Large semi-direct-drive wind driven generator

Abstract

The invention provides a large-scale semi-direct-drive wind driven generator which comprises a wind wheel, a rotor, a stator and a connecting piece, and the wind wheel is connected with a first shaft; the rotor and the wind wheel are located on the two sides of the tower drum respectively, the rotor is connected with a second shaft, and the first shaft is in transmission connection with the second shaft; the stator is mounted on the shell and corresponds to the rotor gap; the connecting piece is installed on the tower drum, the shell is installed in the connecting piece, an orthogonal force bearing is arranged between the first shaft and the connecting piece, and the orthogonal force bearing can bear radial force and axial force at the same time. In the invention, the stator, the rotor and the wind wheel are respectively arranged at two ends, so that reasonable layout is achieved, the gravity load of the wind turbine is uniformly distributed, stable power generation can be realized without arranging a counterweight, energy and consumption are saved, and the economical efficiency is extremely high.

Description

Technical Field

[0001] This invention generally relates to the field of wind power generation, and more specifically, to a large-scale semi-direct-drive wind power generation device. Background Technology

[0002] Currently, in wind power generation, the generator is usually connected to the wind turbine shaft, which causes pressure concentration. This requires complex structures to balance the pressure, and even the manufacture of large counterweights, resulting in significant economic waste and energy consumption.

[0003] Therefore, how to rationally arrange the layout to ensure a uniform distribution of the gravity load on the wind turbine is an urgent technical problem to be solved. Summary of the Invention

[0004] A primary objective of this invention is to overcome at least one of the deficiencies of the prior art and to provide a large semi-direct drive wind turbine that can be rationally laid out to ensure uniform distribution of the wind turbine's gravity load.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution:

[0006] According to one aspect of the present invention, a large semi-direct drive wind turbine is provided, comprising:

[0007] Wind turbine, which is connected to the first shaft;

[0008] The rotor and the wind turbine are located on opposite sides of the tower. The rotor is connected to a second shaft. The first shaft and the second shaft are connected by a speed increaser and a coupling. The center lines of the first shaft and the second shaft make an angle of 3-7° with the horizontal plane.

[0009] The stator is mounted on the housing and has a clearance corresponding to the rotor;

[0010] A connector is installed on the tower, and the housing is installed in the connector. An orthogonal force bearing is provided between the first shaft and the connector, and the orthogonal force bearing can simultaneously withstand radial force and axial force.

[0011] The torque of the wind turbine about the center of the tower is M, and the torque of the stator, rotor and their connecting components about the center of the tower is N. M and N are in opposite directions, and the size of M is 0.8-1.2 times the size of N.

[0012] According to one embodiment of the present invention, the wind turbine protrudes from a first side of the tower, and the stator and the rotor protrude from a second side of the tower, with the first side and the second side opposite to each other.

[0013] According to one embodiment of the present invention, the orthogonal force bearing includes a first ring, a second ring, a first roller, and a second roller. The first ring is a cylindrical ring with an inner inclined surface fitted onto the first shaft. The second ring has a U-shaped cross-section with a through hole at the bottom. Two rows of the first roller are sandwiched between the outer side of the first ring and the inner side of the second ring. The second roller is sandwiched between the end face of the first ring and the bottom surface of the second ring. The second ring is connected to the connecting member.

[0014] According to one embodiment of the present invention, two rows of first rolling bearings are sleeved between the second shaft and the housing.

[0015] According to one embodiment of the present invention, the connector is mounted on the base plate, a tower base is connected to the top of the tower, and a second rolling bearing is provided between the base plate and the tower base.

[0016] According to one embodiment of the present invention, the base plate includes a wedge-shaped structure protruding from the lower part, and a sliding bearing is provided between the wedge-shaped structure and the side of the tower base.

[0017] According to one embodiment of the present invention, the included angle between the sliding bearing and the vertical plane is 30-45 degrees.

[0018] According to one embodiment of the present invention, a brake seat is provided on the base plate, a pin is sleeved in the brake seat, a compression spring is sleeved between the pin and the brake seat, a brake hole is provided on the tower base, and the brake seat presses against the pin to perform an insertion and removal action relative to the brake hole.

[0019] According to one embodiment of the present invention, the braking holes are a structure in which multiple holes are arranged in a ring and interconnected with each other.

[0020] According to one embodiment of the present invention, the speed increase ratio of the speed increaser is 20-30, a rotating disk is connected to the output shaft of the speed increaser, and a friction device is fixed on the connecting member. The friction device grips the rotating disk for friction braking under electric or hydraulic drive.

[0021] As can be seen from the above technical solution, the advantages and positive effects of the large semi-direct drive wind turbine of the present invention are as follows:

[0022] In this invention, the stator, rotor, and wind turbine are respectively arranged at both ends to achieve a reasonable layout, thereby making the gravity load of the wind turbine evenly distributed. Stable power generation can be achieved without the need for counterweights, saving energy and consumption, and is extremely economical. Attached Figure Description

[0023] Various objects, features, and advantages of the invention will become more apparent from the following detailed description of preferred embodiments of the invention, taken in conjunction with the accompanying drawings. The drawings are merely illustrative of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein:

[0024] Figure 1 This is a schematic front view of the large semi-direct drive wind turbine of the present invention, shown in an exemplary embodiment.

[0025] Figure 2 This is a schematic diagram of the left-hand structure of the large semi-direct drive wind turbine of the present invention, shown in an exemplary embodiment. Detailed Implementation

[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that the invention will be thorough and complete, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore their detailed description will be omitted.

[0027] In the following description of various examples of the invention, reference is made to the accompanying drawings, which form part of the invention, and in which different exemplary structures, systems, and steps that can implement various aspects of the invention are shown by way of example. It should be understood that other specific embodiments of the components, structures, exemplary devices, systems, and steps may be used, and structural and functional modifications may be made without departing from the scope of the invention. Furthermore, while the terms “top,” “bottom,” “front,” “rear,” “side,” etc., may be used in this specification to describe various exemplary features and elements of the invention, these terms are used herein only for convenience, such as the orientation according to the examples shown in the drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of the structure to fall within the scope of the invention.

[0028] Figure 1 This is a schematic front view of the large semi-direct drive wind turbine of the present invention, shown in an exemplary embodiment.

[0029] Figure 2 This is a schematic diagram of the left-hand structure of the large semi-direct drive wind turbine of the present invention, shown in an exemplary embodiment.

[0030] like Figure 1 and Figure 2As shown, according to one aspect of the present invention, a large semi-direct drive wind turbine is provided, comprising a wind turbine 11, a rotor 23, a stator 7, and a connecting member 5, wherein the wind turbine 11 is connected to a first shaft 12; the rotor 23 and the wind turbine 11 are respectively located on both sides of the tower 6, the rotor 23 is connected to a second shaft 9, and the first shaft 12 and the second shaft 9 are connected by a coupling 17; the stator 7 is mounted on a housing 21 and corresponds to the rotor 23 with a clearance; the connecting member 5 is mounted on the tower 6, the housing 21 is mounted in the connecting member 5, and an orthogonal force bearing 13 is provided between the first shaft 12 and the connecting member 5, the orthogonal force bearing 13 being able to withstand both radial force and axial force simultaneously.

[0031] In this embodiment, the torque of the wind turbine 11 on the center of the tower 6 is M, and the torque of the stator 7 and rotor 23 and their connecting parts on the center of the tower 6 is N. M and N are in opposite directions, and the size of M is 0.8-1.2 times the size of N, and can be 0.9-1.1 times.

[0032] In this embodiment, the center lines of the first shaft 12 and the second shaft 9 form an angle of 3-7° with the horizontal plane, and more specifically 5-10°. The wind turbine 11 protrudes from one side of the tower 6, the stator 7 and the rotor 23 protrude from the other side of the tower 6, and the first shaft 12 is higher than the second shaft 9.

[0033] In this embodiment, the wind turbine 11 protrudes from the first side of the tower 6, and the stator 7 and rotor 23 protrude from the second side of the tower 6, with the first and second sides facing each other. They counterweight each other to ensure that the torque center coincides with the center of the tower 6.

[0034] In this embodiment, the orthogonal force bearing 13 includes a first ring, a second ring, a first roller, and a second roller. The first ring is a cylindrical ring with an inner inclined surface fitted onto a first shaft. The second ring has a U-shaped cross-section with a through hole at the bottom. Two rows of first rollers are sandwiched between the outer side of the first ring and the inner side of the second ring. A second roller is sandwiched between the end face of the first ring and the bottom surface of the second ring. The second ring is connected to a connecting piece. In this embodiment, a speed increaser 15 is provided to increase the rotational speed of the wind turbine 11 before transmission. The speed increaser 15 has a small speed increase ratio, which is 20-30. The rated speed of the wind turbine is seven or eight revolutions per minute, while the generator speed is typically several hundred revolutions per minute. The generator diameter of the semi-direct drive wind turbine of this invention is large, and its speed is three to four hundred revolutions per minute. Therefore, the speed increase ratio of the gearbox is between 20 and 30.

[0035] In this embodiment, two rows of first rolling bearings 22 are sleeved between the second shaft 9 and the housing 21.

[0036] In this embodiment, the connector 5 is mounted on the base plate 10, and a tower base 18 is connected to the top of the tower 6. A second rolling bearing 32 is provided between the base plate 10 and the tower base 18. The connector 5 includes an upper connector and a lower connector. The upper connector is arc-shaped, and the lower connector is an inclined plane.

[0037] In this embodiment, the base plate 10 includes a wedge-shaped structure protruding from the lower part, and a sliding bearing 33 is provided between the wedge-shaped structure and the side of the tower base.

[0038] In this embodiment, the angle between the sliding bearing 33 and the vertical plane is 30-45 degrees.

[0039] In this embodiment, a brake seat 3 is provided on the base plate 10, a pin 4 is sleeved in the brake seat 3, a compression spring 8 is sleeved between the pin 4 and the brake seat 3, and a brake hole is provided on the tower base 6. The brake seat 3 presses against the pin 4 to perform an insertion and removal action relative to the brake hole.

[0040] In this embodiment, the braking holes are a structure consisting of multiple interconnected holes arranged in a ring.

[0041] In this embodiment, a rotating disk 19 is connected to the output shaft of the speed increaser 15, and a friction device 16 is fixed on the connector 5. The friction device 16 grips the rotating disk 19 for friction braking under electric or hydraulic drive.

[0042] As can be seen from the above technical solution, the advantages and positive effects of the yaw-type large semi-direct drive wind turbine of the present invention are as follows:

[0043] In this embodiment, the stator 7, rotor 23 and wind turbine 11 are respectively arranged at both ends to achieve a reasonable layout, thereby making the gravity load of the wind turbine evenly distributed. Stable power generation can be achieved without the need for counterweight, saving energy and consumption, and is extremely economical.

[0044] 1. The wind turbine 11 and the stator 7 and rotor 23 of the generator are located on both sides of the tower 6, so that the static force on the tower 6 tends to be balanced.

[0045] 2. The main bearing adopts an original composite orthogonal force bearing, in which the two types of bearing rollers bear the vertical and horizontal force components respectively. The bearing rollers can be cylindrical, ball or conical.

[0046] 3. The rear bearing of the main shaft is integrated with the generator. The main shaft passes through the rear bearing, and the tail end of the main shaft is fixedly connected to the generator rotor 23, which drives the generator rotor 23 to rotate and maintains a constant air gap with the stator 7. The stator 7 has a winding section, which has the advantage of being able to make a large-diameter stator 7 and easy to dissipate heat.

[0047] 4. Connector 5 connects and fixes the generator to the main bearing housing, thus strengthening the overall structure.

[0048] 5. The yaw mechanism adopts a composite structure of rolling bearings and sliding bearings. The sliding bearings are inclined at an angle of 30-45° to the vertical plane, which can bear gravity and overturning moment.

[0049] 6. The yaw brake uses a pin 5 and a compression spring 8 mounted on the connector 5. When the cylinder or electric push rod lifts the pin, the braking effect is lost. When the pin is lowered and enters the brake hole, the braking effect is achieved.

[0050] 7. The cylindrical holes are distributed in a ring on the lower bearing shell of the yaw bearing, with a certain interval between the holes.

[0051] 8. The speed increaser 15 is shared with the main shaft bearing to increase the speed of the main drive system. The output of the speed increaser 15 is connected to the high-speed shaft.

[0052] 9. The brake of the main transmission system is located on the high-speed shaft. Under the action of the electric or hydraulic mechanism, the friction device 16 tightly grips the steel turntable and brakes, causing the wind turbine 11 to gradually stop rotating.

[0053] Those skilled in the art should understand that the specific structures and processes shown in the above detailed embodiments are merely exemplary and not restrictive. Furthermore, those skilled in the art can combine the various technical features described above in various possible ways to form new technical solutions or make other modifications, all of which fall within the scope of this invention.

Claims

1. A large semi-direct drive wind turbine generator, characterized in that, include: Wind turbine, which is connected to the first shaft; The rotor and the wind turbine are located on opposite sides of the tower. The rotor is connected to a second shaft. The first shaft and the second shaft are connected by a speed increaser and a coupling. The center lines of the first shaft and the second shaft make an angle of 3-7° with the horizontal plane. The stator is mounted on the housing and has a clearance corresponding to the rotor; A connector is installed on the tower, and the housing is installed in the connector. An orthogonal force bearing is provided between the first shaft and the connector, and the orthogonal force bearing can simultaneously withstand radial force and axial force. The torque of the wind turbine about the center of the tower is M, and the torque of the stator, rotor and their connecting components about the center of the tower is N. M and N are in opposite directions, and the size of M is 0.8-1.2 times the size of N.

2. The large semi-direct drive wind turbine generator as described in claim 1, characterized in that, The wind turbine protrudes from the first side of the tower, and the stator and the rotor protrude from the second side of the tower, with the first side and the second side facing each other.

3. The large semi-direct drive wind turbine generator as described in claim 1, characterized in that, The orthogonal force bearing includes a first ring, a second ring, a first roller, and a second roller. The first ring is a cylindrical ring with an inner inclined surface that fits onto the first shaft. The second ring has a U-shaped cross-section with a through hole at the bottom. Two rows of the first roller are sandwiched between the outer side of the first ring and the inner side of the second ring. The second roller is sandwiched between the end face of the first ring and the bottom surface of the second ring. The second ring is connected to the connecting member.

4. The large semi-direct drive wind turbine generator as described in claim 1, characterized in that, Two rows of first rolling bearings are fitted between the second shaft and the housing.

5. The large semi-direct drive wind turbine generator as described in claim 1, characterized in that, The connector is mounted on the base plate, and a tower base is connected to the top of the tower. A second rolling bearing is provided between the base plate and the tower base.

6. The large semi-direct drive wind turbine generator as described in claim 5, characterized in that, The base plate includes a wedge-shaped structure protruding from the lower part, and a sliding bearing is provided between the wedge-shaped structure and the side of the tower base.

7. The large semi-direct drive wind turbine generator as described in claim 6, characterized in that, The angle between the sliding bearing and the vertical plane is 30-45 degrees.

8. The large semi-direct drive wind turbine generator as described in claim 5, characterized in that, A brake seat is provided on the base plate, a pin is sleeved in the brake seat, a compression spring is sleeved between the pin and the brake seat, and a brake hole is provided on the tower base. The brake seat presses against the pin to perform an insertion and removal action relative to the brake hole.

9. The large semi-direct drive wind turbine generator as described in claim 8, characterized in that, The braking holes are a structure consisting of multiple interconnected holes arranged in a ring.

10. The large semi-direct drive wind turbine as described in claim 1, wherein the speed increase ratio of the speed increaser is 20-30, a rotating disk is connected to the output shaft of the speed increaser, a friction device is fixed on the connecting member, and the friction device grips the rotating disk for friction braking under electric or hydraulic drive.

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