a first flanging, the second end of the main body part is provided with a second flanging, the first flanging is connected with the hub, and the second flanging is connected with the input shaft of the speed increasing box;

the first flanging is turned outwards along the radial direction, the inner end face of the first flanging is attached to the outer end face of the hub, and the second flanging is turned inwards along the radial direction.

2. The wind power plant of claim 1, further comprising: the wind wheel can be pivotally arranged on the main frame, a second accommodating cavity is limited by the main frame, the generator is arranged in the second accommodating cavity, and the speed increasing box is arranged on the front side of the main frame.

3. The wind power plant of claim 2, further comprising: the first accommodating cavity faces one end of the main frame and is provided with an opening, the support penetrates through the opening, and the speed increasing box is connected with the main frame through the support.

4. The wind power plant of claim 1, further comprising: the outer ring of the bearing is connected with the main frame, and the inner ring of the bearing is connected with the hub.

5. The wind power plant according to any of claims 1 to 4, characterized in that the input shaft of the generator, the input shaft of the gearbox and the output shaft of the gearbox are hollow shafts, and an electro-hydraulic conveying device is arranged at one end of the generator facing away from the gearbox and used for conveying electricity and liquid to the hub through the hollow shafts.

6. Wind power plant according to claim 5, characterized in that the electro-hydraulic delivery means comprise electro-hydraulic slip rings.