CN214944731U

CN214944731U - Horizontal shaft wind turbine with obliquely-arranged tower and wind generating set

Info

Publication number: CN214944731U
Application number: CN202120814532.4U
Authority: CN
Inventors: 李文龙; 梁涛
Original assignee: Ningbo Aisi Information Technology Co ltd
Current assignee: Ningbo Aisi Information Technology Co ltd
Priority date: 2021-04-20
Filing date: 2021-04-20
Publication date: 2021-11-30
Anticipated expiration: 2031-04-20

Abstract

The utility model discloses a horizontal axis wind turbine and wind generating set that pylon slope was placed, this horizontal axis wind turbine includes: the upper end of the tower is provided with a supporting seat; the hub is rotationally connected to the supporting seat, and a plurality of impellers are arranged on the circumference of the hub at intervals; a generator compartment disposed at a bottom of the tower; and the hub is in transmission connection with the generator cabin through the transmission assembly. The tower is arranged to be inclined, the generator room is arranged at the bottom of the tower, the distance between the blade tip and the tower is increased, and the blade tip is prevented from colliding with the tower after being deformed under the action of wind power; the tower tilts to lead the gravity center to move forwards, the bending moment generated by gravity is opposite to the bending moment generated by wind power, partial load can be offset, and the size of the tower can be reduced; the inclination angle of the axis of the wind wheel can be reduced, the swept area of the impeller is increased, and the wind energy capture efficiency is improved.

Description

Horizontal shaft wind turbine with obliquely-arranged tower and wind generating set

Technical Field

The utility model belongs to the technical field of wind energy conversion system, specifically speaking relates to a horizontal axis wind energy conversion system and wind generating set that pylon slope was placed.

Background

At present horizontal axis aerogenerator's structure, generally adopt and fix the vertically pylon, the generator compartment is connected with the pylon rotation through rotatable driftage system, and wheel hub is connected with the cabin rotation, and this kind of structural style has following 2 main problems:

1. the engine room is heavy, difficult to hoist, difficult to install and maintain and difficult to maintain in the later period;

2. when the wind power generator works, the deflection of the blade tip along the wind direction is large, and in order to avoid the blade tip from colliding with a tower, the hub shaft needs to be inclined upwards, so that the wind energy capturing efficiency is reduced.

In view of this, the present invention is provided.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in overcoming prior art's not enough, provides a horizontal axis wind energy conversion system and wind generating set that pylon slope was placed to reduce the weight at pylon top, improve wind energy capture efficiency.

In order to solve the technical problem, the utility model adopts the following basic concept:

an aspect of the utility model provides a horizontal axis wind turbine that pylon slope was placed, include:

the upper end of the tower is provided with a supporting seat;

the hub is rotationally connected to the supporting seat, and a plurality of impellers are arranged on the circumference of the hub at intervals;

A generator compartment disposed at a bottom of the tower;

and the hub is in transmission connection with the generator cabin through the transmission assembly.

In some embodiments of the invention, the tower is arranged inclined towards the windward side.

In some embodiments of the present invention, the axis of the hub is parallel to the wind direction.

In some embodiments of the invention, the tower is non-circular in cross-section and the plane of maximum bending stiffness of the tower coincides with the plane of maximum bending moment applied to the tower.

In some embodiments of the present invention, the power generator further comprises a base, and the generator compartment is rotatably connected to the base.

In some embodiments of the present invention, the base is rotatably connected to a rotary platform, and the generator room is disposed on the rotary platform.

In some embodiments of the present invention, the bottom of the tower is fixedly connected to the revolving platform, and the generator housing is disposed at the bottom of the tower and fixedly connected to the revolving platform.

In some embodiments of the present invention, the rotary platform and the base are connected by a gear transmission.

The utility model discloses an in some embodiments, be equipped with on the base and encircle the cooperation ring gear that rotary platform's axis of rotation set up, the last driving motor that is equipped with of rotary platform, the last drive gear that is equipped with of driving motor, drive gear with cooperation ring gear meshing cooperation.

In some embodiments of the present invention, the transmission assembly includes a transmission shaft rotatably disposed in the tower, the output shaft of the hub is connected to the upper end of the transmission shaft, and the input shaft of the generator room is connected to the lower end of the transmission shaft.

In some embodiments of the present invention, the transmission assembly further includes a first transmission member and a second transmission member, the first transmission member is disposed in the support seat, and the second transmission member is disposed at the bottom of the tower;

the first transmission piece comprises a first bevel gear and a second bevel gear meshed with and matched with the first bevel gear, the first bevel gear is arranged on the output shaft, and the second bevel gear is connected with the upper end of the transmission shaft;

the second transmission piece comprises a third bevel gear and a fourth bevel gear meshed and matched with the third bevel gear, the third bevel gear is arranged on the input shaft, and the fourth bevel gear is connected with the lower end of the transmission shaft.

The utility model discloses another aspect provides a wind generating set, the horizontal axis wind energy conversion system of placing including the slope of above-mentioned pylon.

After the technical scheme is adopted, compared with the prior art, the utility model following beneficial effect has:

The tower is inclined, the distance D between the blade tip and the tower can be increased, the blade tip is prevented from colliding the tower after being deformed under the action of wind power, the inclination angle of the axis of the wind wheel can be reduced to zero, the swept area of the impeller can be increased, and the wind energy capture efficiency is improved.

The inclination of the tower can lead the gravity center to move forward, the bending moment generated by gravity is opposite to the bending moment generated by wind power, namely, the gravity can offset the load under the action of partial wind power, and the size of the tower can be reduced.

The tower is arranged to be inclined, the generator room is arranged at the bottom of the tower, so that the weight of the upper end of the tower is reduced, the dynamic stiffness of the system is improved, the structural strength of the tower can be reduced, the weight of the tower is reduced, the transportation difficulty of the tower is reduced, and meanwhile, the generator room is arranged at the bottom of the tower, so that the generator room is convenient to install, maintain and overhaul.

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention without limitation. It is obvious that the drawings in the following description are only some embodiments, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. In the drawings:

FIG. 1 is a schematic view of a horizontal axis wind turbine according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a horizontal axis wind turbine according to an embodiment of the present invention;

fig. 3 is a schematic view of an impeller according to an embodiment of the present invention with its axis parallel to the wind direction;

fig. 4 is a schematic view of an impeller according to an embodiment of the present invention, with an angle between the axis of the impeller and the direction of the wind;

fig. 5 is a schematic perspective view of a horizontal axis wind turbine according to an embodiment of the present invention.

In the figure: 1. a tower; 11. a supporting seat; 2. a hub; 21. an impeller; 22. an output shaft; 3. a generator compartment; 31. an input shaft; 4. a transmission assembly; 41. a drive shaft; 42. a first transmission member; 43. a second transmission member; 5. a base; 51. matching the gear ring; 6. a rotating platform; 61. a drive motor; 611. a drive gear; f1, first direction; f2, second direction; m1, bending moment generated by wind power; m2, bending moment due to self gravity.

It should be noted that the drawings and the description are not intended to limit the scope of the inventive concept in any way, but to illustrate the inventive concept by those skilled in the art with reference to specific embodiments.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments, and the following embodiments are used for illustrating the present invention, but do not limit the scope of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 5, an aspect of the present invention provides a horizontal axis wind turbine with a tilted tower, including: the tower comprises a tower frame 1, wherein a supporting seat 11 is arranged at the upper end of the tower frame 1; the hub 2 is rotatably connected to the supporting seat 11, and a plurality of impellers 21 are arranged on the hub 2 at intervals in the circumferential direction; a generator room 3, wherein the generator room 3 is arranged at the bottom of the tower 1; and the hub 2 is in transmission connection with the generator room 3 through the transmission assembly 4.

It can be understood that the weight of the upper end of the tower 1 is reduced by disposing the generator room 3 at the bottom of the tower 1, and the structural strength of the tower 1 can be reduced to reduce the weight of the tower 1, thereby reducing the difficulty of transportation of the tower 1, and at the same time, the installation, maintenance and overhaul of the generator room 3 are facilitated by installing the generator room 3 at the bottom of the tower 1.

It should be noted that, after capturing wind energy, the plurality of impellers 21 drive the hub 2 to rotate, so as to convert the wind energy into mechanical energy, the hub 2 transmits the mechanical energy to the generator room 3 through the transmission assembly 4, and the generator room 3 converts the mechanical energy into electric energy, so that the generator room 3 generates electricity.

As shown in fig. 1, in some embodiments of the present invention, the tower 1 is disposed to be inclined toward the windward side. It can be understood that the wind direction is a first direction F1, the opposite direction to the first direction F1 is a second direction F2, the second direction F2 is a windward side, and the center of gravity of the tower 1 is shifted towards the second direction F2 by obliquely arranging the tower 1 towards the second direction F2, so that an included angle a is formed between the axis of the tower 1 in the length direction and the vertical direction, and the bending moment M1 generated by the wind force received by the tower 1 and the bending moment M2 generated by the self gravity are opposite in direction, so that the bending moment received by a part of the tower 1 can be offset, and the load of the tower 1 can be reduced.

Meanwhile, the tower 1 is inclined towards the second direction F2, so that the distance D between the blade tip of the impeller 21 and the tower 1 is increased, and the problem of collision between the blade tip of the impeller 21 and the tower 1 is avoided. Further, since there is no need to consider the collision between the blade tip and the tower 1, the axis of the hub does not need to be tilted upward (i.e. the hub is raised toward the impeller side), in some embodiments of the present invention, the axis of the hub 2 is parallel to the wind direction, thereby increasing the swept area of the impeller 21 for capturing wind energy, and further improving the wind energy capturing efficiency.

It should be noted that, as shown in fig. 3, when the axis of the hub 2 is parallel to the wind direction, the swept area of the impeller 21 is R1, and as shown in fig. 4, when the axis of the hub 2 forms an angle with the wind direction, the swept area of the impeller 21 is R2, and further R1 is greater than R2, and thus it is understood that the larger the angle between the axis of the hub 2 and the wind direction is, the smaller the swept area of the impeller 21 is.

The utility model discloses the advantage that pylon slope was placed: 1. the distance D between the blade tip and the tower is increased, so that the blade tip is prevented from colliding with the tower after being deformed under the action of wind power; 2. the tower inclines to lead the gravity center to move forward, the bending moment generated by gravity is opposite to the bending moment generated by wind power, namely, the gravity can offset the load under the action of partial wind power, and the size of the tower can be reduced; 3. the inclination angle of the axis of the wind wheel can be reduced, the swept area of the impeller is increased, and the wind energy capture efficiency is improved.

Meanwhile, in order to fully utilize the rigidity of the tower and reduce the use of materials as much as possible, the cross section of the tower 1 is non-circular, and the plane of the maximum bending rigidity of the tower 1 is superposed with the plane of the maximum bending moment applied to the tower 1. When a circular cross section is adopted, the bending rigidity of the vertical periphery of the tower frame 1 is relatively uniform, and the first direction and the second direction are main stress surfaces, so that the design of uniform bending strength is adopted in the circumferential direction, and material waste is caused; if a non-circular cross section is adopted, the bending strength of the surfaces in the first direction and the second direction is designed to be higher, and the bending strength of other surfaces is properly reduced, so that the use of materials can be reduced, the cost is saved, and the self weight is reduced. Such as: the cross section of the tower frame 1 is rectangular, the bending strength of the surface corresponding to the first direction and the second direction is higher, the bending strength of the other two surfaces is lower, compared with the bending moments of the first direction and the second direction, the bending strength of the surface corresponding to the direction is consistent, namely, the bending moment is large, the designed bending strength is also large, the bending moment is small, the designed bending strength is also small, and the material design strength and the use amount are reduced on the premise of meeting the requirements.

As shown in fig. 1 and 5, in some embodiments of the present invention, the present invention further includes a base 5, and the generator housing 3 is rotatably connected to the base 5. It will be appreciated that, because the wind direction is random, when the wind direction changes, by rotating the generator nacelle 3 and thus the tower 1, the impeller 21 can be aligned with the wind direction so that the impeller 21 can obtain the maximum wind energy.

In some embodiments, the yawing system may also be mounted at the bottom of the tower 1, thereby facilitating installation, maintenance and servicing of the yawing system. Wherein the yaw system functions to align the wind direction quickly and smoothly when the direction of the wind speed vector is changed so that the impeller 21 obtains the maximum wind energy.

In some embodiments, the yaw system includes a detecting element, which may be a sensor or a wind direction/anemometer, and a control system, wherein the detecting element may be disposed on the generator nacelle 3, and since the wind direction is random, the detecting element detects the flowing direction of the airflow and transmits the detection result to the control system, and the control system receives the detection result and controls the tower 1 to rotate, so that the impeller 21 obtains the maximum wind energy.

In some embodiments of the present invention, the base 5 is rotatably connected to a rotary platform 6, and the generator room 3 is disposed on the rotary platform 6. It will be appreciated that by locating nacelle 3 on a rotating platform 6, rotating platform 6 on base 5 is driven, and rotating platform 6 rotates to rotate tower 1 and nacelle 3, so that rotation of tower 1 and nacelle 3 is more reliable.

In another scheme, the bottom of the tower frame 1 is fixedly connected with the rotary platform 6, and the generator room 3 is sleeved at the bottom of the tower frame 1 and is fixedly connected with the rotary platform 6. Namely, the tower 1 is directly connected with the rotary platform 6 through the generator room 3, and the generator room 3 can also have a certain supporting function on the side edge of the tower 1.

In some embodiments of the present invention, the rotary platform 6 and the base 5 are connected by a gear transmission. Thereby, the drive fit between the turntable 6 and the base 5 is made more reliable. In some embodiments, the transmission structure between the rotating platform 6 and the base 5 may also adopt a worm and gear transmission, a belt transmission or other transmission forms as long as the rotating platform 6 can realize high-torque low-speed rotation, and the transmission structure form is not limited herein.

In some embodiments of the present invention, the base 5 is provided with a matching gear ring 51 surrounding the rotation axis of the rotary platform 6, the rotary platform 6 is provided with a driving motor 61, the driving motor 61 is provided with a driving gear 611, and the driving gear 611 is engaged with the matching gear ring 51.

It can be understood that the driving gear 611 is mounted on the motor shaft of the driving motor 61, and by controlling the forward rotation and the reverse rotation of the driving motor 61, the driving gear 611 is controlled to rotate, and since the driving gear 611 is meshed with the mating gear ring 51, the rotating platform 6 can be driven to rotate relative to the base 5 when the driving gear 611 rotates, so that the rotation of the tower 1 and the generator cabin 3 is more reliable.

In some embodiments, there may be a plurality of driving motors 61, and the plurality of driving motors 61 are arranged at intervals along the circumferential direction of the rotating platform 6, so as to ensure the stability of the rotation of the rotating platform 6, in this embodiment, there are two driving motors 61.

As shown in fig. 2, in some embodiments of the present invention, the transmission assembly 4 includes a transmission shaft 41 rotatably disposed in the tower 1, the output shaft 22 of the hub 2 is in transmission connection with the upper end of the transmission shaft 41, and the input shaft 31 of the generator compartment 3 is in transmission connection with the lower end of the transmission shaft 41. It can be understood that, by arranging the transmission shaft 41 in the tower 1, the purpose of protecting the transmission shaft 41 can be achieved, and the stability of kinetic energy transmission can be ensured.

As shown in fig. 2, in some embodiments of the present invention, the transmission assembly 4 further includes a first transmission member 42 and a second transmission member 43, the first transmission member 42 is disposed in the support seat 11, and the second transmission member 43 is disposed at the bottom of the tower frame 1; the first transmission member 42 includes a first bevel gear and a second bevel gear engaged with the first bevel gear, the first bevel gear is disposed on the output shaft 22, and the second bevel gear is connected to the upper end of the transmission shaft 41; the second transmission member 43 includes a third bevel gear disposed on the input shaft 31 and a fourth bevel gear engaged with the third bevel gear, and the fourth bevel gear is connected to the lower end of the transmission shaft 41. Thereby, the transfer of kinetic energy is made simpler and more reliable.

The utility model discloses another aspect provides a wind generating set, horizontal axis wind turbine including foretell pylon slope is placed.

According to the utility model discloses wind generating set is through setting up generator cabin 3 in the bottom of pylon 1 to alleviate the weight of pylon 1 upper end, and then can reduce pylon 1's structural strength, with the weight that reduces pylon 1, thereby reduce pylon 1's the transportation degree of difficulty, simultaneously, through installing generator cabin 3 in the bottom of pylon 1, thereby be convenient for installation, maintenance and the maintenance of generator cabin 3.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and although the present invention has been disclosed with reference to the above preferred embodiment, but not to limit the present invention, any person skilled in the art can make some changes or modifications to equivalent embodiments without departing from the scope of the present invention, and any simple modification, equivalent change and modification made to the above embodiments by the technical spirit of the present invention still fall within the scope of the present invention.

Claims

1. A horizontal axis wind turbine with a tower placed obliquely is characterized by comprising:

the tower comprises a tower frame (1), wherein a supporting seat (11) is arranged at the upper end of the tower frame (1);

the wheel hub (2) is rotatably connected to the supporting seat (11), and a plurality of impellers (21) are arranged on the wheel hub (2) at intervals in the circumferential direction;

a generator compartment (3), the generator compartment (3) being arranged at the bottom of the tower (1);

the hub (2) is in transmission connection with the generator cabin (3) through the transmission component (4).

2. A tower tilt placed horizontal axis wind turbine according to claim 1, wherein the tower (1) is tilted towards the windward side.

3. A tower tilt placed horizontal axis wind turbine according to claim 2, wherein the axis of the hub (2) is parallel to the wind direction.

4. A tower tilt positioned horizontal axis wind turbine according to claim 1, wherein the tower (1) is non-circular in cross-section and the plane of maximum bending stiffness of the tower (1) coincides with the plane of maximum bending moment exerted on the tower (1).

5. A tower tilt positioned horizontal axis wind turbine according to claim 1, further comprising a foundation (5), wherein said generator nacelle (3) is rotatably connected to said foundation (5).

6. The wind turbine with the tower placed obliquely and the horizontal shaft as claimed in claim 5, wherein a revolving platform (6) is rotatably connected to the base (5), and the generator room (3) is arranged on the revolving platform (6).

7. The wind turbine with the horizontal shaft and the obliquely arranged tower frame as claimed in claim 6, wherein the rotating platform (6) is connected with the base (5) through gear transmission, a matching gear ring (51) arranged around the rotating axis of the rotating platform (6) is arranged on the base (5), a driving motor (61) is arranged on the rotating platform (6), a driving gear (611) is arranged on the driving motor (61), and the driving gear (611) is meshed with the matching gear ring (51).

8. The wind turbine with the tower placed obliquely and the horizontal shaft as claimed in claim 1, wherein the transmission assembly (4) comprises a transmission shaft (41) rotatably arranged in the tower (1), the output shaft (22) of the hub (2) is in transmission connection with the upper end of the transmission shaft (41), and the input shaft (31) of the generator cabin (3) is in transmission connection with the lower end of the transmission shaft (41).

9. A tower tilt-placed horizontal axis wind turbine according to claim 8, wherein the transmission assembly (4) further comprises a first transmission member (42) and a second transmission member (43), the first transmission member (42) is arranged in the support base (11), the second transmission member (43) is arranged at the bottom of the tower (1);

The first transmission piece (42) comprises a first bevel gear and a second bevel gear meshed with the first bevel gear, the first bevel gear is arranged on the output shaft (22), and the second bevel gear is connected with the upper end of the transmission shaft (41);

the second transmission piece (43) comprises a third bevel gear and a fourth bevel gear meshed with the third bevel gear, the third bevel gear is arranged on the input shaft (31), and the fourth bevel gear is connected with the lower end of the transmission shaft (41).

10. A wind turbine generator system comprising a horizontal axis wind turbine with an inclined tower according to any one of claims 1 to 9.